Center positioning clamp mechanism

Abstract

The utility model provides a center positioning clamp mechanism which comprises a base, a cam disc rotationally arranged on the base and a driven positioning mechanism movably arranged on the base, and the driven positioning mechanism is matched with the cam disc. The base is provided with a driving mechanism used for driving the cam disc to rotate so as to drive the driven positioning mechanism to move. And the driven positioning mechanism and / or the driving mechanism are / is provided with a clamp for clamping a product. The driving mechanism is used as a power source, the power source is matched with the cam disc and the driven positioning mechanisms, and the mechanism can move back and forth in a plurality of directions to perform center positioning through the conduction effect of one cam disc, so that a product in the center is accurately clamped and positioned; and one power source is adopted to drive the whole mechanism, so that more energy is saved, and the functionality is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a center positioning clamp mechanism. Background Art

[0002] At present, screen printing technology has been widely used in the high-precision printing industry. Manufacturers of printing machines are good at printing accuracy, but they cannot control the positioning accuracy of the products that need to be printed. The positioning method of traditional screen printing technology has been difficult to adapt to today's high-precision printed products. In order to pursue higher production performance, in addition to ensuring the appearance and shape accuracy of a single product, it is more important to be able to stably control the printing position accuracy and ensure the repeatability of the product positioning, so as to reduce production costs while ensuring product quality. Due to the differences in the appearance and size of printed products, if the traditional positioning method is used, the two sides of the product are positioned close together. Due to factors such as product shape errors, size errors, and foreign matter on the ink pad, it is difficult to ensure positioning accuracy.

[0003] To this end, this solution proposes a center positioning fixture for use in printing ceramic products. Summary of the invention

[0004] In view of the above technical problems, the utility model proposes a center positioning fixture mechanism, which is used to solve the problem in the prior art that the positioning accuracy of high-precision printed products is difficult to ensure.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A center positioning fixture mechanism comprises a base, a cam plate rotatably arranged on the base and a driven positioning mechanism movably arranged on the base, and the driven positioning mechanism and the cam plate are slidably matched; a driving mechanism for driving the cam plate to rotate to drive the movement of the driven positioning mechanism is provided on the base; and a fixture is provided on the driven positioning mechanism and / or the driving mechanism for clamping the product.

[0007] Furthermore, the driving mechanism includes a telescopic driving member, a driving connecting member connected to the telescopic end of the telescopic driving member, a cam follower is provided on the driving connecting member, an active slide groove slidably matched with the cam follower is provided on the cam plate, and an angle θ1 is formed between the sliding direction of the driven follower and the extension direction of the driven slide groove, and 0 o <θ1<180 o The sliding of the cam follower drives the cam plate to rotate.

[0008] Furthermore, the driving connecting member includes a driving connecting plate and a cam connecting plate connected to form an "L"-shaped structure, one end of the driving connecting plate is connected to the telescopic end of the telescopic driving member, and the other end is connected to the cam connecting plate, the other end of the cam connecting plate is provided with the clamp, and the cam follower is arranged on the cam connecting plate, and an elastic member is provided between the middle part of the "L"-shaped structure and the base so that the driving connecting member drives the clamp to elastically clamp the product.

[0009] Further, the driven positioning mechanism includes a driven connecting member movably connected to the base, the driven connecting member is provided with a driven follower, and the cam plate is provided with a driven slideway slidably matched with the driven follower, and the sliding direction of the driven follower and the extension direction of the driven slideway form an angle θ2, and 0 o <θ2<180 o So that the rotation of the cam plate drives the movement of the follower.

[0010] Furthermore, the driven connecting member includes a driven connecting plate and a driven cam connecting plate connected into an "L"-shaped structure, the driven connecting plate is vertically connected to the driven cam connecting plate, the other end of the driven cam connecting plate is provided with the clamp, and the driven follower is arranged on the driven cam connecting plate, and an elastic member is provided between the middle part of the "L"-shaped structure and the base so that the driven connecting member drives the corresponding clamp to elastically clamp the product.

[0011] Furthermore, matching sliding blocks and linear guide rails are provided between the driven connecting member and / or the driving connecting member and the base.

