CN117207118A

CN117207118A - Universal clamping device

Info

Publication number: CN117207118A
Application number: CN202311339681.XA
Authority: CN
Inventors: 章登亮
Original assignee: Bozhon Precision Industry Technology Co Ltd
Current assignee: Bozhon Precision Industry Technology Co Ltd
Priority date: 2023-10-17
Filing date: 2023-10-17
Publication date: 2023-12-12

Abstract

The invention belongs to the technical field of universal clamps and discloses a universal clamping device which comprises a fixed plate, a lifting assembly, a fixed assembly and a clamping assembly, wherein the lifting assembly comprises a bearing plate provided with a containing groove, a lifting plate connected with the bearing plate and a lifting driving piece for driving the lifting plate to lift on the fixed plate, the fixed assembly comprises a plurality of limiting pieces, each limiting piece comprises a plurality of limiting parts with size reduced stepwise along the direction far away from the fixed plate, so as to construct a plurality of containing stations with the size gradually increased along with the lifting space of the lifting plate in the containing groove, and the clamping assembly comprises clamping jaws and a clamping driving piece for driving the clamping jaws to slide on the fixed plate. A plurality of accommodating stations with gradually increased space size along with lifting of the lifting plate are constructed in the accommodating groove, so that compatibility of products with various specifications is realized on the premise of not changing the overall horizontal size, the occupied area is reduced, and the space utilization rate in the height direction is improved.

Description

Universal clamping device

Technical Field

The invention relates to the technical field of universal clamps, in particular to a universal clamping device.

Background

When carrying out the screwed connection process to the touch panel, need use anchor clamps to press from both sides tight touch screen to make things convenient for operating personnel to work, but the specification of touch screen is various, and the overall dimension of touch screen of every specification is different, consequently when pressing from both sides tightly to different specifications touch screen, often need change not unidimensional anchor clamps and satisfy the clamping demand, but change different anchor clamps, need dismantle original anchor clamps, install the anchor clamps of adaptation again, waste time and energy, work efficiency is low.

At present, in order to solve the problem of dismouting anchor clamps, set up the clamping piece that can carry out the displacement at the horizontal direction generally, through the horizontal migration of clamping piece to need not to change anchor clamps alright press from both sides the touch-sensitive screen of different size specifications, but this kind of anchor clamps because need remove at the horizontal direction, consequently need occupy very big horizontal space, satisfy the adjustment demand, its area is great, and the space utilization of direction of height is low.

Disclosure of Invention

The invention aims to provide a universal clamping device which has the advantages of good universality, small occupied area and high space utilization rate.

To achieve the purpose, the invention adopts the following technical scheme:

a universal clamping device, the universal clamping device comprising:

a fixing plate;

the lifting assembly comprises a bearing plate, a lifting plate and a lifting driving piece, wherein the bearing plate is provided with a containing groove for containing a product, the bearing plate is fixedly arranged on the lifting plate, the lifting plate is arranged on the fixed plate in a lifting manner along the height direction, and the lifting driving piece is used for driving the lifting plate to lift;

the fixing assembly comprises a plurality of limiting parts, one ends of the limiting parts are fixedly arranged on the fixing plate, the other ends of the limiting parts penetrate through the bearing plate and the lifting plate and are arranged in the accommodating groove, each limiting part comprises a plurality of limiting parts with different volumes, the volume sizes of the limiting parts are reduced stepwise along the direction away from the fixing plate, and therefore a plurality of accommodating stations with the rising space sizes gradually increased along with the lifting plate are built in the accommodating groove;

the clamping assembly comprises clamping jaws and a clamping driving piece, wherein the clamping jaws are slidably arranged on the fixing plate, and the clamping driving piece is used for driving the clamping jaws to slide.

Optionally, a plurality of tight portions of top are equipped with on the clamping jaw, a plurality of tight portions of top with a plurality of the height one-to-one of spacing portion, a plurality of tight portions of top with the distance between the spacing portion of corresponding height is along keeping away from the direction of fixed plate increases gradually.

Optionally, the fixing assembly further comprises an absorbing member, the bearing plate is provided with a mounting through hole, one end of the absorbing member is fixedly arranged on the lifting plate, and the other end of the absorbing member is arranged in the mounting through hole in a penetrating mode.

