1. An adjustable mechanical clamp, comprising:

a base (1);

a splint (2); the number of the clamping plates (2) is two, and the clamping plates are parallel to each other and are symmetrically connected to the top surface of the base (1) in a sliding manner; unit grooves (21) which are arranged in a matrix manner are formed on the corresponding surfaces of the two clamping plates (2); a pressure sensing chip (22) is arranged on the inner bottom wall of the unit groove (21); a unit sliding block (23) is connected in the unit groove (21) in a sliding manner; one end of the unit sliding block (23) is positioned in the unit groove (21) and is fixedly connected with the inner bottom wall of the unit groove (21) through a spring (24), and the other end of the unit sliding block (23) is positioned outside the unit groove (21);

a linear displacement drive mechanism (3); the number of the linear displacement driving mechanisms (3) is two, and the two linear displacement driving mechanisms (3) are both arranged on the base (1) and are respectively connected with the two clamping plates (2); the two linear displacement driving mechanisms (3) are used for driving the two clamping plates (2) to move close to and apart from each other;

a computer (4); the computer (4) is respectively and electrically connected with the signal output end of the pressure sensing chip (22) and the control end of the linear displacement driving mechanism (3); and is used for displaying the clamping range and the clamping force on the clamping plate (2) and adjusting the linear displacement driving mechanism (3).

2. An adjustable mechanical clamp according to claim 1, wherein said linear displacement drive mechanism (3) comprises a servo motor (31) and a lead screw (32); the middle part of the base (1) is provided with a sliding chute (11) which is vertical to the clamping plate (2); the clamping plate (2) is provided with a sliding plate (25) which penetrates through the sliding chute (11) and extends to the lower part of the bottom surface of the base (1), and the sliding plate (25) is connected with the sliding chute (11) in a sliding way; the servo motor (31) is fixed on the bottom surface of the base (1), and the control end of the servo motor (31) is electrically connected with the computer (4); one end of the screw rod (32) is connected with a power output shaft of the servo motor (31), and the other end of the screw rod is in threaded connection with the sliding plate (25).

3. An adjustable mechanical clamp according to claim 2, wherein said linear displacement drive mechanism (3) further comprises a guide frame (33) and a guide rod (34); the guide frame (33) is fixed on the top surface of the base (1), stretches across the sliding groove (11), and is positioned on the other side of the corresponding surface of the clamping plate (2); the quantity of guide bar (34) is two, and symmetrical arrangement is in splint (2) both sides, guide bar (34) one end with splint (2) face fixed connection, the other end with leading truck (33) sliding connection.

4. An adjustable mechanical clamp according to claim 2 or 3, wherein said linear displacement drive mechanism (3) further comprises a support block (35); the supporting block (35) is fixed in the middle of the bottom surface of the base (1) and is rotatably connected with one end, far away from the servo motor (31), of the lead screw (32).

5. The adjustable mechanical clamp according to claim 4, wherein a rubber block (26) is fixed at the end of the unit sliding block (23) positioned in the unit groove (21); the rubber block (26) is positioned inside the spring (24) and corresponds to the pressure sensing chip (22).

6. The adjustable mechanical clamp according to claim 5, wherein the clamping plate (2) is rectangular, and the unit groove (21) and the unit sliding block (23) are square in cross section.

7. The adjustable mechanical clamp according to claim 6, wherein the plurality of unit sliders (23) form an 8 x 20 matrix arrangement.

8. An adjustable mechanical clamp according to claim 6 or 7, wherein the display screen of the computer (4) comprises two real-time display units (41) and a difference display unit (42); the real-time display unit (41) and the difference value display unit (42) are both composed of unit grids which have the same number with the unit sliding blocks (23) and are arranged in the same mode; the two real-time display units (41) are used for correspondingly displaying the detection values of the pressure sensing chips (22) on the two splints (2), and the difference value display unit (42) is used for displaying the difference value of the corresponding cells on the two real-time display units (41).

9. The adjustable mechanical clamp according to claim 8, wherein when the cells on the two real-time display units (41) display numerical values, the corresponding cells have color display; the overlapped cells of the two real-time display units (41) corresponding to the difference value display unit (42) have color display; the cell numerical values on the difference display unit (42) are graded from small to large and are displayed by different colors.