[0012] Furthermore, there are several driven positioning mechanisms, one of which is a manual control mechanism, which includes a pull ring connecting plate and a driven cam connecting plate connected in an "L" shape. A pull ring is connected to the pull ring connecting plate for pulling the driven cam connecting plate to enable the clamp to release the product.

[0013] Furthermore, it also includes a rotary lifting and positioning mechanism for supporting the product, and the rotary lifting and positioning mechanism is arranged on the cam plate.

[0014] Furthermore, the rotary lifting and positioning mechanism includes a lifting platform and at least two lifting guide columns arranged below the lifting platform. The lifting guide columns pass through the cam plate and slide with the cam plate. The base is provided with an inclined slide groove that slides with the lifting guide columns so that the cam plate rotates while driving the lifting guide columns to slide on the inclined slide groove to produce lifting.

[0015] Furthermore, the cam disc is also provided with a guide sleeve for the lifting guide post to pass through, and the lifting guide post and the guide sleeve are slidably matched.

[0016] Beneficial effects of the utility model:

[0017] 1. The utility model uses a telescopic driving mechanism as a power source, which cooperates with a cam plate and a number of driven positioning mechanisms, and uses a power source to drive the entire mechanism, so that the mechanism can be centrally positioned in four directions, and the product can be accurately clamped and positioned;

[0018] 2. The four clamps of the clamp of the utility model can be adjusted forward and backward, which can realize preliminary positioning before clamping to ensure the consistency of the product;

[0019] 3. The utility model provides an inclined slide groove on the base, and drives the cam plate to rotate through the power source, so that the rotary lifting and positioning mechanism can be raised and lowered, which is convenient for taking and placing products and improves the functionality of the products;

[0020] 4. The utility model is easy to operate when taking and placing products. After completing the required work actions, the fixture will automatically lift the product while releasing the product, making it easy to take and place. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the driving mechanism of the utility model.

[0024] Figure 3 It is a structural schematic diagram of the driven positioning mechanism of the utility model.

[0025] Figure 4 It is a structural schematic diagram of the rotary lifting and positioning mechanism of the utility model.

[0026] Figure 5 It is a structural schematic diagram of the base of the utility model.

[0027] In the figure: 1. base, 101. inclined slide, 2. driving mechanism, 201. cylinder, 202. cylinder fixing block, 203. driving connecting plate, 204. spring fixing part, 205. spring, 206. cam connecting plate, 207. cam follower, 208. positioning clamp, 3. driven positioning mechanism, 301. linear slide, 302. driven connecting plate, 303. manual pull ring, 304. pull ring connecting plate, 305. auxiliary clamp, 306. driven cam connecting plate, 307. driven follower, 4. rotary lifting positioning mechanism, 401. guide sleeve, 402. positioning shaft, 403. bearing, 404. lifting guide column, 405. lifting platform, 5. cam plate, 6. product. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1~Figure 4 As shown, a center positioning fixture mechanism described in Example 1 of the utility model includes a base 1, a cam plate 5 rotatably arranged on the base 1, and a driven positioning mechanism 3 movably arranged on the base 1, and the driven positioning mechanism 3 is slidably matched with the cam plate 5; a driving mechanism 2 for driving the cam plate 5 to rotate is provided on the base 1, and a fixture is provided on the driven positioning mechanism 3 and / or the driving mechanism 2 for clamping the product 6, and the rotation of the cam plate 5 drives the movement of the driven positioning mechanism 3, thereby clamping the product 6. In this embodiment, the driving mechanism is a telescopic driving mechanism. The telescopic driving mechanism and the driven positioning mechanism 3 are arranged around the cam plate 5. And in this embodiment, the telescopic driving mechanism and the driven positioning mechanism 3 are both provided with a fixture at one end close to the cam plate 5 for clamping the product 6 located at the center of the cam plate 5, forming a center positioning fixture mechanism.

[0030] In addition, if Figure 4 As shown, a positioning shaft 402 is provided at the center of the base 1, and the center of the cam plate 5 is rotatably connected to the positioning shaft 402 via a bearing 403. A support mechanism is provided above the positioning shaft 402 for supporting the product 6 located at the center.

