A clamping device

Abstract

The present invention relates to a clamping device, comprising a fixed base, a clamping unit and a self-locking unit; the clamping unit comprises a first clamping member; the self-locking unit comprises a fixed rod, a first limit block and a second limit block; the fixed rod is arranged in a receiving space along a second direction; the first limit block is arranged on the fixed rod, the first limit block can move axially along the fixed rod, and the first limit block is provided with a first friction slope; the second limit block is fixedly connected to the first clamping member, the second limit block is provided with a second friction slope, the second friction slope has a first state and a second state, when the second friction slope is in the first state, the first and second friction slopes abut and form a self-locking, and the first clamping member clamps the product; when the second friction slope is in the second state, the first and second friction slopes separate and release the self-locking, and the first clamping member can move along the first direction and release the product. The clamping device of the present invention has a long clamping stroke, the self-locking unit effectively self-locks, and the clamping effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of jigs, and in particular to a clamping device. Background Art

[0002] When a product needs to be fixed, there are generally two ways to secure it. One method is to design a specialized positioning jig. This method is relatively expensive, and the same positioning jig is often only suitable for the same product model, making it difficult to adjust after the design is finalized. The other method is to clamp the product with a clamping jig to secure it. Because the clamping jig can adjust the clamping stroke according to actual needs, it is more versatile and relatively low-cost than a positioning jig that only accommodates the same product model.

[0003] However, when dealing with larger products, existing clamping fixtures often struggle to balance volume and travel due to the need for a long clamping stroke. This results in a larger fixture and lower space utilization. Furthermore, these clamping fixtures often require an external drive to provide the clamping force, which consumes a lot of energy. Once the external drive loses its force, the product cannot be held securely. Summary of the Invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the problem that the existing clamping device is difficult to balance the volume and clamping stroke and relies on an external drive device to provide clamping force, and to provide a clamping device with a long clamping stroke and a self-locking structure that effectively provides locking.

[0005] The present invention provides a clamping device, comprising a fixed base, wherein a accommodating space is defined in the fixed base, wherein the accommodating space includes a first direction and a second direction perpendicular to each other; a clamping unit, wherein the clamping unit includes a first clamping member; the first clamping member is arranged in the accommodating space and can move along the first direction; a self-locking unit, wherein the self-locking unit includes a fixed rod, a first limit block and a second limit block; the fixed rod is arranged in the accommodating space along the second direction; the first limit block is arranged on the fixed rod, the first limit block can move along the axial direction of the fixed rod, and the first limit block is provided with a first friction inclined surface ; The second limit block is fixedly connected to the first clamping member, and the second limit block is provided with a second friction slope adapted to the first friction slope. When the second limit block moves following the first clamping member, the second friction slope has a first state and a second state. When the second friction slope is in the first state, the second friction slope abuts against the first friction slope and forms a self-locking, and the first clamping member clamps the product; when the second friction slope is in the second state, the second friction slope separates from the first friction slope and releases the self-locking, and the first clamping member can move along the first direction and release the product.

[0006] In one embodiment of the present invention, the extension direction of the first friction slope forms a friction angle with the first direction. , .

[0007] In one embodiment of the present invention, the first clamping member includes a first movable member and a first clamping member, the first movable member is arranged in the accommodating space and can be moved along the first direction, the first clamping member is arranged at one end of the first movable member, and the second limit block is arranged at the other end of the first movable member.

[0008] In one embodiment of the present invention, the clamping unit further includes a second clamping member, and the second clamping member is fixedly disposed on the fixed base.

[0009] In one embodiment of the present invention, the clamping unit further includes a second clamping member, and the second clamping member is disposed in the accommodating space so as to be movable along the first direction.

[0010] In one embodiment of the present invention, the second clamping member includes a second movable member and a second clamping member, the second movable member is arranged in the accommodating space and can move along the first direction, and the second clamping member is arranged at an end of the second movable member away from the first clamping member.

[0011] In one embodiment of the present invention, the first movable member and the second movable member are arranged opposite to each other, and racks are provided on adjacent surfaces of the first movable member and the second movable member along the first direction; the clamping unit also includes a gear, which is rotatably arranged in the accommodating space, and the gear engages with the racks of the first movable member and the second movable member.