10. An adjustable mechanical clamp according to claim 8, further comprising a servo motor control unit (43) on said display screen; the servo motor control unit (43) can perform parameter setting and automatic driving, and can perform manual regulation control on the positive and negative rotation and the rotation number of the servo motor (31).

Background

The machine is also called a fixture, which is used to fix the object to be processed to make it occupy the correct position for receiving construction or detection. In a broad sense, any device used to quickly, conveniently and safely mount a workpiece at any stage in a process may be referred to as a jig. Such as welding jigs, inspection jigs, assembly jigs, machine tool jigs, and the like. Among them, the machine tool clamp is the most common, and is often referred to as a clamp for short. When a workpiece is machined on a machine tool, the surface of the workpiece can meet the technical requirements of the size, the geometric shape, the mutual position precision with other surfaces and the like specified in the drawing.

However, the existing clamps on the market are complex in structure, expensive to manufacture, and single in function, and generally only can clamp a certain part, so that the application range of the clamp is extremely low, and the existing clamps cannot clamp the workpiece according to the hardness of the workpiece, so that when clamping the workpiece with low hardness, the clamp clamping force is not easy to control, the workpiece is easy to deform during clamping, and the clamping effect and the application performance of the clamp are affected. What is more critical is that, along with the requirement for machining precision is higher and higher, if the clamp cannot guarantee that the clamping force of bilateral symmetry is consistent when clamping, not only can influence the part, also can produce the deviation of machining precision.

Therefore, it is an urgent need to solve the problem of the art to provide a mechanical clamp with strong versatility, which is beneficial to improving the machining precision and can be adjusted according to the clamping force.

Disclosure of Invention

In view of the above, the present invention provides an adjustable mechanical fixture, which aims to solve the above technical problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

an adjustable mechanical clamp comprising:

a base;

a splint; the number of the clamping plates is two, and the clamping plates are parallel to each other and are symmetrically connected to the top surface of the base in a sliding manner; unit grooves which are arranged in a matrix manner are formed on the corresponding surfaces of the two clamping plates; a pressure sensing chip is arranged on the inner bottom wall of each unit groove; the unit grooves are connected with unit sliding blocks in a sliding mode; one end of the unit sliding block is positioned in the unit groove and is fixedly connected with the inner bottom wall of the unit groove through a spring, and the other end of the unit sliding block is positioned outside the unit groove;

a linear displacement drive mechanism; the number of the linear displacement driving mechanisms is two, and the two linear displacement driving mechanisms are both arranged on the base and are respectively connected with the two clamping plates; the two linear displacement driving mechanisms are used for driving the two clamping plates to move close to and away from each other;

a computer; the computer is respectively and electrically connected with the signal output end of the pressure sensing chip and the control end of the linear displacement driving mechanism; and is used for displaying the clamping range and the clamping force on the clamping plate and adjusting the linear displacement driving mechanism.

Through the technical scheme, the clamping plate provided by the invention is provided with the unit sliding block capable of elastically stretching, so that parts with different shapes and sizes can be adaptively limited and clamped, and the stability is higher; through the acquisition control clamp force to pressure data, carry out the symmetry through the contrast to the clamping range of two splint and clamp force and adjust, guarantee that the clamping range and the power of both sides are unanimous, improve clamping stability, further improve the machining precision.

Preferably, in the above adjustable mechanical clamp, the linear displacement driving mechanism includes a servo motor and a lead screw; the middle part of the base is provided with a sliding chute vertical to the clamping plate; the clamping plate is provided with a sliding plate which penetrates through the sliding groove and extends to the lower part of the bottom surface of the base, and the sliding plate is connected with the sliding groove in a sliding manner; the servo motor is fixed on the bottom surface of the base, and the control end of the servo motor is electrically connected with the computer; one end of the screw rod is connected with a power output shaft of the servo motor, and the other end of the screw rod is in threaded connection with the sliding plate. Through the drive of lead screw structure, can become the rotation of motor linear motion.

Preferably, in the above adjustable mechanical clamp, the linear displacement driving mechanism further includes a guide frame and a guide rod; the guide frame is fixed on the top surface of the base, spans the sliding groove and is positioned on the other side of the corresponding surface of the clamping plate; the quantity of guide bar is two, and symmetrical arrangement is in splint both sides, guide bar one end with splint face fixed connection, the other end with leading truck sliding connection. Further improving the stability of the operation of the splint.