[0031] Embodiment 2 is different from Embodiment 1 in that Figure 2As shown, the driving mechanism 2 includes a telescopic driving member and a driving connecting member connected to the telescopic end of the telescopic driving member. The driving connecting member transmits the movement of the telescopic driving member so that the driving connecting member can move linearly on the base 1. The driving connecting member is provided with a cam follower 207, and the cam plate 5 is provided with an active sliding groove that slides with the cam follower 207, and the sliding direction of the cam follower 207 forms an angle θ with the extension direction of the active sliding groove, and 0 o <θ<180 o The sliding of the cam follower 207 drives the cam plate 5 to rotate. In this embodiment, the active slide groove is a linear slide groove, and the center line of the linear slide groove in the length direction is not 90 degrees to the radial direction of the cam plate 5. o and 0 o The cam follower 207 slides following the movement of the driving connection member, and its sliding direction is along the radial direction of the cam plate 5. The cam follower 207 is driven to move linearly by the telescopic driving member, and the cam plate 5 is pushed or pulled to rotate by the active sliding groove that slides with the cam follower 207.

[0032] Embodiment 3 is different from Embodiment 2 in that Figure 2 As shown, the driving connection member includes a driving connection plate 203 and a cam connection plate 206 connected in an "L"-shaped structure. One end of the driving connection plate 203 is connected to the telescopic end of the telescopic driving member, and the other end is connected to the cam connection plate 206. In this embodiment, the telescopic driving member is a cylinder 201. The other end of the cam connection plate 206, that is, the end away from the driving connection plate 203, is provided with the clamp. And the cam follower 207 is arranged on the cam connection plate 206. In this embodiment, the cam follower 207 includes a threaded column penetrated on the cam connection plate 206, and the upper end of the threaded column is connected with a nut after passing through the cam connection plate 206, and the lower end of the threaded column is connected with a sliding block to slide in the active slide groove. And the outer side of the sliding block is cylindrical, and the sliding block rotates to a certain extent while sliding in the active slide groove.

[0033] Furthermore, the driving connecting plate 203 and the cam connecting plate 206 are connected to form an "L"-shaped structure, which not only saves space on the base, but also facilitates the provision of an elastic member between the middle part of the "L"-shaped structure, i.e., the corner, and the base 1 so that the driving connecting member drives the clamp to elastically clamp the product 6. Specifically, an upright spring fixing member 204 is provided on the base 1. In this embodiment, the spring fixing member 204 is provided at the end of the cam connecting plate 206 that is opposite to the clamp, and a spring 205, i.e., the elastic member, is provided between the spring fixing member 204 and the end of the cam connecting plate 206. In this embodiment, the clamp is a positioning jaw 208, such as Figure 2As shown. The cylinder 201 provides power to the entire mechanism. When the cylinder 201 is in a retracted state, under the elastic force of the spring 205, the drive connecting plate 203 and the cam connecting plate 206 make the positioning clamp 208 in an extended state, and the entire mechanism is in a clamped state. When the cylinder 201 extends, the cylinder 201 drives the drive connecting plate 203 through the cam connecting plate 206 to open the positioning clamp 208.

[0034] In addition, if Figure 2 As shown, matching sliders and linear guide rails 301 are provided between the driving connecting plate 203 and the base 1 .

[0035] Embodiment 4 is different from Embodiment 3 in that Figure 2 As shown, the driven positioning mechanism 3 includes a driven connecting member movably connected to the base 1, a driven follower 307 is provided on the driven connecting member, and a driven slideway slidably matched with the driven follower 307 is provided on the cam plate 5, and the sliding direction of the driven follower 307 and the extension direction of the driven slideway form an angle θ2, and 0 o <θ2<180 o The cam plate 5 is rotated by the sliding of the cam follower 207, and then the rotation of the cam plate 5 drives the movement of the driven follower 307, thereby driving the movement of the driven connecting member. In this embodiment, the structures of the driven slide groove and the active slide groove are consistent, and the driven slide groove and the active slide groove are arranged on the base 1 in rotational symmetry with the rotation axis of the cam plate 5. The linear movement of the driving connecting member causes the driven connecting member to produce a linear movement through the rotation of the cam plate 5, so that the clamp on the driven positioning mechanism 3 moves. In addition, in this embodiment, the driven follower 307 slides following the movement of the driven connecting member, and its sliding direction is along the radial direction of the cam plate 5.

