Air cylinder front cover of tire pulling machine

Abstract

The utility model relates to a cylinder front cover of a tire pulling machine, which relates to the technical field of pneumatic elements, and comprises a shaft barrel part, a deep part and an end cover part which are integrally connected in sequence and are sequentially increased in area along the cross section, the shaft barrel part, the deep part and the end cover part are coaxial, and a through hole for a telescopic rod to penetrate in a sliding manner is formed in the shaft barrel part, the deep part and the end cover part in a penetrating manner in the axial direction; a first clamping groove used for being connected with the air cylinder shell is formed in the side face of the deep part in the circumferential direction, a distance exists between the first clamping groove and the end cover part, the side, away from the end cover part, of the first clamping groove is an inclined face, and threaded holes used for fixing the air cylinder front cover and the air cylinder shell are symmetrically formed in the side face of the end cover part. The structure of the air cylinder front cover is improved, the front cover and the shell are convenient to disassemble under the condition that the stability of a connecting structure between the air cylinder front cover and the air cylinder shell is guaranteed, and the economic applicability of the air cylinder front cover is improved.

Description

Technical Field

[0001] The present application relates to the field of pneumatic component technologies, and particularly to a front cover of a tire dismounting machine cylinder. Background Art

[0002] A tire dismounting machine, also called a tire changer, is used for installing and uninstalling vehicle tires, and can replace tires for different vehicles such as cars, motorcycles, and heavy trucks. It is an essential equipment for auto repair shops and 4S stores. There are two types: pneumatic and hydraulic, and the most commonly used one is pneumatic. Currently, the tire dismounting machine assembly includes a horizontally arranged cylinder used to drive the tire dismounting device to move, so as to realize the docking between the beak on the tire dismounting machine and the side of the tire.

[0003] During actual use, the telescopic rod of the cylinder has to bear a large load. The cylinder is mainly connected to the fixed parts through the front end cover part to maintain the stability of the overall structure of the cylinder. Since the telescopic rod of the cylinder bears a large load, the telescopic rod needs to be replaced frequently. However, because the cylinder block and the front cover are connected by a snap structure, and the cylinder parts are soaked in oil, the disassembly operation is very difficult. Summary of the Utility Model

[0004] In order to improve the structure of the cylinder of the tire dismounting machine in the prior art and solve the problem of difficult disassembly between the cylinder block and the front cover of the cylinder, the present application provides a front cover of a tire dismounting machine cylinder.

[0005] The front cover of the tire dismounting machine cylinder provided by the present application adopts the following technical solution:

[0006] A front cover of a tire dismounting machine cylinder includes a shaft cylinder part, a deepening part, and an end cover part that are integrally connected in sequence and have cross-sectional areas increasing in sequence. The shaft cylinder part, the deepening part, and the end cover part are coaxial, and a through hole for the telescopic rod to slide through is commonly opened along the axial direction. A first clamping groove for connecting with the cylinder housing is circumferentially opened on the side surface of the deepening part. There is a distance between the first clamping groove and the end cover part, and the side of the first clamping groove away from the end cover part is an inclined surface. Threaded holes for fixing the front cover of the cylinder and the cylinder housing are symmetrically opened on the side surface of the end cover part.

[0007] By adopting the above technical solution, when installing the front cover and the cylinder housing, the convex ring on the inner side surface of the housing is clamped with the first clamping groove opened on the outer side surface of the front cover, so as to realize the fixed connection between the housing and the front cover. When the housing and the front cover are clamped, screws are inserted into the threaded holes to facilitate the reinforcement of the connection structure. Designing the side of the first clamping groove away from the end cover part as an inclined surface can prevent the separation from being difficult due to the too stable clamping structure between the convex ring of the housing and the first clamping groove on the front cover when the front cover and the housing are separated, and can also avoid the side wall of the first clamping groove being worn due to multiple disassembly operations.

[0008] Optionally, an air port communicating with the threaded hole is formed in the end cover portion, the air port penetrates through the deepening portion, and communicates with the side of the deepening portion away from the end cover portion.

[0009] By adopting the above technical solution, air can be introduced into the cylinder through the air port, and the amount of intake air is controlled by the screw threadedly inserted into the threaded hole, so as to increase the pressure difference between the two sides of the telescopic rod inside the cylinder and achieve the purpose of improving the working efficiency of the cylinder.

