Clamping device for bi-directionally clamping workpiece

Abstract

The utility model provides a bi-directional workpiece clamping device which comprises a base, a driving part, a sliding block part and a clamping part, the base serves as an installation foundation of the driving part, the sliding block part and the clamping part, and the driving part drives the clamping part to move forwards or backwards through the sliding block part; the clamping part comprises a first side plate and a second side plate which are intersected and connected; when the clamping part moves forwards, the first side plate is in contact with one side of a workpiece, and the second side plate is in contact with the other side of the workpiece; and when the clamping part moves backwards, the first side plate and / or the second side plate are / is separated from the workpiece. The clamping part comprises the first side plate and the second side plate, the first side plate and the second side plate clamp the workpiece from different directions, the problem that most existing clamps have one-way clamping force is solved, then the problem that the workpiece is prone to loosening and upwarping in the using process is reduced, and the machining precision and efficiency are improved advantageously.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically to a bidirectional workpiece clamping device. Background Technology

[0002] In machining processes, the stability and clamping efficiency of the fixture are crucial to the machining quality.

[0003] Chinese patent CN211219016U discloses a fixture for machining nuts for connecting rod bolts, comprising a base, a clamping mechanism, a first clamping plate, a second clamping plate, a bearing, a lead screw, an abutment mechanism, a rotating seat, a stop block, a rotating shaft, and a rack. The advantages of this invention are: by rotating the lead screw at one end of the base, the lead screw drives the second clamping plate to slide on the top of the base, thereby clamping and disassembling the nut. The first and second clamping plates have symmetrically distributed triangular grooves on opposite sides, which facilitates abutment and clamping of the nut's edges and corners, ensuring a firm grip and preventing loosening. The forward and reverse rotation of the lead screw increases the efficiency of nut clamping and disassembly. Simultaneously, racks are installed on both sides of the second clamping plate. By rotating the stop blocks on both sides of the top of the base, the stop blocks abut against the racks in different directions, facilitating unidirectional abutment and preventing the second clamping plate from loosening. Furthermore, it prevents the lead screw from being under constant stress, thus improving the lead screw's service life.

[0004] Most existing clamps are unidirectional clamping. For example, conventional pressure plates only provide downward pressure, while side clamps only provide lateral thrust. These clamps can cause workpieces to loosen or tilt upwards during use, affecting machining accuracy and efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a bidirectional workpiece clamping device.

[0006] According to the present invention, a bidirectional workpiece clamping device includes a base, a driving part, a slider part, and a clamping part. The base serves as the mounting base for the driving part, the slider part, and the clamping part. The driving part drives the clamping part to move forward or backward through the slider part.

[0007] The clamping part includes two intersecting and connected first side plates and second side plates;

[0008] When the clamping part moves forward, the first side plate contacts one side of the workpiece, and the second side plate contacts the other side of the workpiece;

[0009] When the clamping part moves backward, the first side plate and / or the second side plate separate from the workpiece.

[0010] Preferably, the bottom of the base is provided with a countersunk hole, and the countersunk hole contains a strong magnet.

[0011] Preferably, the slider part includes a first slider and a second slider, the first slider is detachably fixed on the base, the second slider is rotatably connected to the clamping part, and the first slider and the second slider are slidably connected by a dovetail groove.

[0012] Preferably, the sliding surfaces of the first slider and the second slider include inclined surfaces.

[0013] Preferably, the second slider is connected to the clamping part via a mandrel, and a shaft hole for accommodating the mandrel is provided at the intersection of the first side plate and the second side plate, and the second slider is fixed on the mandrel.

[0014] Preferably, a guide groove is provided on the side of the second slider near the base, and guide pins are fixed on the inner sides of the base respectively;

[0015] The guide pin is slidably connected to the guide groove.

[0016] Preferably, the drive unit includes a compression spring disposed between the first slider and the base.

[0017] Preferably, the compression spring comprises two springs, which are distributed opposite to each other on both sides of the base.

[0018] Preferably, pads are provided on the opposite surfaces of the first side plate and the second side plate.

