1. An air compressor for preventing foot pad assembly deformation comprises an air storage tank (1), an air compressor head (2), a foot pad bracket (3), a foot pad (4), a bolt (5) and a locking nut (6); the air compressor head (2) is fixedly arranged on the air storage tank (1), and the upper end of the foot pad bracket (3) is fixedly connected with the air storage tank (1); the bolt is characterized in that the bolt (5) comprises a bolt head (51), a first column body (52) and a second column body (53), and two ends of the first column body (52) are respectively connected with the bolt head (51) and the second column body (53); the outer surface of the first cylinder (52) is not threaded, the outer surface of the second cylinder (53) is provided with external threads, and the diameter of the first cylinder (52) is larger than that of the second cylinder (53); both the foot pad support (3) and the foot pad (4) are provided with through bolt holes, the foot pad support (3) is also provided with a locking surface (31) which is attached to the inner surface of the locking nut (6), and the foot pad (4) is also provided with a pressing surface (41) which is attached to the inner surface of the bolt head (51); the first column body (52) penetrates through bolt holes of the foot pad support (3) and the foot pad (4) respectively, and the locking nut (6) is screwed to the tail end of the external thread of the second column body (53); the sum of the length of the first column (52) and the set compression thickness of the foot pad (4) is equal to the distance from the locking surface (31) to the pressing surface (41) when not locked.

2. The air compressor for preventing the foot pad from being assembled and deformed as claimed in claim 1, wherein the foot pad (4) is further provided with a foot pad groove (42), the bolt head (51) is positioned in the foot pad groove (42), and the pressing surface (41) is positioned on the bottom surface of the foot pad groove (42).

3. The air compressor for preventing the deformation of the foot pad during assembly according to claim 2, wherein the foot pad groove (42) is circular or square, and the center line of the foot pad groove (42) coincides with the center line of the bolt (5).

4. The air compressor for preventing the assembly deformation of the foot pad according to claim 2, wherein the height of the foot pad groove (42) is greater than that of the bolt head (51).

5. The air compressor for preventing the assembly deformation of the foot pad according to claim 1, wherein the bolt head (51) is formed in an outer hexagonal shape.

6. The air compressor for preventing the assembly deformation of the foot pad as set forth in claim 1, wherein the external thread of the second cylinder (53) is a coarse thread.

7. The air compressor for preventing the foot pad from being assembled and deformed as claimed in claim 1, wherein the air storage tank (1) is further fixedly provided with a wheel bracket (7), and a plurality of wheels (8) are rotatably arranged on the wheel bracket (7); the wheel bracket (7) comprises a bracket body (71), an upper attaching part (72), an upper unfolding part (73), a lower attaching part (74) and a lower unfolding part (75); the two upper attaching parts (72) are respectively positioned at two sides of the gas storage tank (1) and attached to the surface of the gas storage tank (1), and an included angle between the upper unfolding part (73) and the upper attaching parts (72) is 85-100 degrees; the lower attaching part (74) is attached to the outer surface of the lower part of the air storage tank (1), the two lower unfolding parts (75) are respectively positioned at two sides of the lower attaching part (74), and the included angle between the lower unfolding part (75) and the lower attaching part (74) is 90-110 degrees.

8. The air compressor for preventing the assembly deformation of the foot pad as claimed in claim 7, wherein the upper attaching portion (72) and the lower attaching portion (74) are fixedly connected with the air storage tank (1) by welding.

9. The air compressor for preventing the foot pad from being assembled and deformed as claimed in claim 7, wherein the wheel bracket (7) has a left-right symmetrical structure.

10. The air compressor for preventing the assembly deformation of the foot pad as claimed in claim 7, wherein a center line of the wheel bracket (7) in a left-right direction coincides with a center line of the air tank (1) in a left-right direction.

Background

An air compressor is a device for compressing air. The air compressor is constructed similarly to a water pump. Most air compressors are reciprocating piston type, rotating vane or rotating screw. An air compressor is a main body of an air source device, converts mechanical energy of a prime mover (usually an electric motor) into gas pressure energy, and is an air pressure generating device for compressing air.

