Camshaft pressing pin limiting device

Abstract

The utility model relates to the technical field of pin pressing limiting, and discloses a cam shaft pin pressing limiting device which comprises a pin pressing machine body, a driving rail is installed on the inner bottom face of a pin pressing position of the pin pressing machine body, and a first sliding block and a second sliding block are connected to the upper surface of the driving rail in a sliding mode. A driving rail is installed on a pin pressing machine body and drives a first sliding block and a second sliding block to move, a supporting shaft on the second sliding block abuts against one end of a cam shaft, a threaded abutting rod on the first sliding block abuts against the other end of the cam shaft, and then the cam shaft can be driven to rotate through a rotating motor; the driving rail is matched with the first sliding block and the second sliding block to drive the cam shaft to linearly move, so that when a pin is pressed on the cam shaft, the cam shaft is clamped and limited through the threaded abutting rod and the supporting shaft and is matched with the rotating motor and the driving rail to drive the cam shaft to rotate and move, pin pressing at different positions is achieved, the overall structure is simple, use is convenient, and practicability is high. The camshaft is stably limited and quickly pressed, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pin pressing and limiting, and particularly relates to a camshaft pin pressing and limiting device. Background Technique

[0002] The camshaft, as a core component in the intake and exhaust systems of internal combustion engines, functions to control the opening and closing timing of valves through rotating cams, thereby regulating the intake and exhaust processes of cylinders. This precision mechanical component has a decisive impact on the power output, fuel economy, emission performance, and overall service life of the engine, and is mainly composed of cams and a shaft rod.

[0003] When the existing cams and shaft rods are combined into a camshaft, the cam needs to be sleeved on the shaft rod first. There is a certain interference fit between the cam and the shaft rod to pre-fix the cam on the shaft rod. Corresponding pin holes are provided on both the cam and the shaft rod, and then a pin is pressed into the pin holes on the cam and the shaft rod through a pin pressing machine to complete the assembly and installation of the camshaft. However, when the existing camshaft is assembled, there is a lack of a limiting structure for the shaft rod, relying entirely on manual operation, resulting in low pin pressing efficiency, low automation level, and inconvenience in pin installation. For this reason, a camshaft pin pressing and limiting device is proposed. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a camshaft pin pressing and limiting device, which limits and presses the pins of the camshaft with high pin pressing efficiency.

[0005] To achieve the above object, the utility model provides the following technical solution: A camshaft pin pressing and limiting device includes a main body of a pin pressing machine. A driving rail is installed on the inner bottom surface at the pin pressing position of the main body of the pin pressing machine. The upper surface of the driving rail is slidably connected with a first slider and a second slider. The driving rail drives the first slider and the second slider to linearly move. A rotating motor is installed on the upper surface of the first slider. The output end of the rotating motor is fixedly connected with a threaded sleeve. The inner wall of the threaded sleeve is rotatably connected with a threaded abutting rod. A supporting seat is fixedly connected to the upper surface of the second slider. A supporting shaft is rotatably connected to the side wall of the supporting seat. The axis of the supporting shaft and the axis of the threaded abutting rod are located on the same horizontal plane. A supporting unit for supporting the camshaft and a positioning unit for positioning the camshaft are installed on the upper surface of the driving rail.

[0006] Preferably, the driving rail includes a sliding rail installed on the main body of the pin pressing machine. A chute is provided on the upper surface of the sliding rail. A threaded rod is rotatably connected in the chute. One end of the sliding rail is installed with a driving motor. The output end of the driving motor penetrates into the chute and is fixedly connected with one end of the threaded rod. The outer wall of the threaded rod is threadedly connected with a fixed screw sleeve and an adjusting screw block. The fixed screw sleeve and the adjusting screw block are respectively installed on the bottom surface of the first slider and the side wall of the second slider.

[0007] Preferably, an installation groove is formed in the side wall of the second slider, the adjusting screw block is movably installed in the installation groove through a bolt, and the lower end of the adjusting screw block is threadedly connected to the outer wall of the threaded rod.

