A mobile air compressor

Abstract

The present invention discloses a mobile air compressor. By arranging an inclined portion on the second bracket of the shelving assembly, and arranging a sliding seat, an auxiliary wheel, a limit block and an elastic component on the inclined portion, the auxiliary wheel is lower than the rubber buffer pad after sliding under the action of gravity, so as to facilitate the movement of the air compressor body. In combination with the downward pressing assembly on the second bracket, the elastic rotating mechanism at the connection between the push handle and the tank body, and the linkage mechanism, when the push handle is pressed downward, the limit block can be separated from the limit square hole, so that the rubber buffer pad is supported on the ground again. Finally, in the process of lifting the push handle upward to raise the rear end of the air compressor body, the auxiliary wheel is supported on the ground and the rubber buffer pad is off the ground, so as to facilitate the movement of the air compressor body; in the process of pressing the push handle downward, the auxiliary wheel is reset and the rubber buffer pad is supported on the ground, so as to facilitate the fixing of the air compressor body.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressors, and in particular to a mobile air compressor. Background Art

[0002] Air compressor (full name: air compressor) can compress air to a high pressure state, making it have a higher energy density, and release it when needed. It is widely used in power transmission, industrial production, gas supply and other fields.

[0003] Among them, the mobile air compressor has the feature of being convenient to move to a different position for use by setting rollers and a push handle. For example, the Chinese patent with the authorization announcement number CN215370172U and the authorization announcement date of December 31, 2021 discloses "An Air Compressor", and the drawings in its specification disclose structures such as a roller assembly, a push handle, and a shelf assembly. When the push handle is lifted upward to lift the shelf assembly of the air compressor off the ground, the air compressor can be pushed to move to a different position.

[0004] However, in the above patent, the function of the shelf assembly is to place the air compressor on the ground after it moves to the desired position to increase the friction with the ground, so that the air compressor remains fixed. However, the existence of the shelf assembly requires one end of the air compressor to be lifted upwards in order to push the air compressor, which makes it more laborious to push the air compressor. There are also air compressors that do not have the shelf assembly, but instead have two sets of roller assemblies with brake functions. However, the brake function needs to be released or turned on before and after the movement, which is inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to provide a mobile air compressor, which can facilitate the movement and fixation of the air compressor body.

[0006] The above technical object of the present invention is achieved by the following technical solutions: A mobile air compressor, comprising an air compressor body with a tank at the bottom, a roller assembly arranged at the front end of the bottom of the tank, a resting assembly arranged at the rear end of the bottom of the tank, and a pusher arranged at the rear end of the tank. The roller assembly includes a first bracket arranged at the front end of the bottom of the tank and main rollers arranged at both ends of the first bracket; the resting assembly includes a second bracket arranged at the rear end of the bottom of the tank and a rubber buffer pad arranged at the middle of the bottom of the second bracket. When the lowest ends of the main rollers and the rubber buffer pad support on the ground, the tank is in a horizontal state; the second bracket is in a "U" shape, and both ends of the bottom of the second bracket are provided with inclined parts extending obliquely upward in the direction close to the rear end of the tank. A limiting square hole is arranged at the lower end of the inclined part. A sliding seat is slidably connected to the bottom of the inclined part, and an auxiliary wheel is rotatably connected below the sliding seat. A limiting block matching the limiting square hole is telescopically arranged on the upper surface of the sliding seat. An elastic component for driving the limiting block to move upward is arranged between the sliding seat and the limiting block; when the pusher lifts the rear end of the air compressor body upward so that the rubber buffer pad leaves the ground, the sliding seat slides downward under the action of gravity to overcome the friction between the limiting block and the inclined part to the position where the limiting block corresponds to the limiting square hole. The limiting block is embedded in the limiting square hole under the action of the elastic component, and the lowest end height of the auxiliary wheel is lower than the lowest end height of the rubber buffer pad. When the pusher is released and the main rollers and the auxiliary wheels support on the ground, the rubber buffer pad leaves the ground and the front end of the tank is inclined downward; lifting seats are respectively arranged on both sides of the second bracket along the vertical direction. A pressing component is arranged on the lifting seat to overcome the elastic force of the elastic component when the lifting seat moves downward to the limit state so that the limiting block disengages from the limiting square hole. An elastic rotating mechanism is arranged between the pusher and the tank, which can rotate by an angle when the pusher is pressed downward and can reset after being released. A linkage mechanism is arranged between the pusher and the lifting seat, which drives the lifting seat to move downward to the limit state during the process of pressing the pusher downward and drives the lifting seat to reset upward after the pusher is released.