[0010] Optionally, a first stepped groove for preventing the telescopic rod from extending out of the cylinder is formed on the side of the deepening portion away from the end cover portion, and the first stepped groove is coaxial with the through hole.

[0011] By adopting the above technical solution, it is possible to avoid the situation that the telescopic rod of the cylinder directly abuts against the end of the deepening portion, resulting in a reduction in the space inside the cylinder on the side of the telescopic rod close to the deepening portion and affecting the working efficiency of the cylinder.

[0012] Optionally, a second stepped groove for installing a guide sleeve is formed on the side of the shaft cylinder portion away from the end cover portion, and the diameter of the second stepped groove is smaller than that of the first stepped groove.

[0013] By adopting the above technical solution, it is possible to prevent the situation that when the length of the telescopic rod in the axial direction is small, the telescopic rod enters the cylinder body and cannot be smoothly pulled out.

[0014] Optionally, a third stepped groove for installing a dust-proof ring is formed on the side of the shaft cylinder portion away from the end cover portion, and the depth of the third stepped groove in the axial direction is smaller than the depth of the second stepped groove in the axial direction.

[0015] By adopting the above technical solution, a sealing structure can be formed at the position of the telescopic rod of the cylinder close to the shaft cylinder portion end, so as to prevent floating dust in the external air from entering the cylinder through the reciprocating movement of the telescopic rod and causing dust accumulation inside the cylinder.

[0016] Optionally, a second clamping groove is formed on the outer side of the shaft cylinder portion along the circumferential direction, and the second clamping groove is formed in the middle of the shaft cylinder portion in the axial direction.

[0017] By adopting the above technical solution, it is convenient for an external cylindrical part to be clamped with the cylinder, and the stability of the connection structure between the cylinder and the external part is improved.

[0018] Optionally, the two opposite side walls in the second clamping groove are both inclined structures.

[0019] By adopting the above technical solution, it is convenient to maintain the stability between the cylinder and external parts, facilitate the disassembly between the cylinder and external parts, and improve the operability of the cylinder during actual use.

[0020] Optionally, a plurality of annular grooves are formed on one side of the deepening portion away from the end cover portion, and the plurality of annular grooves are circumferentially distributed along the deepening portion.

[0021] By adopting the above technical solution, the space on the side of the telescopic rod inside the cylinder close to the deepening portion is increased to improve the air pressure difference at both ends of the telescopic rod of the cylinder. At the same time, the material used for the front cover can be reduced, and the material cost in the manufacturing process of the front cover can be improved.

[0022] Optionally, two abutting grooves communicating with the side surface of the shaft cylinder portion are symmetrically formed at one end of the shaft cylinder portion away from the end cover portion.

[0023] By adopting the above technical solution, it is more convenient for the cylinder to be connected with other parts, avoiding rotational connection between other parts and the front cover of the cylinder, and preventing the end cover portion from abutting against external parts to protect the cylinder structure.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. For the front cover of the tire dismounting machine cylinder of the present application, by providing the first clamping groove with one side being an inclined surface, it is more convenient to disassemble the front cover of the cylinder from the housing, avoiding damage to the position of the first clamping groove of the front cover caused by multiple disassembly operations;

[0026] 2. For the front cover of the tire dismounting machine cylinder of the present application, by providing the air port, the pressure difference on both sides of the telescopic rod inside the cylinder can be adjusted by screws, improving the adjustability of the movement speed of the telescopic rod inside the cylinder. Description of the Drawings

[0027] Figure 1 is the overall structural view of the front cover of a tire dismounting machine cylinder of the present application.

[0028] Figure 2 is Figure 1 the cross-sectional view at A-A in

[0029] Explanation of the reference numerals: 1. Shaft cylinder portion; 11. Second stepped groove; 12. Third stepped groove; 13. Second clamping groove; 2. End cover portion; 21. Threaded hole; 22. Air port; 3. Deepening portion; 31. First clamping groove; 32. First stepped groove; 33. Annular groove; 34. Abutting groove; 4. Through hole. Detailed Embodiment

[0030] The following further elaborates on the present application in conjunction with the attached Figure 1-2 for a more detailed description.

