Press-fitting machine for bottom bushing of auxiliary frame

Abstract

The auxiliary frame bottom lining pressing machine comprises a machine base, a machine frame and a supporting base, and the machine frame and the supporting base which are distributed adjacently are fixedly installed at the top of the machine base. The press-fitting device has the beneficial effects that press-fitting operation of different models and different positions can be achieved, auxiliary frame supporting is achieved through the liftable press-fitting platform while the auxiliary frame is conveyed for position positioning, it is guaranteed that force is consistent when bushings at different heights are pressed, height adjustment is achieved through driving in an air pressure mode, and the press-fitting efficiency is improved. According to the press-fitting platform, the moving speed of the press-fitting platform can be matched with the moving speed of the auxiliary frame, the stability of the press-fitting platform is ensured in a one-way locking mode, self-locking after moving is achieved through cooperation of the lifting shaft and the toothed swing rod, the press-fitting platform can stably bear impact pressure, lining conveying is achieved through the liftable feeding tray, and the service life of the press-fitting platform is prolonged. And it is ensured that the feeding position and the press-fitting platform are kept at the same height, feeding at any position is achieved, and meanwhile machining of press-fitting operation is not affected.

Description

Technical Field

[0001] The present invention relates to the field of press-fitting machines, specifically to 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 to 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 realizes 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; An adjacent distributed frame and support base are respectively fixedly installed on the top of the machine base. 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; A lifting shaft is movably sleeved inside the support base. A press-fitting platform is fixedly installed at the top of the lifting shaft. The lifting shaft is of a hollow structure and a limiting groove is provided on its inner wall. A rotating rod is rotatably connected to the top surface of the machine base inside the lifting shaft. The rotating rod is fixedly connected to a toothed swing rod, and tooth grooves are provided on the outer surface of the toothed swing rod; 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.

[0006] Preferably, a square hole for installing the feeding tray is formed in the middle of the frame. 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 fixedly connected to both ends of the feeding tray respectively.

[0007] 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 air pipe. 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.

[0008] 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.

[0009] Preferably, a Z-shaped clamping rod is rotatably connected to the far 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.

[0010] Preferably, the transmission structure is composed of a fixed sleeve. The fixed sleeve is located below the fixed pipe and 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.

[0011] Preferably, the number of the toothed swing rods is two. Inclined surfaces are provided on the adjacent surfaces of the two toothed swing rods. 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 connected to the inclined surfaces. The tops of the toothed swing rods are respectively connected to both ends of the first spring.

[0012] 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 linear distribution structure, and the tooth grooves and the limiting grooves are fitted and connected inside.

[0013] Preferably, one side of the pressing 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.

[0014] Preferably, a pressing disc is fixedly installed at the telescopic end of the hydraulic cylinder, and the pressing disc and the pressing platform are correspondingly distributed.

[0015] The beneficial effects of the present invention are: 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. 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, and uses a one-way locking method 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. 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, enabling feeding at any position without affecting the press-fitting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the semi-sectional structure of the present invention; Figure 3 For the present invention Figure 2 The partial enlarged structure schematic diagram at A in; Figure 4 It is a schematic diagram of the three-dimensional structure inside the support base of the present invention.

[0018] 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 slot; 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 pipe; 19, second spring; 20, clamping rod; 21, reset spring piece; 22, fixed sleeve; 23, air guide valve. DETAILED DESCRIPTION OF THE INVENTION

[0019] To make the objectives, features, and advantages of the present invention more apparent and understandable, the following will, in conjunction with the accompanying drawings in the embodiments of the present invention, clearly and completely describe the technical solutions 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 fall within the scope of protection of the present invention.

[0020] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0021] 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.

[0022] Please refer to Figures 1-4 As shown, a subframe bottom bushing press includes a machine base 1, a frame 2, and a support base 7; On the top of the machine base 1, a frame 2 and a support base 7 are fixedly installed adjacent to each other. A hydraulic cylinder 3 for pressing is installed on the frame 2, and a feeding tray 5 for bushing conveyance 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 base 7. A pressing 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 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 base 7 is connected to two gas-conveying air pipes 9. A guide rod 12 is movably connected inside the support base 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 base 7. The transmission structure is connected to one of the air pipes 9, and both the transmission structure and the air pipe 9 are arranged below the guide rod 12.