[0012] In one embodiment of the present invention, the gear and the fixing rod are both centrally arranged in the accommodating space.

[0013] In one embodiment of the present invention, elastic blocking strips are provided on the surfaces of the first clamping member and the second clamping member that contact the product.

[0014] In one embodiment of the present invention, the self-locking unit also includes an adjusting rod, one end of which extends from the accommodating space and the other end of which abuts the first limit block; the adjusting rod is capable of moving along the second direction, wherein when the adjusting rod moves along the second direction, the first limit block abuts against or separates from the second limit block.

[0015] In one embodiment of the present invention, the self-locking unit also includes a spring, and the two ends of the spring respectively abut the first limit block and the fixed base, and the spring includes a first abutting state and a second abutting state. When the spring is in the first abutting state, the first limit block is separated from the second limit block and compresses the spring; when the spring is in the second abutting state, the spring abuts the first limit block, so that the first limit block abuts the second limit block.

[0016] The above technical solution of the present invention has the following advantages over the prior art:

[0017] When the clamping device described in the present invention is in use, the product is supported by the fixed base and fixed by the force of the first clamping member and the self-locking unit. The entire device forms a telescopic structure through the fixed base and the clamping unit, and the clamping stroke is long to accommodate products of different sizes. The space in the second direction is fully utilized to improve space utilization while avoiding product damage. The setting of the first friction bevel and the second friction bevel in the self-locking unit enables the first limit block and the second limit block to form self-locking when in contact, limiting the movement of the first clamping member so that the first clamping member clamps and fixes the product, which is particularly suitable for fixing large-sized products. After self-locking is formed, the external driving force of the first clamping member is removed, and the entire device can still ensure the clamping of the product and ensure that the force remains unchanged, resulting in a good clamping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0019] Figure 1 This is a schematic structural diagram of a clamping device from a first perspective in a preferred embodiment of the present invention;

[0020] Figure 2 A schematic structural diagram of the clamping device from a second perspective in a preferred embodiment of the present invention;

[0021] Figure 3 This is a schematic structural diagram from a first perspective of a self-locking unit in a preferred embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram from a second perspective of a self-locking unit in a preferred embodiment of the present invention;

[0023] Figure 5 This is a force analysis diagram of the first limit block in the preferred embodiment of the present invention;

[0024] Figure 6 This is a structural schematic diagram of a first clamping member in a preferred embodiment of the present invention;

[0025] Figure 7 This is a schematic structural diagram of a fixed base from a first perspective in a preferred embodiment of the present invention;

[0026] Figure 8 This is a schematic structural diagram of a fixed base from a second perspective in a preferred embodiment of the present invention;

[0027] Figure 9 This is a structural schematic diagram of a clamping unit in a preferred embodiment of the present invention;

[0028] Figure 10 This is a structural schematic diagram of a first clamping member in a preferred embodiment of the present invention;

[0029] Figure 11 This is a structural diagram of a self-locking unit in a preferred embodiment of the present invention;

[0030] Figure 12 This is a structural diagram of a self-locking unit in a preferred embodiment of the present invention;

[0031] Figure 13 This is a structural diagram of a self-locking unit in a preferred embodiment of the present invention;

[0032] Figure 14 This is a structural schematic diagram of a clamping unit in a preferred embodiment of the present invention;

[0033] Figure 15 It is an enlarged schematic diagram of a partial structure of a clamping unit in a preferred embodiment of the present invention;

[0034] Figure 16 Schematic diagram of the structure of a self-locking unit in a preferred embodiment of the present invention.

