Pressing machine convenient for mounting mold

Abstract

The utility model provides a pressing machine convenient for installing a mold, which belongs to the technical field of pressing machine equipment and comprises a pressing machine body, a sliding module, a limiting column, an upper mold locking mechanism, a lower mold locking mechanism and a mold pressing mechanism, the upper mold locking mechanism is used for installing an upper mold on the mold pressing mechanism, and the lower mold locking mechanism is used for installing a lower mold on the mold pressing mechanism. The sliding module slides the borne lower mold to the limiting column for preliminary limiting, at the moment, the lower mold enters the press body, the lower mold locking mechanism assists in fixing the lower mold entering the press body, and therefore the installation work of the upper mold and the lower mold in the press body is completed. And finally, the die pressing mechanism pushes the upper die to carry out pressing and edge covering work on the installed lower die.

Description

Technical Field

[0001] The utility model belongs to the technical field of press equipment, and particularly relates to a press facilitating die installation. Background Art

[0002] A press is a forming machine used to form industrial products by pressure. When a die requiring press fitting and hemming is working, a crane is needed to place the die into the press. During the placement process, workers need to cooperate with the crane to fixedly install the die at a designated position inside the press, and finally the press performs press fitting and hemming on it.

[0003] The Chinese utility model patent with the publication number of "CN203126001U" discloses "an installation device for an upper die on a hydraulic press". When this utility model is in use, the upper die is placed on a trolley, the trolley is lifted by a gantry crane, the trolley is extended into the hydraulic press, and then the trolley is pushed to adjust the position of the upper die, and the upper die is fixed on the lower pressing platform to complete the installation process of the upper die.

[0004] However, its disadvantage is that after the trolley is extended into the hydraulic press, the position of the upper die can only be adjusted by the movement of the trolley. In actual work, relative movement will occur between the upper die and the trolley during their combined movement. The upper die after moving to the designated position has an error due to the relative movement with the trolley, resulting in the upper die not being at the predetermined position, and subsequent fine adjustment of the position of the upper die is required. Since the upper die and the trolley are in surface contact, the adjustment is not only troublesome but also increases the work intensity of the workers. Content of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a press facilitating die installation, which is used to solve the problem of difficult operation in die installation of existing presses.

[0006] To achieve the above purpose and other related purposes, the present utility model provides a press facilitating die installation, and the press includes:

[0007] A press body, which is hollow inside, and an opening is provided on a side wall of the press body;

[0008] A sliding module, which includes balls and a support plate;

[0009] The number of the balls is several, each ball rotates around its center, the several balls are at least divided into two groups, the several balls are located on the same horizontal plane, the several balls are arranged in sequence along the center line direction of the opening, and the balls receive the lower die entering the press body;

[0010] The ball bearings are arranged on the support plate, and the support plate is installed inside the press body.

[0011] As an alternative, the press further includes a first telescopic power source for pushing the sliding module to move up and down;

[0012] The fixed end of the first telescopic power source is fixedly connected to the press body, and the power end of the first telescopic power source is fixedly connected to the support plate.

[0013] As an alternative, the press further includes an installation table for placing the lower die and a limiting post for limiting the lower die entering the press body;

[0014] The installation table is installed inside the press body, the limiting post is installed on the installation table, and the upper end surface of the limiting post is higher than the upper end surface of the installation table;

[0015] The limiting post is located on the side of the sliding module away from the opening.

[0016] As an alternative, the lowest position of the ball bearing movement is lower than the upper end surface of the installation table, and the highest position of the ball bearing movement is lower than the upper end surface of the limiting post.

[0017] As an alternative, the press further includes a die pressing mechanism, and the die pressing mechanism includes an upper die mounting plate;

[0018] The upper die mounting plate is slidably arranged inside the press body, and the lower die installed on the installation table is within the pressing stroke of the upper die mounting plate.

[0019] As an alternative, the die pressing mechanism further includes a fourth telescopic power source;

[0020] The extending end of the fourth telescopic power source is fixedly connected to the upper die mounting plate, the fixed end of the fourth telescopic power source is fixedly connected to the press body, and the telescopic direction of the fourth telescopic power source is consistent with the pressing stroke of the upper die mounting plate.