Optionally, the fixing assembly further comprises an auxiliary limiting column, a mounting notch is formed in the side wall of the accommodating groove, and the auxiliary limiting column is arranged in the mounting notch.

Optionally, the fixing assembly further comprises a plurality of cushion blocks corresponding to the limiting pieces one by one, one side of each cushion block is detachably connected with the fixing plate, and the other end of each cushion block is detachably connected with the limiting piece.

Optionally, the universal clamping device further comprises a plurality of size detection pieces corresponding to the accommodating stations one by one, the bearing plate is provided with a plurality of mounting grooves corresponding to the size detection pieces one by one, and the size detection pieces are fixedly arranged in the corresponding mounting grooves.

Optionally, the lifting assembly further comprises a lifting connecting plate, a screw rod and a sliding sleeve, wherein the lifting connecting plate penetrates through the fixing plate and is connected with the lifting plate, the sliding sleeve is fixedly arranged on the lifting connecting plate and is provided with a threaded through hole, one end of the screw rod is connected with the output end of the lifting driving piece, the other end of the screw rod penetrates through the threaded through hole and is rotatably arranged on the fixing plate, and the screw rod is in threaded fit with the threaded through hole.

Optionally, the general clamping device further comprises a sliding component, the sliding component comprises a lifting sliding rail and a lifting sliding block, the lifting sliding block is slidably arranged on the lifting sliding rail, the lifting sliding block is fixedly arranged on the lifting connecting plate, and the lifting sliding rail is fixedly arranged on the fixing plate.

Optionally, the sliding assembly further comprises a plurality of guide posts, the fixed plate is provided with guide holes corresponding to the guide posts one by one, one end of each guide post is connected to the lifting plate, and the other end of each guide post is slidably arranged in the corresponding guide hole in a penetrating mode.

Optionally, the clamping assembly further comprises a clamping connecting plate and a clamping sliding block, the clamping driving piece is fixedly arranged on the clamping connecting plate, the clamping connecting plate is fixedly arranged on the fixing plate, a sliding protrusion is arranged on the clamping driving piece, a sliding groove is formed in the clamping sliding block, the clamping sliding block is connected with the output end of the clamping driving piece, the clamping driving piece slides on the sliding protrusion through the sliding groove, and the clamping jaw is fixedly arranged on the clamping sliding block.

The invention has the beneficial effects that:

the invention provides a general clamping device, wherein one end of a limiting piece is connected to a fixed plate, the other end of the limiting piece penetrates through a lifting plate and a bearing plate and is arranged in a containing groove, a plurality of limiting parts with size reduced in a step-like manner along the direction far away from the fixed plate are arranged on the limiting piece, so that a plurality of containing stations with the rising space size of the lifting plate gradually increasing are constructed in the containing groove, and finally, a product is fixed in the containing stations by utilizing clamping jaws, so that the compatibility of the external dimensions of products with various specifications is realized on the premise of not changing the overall horizontal dimension, the occupied area of the whole device is reduced, and the space utilization rate in the height direction is improved.

Drawings

FIG. 1 is a schematic view of a general clamping device according to the present invention from a first perspective;

FIG. 2 is a schematic view of a general clamping device according to a second aspect of the present invention;

FIG. 3 is a schematic view of a third view of the universal clamping device of the present invention;

FIG. 4 is a schematic view of the structure of the clamping assembly in the universal clamping device of the present invention;

fig. 5 is a schematic view showing the arrangement of the limiting member on the fixing plate in the universal clamping device of the present invention.

In the figure:

1. a fixing plate;

2. a lifting assembly; 21. a carrying plate; 211. an accommodating groove; 22. a lifting plate; 23. a lifting driving member; 24. lifting the connecting plate; 25. a screw rod; 26. a sliding sleeve; 27. a rotating head; 28. a clamping plate; 29. reinforcing rib plates;

3. a fixing assembly; 31. a limiting piece; 311. a first limit part; 312. a second limit part; 32. an absorbing member; 33. an auxiliary limit column; 34. a cushion block;

4. a clamping assembly; 41. a clamping jaw; 411. a body plate; 412. a first tightening part; 413. a second tightening part; 414. a third tightening part; 42. clamping the driving member; 43. clamping the connecting plate; 44. clamping the sliding block;

5. a size detecting member;

6. a sliding assembly; 61. a lifting slide block; 62. lifting the sliding rail; 63. and a guide post.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In order to improve the universality of various specifications of products, reduce the occupied area and improve the space utilization rate in the height direction, the embodiment provides a universal clamping device.