[0035] Explanation of the reference numerals in the specification: 10. fixed base; 11. cover body; 12. accommodating space; 13. gear; 14. limiting groove; 21. first clamping member; 211. first movable member; 212. first clamping member; 22. second clamping member; 221. second movable member; 222. second clamping member; 23. second avoidance space; 24. rack; 25. elastic stop strip; 26. convex strip; 27. groove; 31. fixed rod; 32. first limiting block; 321. first friction slope; 33. second limiting block; 331. second friction slope; 332. first avoidance space; 34. adjusting rod; 35. spring; 36. third limiting block; 361. third friction slope; 362. third avoidance space; 37. fourth limiting block; 371. fourth friction slope. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0037] The present invention discloses a clamping device, comprising a fixed base 10, wherein a receiving space 12 is defined in the fixed base 10, wherein the receiving space 12 includes a first direction and a second direction perpendicular to each other; a clamping unit, wherein the clamping unit includes a first clamping member 21; the first clamping member 21 is arranged in the receiving space 12 and can move along the first direction; a self-locking unit, wherein the self-locking unit includes a fixed rod 31, a first limit block 32 and a second limit block 33; the fixed rod 31 is arranged in the receiving space 12 along the second direction; the first limit block 32 is arranged on the fixed rod 31, and the first limit block 32 can move along the axial direction of the fixed rod 31, and the first limit block 32 is provided with a first friction inclined surface 321; The second limit block 33 is fixedly connected to the first clamping member 21, and the second limit block 33 is provided with a second friction slope 331 adapted to the first friction slope 321. When the second limit block 33 moves following the first clamping member 21, the second friction slope 331 has a first state and a second state. When the second friction slope 331 is in the first state, the second friction slope 331 abuts against the first friction slope 321 and forms a self-locking, and the first clamping member 21 clamps the product; when the second friction slope 331 is in the second state, the second friction slope 331 separates from the first friction slope 321 and releases the self-locking, and the first clamping member 21 can move along the first direction and release the product.

[0038] Reference Figure 1 and Figure 2As shown, the clamping device of the present invention includes a fixed base 10, which is used to cooperate with the clamping unit to clamp and fix the product, mainly providing support in the height direction of the product. A storage space 12 is defined within the fixed base 10. The storage space 12 is used to accommodate the self-locking unit and part of the clamping unit, providing them with an active area, protecting them, and ensuring the service life of the entire device. Preferably, the fixed base 10 includes a fixed base 10 body and a cover 11 connected to the fixed base 10 body, and the two are connected to form the storage space 12. The storage space 12 includes a first direction and a second direction that are perpendicular to each other. Preferably, the fixed base 10 is configured as a rectangle, with the first direction being the extension direction of one side of the rectangle and the second direction being the extension direction of the adjacent side of the above side, the two directions being perpendicular to each other, so that the self-locking unit can form a self-locking state. Of course, the fixed base 10 is not limited to being configured as a rectangle. In some other embodiments, the fixed base 10 can also be configured as a parallelogram, rhombus, square, etc. according to actual needs, as long as the storage space 12 and the two perpendicular directions are met.

