Cam ejection universal joint mechanism

Abstract

The utility model discloses a cam ejection universal joint mechanism, and relates to the field of mechanical ejection, in particular to the cam ejection universal joint mechanism. Comprising a first cam, a roller, a connecting rod, a universal joint and an ejector rod, the first cam rotates around a first rotating shaft, the roller is fixedly connected with the connecting rod through a roller fixing seat, and the cam rotates to enable the roller to move up and down to drive the connecting rod to rotate; the other end of the connecting rod is in sliding connection with the connector so that the universal joint can drive the ejector rod to move up and down, the connecting rod rotates to drive the ejector rod to move up and down, a limiting hole is formed in the connecting rod, the roller fixing base is detachably connected to the limiting hole, and the roller fixing base is provided with a fixing device. According to the cam jacking universal joint mechanism, the connecting mode is improved, the idler wheels are convenient to disassemble and replace, the bearing capacity is improved through the universal joint, the utilization rate is increased, and the cam jacking universal joint mechanism has multiple degrees of freedom.

Description

Technical Field

[0001] A cam-mounted universal joint mechanism is disclosed, relating to the field of mechanical ejection, and particularly to a cam-mounted universal joint mechanism. Background Technology

[0002] In related technologies, the connecting rod and roller are integrated into the top-loading mechanism. When the roller malfunctions or wears and needs replacement or repair, the connecting rod must first be disassembled. However, the connecting rod itself has a complex connection structure, and the disassembly process is cumbersome. After disassembling the connecting rod and replacing the roller, the connecting rod must be reinstalled, increasing labor costs and increasing the risk of incorrect installation. Therefore, the fixed connection between the roller and the connecting rod has significant limitations and drawbacks. Utility Model Content

[0003] In order to overcome the shortcomings of related technologies, this application provides a cam ejector universal joint mechanism.

[0004] A cam-driven universal joint mechanism includes a first cam, a roller, a connecting rod, a universal joint, and a push rod. Multiple first cams rotate around a first rotating shaft. The roller is fixedly connected to the connecting rod via a roller fixing seat. Rotation of the first cam causes the roller to move up and down, which in turn drives the connecting rod to rotate. One end of each connecting rod rotates around a second rotating shaft, and the other end of the connecting rod slides into a joint, causing the universal joint to drive the push rod to move up and down. The top of the joint is fixedly connected to the bottom of the universal joint, and the top of the universal joint is fixedly connected to the bottom of the push rod. Rotation of the connecting rod drives the push rod to move up and down. A limit hole is provided on the connecting rod, and the roller fixing seat is detachably connected to the limit hole. The roller fixing seat is equipped with a fixing device for fixing the roller; removing the roller only requires removing the roller fixing seat, without removing the connecting rod.

[0005] Furthermore, the universal joint is configured as a ball cage type universal joint, with a ball head and a ball head fixing seat inside. The ball head is made of tempered steel and has undergone annealing treatment.

[0006] Furthermore, the ball head retainer is made of Cr12 material.

[0007] Furthermore, the ball head size is set to a diameter of 32mm.

[0008] Furthermore, the ball head retainer is equipped with a removable gasket.

[0009] Furthermore, a second cam is also provided on the second rotating shaft, and the initial assembly direction of the second cam is opposite to that of the first cam.

[0010] Furthermore, a cylinder is installed under the connecting rod to pull the connecting rod down.

[0011] Furthermore, one end of the cylinder is hinged to the bottom of the connecting rod, and the other end is hinged to the base.

[0012] Furthermore, the cam ejector universal joint mechanism is also equipped with a shaft fixing seat.

[0013] Furthermore, the connector and the connecting rod are connected by a third rotating shaft, and the connector can rotate around the third rotating shaft at a certain angle.

[0014] This application includes at least one of the following beneficial technical effects:

[0015] 1. In this application, the roller is connected to the connecting rod via a roller fixing seat. The roller fixing seat is detachably connected to the connecting rod, which improves the connection method. When replacing or repairing the roller, it is not necessary to first disassemble and reinstall the connecting rod, thereby reducing labor costs and increasing the utilization rate of the connecting rod.

[0016] 2. The position of the connecting rod and the first cam is set to form a relative fit between the first cam and the roller. The first cam rotates to make the roller move up and down.

[0017] 3. The position of the roller on the connecting rod has a degree of freedom and affects the lifting amount of the entire cam ejector universal joint mechanism. When the first cam stroke remains unchanged, a 1mm change in the position of the fixed connection between the connecting rod and the roller can cause the lifting amount of the entire cam ejector universal joint mechanism to change several times.

