Self-locking hold-down mechanism

Abstract

The utility model discloses a kind of self-locking pressure mechanisms in the technical field of pressure mechanism, including support and pin, the top of the support is provided with B oil port, one end of the support is equipped with end cover one, the left side wall of end cover one is provided with A oil port, the inner chamber of the support is provided with oil cylinder barrel, one end of the oil cylinder barrel is equipped with wedge block;The other end of the support is movably provided with pressing plate by pin, one end of the pressing plate is connected with wedge block by first spring, the other end of the pressing plate is connected with pressing block;The other end of the support is equipped with end cover two matched with pressing plate, the pin is installed on end cover two and support;The top of the pressing plate is movably connected with ball head by second spring, the top of the ball head is in contact with the inner chamber top of oil cylinder barrel. The present application can realize self-locking while conveniently pressing workpiece, avoid loosening, thereby improve the pressing limiting function of workpiece, reduce the influence on workpiece processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of clamping mechanism technology, specifically to a self-locking clamping mechanism. Background Technology

[0002] Machining, short for mechanical processing, refers to the processing technology of removing material through precise mechanical machining. The main task of machining is to use machine tools to perform refined processing of raw materials.

[0003] Currently, workpieces are typically clamped and limited during processing to assist in the process. However, commonly used clamping devices often fail to achieve proper self-locking during machining, easily loosening and causing clamping failure, thus affecting machining efficiency. Therefore, we propose a self-locking clamping mechanism. Utility Model Content

[0004] The purpose of this invention is to overcome the aforementioned problems in the prior art and provide a self-locking clamping mechanism that can clamp the workpiece while also achieving self-locking to prevent loosening, thereby improving the clamping and limiting function of the workpiece and reducing the impact on the workpiece processing efficiency.

[0005] To solve the above technical problems, this utility model provides a self-locking clamping mechanism, including a support and a pin. The top of the support is provided with an oil port B, and an end cap is installed at one end of the support. An oil port A is provided on the left side wall of the end cap. The inner cavity of the support is provided with a cylinder, and a wedge is installed at one end of the cylinder.

[0006] The other end of the support is movably provided with a pressure plate by a pin. One end of the pressure plate is connected to the wedge block by a first spring, and the other end of the pressure plate is connected to a pressure block.

[0007] The other end of the support is fitted with an end cap two that mates with the pressure plate, and the pin is installed on the end cap two and the support;

[0008] The top of the pressure plate is movably connected to a ball head via a second spring, and the top of the ball head abuts against the top of the inner cavity of the cylinder.

[0009] Preferably, the B oil port is connected to the top right side of the first cavity of the support, and the right end of the second cavity of the support and the second end cover are both provided with mounting holes that cooperate with the pin.

[0010] Based on the above technical features, it is convenient to install and fix the pin, support and end cap.

[0011] Preferably, the wedge includes an intermediate block located on the left side of the inner cavity of the cylinder barrel, and an end cap three is provided on the left side of the intermediate block, the end cap three being fixedly installed on the left side of the cylinder barrel by screws.

[0012] Based on the above technical features, it is convenient to install and fix the wedge at one end of the cylinder barrel.

[0013] Preferably, a first spring hole is provided in the middle of the right side wall of the intermediate block, one end of the first spring is fixedly connected in the first spring hole, and a second spring hole is provided in the middle of one end of the pressure plate, the other end of the first spring is fixedly connected in the second spring hole.

[0014] Based on the above technical features, it is convenient to use the first spring to elastically connect the pressure plate and the wedge.

[0015] Preferably, a wedge is provided at the bottom right side of the intermediate block, a guide slope is provided on the wedge, and an arc-shaped protrusion is provided at the bottom of one end of the pressure plate to cooperate with the guide slope.

[0016] Based on the above technical features, the pressure plate can slide along the guide slope via the arc-shaped protrusion.