As shown in fig. 1 to 5, the universal clamping device comprises a fixing plate 1, a lifting assembly 2, a fixing assembly 3 and a clamping assembly 4, the lifting assembly 2 comprises a bearing plate 21, a lifting plate 22 and a lifting driving member 23, a containing groove 211 for containing products is formed in the bearing plate 21, the bearing plate 21 is fixedly arranged on the lifting plate 22, the lifting plate 22 is arranged on the fixing plate 1 in a lifting manner along the height direction, the lifting driving member 23 is used for driving the lifting plate 22 to lift, the fixing assembly 3 comprises a plurality of limiting members 31, one ends of the limiting members 31 are fixedly arranged on the fixing plate 1, the other ends penetrate through the bearing plate 21 and the lifting plate 22 and are arranged in the containing groove 211, each limiting member 31 comprises a plurality of limiting portions with different volumes, the volume sizes of the limiting portions are reduced in a step-shaped manner along the direction far away from the fixing plate 1, so as to construct a plurality of containing stations with the increasing space sizes of the lifting plate 22 in the containing groove 211, the clamping assembly 4 comprises clamping jaws 41 and clamping driving members 42, the clamping jaws 41 are slidably arranged on the fixing plate 1, and the clamping driving members 41 are used for driving the clamping jaws 41 to slide.

One end of the limiting piece 31 is connected to the fixed plate 1, the other end passes through the lifting plate 22 and the bearing plate 21 to be placed in the accommodating groove 211, and a plurality of limiting parts with size reduced in a step-like manner are arranged on the limiting piece 31 along the direction away from the fixed plate 1, so that a plurality of accommodating stations with the size gradually increased along with the lifting space of the lifting plate 22 are constructed in the accommodating groove 211, and finally, products are fixed in the accommodating stations by utilizing the clamping jaw 41, so that the compatibility of the external dimensions of products with various specifications is realized on the premise of not changing the overall horizontal dimension, the occupied area of the overall device is reduced, and the space utilization rate of the height direction is improved.

The universal clamping device can be used for clamping and fixing various specifications of various products, in this embodiment, the universal clamping device is mainly used for clamping and fixing products with three specifications of large, medium and small sizes of a touch screen, therefore, as shown in fig. 5, each limiting piece 31 comprises two gradient limiting parts, including a first limiting part 311 with a larger volume and a second limiting part 312 with a smaller volume, wherein the first limiting part 311 is positioned below the second limiting part 312, when the lifting plate 22 is positioned at an initial position, the upper surface of the first limiting part 311 is higher than the bottom surface of the accommodating groove 211, at the moment, the first limiting part 311 of the limiting pieces 31 forms an accommodating station with the smallest space size, at the moment, corresponds to the small-size touch screen, when the medium-size touch screen needs to be clamped, only the lifting plate 22 is required to be driven to ascend by the lifting driving piece 23, at this time, the bottom surface of the accommodating groove 211 is higher than the upper surface of the first limiting part 311 and lower than the upper surface of the second limiting part 312, at this time, the second limiting parts 312 of the plurality of limiting pieces 31 are arranged in the accommodating groove 211 to form an accommodating station for accommodating a touch screen with medium size, when the touch screen with large size needs to be clamped, only the lifting plate 22 is required to be driven to ascend by the lifting driving piece 23, at this time, the bottom surface of the accommodating groove 211 is higher than the surface of the limiting piece 31, the accommodating groove 211 forms an accommodating station for accommodating the touch screen with large size by itself, wherein, as shown in fig. 5, the limiting piece 31 fixedly connected to the fixing plate 1 comprises four limiting blocks and two limiting columns, the four limiting blocks are arranged on one side of the fixing plate 1 close to the clamping jaw 41, the two limiting columns are fixed on one side far away from the clamping jaw 41, carry out coarse localization through four stoppers to the touch-sensitive screen for the touch-sensitive screen is arranged in the station that holds that corresponds, later utilizes clamping jaw 41 to promote the touch-sensitive screen, makes the touch-sensitive screen deviate from one side of clamping jaw 41 and two spacing post butt, realizes pressing from both sides tight fixedly, because spacing post is the point contact with the touch-sensitive screen, thereby reduce the indentation that forms on the touch-sensitive screen at the tight in-process of clamp, wherein clamping assembly 4 sets up in the one corner of fixed plate 1, clamping jaw 41 realizes fixedly through a corner of tight touch-sensitive screen in the top, thereby utilize a clamping jaw 41 alright realize multilateral fixed effect, thereby reduce clamping assembly 4's quantity, reduce manufacturing cost.

