A quick-clamping planar structure for an elliptical camshaft end

Abstract

This application discloses a quick-clamping planar structure for an elliptical camshaft end, relating to the field of camshaft technology. It includes a base plate with a pair of placement plates on its top surface. Each placement plate has an arc-shaped groove for engaging both ends of the camshaft. A movable block is positioned between the placement plates on the base plate, and the movable block has a pair of fixed clamping plates. One of the fixed clamping plates has a movable plate, and a guide rod extends through the fixed clamping plate. An adjusting rod is threaded onto the fixed clamping plate. The movable plate, in conjunction with the fixed clamping plate, clamps and fixes one cam of the camshaft. The combination of the fixed clamping plate, movable plate, guide rod, and adjusting rod can clamp and fix the cam in the middle of the camshaft. The increased clamping point in the middle effectively constrains the camshaft's circumferential and radial degrees of freedom, reducing minor shaking or twisting during machining or vibration, thereby improving machining accuracy and reducing dimensional deviations.

Description

Technical Field

[0001] This application relates to the field of camshaft technology, and in particular to a quick-clamping planar structure for an elliptical camshaft end. Background Technology

[0002] As a core transmission component in internal combustion engines, automated machinery, and other equipment, the manufacturing precision of the camshaft directly affects the power output and operational stability of the equipment. With the increasing demands for efficiency and precision in modern industrial mechanical systems, the complex structural design of camshafts has gradually become mainstream. This not only poses higher challenges to machining processes but also makes reliable clamping of the camshaft during machining and inspection a key technical issue.

[0003] Currently, most camshaft clamping mechanisms commonly used in industrial production employ a two-end positioning method. These mechanisms typically consist of centers, chucks, or pneumatic grippers, and achieve initial fixation by applying axial clamping force to the journals at both ends of the camshaft in conjunction with auxiliary support blocks.

[0004] Regarding the aforementioned technologies, the inventors believe that, due to the significant differences in the phase angles of each cam, it is difficult to constrain the camshaft's circumferential and radial degrees of freedom by relying solely on clamping at both ends. Under machining cutting forces or vibrations, the camshaft is prone to slight wobble or torsion, leading to dimensional deviations in the machining process. Utility Model Content

[0005] The purpose of this application is to provide a quick-clamping planar structure for the end of an elliptical camshaft, so as to improve the problem that it is difficult to constrain the circumferential and radial degrees of freedom of the camshaft by relying solely on clamping at both ends.

[0006] This application provides a planar structure for quick clamping of the end of an elliptical camshaft, employing the following technical solution:

[0007] A quick-clamping planar structure for an elliptical camshaft includes a base plate. A pair of placement plates are arranged along the length of the base plate's top surface. Each placement plate has an arc-shaped groove for engaging both ends of the camshaft. A movable block is positioned between the placement plates on the base plate. The movable block has a pair of fixed clamping plates, one of which has a movable plate. A guide rod is threaded through the fixed clamping plate. An adjusting rod, rotatably connected to the movable plate, is threaded onto the fixed clamping plate. The movable plate, in conjunction with the fixed clamping plate, clamps one cam of the fixed camshaft.

[0008] By adopting the above technical solution, the pair of placement plates and arc-shaped grooves on the base plate can achieve preliminary positioning of both ends of the camshaft. The combination of the fixed clamping plate, moving plate, guide rod and adjusting rod can clamp and fix the cam in the middle of the camshaft. Compared with the traditional method of clamping only at both ends, this structure adds a clamping point in the middle, which can effectively constrain the camshaft's circumferential and radial degrees of freedom, reduce the slight shaking or twisting under processing or vibration, thereby improving processing accuracy and reducing dimensional deviation.

[0009] Optionally, an elastic pad is provided on the side of the fixed clamp and the movable plate that are close to each other.

[0010] By adopting the above technical solution, the elastic pad can fit tightly against the cam surface, avoiding damage to the cam surface due to rigid contact; at the same time, the elastic pad has a certain degree of elasticity and friction, which can further increase the stability of clamping and ensure the processing quality.