[0031] An embodiment of the present application discloses a front cover of a tire demounting machine cylinder.

[0032] Referring to Figure 1 , a front cover of a tire demounting machine cylinder includes an integrally connected shaft cylinder part 1, an end cover part 2, and a deepening part 3. The shaft cylinder part 1, the end cover part 2, and the deepening part 3 are connected in sequence coaxially, and the cross-sectional areas from the shaft cylinder part 1, the end cover part 2 to the deepening part 3 increase in sequence. A through hole 4 for passing through a telescopic rod is commonly formed through the middle parts of the three in the axial direction. A first clamping groove 31 for realizing clamping connection between the front cover and the cylinder housing is formed in the side of the deepening part 3 near the middle in the axial direction. One side of the first clamping groove 31 close to the end of the deepening part 3 away from the end cover part 2 is an inclined surface, so as to make it more convenient when the cylinder housing is separated from the front cover, and avoid the situation that the first clamping groove 31 is worn due to multiple forced dismountings.

[0033] Referring to Figure 1 and Figure 2 , further, in order to ensure that the connection structure between the cylinder housing and the front cover is sufficiently stable and prevent the front cover of the cylinder and the housing from separating due to a large axial force during the operation of the cylinder, resulting in damage to the cylinder, therefore, two threaded holes 21 are symmetrically formed in the radial direction on the end cover part 2 of the front cover, so that the screw can pass through the housing and be threadedly connected to the front cover.

[0034] Referring to Figure 1 and Figure 2 , an air port 22 is formed in the end cover part 2, and both ends of the air port 22 are respectively communicated with the side of the deepening part 3 away from the end cover part 2 and the inside of one of the threaded holes 21, so as to control the air pressure difference on both sides of the telescopic rod when the telescopic rod inside the cylinder slides, and indirectly realize the adjustment of the sliding speed of the telescopic rod.

[0035] In the present application, the size of the air volume per unit of the air port 22 is mainly controlled by the rotation of the screw. Since there are two screws connecting the front cover and the cylinder housing, rotating one of the screws will not affect the connection structure.

[0036] Referring to Figure 1 and Figure 2 , a first stepped groove 32 coaxial with the through hole 4 is formed in the deepening part 3 at the position of the through hole 4. The purpose of forming the first stepped groove 32 is to avoid direct collision between the cylinder and the end of the deepening part 3 during the sliding process, and prevent the connection stability between the front cover and the cylinder housing from being reduced due to damage to the position of the deepening part 3 of the front cover under multiple collisions.

[0037] Referring to Figure 1 and Figure 2, on the side of the shaft cylinder part 1 away from the end cover part 2, a second stepped groove 11 coaxial with the through hole 4 is provided. The design of the second stepped groove 11 is to facilitate the installation of a guide sleeve used to prevent radial sliding inside the through hole 4 on the telescopic rod. At the same time, the second stepped groove 11 can also prevent the telescopic rod from completely entering the cylinder when its length is short, resulting in abnormal operation of the cylinder.

[0038] In this application, it is preferred that the diameter of the second stepped groove 11 is smaller than that of the first stepped groove 32, so as to facilitate the installation of the guide sleeve and enable the telescopic rod to smoothly penetrate into the through hole 4.

[0039] Refer to Figure 1 and Figure 2 , on the side of the shaft cylinder part 1 away from the end cover part 2, a third stepped groove 12 is provided. The diameter of the third stepped groove 12 is smaller than that of the first stepped groove 32 and larger than that of the second stepped groove 11, and its depth is smaller than that of the second stepped groove 11. The third stepped groove 12 communicates with the side of the shaft cylinder part 1 away from the end cover part 2, and is designed to install a dust-proof ring used to prevent floating dust in the air from entering the cylinder and causing dust accumulation inside the cylinder.

[0040] Refer to Figure 1 and Figure 2 , on the outer side surface of the shaft cylinder part 1, a second clamping groove 13 is axially provided to facilitate the clamping connection between external parts and the front cover, improving the stability of the cylinder connection structure. It is worth mentioning that in this application, the two opposite side surfaces of the second clamping groove 13 are both inclined structures, so that the front cover of the cylinder and external parts can be more conveniently disassembled when connected.