Preferably, in the above adjustable mechanical clamp, the linear displacement driving mechanism further includes a support block; the supporting block is fixed in the middle of the bottom surface of the base and is rotatably connected with one end, far away from the servo motor, of the screw rod. Further improving the stability of the rotation of the lead screw.

Preferably, in the above adjustable mechanical clamp, a rubber block is fixed to an end of the unit slider located in the unit groove; the rubber block is located inside the spring and corresponds to the pressure sensing chip. Prevent hard damage and has good buffer function.

Preferably, in the above adjustable mechanical clamp, the clamping plate is rectangular, and the cross sections of the unit groove and the unit slider are both square. And data statistics are facilitated.

Preferably, in the above adjustable mechanical clamp, the plurality of unit blocks form an 8 × 20 matrix arrangement. Can meet the use requirement.

Preferably, in the above adjustable mechanical clamp, the display screen of the computer includes two real-time display units and a difference display unit; the real-time display unit and the difference value display unit are both composed of unit grids which have the same number with the unit sliding blocks and are arranged in the same mode; the two real-time display units respectively and correspondingly display the detection values of the pressure sensing chips on the two clamping plates, and the difference value display unit is used for displaying the difference value of the corresponding cells on the two real-time display units. The adjustable clamp for machinery provided by the invention has an intelligent matrix real-time statistical display function, can display the contact range and the contact force with a part in real time during clamping, and can compare the clamping force on two sides so as to further adjust the clamp.

Preferably, in the above adjustable mechanical fixture, when the cells on the two real-time display units display numerical values, the cells have color displays correspondingly; the overlapped cells of the two real-time display units corresponding to the difference display unit have color display; and the cell numerical values on the difference display unit are graded from small to large and are displayed by different colors. The display effect is more intuitive.

Preferably, in the above adjustable mechanical fixture, the display screen further includes a servo motor control unit; the servo motor control unit can set parameters and automatically drive, and manually adjust and control the positive and negative rotation and the revolution of the servo motor. The control and adjustment are convenient, and the further improvement of the precision is facilitated.

According to the technical scheme, compared with the prior art, the adjustable mechanical clamp disclosed by the invention has the following beneficial effects that:

1. the clamping plate provided by the invention is provided with the unit sliding block which can elastically stretch out and draw back, so that parts with different shapes and sizes can be subjected to adaptive limiting clamping, and the stability is higher; through the acquisition control clamp force to pressure data, carry out the symmetry through the contrast to the clamping range of two splint and clamp force and adjust, guarantee that the clamping range and the power of both sides are unanimous, improve clamping stability, further improve the machining precision.

2. The adjustable clamp for machinery provided by the invention has an intelligent matrix real-time statistical display function, can display the contact range and the contact force with a part in real time during clamping, and can compare the clamping force on two sides so as to further adjust the clamp.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of an adjustable mechanical clamp according to the present invention;

FIG. 2 is a top view of an adjustable mechanical clamp according to the present invention;

FIG. 3 is a front view of an adjustable mechanical clamp according to the present invention;

FIG. 4 is a cross-sectional view of a splint according to the present invention;

fig. 5 is a schematic display diagram of a display screen of a computer provided by the invention.

Wherein:

1-a base;

11-a chute;

2-clamping plate;

21-unit cell; 22-a pressure sensing chip; 23-unit slider; 24-a spring; 25-a slide plate; 26-a rubber block;

3-a linear displacement drive mechanism;

31-a servo motor; 32-a lead screw; 33-a guide frame; 34-a guide bar; 35-a support block;

4-a computer;

41-real-time display unit; 42-a difference display unit; 43-servo motor control unit.

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.

