Camshaft grinding tool automatic locking device

Abstract

The application discloses a camshaft grinding tool automatic locking device in the technical field of camshaft machining, which comprises a mounting seat mounted on a camshaft grinding tool, a movable seat is rotatably arranged on one side of the mounting seat through a rotating shaft, a telescopic device one for driving the movable seat to drive the rotating shaft to rotate relative to the mounting seat is arranged between the mounting seat and the movable seat, and locking assemblies for fixing camshafts are symmetrically arranged on the side of the movable seat away from the mounting seat, and the movable seat is driven by the telescopic device one to drive the camshafts fixed by the locking assemblies to rotate to a vertical posture or a horizontal posture. The camshafts are clamped on the movable seat through the locking assemblies, the telescopic device one is matched with the rotating shaft connecting the mounting seat and the movable seat, the locked camshafts can be adjusted to the horizontal posture or the vertical posture, and different grinding process requirements of the grinding tool are met.

Description

Technical Field

[0001] This invention relates to the field of camshaft machining, and more specifically to an automatic locking device for camshaft grinding fixtures. Background Technology

[0002] Currently, automatic locking devices are widely used in the grinding of camshafts using grinding fixtures. These devices are used to fix the camshaft to be processed after securing it to the grinding fixture. While most existing automatic locking devices can lock the camshaft, most can only maintain a single processing posture (horizontal or vertical). When the grinding process requires a change in workpiece angle, the machine must be stopped and the corresponding locking device manually replaced, which is cumbersome and affects the processing efficiency of the camshaft. Therefore, we propose an automatic locking device for camshaft grinding fixtures. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic locking device for camshaft grinding fixtures, which solves the technical problem that although most existing automatic locking devices can lock the camshaft, most of them can only maintain a single machining posture of the camshaft (horizontal or vertical). When the grinding process requires changing the workpiece angle, the machine must be stopped and the corresponding locking device must be replaced manually, which is cumbersome and affects the machining efficiency of the camshaft.

[0004] The present invention achieves the above objectives through the following technical solutions: An automatic locking device for a camshaft grinding fixture includes a mounting base installed on the camshaft grinding fixture. A movable seat is rotatably provided on one side of the mounting base via a rotating shaft. A telescopic device is provided between the mounting base and the movable seat to drive the movable seat to rotate the rotating shaft relative to the mounting base. A locking assembly for fixing the camshaft is symmetrically provided on the side of the movable seat away from the mounting base. The movable seat is driven by the telescopic device to rotate the camshaft fixed by the locking assembly to a vertical or horizontal position.

[0005] A further improvement is that the locking assembly includes a base on the movable seat and a top seat spaced apart on the side of the base away from the movable seat. A telescopic device 2 is embedded in the top seat, and the output end of the telescopic device 2 is connected to the top seat. An arc-shaped groove is provided on the opposite side of the base and the top seat, and an arc-shaped component for contacting the outer wall of the camshaft circumference is provided in the arc-shaped groove.

[0006] A further improvement is that fixing bolts are inserted around the mounting base, and the mounting base is connected to the camshaft grinding fixture through the fixing bolts.

[0007] A further improvement is that the mounting base has a cavity, and a counterweight is slidably disposed in the cavity. One end of the counterweight is connected to the inner wall of one side of the cavity through an elastic element. A roller is rotatably disposed in the cavity on the side away from the counterweight. A pull rope is wound around the outer wall of the roller. One end of the pull rope is connected to the counterweight, and the other end is wound around the outer wall of the roller. The pull rope is used to pull the counterweight to the side of the cavity away from the roller when the movable base rotates from the horizontal state to the vertical state.

[0008] A further improvement is that the bottom of the counterweight has a groove, and a movable plate is slidably arranged in the groove. The movable plate is connected to the bottom of the groove through an elastic element. A roller is rotatably mounted on the bottom of the movable plate through a wheel frame. The roller is in contact with the surface of the camshaft grinding fixture through a transverse opening at the bottom of the mounting base. A sliding block is arranged at intervals on one side of the inner wall of the groove and below the movable plate. A sensor for contacting the movable plate is provided on the sliding block. An alarm is provided on the mounting base and on one side of the movable base. The alarm is activated when the sensor contacts the movable plate.