[0011] Optionally, a threaded rod is rotatably provided between the placement plates, a driving component for driving the threaded rod to rotate is provided on one side of the placement plate, and a sliding rod is provided between the placement plates along the length of the threaded rod; the moving block is threadedly connected to the threaded rod and slidably connected to the sliding rod.

[0012] By adopting the above technical solution, the threaded rod, driving component and sliding rod between the placement plates cooperate with each other. The driving component drives the threaded rod to rotate, which can accurately control the movement of the moving block along the sliding rod direction. It can be quickly adjusted to the appropriate clamping position according to the camshaft of different specifications.

[0013] Optionally, the base plate is provided with a fixing plate on the side opposite to the placement plate. The fixing plate is provided with an elastic element, and the end of the elastic element away from the fixing plate is provided with a clamping plate that can abut against both ends of the camshaft.

[0014] By adopting the above technical solution, the fixing plate, elastic element and clamping plate set on the base plate, the elastic force of the elastic element makes the clamping plate always keep in a tight state with the two ends of the camshaft, which helps to improve the fixing stability of the camshaft.

[0015] Optionally, an arc-shaped plate adapted to the arc-shaped groove is provided on the side of the clamping plate adjacent to it, and the arc-shaped groove and the arc-shaped plate cooperate to lock and fix the two ends of the camshaft.

[0016] By adopting the above technical solution, the arc-shaped plate on the clamping plate and the arc-shaped groove of the placement plate cooperate to fix the two ends of the camshaft. The two are well-matched in shape, which can form a more stable clamping point and increase the contact area with the two ends of the camshaft. This further enhances the fixing effect on the two ends of the camshaft, reduces the risk of axial or radial movement of the camshaft during processing, and ensures the stability and accuracy of processing.

[0017] Optionally, the arc-shaped groove is provided with several anti-slip patterns.

[0018] By adopting the above technical solution, the anti-slip texture can also effectively reduce the possibility of the camshaft sliding in the arc groove, and improve the positional accuracy of the camshaft throughout the entire processing.

[0019] Optionally, a number of horizontal bars are provided through the clamping plate on the side of the placement plate opposite to the plate.

[0020] By adopting the above technical solution, the horizontal bar can guide and limit the movement of the clamping plate, restrict the offset direction of the clamping plate during the movement, and make the clamping plate move in a straight line along the direction of the horizontal bar. This avoids the clamping effect on both ends of the camshaft being affected by the wobbling or offset of the clamping plate, and improves the overall stability and reliability of the clamping structure.

[0021] Optionally, the end of the horizontal bar away from the placement plate is provided with an anti-detachment plate to prevent the clamping plate from detaching.

[0022] By adopting the above technical solution, the anti-detachment plate can prevent the clamping plate from detaching from the horizontal bar during movement, which increases the safety of the clamping structure and ensures the safety and continuity of the clamping process.

[0023] In summary, this application includes at least one of the following beneficial technical effects of the elliptical camshaft end quick-clamping planar structure:

[0024] 1. A pair of placement plates and arc-shaped grooves on the base plate enable preliminary positioning of both ends of the camshaft. The combination of the fixed clamping plate, moving plate, guide rod, and adjusting rod can clamp and fix the cam in the middle of the camshaft. Compared with the traditional method of clamping only at both ends, this structure adds a clamping point in the middle, which can effectively constrain the camshaft's circumferential and radial degrees of freedom, reduce slight shaking or twisting under processing or vibration, thereby improving processing accuracy and reducing dimensional deviations.

[0025] 2. The arc-shaped plate on the clamping plate and the arc-shaped groove on the placement plate engage and fix the two ends of the camshaft. The shapes of the two are compatible, which can form a more stable clamping point and increase the contact area with the two ends of the camshaft. This further enhances the fixing effect on the two ends of the camshaft, reduces the risk of axial or radial movement of the camshaft during processing, and ensures the stability and accuracy of processing.