Referring to fig. 1 to 5, an embodiment of the present invention discloses an adjustable mechanical clamp, including:

a base 1;

a splint 2; the number of the clamping plates 2 is two, and the clamping plates are parallel to each other and are symmetrically connected on the top surface of the base 1 in a sliding manner; unit grooves 21 which are arranged in a matrix form are formed on the corresponding surfaces of the two clamping plates 2; a pressure sensing chip 22 is installed on the inner bottom wall of the unit groove 21; a unit sliding block 23 is connected in the unit groove 21 in a sliding manner; one end of the unit sliding block 23 is positioned in the unit groove 21 and is fixedly connected with the inner bottom wall of the unit groove 21 through a spring 24, and the other end of the unit sliding block 23 is positioned outside the unit groove 21;

a linear displacement drive mechanism 3; the number of the linear displacement driving mechanisms 3 is two, and the two linear displacement driving mechanisms 3 are both arranged on the base 1 and are respectively connected with the two clamping plates 2; the two linear displacement driving mechanisms 3 are used for driving the two clamping plates 2 to move close to and apart from each other;

a computer 4; the computer 4 is respectively electrically connected with the signal output end of the pressure sensing chip 22 and the control end of the linear displacement driving mechanism 3; and is used to display the clamping range and clamping force on the clamping plate 2, as well as the adjustment of the linear displacement drive 3.

In order to further optimize the above technical solution, the linear displacement driving mechanism 3 comprises a servo motor 31 and a lead screw 32; the middle part of the base 1 is provided with a sliding chute 11 which is vertical to the clamping plate 2; the splint 2 is provided with a sliding plate 25 which penetrates through the sliding chute 11 and extends to the lower part of the bottom surface of the base 1, and the sliding plate 25 is connected with the sliding chute 11 in a sliding way; the servo motor 31 is fixed on the bottom surface of the base 1, and the control end of the servo motor 31 is electrically connected with the computer 4; one end of the screw rod 32 is connected with the power output shaft of the servo motor 31, and the other end is in threaded connection with the sliding plate 25.

In order to further optimize the above technical solution, the linear displacement driving mechanism 3 further comprises a guide frame 33 and a guide rod 34; the guide frame 33 is fixed on the top surface of the base 1, spans the chute 11 and is positioned on the other side of the corresponding surface of the clamping plate 2; the quantity of guide bar 34 is two, and symmetrical arrangement is in splint 2 both sides, and guide bar 34 one end and splint 2 face fixed connection, the other end and leading truck 33 sliding connection.

In order to further optimize the above technical solution, the linear displacement driving mechanism 3 further comprises a supporting block 35; the supporting block 35 is fixed in the middle of the bottom surface of the base 1 and is rotatably connected with one end of the screw rod 32 far away from the servo motor 31.

In order to further optimize the technical scheme, a rubber block 26 is fixed at the end of the unit sliding block 23 positioned in the unit groove 21; the rubber block 26 is located inside the spring 24 and corresponds to the pressure sensing chip 22.

In order to further optimize the technical scheme, the clamping plate 2 is rectangular, and the cross sections of the unit groove 21 and the unit sliding block 23 are both square.

In order to further optimize the above technical solution, the plurality of unit sliders 23 form an 8 × 20 matrix arrangement.

In order to further optimize the above technical solution, the display screen of the computer 4 comprises two real-time display units 41 and a difference display unit 42; the real-time display unit 41 and the difference display unit 42 are both composed of cells with the same number and the same arrangement mode as the unit sliding blocks 23; the two real-time display units 41 respectively and correspondingly display the detection values of the pressure sensing chips 22 on the two splints 2, and the difference display unit 42 is configured to display the difference of the corresponding cells on the two real-time display units 41.

In order to further optimize the above technical solution, when the cells on the two real-time display units 41 display numerical values, the corresponding color display is provided; the overlapped cells of the two real-time display units 41 corresponding to the difference display unit 42 have color display; the cell values on the difference display unit 42 are graded from small to large in multiple stages and displayed in different colors.

In order to further optimize the above technical solution, the display screen further comprises a servo motor control unit 43; the servo motor control unit 43 is capable of performing parameter setting and automatic driving, and manual regulation control of the forward and reverse rotation and the number of rotations of the servo motor 31.

Part centre gripping is between two splint 2, because unit slider 23 can be carried out along with the shape extrusion by the part, and the unit slider 23 that does not extrude can carry on spacingly to the part, and the stability of centre gripping is stronger. Because the pressure after the centre gripping can show on the display screen, therefore the scope of centre gripping can be disclosed directly perceivedly, and in addition, the pressure and the pressure differential of both sides all can show in real time, are favorable to guaranteeing the precision of centre gripping, have good effect to promoting the part machining precision.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.