[0007] By adopting the above technical solution, when it is necessary to move the air compressor body, the rear end of the air compressor body is lifted upward by the push handle to lift the rubber buffer pad off the ground, so that the sliding seat overcomes the friction between the limit block and the inclined portion under the action of gravity and slides downward to the position of the limit square hole corresponding to the limit block. The limit block is embedded in the limit square hole under the elastic force of the elastic component. At this time, the lowest end height of the auxiliary wheel is lower than the lowest end height of the rubber buffer pad. When the push handle is released, the main roller and the two auxiliary wheels can be supported on the ground, thereby facilitating the movement of the air compressor body; when it is necessary to fix the air compressor body, the push handle is pressed downward to overcome the elastic force of the elastic rotating mechanism, thereby driving the lifting seat to move downward to the limit state through the linkage mechanism, so that the pressing component overcomes the elastic component The elastic force causes the limit block to disengage from the limit square hole, so that the front end of the tank body is tilted downward. In this state, the tank body tilts forward, causing the limit block to move backward relative to the inclined portion. When the limit block does not completely coincide with the limit square hole, the push handle is released. During the process of the air compressor body tilting forward under the action of its own gravity, the sliding seat is reset toward the higher end of the inclined portion, so that the rubber buffer pad is re-supported on the ground and remains fixed; finally, the push handle is lifted upward to raise the rear end of the air compressor body, so that the auxiliary wheels are supported on the ground and the rubber buffer pad is off the ground, thereby facilitating the movement of the air compressor body; the auxiliary wheels are reset in the process of pressing the push handle downward, and the rubber buffer pad is supported on the ground, thereby facilitating the fixing of the air compressor body.

[0008] The present invention is further configured as follows: the sliding seat is provided with a telescopic groove for telescopically setting the limit block, the sliding seat is provided with a plurality of through holes at the bottom of the telescopic groove, the elastic component includes a plurality of first guide shafts arranged on the lower surface of the limit block and passing through the through holes, a plurality of first compression springs sleeved on the first guide shaft and with both ends pressed against the bottom of the telescopic groove and the lower surface of the limit block, and a plurality of first anti-slip nuts threadedly connected to one end of the first guide shaft passing through the through hole.

[0009] By adopting the above technical solution, the elastic component includes multiple first guide shafts, multiple first compression springs and multiple first anti-slip nuts, thereby driving the limit block to have a tendency to move upward, so that when the limit block and the limit square hole are aligned, the limit block can be embedded in the limit square hole to achieve positioning under the action of the elastic component, so that the auxiliary wheels are supported on the ground, making it convenient to move the air compressor body.

[0010] The present invention is further configured as follows: a plurality of hemispherical holes are provided on the upper surface of the limit block, steel balls are movably provided in the hemispherical holes, an end cover with an exit hole for the top of the steel balls to pass through is provided on the upper surface of the limit block, and the plurality of steel balls are pressed against the lower surface of the inclined portion under the action of the elastic component.

[0011] By adopting the above technical solution, a plurality of movable steel balls are arranged on the upper surface of the limit block so that the steel balls come into contact with the lower surface of the inclined portion, thereby reducing the friction between the steel balls and the lower surface of the inclined portion. This allows the rear end of the air compressor body to be lifted upward by the push handle so that the rubber buffer pad is off the ground, and the sliding seat can slide downward more smoothly under the action of gravity to the position of the limit square hole corresponding to the limit block.

[0012] The present invention is further configured as follows: the pressing assembly includes a pressing rod arranged on one side of the lifting seat close to the second bracket, a pressing block arranged at the lower end of the pressing rod and having a plurality of hemispherical holes; when the lifting seat moves downward to an extreme state, the pressing block protrudes downward from the limiting square hole and presses against a plurality of steel balls.

[0013] By adopting the above technical solution, when the pressing assembly moves downward to the limit state along with the lifting seat and acts on the multiple steel balls of the limit block, the friction between the limit block and the pressing assembly is relatively small, so that the air compressor body with the front end tilted downward is more likely to move relative to the limit block under its own action, making it convenient for the combination of the sliding seat, the limit block, the auxiliary wheel, and the elastic assembly to slide upward along the inclined portion and reset.

[0014] The present invention is further configured as follows: hinged seats are provided on both sides of the tank body, both ends of the push handle are hingedly provided on the hinged seats, a limit seat is provided on the upper end of the hinged seat to limit the upward rotation of the push handle, the elastic rotation mechanism includes an arc rod which is arranged between the hinged seat and the limit seat and the center is located on the hinge axis of the push handle, and a second compression spring, the arc rod passes through the end of the push handle, and the two ends of the second compression spring are pressed between the hinged seat and the end of the push handle to drive the push handle to press against the limit seat.