[0009] A further improvement is that a limiting bracket is provided on the side of the mounting base away from the rotating shaft. The limiting bracket is fixed on the camshaft grinding fixture. A telescopic device three is provided on the limiting bracket. The output end of the telescopic device three is provided with a pressure plate for contacting the outer wall of the top of the mounting base away from the rotating shaft. When the sensor contacts the movable plate, the telescopic device three drives the pressure plate to press down on the mounting base.

[0010] A further improvement is that the sliding block is slidably disposed on one side wall of the groove, a locking pin is inserted on the sliding block, and a number of locking holes for the locking pin to be inserted are opened on one side wall of the groove.

[0011] A further improvement is that the outer wall of the arc-shaped component is provided with an arc-shaped slider, the inner wall of the arc-shaped groove is provided with an arc-shaped sliding groove that cooperates with the arc-shaped slider, and the outer walls of both sets of arc-shaped components are provided with toothed grooves that can connect with each other. When the two sets of arc-shaped components contact the outer wall of the camshaft, they together form a circular ring structure. One of the locking components has a base with a rotating device, and the output end of the rotating device has a gear that meshes with a toothed groove.

[0012] A further improvement is that the locking assembly is slidably mounted on the movable seat, and the movable seat is provided with a driving device for driving the locking assembly to move horizontally along the long side of the movable seat.

[0013] A further improvement is that a detector is provided on the base, and a reflective sheet corresponding to the detector is embedded in the outer wall of the arc-shaped component. When the detector and the reflective sheet correspond, the top of the arc-shaped component on the base is on the same plane as the top of the base, and the detector is connected to an external reminder light.

[0014] The beneficial effects of this invention are as follows: This invention clamps the camshaft onto the movable seat using a locking assembly. Furthermore, by connecting the mounting seat and the movable seat via a rotating shaft and cooperating with a telescopic device, the locked camshaft can be adjusted to either a horizontal or vertical orientation. This satisfies the needs of different grinding processes in grinding fixtures, improving the adaptability of camshaft grinding and overall production efficiency. Simultaneously, by setting a counterweight within the mounting seat cavity, it automatically moves towards the far end of the mounting seat via the rotating shaft and pull rope transmission during the transition from horizontal to vertical orientation. This real-time compensation for center of gravity shift effectively prevents one end of the mounting seat from tilting or overturning, improving the stability of the locking device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the automatic locking device of the present invention; Figure 2 For the present invention Figure 1 Structural sectional view; Figure 3 This is a schematic diagram of the locking assembly structure of the present invention; Figure 4 For the present invention Figure 3 Another perspective structural diagram; Figure 5 For the present invention Figure 2 Enlarged view of structure A in the diagram. In the diagram: 1. Mounting base; 2. Rotating shaft; 3. Movable seat; 4. Telescopic device one; 5. Locking assembly; 51. Base; 52. Top seat; 53. Telescopic device two; 54. Arc-shaped component; 55. Arc-shaped slider; 56. Detector; 57. Rotating device; 6. Drive device; 7. Fixing bolt; 8. Pull rope; 9. Counterweight; 10. Elastic component one; 11. Movable plate; 12. Elastic component two; 13. Roller; 14. Through-hole; 15. Sliding block; 16. Sensor; 17. Limit bracket; 18. Telescopic device three; 19. Pressure plate; 20. Alarm. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0017] Example 1