[0036] Embodiment 5 is different from Embodiment 4 in that Figure 3 As shown, the driven connecting member includes a driven connecting plate 302 and a driven cam connecting plate 306 connected in an "L" shape. The end of the driven connecting plate 302 is vertically connected to the end of the driven cam connecting plate 306. The other end of the driven cam connecting plate 306 is provided with the clamp, and the driven follower 307 is provided on the driven cam connecting plate 306. In this embodiment, the clamp is an auxiliary clamp 305, such as Figure 2As shown. The driven connecting plate 302 and the driven cam connecting plate 306 are connected to form an "L"-shaped structure, which not only saves space on the base, but also facilitates the provision of an elastic member between the middle of the "L"-shaped structure, i.e., the right angle, and the outside and the base 1 so that the driven connecting member drives the corresponding clamp, i.e., the auxiliary clamp 305, to elastically clamp the product 6. Specifically, the spring fixing member 204 is provided on the base 1 at a position directly opposite to the end of the driven cam connecting plate 306 away from the auxiliary clamp 305, and the spring 205, i.e., the elastic member, is provided between the spring fixing member 204 and the end of the driven cam connecting plate 306.

[0037] In this embodiment, the structure of the driven follower 307 is the same as that of the cam follower 207; the structure of the driven cam connecting plate 306 is also the same as that of the cam connecting plate 206. In other embodiments, the structure of the driven follower 307 is different from that of the cam follower 207. In addition, a matching slider and linear guide rail 301 are also provided between the driven connecting plate 302 and the base 1.

[0038] Embodiment 6 is different from Embodiment 5 in that Figure 3 As shown, the driven positioning mechanism 3 is provided with several. In this embodiment, there are three driven positioning mechanisms 3, and the three driven positioning mechanisms 3 and one driving mechanism 2 are arranged in four directions with the supporting mechanism as the center, so as to facilitate clamping the product 6 placed on the supporting mechanism. Correspondingly, four linear slide grooves are arranged at equal angles on the cam plate 5, which are active slide grooves corresponding to the driving mechanism and driven slide grooves corresponding to the three driven positioning mechanisms 3.

[0039] Furthermore, one of the driven positioning mechanisms 3 facing the driving mechanism 2 is set as a manual control mechanism. Specifically, the manual control mechanism includes a pull ring connecting plate 304 and a driven cam connecting plate 306 connected in an "L"-shaped structure, and a driven follower 307 that slides with the cam disc 5 is also provided on the driven cam connecting plate 306. A clamp is also provided at one end of the driven cam connecting plate 306 away from the pull ring connecting plate 304. The spring fixing member 204 is also provided at the end of the driven cam connecting plate 306 away from the clamp on the base 1, and a spring 205, i.e., the elastic member, is provided between the spring fixing member 204 and the end of the driven cam connecting plate 306. In addition, in this embodiment, the structure of the clamp is consistent with that of the positioning jaw 208 and the auxiliary jaw 305; a matching slider and a linear slide rail 301 are also provided between the pull ring connecting plate 304 and the base 1; and the pull ring connecting plate 304 is consistent with the structure of the driving connecting plate 203. A pull ring 303 is connected to the side of the pull ring connecting plate 304 away from the clamp for pulling the driven cam connecting plate 306, thereby driving the rotation of the cam plate 5, so that each clamp moves backward to release the product 6, thereby achieving the purpose of manual control.

[0040] In addition, the connection between the clamp and the cam connecting plate 206 or the driven cam connecting plate 306 is a detachable connection. Specifically, an oblong hole is provided on the clamp, and a screw or bolt passes through the oblong hole and the cam connecting plate 206 or the driven cam connecting plate 306 for connection. The oblong hole allows the position of the clamp to be adjusted forward and backward.

[0041] Embodiment 7 is different from Embodiment 1 in that Figure 4 As shown, it also includes a rotary lifting and positioning mechanism 4 for supporting the product 6, namely the supporting mechanism. The rotary lifting and positioning mechanism 4 is arranged on the cam plate 5, and the rotary lifting and positioning mechanism 4 cooperates with the base 1.