[0008] Preferably, the supporting unit includes two cylinders installed on the upper surface of the slide rail, and a supporting plate is fixedly connected to the end faces of the movable ends of the two cylinders. The supporting plate corresponds to the pin pressing part of the pin press body.

[0009] Preferably, a hexagonal ring is fixedly connected to the outer wall of the threaded abutting rod, and the diagonal length of the outer wall of the hexagonal ring is greater than the end face diameter of the threaded sleeve.

[0010] Preferably, the positioning unit includes a third slider slidably connected to the upper surface of the slide rail. An adjusting groove is formed in the upper surface of the third slider. A bidirectional lead screw is rotatably connected in the adjusting groove. One end of the bidirectional lead screw penetrates outside the third slider and is fixedly connected to a turning handle. Two adjusting blocks that are both slidably connected to the inner wall of the adjusting groove are threadedly connected to the outer wall of the bidirectional lead screw. Clamping blocks are fixedly connected to the upper end faces of the two adjusting blocks. Clamping grooves are formed in the adjacent faces of the two clamping blocks. The two clamping grooves are respectively in the structures of "<" and ">".

[0011] Preferably, rotating grooves are formed in the inner walls on both sides of the clamping groove, and roller slides are rotatably connected in the rotating grooves.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] 1. By installing a driving rail on the pin press body, the driving rail drives the first slider and the second slider to move. The supporting shaft on the second slider abuts against one end of the camshaft, and the threaded abutting rod on the first slider abuts against the other end of the camshaft. Furthermore, the camshaft can be driven to rotate by a rotating motor, and the driving rail cooperates with the first slider and the second slider to drive the camshaft to linearly move. When pinning the camshaft, the camshaft is clamped and restricted by the threaded abutting rod and the supporting shaft, and the rotating motor and the driving rail are used to drive the camshaft to rotate and move, realizing pinning at different positions. The overall structure is simple, easy to use, stably restricts the camshaft and quickly pins it, improving the practicability.

[0014] 2. By installing a positioning unit on the driving rail, the camshaft can be positioned, and the axis of the camshaft is adjusted to be on the same horizontal plane as the threaded abutting rod and the supporting shaft. Furthermore, it is convenient to position and restrict the camshaft, enabling the pin press body to stably and accurately pin the camshaft.

[0015] Other features and advantages of the present utility model will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the specification, claims, and drawings. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the driving rail of the present utility model;

[0018] Figure 3 It is a schematic diagram of the connection structure of the second slider, the support unit and the slide rail of the present utility model;

[0019] Figure 4 It is a schematic diagram of the connection structure of the first slider and the slide rail of the present utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the positioning unit of the present utility model.

[0021] In the figure: 1. Main body of the pin press; 2. Driving rail; 21. Slide rail; 22. Chute; 23. Driving motor; 24. Threaded rod; 25. Adjusting screw block; 26. Fixed screw sleeve; 3. First slider; 4. Second slider; 5. Positioning unit; 51. Third slider; 52. Adjusting groove; 53. Bidirectional lead screw; 54. Wrench; 55. Adjusting block; 56. Clamping block; 57. Rotating groove; 58. Slide roller; 59. Clamping groove opening; 6. Support unit; 61. Support plate; 62. Cylinder; 7. Support seat; 8. Support shaft; 9. Installation groove; 10. Rotating motor; 11. Threaded sleeve; 12. Threaded abutting rod; 13. Hexagonal ring. Detailed Description of the Preferred Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 - 5, the camshaft pin pressing and limiting device of this embodiment includes a pin pressing machine main body 1. An inner bottom surface at the pin pressing part of the pin pressing machine main body 1 is provided with a driving rail 2. The upper surface of the driving rail 2 is slidably connected with a first slider 3 and a second slider 4. The driving rail 2 drives the first slider 3 and the second slider 4 to linearly move. The upper surface of the first slider 3 is provided with a rotating motor 10. The output end of the rotating motor 10 is fixedly connected with a threaded sleeve 11. The inner wall of the threaded sleeve 11 is rotatably connected with a threaded abutting rod 12. The upper surface of the second slider 4 is fixedly connected with a support seat 7. The side wall of the support seat 7 is rotatably connected with a support shaft 8. The axis of the support shaft 8 and the threaded abutting rod 12 are located on the same horizontal plane. The upper surface of the driving rail 2 is provided with a support unit 6 for supporting the camshaft and a positioning unit 5 for positioning the camshaft.

