1. A mechanical password padlock comprises a lock beam, a lock body, a password wheel assembly and a lock cylinder assembly, wherein the lock beam comprises a long lock rod, a short lock rod and a connecting rod for connecting the long lock rod and the short lock rod, the lock cylinder assembly comprises a lock cylinder, a lock cylinder shell and a telescopic sleeve, the lock cylinder shell is provided with a blade hole, the lock body is provided with a lock cylinder cavity corresponding to the lock cylinder shell, the mechanical password padlock is characterized in that the cross section of the lock cylinder cavity is circular, the lock cylinder shell is in a circular tube shape, the outer peripheral surface of the lock cylinder shell is provided with a lock cylinder pin hole, the lock body is provided with a first pin hole corresponding to the lock cylinder pin hole, the lock cylinder shell and the lock body are fixedly connected through a first pin inserted into the lock cylinder pin hole and the first pin hole, the outer peripheral surface of the lock cylinder is provided with a rotating groove, the lock body is provided with a second pin hole corresponding to the rotating groove and accommodating a second pin, the second pin is inserted into the rotation groove through the cylinder case portion.

2. The mechanical combination padlock of claim 1, wherein the top surface of the telescopic sleeve is provided with a locking hole capable of accommodating part of the short locking rod, the locking hole accommodates part of the short locking rod in a locking state, the upper part of the lock cylinder is a connecting pipe with a spiral through hole on the outer peripheral surface, the telescopic sleeve is provided with a connecting column inserted into the connecting pipe, or the lower part of the telescopic sleeve is a connecting pipe with a spiral through hole on the outer peripheral surface, the lock cylinder is provided with a connecting column inserted into the connecting pipe, the connecting column is provided with a connecting pin hole corresponding to the spiral through hole, the connecting pin hole accommodates a connecting pin inserted into the connecting pin hole, and the lock body is provided with a telescopic sleeve cavity which accommodates the telescopic sleeve and has a circular cross section and is concentric with the lock cylinder cavity.

3. The mechanical combination padlock of claim 2, wherein the cylinder shell covers the helical through hole, and wherein the cylinder shell inner diameter is greater than the telescoping sleeve outer diameter.

4. The mechanical combination padlock of claim 3, wherein the combination wheel assembly comprises a plurality of combination wheels having a plurality of engaging and disengaging notches on an inner peripheral surface thereof, and a plurality of engaging and disengaging sleeves each rotatably driven by one of the combination wheels and having a protruding block on an outer peripheral surface thereof, the protruding block being receivable in the engaging and disengaging notches, the lock body being provided with a blocking portion above the combination wheels, the blocking portion being provided with an unlocking notch, the long locking bar being rotatably connected to the engaging and disengaging sleeves and axially fixed thereto.

5. The mechanical combination padlock of claim 4, wherein the blocking portion blocks the clutch sleeve to prevent the lock beam from being pulled out when the combination wheel is in a wrong position, the unlocking notch corresponds to the bump position when the combination wheel is in a right position, the lock beam can be pulled out to separate the short lock rod from the telescopic sleeve, the lock beam can be rotated to unlock after the short lock rod is separated from the lock hole, and the section of the unlocking notch is semicircular.

6. The mechanical combination padlock of claim 5, wherein the long locking rod is provided with an upper limiting part and a lower limiting part, the upper limiting part abuts against the upper end face of the uppermost clutch sleeve of the combination wheel assembly, the lower limiting part abuts against the lower end face of the lowermost clutch sleeve of the combination wheel assembly, the upper limiting part is an axial surface, the lower limiting part is a snap spring, and the long locking rod is provided with a snap spring groove for accommodating the lower limiting part.

7. The mechanical combination padlock of claim 6, wherein the lock body defines mounting slots on an outer peripheral surface thereof, the mounting slots being located below the blocking portion and respectively receiving one of the combination wheels, the first pin hole being located on one of the mounting slot sidewalls, and the second pin hole being located on one of the mounting slot sidewalls.