[0039] Reference Figure 2 、 Figure 3 and Figure 4 As shown, the clamping device described in the present invention also includes a clamping unit and a self-locking unit. The clamping unit is used to cooperate with the fixed base 10 to clamp and fix the product. The clamping unit includes a first clamping member 21, which is arranged in the accommodating space 12 and can move along the first direction. When in use, the first clamping member 21 can move along the first direction and extend out of the accommodating space 12, so as to obtain a clamping distance that matches the size of the product, effectively clamp and fix the product, and the clamping stroke is long; facing products of different sizes, the first clamping member 21 can effectively clamp and fix, and has strong versatility. When not in use, the first clamping member 21 can move along the first direction and retract into the accommodating space 12 to reduce the volume and facilitate storage. The volume occupied in the clamping direction is small and the space utilization rate is high. It should be noted that it is possible to set only the first clamping member 21 and cooperate with structures such as walls, side walls of other products, etc. to achieve clamping and fixing of the product to be fixed; it is also possible to set a second clamping member 22 to cooperate with the first clamping member 21 to clamp and fix the product. The self-locking unit is used to form self-locking and provide a force for the clamping unit. The self-locking unit includes a fixed rod 31, a first limit block 32 and a second limit block 33. The fixed rod 31 is set in the accommodating space 12 along the second direction. By setting the fixed rod 31 and cooperating with the fixed base 10 to provide a force for the second limit block 33, the movement of the second limit block 33 and the first limit block 32 is limited, thereby achieving the limitation of the first clamping member 21. The limitation of its direction can facilitate the assembly of the entire device and the measurement of angles to achieve a more solid and stable self-locking. Reference Figure 6 and Figure 8As shown, a first stopper 32 is mounted on the fixing rod 31 and is movable along the axial direction of the fixing rod 31. The first stopper 32 is provided with a first friction slope 321. A second stopper 33 is fixedly connected to the first clamping member 21 and is provided with a second friction slope 331 that mates with the first friction slope 321. The arrangement of the first friction slope 321 and the second friction slope 331 allows the first stopper 32 and the second stopper 33 to form a self-locking mechanism when in contact, restricting the movement of the first clamping member 21 and thereby securing the product. This mechanism is particularly suitable for securing large products. Due to their small size and relatively low cost, various methods are available for securing small and medium-sized products, such as direct locking with fasteners, custom-designed structural members, or cylinders. However, larger products, due to their increased size, present a greater degree of difficulty in securing them. Conventional jigs no longer meet the demands of use, and clamping jigs are needed to secure products. However, existing clamping jigs often use telescopic cylinders to drive the clamping force. These jigs, which rely on an external drive to provide the clamping force, consume high energy and, if the external drive loses its force, cannot secure the product. Other jigs, which rely on screw threads to provide the clamping force, have their entire working stroke limited by the length of the screw. For products smaller than their working stroke, the screw of these jigs wastes space and takes up too much space. For products of similar or larger sizes, the screw of these jigs limits the clamping effect, making it more difficult to securely clamp larger products, or even impossible to do so. Furthermore, these jigs fail to effectively utilize the space perpendicular to the working stroke. For wider products, additional plates are often required to assist in clamping. Otherwise, the small clamping area results in excessive pressure, which can damage the product. To address this issue, the clamping device of the present invention utilizes a second stopper 33 to fully utilize the space in the second direction. By converting the length in the second direction into the working stroke of the first clamping member 21, the entire clamping device ensures a long working stroke and a compact size in the first direction while effectively utilizing the space in the second direction, ensuring a large clamping area and preventing product damage. The angle between the extension direction of the first friction slope 321 and the first direction can be adjusted to better secure the product, depending on the force required by different products. Auxiliary components can also be added to the two friction slopes to provide additional force, further enhancing the self-locking function of the stopper.When the second limit block 33 moves with the first clamping member 21, the second friction slope 331 has a first state and a second state. When the second friction slope 331 is in the first state, the second friction slope 331 abuts the first friction slope 321 and forms a self-locking state, allowing the first clamping member 21 to clamp the product. When the second friction slope 331 is in the second state, the second friction slope 331 separates from the first friction slope 321 and releases the self-locking state, allowing the first clamping member 21 to move in the first direction and release the product. Due to the provision of the self-locking unit, the entire clamping device can be used with different products by selecting the first limit block 32 with the first friction slope 321 at an appropriate angle to form a self-locking state, providing a firm and stable clamping for the product. At the same time, it does not require the force of an additional drive device, saving energy and having high versatility. When the clamping device of the present invention is used, the product is supported by the fixed base 10 and fixed by the force of the first clamping member 21 and the self-locking unit. The entire device forms a telescopic structure by combining a fixed base 10 with a clamping unit, with a long clamping stroke to accommodate products of different sizes. The space in the second direction is fully utilized to improve space utilization while avoiding product damage. The first friction bevel 321 and the second friction bevel 331 in the self-locking unit enable the first limit block 32 and the second limit block 33 to form a self-locking structure when in contact, limiting the movement of the first clamping member 21 so that the first clamping member 21 can clamp and fix the product. This is particularly suitable for fixing large-sized products. After self-locking, even if the external driving force of the first clamping member 21 is removed, the entire device can still ensure the clamping of the product and ensure that the force remains unchanged, resulting in a good clamping effect.