[0024] As Figures 1 - 4 shown, the structure of the camshaft pin pressing and limiting device in the present utility model is similar to that of the existing camshaft pin pressing and limiting device. The main improvement point of the present utility model lies in the pin pressing and limiting of the camshaft, with high pin pressing efficiency. When the present utility model needs to insert a pin between the cam and the shaft rod on the camshaft, first, the cam is sleeved at the specified position of the shaft rod, and the cam is restricted to a certain extent through the interference fit between the two. Then, one end of the shaft rod is abutted against the support shaft 8, and the support seat 7 supports the support shaft 8. Rotate the threaded abutting rod 12. The threaded abutting rod 12 rotates with the threaded sleeve 11, and then the threaded abutting rod 12 moves outward from the threaded sleeve 11, so that one end of the threaded abutting rod 12 abuts against the other end of the shaft rod. At this time, start the rotating motor 10 to work. The rotating motor 10 drives the threaded abutting rod 12 to rotate through the threaded sleeve 11. The rotation of the threaded abutting rod 12 drives the shaft rod to rotate. The shaft rod drives the support shaft 8 to rotate on the support seat 7, and the shaft rod drives the angle of the cam on its outer wall. The rotation direction of the output shaft of the rotating motor 10 is the same as the rotation direction when the threaded abutting rod 12 moves outward from the threaded sleeve 11. Then, drive the first slider 3 and the second slider 4 to move through the driving rail 2. The first slider 3 drives the rotating motor 10 to move, and the second slider 4 drives the support shaft 8 to move through the support seat 7. Thus, the threaded abutting rod 12 and the support shaft 8 drive the camshaft to move, so that the pin hole on the cam is aligned with the pin pressing part of the pin pressing machine main body 1. At this time, pin pressing can be carried out. After the pin pressing is completed, continue to move and rotate the camshaft, and then carry out pin pressing at the next place, and so on. By restricting, moving and rotating the camshaft, a convenient and efficient pin pressing process for the camshaft is realized, improving the practicability.

[0025] As Figures 1 - 4As shown in the figure, the driving rail 2 includes a slide rail 21 installed on the main body 1 of the pin press. A chute 22 is provided on the upper surface of the slide rail 21. A threaded rod 24 is rotatably connected in the chute 22. One end of the slide rail 21 is provided with a driving motor 23. The output end of the driving motor 23 penetrates into the chute 22 and is fixedly connected to one end of the threaded rod 24. A fixed nut 26 and an adjusting block 25 are threadedly connected to the outer wall of the threaded rod 24. The fixed nut 26 and the adjusting block 25 are respectively installed on the bottom surface of the first slider 3 and the side wall of the second slider 4. When it is necessary to drive the camshaft to move, by controlling the driving motor 23 to work, the driving motor 23 drives the threaded rod 24 to rotate in the chute 22. The threaded rod 24 drives the fixed nut 26 and the adjusting block 25 to move. The fixed nut 26 and the adjusting block 25 slide in the chute 22. The fixed nut 26 and the adjusting block 25 respectively drive the first slider 3 and the second slider 4 to slide on the outer wall of the slide rail 21, so as to drive the support shaft 8 and the threaded abutting rod 12 to move and drive the camshaft to move. The structure is simple and the movement is convenient.