[0021] As an alternative, the press further includes an upper die locking mechanism installed on the upper die mounting plate and a lower die locking mechanism installed on the installation table. The upper die locking mechanism includes a second telescopic power source and a first push block, and the lower die locking mechanism includes a third telescopic power source and a second push block;

[0022] The second telescopic power sources are located on both sides of the upper die mounting plate, the extending ends of the second telescopic power sources on both sides are arranged oppositely, the extending ends of the second telescopic power sources are fixedly connected with the first push blocks, a first guiding inclined surface is formed on the first push blocks, and the first push blocks fix the upper die installed on the upper die mounting plate;

[0023] The third telescopic power source is located on both sides of the sliding module. The extending ends of the third telescopic power sources on both sides are arranged oppositely. A second pushing block is fixedly connected to the extending end of the third telescopic power source. A second guiding inclined surface is provided on the second pushing block. The second pushing block fixes the lower mold installed on the installation table.

[0024] As an alternative, the upper mold clamping mechanism further includes a first mounting block, a first waist-shaped hole and a first screw;

[0025] The first mounting block is fixedly connected to the fixed end of the second telescopic power source. A first waist-shaped hole is provided on the first mounting block. The first waist-shaped hole is arranged on both sides of the second telescopic power source fixedly connected to the first mounting block. Corresponding first threaded holes are provided on the upper and lower end faces of the upper mold mounting plate. The first screw passes through the first waist-shaped hole and then turns into the first threaded hole. The first screw fixes the first mounting block to the lower end face of the upper mold mounting plate correspondingly. The moving direction of the first waist-shaped hole is arranged parallel to the telescopic direction of the second telescopic power source.

[0026] As an alternative, the lower mold clamping mechanism further includes a second mounting block, a second waist-shaped hole and a second screw;

[0027] The second mounting block is fixedly connected to the fixed end of the third telescopic power source. A second waist-shaped hole is provided on the second mounting block. The second waist-shaped hole is arranged on both sides of the second telescopic power source fixedly connected to the second mounting block. Corresponding second threaded holes are provided on the upper end face of the installation table. The second screw passes through the second waist-shaped hole and then turns into the second threaded hole. The second screw fixes the second mounting block to the upper end face of the installation table correspondingly. The moving direction of the second waist-shaped hole is arranged parallel to the telescopic direction of the third telescopic power source.

[0028] As described above, a press for facilitating the placement of a mold according to the present invention has at least the following beneficial effects:

[0029] 1. After the lower mold of the present invention is placed in the sliding module, its position is adjusted by moving on the balls. When adjusting, only the lower mold needs to be adjusted. Since there are multiple points of contact between the lower mold and the balls, the adjustment of the position of the lower mold is relatively easy, which helps to reduce the working intensity of the staff and improve work efficiency.

[0030] 2. The present invention can automatically limit the position where the lower mold is pushed into the press through the setting of the limit posts, thereby realizing the positioning of the lower mold with the limit posts. The structural design is reasonable and the front-back cooperation degree is high.

[0031] 3. The present invention is in point contact with the balls on the sliding module when the lower mold is installed, which facilitates the rapid positioning of the lower mold. After the lower mold is installed, the sliding module moves downward so that the lower mold contacts the installation table surface to ensure the stability of the lower mold during press-fitting and edge wrapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It shows a three - dimensional structure schematic diagram of the present utility model;

[0033] Figure 2 It shows a structure schematic diagram of the first telescopic power source and the sliding module of the present utility model;

[0034] Figure 3 It shows a partial exploded view of the upper die - locking mechanism of the present utility model;

[0035] Figure 4 It shows a partial exploded view of the lower die - locking mechanism of the present utility model.