[0023] Further, the hydraulic cylinder 3 installed on the frame 2 is used to drive the pressing plate 4 to move downward to perform the bushing pressing operation. The subframe is fixed by a moving fixture and translated to the pressing platform 14. The pressing platform 14 rises synchronously and fits with the bottom of the subframe. At this time, the feeding bracket performs bushing feeding, and at the same time, the pressing plate 4 is coordinated to perform the pressing process.

[0024] Specifically, the press-fitting platform 14 is driven to move synchronously by the lifting shaft 13. The lifting shaft 13 is installed in the support base 7 and is driven by pneumatic means, which is more efficient than using a hydraulic transmission method. A toothed swing rod 1701 is arranged in the support base 7 and is matched with the limiting groove 1301 on the inner wall of the lifting shaft 13 to achieve self-locking after movement. When the press-fitting platform 14 bears an impact force, the toothed swing rod 1701 bears the pressure, ensuring the stability of the press-fitting platform 14. After the press-fitting is completed, the press-fitting platform 14 can be quickly reset, facilitating subsequent press-fitting operations.

[0025] A square hole for installing the feeding tray 5 is formed in the middle of the frame 2. 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.

[0026] Furthermore, the feeding tray 5 is used for transporting the bushings and keeping them at the same height as the press-fitting platform 14. When performing press-fitting operations at different positions, the bushings can be quickly loaded. The lifting of the feeding tray 5 is realized by using the cylinder 6. The distance between the press-fitting 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 cylinder 6, enabling it to be synchronized with the press-fitting platform 14.

[0027] 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 the two air pipes 9 are also fixedly connected to each other. An air inlet 11 is formed at the connection between one of the air pipes 9 and the support base 7, and the columnar guide rod 12 is fitted and sleeved inside the air inlet 11. A fixed pipe 18 is fixedly connected to the inner wall of the support base 7. The 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 base 7 through a second spring 19. The diameter of one end of the guide rod 12 close to the fixed pipe 18 is larger than that of the other end.

[0028] During operation, the air pump 8 works to make the gas pass through the air pipe 9 and enter from the air inlet 11. At this time, the air pressure ejects 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 groove 1703 on the toothed swing rod 1701 cooperates with the limiting groove 1301. When the gas enters the inside of the support base 7, the generated air pressure pushes the lifting shaft 13 and the press-fitting platform 14 to move upward. The smooth movement of the lifting shaft 13 is realized by the relative sliding between the tooth groove 1703 and the limiting groove 1301. When the movement is 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 groove 1703 and the limiting groove 1301 prevents the lifting shaft 13 from moving downward, thereby achieving stable support.

[0029] The distal end of the fixed tube 18 is rotatably connected to a Z-shaped clamping rod 20. The middle part of the clamping rod 20 is connected to the bottom of the fixed tube 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 tube 18 through a return spring piece 21, and the clamping rod 20 is arranged on one side of the transmission structure; The transmission structure consists of a fixed sleeve 22. The fixed sleeve 22 is located below the fixed tube 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.

[0030] Specifically, when air pressure is generated at the air inlet 11, the guide rod 12 moves inside the fixed tube 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. The elasticity of the return spring pushes the clamping rod 20 to rotate around its middle part, so that the clamping rod 20 is clamped inside the clamping groove 1201 to realize the limit of the guide rod 12. After continuously filling the gas and adjusting the height of the pressing platform 14 in place, it can be connected to the bottom of the subframe. After the pressing is completed, the control valve 10 on the other air pipe 9 is opened. When the gas in the support seat 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 in the support seat 7 is pumped out to reset the lifting shaft 13 for subsequent pressing operations.

