Brake drum press-fitting hub bolt hydraulic oil cylinder

Abstract

The utility model relates to the technical field of bolt hydraulic oil cylinders, in particular to a brake drum press-fitting hub bolt hydraulic oil cylinder which is simple in structure, reliable in working effect, stable in movement and capable of effectively solving the problems of pressing damage, excessive press-fitting and not-in-place press-fitting in the product press-fitting process. Comprising a bolt pressing tool assembly, and the bolt pressing tool assembly is arranged on a platform at the bottom of a pressing machine; the device further comprises an assembling assembly, an oil cylinder assembly and multiple sets of piston rods, the oil cylinder assembly is installed above the pressing machine, the oil cylinder assembly and the bolt pressing tool assembly are oppositely arranged up and down, the multiple sets of piston rods are installed on the oil cylinder assembly in an up-down sliding mode through the assembling assembly, and the number of the multiple sets of piston rods corresponds to the number of hub bolts. A clamp used for fixing a brake drum is arranged on the upper portion of the bolt pressing tool assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt hydraulic cylinders, in particular to a brake drum press-fit wheel hub bolt hydraulic cylinder. Background Art

[0002] In products such as brake drum hubs, hub bolts must be pressed into place with interference fit to facilitate subsequent installation of wheels and tires. Typically, the press-fitting process uses a press machine in conjunction with tooling to directly press the bolts into place. However, this process has the disadvantage of unstable reciprocating motion, and the lack of a buffer during the press-fitting process can easily damage the product and hub bolts. Furthermore, the uneven thickness of the hub bolt heads can easily cause the hub bolts to be improperly pressed or over-pressed, impacting product performance. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a brake drum wheel hub bolt hydraulic cylinder with a simple structure, reliable working effect, smooth movement, and the ability to effectively solve the problems of pressure damage, excessive pressing, and inadequate pressing during product pressing.

[0004] The cam assembly is configured to move the plurality of piston rods downwardly and move the plurality of piston rods toward the wheel hub bolts, thereby ensuring that the plurality of piston rods are pressed and installed on the wheel hub bolts.

[0005] Preferably, the oil cylinder assembly includes an upper fixing plate, an upper sealing plate, an oil cylinder body, bolts, a first locating pin, a sixth sealing ring, a combined pad nitrile sealing gasket, a lower end cover, a second locating pin and screws. The upper fixing plate is connected to the top of the upper sealing plate by multiple groups of bolts, the bottom end of the upper sealing plate is mounted on the top of the oil cylinder body by multiple groups of first locating pins, the sixth sealing ring and multiple groups of combined pad nitrile sealing gaskets are both mounted on the bottom of the oil cylinder body, the top end of the lower end cover is connected to the bottom of the oil cylinder body by multiple groups of second locating pins, and the lower end cover is provided with an oil inlet and outlet. Multiple sets of screws are installed in cooperation on the lower end cover, and the multiple sets of screws are used to fix the lower end cover and the cylinder body. Multiple sets of piston rods are installed inside the cylinder body through the lower end cover through the assembly components; the upper fixed plate is installed on the fixed surface above the press, and the multiple sets of piston rods are installed on the lower end cover and the cylinder body by sliding up and down through the assembly components. When the hydraulic oil enters the cylinder body, the hydraulic oil drives the multiple sets of piston rods to move downward through the assembly components, so that the multiple sets of piston rods press the wheel hub bolts onto the brake drum, thereby improving the stability of use.

[0006] Preferably, the assembly component includes a pressure head, a first sealing ring, a piston, a second sealing ring, a fixing sleeve, a third sealing ring, an elastic retaining ring, a fourth sealing ring, a guide band and a fifth sealing ring, the third sealing ring is installed on the outer wall of the fixing sleeve, the fixing sleeve is installed on the lower end cover and fixed by the elastic retaining ring, the fourth sealing ring, the guide band and the fifth sealing ring are respectively installed on the inner wall of the fixing sleeve, the piston rod slides up and down through the inside of the fixing sleeve, the second sealing ring and the piston are respectively installed on the outer wall of the piston rod, the first sealing ring is installed on the outer wall of the piston, and the pressure head is installed at the bottom end of the piston rod; when the assembly assembly installs multiple groups of piston rods on the lower end cover and the cylinder body, the hydraulic oil enters the cylinder body and pushes the piston to move downward, thereby causing the piston to drive the piston rod to move downward. After the piston rod moves downward, the wheel hub bolt is pressed together by multiple groups of pressure heads. By arranging the first sealing ring, the third sealing ring, the elastic retaining ring, the fourth sealing ring, the guide band and the fifth sealing ring, the sealing of the hydraulic cylinder is improved and the reliability of use is improved.