[0036] In the figure: 101, press body; 102, opening;

[0037] 201, support plate; 202, ball;

[0038] 301, limit post; 302, mounting table;

[0039] 401, first telescopic power source;

[0040] 501, second telescopic power source; 502, first push block; 503, third telescopic power source; 504, second push block; 505, first guiding inclined surface; 506, second guiding inclined surface; 507, first mounting block; 508, first kidney - shaped hole; 509, first screw; 510, first threaded hole; 511, second mounting block; 512, second kidney - shaped hole; 513, second screw; 514, second threaded hole;

[0041] 601, upper die mounting plate; 602, fourth telescopic power source. DETAILED DESCRIPTION OF THE INVENTION

[0042] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0043] Please refer to Figures 1 to 4It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the efficacy that the present utility model can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the implementation scope of the present utility model. The change or adjustment of their relative relationship, without substantial change of the technical content, should also be regarded as the implementation scope of the present utility model.

[0044] The following various embodiments are only for illustration. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment.

[0045] Please refer to Figure 1 and Figure 2 , the present utility model provides a press for facilitating the installation of a mold, and the press includes:

[0046] A press body 101, the interior of the press body 101 is hollowly arranged, and an opening 102 is formed on the side wall of one side of the press body 101;

[0047] A sliding module, the sliding module includes balls 202 and a support plate 201;

[0048] The number of the balls 202 is several, each ball 202 rotates around its center, several balls 202 are at least divided into two groups, several balls 202 are located on the same horizontal plane, several balls 202 are arranged in an array along the center line direction of the opening 102, and the balls 202 receive the lower mold entering the press body 101;

[0049] The balls 202 are rotatably arranged on the support plate 201, and the support plate 201 is installed in the press body 101.

[0050] In this embodiment, before starting work, it is necessary to place the lower mold into the press body 101 for positioning. Specifically, the lower mold is first placed on the sliding module, and then the lower mold is pushed to slide in the press body 101 along with the balls 202 on the sliding module, so as to move the lower mold to the specified position and wait for subsequent operations. The lower mold of the present utility model adjusts its position by moving on the balls 202 after being placed on the sliding module, and only the lower mold is adjusted during the adjustment, which is convenient for the quick and accurate positioning of the lower mold, reduces the working intensity of the staff, and improves the working efficiency.

[0051] Please refer to Figure 1 and Figure 2 , the press further includes a first telescopic power source 401 for pushing the sliding module to move up and down;

[0052] The first telescopic power source 401 is not limited here. Its function is to provide telescopic power, which can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.;

[0053] The fixed end of the first telescopic power source 401 is fixedly connected to the press body 101, and the power end of the first telescopic power source 401 is fixedly connected to the support plate 201.

[0054] In this embodiment, before the lower die is placed on the sliding module, the first telescopic power source 401 extends and retracts the sliding module so that the top of the ball 202 is lower than the upper end surface of the limit post 301 and higher than the upper end surface of the mounting table 302, and then the lower die is placed on the sliding module and waits for subsequent operations. When the present utility model installs the lower die, only the height of the sliding module needs to be adjusted to receive and place the lower die, so that the press can slide and adjust the position of the lower die through the ball 202.

[0055] Please refer to Figure 1 and Figure 2 , the press further includes a mounting table 302 for placing the lower die and a limit post 301 for limiting the lower die entering the press body 101;

[0056] The mounting table 302 is installed in the press body 101, the limit post 301 is installed on the mounting table 302, and the upper end surface of the limit post 301 is higher than the upper end surface of the mounting table 302;

[0057] There are at least two limit posts 301, and they are located on both sides of the sliding module. Each limit post 301 is in the same plane;

[0058] The limit post 301 is located on the side of the sliding module away from the opening 102.

[0059] In this embodiment, after the lower die is placed on the sliding module, continue to push the lower die to slide on the ball 202 of the sliding module until it stops when the lower die contacts the limit post 301, that is, the front-back positioning of the lower die is realized. Through the setting of the limit post 301, the present utility model can automatically limit the position of the lower die pushed into the press, so as to realize the automatic front-back positioning of the lower die through the limit post 301. The structural design is reasonable and the front-back coordination is high.

[0060] Please refer to Figure 1 and Figure 2, the lowest position where the ball 202 moves is lower than the upper end surface of the mounting table 302, and the highest position where the ball 202 moves is lower than the upper end surface of the limit post 301.

