Subframe Bottom Bushing Press

Abstract

The present invention discloses a subframe bottom bushing press-fitting machine, which includes a machine base, a frame and a support base. The frame and the support base are fixedly installed adjacent to each other at the top of the machine base. The advantages of the present invention are as follows: The present invention can achieve press-fitting operations for different models and different positions. While transporting the subframe for position positioning, the subframe is supported by a liftable press-fitting platform to ensure consistent force during bushing press-fitting at different heights. The height adjustment is achieved by pneumatic drive, making it adaptable to the moving speed of the subframe. Moreover, the stability of the press-fitting platform is ensured by a one-way locking method. The self-locking after movement is realized through the cooperation of the lifting shaft and the toothed swing rod, enabling the press-fitting platform to stably withstand impact pressure. The bushing is transported by a liftable feeding tray, and it is ensured that the feeding position is at the same height as the press-fitting platform, realizing feeding at any position without affecting the processing of the press-fitting operation.

Description

Technical Field

[0001] The present invention relates to the field of press-fitting machines, specifically a press-fitting machine for the subframe bottom bushing. Background Art

[0002] The subframe bottom bushing is an important component in the vehicle chassis system, mainly used to connect the subframe with the vehicle body or suspension system, playing the roles of shock absorption, buffering, and noise reduction. Rubber is the commonly used material for bushings at present, with good elasticity and durability. The performance of polyurethane is superior to that of rubber, being wear-resistant and oil-resistant, but with a higher cost. Metal bushings are used in high-strength areas and are usually used in combination with rubber or polyurethane. The subframe bottom bushing is crucial for the comfort and safety of the vehicle.

[0003] Currently, the installation of the subframe bottom bushing is completed by a press-fitting machine. Due to the different installation positions of the bushings on the subframe, when using a press-fitting machine to process different positions of the subframe, it is necessary to adjust the position and height of the subframe, resulting in differences in the force during subsequent press-fitting. It may also cause problems such as incomplete installation or excessive extrusion of the bushing due to different press-fitting degrees, and it is impossible to achieve efficient and tight installation of the subframe bottom bushing. Especially when processing subframes of different models, it is difficult to ensure the press-fitting efficiency, and for press-fitting operations at different positions, the bushing is not easily transported quickly during press-fitting, affecting the processing efficiency. Therefore, a press-fitting machine for the subframe bottom bushing is proposed for the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a press-fitting machine for the subframe bottom bushing to solve the above problems.

[0005] The present invention achieves the above purpose through the following technical solutions. The press-fitting machine for the subframe bottom bushing includes a machine base, a frame, and a support base;

[0006] The top of the machine base is fixedly installed with a frame and a support base distributed adjacent to each other. A hydraulic cylinder for press-fitting is installed on the frame, and a feeding tray for bushing transportation is installed inside the frame. An infrared sensor is provided below the feeding tray;

[0007] A lifting shaft is movably sleeved inside the support base. The top of the lifting shaft is fixedly installed with a press-fitting platform. The lifting shaft is of a hollow structure and a limiting groove is provided on its inner wall. The top surface of the machine base located inside the lifting shaft is rotatably connected with a rotating rod, and the rotating rod is fixedly connected with a toothed swing rod, and tooth grooves are provided on the outer surface of the toothed swing rod;

[0008] The bottom of the support base is connected to two air pipes for gas transportation. A guide rod is movably connected inside the support base. The guide rod is arranged between the two toothed swing rods, and both side walls of the guide rod are in contact with the side walls of the toothed swing rods. A transmission structure is fixedly connected to the inner wall of the support base. The transmission structure is connected to one of the air pipes, and both the transmission structure and the air pipe are arranged below the guide rod.

[0009] Preferably, a square hole for installing a feeding tray is formed in the middle of the frame, and the feeding tray is slidably connected to the inside of the square hole. Cylinders are fixedly installed inside the frame on both sides of the square hole, and the telescopic ends of the cylinders are respectively fixedly connected to both ends of the feeding tray.

[0010] Preferably, an air pump is fixedly installed on the top surface of the machine base. The air pump is fixedly connected to two air pipes, and both air pipes are fixedly connected to the support base. An air inlet is formed at the connection of one of the air pipes and the support base, and the inside of the air inlet is fitted and sleeved with a columnar guide rod.

[0011] Preferably, a fixed pipe is fixedly connected to the inner wall of the support base. A guide rod is movably sleeved inside the fixed pipe, and the guide rod is connected to the side wall of the support base through a second spring. One end of the guide rod close to the fixed pipe has a larger diameter than the other end.