8. The mechanical combination padlock of claim 7, wherein the combination wheel has a plurality of positioning slots formed in an outer peripheral surface thereof, the lock body is disposed in a positioning hole corresponding to the positioning slots, and a compression spring and a positioning pin partially received in the positioning slot are received in the positioning hole.

9. The mechanical combination padlock of claim 8, wherein the connecting pin hole is concentric and in communication with one of the positioning holes, wherein the first pin hole is concentric and in communication with one of the positioning holes, and wherein the connecting pin is concentric and in communication with the first pin hole when the lock cylinder is in the locked position or the unlocked position.

10. The mechanical combination padlock of claim 9, wherein a blocking portion is also provided below the combination wheel, the lock body is provided with a long lock cavity for accommodating the long lock rod and the clutch sleeve, the lock body is fixedly provided with an end cover which is sleeved outside the long lock rod and used for covering the long lock cavity, the lower end of the lock cylinder is provided with a flange abutting against the end surface of the lock cylinder shell, the end cover is provided with a lock positioning notch, the lock beam is provided with a lock positioning protrusion corresponding to the position of the lock positioning notch, when the short lock rod corresponds to the position of the lock positioning notch, the lock positioning protrusion corresponds to the position of the lock positioning notch, the upper end of the inner circumferential surface of the combination wheel is provided with a convex ring, and the clutch notch is arranged on the convex ring;

when the telescopic sleeve is in a locking position, the lock beam abuts against the bottom of the lock hole; when the telescopic sleeve is positioned at an unlocking position, the lug is separated from the convex ring when the lock beam can move downwards when all the password wheels are positioned correctly respectively, and the password wheels can rotate relative to the clutch sleeve; or the end cover is provided with a reset notch, the lock beam can rotate to a reset position after moving upwards to be separated from the lock hole, so that the lock positioning bulge corresponds to the reset notch, the lock beam can move downwards to separate the convex block from the convex ring, and the password wheel can rotate relative to the clutch sleeve.

Background

The invention patent of China with application number 201821883403.5 discloses a prying-resistant password mechanical password padlock with a lock cylinder, which comprises a shell (a lock body) and a lock hook (a lock beam), wherein the shell is internally provided with a lock cylinder assembly and a password wheel assembly, the lock cylinder assembly comprises the lock cylinder and an expansion part (an expansion sleeve), the lock cylinder is provided with a spiral slideway matched with the expansion part, one end of the expansion part is provided with a lock hole matched with a short rod end of the lock hook, the other end of the expansion part is in contact with the spiral slideway and forms axial movement matching along the expansion part along with circumferential rotation of the lock cylinder, the expansion part is internally provided with a spring cavity for accommodating a spring, one end of the spring cavity is provided with a radial through groove communicated with the spring cavity, the radial through groove is communicated with the lock hole, the inner wall of the shell is provided with a jacking block inserted into the radial through groove and forms extrusion and press fit with the spring, the periphery of the lock cylinder assembly is provided with a metal prying-resistant block (a lock cylinder shell), the inner side surface of the metal anti-pry block is provided with an elongated slot matched with a lock cylinder marble, the upper end and the lower end of the outer side of the metal anti-pry block are provided with contact surfaces attached to the shell, and the metal anti-pry block is fixedly connected with the shell through the contact surfaces. The code wheel assembly comprises a cam sleeve (clutch sleeve) sleeved on the long rod end (long lock rod) of the lock hook and a digit wheel (code wheel) arranged on the cam sleeve, wherein the outer wall of the long rod end of the lock hook is provided with an upper limiting block and a lower limiting block (an upper limiting part and a lower limiting part) which are in axial limiting fit with the cam sleeve.

Among the prior art, the upper and lower end in the outside of metal pick-proof piece is provided with the conflict face of laminating with the casing, and metal pick-proof piece both sides have set up two archs, and is fixed with the cooperation of the special-shaped cavity (lock core chamber) of lock body, and metal pick-proof piece constitutes fixed connection through between conflict face and the casing. The lock body cannot be formed using new material as a blank.

In addition, the structure of the spring arranged between the telescopic piece and the lock cylinder is complex.

The lock beam in the prior art needs to be provided with a plurality of locking convex lock beam lock bodies, and the structure is complex.