[0018] Please see the appendix Figure 1-4An automatic locking device for a camshaft grinding fixture includes a mounting base 1 installed on the camshaft grinding fixture. Specifically, the mounting base 1 is installed on the table of the camshaft grinding fixture adjacent to the grinding device in the grinding fixture, which will not be described in detail here. In this embodiment, fixing bolts 7 are inserted around the mounting base 1. The mounting base 1 is connected to the camshaft grinding fixture through the fixing bolts 7, which facilitates the disassembly and assembly of the device so that it can be installed on different camshaft grinding fixtures. On one side of the mounting base 1, a movable seat 3 is rotatably provided via a rotating shaft 2. Optionally, in this embodiment, a groove is provided on the right side of the mounting base 1, and the rotating shaft 2 is rotatably provided in the groove. The bottom right end of the movable seat 3 is integrally formed into a U-shaped part, which is fixedly sleeved on the outer wall of the rotating shaft 2, so that the movable seat 3 can rotate relative to the mounting base 1 to a horizontal or vertical state, thereby allowing the locked camshaft to adapt to different grinding process requirements. A telescopic device 4 is provided between the mounting base 1 and the movable base 3 to drive the movable base 3 to rotate the rotating shaft 2 relative to the mounting base 1. Optionally, the telescopic device 4 in this embodiment is a hydraulic telescopic rod, one end of which is hinged to the mounting base 1 and the other end is hinged to the movable base 3. The telescopic device 4 can drive the movable base 3 to rotate to a horizontal state or a vertical state. The movable seat 3 is symmetrically provided with locking components 5 for fixing the camshaft on the side away from the mounting seat 1. The movable seat 3 is driven by the telescopic device 4 to rotate the camshaft fixed by the locking components 5 to a vertical or horizontal position.

[0019] Preferably, the locking assembly 5 in this embodiment includes a base 51 disposed on the movable seat 3, and a top seat 52 spaced apart from the base 51 on the side away from the movable seat 3. A telescopic device 53 is embedded in the top seat 52. In this embodiment, the telescopic device 53 is such as an electric telescopic rod, and two sets can be provided. The two sets of telescopic devices 53 are symmetrically embedded on both sides of the top of the top seat 52. The output end of the telescopic device 53 is connected to the top seat 52. An arc-shaped groove is provided on the opposite side of the base 51 and the top seat 52, and an arc-shaped component 54 for contacting the outer wall of the camshaft circumference is provided in the arc-shaped groove. The inner contour of the arc-shaped component 54 is consistent with the journal shape of the camshaft to be locked. In a corresponding manner, during the locking operation, the camshaft is first placed on the arc-shaped parts 54 of the two side bases 51 by manual operation or an external robot. Then, the telescopic device 53 is activated to drive the top seat 52 to move downward, so that the arc-shaped parts 54 on the top seat 52 press against the upper part of the camshaft journal. This, together with the arc-shaped parts 54 of the base 51, forms a full-circumferential covering and locking of the camshaft. The upper and lower arc-shaped parts 54 achieve rapid positioning and uniform clamping of the camshaft, effectively dispersing the locking force, avoiding local stress concentration, ensuring the stability and positioning accuracy of the camshaft during the grinding process, and reducing the dependence on manual operation, thus improving clamping efficiency.

[0020] Preferably, the outer wall of the arc-shaped component 54 in this embodiment is provided with an arc-shaped slider 55, and the inner wall of the arc-shaped groove is provided with an arc-shaped groove that cooperates with the arc-shaped slider 55. The end of the arc-shaped groove penetrates the outer wall of the end of the arc-shaped groove. The outer walls of the two sets of arc-shaped components 54 are provided with toothed grooves that can connect with each other. When the two sets of arc-shaped components 54 contact the outer wall of the camshaft, they together form a circular ring structure, and the toothed grooves on their outer walls are connected to form a complete circular toothed groove. The diameter of the circular ring structure is adapted to the journal diameter of the camshaft. One of the locking components 5 has a base 51 with a rotating device 57. In this embodiment, the rotating device 57 is composed of a motor and a reducer. The output end of the rotating device 57 is provided with a gear that meshes with the tooth groove. When the two sets of arc-shaped parts 54 lock the camshaft and form a circular structure, the rotating device 57 can be started to drive the gear to rotate during the grinding process. By using the meshing transmission between the gear and the circular tooth groove, the entire circular structure is driven to drive the camshaft locked inside to rotate synchronously. This allows for multi-angle machining and positioning of different cam shapes during grinding, reducing the time for repeated clamping and alignment of the workpiece and effectively improving the efficiency of grinding.