[0012] Preferably, a Z-shaped clamping rod is rotatably connected to the distal end of the fixed pipe. The middle of the clamping rod is connected to the bottom of the fixed pipe. One end of the clamping rod is in contact with the surface of the guide rod, and a clamping groove corresponding to the clamping rod is formed at the bottom of the guide rod. The other end of the clamping rod is inclined and connected to the fixed pipe through a reset elastic sheet, and the clamping rod is arranged on one side of the transmission structure.

[0013] Preferably, the transmission structure is composed of a fixed sleeve. The fixed sleeve is located below the fixed pipe and is fixedly connected to the inner wall of the support base. A guide air valve is movably sleeved inside one end of the fixed sleeve. Both ends of the guide air valve are provided with end heads. The end head located outside the fixed sleeve is in contact with the clamping rod, and the diameter of the guide air valve located inside the fixed sleeve is larger than that of the other end.

[0014] Preferably, the number of toothed swing rods is two. The adjacent surfaces of the two toothed swing rods are both provided with inclined surfaces. Two buffer elastic sheets are fixedly connected to the surface of the guide rod between the toothed swing rods. The buffer elastic sheets are in a bent structure and are in contact with the inclined surfaces, and the tops of the toothed swing rods are respectively connected to both ends of the first spring.

[0015] Preferably, the toothed swing rods are arranged on the inner wall of the lifting shaft. The tooth grooves on the side walls of the toothed swing rods and the limiting grooves on the inner wall of the lifting shaft are both in an inclined structure distributed linearly, and the tooth grooves and the limiting grooves are fitted and connected inside.

[0016] Preferably, one side of the press-fitting platform is fixedly connected to an infrared sensor through a support frame, and a distance is formed between the infrared sensor and the feeding tray.

[0017] Preferably, a pressing disc is fixedly installed at the telescopic end of the hydraulic cylinder, and the pressing disc and the press-fitting platform are correspondingly distributed.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention can achieve press-fitting operations for different models and at different positions. While positioning the subframe during transportation, a liftable press-fitting platform is used to support the subframe, ensuring consistent force during bushing press-fitting at different heights and enabling fast and efficient press-fitting processing.

[0020] 2. The present invention uses a pneumatic drive to achieve height adjustment. It has a fast adjustment function to adapt to the moving speed of the subframe. Moreover, a one-way locking method is used to ensure the stability of the press-fitting platform. Self-locking after movement is achieved through the cooperation of the lifting shaft and the toothed swing rod, enabling the press-fitting platform to stably withstand impact pressure and ensuring the smooth progress of press-fitting processing.

[0021] 3. The present invention uses a liftable feeding tray to convey the bushings and ensures that the feeding position is at the same height as the press-fitting platform. While enabling feeding at any position, it does not affect the press-fitting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the semi-sectional structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 It is a schematic diagram of the partial enlarged structure at A in the present invention;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure inside the support base of the present invention.

[0027] In the figure: 1, machine base; 2, frame; 3, hydraulic cylinder; 4, pressure plate; 5, feeding tray; 6, air cylinder; 7, support base; 8, air pump; 9, air pipe; 10, control valve; 11, air inlet; 12, guide rod; 1201, card slot; 1202, buffer spring piece; 13, lifting shaft; 1301, limit groove; 1302, sealing ring; 14, press-fitting platform; 15, support frame; 16, infrared sensor; 17, rotating rod; 1701, toothed swing rod; 1702, inclined surface; 1703, tooth groove; 1704, first spring; 18, fixed tube; 19, second spring; 20, clamping rod; 21, reset spring piece; 22, fixed sleeve; 23, air guide valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The following further illustrates the technical solutions of the present invention in conjunction with the accompanying drawings and through specific implementation manners.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0031] Please refer to Figures 1-4 As shown, the subframe bottom bushing press includes a machine base 1, a frame 2, and a support seat 7;

