Reinforcing structure of combined cutting die

By designing a reinforced installation mechanism, the problem of loosening and falling off of the bolts of the combined die reinforcement seat during installation is solved, stable clamping and rapid positioning are achieved, and the fixation and installation convenience are improved.

CN223339620UActive Publication Date: 2025-09-16KUNSHAN MINGLIHONG PRECISION MOULD CO LTD
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Patent Information

Application Number
CN202422533098.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-20
Publication Date
2025-09-16
Estimated Expiration
2034-10-20

AI Technical Summary

Technical Problem

When installing the combined cutting die, the existing reinforcement seat is fixed by bolts, which is not convenient for rapid positioning and reinforcement. The bolts are easily loosened or fallen off due to external forces, affecting the fixation.

Method used

A reinforced installation mechanism is designed, including a reinforcement component 1, a pulling adjustment component, a positioning quick installation mechanism, etc. Through the cooperation of components such as threaded pull rods, rotating rings, anti-slip reinforcement plates and guide rods, stable clamping and quick positioning of the fixing bolts are achieved, thereby improving the fixation.

Benefits of technology

The combined die-cutting reinforcement seat is prevented from shaking during use, thereby improving fixation and installation convenience and ensuring that the bolts are not easily loosened or fallen off.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a reinforcing structure of a combined cutting die, which comprises a combined cutting die reinforcing seat, the combined cutting die reinforcing seat comprises an equipment plate seat, the upper surface of the equipment plate seat is provided with a reinforcing seat body, the upper surface of the reinforcing seat body is fixedly provided with a cutting tool, and fixing bolts penetrate through the four corners of the reinforcing seat body; by designing a reinforcing and mounting mechanism, a threaded pull rod can be screwed in to drive a rotating ring to rotate in situ at the end part of a movable pull frame until the threaded pull rod is screwed in to pull the movable pull frame to drive an anti-skid reinforcing plate to be clamped and fixed in a clamping groove for reinforcing and mounting; and when the nut rotates in situ, the threaded rod is driven to move in the reinforcing seat body, and when the threaded rod moves, the anti-skid reinforcing push plate is pushed to be stably clamped and fixed to the other side of the interior of the clamping groove, so that the fixing bolt is conveniently reinforced and fixed, the combined cutting die reinforcing seat is reinforced and mounted, and the combined cutting die reinforcing seat is not prone to shaking and instability when subjected to external force.
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Description

Technical Field

[0001] The utility model belongs to the technical field of combined knife die reinforcement seats, and in particular relates to a reinforcement structure of a combined knife die. Background Art

[0002] The combined cutter die is a die for punching products. When the combined cutter die is used, it needs to be fixedly mounted on the equipment for operation. Usually, multiple cutters are fixedly mounted on the surface of the reinforcement seat and then reinforced and mounted on the equipment for operation. The existing reinforcement seat is a component for installing the combined cutter die. The reinforcement seat is convenient for quick positioning and installation during installation, and the installation is convenient. It can also be further strengthened for fixed use. Therefore, the combined cutter die is reinforced and installed through the reinforcement seat, thereby improving the fixation of the combined cutter die when the reinforcement seat is installed on the cutter die.

[0003] When installing the combined cutting die, the existing reinforcement seat directly fixes the cutter on the reinforcement seat, and then the fixing bolts pass through the corners of the reinforcement seat and are embedded in the internal threaded holes for fixed installation. After fixed installation, it is not convenient to reinforce the installation. When the reinforcement seat drives the cutter to operate frequently, it is easy to generate a certain external force. When the reinforcement seat is frequently subjected to external force, the reinforcement seat is easy to become unstable and the bolts become loose. In severe cases, the bolts fall off, which reduces the fixation of the combined cutting die when installed on the reinforcement seat, thereby affecting the problem of strengthening the fixation of the reinforcement seat when the cutting die is installed. For this reason, the utility model proposes a reinforcement structure for the combined cutting die. Utility Model Content