Disclosure of Invention

The invention aims to provide a mechanical coded padlock, wherein the section of a lock cylinder cavity is circular, and a lock body can be machined and molded by taking a section as a blank.

In order to achieve the above object, the present invention provides a mechanical combination padlock, comprising a lock beam, a lock body, a combination wheel assembly and a lock cylinder assembly, wherein the lock beam comprises a long lock rod, a short lock rod and a connecting rod for connecting the long lock rod and the short lock rod, the lock cylinder assembly comprises a lock cylinder, a lock cylinder shell and a telescopic sleeve, the lock cylinder shell is provided with a blade hole, the lock body is provided with a lock cylinder cavity corresponding to the lock cylinder shell, the cross section of the lock cylinder cavity is circular, the lock cylinder shell is in a circular tube shape, the outer circumferential surface of the lock cylinder shell is provided with a lock cylinder pin hole, the lock body is provided with a first pin hole corresponding to the lock cylinder pin hole, the lock cylinder shell and the lock body are fixedly connected through a first pin inserted into the lock cylinder pin hole and the first pin hole, the outer circumferential surface of the lock cylinder is provided with a rotation groove, the lock body is provided with a second pin hole corresponding to the rotation groove and accommodating a second pin, the second pin is inserted into the rotation groove through the cylinder case portion.

In an embodiment of the present invention, a lock hole capable of accommodating a part of the short lock rod is formed in a top surface of the telescopic sleeve, the lock hole accommodates a part of the short lock rod in a locked state, a connecting pipe having a spiral through hole on an outer peripheral surface is arranged at an upper portion of the lock cylinder, the telescopic sleeve is provided with a connecting post inserted into the connecting pipe, or a connecting pipe having a spiral through hole on an outer peripheral surface is arranged at a lower portion of the telescopic sleeve, the lock cylinder is provided with a connecting post inserted into the connecting pipe, the connecting post is provided with a connecting pin hole corresponding to the spiral through hole, the connecting pin hole accommodates a connecting pin inserted into the connecting pin hole, and the lock body is provided with a telescopic sleeve cavity which accommodates the

In one embodiment of the invention, the lock cylinder shell covers the spiral through hole, and the inner diameter of the lock cylinder shell is larger than the outer diameter of the telescopic sleeve.

In one embodiment of the invention, the code wheel assembly comprises a plurality of code wheels with a plurality of clutch notches on the inner peripheral surface and a plurality of clutch sleeves which are respectively driven by one code wheel to rotate and are sleeved on the outer peripheral surface of the long lock rod and provided with a convex block, the convex block can be accommodated in the clutch notches, the lock body is provided with a blocking part positioned above the code wheels, the blocking part is provided with an unlocking notch, the long lock rod is rotatably connected with the clutch sleeves and is axially fixed,

in an embodiment of the invention, when the password wheel is in a wrong position, the blocking part blocks the clutch sleeve to prevent the lock beam from being pulled out, when the password wheel is in a right position, the unlocking notch corresponds to the position of the bump, the lock beam can be pulled out to separate the short lock rod from the telescopic sleeve, after the short lock rod is separated from the lock hole, the lock beam can be rotated to unlock, and the section of the unlocking notch is semicircular.

In an embodiment of the present invention, the long lock rod is provided with an upper limit portion abutting against an upper end surface of a clutch sleeve at the uppermost of the password wheel assemblies, and a lower limit portion abutting against a lower end surface of the clutch sleeve at the lowermost of the password wheel assemblies, the upper limit portion is an axial surface, the lower limit portion is a snap spring, and the long lock rod is provided with a snap spring groove accommodating the lower limit portion.

In an embodiment of the present invention, the lock body has an outer circumferential surface provided with mounting grooves located below the blocking portion and respectively accommodating one of the code wheels, the first pin hole is located on a side wall of one of the mounting grooves, and the second pin hole is located on a side wall of one of the mounting grooves.

In one embodiment of the present invention, the periphery of the code wheel is provided with a plurality of positioning slots, the lock body is provided with positioning holes corresponding to the positioning slots, and the positioning holes contain compression springs and positioning pins which can be partially contained in the positioning slots.