[0026] 3. The horizontal bar can guide and limit the movement of the clamping plate, restricting the direction of offset of the clamping plate during the movement, so that the clamping plate can only move in a straight line along the direction of the horizontal bar, avoiding the impact of clamping plate shaking or offset on the clamping effect on both ends of the camshaft, and improving the overall stability and reliability of the clamping structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the quick-clamping planar structure at the end of the elliptical camshaft;

[0028] Figure 2 yes Figure 1 An enlarged schematic diagram of the structure at point A in the middle.

[0029] In the diagram, 1. Base plate; 2. Placement plate; 21. Arc groove; 211. Anti-slip texture; 3. Moving block; 31. Fixed clamping plate; 32. Moving plate; 33. Guide rod; 34. Adjusting rod; 35. Elastic pad; 4. Threaded rod; 41. Driving component; 42. Slide rod; 5. Fixed plate; 51. Elastic component; 52. Clamping plate; 521. Arc plate; 6. Horizontal bar; 61. Anti-detachment plate. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2 This application will be described in further detail below.

[0031] A quick-clamping planar structure for an elliptical camshaft end, as shown in the reference. Figure 1 The system includes a base plate 1. A pair of placement plates 2 are fixedly installed on the top surface of the base plate 1 along its length by welding. The placement plates 2 are machined with arc-shaped grooves 21 for the two ends of the camshaft to engage and be placed. The size of the arc-shaped grooves 21 is adapted to the journals at both ends of the camshaft, which can play a preliminary positioning role for the camshaft. At the same time, in order to increase friction and prevent the camshaft from sliding in the groove, several anti-slip textures 211 are machined in the arc-shaped grooves 21.

[0032] Reference Figure 1 In the area between the base plate 1 and the placement plates 2, a movable block 3 is provided. A threaded rod 4 is rotatably connected between the placement plates 2 via a bearing rolling connection. The threaded rod 4 serves as a transmission component and is threadedly connected to the movable block 3, driving the movable block 3 to move when it rotates. A drive component 41 for driving the threaded rod 4 to rotate is installed on one side of the placement plate 2. This drive component 41 can be a servo motor. The output end of the drive component 41 is welded and fixed to the threaded rod 4, and the moving direction of the movable block 3 is adjusted by the rotation direction of the motor.

[0033] Referring to 1, in order to ensure the smooth movement of the moving block 3, a sliding rod 42 is also provided between the placement plates 2 along the length of the threaded rod 4 by welding. The moving block 3 is provided with a through hole that matches the sliding rod 42, so that the moving block 3 is threadedly connected to the threaded rod 4 and slidably connected to the sliding rod 42.

[0034] Reference Figure 1A pair of fixed clamping plates 31 are welded onto the movable block 3. A movable plate 32 is mounted on one of the fixed clamping plates 31. A guide rod 33 extends through the fixed clamping plate 31 onto the movable plate 32, limiting its movement direction and ensuring stable movement. The fixed clamping plate 31 is threadedly connected to an adjusting rod 34. One end of the adjusting rod 34 is rotatably connected to the movable plate 32 via a bearing. Rotating the adjusting rod 34 drives the movable plate 32 to move closer to or away from the fixed clamping plate 31, thus enabling the movable plate 32 to clamp a cam on the fixed camshaft in conjunction with the fixed clamping plate 31. To avoid damaging the cam surface and increase clamping stability, elastic pads 35 are adhered to the adjacent sides of both the fixed clamping plate 31 and the movable plate 32. These elastic pads 35 can be made of rubber, providing good elasticity and anti-slip properties.

[0035] Reference Figure 1 , Figure 2 On the side of the base plate 1 opposite to the placement plate 2, a fixing plate 5 is provided by bolt connection. An elastic element 51 is welded and fixed on the fixing plate 5. The elastic element 51 can be a spring. A clamping plate 52 that can abut against both ends of the camshaft is provided by welding at the end away from the fixing plate 5. An arc plate 521 that matches the arc groove 21 is fixedly installed on the side close to the clamping plate 52. The two ends of the camshaft are fixed by the cooperation of the arc groove 21 and the arc plate 521.