[0026] As Figure 2 and Figure 3 shown in the figure, an installation groove 9 is provided on the side wall of the second slider 4. The adjusting block 25 is movably installed in the installation groove 9 through a bolt. The lower end of the adjusting block 25 is threadedly connected to the outer wall of the threaded rod 24. The adjusting block 25 is in a block shape, and an arc-shaped notch is provided at its lower end. A thread matching the threaded rod 24 is provided in the arc-shaped notch. Thus, the bolt for fixing the adjusting block 25 can be loosened and taken out from the installation groove 9. At this time, the second slider 4 can be moved, and then the distance between the second slider 4 and the first slider 3 can be adjusted, so that the distance between the support shaft 8 and the threaded abutting rod 12 is adjustable. After the adjustment is completed, the adjusting block 25 is reinserted into the installation groove 9, and the adjusting block 25 is threadedly connected to the threaded rod 24. Then, the adjusting block 25 is fixed with a bolt. At this time, the driving motor 23 can drive the first slider 3 and the second slider 4 to move synchronously through the threaded rod 24 in cooperation with the fixed nut 26 and the adjusting block 25, so as to adapt to different lengths of camshafts and limit the pin pressing through the support shaft 8 and the threaded abutting rod 12, improving the adaptability.

[0027] As Figure 3 shown in the figure, the support unit 6 includes two cylinders 62 installed on the upper surface of the slide rail 21. The end faces of the movable ends of the two cylinders 62 are fixedly connected together with a support plate 61. The support plate 61 corresponds to the pin pressing part of the main body 1 of the pin press. When the main body 1 of the pin press performs pin pressing, the two cylinders 62 are started to drive the support plate 61 to rise. The support plate 61 abuts against the lower side of the camshaft, and the support plate 61 is located directly below the position where the main body 1 of the pin press applies downward pressure to the camshaft. Thus, when the main body 1 of the pin press presses the camshaft, through the support of the support plate 61, the camshaft is prevented from moving downward and bending, improving the practicability. After the pin pressing is completed, the cylinder 62 drives the support plate 61 to move downward so that the support plate 61 does not block the movement and rotation of the camshaft.

[0028] As Figure 4 shown, a hexagonal ring 13 is fixedly connected to the outer wall of the threaded abutting rod 12, and the diagonal length of the outer wall of the hexagonal ring 13 is greater than the end face diameter of the threaded sleeve 11; by putting a wrench on the outer wall of the hexagonal ring 13 and rotating it, the threaded abutting rod 12 is driven to rotate inside the threaded sleeve 11, which is convenient for rotating the threaded abutting rod 12, and thus convenient for clamping, limiting and loosening the camshaft.

[0029] As Figure 2 and Figure 5 shown, the positioning unit 5 includes a third slider 51 slidably connected to the upper surface of the slide rail 21. An adjustment groove 52 is formed in the upper surface of the third slider 51. A bidirectional lead screw 53 is rotatably connected inside the adjustment groove 52. One end of the bidirectional lead screw 53 penetrates outside the third slider 51 and is fixedly connected to a turning handle 54. Two adjustment blocks 55 that are both slidably connected to the inner wall of the adjustment groove 52 are threadedly connected to the outer wall of the bidirectional lead screw 53. Clamping blocks 56 are fixedly connected to the upper end faces of the two adjustment blocks 55. Clamping slots 59 are formed in the adjacent faces of the two clamping blocks 56. The two clamping slots 59 are respectively in the structures of "<" and ">"; when pressing a pin on the camshaft, first move the third slider 51 so that it is near the middle of the camshaft. At this time, put the shaft part of the camshaft between the two clamping blocks 56, and rotate the turning handle 54. The turning handle 54 drives the bidirectional lead screw 53 to rotate. The bidirectional lead screw 53 drives the two adjustment blocks 55 to slide in the adjustment groove 52 and approach each other. The two adjustment blocks 55 respectively drive the two clamping blocks 56 to approach each other. The two clamping blocks 56 guide and clamp the shaft of the camshaft through the clamping slots 59 on their outer walls, so that the axis of the shaft of the camshaft is on the same horizontal plane as the axes of the threaded sleeve 11 and the support shaft 8. At this time, by rotating the threaded abutting rod 12 in cooperation with the support shaft 8, the camshaft can be clamped and restricted, so that when the camshaft is rotated, the multiple pin holes on the camshaft will not deviate from the pin pressing position of the pin press main body 1 due to the rotation angle, which is convenient for positioning and restricting the camshaft, and enables the pin press main body 1 to perform stable and accurate pin pressing on the camshaft.

