Press cam adjusting mechanism and press

Abstract

The utility model discloses a press cam adjusting mechanism and a press, the press cam adjusting mechanism comprises a cam and an expansion sleeve coaxially connected with the cam, the cam is connected with the expansion sleeve through a connecting sleeve, the connecting sleeve is connected to the end face of the cam, and the expansion sleeve is coaxially connected with the cam. The first butt joint face, facing the cam, of the connecting sleeve and the second butt joint face, facing the connecting sleeve, of the cam are provided with teeth respectively, wherein the teeth are matched with each other and are circularly distributed around the axis of the cam. The cam is connected with the expansion sleeve through the connecting sleeve, when the angle of the cam needs to be adjusted, the expansion sleeve does not need to be detached, only the cam and the connecting sleeve need to be unlocked and adjusted, the expansion sleeve, the cam and the driving shaft can be effectively protected, the service life is prolonged, and meanwhile the angle of the cam can be adjusted. And the butt joint surfaces of the cam and the connecting sleeve adopt mutually matched teeth, so that the stability of connection between the cam and the connecting sleeve can be effectively ensured, and the transmission precision is ensured.

Description

Technical Field

[0001] The utility model relates to the field of presses, in particular to a press cam adjusting mechanism and a press. Background Art

[0002] After the product is processed by the press, it is necessary to eject the product from the mold for blanking.

[0003] The invention patent with the authorized publication number CN201070843Y discloses a press that realizes blanking by an ejecting mechanism with an independent power source.

[0004] In a better structure, the ejecting mechanism and the pressing mechanism of the press share a set of power devices, so that they move synchronously. In the current structure, the drive shafts driving the ejecting mechanism and the pressing mechanism need to be connected to the cam through a shrink fit sleeve, and the cam is driven to rotate by the drive shaft to realize the drive of the ejecting mechanism.

[0005] In order to meet different processing requirements, the ejection timing of the lifting ejector rod of the ejecting mechanism needs to be set to be adjustable. Therefore, the corresponding ejection timing adjustment requirements can be met by adjusting the angle of the cam. When specifically adjusting the cam, the shrink fit sleeve needs to be disassembled before the cam can be adjusted. This method is time-consuming and laborious, and is likely to cause damage to the surface of the drive shaft and the inner hole of the cam, affecting the stable use of the equipment. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the above problems existing in the prior art, and provide a press cam adjusting mechanism and a press.

[0007] The purpose of the utility model is achieved by the following technical solutions:

[0008] The press cam adjusting mechanism includes a cam and a shrink fit sleeve coaxially connected to the cam. The cam is connected to the shrink fit sleeve through a connecting sleeve. The connecting sleeve is connected to the end face of the cam, and teeth that cooperate with each other and are circularly distributed around the axis of the cam are respectively arranged at the first docking surface of the connecting sleeve facing the cam and the second docking surface of the cam facing the connecting sleeve.

[0009] Preferably, an operating part located outside the cam is arranged at the second docking surface.

[0010] Preferably, the cam and the connecting sleeve are screwed together. An arc-shaped adjusting hole coaxial with the cam is arranged on one of the cam and the connecting sleeve, and a connecting hole corresponding to the arc-shaped adjusting hole is arranged on the other.

[0011] Preferably, a plurality of arc-shaped adjusting holes are evenly distributed on the connecting sleeve in a circumferential manner, and the connecting holes are screw holes and are evenly arranged on the cam in a circumferential manner.

[0012] Preferably, scale lines corresponding to the teeth on the cam and extending along the axial direction of the connecting sleeve are provided on the circumferential surface of the connecting sleeve.

[0013] A press, comprising the press cam adjusting mechanism described in any one of the above.

[0014] Preferably, the expansion sleeve is coaxially connected to a drive shaft driven by a power device to rotate. The top of the cam abuts against a roller. The roller is arranged on a swing arm. One end of the swing arm is hinged at a first fixed hinge shaft parallel to the drive shaft. The other end of the swing arm is connected to a cam ejecting mechanism through a transmission mechanism.

[0015] Preferably, the transmission mechanism includes a first connecting rod whose upper end is hinged to the other end of the swing arm. The lower end of the first connecting rod is connected to one end of a transmission member. The transmission member is hinged at a second fixed hinge shaft parallel to the drive shaft. The other end of the transmission member is hinged to a second connecting rod. One end of the second connecting rod is hinged to a linear actuator. The other end of the second connecting rod is hinged to the cam ejecting mechanism.