[0036] Reference Figure 1 In addition, a number of horizontal rods 6 are provided through the clamping plate 52 on the side opposite to the placement plate 2. In this embodiment, two are preferred, located on both sides of the elastic member 51. The horizontal rods 6 play a guiding and limiting role to prevent the clamping plate 52 from shifting or falling out during movement. The end of the horizontal rod 6 away from the placement plate 2 is provided with an anti-detachment plate 61 to prevent the clamping plate 52 from falling out by welding.

[0037] The implementation principle of this application embodiment is as follows:

[0038] In actual use, the camshaft is first placed in the arc groove 21 of the placement plate 2. The arc groove 21 and the journal are matched and the anti-slip texture 211 is used to achieve initial positioning and anti-slip. At the same time, the elastic element 51 on the fixed plate 5 makes the arc plate 521 press against both ends of the camshaft through the clamping plate 52. The arc groove 21 is used to achieve stable clamping and adaptive adjustment of force. Then, the drive component 41 is started to drive the threaded rod 4 to rotate, which drives the moving block 3, which is threaded to the threaded rod 4 and slidably connected to the slide rod 42, to move to the appropriate position. Then, the adjusting rod 34 is rotated so that the moving plate 32 and the fixed clamping plate 31 cooperate to clamp one of the cams in the middle of the camshaft. Finally, all the components work together to achieve fast and stable clamping of the elliptical camshaft, which helps to solve the problem of unstable clamping at both ends in the prior art.

[0039] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A quick-clamping planar structure for an elliptical camshaft end, comprising a base plate (1), characterized in that: The bottom plate (1) has a pair of placement plates (2) arranged along its length on its top surface. The placement plates (2) are provided with arc-shaped grooves (21) for the two ends of the camshaft to engage and be placed. The bottom plate (1) is provided with a moving block (3) between the placement plates (2). The moving block (3) is provided with a pair of fixed clamping plates (31). One of the fixed clamping plates (31) is provided with a moving plate (32). The moving plate (32) passes through the fixed clamping plate (31) and is provided with a guide rod (33). The fixed clamping plate (31) is threadedly connected with an adjusting rod (34) that is rotatably connected to the moving plate (32). The moving plate (32) cooperates with the fixed clamping plate (31) to clamp a cam of the fixed camshaft.

2. The quick-clamping planar structure at the end of an elliptical camshaft according to claim 1, characterized in that: An elastic pad (35) is provided on the side of the fixed clamp (31) and the movable plate (32) that are close to each other.

3. The quick-clamping planar structure at the end of an elliptical camshaft according to claim 2, characterized in that: A threaded rod (4) is rotatably arranged between the placement plates (2), and a driving component (41) for driving the threaded rod (4) to rotate is provided on one side of the placement plate (2). A sliding rod (42) is arranged between the placement plates (2) along the length direction of the threaded rod (4); the moving block (3) is threadedly connected to the threaded rod (4) and slidably connected to the sliding rod (42).

4. The quick-clamping planar structure at the end of an elliptical camshaft according to claim 1, characterized in that: The base plate (1) is provided with a fixing plate (5) on the side opposite to the placement plate (2). The fixing plate (5) is provided with an elastic element (51). The end of the elastic element (51) away from the fixing plate (5) is provided with a clamping plate (52) that can abut against both ends of the camshaft.

5. The quick-clamping planar structure at the end of an elliptical camshaft according to claim 4, characterized in that: An arc plate (521) adapted to the arc groove (21) is provided on the side of the clamping plate (52) that is close to it. The arc groove (21) and the arc plate (521) cooperate to engage and fix the two ends of the camshaft.

6. The quick-clamping planar structure at the end of an elliptical camshaft according to claim 5, characterized in that: The arc-shaped groove (21) is provided with several anti-slip patterns (211).

7. The quick-clamping planar structure at the end of an elliptical camshaft according to claim 5, characterized in that: Several horizontal bars (6) are provided on the side opposite to the placement plate (2) through the clamping plate (52).

8. The quick-clamping planar structure at the end of an elliptical camshaft according to claim 7, characterized in that: The horizontal bar (6) is provided with an anti-detachment plate (61) at the end away from the placement plate (2) to prevent the clamping plate (52) from detaching.

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