[0004] The purpose of the present utility model is to provide a reinforcement structure for a combined cutting die, so as to solve the problem in the above-mentioned background technology that a reinforcement seat is fixedly installed on the upper surface of the plate seat of the equipment in use by bolts, which is inconvenient for reinforcement installation. When the reinforcement seat drives the tool to operate frequently, a certain external force is easily generated. When the reinforcement seat is frequently subjected to external force, the reinforcement seat is easily unstable and the bolts become loose. In severe cases, the bolts fall off, reducing the fixity of the combined cutting die when the reinforcement seat is installed.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a reinforcement structure for a combined knife die, comprising a combined knife die reinforcement seat, the combined knife die reinforcement seat comprising an equipment plate seat, a reinforcement seat body being provided on the upper surface of the equipment plate seat, a tool being fixedly mounted on the upper surface of the reinforcement seat body, fixing bolts being passed through the four corners of the reinforcement seat body, internal threaded holes being provided at both ends of the upper surface of the fixing bolts, and the ends of the fixing bolts being matched with the internal structure of the internal threaded holes, the combined knife die reinforcement seat is further provided with:

[0006] A reinforcement installation mechanism, comprising a reinforcement component 1 arranged on one side of a fixing bolt and located inside the reinforcement base body, wherein the end of the reinforcement component 1 is located at the end of the reinforcement base body and is provided with a pulling adjustment component, and a reinforcement component 2 is arranged on the other side of the fixing bolt and located inside the reinforcement base body, wherein the end of the reinforcement component 2 is provided with a guide component;

[0007] A positioning quick installation mechanism comprises a positioning installation component which is arranged on the upper surface of the equipment plate seat and located at the edge of the reinforcement seat body.

[0008] Preferably, the reinforcement component 1 includes an adjustment groove opened at the edge of the fixing bolt and located inside the reinforcement base body, an anti-slip reinforcement plate is provided on one side of the inner side of the adjustment groove, and a clamping groove is opened on the outer surface of the fixing bolt.

[0009] Preferably, the pulling adjustment assembly includes a groove opened on one side of the adjustment slot at the end of the reinforcement seat body, a fixed seat is welded inside the groove, a movable pull frame is slidingly limited inside the fixed seat, the end of the movable pull frame and the end of the anti-slip reinforcement plate are fixed by welding, a rotating ring is rotated at the top of the movable pull frame, a threaded pull rod is rotated on the internal thread of the fixed seat, and the end of the threaded pull rod is fixed to the end of the rotating ring by welding.

[0010] Preferably, the end of the movable bracket extends to the inside of the adjustment slot, and the movable bracket is connected to the inside of the fixed seat through the rotating ring and the threaded pull rod for rotational limiting movement.

[0011] Preferably, the second reinforcement component includes an anti-slip reinforcement push plate arranged on the other side of the adjustment groove, the inner surface of the anti-slip reinforcement push plate is consistent with the inner surface structure of the clamping groove, a threaded rod passes through the middle position of the interior of the groove, one end of the threaded rod is welded and fixed to the anti-slip reinforcement push plate, and the other end of the threaded rod is located inside the groove and rotated with a nut.

[0012] Preferably, the guide assembly includes a guide groove opened on the other side of the adjustment groove and located inside the reinforcement seat body, a guide rod is provided inside the guide groove, and the end of the guide rod is welded and fixed to the end of the anti-slip reinforcement push plate.

[0013] Preferably, the positioning and mounting assembly includes a positioning groove opened in the middle position of the upper surface of the equipment plate seat, and two positioning plates are provided on both sides of the positioning groove on the upper surface of the equipment plate seat. The surface of the positioning plate is rotated with mounting bolts, and the positioning plate and the surface of the equipment plate seat are fixed by mounting bolts.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] By designing a reinforcement installation mechanism, after the combined die reinforcement seat is quickly positioned and fixed, the threaded pull rod is screwed in to drive the rotating ring to rotate in situ at the end of the mobile pull frame until the threaded pull rod is screwed in to pull the mobile pull frame to drive the anti-slip reinforcement plate to be clamped and fixed inside the clamping groove for reinforcement installation. When the nut rotates in situ again, it drives the threaded rod to move inside the reinforcement seat body, and pushes the anti-slip reinforcement push plate to stably clamp and fix it on the other side of the clamping groove when the threaded rod moves, which is convenient for strengthening the fixing bolts, thereby reinforcing the installation of the combined die reinforcement seat, and is not prone to shaking and instability when subjected to external force during use, thereby improving the reinforcement fixation of the combined die reinforcement seat when the die is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a partial cross-sectional structural diagram of the fixing bolt, reinforcement base and equipment plate base of the present invention;