[0021] Preferably, in this embodiment, the locking component 5 is slidably disposed on the movable seat 3, and the movable seat 3 is provided with a driving device 6 for driving the locking component 5 to move horizontally along the long side of the movable seat 3. Optionally, in this embodiment, the driving device 6 includes a groove formed on the top of the movable seat 3 and extending along its long side. A bidirectional screw is rotatably provided in the groove. Sliders are threaded onto the outer walls of both sides of the bidirectional screw. The sliders are slidably disposed in the groove, and the two sets of sliders are respectively connected to two locking components 5. One end of the bidirectional screw is connected to a rotary motor. By driving the bidirectional screw through the rotary motor, the two sets of locking components 5 can be moved closer or further apart by the sliders to adapt to the use of camshafts of different lengths or to adjust the locking contact position with the camshaft, thereby improving the flexibility of the device. Of course, the driving device 6 is not limited to the above-mentioned method.

[0022] Preferably, in this embodiment, the base 51 is provided with a detector 56, and the outer wall of the arc-shaped member 54 on the base 51 is embedded with a reflective sheet corresponding to the detector 56. When the detector 56 and the reflective sheet correspond, the top of the arc-shaped member 54 on the base 51 is on the same plane as the top of the base 51. The detector 56 is connected to an external reminder light. In this embodiment, both the detector 56 and the external reminder light are electrically connected to an external controller. The detector 56 can be a photoelectric sensor 16. When the arc-shaped member 54 (any arc-shaped member 54) slides to the point where its top is on the same plane as the top of the base 51, the detector 56 corresponds exactly to the reflective sheet on its outer wall. At this time, the detector 56 sends a signal to the controller, and the controller then controls the reminder light to light up. This state indicates that the arc-shaped member 54 on the base 51 and the top seat 52 are both in the initial reference position. The user can then safely control the telescopic device 2 53 to drive the top seat 52 to move upward and separate from the base 51, thereby releasing the locking state of the camshaft.

[0023] Example 2

[0024] Please see the appendix Figure 1-2 and Figure 5 Based on Embodiment 1, the mounting base 1 in this embodiment has a cavity, and a counterweight 9 is slidably mounted inside the cavity. One end of the counterweight 9 is connected to the inner wall of one side of the cavity via an elastic element 10. In this embodiment, the elastic element 10 is a spring, which is used to drive the counterweight 9 to reset when the movable base 3 returns to its lateral state. A roller is rotatably mounted on the side of the cavity away from the counterweight 9. Optionally, the roller in this embodiment can be replaced with a pulley system. A pull rope 8 is wound around the outer wall of the roller. In this embodiment, the pull rope 8 can be a steel wire rope or a polymer fiber rope. One end of the pull rope 8 is connected to the counterweight 9, and the other end is wound around the outer wall of the rotating shaft 2. The pull rope 8 is used to move the counterweight 9 when the movable base 3 returns to its lateral state. When the seat 3 rotates from the horizontal position to the vertical position, it pulls the counterweight 9 to move to the side of the cavity away from the rotating shaft 2. When the movable seat 3 rotates from the horizontal position to the vertical position, the rotating shaft 2 rotates and drives the pull rope 8. The pull rope 8 pulls the counterweight 9 through the roller shaft transmission to overcome the elastic force of the elastic element 10 and move it to the side of the cavity away from the rotating shaft 2. This adjusts the center of gravity position and effectively increases the weight of the mounting seat 1 away from the rotating shaft 2. This prevents the mounting seat 1 from tilting and overturning upwards on the side away from the rotating shaft 2 due to the shift of the center of gravity after the movable seat 3 rotates to the vertical position. This would cause damage or failure to the fixing bolt 7 connecting the mounting seat 1 away from the rotating shaft 2 and the camshaft grinding fixture, thus ensuring the stability of use.