[0018] 4. This application utilizes the rotation of the first cam to convert the vertical movement of the push rod. The rotation of the first cam generates displacement, which, in conjunction with the length of the connecting rod, causes the push rod to move vertically. When the position of the roller is fixed, the ratio of the eccentricity of the first cam to the vertical movement of the push rod is approximately 4 times. By setting an appropriate connecting rod length, the joint can swing at a suitable angle, thus avoiding excessive bending stress.

[0019] 5. In related technologies, the connecting rod in the feeding mechanism uses a sliding connection, allowing the joint to rotate at an angle, thereby moving the feeding rod up and down. This method requires excessively high precision in the fit between mechanisms, and the joint damage rate is high during debugging, prolonging the debugging time. Furthermore, multiple joint replacements are required over long-term use. This application avoids the sliding connection of the connecting rod in related feeding mechanisms, which causes the joint to rotate and drive the feeding rod. It independently designs a universal joint mechanism that uses a combination of sliding and rotary connections to enable the feeding rod to move up and down. This increases the degree of freedom, reduces the precision required for the fit, shortens the debugging time, avoids multiple joint replacements, and reduces manual debugging costs.

[0020] 6. Standard universal joints have insufficient load-bearing capacity, and the ball joints in related technologies are made of ordinary steel. This application improves the ball joint by using tempered steel and annealing it to enhance performance. In related technologies, the ball joint mounting base uses rubber or similar soft materials. This application improves the ball joint mounting base by using Cr12, a hard material that improves tensile strength. The ball joint size is increased to a diameter of 32mm, allowing the contact surface between the ball joint and the mounting base to withstand a tensile force of 1.5 tons, increasing the tensile strength of the universal joint. This self-made universal joint increases its load-bearing capacity and extends its service life.

[0021] 7. This application incorporates a cylinder to pull the connecting rod downwards. During the resetting of the connecting rod, to prevent the bottom rod from failing to return in time, the cylinder assists in the return, reducing the probability of erratic processing cycles.

[0022] 8. A shaft fixing seat has been added to the middle of the cam ejector universal joint mechanism. Because the first and second rotating shafts are relatively long, they are prone to deformation after prolonged use. Adding a shaft fixing seat in the middle can increase the service life of the shafts, and the installation of the shaft fixing seat does not affect the normal installation of the shafts.

[0023] 9. The overall structure of this application has multiple degrees of freedom that can be adjusted, and the assembly difficulty is reduced; the structural connection method is improved, and the product utilization rate is increased. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0025] Figure 2 Another perspective view of the overall structure of the embodiment of this application.

[0026] Figure 3 A schematic diagram of the universal joint structure in an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the universal joint according to an embodiment of this application.

[0028] Figure 5 This is a schematic diagram of the connection structure between the connecting rod and the roller fixing seat in an embodiment of this application.

[0029] Figure 6 This is an exploded view of the connection structure between the connecting rod and the roller fixing seat in an embodiment of this application.

[0030] Figure 7 This is a cross-sectional schematic diagram of the overall structure of an embodiment of this application.

[0031] Figure 8 This is a schematic diagram of the rotating shaft structure in an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. First cam; 2. Roller; 3. Connecting rod; 4. Universal joint; 5. Push rod; 6. Ball head fixing seat; 7. Washer; 8. Ball head; 9. Cylinder; 11. First rotating shaft; 12. Second rotating shaft; 13. Second cam; 14. Rotating shaft connector; 15. Joint; 18. Roller fixing seat; 19. Limiting hole; 20. Fixing device; 21. Copper part; 22. Screw hole; 23. Air tank; 24. Shaft fixing seat; 26. Third rotating shaft; 25. Joint mounting groove; 27. First movable connection point; 28. Second movable connection point. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0034] Example 1:

[0035] Reference Figure 1 , Figure 2 and Figure 8 This application provides a cam-mounted universal joint mechanism, including a first cam 1, a connecting rod 3, a roller 2, a universal joint 4, and a push rod 5. A base is provided at the bottom of the cam-mounted universal joint mechanism, and a first rotating shaft 11 and a second rotating shaft 12 are provided on the base. Multiple first cams 1 are provided on the first rotating shaft 11, and the first cams 1 are rotatable around the first rotating shaft 11. Multiple connecting rods 3 are provided on the second rotating shaft 12, and one end of each connecting rod 3 is rotatable around the second rotating shaft 12. The roller 2 is connected to the connecting rods 3 through a roller fixing seat 18. Rotation of the first cam 1 causes the roller 2 to move up and down, which in turn drives the connecting rods 3 to rotate, and one end of each connecting rod 3 rotates around the second rotating shaft 12. The positions of the connecting rods 3 and the roller 2 relative to the first cam 1 form a relative cooperation between the first cam 1 and the roller 2, and the rotation of the first cam 1 causes the roller 2 to move up and down.