[0015] By adopting the above technical solution, a limit seat is set to limit the upward rotation of the push handle, so that the rear end of the air compressor body can be lifted upward by the push handle so that the rubber buffer pad is off the ground; in the process of pressing the push handle downward, the elastic force of the second compression spring is overcome to achieve the downward rotation of the push handle, and after the push handle is released, the push handle is pressed against the limit seat under the resetting action of the second compression spring.

[0016] The present invention is further configured as follows: the push handle includes two first rod portions hinged on the hinged seats and in a horizontal state when in contact with the limit seats, two second rod portions connected to one end of the first rod portion away from the hinged seats and extending obliquely upward toward the rear end of the air compressor body, and a third rod portion connected between the upper ends of the two second rod portions, the inclination angle of the second rod portion to the horizontal plane is 80-85 degrees, and the height of the third rod portion from the ground is 80-85 cm.

[0017] By adopting the above technical solution, the air compressor body can be driven to move by pushing or pulling the third rod of the push handle. Usually, the arm of an adult is most relaxed when it is tilted forward or backward by 15-20 degrees, and the height of the palm from the ground is about 80 cm. By making the height of the third rod from the ground 80-85 cm, it is easiest to push and pull the third rod when the arm is at this angle, and it is convenient to adjust the direction of the push and pull force of the palm on the third rod; and when the arm is tilted forward or backward by 15-20 degrees, because the inclination angle of the two rods and the horizontal plane is 80-85 degrees, the force when pushing and pulling the third rod will not excessively turn the push rod downward, avoiding excessive downward rotation affecting the movement of the air compressor body.

[0018] The present invention is further configured as follows: the linkage mechanism includes a first telescopic sleeve arranged at the upper end of the side surface of the second bracket, a second telescopic sleeve arranged at the side surface of the tank body and located above the first telescopic sleeve, a linkage rod telescopically arranged between the first telescopic sleeve and the second telescopic sleeve and having an annular portion in the middle, a linkage seat arranged between the lower end of the linkage rod and the lifting seat, a return spring sleeved on the linkage rod and with both ends pressed against the first telescopic sleeve and the annular portion, and a support seat hingedly arranged at the upper end of the linkage rod and having an embedding groove for the first rod portion of the push rod to be embedded, and the linkage rod keeps the support seat and the first rod portion in a pressed state under the action of the return spring.

[0019] By adopting the above technical solution, when the push rod overcomes the elastic force of the elastic rotating mechanism and rotates downward, the push rod simultaneously overcomes the elastic force of the reset spring, driving the linkage rod to move downward, thereby driving the lifting seat to move downward to the limit state; at the same time, when the push handle is released, the linkage rod is reset under the action of the reset spring, thereby driving the lifting seat to reset; at the same time, the hinged support seat can be under the action of the reset spring, so that the support seat and the first rod portion can always maintain a tight state.

[0020] The present invention is further configured as follows: first horizontal slide rails are provided on both sides of the bottom of the tank body, the upper ends of both sides of the second bracket are slidably connected to the first horizontal slide rails, the first horizontal slide rail is provided with a plurality of positioning grooves arranged and distributed along its length direction, and the upper ends of both sides of the second bracket are threadedly connected with positioning knob bolts for embedding in any one of the positioning grooves; second horizontal slide rails are provided on both sides of the middle part of the tank body, and the second telescopic sleeve is slidably connected to the second horizontal slide rails.

[0021] By adopting the above technical solution, by adjusting the position of the second bracket on the first horizontal slide rail, the initial position of the support seat and the first rod portion of the push rod against each other can be adjusted. Because the push rod rotates downward when pressed downward, the initial position of the support seat and the first rod portion of the push rod against each other is different. When the push rod is rotated downward to make the lifting seat move downward to the limit state, the angle of rotation required for the push rod is different, and the force required to overcome the second compression spring and the reset spring is different. The closer the second bracket is to the rear end of the tank body after moving, the better the stability of the rubber buffer block on the second bracket when supporting the tank body. The closer the second bracket is to the front end of the tank body after moving, the smaller the force required to rotate the push rod downward. At this time, the initial position of the second bracket can be adjusted according to the user's physical fitness.

[0022] The present invention is further configured as follows: a threaded shaft is provided in the middle of the bottom of the second bracket, the rubber buffer pad is threadedly connected to the threaded shaft, a plurality of limiting protrusions surrounding the threaded shaft are provided at the bottom of the second bracket, and a plurality of limiting grooves are provided on the rubber buffer pad; during the threaded connection process of the rubber buffer pad, the plurality of limiting protrusions are embedded in the plurality of limiting grooves through the deformation of the rubber buffer pad.