[0061] In this embodiment, the first telescopic power source 401 extends and retracts the sliding module so that the top of the ball 202 is lower than the upper end surface of the limit post 301 and higher than the upper end surface of the mounting table 302. When the lower mold is installed on the sliding module, after the lower mold is pushed to contact the limit post 301 and adjusted to the specified position, it stops. Then, the first telescopic power source 401 extends and retracts the sliding module so that the top of the ball 202 is lower than the lower end surface of the mounting table 302, enabling the lower mold to be placed on the mounting table 302 and waiting for subsequent operations. In the present utility model, since the upper end surface of the limit post 301 is always higher than the ball 202 on the sliding module, the lower end surface of the lower mold placed on the sliding module is always lower than the upper end surface of the limit post 301. That is, no matter how high the ball 202 moves under the extension and retraction of the first telescopic power source 401, it can ensure the limitation of the lower mold by the limit post 301. Moreover, after the position of the lower mold is adjusted, the point contact of the ball 202 can be adjusted to the surface contact of the mounting table 302 to ensure the stability when the lower mold is pressed and edge-bonded.

[0062] Please refer to Figure 1 , Figure 3 and Figure 4 , the press further includes a die pressing mechanism, and the die pressing mechanism includes an upper die mounting plate 601;

[0063] The upper die mounting plate 601 is slidably arranged in the press body 101, and the lower mold installed on the mounting table 302 is within the pressing stroke of the upper die mounting plate 601.

[0064] In this embodiment, after the lower mold is correctly installed in the press and limited and fixed, the upper die mounting plate 601 presses and edge-bonds the installed lower mold, thus completing the pressing and edge-bonding work. The present utility model can automatically perform pressing and edge-bonding on the installed lower mold through the upper die mounting plate 601, with a high degree of automation.

[0065] Please refer to Figure 1 and Figure 2 , the die pressing mechanism further includes a fourth telescopic power source 602;

[0066] Here, the fourth telescopic power source 602 is not limited. Its function is to provide telescopic power and can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.;

[0067] The extending end of the fourth telescopic power source 602 is fixedly connected to the upper die mounting plate 601, the fixed end of the fourth telescopic power source 602 is fixedly connected to the press body 101, and the telescopic direction of the fourth telescopic power source 602 is consistent with the pressing stroke of the upper die mounting plate 601.

[0068] In this embodiment, after the lower die is correctly installed and limited and fixed in the press, the fourth telescopic power source 602 extends and retracts, and through the upper die mounting plate 601, it performs pressing and hemming on the correctly installed lower die within the sliding stroke. In the pressing stroke of the upper die mounting plate 601 of the present utility model for the installed lower die, the upper die mounting plate 601 can perform pressing and hemming on the installed lower die under the extension and retraction of the fourth telescopic power source 602 to ensure that the overall working process can be completed.

[0069] Please refer to Figure 1 , Figure 3 and Figure 4 , the press further includes an upper die locking mechanism installed on the upper die mounting plate 601 and a lower die locking mechanism installed on the mounting table 302. The upper die locking mechanism includes a second telescopic power source 501 and a first push block 502. The lower die locking mechanism includes a third telescopic power source 503 and a second push block 504;

[0070] Here, the second telescopic power source 501 and the third telescopic power source 503 are not limited. Their function is to provide telescopic power, which can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.;

[0071] The second telescopic power source 501 is located on both sides of the upper die mounting plate 601. The extending ends of the second telescopic power sources 501 on both sides are arranged oppositely. The extending end of the second telescopic power source 501 is fixedly connected with a first push block 502. A first guiding inclined surface 505 is formed on the first push block 502. The first push block 502 fixes the upper die installed on the upper die mounting plate 601;

[0072] The third telescopic power source 503 is located on both sides of the sliding module. The extending ends of the third telescopic power sources 503 on both sides are arranged oppositely. The extending end of the third telescopic power source 503 is fixedly connected with a second push block 504. A second guiding inclined surface 506 is formed on the second push block 504. The second push block 504 fixes the lower die installed on the mounting table 302.