[0017] Preferably, a sealing ring groove is provided at the left end of the outer wall of the cylinder barrel; a pull block is provided at both the front and rear ends of the right side of the inner cavity of the cylinder barrel, and an arc block that cooperates with the pull block is provided at the left end of both the front and rear sides of the pressure plate.

[0018] Based on the above technical features, when the cylinder moves back towards the end cover, the pull block contacts and squeezes the arc block, thereby causing the pressure plate to retract and reset.

[0019] Preferably, the top of the pressure plate has a third spring hole, and the second spring is located in the third spring hole; the bottom of the ball head presses on the second spring.

[0020] Based on the above technical features, the ball head can easily adjust the tightness of the pressure plate by elastically extending and retracting through the second spring in the third spring hole, so that the arc-shaped protrusion of the pressure plate fits tightly against the guide slope.

[0021] Preferably, the front sidewall of the pressure plate is provided with an oblique groove that cooperates with the pin.

[0022] Based on the above technical features, it is easy for one end of the pressure plate connected to the pressure block to tilt up or press tightly during extension and retraction.

[0023] In summary, this utility model has at least one of the following beneficial effects:

[0024] Oil enters through port A and exits through port B. The hydraulic pressure propels the cylinder forward, which in turn pushes the pressure plate forward via the first spring, causing the pressure plate to rotate around the pin. The non-clamping end of the pressure plate gradually rises, while the clamping end moves downward. Finally, under hydraulic pressure, the first spring is compressed, and the second spring is compressed by the ball head, causing the top of the ball head to press against the top of the cylinder's inner cavity, achieving self-locking. The downward movement of the clamping end of the pressure plate causes the pressure block to clamp the workpiece, thus facilitating both workpiece clamping and self-locking, preventing loosening, improving the workpiece clamping and limiting function, and reducing the impact on workpiece processing efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention in use.

[0026] Figure 2 For the present utility model Figure 1 A schematic diagram of the support structure in the diagram;

[0027] Figure 3 For the present utility model Figure 2 Top view;

[0028] Figure 4 For the present utility model Figure 1 A schematic diagram of the structure of the pressing block in the middle;

[0029] Figure 5 For the present utility model Figure 4 Top view;

[0030] Figure 6 For the present utility model Figure 1 A schematic diagram of the wedge structure in the diagram;

[0031] Figure 7 For the present utility model Figure 1 A schematic diagram of the structure of the hydraulic cylinder barrel in the diagram;

[0032] Figure 8 For the present utility model Figure 7 The left view;

[0033] Figure 9 For the present utility model Figure 1 A schematic diagram of the structure of end cap 2 in the middle;

[0034] Figure 10 For the present utility model Figure 9 The left view;

[0035] Figure 11 For the present utility model Figure 1 A schematic diagram of the structure of the pressure plate in the middle;

[0036] Figure 12 For the present utility model Figure 11 Top view;

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1-Support, 101-Oil port B, 102-Mounting hole, 103-First cavity, 104-Second cavity, 2-Pressure block, 3-End cap one, 301-Oil port A, 4-Wedge, 401-End cap three, 402-Intermediate block, 403-First spring hole, 404-Guide inclined surface, 5-Cylinder barrel, 501-Sealing ring groove, 502-Pull block, 6-Ball head, 7-Pin, 8-End cap two, 9-Pressure plate, 901-Third spring hole, 902-Second spring hole, 903-Slanted slide groove, 904-Arc block, 905-Arc-shaped protrusion. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-12 The present invention will be described in further detail below.

[0040] One embodiment of this utility model is shown below: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A self-locking clamping mechanism includes a support 1 and a pin 7. The top of the support 1 is provided with an oil port B 101, which is connected to the top right side of the first cavity 103 of the support 1. An end cap 3 is installed at one end of the support 1, and an oil port A 301 is provided on the left side wall of the end cap 3.

[0041] The inner cavity of the support 1 is provided with a hydraulic cylinder 5, and a wedge 4 is installed at one end of the hydraulic cylinder 5;

[0042] The other end of the support 1 is movably provided with a pressure plate 9 via a pin 7. One end of the pressure plate 9 is connected to the wedge block 4 via a first spring, and the other end of the pressure plate 9 is connected to a pressure block 2.