[0019] Preferably, a handle is provided at the end of the base away from the slider.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This utility model, by including a first side plate and a second side plate in the clamping part, clamps the workpiece from different directions, which solves the problem that most existing clamps have a unidirectional clamping force, thereby reducing the problem of workpieces being easy to loosen and tilt upwards during use, and is conducive to improving processing accuracy and efficiency;

[0022] 2. This utility model uses two flexible fixing devices, namely magnetic attraction and bolts, to fix the clamps. The magnetic attraction method solves the problem that existing clamps are mostly fixed to the machine table with bolts, which is cumbersome to disassemble and is time-consuming and labor-intensive. The two fixing methods can be flexibly selected, which improves the overall processing smoothness and increases the application scenarios of the clamps.

[0023] 3. This utility model sets up a first slider and a second slider. By tightening or loosening the bolts, the elastic force generated by the compression spring controls the up and down movement of the first slider, thereby causing the dovetail groove slide to squeeze the slider forward or backward, achieving the clamping or loosening effect of the clamping part. It is convenient and efficient to assemble and disassemble.

[0024] 4. This utility model sets the sliding surfaces of the first slider and the second slider as inclined planes. The inclined planes convert the downward or upward movement of the first slider into the forward or backward movement of the second slider. In addition, by adjusting the angle of the inclined planes, the force of the rotating bolt can be adjusted. A small change in the vertical direction can bring about a large movement in the horizontal direction. It can also provide better rigidity and guidance, reduce gaps, and improve the positioning accuracy of the first slider and the second slider. Attached Figure Description

[0025] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram illustrating the structure of the clamping device when clamping a workpiece, which is the main feature of this utility model.

[0027] Figure 2 This is a schematic diagram illustrating the structure of the clamping device when it is not clamping a workpiece.

[0028] Figure 3 This is a schematic diagram illustrating the structure of the clamping device when it is not clamping a workpiece.

[0029] Figure 4 This is an exploded view showing the clamping device, which is the main feature of this utility model.

[0030] In the picture:

[0031] Base 1, First slider 2, Second slider 3

[0032] Clamping part 4 First side plate 401 Second side plate 402

[0033] 5. Core rod; 6. Washer block; 7. Headless hex socket screw.

[0034] Strong magnet 8 M12 bolt 9 M8 bolt 10

[0035] Compression spring 11, guide post 12, guide pin 13

[0036] 14 Rod handle, 15 M6 countersunk screw, 16 Workpiece Detailed Implementation

[0037] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0038] like Figures 1 to 4 As shown, the present invention provides a bidirectional workpiece clamping device, including a base 1, a driving part, a slider part, and a clamping part 4. The base 1 serves as the mounting base for the driving part, the slider part, and the clamping part 4. The driving part drives the clamping part 4 to move forward or backward through the slider part. The clamping part 4 includes two intersecting and connected first side plates 401 and second side plates 402. When the clamping part 4 moves forward, the first side plate 401 contacts one side of the workpiece 16, and the second side plate 402 contacts the other side of the workpiece 16. When the clamping part 4 moves backward, the first side plate 401 and / or the second side plate 402 separate from the workpiece 16.

[0039] The driving unit of this invention drives the slider unit to move. The movement of the slider unit causes the clamping unit 4 to move forward or backward. When the clamping unit 4 moves forward, the first side plate 401 and the second side plate 402 respectively contact different surfaces of the workpiece 16, pressing the workpiece 16 from two directions, thus achieving bidirectional clamping of the workpiece 16. When the clamping unit 4 moves backward, both the first side plate 401 and the second side plate 402 separate from the workpiece 16, or the first side plate 401 separates from the workpiece 16 while the second side plate 402 remains in contact with the workpiece 16, or the first side plate 401 remains in contact with the workpiece 16 while the second side plate 402 separates from the workpiece 16, thus achieving the release of the workpiece 16 and solving the problem that most existing fixtures have only unidirectional clamping force.

[0040] One feasible implementation is as follows: the first side plate 401 contacts the upper part of the workpiece 16, applying a downward pressure to the upper part of the workpiece 16; the second side plate 402 contacts the right side of the workpiece 16, applying a leftward pressure to the right side of the workpiece 16. The first side plate 401 and the second side plate 402 apply pressure to the workpiece 16 from two directions, thereby clamping the workpiece 16 from two directions. Pads 6 are provided on the opposing surfaces of the first side plate 401 and the second side plate 402. The workpiece 16 contacts the pads 6 on the first side plate 401 and the second side plate 402. The thickness, area, and shape of the pads 6 can be adjusted to accommodate workpieces 16 of different sizes or specifications. The pads 6 are preferably made of rubber, silicone, anti-slip plastic (such as nylon with glass fiber), or a material with a rough surface (such as textured resin), whose surface friction coefficient is higher than that of the clamping part 4, increasing the friction between the pads and the workpiece 16 and preventing the workpiece 16 from sliding.