[0073] In this embodiment, after the upper die is adjusted and placed at the corresponding position on the upper die mounting plate 601, the second telescopic power sources 501 on both sides extend, and accurately and quickly insert into the upper die through the first guiding inclined surfaces 505 on the first pushing blocks 502, that is, the upper die is completely fixed at the corresponding mounting position; then after the lower die is adjusted and placed at the corresponding position on the mounting table 302, the third telescopic power sources 503 on both sides extend, and accurately and quickly insert into the lower die through the second guiding inclined surfaces 506 on the second pushing blocks 504, that is, the lower die is completely fixed at the corresponding mounting position, and then the upper die mounting plate 601 drives the upper die to press and edge-wrap the lower die mounted on the mounting table 302. The utility model can automatically fix the upper die and the lower die immediately when their positions are adjusted, with a high degree of automation.

[0074] Please refer to Figure 1 and Figure 3 , the upper die-locking mechanism further includes a first mounting block 507, a first kidney-shaped hole 508 and a first screw 509;

[0075] The first mounting block 507 is fixedly connected to the fixed end of the second telescopic power source 501. A first kidney-shaped hole 508 is formed in the first mounting block 507. The first kidney-shaped hole 508 is arranged on both sides of the second telescopic power source 501 fixedly connected to the first mounting block 507. Corresponding first threaded holes 510 are formed in the upper and lower end faces of the upper die mounting plate 601. The first screw 509 passes through the first kidney-shaped hole 508 and then turns into the first threaded hole 510. The first screw 509 fixedly connects the first mounting block 507 to the lower end face of the upper die mounting plate 601. The moving direction of the first kidney-shaped hole 508 is parallel to the telescopic direction of the second telescopic power source 501.

[0076] In this embodiment, when it is necessary to adjust the telescopic stroke of the first pushing block 502 according to the position of the upper die, the first screw 509 can be loosened from the first threaded hole 510, and then the first mounting block 507 is moved to slide in the first kidney-shaped hole 508 along the telescopic direction of the second telescopic power source 501. After sliding to the specified position, the first screw 509 is tightened in the first threaded hole 510 to fix the first mounting block 507. The utility model can adjust the telescopic stroke of the first pushing block 502, so as to install and fix upper dies with different widths.

[0077] Please refer to Figure 1 and Figure 4 , the lower die-locking mechanism further includes a second mounting block 511, a second kidney-shaped hole 512 and a second screw 513;

[0078] The second mounting block 511 is fixedly connected to the fixed end of the third telescopic power source 503. A second kidney-shaped hole 512 is formed in the second mounting block 511. The second kidney-shaped hole 512 is arranged on both sides of the second telescopic power source 501 fixedly connected to the second mounting block 511. Corresponding second threaded holes 514 are formed in the upper end surface of the mounting table 302. The second screw 513 passes through the second kidney-shaped hole 512 and then turns into the second threaded hole 514. The second screw 513 fixes the second mounting block 511 correspondingly on the upper end surface of the mounting table 302. The moving direction of the second kidney-shaped hole 512 is arranged parallel to the telescopic direction of the third telescopic power source 503.

[0079] In this embodiment, when it is necessary to adjust the telescopic stroke of the second push block 504 according to the position of the lower mold, the second screw 513 can be loosened from the second threaded hole 514, and then the second mounting block 511 is moved to slide in the second kidney-shaped hole 512 along the telescopic direction of the third telescopic power source 503. After sliding to the designated position, the second screw 513 is tightened into the second threaded hole 514 to fix the second mounting block 511. The utility model can adjust the telescopic stroke of the second push block 504, so that the lower molds with different widths can be installed and fixed.

[0080] The above embodiments only illustrate the principle and its effects of the utility model, rather than limiting the utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A press for facilitating the installation of a mold, characterized in that, The press includes: A press body, which is hollow inside, and an opening is formed in the side wall on one side of the press body; A sliding module, which includes balls and a support plate; The number of the balls is several, each ball rotates around its center, the several balls are at least divided into two groups, the several balls are located on the same horizontal plane, the several balls are arranged in sequence along the center line direction of the opening, and the balls receive the lower die entering the press body; The balls are rotatably arranged on the support plate, and the support plate is installed in the press body.