[0032] The top of the machine base 1 is respectively fixedly installed with a frame 2 and a support seat 7 distributed adjacent to each other. A hydraulic cylinder 3 for press-fitting is installed on the frame 2, and a feeding tray 5 for bushing conveying is installed inside the frame 2. An infrared sensor 16 is provided below the feeding tray 5; a lifting shaft 13 is movably sleeved inside the support seat 7. A press-fitting platform 14 is fixedly installed at the top of the lifting shaft 13. A sealing ring 1302 is fixedly connected to the bottom edge of the lifting shaft 13. The lifting shaft 13 is of a hollow structure and a limiting groove 1301 is provided on its inner wall. A rotating rod 17 is rotatably connected to the top surface of the machine base 1 located inside the lifting shaft 13. The rotating rod 17 is fixedly connected to a toothed swing rod 1701, and a tooth groove 1703 is provided on the outer surface of the toothed swing rod 1701; the bottom of the support seat 7 is connected to two gas conveying pipes 9. A guide rod 12 is movably connected inside the support seat 7. The guide rod 12 is arranged between the two toothed swing rods 1701, and both side walls of the guide rod 12 are in contact with the side walls of the toothed swing rod 1701. A transmission structure is fixedly connected to the inner wall of the support seat 7. The transmission structure is connected to one of the gas pipes 9, and both the transmission structure and the gas pipe 9 are arranged below the guide rod 12.

[0033] Furthermore, the hydraulic cylinder 3 installed on the frame 2 is used to drive the pressure plate 4 to move downward to realize the bushing pressing operation. The subframe is fixed by the moving fixture and translated to the pressing platform 14. The pressing platform 14 rises synchronously and fits against the bottom of the subframe. At this time, the feeding bracket feeds the bushing, and at the same time, it cooperates with the pressure plate 4 to realize the pressing process.

[0034] Specifically, the pressing platform 14 is driven to move synchronously by the lifting shaft 13. The lifting shaft 13 is installed in the support seat 7 and is driven by a pneumatic method. Compared with the hydraulic transmission method, it is more efficient. A toothed swing rod 1701 is arranged in the support seat 7 and cooperates with the limiting groove 1301 on the inner wall of the lifting shaft 13 to realize self-locking after movement. When the pressing platform 14 bears an impact force, the toothed swing rod 1701 bears the pressure to ensure the stability of the pressing platform 14, and the pressing platform 14 can be quickly reset after the pressing is completed, which is convenient for subsequent pressing operations.

[0035] A square hole for installing the feeding tray 5 is opened in the middle of the frame 2. The feeding tray 5 is slidably connected to the inside of the square hole. Air cylinders 6 are fixedly installed inside the frame 2 on both sides of the square hole, and the telescopic ends of the air cylinders 6 are respectively fixedly connected to both ends of the feeding tray 5.

[0036] Furthermore, the feeding tray 5 is used for transporting the bushing and keeping it at the same height as the pressing platform 14. When performing pressing operations at different positions, the bushing can be quickly fed. The air cylinder 6 is used to lift the feeding tray 5. The distance between the pressing platform 14 and the feeding tray 5 is monitored by the infrared sensor 16. The signal detected by the infrared sensor 16 is connected to the controller of the air cylinder 6 to enable it to be synchronized with the pressing platform 14.

[0037] An air pump 8 is fixedly installed on the top surface of the machine base 1. The air pump 8 is fixedly connected to two air pipes 9, and both air pipes 9 are fixedly connected to the support seat 7. An air inlet 11 is opened at the connection of one of the air pipes 9 and the support seat 7, and the inside of the air inlet 11 is fitted and sleeved with a columnar guide rod 12; a fixed pipe 18 is fixedly connected to the inner wall of the support seat 7. A guide rod 12 is movably sleeved inside the fixed pipe 18, and the guide rod 12 is connected to the side wall of the support seat 7 through a second spring 19. One end of the guide rod 12 close to the fixed pipe 18 has a larger diameter than the other end.

[0038] During operation, the air pump 8 works to allow gas to pass through the air pipe 9 and enter from the air inlet 11. At this time, the air pressure pushes out the guide rod 12 and drives the buffer spring piece 1202 to contact the toothed swing rod 1701, causing the toothed swing rod 1701 to rotate against the elasticity of the first spring 1704. The tooth grooves 1703 on the toothed swing rod 1701 cooperate with the limit grooves 1301. When gas enters the inside of the support base 7, the generated air pressure pushes the lifting shaft 13 and the press-fitting platform 14 upward, and the relative sliding between the tooth grooves 1703 and the limit grooves 1301 enables the lifting shaft 13 to move smoothly. After moving in place, the gas delivery is stopped. At this time, the gas filled inside restricts the downward movement of the press-fitting platform 14, and at the same time, the self-locking of the tooth grooves 1703 and the limit grooves 1301 prevents the lifting shaft 13 from moving downward, thereby achieving stable support.