Alternatively, as shown in fig. 4 and 5, the clamping jaw 41 is provided with a plurality of tightening portions, the heights of the tightening portions and the limiting portions are in one-to-one correspondence, and the distances between the tightening portions and the limiting portions with the corresponding heights gradually increase along the direction away from the fixed plate 1. By arranging the jacking parts with the heights corresponding to the limiting parts one by one on the clamping jaw 41, the sliding stroke of the clamping jaw 41 corresponds to the specification of a product, the clamping jaw 41 does not need to move in a full stroke all the time, and the energy consumption is reduced. In the present embodiment, since three specifications of touch screens are aimed, the clamping jaw 41 includes a body plate 411, a first tightening part 412, a second tightening part 413 and a third tightening part 414, wherein the first tightening part 412 is mutually matched with the accommodating groove 211 for clamping a large-sized touch screen, the second tightening part 413 is matched with the second limiting part 312 for clamping a medium-sized touch screen, the third tightening part 414 is matched with the first limiting part 311 for clamping a small-sized touch screen, the first tightening part 412 is cylindrical, the second tightening part 413 is a U-shaped plate, the third tightening part 414 is a push rod, the first tightening part 412 is arranged on the upper surface of the second tightening part 413, the second tightening part 413 is arranged on the body plate 411, and the third tightening part 414 is arranged on the lower surface of the second tightening part 413.

Optionally, as shown in fig. 1, the fixing assembly 3 further includes an absorbing member 32, the bearing plate 21 is provided with a mounting through hole, one end of the absorbing member 32 is fixedly arranged on the lifting plate 22, and the other end is arranged in the mounting through hole in a penetrating manner. By arranging the adsorption piece 32, the product is adsorbed by the adsorption piece 32 and is firmly fixed on the bearing plate 21, so that the fixing effect is improved, and the product dislocation is avoided. In this embodiment, the side of the adsorbing member 32 facing the product is in a horn shape, and the middle of the adsorbing member is provided with a vent hole, and the adsorbing member 32 is connected with the air extractor, so that air on the side facing the product is pumped away, thereby forming a low pressure area, generating suction force, and adsorbing the product on the carrier plate 21.

Optionally, as shown in fig. 1, the fixing assembly 3 further includes an auxiliary limiting post 33, and a mounting slot is formed on a side wall of the accommodating groove 211, and the auxiliary limiting post 33 is disposed in the mounting slot. By providing the auxiliary stopper 33 on the side wall of the accommodating recess 211, the product is in point contact with the side wall of the accommodating recess 211, thereby reducing the indentation caused to the surface of the product when clamping and fixing. The number of the auxiliary limiting posts 33 may be plural according to the requirement, in this embodiment, four auxiliary limiting posts 33 are disposed on the side walls of the accommodating recess 211, and two groups of auxiliary limiting posts are disposed on the side walls of the two sides of the accommodating recess 211.

Optionally, as shown in fig. 1 and 5, the fixing assembly 3 further includes a spacer 34 corresponding to the plurality of limiting members 31 one by one, one side of the spacer 34 is detachably connected to the fixing plate 1, and the other end of the spacer 34 is detachably connected to the limiting member 31. The limiting piece 31 is detachably connected to the fixed plate 1 through the cushion blocks 34, so that the cushion blocks 34 with different heights can be conveniently replaced to compensate the height of the limiting piece 31, and products with more specifications and sizes can be matched. In the present embodiment, both sides of the pad 34 are connected to the fixing plate 1 and the stopper 31, respectively, by bolts.