[0043] See Figure 1 , Figure 2 , Figure 8 and Figure 9 The other end of the support 1 is equipped with an end cap 2 8 that mates with the pressure plate 9. The pin 7 is installed on the end cap 2 8 and the support 1. The right end of the second cavity 104 of the support 1 and the end cap 2 8 are both provided with mounting holes 102 that mate with the pin 7, so as to facilitate the installation and fixation of the pin 7 with the support 1 and the end cap 2 8.

[0044] See Figure 1 and Figure 6The wedge 4 includes an intermediate block 402, which is located on the left side of the inner cavity of the cylinder 5. An end cap 401 is provided on the left side of the intermediate block 402. The end cap 401 is fixedly installed on the left side of the cylinder 5 by screws, which facilitates the installation and fixation of the wedge 4 at one end of the cylinder 5.

[0045] A first spring hole 403 is provided in the middle of the right side wall of the middle block 402. One end of the first spring is fixedly connected in the first spring hole 403. A second spring hole 902 is provided in the middle of one end of the pressure plate 9. The other end of the first spring is fixedly connected in the second spring hole 902, so as to facilitate the elastic connection between the pressure plate 9 and the wedge 4 through the first spring.

[0046] A wedge is provided at the bottom right side of the middle block 402, and a guide slope 404 is provided on the wedge. An arc-shaped protrusion 905 that cooperates with the guide slope 404 is provided at the bottom of one end of the pressure plate 9, so that the pressure plate 9 can slide along the guide slope 404 through the arc-shaped protrusion 905.

[0047] The top of the pressure plate 9 is movably connected to the ball head 6 via a second spring, and the top of the ball head 6 abuts against the top of the inner cavity of the cylinder 5.

[0048] See Figure 1 and Figure 11 The top of the pressure plate 9 is provided with a third spring hole 901, and the second spring is located in the third spring hole 901; the bottom of the ball head 6 is pressed on the second spring, so that the ball head 6 can elastically extend and retract in the third spring hole 901 through the second spring to adjust the tightness of the pressure plate 9, so that when the arc-shaped protrusion 905 of the pressure plate 9 is pressed on the guide slope 404, it fits tightly.

[0049] The front side wall of the pressure plate 9 is provided with a slanted groove 903 that matches the pin 7, so that the end of the pressure plate 9 connected to the pressure block 2 can be raised or pressed during extension and retraction.

[0050] See Figure 1 , Figure 7 , Figure 8 , Figure 11 and Figure 12 A sealing ring groove 501 is provided on the left end of the outer wall of the cylinder 5. An O-ring is installed on the outer wall of the cylinder 5 through the sealing ring groove 501, thereby improving the sealing performance between the cylinder 5 and the first cavity 103 of the support 1. Pull blocks 502 are provided at both the front and rear ends of the right side of the inner cavity of the cylinder 5. Arc blocks 904 that cooperate with the pull blocks 502 are provided at the left ends of both the front and rear sides of the pressure plate 9. When the cylinder 5 moves back towards the end cover 3, the pull blocks 502 and the arc blocks 904 come into contact and squeeze, thereby causing the pressure plate 9 to retract and reset.

[0051] Working principle:

