An air compressor that prevents the foot pad from being deformed during assembly

Abstract

The present invention relates to the field of air compressors, and particularly to an air compressor that prevents the assembly of foot pads from deforming. The air compressor includes an air storage tank, an air compressor head, a foot pad bracket, a foot pad, a bolt, and a lock nut; the bolt includes a bolt head, a first cylinder, and a second cylinder. The outer surface of the first cylinder has no thread, and the outer surface of the second cylinder is provided with an external thread; both the foot pad bracket and the foot pad are provided with through bolt holes. The foot pad bracket is further provided with a locking surface that fits the inner surface of the lock nut, and the foot pad is further provided with a pressing surface that fits the inner surface of the bolt head; the first cylinder passes through the bolt holes of the foot pad bracket and the foot pad respectively, and the lock nut is screwed to the end of the external thread of the second cylinder; the sum of the length of the first cylinder and the set compression thickness of the foot pad is equal to the distance from the locking surface to the pressing surface when not locked. The air compressor is provided with a first cylinder without a thread on the lock nut to limit the locking position, thereby restricting the compression amount of the foot pad and avoiding the foot pad from being torn and deformed.

Description

Technical Field

[0001] The present invention relates to the field of air compressors, and particularly to an air compressor that prevents the foot pad from being deformed during assembly. Background Art

[0002] An air compressor is a device used to compress gas. The air compressor is similar in structure to a water pump. Most air compressors are reciprocating piston type, rotary vane or rotary screw type. The air compressor is the main body in the air source device. It converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy and is a pneumatic pressure generating device for compressed air.

[0003] The Chinese Utility Model Patent Application (Publication No. CN211648413U, Publication Date: 20201009) discloses a hand-held air compressor with an offset head, which includes an air storage tank, a head and a handle. The head is offset and installed above the air storage tank. When the air compressor is lifted by the handle, the center of gravity of the head is on one side of the axis of the air storage tank. In this hand-held air compressor with an offset head, the head is horizontally offset towards the air storage tank or the head is inclined towards the air storage tank, so that the center of gravity of the air compressor is close to the user's body, thereby reducing the bending moment that the shoulder needs to overcome when carrying the air compressor.

[0004] The prior art has the following deficiencies: The foot pad is fixed to the bracket by a pair of bolts and lock nuts. Since the bolts are full-threaded and a pneumatic gun is used for tightening during fixation, it is impossible to control the magnitude of the force and the screwing depth of the nut; as a result, the foot pad is easily squeezed and deformed, leading to material waste and low production efficiency. Summary of the Invention

[0005] The purpose of the present invention is: In view of the above problems, an air compressor that prevents the foot pad from being deformed during assembly is proposed, in which a first column without threads is provided on the bolt to limit the locking position, thereby restricting the compression amount of the foot pad and avoiding the foot pad from being squeezed and deformed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An air compressor for preventing the deformation of the foot pad during assembly, the air compressor comprising 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 the two ends of the first cylinder are respectively connected with the bolt head and the second cylinder; the outer surface of the first cylinder has no thread, the outer surface of the second cylinder is provided with an external thread, and the diameter of the first cylinder is greater than that of the second cylinder; both the foot pad bracket and the foot pad are provided with through bolt holes, the foot pad bracket is further provided with a locking surface that fits with the inner surface of the locking nut, and the foot pad is further provided with a pressing surface that fits with the inner surface of the bolt head; the first cylinder respectively passes through the bolt holes of the foot pad bracket and the foot pad, and the locking nut is screwed to the end of the external thread of the second cylinder; the sum of the length of the first cylinder and the set compression thickness of the foot pad is equal to the distance from the locking surface to the pressing surface when not locked.

[0008] 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 at 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 the height of the bolt head. The bolt head is in the shape of an external hexagon. The external thread of the second cylinder is a coarse thread.