Optionally, as shown in fig. 1, the universal clamping device further includes size detecting members 5 corresponding to the plurality of accommodating stations one by one, and mounting grooves corresponding to the plurality of size detecting members 5 one by one are formed on the carrying plate 21, and the size detecting members 5 are fixedly arranged in the corresponding mounting grooves. By providing the size detecting pieces 5 in the carrier plate 21 in one-to-one correspondence with the plurality of accommodating stations, it is ensured that the products of the corresponding specification sizes are placed in the accommodating stations. In the present embodiment, the depth of the installation recess is greater than the thickness of the size detecting member 5, so that the size detecting member 5 does not interfere with the touch screen. Since in the present embodiment, the three dimension detecting members 5 are provided for clamping and fixing the touch panels of three dimensions, respectively corresponding to the touch panels of one dimension.

Optionally, as shown in fig. 2 and 3, the lifting assembly 2 further includes a lifting connection plate 24, a screw rod 25 and a sliding sleeve 26, the lifting connection plate 24 passes through the fixing plate 1 to be connected with the lifting plate 22, the sliding sleeve 26 is fixedly arranged on the lifting connection plate 24 and is provided with a threaded through hole, one end of the screw rod 25 is connected with the output end of the lifting driving member 23, the other end passes through the threaded through hole to be rotatably arranged on the fixing plate 1, and the screw rod 25 is in threaded fit with the threaded through hole. The lifting plate 22 is driven to lift by using a lead screw transmission mode, so that the lifting plate has higher transmission efficiency and transmission precision, and has strong load capacity and is suitable for driving the lifting plate 22 and the structure on the lifting plate 22 to lift. In this embodiment, the lifting assembly 2 further includes a rotating head 27 and a clamping plate 28, the clamping plate 28 is used for fixedly connecting the rotating head 27 to the fixed plate 1, the screw 25 is rotatably inserted in the rotating head 27, and in order to strengthen the structural strength between the lifting connecting plate 24 and the lifting plate 22, a reinforcing rib plate 29 is further disposed between the lifting connecting plate 24 and the lifting plate 22.

Optionally, as shown in fig. 2 and 3, the universal clamping device further includes a sliding assembly 6, where the sliding assembly 6 includes a lifting slide rail 62 and a lifting slide block 61, the lifting slide block 61 is slidably disposed on the lifting slide rail 62, the lifting slide block 61 is fixedly disposed on the lifting connection plate 24, and the lifting slide rail 62 is fixedly disposed on the fixing plate 1. By providing the lifting slide rail 62 and the lifting slide block 61 between the fixed plate 1 and the lifting connection plate 24, the lifting connection plate 24 slides on the fixed plate 1 more easily. In the present embodiment, the sliding assembly 6 is provided with two sets of lifting slide rails 62 and lifting sliders 61 to improve the sliding stability.

Optionally, as shown in fig. 2 and 3, the sliding assembly 6 further includes a plurality of guide posts 63, the fixed plate 1 is provided with guide holes corresponding to the plurality of guide posts 63 one by one, one end of the guide post 63 is connected to the lifting plate 22, and the other end of the guide post 63 is slidably inserted into the guide holes. By arranging the guide post 63, the lifting plate 22 is guided and limited, and the lifting plate 22 is prevented from sliding in the lifting process.

Optionally, as shown in fig. 4, the clamping assembly 4 further includes a clamping connection plate 43 and a clamping slider 44, the clamping driving member 42 is fixedly arranged on the clamping connection plate 43, the clamping connection plate 43 is fixedly arranged on the fixing plate 1, a sliding protrusion is arranged on the clamping driving member 42, a sliding groove is formed in the clamping slider 44, the clamping slider 44 is connected with the output end of the clamping driving member 42, and slides on the sliding protrusion of the clamping driving member 42 through the sliding groove, and the clamping jaw 41 is fixedly arranged on the clamping slider 44. By using the clamping slide 44, the clamping jaw 41 slides more smoothly under the drive of the clamping drive 42.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. The general clamping device, its characterized in that, general clamping device includes:

a fixed plate (1);

the lifting assembly (2), the lifting assembly (2) comprises a bearing plate (21), a lifting plate (22) and a lifting driving piece (23), wherein an accommodating groove (211) for accommodating products is formed in the bearing plate (21), the bearing plate (21) is fixedly arranged on the lifting plate (22), the lifting plate (22) is arranged on the fixed plate (1) in a lifting manner along the height direction, and the lifting driving piece (23) is used for driving the lifting plate (22) to lift;