[0052] Oil enters through port A 301 and exits through port B 101. In the first cavity 103, hydraulic pressure propels the cylinder 5 forward. The cylinder 5, via a first spring, pushes the pressure plate 9 forward, causing the pin 7 to move to the left relative to the pressure plate 9 in the inclined slide groove 903. After reaching the leftmost end of the inclined slide groove 903, the cylinder 5 continues to advance under hydraulic pressure. The bottom of the non-pressing end of the pressure plate 9 slides onto the guide slope 404 of the wedge head of the wedge block 4 via the arc-shaped protrusion 905 and slides along the guide slope 404, causing the pressure plate 7 to move forward. Plate 9 rotates around pin 7, the non-clamping end of pressure plate 9 gradually rises, and the clamping end of pressure plate 9 moves down. Finally, under the push of hydraulic pressure, the first spring is squeezed and compressed, and the second spring is squeezed and compressed by ball head 6, so that the top of ball head 6 is pressed against the top of the inner cavity of cylinder 5 to achieve self-locking. The downward movement of the clamping end of pressure plate 9 drives the pressure block 2 to clamp the workpiece, so as to facilitate clamping the workpiece while achieving self-locking, avoiding loosening, thereby improving the clamping and limiting function of the workpiece and reducing the impact on the workpiece processing efficiency.

[0053] Oil enters through port B 101 and exits through port A 301. In the first cavity 103, the oil pressure pushes the cylinder 5 backward to perform the above-mentioned reverse action for reset, causing the pressure plate 9 to retract and the pressing end of the pressure plate 9 to move upward, causing the pressure block 2 to tilt up, without performing the workpiece pressing and limiting work.

[0054] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A self-locking clamping mechanism, comprising a support (1) and a pin (7), characterized in that: The top of the support (1) is provided with oil port B (101), and one end of the support (1) is provided with end cap 1 (3). The left side wall of the end cap 1 (3) is provided with oil port A (301). The inner cavity of the support (1) is provided with a cylinder barrel (5), and a wedge (4) is installed at one end of the cylinder barrel (5). The other end of the support (1) is movably provided with a pressure plate (9) via a pin (7). One end of the pressure plate (9) is connected to the wedge (4) via a first spring, and the other end of the pressure plate (9) is connected to a pressure block (2). The other end of the support (1) is fitted with an end cap (8) that cooperates with the pressure plate (9), and the pin (7) is installed on the end cap (8) and the support (1); The top of the pressure plate (9) is movably connected to a ball head (6) via a second spring, and the top of the ball head (6) abuts against the top of the inner cavity of the cylinder barrel (5).

2. The self-locking clamping mechanism according to claim 1, characterized in that: The B oil port (101) is connected to the top right side of the first cavity (103) of the support (1), and the right end of the second cavity (104) of the support (1) and the end cap (8) are provided with mounting holes (102) that cooperate with the pin (7).

3. The self-locking clamping mechanism according to claim 1, characterized in that: The wedge (4) includes an intermediate block (402), which is located on the left side of the inner cavity of the cylinder barrel (5). An end cap (401) is provided on the left side of the intermediate block (402), and the end cap (401) is fixedly installed on the left side of the cylinder barrel (5) by screws.

4. The self-locking clamping mechanism according to claim 3, characterized in that: The middle right wall of the intermediate block (402) has a first spring hole (403) in the middle, one end of the first spring is fixedly connected in the first spring hole (403), and the middle of one end of the pressure plate (9) has a second spring hole (902), the other end of the first spring is fixedly connected in the second spring hole (902).

5. A self-locking clamping mechanism according to claim 3, characterized in that: The bottom right side of the intermediate block (402) is provided with a wedge, and the wedge is provided with a guide slope (404). One end of the pressure plate (9) is provided with an arc-shaped protrusion (905) that cooperates with the guide slope (404).

6. The self-locking clamping mechanism according to claim 1, characterized in that: A sealing ring groove (501) is provided on the left end of the outer wall of the cylinder (5); a pull block (502) is provided on both the front and rear ends of the right side of the inner cavity of the cylinder (5), and an arc block (904) that cooperates with the pull block (502) is provided on the left ends of both the front and rear sides of the pressure plate (9).

7. The self-locking clamping mechanism according to claim 1, characterized in that: The top of the pressure plate (9) is provided with a third spring hole (901), and the second spring is located in the third spring hole (901); the bottom of the ball head (6) is pressed on the second spring.

8. The self-locking clamping mechanism according to claim 1, characterized in that: The front side wall of the pressure plate (9) is provided with an oblique groove (903) that cooperates with the pin (7).

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