The Chinese utility model patent application (publication No. CN211648413U, published: 20201009) discloses a portable air compressor with an offset machine head, which comprises an air storage tank, a machine head and a handle, wherein the machine head is installed above the air storage tank in an offset manner, and the gravity center of the machine head is positioned on one side of the axis of the air storage tank when the air compressor is lifted by the handle. According to the portable air compressor with the offset machine head, the machine head horizontally offsets to one side of the air storage tank or inclines to one side of the air storage tank, so that the gravity center of the air compressor is close to the body of a user, and bending moment to be overcome by shoulders when the air compressor is carried is reduced.

The prior art has the following defects: the foot pad is fixed on the bracket through a pair of bolts and locking nuts, and the bolts are full threads and are fixed by using a pneumatic gun during fastening, so that the strength and the screwing-in depth of the nuts cannot be controlled; thereby easily causing the foot pad to be extruded and deformed, resulting in material waste and low production efficiency.

Disclosure of Invention

The purpose of the invention is: to above-mentioned problem, it is spacing to set up the first cylinder that does not take the screw thread on the bolt to the locking position to provide, and then the compression volume of restriction callus on the sole, avoids the callus on the sole to be prevented the air compressor machine that callus on the sole assembly warp by extrusion deformation.

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

an air compressor for preventing foot pad assembly deformation comprises an air storage tank, an air compressor head, a foot pad bracket, a foot pad, a bolt and a locking nut; the air compressor head is fixedly arranged on the air storage tank, and the upper end of the foot pad bracket is fixedly connected with the air storage tank; the bolt comprises a bolt head, a first cylinder and a second cylinder, and two ends of the first cylinder are respectively connected with the bolt head and the second cylinder; the outer surface of the first cylinder is not threaded, the outer surface of the second cylinder is provided with external threads, and the diameter of the first cylinder is larger than that of the second cylinder; the foot pad support and the foot pad are provided with through bolt holes, the foot pad support is also provided with a locking surface attached to the inner surface of the locking nut, and the foot pad is also provided with a pressing surface attached to the inner surface of the bolt head; the first column body respectively penetrates through bolt holes of the foot pad bracket and the foot pad, and the locking nut is screwed to the tail end of the outer thread of the second column body; the sum of the length of the first column and the set compression thickness of the foot pad is equal to the distance from the locking surface to the pressing surface when the foot pad is not locked.

Preferably, the foot pad is further provided with a foot pad groove, the bolt head is located in the foot pad groove, and the pressing surface is located on the bottom surface of the foot pad groove. The foot pad groove is circular or square, and the center line of the foot pad groove coincides with the center line of the bolt. The height of the foot pad groove is greater than that of the bolt head. The bolt head is in an external hexagonal shape. The external thread of the second cylinder is a coarse thread.

Preferably, the air storage tank is also fixedly provided with a wheel bracket, and a plurality of wheels are rotatably arranged on the wheel bracket; the wheel bracket comprises a bracket body, an upper attaching part, an upper unfolding part, a lower attaching part and a lower unfolding part; the two upper attaching parts are respectively positioned at two sides of the gas storage tank and attached to the surface of the gas storage tank, and the included angle between the upper unfolding part and the upper attaching part is 85-100 degrees; the lower attaching part is attached to the outer surface below the gas storage tank, the two lower unfolding parts are respectively positioned at two sides of the lower attaching part, and the included angle between the lower unfolding part and the lower attaching part is 90-110 degrees.

Preferably, the upper attaching portion and the lower attaching portion are fixedly connected with the gas storage tank through a welding mode. The wheel bracket is in a bilateral symmetry structure. The center line of the left and right directions of the wheel bracket coincides with the center line of the left and right directions of the gas storage tank.

The air compressor adopting the technical scheme for preventing the foot pad from being assembled and deformed has the advantages that:

the outer surface of the first cylinder is not provided with threads, and the locking nut can only be screwed to the tail end of the threads outside the second cylinder, namely the locking position of the locking nut is limited by the first cylinder; the set compression thickness of the foot pad is equal to the distance between the locking surface and the pressing surface when the foot pad is not locked minus the length of the first column body, namely the compression thickness of the foot pad can be controlled by controlling the length of the first column body; thereby avoiding the situation that the compression thickness of the foot pad can not control the occurrence of extrusion deformation, and further ensuring that the foot pad is not damaged.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of a foot pad bracket, a foot pad, a bolt and a lock nut combination.

Fig. 3 is a schematic structural view of the wheel carriage.