[0023] By adopting the above technical solution, the rubber buffer pad is threadedly connected to the threaded shaft, thereby realizing the installation of the rubber buffer pad; during the threaded connection process of the rubber buffer pad, the rubber buffer pad is deformed so that multiple limiting protrusions are embedded in multiple limiting grooves, thereby improving the structural stability of the rubber buffer pad after installation and having an anti-slip effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a state diagram of the rubber buffer pad in the present invention being placed on the ground;

[0025] Figure 2 is a state diagram of the auxiliary wheels of the present invention being placed on the ground;

[0026] Figure 3 yes Figure 2 Three-dimensional structure diagram in state;

[0027] Figure 4 yes Figure 1 Side view of the state;

[0028] Figure 5 is a structural cross-sectional view of the connection between the second bracket and the rubber buffer pad;

[0029] Figure 6 It is a partial three-dimensional structural diagram of the present invention near the push handle side;

[0030] Figure 7 yes Figure 6Partial structure diagram after local explosion on the basis;

[0031] Figure 8 It is the partial structure diagram of the sliding seat, roller, limiting hole, and elastic component in the present invention;

[0032] Fig. 9 is Figure 2 The partial structure diagram of the left part.

[0033] Reference numerals: 1, air compressor body; 11, tank body; 12, hinge seat; 13, limiting seat; 14, first horizontal slide rail; 141, positioning groove; 142, positioning knob bolt; 15, second horizontal slide rail; 2, roller assembly; 21, first bracket; 22, main roller; 3, shelving assembly; 31, second bracket; 311, inclined part; 312, limiting square hole; 313, threaded shaft; 314, limiting protrusion; 32, rubber buffer pad; 321, limiting groove; 33, sliding seat; 331, telescopic groove; 332, through hole; 34, auxiliary wheel; 35, limiting block; 351, hemispherical hole; 352, steel ball; 353, end cover; 36, elastic component; 361, first guide shaft; 362, first compression spring; 363, first anti-loosening nut; 37, lifting seat; 38, pressing-down component; 381, pressing-down rod; 382, pressing-down block; 4, push handle; 41, first rod part; 42, second rod part; 43, third rod part; 5, elastic rotating mechanism; 51, arc rod; 52, second compression spring; 6, linkage mechanism; 61, first telescopic sleeve; 62, second telescopic sleeve; 63, linkage rod; 631, annular part; 64, linkage seat; 65, return spring; 66, support seat. Detailed implementation manners

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Embodiment: A mobile air compressor, as Figure 1 and Figure 3 shown, includes an air compressor body 1 with a tank body 11 at the bottom, a roller assembly 2 arranged at the front end of the bottom of the tank body 11, a shelving assembly 3 arranged at the rear end of the bottom of the tank body 11, and a push handle 4 arranged at the rear end of the tank body 11. The roller assembly 2 includes a first bracket 21 arranged at the front end of the bottom of the tank body 11 and main rollers 22 arranged at both ends of the first bracket 21; the shelving assembly 3 includes a second bracket 31 arranged at the rear end of the bottom of the tank body 11 and in a "U" shape, and a rubber buffer pad 32 arranged in the middle of the bottom of the second bracket 31. When the lowest ends of the main rollers 22 and the rubber buffer pad 32 support on the ground, the tank body 11 is in a horizontal state.

[0036] As Figures 3 to 5As shown, a threaded shaft 313 is provided in the middle of the bottom of the second bracket 31, and the rubber buffer pad 32 is threadedly connected to the threaded shaft 313. A plurality of limiting protrusions 314 surrounding the threaded shaft 313 are provided at the bottom of the second bracket 31, and a plurality of limiting grooves 321 are provided on the rubber buffer pad 32; during the threaded connection process of the rubber buffer pad 32, the plurality of limiting protrusions 314 are embedded in the plurality of limiting grooves 321 through the deformation of the rubber buffer pad 32.