[0025] A further improvement is that the bottom of the counterweight 9 has a groove, and a movable plate 11 is slidably mounted in the groove. The movable plate 11 is connected to the bottom of the groove by an elastic element 12. In this embodiment, the elastic element 12 can be a spring. A roller 13 is rotatably mounted on the bottom of the movable plate 11 via a wheel frame. The roller 13 fits against the surface of the camshaft grinding fixture through a transverse opening 14 at the bottom of the mounting base 1. A sliding block 15 is provided on one side of the inner wall of the groove and below the movable plate 11. A sensor 16 for contacting the movable plate 11 is provided on the sliding block 15. In this embodiment, the sensor 16 can be a pressure sensor. An alarm 20 is provided on the mounting base 1 and on one side of the movable base 3. The alarm 20 can be a buzzer alarm. In this embodiment, both the sensor 16 and the alarm 20 are electrically connected to an external controller. The alarm 20 works when the sensor 16 contacts the movable plate 11, that is, when the sensor 16 contacts the movable plate 11. When the movable plate 11 is in motion, a signal is sent to the external controller, which then controls the alarm 20 to operate. When the movable seat 3 rotates to the vertical position, the counterweight 9 moves towards the side of the mounting seat 1 away from the rotating shaft 2 under the action of the pull rope 8. At this time, the roller 13 contacts the surface of the tooling, which not only improves the stability of movement but also forms a monitoring basis. If the fixing bolt 7 on the side of the mounting seat 1 away from the rotating shaft 2 is damaged or fails, that side of the mounting seat 1 will tilt upward and create a gap with the surface of the tooling. Under the elastic force of the elastic element 12, the movable plate 11 immediately drives the roller 13 to move downward to fit the surface of the tooling. At the same time, the movable plate 11 contacts the sensor 16 on the sliding block 15. The sensor 16 transmits a signal to the controller and triggers the buzzer alarm 20 to operate, promptly reminding the operator to tighten or replace the fixing bolt 7, avoiding accidents such as tilting and overturning of the device, and greatly improving the safety of the device.

[0026] A further improvement is that a limiting bracket 17 is provided on the side of the mounting base 1 away from the rotating shaft 2. The limiting bracket 17 is fixed on the camshaft grinding fixture. A telescopic device 18 is provided on the limiting bracket 17. In this embodiment, the telescopic device 18 is an electric telescopic rod, which is electrically connected to an external controller. The output end of the telescopic device 18 is provided with a pressure plate 19 for contacting the outer wall of the top of the mounting base 1 away from the rotating shaft 2. When the sensor 16 contacts the movable plate 11, the telescopic device 18 drives the pressure plate 19 to press the mounting base 1 downward. When it detects that the mounting base 1 may be at risk of tilting, it automatically applies additional locking force, forming a double safety guarantee. This effectively prevents accidents such as the mounting base 1 tilting due to the failure of the fixing bolt 7 on the side of the mounting base 1 away from the rotating shaft 2, and ensures the safety and stability of the grinding process.

[0027] A further improvement is that the sliding block 15 is slidably disposed on one side wall of the groove, and a locking pin is inserted on the sliding block 15. Several sets of locking holes for the locking pin to be inserted are opened on one side wall of the groove. Through the cooperation of the locking pin and the locking holes of different heights, the detection position of the sensor 16 can be flexibly adjusted and reliably fixed.