[0042] Furthermore, if Figure 4 As shown, the rotary lifting and positioning mechanism 4 includes a lifting platform 405 and at least two lifting guide pillars 404 arranged below the lifting platform 405. In this embodiment, four lifting guide pillars 404 are arranged below the four sides of the lifting platform 405. The lifting guide pillars 404 pass through the cam plate 5 and slide with the cam plate 5 to be lifted up and down. Figure 5 As shown, the base 1 is provided with an inclined slide groove 101 that is slidably matched with the lifting guide pillar 404, that is, the base 1 is provided with slide grooves corresponding to the four lifting guide pillars 404, and the bottom of the slide groove is a slope. The lower end of the lifting guide pillar 404 is spherical and tangent to the bottom of the slope of the slide groove, so that the cam plate 5 rotates and drives the lifting guide pillar 404 to slide on the bottom of the inclined slide groove 101, and the lifting and lowering is generated due to the effect of the slope, thereby driving the lifting platform 405 and the product 6 thereon to lift and lower, so as to facilitate the placement of the product 6. In this embodiment, the cam plate 5 rotates clockwise to drive the lifting guide pillar 404 to move upward in the inclined slide groove 101 of the base 1, and the entire mechanism is in an ascending and opening state; the cam plate 5 rotates counterclockwise to drive the lifting guide pillar 404 to move downward in the inclined slide groove 101 of the base 1, and the entire mechanism is in a descending and clamping state.

[0043] Furthermore, if Figure 4 As shown, the cam plate 5 is also provided with a guide sleeve 401 for the lifting guide post 404 to pass through, and the lifting guide post 404 and the guide sleeve 401 are slidably matched.

[0044] The working process of the utility model is as follows:

[0045] The center positioning fixture mechanism of the utility model mainly uses a cylinder 201 to complete the positioning and clamping action. The default position of the center positioning fixture mechanism is in a clamping state, the cylinder 201 is in a retracted state, the elastic force of the spring 205 pushes the cam plate 5 to rotate counterclockwise, and the counterclockwise rotation of the cam plate 5 drives the cam follower 207 and the lifting guide column 404 to work in conjunction; at the same time, when the lifting guide column 404 makes a circular motion, the inclined slide groove 101 on the base 1 causes the lifting guide column 404 to descend, and the lifting guide column 404 and the lifting platform 405 are relatively fixed, and the lifting platform 405 is driven to descend accordingly; the cam follower 207 and the slider matched with the linear slide rail 301 are relatively fixed in position, and under the guidance of the linear slide rail 301, the auxiliary clamp 305 and the positioning clamp 208 will move toward the center to perform the descending positioning clamping of the product 6 in four directions.

[0046] When the cylinder 201 is ventilated, the cylinder 201 extends and drives the linear slide 301 to move, the spring 205 is compressed, and the cam plate 5 rotates clockwise. The clockwise rotation of the cam plate 5 drives the cam follower 207 to move in conjunction. Since the cam follower 207 and the linear slide 301 are relatively fixed, under the guidance of the linear slide 301, the auxiliary clamp 305 and the positioning clamp 208 move backward; at the same time, when the lifting guide column 404 is making a circular motion, the slope slide groove on the base 1 will cause the lifting guide column 404 to rise, and the lifting guide column 404 and the lifting platform 405 are relatively fixed, thereby driving the lifting platform 405 to rise; finally, the lifting platform 405 lifts the product 6 to facilitate the removal of the product 6.

[0047] In addition, the manual pull ring 303 is used as a manual backup, and can be positioned manually when there is no air source power. When the manual pull ring 303 is pulled open, the spring 205 is compressed, and the pull ring connecting plate 304, the driven cam connecting plate 306, and the clamp move backward on the linear slide rail 301; the cam follower 207 moves in the track of the cam disc 5, causing the cam disc 5 to rotate clockwise, and the entire clamping mechanism is in an open state.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that any modification to the technical solutions described in the aforementioned embodiments, or any equivalent replacement of some or all of the technical features therein, within the spirit and principles of the present invention, and such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A center positioning fixture mechanism, characterized in that: The invention comprises a base (1), a cam plate (5) rotatably arranged on the base (1), and a driven positioning mechanism (3) movably arranged on the base (1), wherein the driven positioning mechanism (3) and the cam plate (5) are slidably matched; a driving mechanism (2) is provided on the base (1) for driving the cam plate (5) to rotate so as to drive the driven positioning mechanism (3) to move; and a clamp is provided on the driven positioning mechanism (3) and / or the driving mechanism (2) for clamping a product (6).