[0037] like Figure 2 , such as 6 to Figure 8 As shown, both ends of the bottom of the second bracket 31 are provided with inclined parts 311 extending upwardly and obliquely toward the direction close to the rear end of the tank body 11, and the lower end of the inclined part 311 is provided with a limited square hole 312, and the bottom of the inclined part 311 is slidably connected to a sliding seat 33, and the lower part of the sliding seat 33 is rotatably connected to an auxiliary wheel 34, and the upper surface of the sliding seat 33 is telescopically provided with a limit block 35 matching the limit square hole 312, and an elastic component 36 is provided between the sliding seat 33 and the limit block 35 to drive the limit block 35 to move upward; when the push handle 4 lifts the air compressor body 1 upward After the rear end of the rubber buffer pad 32 is off the ground, the sliding seat 33 overcomes the friction between the limit block 35 and the inclined portion 311 under the action of gravity and slides downward to the position of the limit block 35 corresponding to the limit square hole 312. The limit block 35 is embedded in the limit square hole 312 under the action of the elastic component 36, and the lower end height of the auxiliary wheel 34 is lower than the lower end height of the rubber buffer pad 32. When the push handle 4 is released so that the main roller 22 and the auxiliary wheel 34 are supported on the ground, the rubber buffer pad 32 is off the ground and the front end of the tank body 11 is tilted downward.

[0038] like Figure 8 As shown, the sliding seat 33 is provided with a telescopic groove 331 for the limit block 35 to be telescopically set, and the sliding seat 33 is provided with a plurality of through holes 332 at the bottom of the telescopic groove 331. The elastic component 36 includes a plurality of first guide shafts 361 arranged on the lower surface of the limit block 35 and passing through the through holes 332, a plurality of first compression springs 362 sleeved on the first guide shafts 361 and having both ends pressed against the bottom of the telescopic groove 331 and the lower surface of the limit block 35, and a plurality of first anti-slip nuts 363 threadedly connected to one end of the first guide shaft 361 passing through the through holes 332. The upper surface of the limit block 35 is provided with a plurality of hemispherical holes 351, and steel balls 352 are movably set in the hemispherical holes 351. The upper surface of the limit block 35 is provided with an end cover 353 having a through hole for the top of the steel balls 352 to pass through. Under the action of the elastic component 36, the plurality of steel balls 352 are pressed against the lower surface of the inclined portion 311.

[0039] like Figure 6 and Figure 7As shown, lifting seats 37 are respectively provided on both sides of the second bracket 31 for lifting and lowering along the vertical direction, and a pressing assembly 38 is provided on the lifting seat 37 for overcoming the elastic force of the elastic assembly 36 when the lifting seat 37 moves downward to the limit state so that the limit block 35 is separated from the limit square hole 312. The pressing assembly 38 includes a pressing rod 381 provided on one side of the lifting seat 37 close to the inside of the second bracket 31, a pressing block 382 provided at the lower end of the pressing rod 381 and having a plurality of hemispherical holes 351, and when the lifting seat 37 moves downward to the limit state, the pressing block 382 protrudes downward from the limit square hole 312 and presses against a plurality of steel balls 352.

[0040] like Figure 6 and Fig. 9 As shown, an elastic rotating mechanism 5 is provided between the push handle 4 and the tank body 11, which drives the push handle 4 to rotate when it is pressed downward and can be reset after being released. Articulated seats 12 are provided on both sides of the tank body 11, and both ends of the push handle 4 are hingedly provided on the articulated seats 12. A limit seat 13 is provided on the upper end of the articulated seat 12 to limit the push handle 4 from rotating upward. The elastic rotating mechanism 5 includes an arc rod 51 and a second compression spring 52, which are provided between the articulated seat 12 and the limit seat 13 and whose center is on the articulated axis of the push handle 4. The arc rod 51 passes through the end of the push handle 4, and both ends of the second compression spring 52 are pressed between the articulated seat 12 and the end of the push handle 4 to drive the push handle 4 to press against the limit seat 13. The push handle 4 includes two first rod portions 41 hinged on the hinge seat 12 and in a horizontal state when in contact with the limit seat 13, two second rod portions 42 connected to one end of the first rod portion 41 away from the hinge seat 12 and extending obliquely upward toward the rear end of the air compressor body 1, and a third rod portion 43 connected between the upper ends of the two second rod portions 42. The inclination angle of the second rod portion 42 to the horizontal plane is 80-85 degrees (81 degrees in this embodiment), and the height of the third rod portion 43 from the ground is 80-85 cm.