[0016] Preferably, the cam ejecting mechanism includes a rotatable shaft. A first cam and a second cam are arranged on the shaft. The first cam is hinged to the transmission mechanism. The second cam is hinged to a lifting ejector rod.

[0017] Preferably, the drive shaft is connected to a pressing mechanism. During the upward movement of the lifting ejector rod of the cam ejecting mechanism, the slider of the pressing mechanism is in an upward movement process.

[0018] The advantages of the technical solution of the present utility model are mainly reflected in:

[0019] In the present utility model, the cam is connected to the expansion sleeve through the connecting sleeve. When it is necessary to adjust the angle of the cam, it is not necessary to disassemble the expansion sleeve. It is only necessary to unlock the cam and the connecting sleeve and perform the adjustment, which can effectively protect the expansion sleeve, the cam and the drive shaft, extend the service life. At the same time, the docking surfaces of the cam and the connecting sleeve adopt mutually cooperating teeth, which can effectively ensure the stability of the connection between the two to ensure the transmission accuracy.

[0020] An operation part is arranged at the second docking surface of the cam of the present utility model, which is convenient for manual adjustment of the cam. At the same time, scale lines are arranged on the connecting sleeve, which is convenient for more accurate adjustment and is beneficial to improving the adjustment efficiency.

[0021] The ejecting mechanism and the pressing mechanism of the present utility model share a set of power system, which is beneficial to saving the number of power sources, reducing energy consumption, and at the same time enabling the pressing mechanism and the ejecting mechanism to have better fit, which is beneficial to improving the working rhythm. Description of the Drawings

[0022] Figure 1 is a perspective view of the press cam adjustment mechanism of the present utility model;

[0023] Figure 2 is a partial exploded perspective view of the press cam adjustment mechanism of the present utility model;

[0024] Figure 3 is a partial perspective view of the press of the present utility model;

[0025] Figure 4 is a side view of the press of the present utility model. Detailed implementation manners

[0026] The objectives, advantages and characteristics of the present utility model will be illustrated and explained by the following non - restrictive description of preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present utility model, and any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present utility model.

[0027] In the description of the solution, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] The press cam adjustment mechanism 100 disclosed by the present utility model will be described below with reference to the drawings. As shown in the attached Figure 1 and attached Figure 2 , it includes a cam 110 and a shrink - fit bushing 120 coaxially connected to the cam 110. The cam 110 is connected to the shrink - fit bushing 120 through a connecting sleeve 130. The connecting sleeve 130 is connected to the end face of the cam 110, and teeth 140 that cooperate with each other and are circularly distributed around the axis of the cam 110 are respectively provided at the first mating surface of the connecting sleeve 130 facing the cam 110 and the second mating surface of the cam 110 facing the connecting sleeve 130.

[0029] The shrink - fit bushing 120 is coaxially connected in the inner hole of the connecting sleeve 130. At the same time, the inner hole of the connecting sleeve 130 is a counterbore, and the connecting sleeve 130 is coaxially connected to the cam. Of course, this is not necessary.

[0030] The connection mode between the connecting sleeve 130 and the cam 110 can be selected as needed. For example, the connecting sleeve 130 and the cam 110 can be connected by snap connection.

[0031] Preferably, the connecting sleeve 130 is screwed to the cam 110. And, an arc-shaped adjustment hole 131 coaxial with the cam 110 is provided on one of the cam 110 and the connecting sleeve 130, and a connecting hole 111 corresponding to the arc-shaped adjustment hole 131 is provided on the other. Both the arc-shaped adjustment hole 131 and the connecting hole 111 extend along the axial direction of the cam 110. When it is necessary to connect the cam 110 and the connecting sleeve 130, the bolt is passed through the connecting hole 111 and the corresponding arc-shaped adjustment hole 131 and then locked by a lock nut to realize the fastening of the connecting sleeve 130 and the cam 110. When it is necessary to adjust the cam 110, loosen the nut, so that the teeth meshing the cam 110 and the connecting sleeve 130 can be disengaged, and then rotate the cam 110 to a proper position and lock the nut again.

[0032] The arc-shaped adjustment hole 131 can be a hole with a relatively long arc length, and the number of the connecting holes 111 can be at least one. In a more preferable manner, as shown in the appendix Figure 2 The arc-shaped adjustment hole 131 is multiple and evenly distributed on the circumference of the connecting sleeve 130. Correspondingly, the connecting hole 111 is a threaded hole and is evenly arranged on the circumference of the cam 110. The arc-shaped adjustment hole 131 is composed of 4 arc-shaped holes with relatively short arc lengths, and the connecting hole 111 is 4 and corresponds to each arc-shaped adjustment hole 131. At this time, only the bolt 150 needs to be directly passed through the arc-shaped adjustment hole 131 and screwed into the threaded hole, and the operation is more convenient.