[0018] Figure 3 This is a partial cross-sectional structural diagram of the fixing bolt and the internal reinforcement structure of the reinforcement seat of the present invention;

[0019] Figure 4 For this utility model Figure 3 The enlarged structural diagram of part B in the middle;

[0020] Figure 5 This is a schematic diagram of the anti-skid reinforcement plate and the movable pull frame structure of the utility model;

[0021] Figure 6 For this utility model Figure 1 A schematic diagram of the enlarged structure of part A;

[0022] In the figure: 100, combined die cutting reinforcement seat; 101, reinforcement seat body; 1011, positioning groove; 1012, positioning plate; 1013, mounting bolt; 102, cutting tool; 103, fixing bolt; 1031, adjustment groove; 1032, anti-skid reinforcement plate; 1033, clamping groove; 1034, groove; 1035, movable pull frame; 1036, rotating ring; 1037, threaded pull rod; 1038, fixed seat; 104, equipment plate seat; 105, internal threaded hole; 106, anti-skid reinforcement push plate; 1061, threaded rod; 1062, nut; 1063, guide groove; 1064, guide rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figures 1 to 5 The present invention provides a technical solution: a reinforcement structure of a combined knife die, including a combined knife die reinforcement seat 100, the combined knife die reinforcement seat 100 includes an equipment plate seat 104, a reinforcement seat body 101 is provided on the upper surface of the equipment plate seat 104, a tool 102 is fixedly installed on the upper surface of the reinforcement seat body 101, and fixing bolts 103 are passed through the four corner positions of the reinforcement seat body 101, and internal threaded holes 105 are provided at both ends of the upper surface of the fixing bolts 103, and the ends of the fixing bolts 103 match the internal structure of the internal threaded holes 105, and after the reinforcement seat body 101 is positioned and installed on the surface of the equipment plate seat 104, the fixing bolts 103 are rotated to embed into the internal threaded holes 105 to reinforce the reinforcement seat body 101, thereby facilitating the combined knife die reinforcement seat 100 to fix the tool 102 and then reinforce and fix it for use. The combined knife die reinforcement seat 100 is provided with:

[0026] The reinforcement installation mechanism includes a reinforcement component 1 arranged on one side of the fixing bolt 103 and located inside the reinforcement base body 101. The end of the reinforcement component 1 is located at the end of the reinforcement base body 101 and is provided with a pulling adjustment component. The other side of the fixing bolt 103 is located inside the reinforcement base body 101 and is provided with a reinforcement component 2. The end of the reinforcement component 2 is provided with a guide component. When the combined knife die reinforcement base 100 is used to install multiple knives 102, the reinforcement base body 101 is closed on the surface of the equipment plate base 104 and fixedly installed by the fixing bolt 103. The fixing bolt 103 is reinforced and installed again by the reinforcement installation mechanism, so that the combined knife die reinforcement base 100 is fixedly installed for use, and is not prone to shaking and instability when subjected to external force, thereby improving the enhanced fixation of the combined knife die reinforcement base 100 when installing the knife die.

[0027] In order to facilitate the reinforcement and installation of the inner side of the fixing bolt 103 through the reinforcement component 1 and facilitate the reinforcement and use, in this embodiment, preferably, the reinforcement component 1 includes an adjustment groove 1031 opened on the edge of the fixing bolt 103 and located inside the reinforcement base 101, and an anti-slip reinforcement plate 1032 is provided on the inner side of the adjustment groove 1031, and a clamping groove 1033 is opened on the outer surface of the fixing bolt 103, and the anti-slip reinforcement plate 1032 can be moved and clamped on the inner side of the clamping groove 1033 for reinforcement and installation.