[0041] like Figure 6 , Figure 7 and Fig. 9As shown, a linkage mechanism 6 is provided between the push handle 4 and the lifting seat 37, which drives the lifting seat 37 to move downward to the limit state in the process of pressing the push handle 4 downward, and drives the lifting seat 37 to reset upward after releasing the push handle 4. The linkage mechanism 6 includes a first telescopic sleeve 61 provided at the upper end of the side of the second bracket 31, a second telescopic sleeve 62 provided at the side of the tank body 11 and located above the first telescopic sleeve 61, a linkage rod 63 telescopically provided between the first telescopic sleeve 61 and the second telescopic sleeve 62 and having an annular portion 631 in the middle, a linkage seat 64 provided between the lower end of the linkage rod 63 and the lifting seat 37, a return spring 65 sleeved on the linkage rod 63 and having both ends pressed against the first telescopic sleeve 61 and the annular portion 631, and a support seat 66 hingedly provided at the upper end of the linkage rod 63 and having an embedding groove (not marked in the figure) for the first rod portion 41 of the push rod to be embedded. Under the action of the return spring 65, the linkage rod 63 keeps the support seat 66 and the first rod portion 41 in a tight state.

[0042] like Figure 6 , Figure 7 and Fig. 9 As shown, in addition, first horizontal slide rails 14 are arranged on both sides of the bottom of the tank body 11, and the upper ends of both sides of the second bracket 31 are slidably connected to the first horizontal slide rails 14. The first horizontal slide rail 14 is provided with a plurality of positioning grooves 141 arranged and distributed along its length direction, and the upper ends of both sides of the second bracket 31 are threadedly connected with positioning knob bolts 142 for embedding in any one of the positioning grooves 141; second horizontal slide rails 15 are arranged on both sides of the middle part of the tank body 11, and the second telescopic sleeve 62 is slidably connected to the second horizontal slide rails 15.

[0043] Description of the operating principle: when it is necessary to move the air compressor body 1, the rear end of the air compressor body 1 is lifted upward by the push handle 4 to lift the rubber buffer pad 32 off the ground, so that the sliding seat 33 overcomes the friction between the limit block 35 and the inclined portion 311 under the action of gravity and slides downward to the position of the limit square hole 312 corresponding to the limit block 35. The limit block 35 is embedded in the limit square hole 312 under the elastic force of the elastic component 36. At this time, the lowest end height of the auxiliary wheel 34 is lower than the lowest end height of the rubber buffer pad 32. When the push handle 4 is released, the main roller 22 and the two auxiliary wheels 34 can be supported on the ground, thereby facilitating the movement of the air compressor body 1; when it is necessary to fix the air compressor body 1, the push handle 4 is pressed downward to overcome the elastic force of the elastic rotating mechanism 5, thereby driving the lifting seat 37 to move downward to the limit state through the linkage mechanism 6, so that the pressing component 38 overcomes the elastic component 36. The elastic force causes the limit block 35 to disengage from the limit square hole 312, so that the front end of the tank body 11 is tilted downward. In this state, the tank body 11 will tilt forward, causing the limit block 35 to move backward relative to the inclined portion 311. When the limit block 35 does not completely overlap with the limit square hole 312, the push handle 4 is released. During the process of tilting forward under the action of the air compressor body 1's own gravity, the sliding seat 33 is reset toward the higher end of the inclined portion 311, so that the rubber buffer pad 32 is re-supported on the ground and remains fixed; finally, the push handle 4 is lifted upward to raise the rear end of the air compressor body 1, so that the auxiliary wheel 34 is supported on the ground and the rubber buffer pad 32 is off the ground, thereby facilitating the movement of the air compressor body 1; the auxiliary wheel 34 is reset by pressing the push handle 4 downward, and the rubber buffer pad 32 is supported on the ground, thereby facilitating the fixing of the air compressor body 1.

[0044] The present application also has the following advantages: (1) By arranging a plurality of movable steel balls 352 on the upper surface of the limit block 35, the steel balls 352 are in contact with the lower surface of the inclined portion 311, thereby reducing the friction between the lower surface of the inclined portion 311, so that the rear end of the air compressor body 1 is lifted upward by the push handle 4 to lift the rubber buffer pad 32 off the ground, and the sliding seat 33 can slide downward more smoothly to the position of the limit block 35 corresponding to the limit square hole 312 under the action of gravity. (2) By pushing or pulling the third rod 43 of the push handle 4, the air compressor body 1 can be driven to move. Usually, an adult's arm is most relaxed when it is tilted forward or backward by 15-20 degrees. At this time, the height of the palm from the ground is about 80 cm. By making the height of the third rod 43 from the ground 80-85 cm, it is easiest to push and pull the third rod 43 when the arm is at this angle, and it is convenient to adjust the direction of the push and pull force of the palm on the third rod 43; and when the arm is tilted forward or backward by 15-20 degrees, because the inclination angle of the two rods and the horizontal plane is 80-85 degrees, the force used to push and pull the third rod 43 will not excessively rotate the push rod downward, thereby avoiding affecting the movement of the air compressor body 1 when the push rod is excessively rotated downward. (3) By adjusting the position of the second bracket 31 on the first horizontal slide rail 14, the initial position where the support seat 66 and the first rod portion 41 of the push rod are tightly pressed against each other can be adjusted. Since the push rod rotates downward when it is pressed downward, the initial position where the support seat 66 and the first rod portion 41 of the push rod are tightly pressed against each other is different. When the push rod is rotated downward to make the lifting seat 37 move downward to the limit state, the angle of rotation required for the push rod is different, and the force required to overcome the second compression spring 52 and the return spring 65 is different. As the second bracket 31 moves closer to the rear end of the tank body 11, the rubber buffer pad 32 on the second bracket 31 provides better stability when supporting the tank body 11. As the second bracket 31 moves closer to the front end of the tank body 11, the force required to rotate the push rod downward is smaller. At this time, the initial position of the second bracket 31 can be adjusted according to the user's physical fitness. (4) The rubber buffer pad 32 is threadedly connected to the threaded shaft 313, thereby realizing the installation of the rubber buffer pad 32; during the threaded connection process of the rubber buffer pad 32, the rubber buffer pad 32 is deformed so that the multiple limiting protrusions 314 are embedded in the multiple limiting grooves 321, thereby improving the structural stability of the rubber buffer pad 32 after installation and having an anti-slip effect.