76-the angle between the upper unfolding portion and the upper attaching portion, and 77-the angle between the lower unfolding portion and the lower attaching portion.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings.

Example 1

As shown in fig. 1 and 2, the air compressor for preventing foot pad assembly deformation comprises an air storage tank 1, an air compressor head 2, a foot pad bracket 3, a foot pad 4, a bolt 5 and a lock nut 6; the air compressor head 2 is fixedly arranged on the air storage tank 1, and the upper end of the foot pad bracket 3 is fixedly connected with the air storage tank 1; the bolt 5 comprises a bolt head 51, a first column body 52 and a second column body 53, wherein two ends of the first column body 52 are respectively connected with the bolt head 51 and the second column body 53; the outer surface of the first cylinder 52 is not threaded, the outer surface of the second cylinder 53 is provided with external threads, and the diameter of the first cylinder 52 is larger than that of the second cylinder 53; both the foot pad support 3 and the foot pad 4 are provided with through bolt holes, the foot pad support 3 is also provided with a locking surface 31 attached to the inner surface of the locking nut 6, and the foot pad 4 is also provided with a pressing surface 41 attached to the inner surface of the bolt head 51; the first column 52 penetrates through bolt holes of the foot pad bracket 3 and the foot pad 4 respectively, and the locking nut 6 is screwed to the tail end of the external thread of the second column 53; the sum of the length of the first post 52 and the set compressed thickness of the footpad 4 is equal to the distance from the locking surface 31 to the compression surface 41 when unlocked. In this way, the outer surface of the first cylinder 52 has no threads, and the lock nut 6 can only be screwed on the end of the outer threads of the second cylinder 53, i.e. the locking position of the lock nut 6 is limited by the first cylinder 52; the set compression thickness of the foot pad 4 is equal to the distance from the locking surface 31 to the pressing surface 41 when the foot pad is not locked minus the length of the first column 52, namely the compression thickness of the foot pad 4 can be controlled by controlling the length of the first column 52; thereby avoiding the situation that the compression thickness of the foot pad 4 can not control the occurrence of extrusion deformation, and further ensuring that the foot pad 4 is not damaged.

The foot pad 4 is further provided with a foot pad groove 42, the bolt head 51 is positioned in the foot pad groove 42, and the pressing surface 41 is positioned on the bottom surface of the foot pad groove 42. The foot pad groove 42 is circular or square, and the center line of the foot pad groove 42 coincides with the center line of the bolt 5. The height of the foot pad groove 42 is greater than the height of the bolt head 51. The bolt head 51 has an outer hexagonal shape. The external threads of the second post 53 are coarse threads.

As shown in fig. 3, the air storage tank 1 is further fixedly provided with a wheel bracket 7, and a plurality of wheels 8 are rotatably arranged on the wheel bracket 7; the wheel bracket 7 includes a bracket body 71, an upper attaching portion 72, an upper expanding portion 73, a lower attaching portion 74, and a lower expanding portion 75; the two upper attaching parts 72 are respectively positioned at two sides of the gas storage tank 1 and attached to the surface of the gas storage tank 1, and the included angle between the upper unfolding part 73 and the upper attaching parts 72 is 85-100 degrees; the lower attaching portion 74 is attached to the outer surface of the lower portion of the gas storage tank 1, the two lower extending portions 75 are located on two sides of the lower attaching portion 74, and an included angle between the lower extending portions 75 and the lower attaching portion 74 is 90-110 degrees. The included angle between the upper unfolding part 73 and the upper attaching part 72 is 85-100 degrees, the included angle between the lower unfolding part 75 and the lower attaching part 74 is 90-110 degrees, namely, the upper unfolding part 73 and the lower unfolding part 75 are turned outwards relative to the surface of the air storage tank 1 to eliminate dead angles; therefore, large spaces are reserved between the upper attaching portion 72 and the air storage tank 1 and between the lower attaching portion 74 and the air storage tank 1, the powder spraying gun head can enter the large space to uniformly spray powder on the surface of the air storage tank 1, and all-directional spraying of the air storage tank 1 is guaranteed.

The upper attaching portion 72 and the lower attaching portion 74 are fixedly connected to the gas container 1 by welding. The wheel support 7 is of a bilateral symmetry structure. The center line of the wheel bracket 7 in the left-right direction coincides with the center line of the gas tank 1 in the left-right direction.