[0040] In some embodiments of the clamping device of the present invention, the extending direction of the first friction slope 321 forms a friction inclination angle with the first direction. , Considering that in actual use, in order to enable the self-locking unit to effectively self-lock when facing forces of different magnitudes, the angle between the extension direction of the first friction slope 321 and the first direction is limited, and this angle is the friction inclination angle. By limiting the friction angle , so that the self-locking unit can ensure self-locking no matter how much force it is subjected to, until the fixing rod 31 and other components are deformed, which makes it more versatile and has a good self-locking effect. Figure 5 As shown below, for the friction inclination The trapezoid in the figure is the first limit block 32, the vertical straight line in the figure represents the first direction, the horizontal straight line in the figure represents the second direction, and the The first limit block 32 is subjected to an external force perpendicular to the first friction slope 321. , external force Decompose the force into the component force in the first direction 、 , and the component in the second direction 、 According to the friction formula, the friction force on the first limit block 32 is , is the friction coefficient, the direction of friction and the external force Component of force in the second direction If you want to ensure that the first limit block 32 remains stationary no matter how much force it is subjected to when the second friction slope 331 is in the first state, the friction force in the second direction needs to be greater than the component of the external force in the second direction, that is, .by For example, , ,get That is, when the friction coefficient is greater than When the angle is , it can ensure that the first limit block 32 is always stationary. Calculating the friction coefficient, we can find that the larger the friction inclination angle, the smaller the demand for the friction coefficient. Taking dry friction as an example, the static friction coefficient between aluminum and aluminum is , the static friction coefficient between aluminum and mild steel is , the static friction coefficient between the brake material and cast iron is , the static friction coefficient between cast iron and cast iron is Considering the materials used in conventional fixtures, it can be seen that when the friction angle is greater than or equal to 60°, the first stopper 32 cannot move axially along the fixing rod 31. Further limiting the friction angle allows the first stopper 32 to remain stationary despite factors such as the material, self-locking to prevent the first clamping member 21 from moving in the first direction, thereby effectively securing and clamping the product.

[0041] Reference Figure 6As shown, the clamping device described in the present invention, in some embodiments, the first clamping member 21 includes a first movable member 211 and a first clamping member 212, the first movable member 211 is arranged in the accommodating space 12 so as to be movable along the first direction, the first clamping member 212 is arranged at one end of the first movable member 211, and the second limit block 33 is arranged at the other end of the first movable member 211. Preferably, the first movable member 211 is configured as a rectangular plate to adapt to the rectangular fixed base 10. The first movable member 211 and the first clamping member 212 can be either integrally formed or obtained by assembly. When in use, the first movable member 211 moves along the first direction, thereby driving the first clamping member 212 and the second limit block 33 to move, thereby adjusting the clamping range to clamp products of different sizes. Preferably, a first avoidance space 332 is provided on the surface of the second stopper 33 near the fixed rod 31, so that the second stopper 33 can effectively avoid the fixed rod 31 when approaching the fixed rod 31, preventing the fixed rod 31 from obstructing the movement of the second stopper 33, thereby improving space utilization. In some other embodiments, the second stopper 33 and the fixed rod 31 can also be staggered, such as with the fixed rod 31 positioned above the second stopper 33, to achieve the same avoidance effect.

[0042] Reference Figure 7 and Figure 8 As shown, in some embodiments of the clamping device of the present invention, the clamping unit further includes a second clamping member 22, which is fixedly mounted on the fixed base 10. By providing a fixed second clamping member 22, the entire device can achieve a secure clamping of the product without relying on external objects. Preferably, a limiting groove 14 is provided on the fixed base 10 along the first direction to limit the first movable plate and ensure that the first clamping member 21 can move stably along the first direction.

[0043] Reference Figure 9 As shown, the clamping device of the present invention, in some embodiments, the clamping unit further includes a second clamping member 22, and the second clamping member 22 is arranged in the accommodating space 12 so as to be movable along the first direction. By arranging the second clamping member 22 to be movable, the entire clamping device can clamp and fix products of larger sizes, and is more versatile. In some embodiments, the second clamping member 22 can be limited by structures such as walls; in some embodiments, the second clamping member 22 can be limited and self-locked by arranging a third limit block 36 and a fourth limit block 37 having the same structure as the first limit block 32 and the second limit block 33; in some embodiments, the first clamping member 21 and the second clamping member 22 can be connected in series to synchronously drive and form a self-locking of the second clamping member 22.