2. The press for facilitating the installation of a mold according to claim 1, characterized in that: The press further includes a first telescopic power source for pushing the sliding module to move up and down; The fixed end of the first telescopic power source is fixedly connected to the press body, and the power end of the first telescopic power source is fixedly connected to the support plate.

3. A press for facilitating the installation of a mold according to claim 1, characterized in that: The press further includes a mounting table for placing the lower die and a limiting column for limiting the lower die entering the press body; The mounting table is installed in the press body, the limiting column is installed on the mounting table, and the upper end surface of the limiting column is higher than the upper end surface of the mounting table; The limiting column is located on the side of the sliding module away from the opening.

4. The press for facilitating the installation of a mold according to claim 3, characterized in that: The lowest position where the balls move is lower than the upper end surface of the mounting table, and the highest position where the balls move is lower than the upper end surface of the limiting column.

5. The press for facilitating the installation of a mold according to claim 3, wherein: The press further includes a die pressing mechanism, which includes an upper die mounting plate; The upper die mounting plate is slidably arranged in the press body, and the lower die installed on the mounting table is within the pressing stroke of the upper die mounting plate.

6. The press for facilitating the installation of a mold according to claim 5, characterized in that: The die pressing mechanism further includes a fourth telescopic power source; The extending end of the fourth telescopic power source is fixedly connected to the upper die mounting plate, the fixed end of the fourth telescopic power source is fixedly connected to the press body, and the telescopic direction of the fourth telescopic power source is consistent with the pressing stroke of the upper die mounting plate.

7. A press for facilitating the installation of a mold according to claim 5, characterized in that: The press further includes an upper die locking mechanism installed on the upper die mounting plate and a lower die locking mechanism installed on the mounting table. The upper die locking mechanism includes a second telescopic power source and a first push block, and the lower die locking mechanism includes a third telescopic power source and a second push block; The second telescopic power sources are located on both sides of the upper die mounting plate, the extending ends of the second telescopic power sources on both sides are arranged oppositely, the extending ends of the second telescopic power sources are fixedly connected with the first push block, a first guiding inclined surface is formed on the first push block, and the first push block fixes the upper die installed on the upper die mounting plate; The third telescopic power sources are located on both sides of the sliding module, the extending ends of the third telescopic power sources on both sides are arranged oppositely, the extending ends of the third telescopic power sources are fixedly connected with the second push block, a second guiding inclined surface is formed on the second push block, and the second push block fixes the lower die installed on the mounting table.

8. A press for facilitating the installation of a mold according to claim 7, characterized in that: The upper die locking mechanism further includes a first mounting block, a first kidney-shaped hole and a first screw; The first mounting block is fixedly connected to the fixed end of the second telescopic power source. A first kidney-shaped hole is formed in the first mounting block, and the first kidney-shaped hole is arranged on both sides of the second telescopic power source fixedly connected to the first mounting block. Corresponding first threaded holes are formed in the upper and lower end faces of the upper die mounting plate. After the first screw passes through the first kidney-shaped hole, it is screwed into the first threaded hole. The first screw fixedly connects the first mounting block to the lower end face of the upper die mounting plate correspondingly, and the moving direction of the first kidney-shaped hole is arranged parallel to the telescopic direction of the second telescopic power source.

9. The press for facilitating the installation of a mold according to claim 7, characterized in that: The lower die locking mechanism further includes a second mounting block, a second kidney-shaped hole and a second screw; The second mounting block is fixedly connected to the fixed end of the third telescopic power source. A second kidney-shaped hole is formed in the second mounting block, and the second kidney-shaped hole is arranged on both sides of the third telescopic power source fixedly connected to the second mounting block. Corresponding second threaded holes are formed in the upper end face of the mounting table. After the second screw passes through the second kidney-shaped hole, it is screwed into the second threaded hole. The second screw fixedly connects the second mounting block to the upper end face of the mounting table correspondingly, and the moving direction of the second kidney-shaped hole is arranged parallel to the telescopic direction of the third telescopic power source.

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