[0041] Specifically, the clamping device can be fixed to the machine base by M12 bolts 9 on the base 1. The bottom of the base 1 is provided with a countersunk hole, which houses a strong magnet 8. The strong magnet 8 is installed on the bottom of the base 1 by M6 countersunk screws 15. The clamping device can also be fixed to the machine base by the magnetism of the strong magnet 8 on the base 1. The clamping device has two flexible fixing methods: magnetic attraction and bolts. The magnetic attraction method solves the problem that the existing clamps are cumbersome and time-consuming to disassemble and assemble by bolts. A handle 14 is provided at the end of the base 1 away from the slider. One feasible implementation is to fix the handle 14 at the tail of the base 1. The handle 14 is preferably an M12 bolt 9, which facilitates the gripping force during disassembly or installation.

[0042] Specifically, the slider part includes a first slider 2 and a second slider 3, which are connected by a dovetail groove. The first slider 2 is detachably fixed to the base 1, and the second slider 3 is rotatably connected to the clamping part 4. The driving part includes a compression spring 11, which is disposed between the first slider 2 and the base 1. Preferably, there are two compression springs 11, which are distributed opposite to each other on both sides of the base 1.

[0043] One feasible implementation is as follows: The first slider 2 is fixed to the base 1 by an M8 bolt 10. The first slider 2 and the second slider 3 are fitted together by a dovetail groove. A compression spring 11 is provided between the first slider 2 and the countersunk head of the base 1. A guide post 12 is provided on the countersunk head of the base 1. The compression spring 11 is sleeved on the guide post 12. One end of the compression spring 11 is connected to the first slider 2, and the other end of the compression spring 11 is connected to the base 1. The two compression springs 11 are respectively sleeved on the two guide posts 12 and distributed on both sides of the M8 bolt 10. By tightening the M8 bolt 10, the elastic force generated by the compression spring 11 controls the first slider 2 to move downward, thereby causing the dovetail groove slide to squeeze the second slider 3 to move forward, which in turn drives the clamping part 4 to move forward. Alternatively, by loosening the M8 bolt 10, the elastic force generated by the compression spring 11 controls the first slider 2 to move upward. The compression of the dovetail groove slide is reduced, and the second slider 3 moves backward, driving the clamping part 4 to move backward. The forward or backward movement of the clamping part 4 achieves the clamping or loosening effect of the clamping part 4 on the workpiece 16.

[0044] The second slider 3 is connected to the clamping part 4 via the core rod 5. A shaft hole for accommodating the core rod 5 is provided at the intersection of the first side plate 401 and the second side plate 402. The second slider 3 is fixed to the core rod 5. A guide groove is provided on the side of the second slider 3 near the base 1. Guide pins 13 are fixed to the inner sides of the base 1 respectively; the guide pins 13 are slidably connected to the guide groove. Specifically, the second slider 3 can be fixed to the core rod 5 by a headless hexagonal screw 7. The guide pins 13 are preferably headless screws. Two headless screws are fixed to the inner sides of the base 1 respectively, protruding 2mm from the inner side, and slidingly engaging with the guide groove at the side of the second slider 3 near the base 1, controlling the second slider 3 to move only back and forth, preventing it from loosening and falling off upwards. Rotating the M8 bolt 10 causes the first slider 2 to press down on the compression spring 11. The compression spring 11 generates elastic force, causing the first slider 2 to move upward. The first slider 2 presses the second slider 3 forward through the dovetail groove slide, that is, towards the clamping part 4. The force is transmitted to the clamping part 4 through the mandrel 5. When the clamping part 4 receives the push force from the second slider 3, it adaptively adjusts the angle to fit tightly against the workpiece 16. The two surfaces of the first side plate 401 and the second side plate 402 clamp different parts of the workpiece 16 respectively, realizing the clamping of the workpiece 16 from two directions.