[0039] The distal end of the fixed pipe 18 is rotatably connected to a Z-shaped clamping rod 20. The middle of the clamping rod 20 is connected to the bottom of the fixed pipe 18. One end of the clamping rod 20 is in contact with the surface of the guide rod 12, and a clamping groove 1201 corresponding to the clamping rod 20 is opened at the bottom of the guide rod 12. The other end of the clamping rod 20 is inclined and connected to the fixed pipe 18 through a return spring piece 21, and the clamping rod 20 is arranged on one side of the transmission structure; the transmission structure is composed of a fixed sleeve 22. The fixed sleeve 22 is located below the fixed pipe 18 and is fixedly connected to the inner wall of the support base 7. A gas guide valve 23 is movably sleeved inside one end of the fixed sleeve 22. Both ends of the gas guide valve 23 are provided with end heads. The end head located outside the fixed sleeve 22 is in contact with the clamping rod 20, and the diameter of the gas guide valve 23 inside the fixed sleeve 22 is larger than the diameter of the other end thereof.

[0040] Specifically, when air pressure is generated at the air inlet 11, the guide rod 12 moves inside the fixed pipe 18 to compress the second spring 19. At this time, the clamping groove 1201 on the guide rod 12 moves to the position of the clamping rod 20, and the elasticity of the return spring pushes the clamping rod 20 to rotate around its middle, so that the clamping rod 20 is clamped inside the clamping groove 1201 to limit the guide rod 12. After continuously filling gas to adjust the height of the press-fitting platform 14 in place and it can contact the bottom of the subframe. After the press-fitting is completed, when the control valve 10 on another air pipe 9 is opened and the gas inside the support base 7 is pumped out, a negative pressure is formed inside the fixed sleeve 22 to move the gas guide valve 23. When the gas guide valve 23 moves, a gap is formed between it and the fixed sleeve 22. At the same time, the gas guide valve 23 pushes the clamping rod 20 to rotate to separate it from the clamping groove 1201, thereby realizing the reset of the guide rod 12. At the same time, the gas inside the support base 7 is pumped out to reset the lifting shaft 13 for subsequent press-fitting operations.

[0041] The number of the toothed swing rods 1701 is two. Inclined surfaces 1702 are provided on the adjacent surfaces of the two toothed swing rods 1701. Two buffer elastic pieces 1202 are fixedly connected to the surface of the guide rod 12 located between the toothed swing rods 1701. The buffer elastic pieces 1202 are in a bent structure and are in contact with the inclined surfaces 1702, and the tops of the toothed swing rods 1701 are respectively connected to both ends of the first spring 1704; the toothed swing rods 1701 are arranged on the inner wall of the lifting shaft 13. The tooth grooves 1703 on the side walls of the toothed swing rods 1701 and the limiting grooves 1301 on the inner wall of the lifting shaft 13 are both in an inclined linear distribution structure, and the tooth grooves 1703 and the limiting grooves 1301 are fitted and connected inside.

[0042] Specifically, the tooth grooves 1703 and the limiting grooves 1301 are in an inclined structure, which is equivalent to a ratchet and pawl structure, enabling the lifting shaft 13 to move up smoothly. When moving down, the limiting groove 1301 abuts against the tooth groove 1703 to achieve locking. When moving down, the guide rod 12 resets and drives the buffer elastic piece 1202 to separate from the toothed swing rod 1701. The elasticity of the first spring 1704 pulls the two toothed swing rods 1701 to reset, separating the limiting groove 1301 and the tooth groove 1703. At this time, the lifting shaft 13 and the pressing platform 14 are reset.

[0043] One side of the pressing platform 14 is fixedly connected to the infrared sensor 16 through the support frame 15. A spacing is formed between the infrared sensor 16 and the feeding tray 5; the telescopic end of the hydraulic cylinder 3 is fixedly installed with a pressing plate 4, and the pressing plate 4 and the pressing platform 14 are correspondingly distributed. After placing the subframe on the pressing platform 14, the bushing is placed at the pressing position, and the hydraulic cylinder 3 drives the pressing plate 4 to move down to press the bushing tightly in the subframe.