[0028] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. An automatic locking device for camshaft grinding fixtures, characterized in that, The device includes a mounting base (1) installed on a camshaft grinding fixture. A movable seat (3) is rotatably provided on one side of the mounting base (1) via a rotating shaft (2). A telescopic device (4) is provided between the mounting base (1) and the movable seat (3) to drive the movable seat (3) to rotate the rotating shaft (2) relative to the mounting base (1). A locking assembly (5) for fixing the camshaft is symmetrically provided on the side of the movable seat (3) away from the mounting base (1). The movable seat (3) is driven by the telescopic device (4) to rotate the camshaft fixed by the locking assembly (5) to a vertical or horizontal position. The mounting base (1) has a cavity, and a counterweight (9) is slidably disposed in the cavity. One end of the counterweight (9) is connected to the inner wall of the cavity through an elastic element (10). A roller is rotatably disposed on the side of the cavity away from the counterweight (9). A pull rope (8) is wound around the outer wall of the roller. One end of the pull rope (8) is connected to the counterweight (9), and the other end is wound around the outer wall of the rotating shaft (2). The pull rope (8) is used to pull the counterweight (9) to the side of the cavity away from the rotating shaft (2) when the movable seat (3) rotates from the horizontal state to the vertical state. The counterweight (9) has a groove at its bottom, and a movable plate (11) is slidably disposed in the groove. The movable plate (11) is connected to the bottom of the groove through an elastic element (12). A roller (13) is rotatably disposed at the bottom of the movable plate (11) through a wheel frame. The roller (13) is in contact with the surface of the camshaft grinding fixture through a transverse opening (14) at the bottom of the mounting base (1). A sliding block (15) is disposed on one side of the inner wall of the groove and below the movable plate (11). A sensor (16) is disposed on the sliding block (15) for contacting the movable plate (11). An alarm (20) is disposed on the mounting base (1) and on one side of the movable base (3). The alarm (20) works when the sensor (16) contacts the movable plate (11).

2. The locking device according to claim 1, characterized in that, The locking assembly (5) includes a base (51) on the movable seat (3) and a top seat (52) spaced apart on the side of the base (51) away from the movable seat (3). A telescopic device (53) is embedded in the top seat (52). The output end of the telescopic device (53) is connected to the top seat (52). An arc-shaped groove is provided on the opposite side of the base (51) and the top seat (52), and an arc-shaped part (54) for contacting the outer wall of the camshaft circumference is provided in the arc-shaped groove.

3. The locking device according to claim 1, characterized in that, The mounting base (1) is provided with fixing bolts (7) inserted around its perimeter, and the mounting base (1) is connected to the camshaft grinding fixture through the fixing bolts (7).

4. The locking device according to claim 1, characterized in that, The mounting base (1) is provided with a limiting bracket (17) on the side away from the rotating shaft (2). The limiting bracket (17) is fixed on the camshaft grinding fixture. The limiting bracket (17) is provided with a telescopic device three (18). The output end of the telescopic device three (18) is provided with a pressure plate (19) for contacting the outer wall of the top of the mounting base (1) away from the rotating shaft (2). When the sensor (16) contacts the movable plate (11), the telescopic device three (18) drives the pressure plate (19) to press down on the mounting base (1).

5. The locking device according to claim 1, characterized in that, The sliding block (15) is slidably disposed on one side wall of the groove, and a locking pin is inserted on the sliding block (15). Several sets of locking holes for the locking pin to be inserted are opened on one side wall of the groove.

6. The locking device according to claim 2, characterized in that, The outer wall of the arc-shaped component (54) is provided with an arc-shaped slider (55), and the inner wall of the arc-shaped groove is provided with an arc-shaped sliding groove that cooperates with the arc-shaped slider (55). The outer walls of the two sets of arc-shaped components (54) are provided with toothed grooves that can connect with each other. When the two sets of arc-shaped components (54) contact the outer wall of the camshaft, they together form a circular ring structure. One of the locking components (5) has a base (51) with a rotating device (57) on it, and the output end of the rotating device (57) is provided with a gear that meshes with a tooth groove.

7. The locking device according to claim 6, characterized in that, The locking assembly (5) is slidably mounted on the movable seat (3), and the movable seat (3) is provided with a driving device (6) for driving the locking assembly (5) to move horizontally along the long side of the movable seat (3).

8. The locking device according to claim 7, characterized in that, The base (51) is provided with a detector (56), and the outer wall of the arc-shaped part (54) is embedded with a reflective sheet corresponding to the detector (56). When the detector (56) and the reflective sheet correspond to each other, the top of the arc-shaped part (54) on the base (51) is on the same plane as the top of the base (51), and the detector (56) is connected to an external reminder light.

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