[0044] In some embodiments of the clamping device of the present invention, the second clamping member 22 includes a second movable member 221 and a second clamping member 222. The second movable member 221 is arranged in the accommodating space 12 so as to be movable along the first direction. The second clamping member 222 is arranged at an end of the second movable member 221 away from the first clamping member 212. Preferably, the second movable member 221 is configured as a rectangular plate to adapt to the rectangular fixed base 10. The second movable member 221 and the second clamping member 222 can be formed as one piece or obtained by assembly. Figure 14 As shown, when a structure with a third limit block 36 and a fourth limit block 37 is provided, the third limit block 36 is provided at one end of the second movable member 221 near the first clamping member 212, and the third limit block 36 is provided with a third friction slope 361; the fourth limit block 37 is provided on the fixed rod 31 and can move axially along the fixed rod 31, and the fourth limit block 37 is provided with a fourth friction slope 371 adapted to the third friction slope 361. The third friction slope 361 and the fourth friction slope 371 abut to form a self-locking of the second clamping member 22; the third friction slope 361 and the fourth friction slope 371 separate to release the self-locking, allowing the second clamping member 22 to move in the first direction and release the product. Preferably, a third avoidance space 362 is provided on the surface of the third limit block 36 near the fixed rod 31, so that the third limit block 36 can effectively avoid the fixed rod 31 when approaching the fixed rod 31, preventing the fixed rod 31 from hindering the movement of the third limit block 36, thereby improving space utilization. In some other embodiments, the third limit block 36 and the fixing rod 31 can also be staggered, such as the fixing rod 31 is arranged above the third limit block 36, to achieve the same avoidance effect. Figure 15 As shown, when the third and fourth limit blocks are provided, the adjacent surfaces of the first movable member 211 and the second movable member 221 are provided with concave and convex limit structures to achieve a stabilizing and limiting effect. Specifically, the first movable member 211 is provided with a convex strip, and the second movable member 221 is provided with a groove adapted to the convex strip.

[0045] Reference Figure 9 and Figure 10As shown, in some embodiments of the clamping device of the present invention, the first movable member 211 and the second movable member 221 are arranged opposite each other, and a rack 24 is provided on adjacent surfaces of the first movable member 211 and the second movable member 221 along the first direction. The clamping unit also includes a gear 13, which is rotatably disposed within the accommodating space 12 and engages with the racks 24 of the first movable member 211 and the second movable member 221. The arrangement of the gear 13 and the rack 24 enables the first clamping member 21 and the second clamping member 22 to form a series, synchronous telescopic structure. When the first clamping member 21 extends in the first direction, the rack 24 of the first clamping member 21 drives the gear 13 to rotate, which in turn drives the rack 24 of the second clamping member 22 to rotate, thereby driving the second clamping member 22 to extend in the first direction. This structure ensures high clamping precision, good telescopic synchronization, and a longer working stroke for the entire clamping device, enabling it to clamp and secure a wider range of products of different sizes.

[0046] In the clamping device described in the present invention, in some embodiments, the gear 13 and the fixed rod 31 are both centrally arranged in the accommodating space 12. The central arrangement of the gear 13 and the fixed rod 31 ensures the working stroke of the entire clamping device while effectively reducing the waste of space in the second direction. Taking the eccentric arrangement of the gear 13 and the fixed rod 31 close to the side where the first clamping member 21 is located as an example, the first clamping member 21 can extend a longer distance in the first direction, and the corresponding distance required for the second limit block 33 in the second direction is longer, which increases the unnecessary volume of the entire device. To this end, by setting it in the center, it is possible to ensure the working stroke and reduce space waste. At the same time, the symmetrical structure increases the structural stability of the entire device and ensures its service life.

[0047] Reference Figure 2 As shown, in some embodiments of the clamping device of the present invention, the surfaces of the first clamping member 21 and the second clamping member 22 that contact the product are both provided with elastic retaining strips 25. The provision of the elastic retaining strips 25 effectively prevents damage caused by unnecessary friction and collision between the product and the clamping members, ensuring the surface quality of the product and the clamping device. At the same time, it also provides a certain floating space for the two clamping members, allowing them to float slightly according to the surface shape of the product, better fit the product, and ensure the quality of the clamping fixation.