[0007] Preferably, the bottom ends of the multiple groups of pressure heads match the shape of the top surfaces of the hub bolts, thereby improving the stability and convenience of press-fitting the hub bolts by the multiple groups of pressure heads.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: the brake drum is fixed on the top of the pressure bolt tooling assembly, and then the wheel hub bolts are pre-installed in the mounting hole of the brake drum. The cylinder assembly drives multiple groups of piston rods to move downward and extend through the assembly components, so that the multiple groups of piston rods push the wheel hub bolts to move downward, thereby press-fitting the wheel hub bolts onto the brake drum, so that the structure of the hydraulic cylinder is simple and the operation is reliable. When the piston rod is used to realize reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, the movement is smooth, and it can effectively solve the problems of compression damage, excessive pressing and inadequate pressing during the product pressing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is an axonometric structural diagram of the utility model;

[0010] Figure 2 This is a schematic diagram of the axonometric structure of the connection between the upper fixed plate and the upper sealing plate;

[0011] Figure 3 This is a schematic diagram of the partial axonometric structure of the connection between the first sealing ring and the piston, etc.;

[0012] Figure 4 It is a side view structural diagram of the connection between the piston rod and the piston;

[0013] Figure 5 It is an axonometric structural diagram of the connection between the cylinder assembly and the upper fixed plate, etc.

[0014] Markings in the accompanying drawings: 1. Cylinder assembly; 4. Pressure bolt tooling assembly; 5. Upper fixing plate; 6. Upper sealing plate; 7. Cylinder body; 8. Bolt; 9. First locating pin; 10. Sixth sealing ring; 11. Combined pad nitrile sealing gasket; 12. Lower end cover; 13. Second locating pin; 14. Screw; 15. Piston rod; 16. Pressure head; 17. First sealing ring; 18. Piston; 19. Second sealing ring; 20. Fixed sleeve; 21. Third sealing ring; 22. Elastic retaining ring; 23. Fourth sealing ring; 24. Guide belt; 25. Fifth sealing ring. DETAILED DESCRIPTION

[0015] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention. Example

[0016] like Figures 1 to 5 As shown, the utility model is a hydraulic oil cylinder for pressing wheel hub bolts on a brake drum, comprising a pressing bolt tool assembly 4, which is arranged on the bottom platform of the press; further comprising an assembly component, a cylinder assembly 1 and multiple groups of piston rods 15, the cylinder assembly 1 being installed above the press, and the cylinder assembly 1 and the pressing bolt tool assembly 4 being arranged relative to each other up and down, the multiple groups of piston rods 15 being slidably mounted on the cylinder assembly 1 through the assembly component, the number of the multiple groups of piston rods 15 corresponding to the number of wheel hub bolts, and a clamp for fixing the brake drum being provided on the upper portion of the pressing bolt tool assembly 4;

[0017] like Figure 2As shown, the cylinder assembly 1 includes an upper fixing plate 5, an upper sealing plate 6, a cylinder body 7, a bolt 8, a first locating pin 9, a sixth sealing ring 10, a combined pad nitrile sealing gasket 11, a lower end cover 12, a second locating pin 13 and a screw 14. The upper fixing plate 5 is connected to the top of the upper sealing plate 6 by multiple groups of bolts 8, and the bottom end of the upper sealing plate 6 is installed on the top of the cylinder body 7 through multiple groups of first locating pins 9. The sixth sealing ring 10 and multiple groups of combined pad nitrile sealing gaskets 11 are both installed at the bottom of the cylinder body 7. The top of the lower end cover 12 is connected and arranged at the bottom of the cylinder body 7 through multiple groups of second locating pins 13, and the lower end cover 12 is provided with an oil inlet and outlet. Multiple groups of screws 14 are all cooperated and installed on the lower end cover 12. Multiple groups of screws 14 are used to fix the lower end cover 12 and the cylinder body 7. Multiple groups of piston rods 15 are installed inside the cylinder body 7 through the assembly components through the lower end cover 12;

[0018] In this embodiment, the brake drum is fixed on the top of the pressure bolt tooling assembly 4, and then the wheel hub bolts are pre-installed in the mounting holes of the brake drum. The cylinder assembly 1 drives multiple groups of piston rods 15 to move downward and extend through the assembly components, so that the multiple groups of piston rods 15 push the wheel hub bolts to move downward, thereby press-fitting the wheel hub bolts onto the brake drum. The hydraulic cylinder has a simple structure and reliable operation. When the piston rod 15 is used to realize reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth, which can effectively solve the problems of compression damage, excessive pressing and inadequate pressing during product pressing. Example

[0019] On the basis of Example 1, Figure 3 As shown, a brake drum press-fit wheel hub bolt hydraulic cylinder of the utility model, the assembly component includes a pressure head 16, a first sealing ring 17, a piston 18, a second sealing ring 19, a fixed sleeve 20, a third sealing ring 21, an elastic retaining ring 22, a fourth sealing ring 23, a guide belt 24 and a fifth sealing ring 25, the third sealing ring 21 is mounted on the outer wall of the fixed sleeve 20, the fixed sleeve 20 is mounted on the lower end cover 12 and fixed by the elastic retaining ring 22, the fourth sealing ring 23, the guide belt 24 and the fifth sealing ring 25 are respectively mounted on the inner wall of the fixed sleeve 20, the piston rod 15 slides up and down through the interior of the fixed sleeve 20, the second sealing ring 19 and the piston 18 are respectively mounted on the outer wall of the piston rod 15, the first sealing ring 17 is mounted on the outer wall of the piston 18, and the pressure head 16 is mounted on the bottom end of the piston rod 15;