In one embodiment of the invention, the connecting pin hole is communicated and concentric with one of the positioning holes, the first pin hole is communicated and concentric with one of the positioning holes, and the connecting pin is communicated and concentric with the first pin hole when the lock cylinder is in the locking position or the unlocking position.

In an embodiment of the invention, a blocking part is also arranged below the password wheel, the lock body is provided with a long lock cavity for accommodating the long lock rod and the clutch sleeve, the lock body is fixedly provided with an end cover which is sleeved outside the long lock rod and used for covering the long lock cavity, the lower end of the lock core is provided with a flange abutting against the end surface of the lock core shell, the end cover is provided with a lock positioning gap, the lock beam is provided with a lock positioning bulge corresponding to the position of the lock positioning gap, when the short lock rod corresponds to the position of the lock positioning gap, the lock positioning bulge corresponds to the position of the lock positioning gap, the upper end of the inner circumferential surface of the password wheel is provided with a convex ring, and the clutch gap is arranged on the convex ring;

when the telescopic sleeve is in a locking position, the lock beam abuts against the bottom of the lock hole; when the telescopic sleeve is positioned at an unlocking position, the lug is separated from the convex ring when the lock beam can move downwards when all the password wheels are positioned correctly respectively, and the password wheels can rotate relative to the clutch sleeve; or the end cover is provided with a reset notch, the lock beam can rotate to a reset position after moving upwards to be separated from the lock hole, so that the lock positioning bulge corresponds to the reset notch, the lock beam can move downwards to separate the convex block from the convex ring, and the password wheel can rotate relative to the clutch sleeve.

The cross section of the lock cylinder cavity is circular, the lock cylinder shell is in a circular tube shape, a lock cylinder pin hole is formed in the peripheral surface of the lock cylinder shell, a first pin hole corresponding to the positioning hole is formed in the lock body, the lock cylinder shell and the lock body are fixedly connected through a first pin inserted into the lock cylinder pin hole and the first pin hole, a rotating groove is formed in the peripheral surface of the lock cylinder, a second pin hole corresponding to the rotating groove and containing a second pin is formed in the lock body, and the second pin penetrates through the part of the lock cylinder shell and is inserted into the rotating groove. The section of the lock cylinder cavity is circular, and the lock body can be processed and formed by adopting a section bar as a blank.

In addition, the password wheel assembly comprises a plurality of password wheels with a plurality of clutch notches on the inner peripheral surfaces and a plurality of clutch sleeves which are respectively sleeved outside the long lock rod and driven by the password wheels to rotate, wherein the outer peripheral surfaces of the long lock rods are provided with convex blocks, the convex blocks can be accommodated in the clutch notches, the lock body is provided with a blocking part positioned above the password wheels, the blocking part is provided with unlocking notches, the long lock rod is rotatably connected with the clutch sleeves and is axially fixed, and the clutch sleeves and the lock beam are simple in structure and convenient to install.

Drawings

Figure 1 is a block diagram of a mechanical combination padlock according to a first embodiment of the present invention.

Fig. 2 is an exploded view of the mechanical combination padlock of fig. 1.

Figure 3 is a cross-sectional view of the lock body of figure 2.

Figure 4 is a cross-sectional view of the lock body and partial lock cylinder of figure 2.

Figure 5 is a cross-sectional view of the mechanical combination padlock of figure 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A mechanical password padlock comprises a lock beam 1, a lock body 2, a password wheel 31 assembly 3 and a lock core 41 assembly 4, wherein the lock beam 1 comprises a long lock rod 11, a short lock rod 12 and a connecting rod 13 connecting the long lock rod 11 and the short lock rod 12, the lock core 41 assembly 4 comprises a lock core 41, a lock core shell 42, a telescopic sleeve 43 and a plurality of blades 44, the lock core shell 42 is provided with a blade hole 420, the lock body 2 is provided with a lock core cavity 210 corresponding to the lock core shell 42, the cross section of the lock core cavity 210 is circular, the lock core shell 42 is in a circular tube shape, the outer peripheral surface of the lock core shell 42 is provided with a lock core pin hole 42a, the lock body 2 is provided with a first pin hole 2a corresponding to the lock core pin hole 42a, the lock core shell 42 and the lock body 2 are fixedly connected through a first pin 201 inserted into the lock core pin hole 42a and the first pin hole 2a, the lock core 41 is provided with a rotating groove 41b on the outer peripheral surface, the lock body 2 is provided with a second pin hole 2b corresponding to the rotating groove 41b and accommodating a second pin 202, the second pin 202 is partially inserted into the rotation groove 41b through the cylinder housing 42.