[0009] Preferably, the air storage tank is further 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 fitting part, an upper unfolding part, a lower fitting part and a lower unfolding part; the two upper fitting parts are respectively located on both sides of the air storage tank and fit with the surface of the air storage tank, and the included angle between the upper unfolding part and the upper fitting part is 85-100°; the lower fitting part fits with the outer surface below the air storage tank, the two lower unfolding parts are respectively located on both sides of the lower fitting part, and the included angle between the lower unfolding part and the lower fitting part is 90-110°.

[0010] Preferably, both the upper fitting part and the lower fitting part are fixedly connected with the air storage tank by welding. The wheel bracket is a left-right symmetric structure. The center line of the wheel bracket in the left-right direction coincides with the center line of the air storage tank in the left-right direction.

[0011] The advantages of an air compressor for preventing the deformation of the foot pad during assembly adopting the above technical solution of the present invention are as follows:

[0012] There is no thread on the outer surface of the first cylinder, and the locking nut can only be screwed to the end of the external thread of the second cylinder, that is, 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 from the locking surface to the pressing surface when not locked minus the length of the first cylinder, that is, the compression thickness of the foot pad can be controlled by controlling the length of the first cylinder; thus, the situation of extrusion deformation caused by the uncontrollable compression thickness of the foot pad is avoided, and further damage to the foot pad is ensured. Description of the Drawings

[0013] Figure 1 This is a structural schematic diagram of the present invention.

[0014] Figure 2 This is a structural schematic diagram of the combination of the footpad bracket, footpad, bolt, and locking nut.

[0015] Figure 3 This is a structural schematic diagram of the wheel bracket.

[0016] 76 - The angle between the upper expansion part and the upper fitting part, 77 - The angle between the lower expansion part and the lower fitting part. Detailed Embodiment

[0017] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings.

[0018] Embodiment 1

[0019] As Figure 1 , Figure 2 shown, an air compressor for preventing deformation during footpad assembly, the air compressor includes an air storage tank 1, an air compressor head 2, a footpad bracket 3, a footpad 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 footpad bracket 3 is fixedly connected to the air storage tank 1; the bolt 5 includes a bolt head 51, a first cylinder 52, and a second cylinder 53, and the two ends of the first cylinder 52 are respectively connected to the bolt head 51 and the second cylinder 53; the outer surface of the first cylinder 52 has no thread, the outer surface of the second cylinder 53 is provided with an external thread, and the diameter of the first cylinder 52 is larger than the diameter of the second cylinder 53; both the footpad bracket 3 and the footpad 4 are provided with through bolt holes, the footpad bracket 3 is further provided with a locking surface 31 that fits with the inner surface of the locking nut 6, and the footpad 4 is further provided with a pressing surface 41 that fits with the inner surface of the bolt head 51; the first cylinder 52 respectively passes through the bolt holes of the footpad bracket 3 and the footpad 4, and the locking nut 6 is screwed to the end of the external thread of the second cylinder 53; the sum of the length of the first cylinder 52 and the set compression thickness of the footpad 4 is equal to the distance from the locking surface 31 to the pressing surface 41 when not locked. In this way, there is no thread on the outer surface of the first cylinder 52, and the locking nut 6 can only be screwed to the end of the external thread of the second cylinder 53, that is, the locking position of the locking nut 6 is limited by the first cylinder 52; the set compression thickness of the footpad 4 is equal to the distance from the locking surface 31 to the pressing surface 41 when not locked minus the length of the first cylinder 52, that is, by controlling the length of the first cylinder 52, the compression thickness of the footpad 4 can be controlled; thus, the situation of extrusion deformation caused by the uncontrollable compression thickness of the footpad 4 is avoided, and further damage to the footpad 4 is ensured.

[0020] The foot pad 4 is also provided with a foot pad groove 42, the bolt head 51 is located in the foot pad groove 42, and the pressing surface 41 is located at 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 is in an external hexagonal shape. The external thread of the second column 53 is a coarse thread.