[0044] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the same elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0045] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A subframe bottom bushing press-fitting machine, characterized in that: It comprises a machine base (1), a frame (2) and a support base (7); The top of the machine base (1) is respectively fixedly mounted with adjacently distributed machine frames (2) and support seats (7), the machine frame (2) is mounted with a hydraulic cylinder (3) for press-fitting, and a feeding tray (5) for bushing conveying is mounted inside the machine frame (2), and an infrared sensor (16) is provided below the feeding tray (5); A lifting shaft (13) is movably sleeved inside the support seat (7), a press-fitting platform (14) is fixedly mounted on the top of the lifting shaft (13), the lifting shaft (13) is a hollow structure and a limiting groove (1301) is provided on the inner wall, a rotating rod (17) is rotatably connected to the top surface of the machine base (1) inside the lifting shaft (13), the rotating rod (17) is fixedly connected to the toothed swing rod (1701), and a tooth groove (1703) is provided on the outer surface of the toothed swing rod (1701); The bottom of the support seat (7) is connected to two air pipes (9) for gas delivery, the support seat (7) is movably connected to a guide rod (12) inside, the guide rod (12) is arranged between the two toothed swing rods (1701), and both side walls of the guide rod (12) are in contact with the side walls of the toothed swing rod (1701), the inner wall of the support seat (7) is fixedly connected to a transmission structure, the transmission structure is connected to one of the air pipes (9), and the transmission structure and the air pipe (9) are both arranged below the guide rod (12); An air pump (8) is fixedly mounted on the top surface of the machine base (1), the air pump (8) is fixedly connected to two air pipes (9), and the two air pipes (9) are fixedly connected to the support base (7), an air inlet (11) is provided at the connection between one of the air pipes (9) and the support base (7), and the inside of the air inlet (11) is engaged with a columnar guide rod (12), the inner wall of the support base (7) is fixedly connected to a fixed tube (18), the inside of the fixed tube (18) is movably engaged with the guide rod (12), and the guide rod (12) is connected to the side wall of the support base (7) through a second spring (19), and the diameter of one end of the guide rod (12) close to the fixed tube (18) is larger than the diameter of the other end thereof; There are two toothed swing rods (1701), and adjacent surfaces of the two toothed swing rods (1701) are provided with inclined surfaces (1702). Two buffer springs (1202) are fixedly connected to the surface of the guide rod (12) located between the toothed swing rods (1701), and the buffer springs (1202) are of a bent structure and in contact with the inclined surface (1702). The top of the toothed swing rod (1701) is respectively connected to two ends of the first spring (1704). The toothed swing rod (1701) is arranged on the inner wall of the lifting shaft (13), and the tooth groove (1703) on the side wall of the toothed swing rod (1701) and the limit groove (1301) on the inner wall of the lifting shaft (13) are both linearly distributed and inclined structures, and the tooth groove (1703) is internally engaged with the limit groove (1301).

2. The subframe bottom bushing press-fitting machine according to claim 1, wherein: A square hole for installing the feeding tray (5) is formed in the middle of the frame (2), and the feeding tray (5) is slidably connected to the inside of the square hole. Cylinders (6) are fixedly installed inside the frame (2) on both sides of the square hole, and the telescopic ends of the cylinders (6) are respectively fixedly connected to both ends of the feeding tray (5).

3. The subframe bottom bushing press according to claim 1, characterized in that: A Z-shaped clamping rod (20) is rotatably connected to the distal end of the fixed pipe (18). The middle of the clamping rod (20) is connected to the bottom of the fixed pipe (18). One end of the clamping rod (20) is in contact with the surface of the guide rod (12), and a clamping groove (1201) corresponding to the clamping rod (20) is formed at the bottom of the guide rod (12). The other end of the clamping rod (20) is inclined and connected to the fixed pipe (18) through a return spring piece (21), and the clamping rod (20) is arranged on one side of the transmission structure.

4. The subframe bottom bushing press according to claim 1, characterized in that: The transmission structure is composed of a fixed sleeve (22). The fixed sleeve (22) is located below the fixed pipe (18) and is fixedly connected to the inner wall of the support seat (7). A gas guide valve (23) is movably sleeved inside one end of the fixed sleeve (22). Both ends of the gas guide valve (23) are provided with end heads. The end head located outside the fixed sleeve (22) is in contact with the clamping rod (20), and the diameter of the gas guide valve (23) inside the fixed sleeve (22) is larger than the diameter of the other end thereof.

5. The subframe bottom bushing press-fitting machine according to claim 1, wherein: One side of the press-fitting platform (14) is fixedly connected to an infrared sensor (16) through a support frame (15), and a distance is formed between the infrared sensor (16) and the feeding tray (5).

6. The subframe bottom bushing press according to claim 1, characterized in that: A pressure plate (4) is fixedly installed at the telescopic end of the hydraulic cylinder (3), and the pressure plate (4) and the press-fitting platform (14) are correspondingly distributed.

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