[0030] As Figure 5 shown, rotating grooves 57 are formed in both inner walls of the clamping slot 59, and sliding rollers 58 are rotatably connected inside the rotating grooves 57; when the clamping block 56 clamps the camshaft, the sliding rollers 58 on the inner wall of the clamping slot 59 are used to clamp the camshaft. The sliding rollers 58 and the rotating grooves 57 can rotate, thereby controlling the force for clamping the camshaft. When the camshaft is rotated, the camshaft drives and slides between the multiple sliding rollers 58. During the process of pressing a pin on the camshaft, it is not necessary to cancel the clamping of the camshaft by the clamping block 56, which improves the support strength for the camshaft and is more convenient to use.

[0031] Implementation steps in this embodiment: When inserting a pin between the cam and the shaft rod on the camshaft, first sleeve the cam on the designated position of the shaft rod, and impose a certain restriction on the cam through the interference fit between the two. Then, abut one end of the shaft rod against the support shaft 8, and place the shaft rod part of the camshaft between the two clamping blocks 56. Rotate the turning handle 54, and the turning handle 54 drives the bidirectional lead screw 53 to rotate. The bidirectional lead screw 53 drives the two adjusting blocks 55 to slide and approach each other in the adjusting groove 52. The two adjusting blocks 55 respectively drive the two clamping blocks 56 to approach each other, and use the rollers 58 on the inner wall of the clamping groove 59 to clamp the camshaft. The multiple rollers 58 position the camshaft. The axis of the shaft rod of the camshaft is on the same horizontal plane as the axes of the threaded sleeve 11 and the support shaft 8. Rotate the threaded abutting rod 12, and the threaded abutting rod 12 rotates with the threaded sleeve 11, and then the threaded abutting rod 12 moves outward from the threaded sleeve 11, so that one end of the threaded abutting rod 12 abuts against the other end of the shaft rod. At this time, start the rotation motor 10 to work. The rotation motor 10 drives the threaded abutting rod 12 to rotate through the threaded sleeve 11. The threaded abutting rod 12 rotates to drive the shaft rod to rotate. The shaft rod drives the support shaft 8 to rotate on the support seat 7. The shaft rod drives the angle of the cam on its outer wall. By controlling the driving motor 23 to work, the driving motor 23 drives the threaded rod 24 to rotate in the chute 22. The threaded rod 24 drives the fixed nut 26 and the adjusting nut 25 to move. The fixed nut 26 and the adjusting nut 25 slide in the chute 22. The fixed nut 26 and the adjusting nut 25 respectively drive the first slider 3 and the second slider 4 to slide on the outer wall of the slide rail 21. The first slider 3 drives the rotation motor 10 to move. The second slider 4 drives the support shaft 8 to move through the support seat 7. Thus, the threaded abutting rod 12 and the support shaft 8 drive the camshaft to move, so that the pin hole on the cam is aligned with the pin pressing place of the pin pressing machine main body 1. At this time, the two cylinders 62 are started, driving the support plate 61 to rise. The support plate 61 abuts against the lower side of the camshaft. The support plate 61 supports the pin pressing place of the camshaft. At this time, the pin pressing machine main body 1 can perform pin pressing. After the pin pressing is completed, the cylinder 62 drives the support plate 61 to move downward, so that the support plate 61 does not block the movement and rotation of the camshaft, and continue to move and rotate the camshaft, and then perform pin pressing on the next place, and so on. By restricting, moving and rotating the camshaft, a convenient and efficient pin pressing process for the camshaft is realized.