[0021] like Figure 3 As shown, the gas tank 1 is also fixedly provided with a wheel bracket 7, on which a plurality of wheels 8 are rotatably provided; the wheel bracket 7 comprises a bracket body 71, an upper fitting portion 72, an upper unfolding portion 73, a lower fitting portion 74 and a lower unfolding portion 75; the two upper fitting portions 72 are respectively located on both sides of the gas tank 1 and fit with the surface of the gas tank 1, and the angle between the upper unfolding portion 73 and the upper fitting portion 72 is 85-100°; the lower fitting portion 74 fits with the lower outer surface of the gas tank 1, and the two lower unfolding portions 75 are respectively located on both sides of the lower fitting portion 74, and the angle between the lower unfolding portion 75 and the lower fitting portion 74 is 90-110°. The angle between the upper expansion portion 73 and the upper fitting portion 72 is 85-100°, and the angle between the lower expansion portion 75 and the lower fitting portion 74 is 90-110°, that is, the upper expansion portion 73 and the lower expansion portion 75 are both turned outward relative to the surface of the gas tank 1 to eliminate dead angles; thereby, there is a large space between the upper fitting portion 72 and the gas tank 1, and between the lower fitting portion 74 and the gas tank 1, and the powder spray gun head can enter the large space to evenly spray powder on the surface of the gas tank 1, ensuring that the gas tank 1 is sprayed in all directions.

[0022] The upper fitting portion 72 and the lower fitting portion 74 are both fixedly connected to the gas storage tank 1 by welding. The wheel bracket 7 is a bilaterally symmetrical structure. The center line of the wheel bracket 7 in the left-right direction coincides with the center line of the gas storage tank 1 in the left-right direction.

Claims

1. An air compressor for preventing the deformation of foot pad assembly, the air compressor includes 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); It is characterized in that, The bolt (5) includes a bolt head (51), a first cylinder (52) and a second cylinder (53), and both ends of the first cylinder (52) are respectively connected with the bolt head (51) and the second cylinder (53); the outer surface of the first cylinder (52) has no thread, the outer surface of the second cylinder (53) is provided with an external thread, and the diameter of the first cylinder (52) is larger than the diameter of the second cylinder (53); both the foot pad bracket (3) and the foot pad (4) are provided with through bolt holes, the foot pad bracket (3) is further provided with a locking surface (31) that fits with the inner surface of the lock nut (6), and the foot pad (4) is further provided with a pressing surface (41) that fits with the inner surface of the bolt head (51); the first cylinder (52) respectively passes through the bolt holes of the foot pad bracket (3) and the foot pad (4), and the lock nut (6) is screwed to the end of the external thread of the second cylinder (53); the sum of the length of the first cylinder (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; 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 fitting part (72), an upper expansion part (73), a lower fitting part (74) and a lower expansion part (75); the two upper fitting parts (72) are respectively located on both sides of the air storage tank (1) and fit with the surface of the air storage tank (1), and the included angle between the upper expansion part (73) and the upper fitting part (72) is 85 - 100°; the lower fitting part (74) fits with the outer surface below the air storage tank (1), the two lower expansion parts (75) are respectively located on both sides of the lower fitting part (74), and the included angle between the lower expansion part (75) and the lower fitting part (74) is 90 - 110°; The upper fitting part (72) and the lower fitting part (74) are both fixedly connected with the air storage tank (1) by welding; the wheel bracket (7) is a left - right symmetric structure.

2. The air compressor for preventing the deformation of foot pad assembly according to claim 1, It is characterized in that, The foot pad (4) is further provided with a foot pad groove (42), the bolt head (51) is located in the foot pad groove (42), and the pressing surface (41) is located at the bottom surface of the foot pad groove (42).

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

5. The air compressor for preventing the deformation of foot pad assembly according to claim 1, It is characterized in that, The bolt head (51) is in the shape of an external hexagon.

6. The air compressor for preventing the foot pad from being deformed during assembly according to claim 1, characterized in that, the external thread of the second cylinder body (53) is a coarse thread.

7. The air compressor for preventing the foot pad from being deformed during assembly according to claim 1, characterized in that, the center line of the wheel bracket (7) in the left - right direction coincides with the center line of the air storage tank (1) in the left - right direction.

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