[0033] And, in order to facilitate the rotation of the cam 110, an operation part 150 located outside the cam 110 is provided at the second docking surface. The specific structure of the operation part 150 can be designed as needed, such as a rod-shaped handle, which is not limited here.

[0034] Furthermore, in order to facilitate the determination of the adjustment amount, scale lines 132 corresponding to the teeth on the cam 110 and extending along the axial direction of the connecting sleeve 130 are provided on the circumferential surface of the connecting sleeve 130. The scale lines 132 correspond to each tooth on the cam 110 one by one and are in a directly opposite position.

[0035] Embodiment 2

[0036] This embodiment discloses a press, as shown in the appendix Figure 3As shown, it includes the press cam adjustment mechanism 100 as described above. The press cam adjustment mechanism 100 is used to adjust the movement timing of the lifting ejector rod 210 of the cam ejector mechanism 200 of the press so that its movement can coincide with the movement of the slider 310 of the pressing mechanism 300 of the press.

[0037] As shown in the appendix Figure 3 As shown, the expansion sleeve 120 is coaxially sleeved on one end of the drive shaft 500 driven to rotate by the power device 400. The specific structure of the power device 400 driving the drive shaft 500 to rotate is a known technology and will not be elaborated here.

[0038] As shown in the appendix Figure 3 As shown, the top of the cam 110 abuts against the circumferential surface of a roller 600. The axis of the roller 600 is parallel to the drive shaft, and it is arranged on a swing arm 700 and protrudes below the bottom of the swing arm 700. The roller 600 is located in the middle area in the length direction of the swing arm 700. One end of the swing arm 700 away from the cam ejector mechanism is hinged at the first fixed hinge shaft 710. The first fixed hinge shaft 710 is parallel to the drive shaft. The other end of the swing arm 700 is connected to the cam ejector mechanism 200 through a transmission mechanism 800. During operation, the drive shaft 500 rotates to drive the cam 110 to rotate, thereby driving the roller 600 to move up and down. Furthermore, the swing arm 700 can rotate around the first fixed hinge shaft 710 and drive the transmission mechanism 800 to drive the lifting ejector rod 210 of the cam ejector mechanism 200 to move up and down for ejecting materials.

[0039] As shown in the appendix Figure 3 As shown, the transmission mechanism 800 includes a first connecting rod 810 whose upper end is hinged to the other end of the swing arm 700. The lower end of the first connecting rod 810 extends below the pressing mechanism 300 and is connected to one end of a transmission member 820. The transmission member 820 is also hinged at the second fixed hinge shaft 830 parallel to the drive shaft. The other end of the transmission member 820 is hinged to a second connecting rod 840. The rotating member is a triangular member. The second fixed hinge shaft 830, the first hinge point 850 of the transmission member 820 and the first connecting rod 810, and the second hinge point 860 of the second connecting rod 840 and the transmission member 820 are distributed in a triangular shape, and the second fixed hinge shaft 830 is closer to the cam ejector mechanism than the first hinge point 850 and the second hinge point 860. The second connecting rod 840 is generally in a horizontal state. One end of it away from the cam ejector mechanism is hinged to a linear actuator 870. The linear actuator 870 can be a feasible device such as a cylinder, a hydraulic cylinder, an electric cylinder, etc. The other end of the linear actuator 870 is hinged on the fixed seat 880. The other end of the second connecting rod 840 is hinged to the cam ejector mechanism 200.

[0040] The cam ejecting mechanism 200 includes a rotatable shaft 220. The shaft 220 is parallel to the drive shaft 500. A first cam 230 and a second cam 240 are arranged on the shaft 220. One end of the first cam 230 near the shaft 220 is hinged to the other end of the second connecting rod 840 of the transmission mechanism 800. The protruding parts of the first cam 230 and the second cam 240 face different directions. The number of the second cams 240 is multiple. Each second cam 240 is hinged to one of the lifting ejector rods 210. The lifting ejector rods 210 extend in the vertical direction and are movably arranged up and down in the guide holes 910 on the workbench 900. The workbench 900 is used to install the mold, and its installation position is fixed. Further, the lifting ejector rods are arranged in the guide sleeves in the guide holes.