[0032] Among them, the rotation motor 10 and the driving motor 23 mentioned above can both be purchased on the market. They belong to mature technologies and have been fully disclosed, so they are not repeated in the specification. The rotation motor 10 and the driving motor 23 are equipped with power connection lines, and they are electrically connected to the external main controller and the 220V phase voltage (or 380V line voltage) through the power lines. And the main controller can be a conventional known device such as a computer that plays a control role.

[0033] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A camshaft press pin limiting device, comprising a press pin machine main body (1), characterized in that, Inside the inner bottom surface of the pin pressing part of the pin pressing machine main body (1), a driving rail (2) is installed. The upper surface of the driving rail (2) is slidably connected with a first slider (3) and a second slider (4). The driving rail (2) drives the first slider (3) and the second slider (4) to move linearly. The upper surface of the first slider (3) is installed with a rotary motor (10). The output end of the rotary motor (10) is fixedly connected with a threaded sleeve (11). The inner wall of the threaded sleeve (11) is rotatably connected with a threaded abutting rod (12). The upper surface of the second slider (4) is fixedly connected with a support seat (7). The side wall of the support seat (7) is rotatably connected with a support shaft (8). The axis of the support shaft (8) and the threaded abutting rod (12) are located on the same horizontal plane. The upper surface of the driving rail (2) is installed with a support unit (6) for supporting the camshaft and a positioning unit (5) for positioning the camshaft.

2. The camshaft pin limiting device according to claim 1, characterized in that, The driving rail (2) includes a slide rail (21) installed on the pin pressing machine main body (1). A chute (22) is opened on the upper surface of the slide rail (21). A threaded rod (24) is rotatably connected in the chute (22). One end of the slide rail (21) is installed with a driving motor (23). The output end of the driving motor (23) penetrates into the chute (22) and is fixedly connected with one end of the threaded rod (24). The outer wall of the threaded rod (24) is threadedly connected with a fixed screw sleeve (26) and an adjusting screw block (25). The fixed screw sleeve (26) and the adjusting screw block (25) are respectively installed on the bottom surface of the first slider (3) and the side wall of the second slider (4).

3. The camshaft pin limiting device according to claim 2, characterized in that, An installation groove (9) is opened on the side wall of the second slider (4). The adjusting screw block (25) is movably installed in the installation groove (9) by bolts. The lower end of the adjusting screw block (25) is threadedly connected with the outer wall of the threaded rod (24).

4. A camshaft press pin limiting device according to claim 3, characterized in that, The support unit (6) includes two cylinders (62) installed on the upper surface of the slide rail (21). The end faces of the movable ends of the two cylinders (62) are fixedly connected together with a support plate (61). The support plate (61) corresponds to the pin pressing part of the pin pressing machine main body (1).

5. The camshaft pin limiting device according to claim 1, wherein, A hexagonal ring (13) is fixedly connected to the outer wall of the threaded abutting rod (12). The diagonal length of the outer wall of the hexagonal ring (13) is greater than the end face diameter of the threaded sleeve (11).

6. The camshaft press pin limiting device according to claim 1, characterized in that, The positioning unit (5) includes a third slider (51) slidably connected to the upper surface of the slide rail (21). An adjusting groove (52) is opened on the upper surface of the third slider (51). A bidirectional lead screw (53) is rotatably connected in the adjusting groove (52). One end of the bidirectional lead screw (53) penetrates outside the third slider (51) and is fixedly connected with a turning handle (54). The outer wall of the bidirectional lead screw (53) is threadedly connected with two adjusting blocks (55) both slidably connected to the inner wall of the adjusting groove (52). The upper end faces of the two adjusting blocks (55) are fixedly connected with clamping blocks (56). Clamping grooves (59) are opened on the adjacent faces of the two clamping blocks (56). The two clamping grooves (59) are respectively in the "<” and ">” structures.

7. The camshaft press pin limiting device according to claim 6, characterized in that Rotating grooves (57) are opened on both inner walls of the clamping groove (59). A sliding roller (58) is rotatably connected in the rotating groove (57).

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