[0048] In some embodiments of the clamping device of the present invention, the self-locking unit further comprises an adjusting rod 34, one end of which extends from the accommodating space 12 and the other end of which abuts against the first limit block 32; the adjusting rod 34 is movable along the second direction, wherein when the adjusting rod 34 moves along the second direction, the first limit block 32 abuts against or separates from the second limit block 33. Figure 11 and Figure 13 As shown, in some embodiments, the axial direction of the adjustment rod 34 is arranged along the first direction. A second avoidance space 23 is provided on the corresponding clamping member for the adjustment rod 34 to pass through. When the first limit block 32 needs to be unlocked or self-locked, the adjustment rod 34 is controlled to move along the second direction to provide a force to separate or abut the first limit block 32 and the second limit block 33. Figure 12 As shown, in some embodiments, the axial direction of the adjustment rod 34 is set along the second direction, and a second avoidance space 23 is provided on the cavity wall of the corresponding fixed base 10. When a third limit block 36 and a fourth limit block 37 are provided, a second adjustment rod 34 can be provided so that the fourth limit block 37 and the third limit block 36 abut or separate to achieve self-locking or unlocking. It should be noted that the adjustment rod 34 can be fixedly connected to the limit block or can be set separately. When set separately, it is necessary to pay attention to the setting of the position of the adjustment rod 34 to avoid failure to provide force to the limit block and thus failure to unlock the limit block. The structure of the adjustment rod 34 is simple and effectively realizes the unlocking or self-locking of the limit block.

[0049] Reference Figure 11 、 Figure 12 and Figure 13 As shown, the clamping device described in the present invention, in some embodiments, the self-locking unit further includes a spring 35, the two ends of the spring 35 respectively abut the first limit block 32 and the fixed base 10, and the spring 35 includes a first abutting state and a second abutting state. When the spring 35 is in the first abutting state, the first limit block 32 is separated from the second limit block 33 and compresses the spring 35; when the spring 35 is in the second abutting state, the spring 35 abuts the first limit block 32, so that the first limit block 32 abuts the second limit block 33. By providing the spring 35, the limit block can be subjected to the elastic force of the spring 35, which can not only enable the entire device to self-lock instantly in the appropriate position, but also further ensure the stability of the self-locking. Preferably, the spring 35 is mounted on the fixed rod 31 to prevent the spring 35 from being misplaced, and at the same time effectively improve the space utilization of the device; in some other embodiments, the spring 35 can also be limited by the spring 35 limiting shaft. Refer to Figure 16 As shown, when a third limit block 36 and a fourth limit block 37 are provided, preferably, both ends of the spring 35 abut against the fourth limit block 37 and the first limit block 32 respectively, so as to provide elastic force to both at the same time and ensure instant self-locking.

[0050] The working principle of the clamping device of the present invention is:

[0051] Taking the clamping device with gear 13 and rack 24 as an example, first, the first and second stoppers 32 and 33 are unlocked by adjusting the lever 34, and the first clamping member 21 is displaced in the first direction out of the fixed base 10. At this point, the rack 24 of the first clamping member 21 rotates the gear 13, which in turn rotates the rack 24 of the second clamping member 22, thereby extending the second clamping member 22 in the first direction. This adjusts the positions of the first and second clamping members 21 and 22, reserving space for the product. Next, the product is placed on the cover 11 of the fixed base 10, and the positions of the first and second clamping members 21 and 22 are adjusted again, so that the elastic stop 25 contacts the product surface. Finally, the first stopper 32, under the elastic force of the spring 35, instantly self-locks, securing the first and second clamping members 21 and 22 to the product. The entire device, through the fixed base 10 and the clamping unit, forms a telescopic structure with a long clamping stroke to accommodate products of different sizes. The space in the second direction is fully utilized to improve space utilization while avoiding product damage. The setting of the first friction bevel 321 and the second friction bevel 331 in the self-locking unit enables the first limit block 32 and the second limit block 33 to form self-locking when in contact, limiting the movement of the first clamping member 21 so that the first clamping member 21 can clamp and fix the product, which is particularly suitable for fixing large-sized products. After forming self-locking, the external driving force of the first clamping member 21 is removed, and the entire device can still ensure the clamping of the product and ensure that the force remains unchanged, resulting in a good clamping effect. The setting of the angle range of the friction inclination angle ensures that after self-locking, no matter how much force is applied to the end of the first clamping member 21 away from the fixing rod 31 along the first direction, the first clamping member 21 can effectively fix and clamp the product; the structure of the gear 13 and the rack 24 ensures that the second clamping member 22 can also effectively fix and clamp the product while ensuring that the clamping device has high clamping accuracy and good telescopic synchronization.