[0045] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A mobile air compressor, comprising an air compressor body (1) with a tank body (11) at the bottom, a roller assembly (2) arranged at the front end of the bottom of the tank body (11), a resting assembly (3) arranged at the rear end of the bottom of the tank body (11), and a pusher (4) arranged at the rear end of the tank body (11). Characterized in that: The roller assembly (2) includes a first bracket (21) arranged at the front end of the bottom of the tank body (11), and main rollers (22) arranged at both ends of the first bracket (21); The resting assembly (3) includes a second bracket (31) arranged at the rear end of the bottom of the tank body (11), and a rubber buffer cushion block (32) arranged in the middle of the bottom of the second bracket (31). When the lowest ends of the main rollers (22) and the rubber buffer cushion block (32) support on the ground, the tank body (11) is in a horizontal state; The second bracket (31) is in a "U" shape. Both ends of the bottom of the second bracket (31) are provided with inclined portions (311) extending obliquely upward in the direction close to the rear end of the tank body (11). A limiting square hole (312) is arranged at the lower end of the inclined portion (311). A sliding seat (33) is slidably connected to the bottom of the inclined portion (311). An auxiliary wheel (34) is rotatably connected below the sliding seat (33). A limiting block (35) matching the limiting square hole (312) is telescopically arranged on the upper surface of the sliding seat (33). An elastic component (36) for driving the limiting block (35) to move upward is arranged between the sliding seat (33) and the limiting block (35). When the rear end of the air compressor body (1) is lifted upward by the pusher (4) so that the rubber buffer cushion block (32) leaves the ground, the sliding seat (33) slides downward under the action of gravity to overcome the friction between the limiting block (35) and the inclined portion (311) to the position where the limiting block (35) corresponds to the limiting square hole (312). The limiting block (35) is embedded in the limiting square hole (312) under the action of the elastic component (36), and the lowest end height of the auxiliary wheel (34) is lower than the lowest end height of the rubber buffer cushion block (32). When the pusher (4) is released so that the main rollers (22) and the auxiliary wheel (34) support on the ground, the rubber buffer cushion block (32) leaves the ground and the front end of the tank body (11) is inclined downward; On both sides of the second bracket (31), lifting seats (37) are respectively arranged to move up and down along the vertical direction. A pressing component (38) is arranged on the lifting seats (37) to overcome the elastic force of the elastic component (36) when the lifting seats (37) move downward to the limit state so that the limiting block (35) disengages from the limiting square hole (312). An elastic rotating mechanism (5) that can rotate by an angle when the pusher (4) is pressed downward and can reset after being released is arranged between the pusher (4) and the tank body (11). A linkage mechanism (6) is arranged between the pusher (4) and the lifting seats (37) to drive the lifting seats (37) to move downward to the limit state during the process of pressing the pusher (4) downward, and to drive the lifting seats (37) to reset upward after the pusher (4) is released.

2. A mobile air compressor according to claim 1, Features: The sliding seat (33) is provided with a telescopic groove (331) for the limit block (35) to be telescopically arranged, and the sliding seat (33) is provided with a plurality of through holes (332) at the bottom of the telescopic groove (331). The elastic component (36) comprises a plurality of first guide shafts (361) arranged on the lower surface of the limit block (35) and passing through the through holes (332), a plurality of first compression springs (362) sleeved on the first guide shafts (361) and with both ends pressed against the bottom of the telescopic groove (331) and the lower surface of the limit block (35), and a plurality of first anti-slip nuts (363) threadedly connected to one end of the first guide shaft (361) passing through the through holes (332).