2. The center positioning fixture mechanism according to claim 1, characterized in that: The driving mechanism (2) comprises a telescopic driving member, a driving connecting member connected to the telescopic end of the telescopic driving member, a cam follower (207) being provided on the driving connecting member, an active sliding groove being slidably matched with the cam follower (207) being provided on the cam plate (5), and an included angle θ1 is formed between the sliding direction of the cam follower (207) and the extension direction of the active sliding groove, and 0 o <θ1<180 o The sliding movement of the cam follower (207) drives the cam plate (5) to rotate.

3. The center positioning fixture mechanism according to claim 2, characterized in that: The driving connection member comprises a driving connection plate (203) and a cam connection plate (206) connected to form an "L"-shaped structure, one end of the driving connection plate (203) being connected to the telescopic end of the telescopic driving member, and the other end being connected to the cam connection plate (206), the other end of the cam connection plate (206) being provided with the clamp, and the cam follower (207) being arranged on the cam connection plate (206), and an elastic member being arranged between the middle part of the "L"-shaped structure and the base (1) so that the driving connection member drives the clamp to elastically clamp the product (6).

4. The center positioning fixture mechanism according to claim 2 or 3, characterized in that: The driven positioning mechanism (3) comprises a driven connecting member movably connected to the base (1), the driven connecting member being provided with a driven follower (307), and the cam plate (5) being provided with a driven slide groove slidably matched with the driven follower (307), and the sliding direction of the driven follower (307) and the extension direction of the driven slide groove forming an angle θ2, and 0 o <θ2<180 o The rotation of the cam plate (5) drives the movement of the driven follower (307).

5. The center positioning fixture mechanism according to claim 4, characterized in that: The driven connecting member comprises a driven connecting plate (302) and a driven cam connecting plate (306) connected to form an "L"-shaped structure. The driven connecting plate (302) is vertically connected to the driven cam connecting plate (306). The other end of the driven cam connecting plate (306) is provided with the clamp, and the driven follower (307) is arranged on the driven cam connecting plate (306). An elastic member is provided between the middle part of the "L"-shaped structure and the base (1) so that the driven connecting member drives the corresponding clamp to elastically clamp the product (6).

6. The center positioning fixture mechanism according to claim 4, characterized in that: Matching sliding blocks and linear slide rails (301) are provided between the driven connecting member and / or the driving connecting member and the base (1).

7. The center positioning fixture mechanism according to claim 5 or 6, characterized in that: The driven positioning mechanisms (3) are provided in plurality, one of which is a manually controlled mechanism. The manually controlled mechanism comprises a pull ring connecting plate (304) and a driven cam connecting plate (306) connected in an "L"-shaped structure. A pull ring (303) is connected to the pull ring connecting plate (304) for pulling the driven cam connecting plate (306) so that the clamp releases the product (6).

8. The center positioning fixture mechanism according to any one of claims 1 to 3 or 5 or 6, characterized in that: It also includes a rotary lifting and positioning mechanism (4) for supporting the product (6), wherein the rotary lifting and positioning mechanism (4) is arranged on the cam plate (5).

9. The center positioning fixture mechanism according to claim 8, characterized in that: The rotary lifting and positioning mechanism (4) comprises a lifting platform (405) and at least two lifting guide pillars (404) arranged below the lifting platform (405); the lifting guide pillars (404) pass through the cam plate (5) and are slidably matched with the cam plate (5); and the base (1) is provided with an inclined sliding groove (101) slidably matched with the lifting guide pillars (404) so ​​that the cam plate (5) rotates while driving the lifting guide pillars (404) to slide on the inclined sliding groove (101) to generate lifting.

10. The center positioning fixture mechanism according to claim 9, characterized in that: The cam plate (5) is also provided with a guide sleeve (401) for the lifting guide post (404) to pass through, and the lifting guide post (404) and the guide sleeve (401) are slidably matched.

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