the fixing assembly (3), the fixing assembly (3) comprises a plurality of limiting pieces (31), one ends of the limiting pieces (31) are fixedly arranged on the fixing plate (1), the other ends of the limiting pieces penetrate through the bearing plate (21) and the lifting plate (22) and are arranged in the accommodating groove (211), each limiting piece (31) comprises a plurality of limiting parts with different volumes, the volume sizes of the limiting parts are reduced stepwise along the direction away from the fixing plate (1), and a plurality of accommodating stations with the rising space sizes of the lifting plate (22) gradually increasing are formed in the accommodating groove (211);

the clamping assembly (4), the clamping assembly (4) comprises clamping jaws (41) and clamping driving pieces (42), the clamping jaws (41) are slidably arranged on the fixed plate (1), and the clamping driving pieces (42) are used for driving the clamping jaws (41) to slide.

2. Universal clamping device according to claim 1, characterized in that the clamping jaw (41) is provided with a plurality of tightening parts, the heights of which correspond to the heights of the limiting parts one by one, and the distances between the tightening parts and the limiting parts of the corresponding heights gradually increase along the direction away from the fixed plate (1).

3. The universal clamping device according to claim 1, wherein the fixing assembly (3) further comprises an absorbing member (32), the bearing plate (21) is provided with a mounting through hole, one end of the absorbing member (32) is fixedly arranged on the lifting plate (22), and the other end of the absorbing member is arranged in the mounting through hole in a penetrating manner.

4. The universal clamping device according to claim 1, wherein the fixing assembly (3) further comprises an auxiliary limiting post (33), a mounting notch is formed in the side wall of the accommodating groove (211), and the auxiliary limiting post (33) is arranged in the mounting notch.

5. Universal clamping device according to claim 1, characterized in that the fixing assembly (3) further comprises a cushion block (34) corresponding to the limiting pieces (31) one by one, one side of the cushion block (34) is detachably connected with the fixing plate (1), and the other end of the cushion block (34) is detachably connected with the limiting pieces (31).

6. The universal clamping device according to claim 1, further comprising size detection pieces (5) corresponding to the accommodating stations one by one, wherein mounting grooves corresponding to the size detection pieces (5) one by one are formed in the bearing plate (21), and the size detection pieces (5) are fixedly arranged in the corresponding mounting grooves.

7. The universal clamping device according to claim 1, wherein the lifting assembly (2) further comprises a lifting connecting plate (24), a screw rod (25) and a sliding sleeve (26), the lifting connecting plate (24) penetrates through the fixing plate (1) to be connected with the lifting plate (22), the sliding sleeve is fixedly arranged on the lifting connecting plate (24) and is provided with a threaded through hole, one end of the screw rod (25) is connected with the output end of the lifting driving piece (23), the other end of the screw rod (25) penetrates through the threaded through hole to be rotatably arranged on the fixing plate (1), and the screw rod (25) is in threaded fit with the threaded through hole.

8. The universal clamping device according to claim 7, further comprising a sliding assembly (6), wherein the sliding assembly (6) comprises a lifting slide rail (62) and a lifting slide block (61), the lifting slide block (61) is slidably arranged on the lifting slide rail (62), the lifting slide block (61) is fixedly arranged on the lifting connection plate (24), and the lifting slide rail (62) is fixedly arranged on the fixing plate (1).

9. The universal clamping device according to claim 8, wherein the sliding assembly (6) further comprises a plurality of guide posts (63), guide holes corresponding to the guide posts (63) one by one are formed in the fixed plate (1), one end of each guide post (63) is connected to the lifting plate (22), and the other end of each guide post (63) is slidably arranged in each guide hole in a penetrating mode.

10. The universal clamping device according to claim 1, wherein the clamping assembly (4) further comprises a clamping connection plate (43) and a clamping slide block (44), the clamping driving piece (42) is fixedly arranged on the clamping connection plate (43), the clamping connection plate (43) is fixedly arranged on the fixing plate (1), a sliding protrusion is arranged on the clamping driving piece (42), a sliding groove is formed in the clamping slide block (44), the clamping slide block (44) is connected with the output end of the clamping driving piece (42) and slides on the sliding protrusion of the clamping driving piece (42) through the sliding groove, and the clamping jaw (41) is fixedly arranged on the clamping slide block (44).