[0020] like Figure 3 As shown, the bottom ends of the multiple groups of pressure heads 16 match the shape of the top surface of the hub bolts;

[0021] In this embodiment, the upper fixed plate 5 is installed on the fixed surface above the press, and multiple groups of piston rods 15 are slid up and down and installed on the lower end cover 12 and the cylinder body 7 through the assembly component. When the hydraulic oil enters the cylinder body 7, the hydraulic oil drives the multiple groups of piston rods 15 to move downward through the assembly component, so that the multiple groups of piston rods 15 press the hub bolts onto the brake drum, improving the stability of use. When the assembly component installs the multiple groups of piston rods 15 on the lower end cover 12 and the cylinder body 7, the hydraulic oil enters the cylinder body 7 to push the piston 18 to move downward, so that the piston 18 drives the piston rod 15 to move downward. After the piston rod 15 moves downward, the wheel hub bolts are pressed through the multiple groups of pressing heads 16. By arranging the first sealing ring 17, the third sealing ring 21, the elastic retaining ring 22, the fourth sealing ring 23, the guide belt 24 and the fifth sealing ring 25, the sealing performance of the hydraulic cylinder is improved and the reliability of use is improved.

[0022] The utility model provides a hydraulic oil cylinder for pressing wheel hub bolts on a brake drum. When working, the brake drum is fixed on the top of the pressing bolt tooling assembly 4, and then the wheel hub bolts are pre-installed in the mounting holes of the brake drum. The cylinder assembly 1 drives multiple groups of piston rods 15 to move downward and extend through the assembly components, so that the multiple groups of piston rods 15 push the wheel hub bolts to move downward, thereby press-fitting the wheel hub bolts onto the brake drum.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hydraulic cylinder for pressing hub bolts on a brake drum, comprising a bolt pressing tool assembly (4), wherein the bolt pressing tool assembly (4) is arranged on a bottom platform of a press; wherein: The invention also includes an assembly component, an oil cylinder assembly (1) and a plurality of piston rods (15), wherein the oil cylinder assembly (1) is installed above the press, and the oil cylinder assembly (1) and the pressure bolt fixture assembly (4) are arranged relative to each other up and down, and the plurality of piston rods (15) are installed on the oil cylinder assembly (1) by sliding up and down through the assembly component, and the number of the plurality of piston rods (15) corresponds to the number of wheel hub bolts, and a clamp for fixing the brake drum is provided on the upper part of the pressure bolt fixture assembly (4).

2. A brake drum press-fit wheel hub bolt hydraulic cylinder according to claim 1, characterized in that: The oil cylinder assembly (1) comprises an upper fixing plate (5), an upper sealing plate (6), an oil cylinder body (7), bolts (8), a first locating pin (9), a sixth sealing ring (10), a combination gasket nitrile sealing gasket (11), a lower end sealing cover (12), a second locating pin (13) and a screw (14), wherein the upper fixing plate (5) is connected to the top of the upper sealing plate (6) through multiple groups of bolts (8), and the bottom end of the upper sealing plate (6) is mounted on the top of the oil cylinder body (7) through multiple groups of first locating pins (9), the sixth sealing ring (10) and multiple groups of combination gaskets (11) are connected to the upper end of the oil cylinder body (7). The nitrile sealing gaskets (11) are all installed at the bottom of the oil cylinder body (7), the top of the lower end cover (12) is connected to the bottom of the oil cylinder body (7) through multiple sets of second positioning pins (13), and the lower end cover (12) is provided with oil inlet and outlet ports, multiple sets of screws (14) are all installed on the lower end cover (12), and the multiple sets of screws (14) are used to fix the lower end cover (12) and the oil cylinder body (7), and multiple sets of piston rods (15) are installed inside the oil cylinder body (7) through the lower end cover (12) through the assembly components.

3. A brake drum press-fit wheel hub bolt hydraulic cylinder according to claim 1, characterized in that: The assembly component includes a pressure head (16), a first sealing ring (17), a piston (18), a second sealing ring (19), a fixed sleeve (20), a third sealing ring (21), an elastic retaining ring (22), a fourth sealing ring (23), a guide belt (24) and a fifth sealing ring (25), wherein the third sealing ring (21) is mounted on the outer wall of the fixed sleeve (20), the fixed sleeve (20) is mounted on the lower end cover (12) and fixed by the elastic retaining ring (22), the fourth sealing ring (23), the guide belt (24) and the fifth sealing ring (25) are respectively mounted on the inner wall of the fixed sleeve (20), the piston rod (15) slides up and down through the interior of the fixed sleeve (20), the second sealing ring (19) and the piston (18) are respectively mounted on the outer wall of the piston rod (15), the first sealing ring (17) is mounted on the outer wall of the piston (18), and the pressure head (16) is mounted on the bottom end of the piston rod (15).

4. A brake drum press-fit wheel hub bolt hydraulic cylinder according to claim 3, characterized in that: The bottom ends of the multiple groups of pressure heads (16) match the shape of the top surfaces of the hub bolts.

Images