[0036] Reference Figure 1 , Figure 5 and Figure 6The connecting rod 3 has a rotating groove at one end that rotates around the second rotating shaft 12. A copper part 21 is installed in the rotating groove to reduce wear. The connecting rod 3 has a limiting hole 19, and a roller fixing seat 18 is detachably connected to the limiting hole 19. The roller fixing seat 18 has two screw holes 22 for installing screws to connect the roller fixing seat 18 and the connecting rod 3. The roller fixing seat 18 has a fixing device 20 for fixing the roller 2. In this application, the fixing device 20 is designed as a crescent-shaped gripping groove to grip the roller 2. The roller 2 is mounted on the roller fixing seat 18, and the lowest point of the outer circumference of the roller 2 is lower than the lowest point of the bottom of the connecting rod 3 when it is placed horizontally along its length. The roller 2 is located on the first cam 1, forming a relative fit between the first cam 1 and the roller 2. The first cam 1 rotates, causing the roller 2 to move up and down. Removing the roller 2 only requires removing the roller fixing seat 18; the connecting rod 3 does not need to be removed. In this application, roller 2 is connected to connecting rod 3 via roller fixing seat 18. Roller fixing seat 18 is detachably connected to connecting rod 3, improving the connection method. This eliminates the need to disassemble and reinstall connecting rod 3 when replacing or repairing roller 2, reducing labor costs and increasing the utilization rate of connecting rod 3. The position of roller 2 on connecting rod 3 has a degree of freedom, affecting the lifting amount of the entire cam ejector universal joint mechanism. When the stroke of the first cam 1 remains unchanged, a 1mm change in the fixed connection position between connecting rod 3 and roller 2 can cause a several-fold change in the lifting amount of the entire cam ejector universal joint mechanism.

[0037] The bottom of the connecting rod 3 is provided with a first movable connection point 27 for hinged connection to the cylinder 9. The other end of the connecting rod 3 is provided with a connector mounting groove 25, which connects to the connector 15 via a third rotating shaft 26. The lower end of the connector 15 is provided with a circular groove through which the third rotating shaft 26 passes. Setting a suitable length for the connecting rod 3 allows the connector 15 to swing at a suitable angle, avoiding excessive bending stress. This application utilizes the rotation of the first cam 1 to convert the vertical movement of the push rod 5. The rotation of the first cam 1 generates displacement, which, combined with the length of the connecting rod 3, causes the push rod 5 to move vertically. When the position of the roller 2 is fixed, the ratio of the eccentricity of the first cam 1 to the vertical movement of the push rod 5 is approximately 4 times. In this embodiment, the length of the connecting rod 3 is set to 370 mm, and the swing angle of the connector 15 is 10°.

[0038] In related technologies, the connecting rod in the feeding mechanism uses a sliding connection to allow the joint to rotate at an angle, thereby causing the feeding rod to move up and down. This method requires excessively high precision in the fit between mechanisms, and the joint damage rate is high during debugging, prolonging the debugging time. Furthermore, multiple joint replacements are required over long-term use. This application avoids the sliding connection of the connecting rod in related feeding mechanisms, which causes the joint to rotate and drive the feeding rod. It independently designs a universal joint 4 mechanism that uses a combination of sliding and rotary connections to enable the feeding rod 5 to move up and down. This increases the degree of freedom, reduces the precision required for the fit, shortens the debugging time, avoids multiple replacements of the joint 15, and reduces manual debugging costs.

[0039] Reference Figure 1 , Figure 3 and Figure 4 The top of connector 15 is inserted into the bottom of universal joint 4. Universal joint 4 is a ball cage type universal joint, with a ball head 8 and a ball head retainer 6 inside. The ball head 8 is made of tempered steel and annealed to improve performance. The ball head retainer 6 is made of Cr12, a hard material that improves tensile strength. The ball head 8 is enlarged to a diameter of 32mm, allowing the contact surface between the ball head 8 and the ball head retainer 6 to withstand a tensile force of 1.5 tons, increasing the tensile strength of universal joint 4. This self-made universal joint 4 increases its load-bearing capacity and extends its service life. A removable gasket 7 is provided in the ball head retainer 6 to reduce wear.

[0040] The top of the universal joint 4 is fixedly connected to the bottom of the push rod 5, and the rotation of the connecting rod 3 drives the push rod 5 to move up and down.