The top surface of the telescopic sleeve 43 is provided with a lock hole 430 capable of accommodating part of the short lock rod 12, the lock hole 430 accommodates part of the short lock rod 12 in a locking state, the upper part of the lock cylinder 41 is a connecting pipe 411 with a spiral through hole 41c on the outer peripheral surface, the telescopic sleeve 43 is provided with a connecting column 431 inserted into the connecting pipe 411, the lock cylinder 41 is provided with a connecting column 431 inserted into the connecting pipe 411, the connecting column 431 is provided with a connecting pin hole 43c corresponding to the spiral through hole 41c, the connecting pin hole 43c is provided with a connecting pin 401 inserted into the connecting pin hole 43c, the lock body 2 is provided with a telescopic sleeve cavity 220 which is circular in cross section and concentric with the lock cylinder cavity 210 and is used for accommodating the telescopic sleeve 43, the spiral through hole 41c is covered by the lock cylinder shell, and the inner diameter of the lock cylinder shell 42 is larger than the outer diameter of the telescopic sleeve 43. When the lock core shell 42 is installed, the lock core 41 can be sleeved downwards from the outside of the telescopic sleeve 43. The connecting pin hole 43c and the connecting pin 401 are connected and fixed in an interference fit manner.

In other embodiments, the lower part of the telescopic sleeve is a connecting pipe with a spiral through hole on the outer peripheral surface.

The password wheel 31 assembly 3 comprises a plurality of password wheels 31 with a plurality of clutch notches 310 on the inner peripheral surface and a plurality of clutch sleeves 32 which are respectively driven by the password wheels 31 to rotate and are sleeved on the outer peripheral surface of the long lock rod 11 and are provided with a convex block 321, the convex block 321 can be accommodated in the clutch notches 310, the lock body 2 is provided with a blocking part 25 positioned above the password wheels 31, the blocking part 25 is provided with an unlocking notch 250, the long lock rod 11 is rotatably connected with the clutch sleeves 32 and is axially fixed,

when the position of the password wheel 31 is wrong, the stop part 25 stops the clutch sleeve 32 to prevent the lock beam 1 from being pulled out, when the position of the password wheel 31 is correct, the unlocking notch 250 corresponds to the position of the bump 321, the lock beam 1 can be pulled out to separate the short lock rod 12 from the telescopic sleeve 43, after the short lock rod 12 is separated from the lock hole 430, the lock beam 1 can be unlocked in a rotating mode, the section of the unlocking notch 250 is semicircular, a circular hole is drilled at the unlocking notch at the moment of processing, and then a large circular hole is drilled at the long lock cavity.

The long lock rod 11 is provided with an upper limit part 111 which abuts against the upper end surface of the uppermost clutch sleeve 32 of the password wheel 31 assembly 3 and a lower limit part 112 which abuts against the lower end surface of the lowermost clutch sleeve 32 of the password wheel 31 assembly 3, the upper limit part 111 is an axial surface, the lower limit part 112 is a snap spring, and the long lock rod 11 is provided with a snap spring groove 110 which accommodates the lower limit part 112.

The outer peripheral surface of the lock body 2 is provided with a mounting groove 260 which is positioned below the blocking part 25 and respectively accommodates a code wheel 31, the first pin hole 2a is positioned on the side wall of one mounting groove 260, and the second pin hole 2b is positioned on the side wall of one mounting groove 260.

The periphery of the password wheel 31 is provided with a plurality of positioning grooves 3140, the lock body 2 is arranged in a positioning hole 230 corresponding to the positioning grooves 3140, and the positioning hole 230 contains a compression spring 34 and a positioning marble 33 which can be partially contained in the positioning grooves 3140.