[0041] During operation, the second connecting rod 840 drives the shaft 220 to rotate reciprocally, so as to drive the lifting ejector rods 210 to move up and down through a set of second cams 240.

[0042] As shown in the attached Figure 3 and the attached Figure 4 As shown, the drive shaft 500 is connected to the pressing mechanism 300. The pressing mechanism 300 includes a first rocker arm 320. One end of the first rocker arm 320 is connected to the drive disk 330 and they can rotate relative to each other. The drive disk 330 is eccentrically connected to the drive shaft 500. The other end of the first rocker arm 320 is hinged to one end of a triangular frame 340. The second end of the triangular frame is hinged at a third fixed hinge shaft 350 parallel to the drive shaft. The third end of the triangular frame is hinged to one end of a second rocker arm 360. The other end of the second rocker arm 360 is hinged to the top of the slider 310. The slider 310 is slidably arranged on the guide rail 370.

[0043] During operation, the drive shaft 500 rotates the drive disk 330, thereby driving the first rocker arm 320 to swing. The first rocker arm 320 drives the triangular frame to rotate around the third fixed hinge shaft 350, so as to drive the second rocker arm 360 to drive the slider 310 to move up and down to realize processing.

[0044] By adjusting the relative positions of the cam 110 and the connecting sleeve 130, the upward ejection process of the lifting ejector rods 210 of the cam ejecting mechanism 200 is during the upward movement of the slider 310 of the pressing mechanism 300. That is, during the process that the lifting ejector rods 210 move upward from the lowest position to the highest position, the slider 310 maintains an upward movement state, so as to avoid interference with the movement of the slider 310 when ejecting the workpiece.

[0045] There are still various implementation manners for the present utility model. All technical solutions formed by adopting equivalent transformation or equivalent substitution fall within the protection scope of the present utility model.

Claims

1. Press cam adjustment mechanism, including a cam and a shrink disc coaxially connected to the cam, characterized in that: The cam is connected to the expansion sleeve through a connecting sleeve. The connecting sleeve is connected to the end face of the cam, and teeth that cooperate with each other and are circularly distributed around the axis of the cam are respectively provided at the first docking surface of the connecting sleeve facing the cam and the second docking surface of the cam facing the connecting sleeve. The cam and the connecting sleeve are screwed together. An arc-shaped adjusting hole coaxial with the cam is provided on one of the cam and the connecting sleeve, and a connecting hole corresponding to the arc-shaped adjusting hole is provided on the other. There are multiple arc-shaped adjusting holes evenly distributed in a circumferential manner on the connecting sleeve, and the connecting holes are threaded holes evenly arranged on the cam in a circumferential manner.

2. The press cam adjustment mechanism according to claim 1, characterized in that: An operating part located outside the cam is provided at the second docking surface.

3. The press cam adjustment mechanism according to any one of claims 1-2, characterized in that: Scale lines corresponding to the teeth on the cam and extending along the axial direction of the connecting sleeve are provided on the circumferential surface of the connecting sleeve.

4. Press, characterized in that: It includes a press cam adjusting mechanism according to any one of claims 1-3.

5. The press according to claim 4, characterized in that: The expansion sleeve is coaxially connected to a drive shaft driven to rotate by a power device. The top of the cam abuts against a roller, and the roller is arranged on a swing arm. One end of the swing arm is hinged at a first fixed hinge shaft parallel to the drive shaft, and the other end of the swing arm is connected to a cam ejecting mechanism through a transmission mechanism.

6. The press according to claim 5, characterized in that: The transmission mechanism includes a first connecting rod whose upper end is hinged to the other end of the swing arm. The lower end of the first connecting rod is connected to one end of a transmission member. The transmission member is hinged at a second fixed hinge shaft parallel to the drive shaft. The other end of the transmission member is hinged to a second connecting rod. One end of the second connecting rod is hinged to a linear actuator, and the other end of the second connecting rod is hinged to the cam ejecting mechanism.

7. The press according to claim 5, characterized in that: The cam ejecting mechanism includes a rotatable shaft. A first cam and a second cam are arranged on the shaft. The first cam is hinged to the transmission mechanism, and the second cam is hinged to a lifting ejecting rod.

8. The press according to claim 5, characterized in that: The drive shaft is connected to a pressing mechanism. During the upward movement of the lifting ejecting rod of the cam ejecting mechanism, the slider of the pressing mechanism is in an upward movement process.

Images