[0041] Reference Figure 7 A cylinder 9 is installed under the connecting rod 3 to pull the connecting rod 3 down. One end of the cylinder 9 is hinged to the bottom of the connecting rod 3 through a first movable connection point 27, and the other end is hinged to the base through a second movable connection point 28. The cylinder 9 is supplied with gas through an air tank 23. The cylinder 9 is used to pull the connecting rod 3 down. When the connecting rod 3 is reset, to prevent the bottom rod from not returning in time, the cylinder 9 is used to assist in the return, reducing the probability of processing cycle disruption.

[0042] A second cam 13 is also provided on the second rotating shaft 12. The initial assembly direction of the second cam 13 is opposite to that of the first cam 1. The second cam 13 is larger in volume than the first cam 1 and is also used to pull down the connecting rod 3 to reset it.

[0043] The second shaft 12 is provided with a shaft connector 14 at its end, which is used to connect an external power device to make the shaft rotate.

[0044] A shaft fixing seat 24 was added in the middle of the cam ejector universal joint mechanism. Since the first rotating shaft 11 and the second rotating shaft 12 are relatively long, they are prone to deformation after prolonged use. Adding the shaft fixing seat 24 in the middle can increase the service life of the shaft, and the installation of the shaft fixing seat 24 does not affect the normal installation of the shaft.

[0045] The working principle of this application embodiment is as follows:

[0046] In the cam-driven universal joint mechanism, the first cam 1 rotates, causing the roller 2 to move up and down. The connecting rod 3 is connected to the roller 2. As the roller 2 moves up and down, it drives the connecting rod 3 to rotate. The joint 15 at the end of the connecting rod 3 creates a sliding connection, causing the universal joint 4 to drive the push rod 5 to move up and down.

[0047] In summary, the overall structure of this application has multiple degrees of freedom that can be adjusted, and the assembly difficulty is reduced; the structural connection method is improved, and the product utilization rate is increased. This application provides a cam-mounted universal joint mechanism with multiple degrees of freedom, which improves the connection method, facilitates the disassembly and replacement of roller 2, increases the load-bearing capacity through universal joint 4, improves the utilization rate, and has an improved connection method.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cam-driven universal joint mechanism, comprising a first cam (1), a roller (2), a connecting rod (3), a universal joint (4), and a push rod (5), characterized in that, Multiple first cams (1) rotate around a first rotating shaft (11). A roller (2) is connected to a connecting rod (3) via a roller mounting base (18). The rotation of the first cams (1) causes the roller (2) to move up and down. The up and down movement of the roller (2) drives the connecting rod (3) to rotate. One end of each connecting rod (3) rotates around a second rotating shaft (12). The other end of the connecting rod (3) is slidably connected to a joint (15), causing the universal joint (4) to drive the push rod (5) to move up and down. 15) The top is fixedly connected to the bottom of the universal joint (4), the top of the universal joint (4) is fixedly connected to the bottom of the top rod (5), the connecting rod (3) rotates to drive the top rod (5) to move up and down, the connecting rod (3) is provided with a limit hole (19), the roller fixing seat (18) is detachably connected to the limit hole (19), the roller fixing seat (18) is provided with a fixing device (20) for fixing the roller (2), to remove the roller (2), only the roller fixing seat (18) needs to be removed, without removing the connecting rod (3).

2. The cam ejector universal joint mechanism according to claim 1, characterized in that, The universal joint (4) is configured as a ball cage type universal joint (4), with a ball head (8) and a ball head fixing seat (6) inside. The ball head (8) is made of tempered steel and has undergone annealing treatment.

3. The cam ejector universal joint mechanism according to claim 2, characterized in that, The ball head fixing seat (6) is made of Cr12.

4. The cam ejector universal joint mechanism according to claim 2, characterized in that, The ball head (8) is set to a diameter of 32mm.

5. The cam ejector universal joint mechanism according to claim 2, characterized in that, The ball head fixing seat (6) is provided with a removable gasket (7).

6. The cam-mounted universal joint mechanism according to claim 1, characterized in that, A second cam (13) is also provided on the second rotating shaft (12), and the initial assembly direction of the second cam (13) is opposite to that of the first cam (1).

7. The cam ejector universal joint mechanism according to claim 1, characterized in that, A cylinder (9) is provided under the connecting rod (3) for pulling down the connecting rod (3).

8. The cam ejector universal joint mechanism according to claim 7, characterized in that, One end of the cylinder (9) is hinged to the bottom of the connecting rod (3), and the other end is hinged to the base.

9. The cam ejector universal joint mechanism according to claim 1, characterized in that, The cam ejector universal joint mechanism is also equipped with a shaft fixing seat (24).

10. The cam ejector universal joint mechanism according to claim 1, characterized in that, The connector (15) is connected to the connecting rod (3) via the third rotating shaft (26), and the connector (15) can rotate around the third rotating shaft (26) at a certain angle.

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