[0041] Refer to Figure 1 and Figure 2 , on the side of the deepening part 3 away from the end cover part 2, a number of annular grooves 33 are provided to reduce the production materials of the front cover and its production cost on the premise of ensuring the structural stability of the front cover.

[0042] Refer to Figure 1 and Figure 2 , further, at the end of the shaft cylinder part 1 away from the end cover part 2, a number of abutting grooves 34 are provided to prevent the external parts from being rotationally connected to the cylinder. The number of abutting grooves 34 is circumferentially distributed along the shaft cylinder part 1. The distance between the bottom of the abutting groove 34 and the end of the shaft cylinder part 1 does not exceed 10 mm.

[0043] Preferably, there are two abutting grooves 34, and they are symmetrically distributed on both sides of the end of the shaft cylinder part 1.

[0044] The implementation principle of the front cover of the tire dismounting machine cylinder in this application embodiment is:

[0045] When installing the cylinder front cover, the telescopic rod is movably connected to the front cover through the through hole 4. At the same time, the cylinder housing is sleeved outside the deep part 3, and is clamped with the deep part 3 at the position of the first clamping groove 31, and is fixed by the threaded connection between two screws and two threaded holes 21 respectively.

[0046] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A front cover of a tire pulling machine cylinder, comprising a shaft cylinder portion (1), a deep portion (3) and an end cover portion (2) which are integrally connected in sequence and whose cross-sectional areas increase in sequence, wherein the shaft cylinder portion (1), the deep portion (3) and the end cover portion (2) are coaxial, and a through hole (4) is formed through the shaft cylinder portion (1), the deep portion (3) and the end cover portion (2) along the axial direction for slidingly passing through a telescopic rod, characterized in that: A first clamping groove (31) for connecting with the cylinder housing is circumferentially provided on the side of the deep-entry portion (3), the first clamping groove (31) being spaced from the end cover portion (2), and a side of the first clamping groove (31) away from the end cover portion (2) being an inclined surface, and threaded holes (21) for fixing the cylinder front cover and the cylinder housing are symmetrically provided on the side of the end cover portion (2).

2. The front cover of the tire pulling machine cylinder according to claim 1, characterized in that: The end cover portion (2) is provided with an air port (22) connected to the threaded hole (21); the air port (22) passes through the deep portion (3) and is connected to a side of the deep portion (3) away from the end cover portion (2).

3. The front cover of the tire pulling machine cylinder according to claim 2, characterized in that: A first stepped groove (32) for preventing the telescopic rod from extending out of the cylinder is provided on a side of the deep-entry portion (3) away from the end cover portion (2), and the first stepped groove (32) is coaxial with the through hole (4).

4. The front cover of the tire pulling machine cylinder according to claim 3, characterized in that: A second stepped groove (11) for mounting a guide sleeve is provided on a side of the shaft barrel portion (1) away from the end cover portion (2), and the diameter of the second stepped groove (11) is smaller than that of the first stepped groove (32).

5. The front cover of the tire pulling machine cylinder according to claim 4, characterized in that: A third step groove (12) for installing a dust ring is provided on a side of the shaft tube portion (1) away from the end cover portion (2), and the depth of the third step groove (12) along the axial direction is smaller than the depth of the second step groove (11) along the axial direction.

6. The front cover of the tire pulling machine cylinder according to claim 5, characterized in that: A second clamping groove (13) is provided on the outer side of the shaft cylinder (1) along the circumferential direction, and the second clamping groove (13) is provided in the middle of the shaft cylinder (1) along the axial direction.

7. The front cover of the tire pulling machine cylinder according to claim 6, characterized in that: The two opposite side walls in the second clamping groove (13) are both inclined structures.

8. The front cover of the tire pulling machine cylinder according to claim 7, characterized in that: A plurality of annular grooves (33) are provided on a side of the deep portion (3) away from the end cover portion (2), and the plurality of annular grooves (33) are distributed along the circumference of the deep portion (3).

9. The front cover of the tire pulling machine cylinder according to claim 1, characterized in that: One end of the shaft barrel portion (1) away from the end cover portion (2) is symmetrically provided with two abutment grooves (34) that are in communication with the side surface of the shaft barrel portion (1).

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