The connecting pin hole 43c communicates with and is concentric with one positioning hole 230, the first pin hole 2a communicates with and is concentric with one positioning hole 230, and the connecting pin 401 communicates with and is concentric with the first pin hole 2a when the lock cylinder 41 is in the lock position or the unlock position.

A blocking part 25 is also arranged below the password wheel 31, the lock body 2 is provided with a long lock cavity for accommodating the long lock rod 11 and the clutch sleeve 32, the lock body 2 is fixedly provided with an end cover 26 which is sleeved outside the long lock rod 11 and used for covering the long lock cavity 270, the lower end of the lock core 41 is provided with a flange 413 which is abutted against the end surface of the lock core shell 42, the end cover 26 is provided with a lock positioning notch 261, the lock beam 1 is provided with a lock positioning bulge 113 corresponding to the position of the lock positioning notch 261, when the short lock rod 12 corresponds to the position of the lock hole 430, the lock positioning bulge 113 corresponds to the position of the lock positioning notch 261, the upper end of the inner peripheral surface of the password wheel 31 is provided with a convex ring 313, and the clutch notch 310 is arranged on the convex ring 313;

when the telescopic sleeve 43 is in the locking position, the lock beam 1 abuts against the bottom of the lock hole 430; when the telescopic sleeve 43 is at the unlocking position, the lug 321 is separated from the convex ring 313 when the lock beam 1 can move downwards when all the code wheels 31 are in correct positions respectively, and the code wheels 31 can rotate relative to the clutch sleeve; or, the end cap 26 is provided with a reset notch 262, the lock beam 1 moves up to be separated from the lock hole 430 and then can rotate to the reset position to enable the lock positioning protrusion 113 to correspond to the position of the reset notch 262, so that the lock beam 1 can move down to enable the convex block 321 to be separated from the convex ring 313, namely, the lock beam can completely separate from the clutch notch 310, the password wheel 31 can rotate relative to the clutch sleeve, at this time, the convex block 321 is limited in the unlocking notch, the convex block 321 can not rotate, a user can rotate the password wheel to modify the password, and after the modification is finished, the lock beam is advanced to enable the convex block 321 to be inserted into the clutch notch 310. The length of the projection 321 is relatively long, and when the lock beam 1 moves up and is unlocked, the projection 321 is still accommodated in the clutch notch 310, and the password cannot be reset.

In the invention, the section of the lock cylinder cavity 210 is circular, the lock cylinder shell 42 is in a circular tube shape, the lock cylinder shell 42 is provided with a lock cylinder pin hole 42a on the peripheral surface, the lock body 2 is provided with a first pin hole 2a corresponding to the positioning hole 230, the lock cylinder shell 42 and the lock body 2 are fixedly connected through a first pin 201 inserted into the lock cylinder pin hole 42a and the first pin hole 2a, the lock cylinder 41 is provided with a rotating groove 41b on the peripheral surface, the lock body 2 is provided with a second pin hole 2b corresponding to the rotating groove 41b and accommodating a second pin 202, and the second pin 202 penetrates through the lock cylinder shell 42 and is partially inserted into the rotating groove 41 b. The lock cylinder cavity 210 has a circular cross section, and the lock body 2 can be formed by machining a section bar as a blank.

In addition, the password wheel 31 assembly 3 of the present invention comprises a plurality of password wheels 31 with a plurality of engaging and disengaging notches 310 on the inner peripheral surface and a plurality of engaging and disengaging sleeves 32 which are respectively driven by one password wheel 31 to rotate and are sleeved on the outer peripheral surface of the long lock rod 11 and are provided with a projection 321, the projection 321 can be accommodated in the engaging and disengaging notches 310, and the lock body 2 is arranged above the password wheels 31.

The blocking part 25 is provided with an unlocking notch 250, the long lock rod 11 is rotatably connected with the clutch sleeve 32 and axially fixed, and the clutch sleeve 32 and the lock beam 1 have simple structures and are convenient to install.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.