[0052] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A clamping device, characterized in that: include: A fixed base, wherein a receiving space is defined in the fixed base, and the receiving space includes a first direction and a second direction perpendicular to each other; a clamping unit, the clamping unit comprising a first clamping member; the first clamping member is disposed in the accommodating space and is movable along the first direction; The self-locking unit comprises a fixed rod, a first limit block, a second limit block and a spring; the fixed rod is arranged in the accommodating space along the second direction; the first limit block is arranged on the fixed rod, the first limit block can move along the axial direction of the fixed rod, and the first limit block is provided with a first friction inclined surface; the second limit block is fixedly connected to the first clamping member, the second limit block is provided with a second friction inclined surface adapted to the first friction inclined surface, and when the second limit block moves following the first clamping member, the second friction inclined surface has a first state and a second state. When the second friction inclined surface is in the first state, the second friction inclined surface abuts against the first friction inclined surface and forms a self-locking state, and the first clamping member clamps the product; when the second friction inclined surface is in the second state, the second friction inclined surface separates from the first friction inclined surface and releases the self-locking state, and the first clamping member can move along the first direction and release the product; The two ends of the spring respectively abut the first limit block and the fixed base, and the spring includes a first abutting state and a second abutting state. When the spring is in the first abutting state, the first limit block is separated from the second limit block and compresses the spring; when the spring is in the second abutting state, the spring abuts the first limit block, so that the first limit block abuts the second limit block.

2. The clamping device according to claim 1, characterized in that: The extension direction of the first friction slope forms a friction angle with the first direction , .

3. The clamping device according to claim 1, characterized in that: The first clamping member includes a first movable member and a first clamping member. The first movable member is movable along the first direction and is arranged in the accommodating space. The first clamping member is arranged at one end of the first movable member, and the second limit block is arranged at the other end of the first movable member.

4. The clamping device according to claim 3, characterized in that: The clamping unit further includes a second clamping member, which is fixedly disposed on the fixed base.

5. The clamping device according to claim 3, characterized in that: The clamping unit further includes a second clamping member, which is disposed in the accommodating space and is movable along the first direction.

6. The clamping device according to claim 5, characterized in that: The second clamping member includes a second movable member and a second clamping member. The second movable member is arranged in the accommodating space so as to be movable along the first direction. The second clamping member is arranged at an end of the second movable member away from the first clamping member.

7. The clamping device according to claim 6, characterized in that : The first movable member and the second movable member are arranged opposite to each other, and racks are provided on adjacent surfaces of the first movable member and the second movable member along the first direction; the clamping unit also includes a gear, which is rotatably arranged in the accommodating space, and the gear engages with the racks of the first movable member and the second movable member.

8. The clamping device according to claim 7, characterized in that: The gear and the fixing rod are both centrally arranged in the accommodating space.

9. The clamping device according to claim 3 or 4, characterized in that: Surfaces of the first clamping member and the second clamping member contacting the product are both provided with elastic blocking strips.

10. The clamping device according to claim 1, characterized in that: The self-locking unit also includes an adjusting rod, one end of which extends from the accommodating space and the other end of which abuts the first limit block; the adjusting rod is capable of moving along the second direction, wherein when the adjusting rod moves along the second direction, the first limit block abuts against or separates from the second limit block.

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