3. A mobile air compressor according to claim 1, Features: The upper surface of the limit block (35) is provided with a plurality of hemispherical holes (351), steel balls (352) are movably arranged in the hemispherical holes (351), and the upper surface of the limit block (35) is provided with an end cover (353) having an exit hole for the top of the steel balls (352) to pass through, and the plurality of steel balls (352) are pressed against the lower surface of the inclined portion (311) under the action of the elastic component (36).

4. A mobile air compressor according to claim 3, Features: The pressing assembly (38) comprises a pressing rod (381) arranged on one side of the lifting seat (37) close to the second bracket (31), a pressing block (382) arranged at the lower end of the pressing rod (381) and having a plurality of hemispherical holes (351); when the lifting seat (37) moves downward to an extreme state, the pressing block (382) protrudes downward from the limiting square hole (312) and presses against the plurality of steel balls (352).

5. A mobile air compressor according to claim 1, Features: The tank body (11) is provided with hinged seats (12) on both sides, the two ends of the push handle (4) are hingedly arranged on the hinged seats (12), and the upper end of the hinged seat (12) is provided with a limit seat (13) for limiting the upward rotation of the push handle (4). The elastic rotating mechanism (5) comprises an arc rod (51) and a second compression spring (52) which are arranged between the hinged seat (12) and the limit seat (13) and the center of which is located on the hinge axis of the push handle (4). The arc rod (51) passes through the end of the push handle (4), and the two ends of the second compression spring (52) are pressed between the hinged seat (12) and the end of the push handle (4) to drive the push handle (4) to press against the limit seat (13).

6. A mobile air compressor according to claim 5, Features: The push handle (4) comprises two first rod portions (41) hinged on the hinge seats (12) and in a horizontal state when in contact with the limit seat (13), two second rod portions (42) connected to one end of the first rod portion (41) away from the hinge seats (12) and extending upwardly in a direction inclined toward the rear end of the air compressor body (1), and a third rod portion (43) connected between the upper ends of the two second rod portions (42), wherein the inclination angle of the second rod portion (42) with the horizontal plane is 80-85 degrees, and the height of the third rod portion (43) from the ground is 80-85 centimeters.

7. A mobile air compressor according to claim 6, Features: The linkage mechanism (6) comprises a first telescopic sleeve (61) arranged at the upper end of the side surface of the second bracket (31), a second telescopic sleeve (62) arranged at the side surface of the tank body (11) and located above the first telescopic sleeve (61), a linkage rod (63) telescopically arranged between the first telescopic sleeve (61) and the second telescopic sleeve (62) and having an annular portion (631) in the middle, a linkage seat (64) arranged between the lower end of the linkage rod (63) and the lifting seat (37), a return spring (65) sleeved on the linkage rod (63) and having two ends pressed against the first telescopic sleeve (61) and the annular portion (631), and a support seat (66) hingedly arranged at the upper end of the linkage rod (63) and having an embedding groove for the first rod portion (41) of the push rod to be embedded, wherein the linkage rod (63) keeps the support seat (66) and the first rod portion (41) in a pressed state under the action of the return spring (65).

8. A mobile air compressor according to claim 7, Features: First horizontal slide rails (14) are arranged on both sides of the bottom of the tank body (11); the upper ends of both sides of the second bracket (31) are slidably connected to the first horizontal slide rails (14); the first horizontal slide rail (14) is provided with a plurality of positioning grooves (141) arranged and distributed along the length direction thereof; the upper ends of both sides of the second bracket (31) are threadedly connected with positioning knob bolts (142) for embedding in any one of the positioning grooves (141); second horizontal slide rails (15) are arranged on both sides of the middle of the tank body (11); the second telescopic sleeve (62) is slidably connected to the second horizontal slide rails (15).

9. The mobile air compressor according to claim 1, Features: A threaded shaft (313) is provided in the middle of the bottom of the second bracket (31), the rubber buffer pad (32) is threadedly connected to the threaded shaft (313), a plurality of limiting protrusions (314) surrounding the threaded shaft (313) are provided at the bottom of the second bracket (31), and a plurality of limiting grooves (321) are provided on the rubber buffer pad (32); during the threaded connection process of the rubber buffer pad (32), the plurality of limiting protrusions (314) are embedded in the plurality of limiting grooves (321) through the deformation of the rubber buffer pad (32).

Images