[0045] It is important to note that the sliding surfaces of the first slider 2 and the second slider 3 include inclined planes. These inclined planes convert the downward or upward movement of the first slider 2 into the forward or backward movement of the second slider 3. Furthermore, the inclined planes allow for fine-tuning; by adjusting the angle of the inclined planes, the force required to rotate the M8 bolt 10 can be adjusted. When the angle of the inclined planes is larger, a slight rotation of the M8 bolt 10 can cause the first slider 2 to move downwards, allowing the second slider 3 to move a greater distance forward. A small change in the vertical direction can result in a larger horizontal movement. The inclined plane contact also provides better rigidity and guidance, reduces gaps, and improves the positioning accuracy of the first slider 2 and the second slider 3.

[0046] This invention provides a bidirectional workpiece clamping device with two flexible fixing methods: magnetic attraction and bolts. It solves the problems of existing clamps, which mostly have unidirectional clamping force and require cumbersome, time-consuming, and labor-intensive assembly and disassembly due to the use of bolts for fixing to the machine tool. Thanks to the arrangement of the first slider 2, the second slider 3, the base 1, and the strong magnet 8, the device is quickly fixed to the machine tool using magnetism. Tightening or loosening the M8 bolt 10 causes the spring force generated by the compression spring 11 to control the downward or upward movement of the first slider 2, thereby causing the dovetail groove slide to compress the slider forward or backward, achieving the clamping or releasing effect of the clamping part 4. Assembly and disassembly are convenient and efficient. If the workpiece 16 is subjected to significant processing force, a spare M12 bolt 9 can be used for fixing. The two fixing methods can be flexibly selected according to actual needs, improving the overall processing smoothness and expanding the application scenarios of the clamping device, making it widely applicable.

[0047] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A bidirectional workpiece clamping device, characterized in that, It includes a base (1), a drive unit, a slider unit, and a clamping unit (4). The base (1) serves as the mounting base for the drive unit, the slider unit, and the clamping unit (4). The drive unit drives the clamping unit (4) to move forward or backward through the slider unit. The clamping part (4) includes two intersecting and connected first side plates (401) and second side plates (402); When the clamping part (4) moves forward, the first side plate (401) contacts one side of the workpiece (16), and the second side plate (402) contacts the other side of the workpiece (16); When the clamping part (4) moves backward, the first side plate (401) and / or the second side plate (402) separate from the workpiece (16).

2. The bidirectional workpiece clamping device as described in claim 1, characterized in that, The bottom of the base (1) is provided with a countersunk hole, and a strong magnet (8) is contained in the countersunk hole.

3. The clamping device for bidirectional workpiece (16) as described in claim 1, characterized in that, The slider part includes a first slider (2) and a second slider (3). The first slider (2) is detachably fixed on the base (1), and the second slider (3) is rotatably connected to the clamping part (4). The first slider (2) and the second slider (3) are slidably connected by a dovetail groove.

4. The bidirectional workpiece clamping device as described in claim 3, characterized in that, The sliding surfaces of the first slider (2) and the second slider (3) include inclined surfaces.

5. The bidirectional workpiece clamping device as described in claim 3, characterized in that, The second slider (3) is connected to the clamping part (4) through the core rod (5). The first side plate (401) and the second side plate (402) are provided with a shaft hole for accommodating the core rod (5). The second slider (3) is fixed on the core rod (5).

6. The bidirectional workpiece clamping device as described in claim 3, characterized in that, The second slider (3) is provided with a guide groove on the side near the base (1), and guide pins (13) are fixed on the inner sides of the base (1); The guide pin (13) is slidably connected to the guide groove.

7. The bidirectional workpiece clamping device as described in claim 3, characterized in that, The drive unit includes a compression spring (11), which is disposed between the first slider (2) and the base (1).

8. The bidirectional workpiece clamping device as described in claim 7, characterized in that, The compression spring (11) comprises two springs, which are distributed opposite to each other on both sides of the base (1).

9. The bidirectional workpiece clamping device as described in claim 1, characterized in that, Pads (6) are provided on the opposite surfaces of the first side plate (401) and the second side plate (402).

10. The bidirectional workpiece clamping device as described in claim 1, characterized in that, A handle (14) is provided at the end of the base (1) away from the slider.

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