[0031] The number of the toothed swing rods 1701 is two. The adjacent surfaces of the two toothed swing rods 1701 are both provided with inclined surfaces 1702. Two buffer spring pieces 1202 are fixedly connected to the surface of the guide rod 12 between the toothed swing rods 1701. The buffer spring pieces 1202 are bent structures 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 inclined structures distributed linearly, and the tooth grooves 1703 and the limiting grooves 1301 are fitted and connected inside.

[0032] Specifically, the tooth groove 1703 and the limit groove 1301 are inclined structures, which are equivalent to a ratchet and pawl structure, enabling the lifting shaft 13 to move upward smoothly. When moving downward, the limit groove 1301 abuts against the tooth groove 1703 to achieve locking. When moving downward, the guide rod 12 resets and drives the buffer spring 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 limit groove 1301 from the tooth groove 1703. At this time, the reset of the lifting shaft 13 and the pressing platform 14 is achieved.

[0033] One side of the pressing platform 14 is fixedly connected to the infrared sensor 16 through the support frame 15, and there is a spacing between the infrared sensor 16 and the feeding tray 5; the telescopic end of the hydraulic cylinder 3 is fixedly installed with a pressure plate 4, and the pressure 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 pressure plate 4 to move downward to press the bushing tightly in the subframe.

[0034] 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 can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. 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.

[0035] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; 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, characterized in that: It includes a base (1), a frame (2) and a support base (7); On the top of the base (1), a frame (2) and a support base (7) which are adjacent and distributed are fixedly installed respectively. 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 arranged below the feeding tray (5); A lifting shaft (13) is movably sleeved inside the support base (7). A press-fitting platform (14) is fixedly installed at the top end of the lifting shaft (13). The lifting shaft (13) is of a hollow structure and a limiting groove (1301) is formed on its inner wall. The top surface of the base (1) located inside the lifting shaft (13) is rotatably connected with a rotating rod (17). The rotating rod (17) is fixedly connected with a toothed swing rod (1701). And tooth grooves (1703) are formed on the outer surface of the toothed swing rod (1701); The bottom of the support base (7) is connected with two air pipes (9) for gas conveying. A guide rod (12) is movably connected inside the support base (7). The guide rod (12) is arranged between two toothed swing rods (1701). And both side walls of the guide rod (12) are attached to the side walls of the toothed swing rod (1701). A transmission structure is fixedly connected to the inner wall of the support base (7). The transmission structure is connected with one of the air pipes (9). And both the transmission structure and the air pipe (9) are arranged below the guide rod (12).

2. The subframe bottom bushing press according to claim 1, characterized in that: A square hole for installing the feeding tray (5) is formed in the middle of the frame (2). The feeding tray (5) is slidably connected with 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 with both ends of the feeding tray (5).

3. The subframe bottom bushing press according to claim 1, characterized in that: An air pump (8) is fixedly installed on the top surface of the base (1). The air pump (8) is fixedly connected with two air pipes (9). And both of the two air pipes (9) are fixedly connected with the air pipe (9). An air inlet (11) is formed at the connection of one of the air pipes (9) and the support base (7). And the inside of the air inlet (11) is fitted and sleeved with a columnar guide rod (12).

4. The subframe bottom bushing press according to claim 3, characterized in that: A fixed pipe (18) is fixedly connected to the inner wall of the support base (7). A guide rod (12) is movably sleeved inside the fixed pipe (18). And the guide rod (12) is connected with the side wall of the support base (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 thereof.

5. The subframe bottom bushing press according to claim 4, characterized in that: A Z-shaped clamping rod (20) is rotatably connected to the far 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 attached to 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 with the fixed pipe (18) through a reset elastic piece (21). And the clamping rod (20) is arranged on one side of the transmission structure.

6. 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) contacts the clamping rod (20), and the diameter of the gas guide valve (23) inside the fixed sleeve (22) is larger than the diameter of its other end.

7. The subframe bottom bushing press according to claim 1, characterized in that: 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 of 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).

8. The subframe bottom bushing press according to claim 1, characterized in that: 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 of an inclined structure with linear distribution, and the tooth grooves (1703) and the limiting grooves (1301) are fitted and connected inside.

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

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

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