[0028] In order to facilitate the pulling, clamping and fixing installation of the anti-skid reinforcement plate 1032 by pulling the adjustment component, in this embodiment, preferably, the pulling adjustment component includes a groove 1034 located at the end of the reinforcement seat body 101 on one side of the adjustment slot 1031, and a fixed seat 1038 is welded inside the groove 1034. The internal limit sliding of the fixed seat 1038 is provided with a movable pull frame 1035, and the threaded pull rod 1037 can be conveniently rotated by the fixed seat 1038, and the movable pull frame 1035 can be stably controlled to move, and the end of the movable pull frame 1035 is aligned with the anti-skid The end of the reinforcement plate 1032 is fixed by welding, and a rotating ring 1036 is rotated on the top of the movable pull frame 1035. A threaded pull rod 1037 is rotated on the internal thread of the fixed seat 1038. The end of the threaded pull rod 1037 and the end of the rotating ring 1036 are fixed by welding. The threaded pull rod 1037 is screwed in to drive the rotating ring 1036 to rotate in place at the end of the movable pull frame 1035 until the threaded pull rod 1037 is screwed in to pull the movable pull frame 1035 to drive the anti-slip reinforcement plate 1032 to be clamped and fixed in the internal reinforcement installation of the clamping groove 1033.

[0029] In order to facilitate the clamping and fixing of the other side of the fixing bolt 103 through the reinforcement component 2, in this embodiment, preferably, the reinforcement component 2 includes an anti-slip reinforcement push plate 106 arranged on the other side of the adjustment groove 1031, and the inner surface of the anti-slip reinforcement push plate 106 is consistent with the inner surface structure of the clamping groove 1033. A threaded rod 1061 passes through the middle position of the interior of the groove 1034, and one end of the threaded rod 1061 is welded and fixed to the anti-slip reinforcement push plate 106. The other end of the threaded rod 1061 is located in the interior of the groove 1034 and is rotated with a nut 1062. The nut 1062 is rotated in situ at the end of the threaded rod 1061. When the nut 1062 rotates in situ, it drives the threaded rod 1061 to move inside the reinforcement base 101, and the threaded rod 1061 pushes the anti-slip reinforcement push plate 106 to move and clamp it to the other side of the interior of the clamping groove 1033 for reinforcement installation.

[0030] In order to facilitate the anti-skid reinforced push plate 106 to drive the guide rod 1064 to move stably inside the guide groove 1063 through the guide assembly when moving, and to facilitate stable clamping and fixing, in this embodiment, preferably, the guide assembly includes a guide groove 1063 opened on the other side of the adjustment groove 1031 and located inside the reinforced base 101, and a guide rod 1064 is provided inside the guide groove 1063, and the end of the guide rod 1064 is welded and fixed to the end of the anti-skid reinforced push plate 106, so that the anti-skid reinforced push plate 106 can be driven to move stably, clamp and fix inside the guide groove 1063 when moving.

[0031] Example 2

[0032] See also Figure 1 、 Figure 2 and Figure 6 The present invention provides a technical solution: a reinforcement structure of a combined knife die, including a combined knife die reinforcement seat 100, the combined knife die reinforcement seat 100 includes an equipment plate seat 104, a reinforcement seat body 101 is provided on the upper surface of the equipment plate seat 104, a tool 102 is fixedly installed on the upper surface of the reinforcement seat body 101, and fixing bolts 103 are passed through the four corner positions of the reinforcement seat body 101, and internal threaded holes 105 are opened at both ends of the upper surface of the fixing bolts 103, and the ends of the fixing bolts 103 match the internal structure of the internal threaded holes 105, and after the reinforcement seat body 101 is positioned and installed on the surface of the equipment plate seat 104, the fixing bolts 103 are rotated to embed into the internal threaded holes 105 to reinforce the reinforcement seat body 101, thereby facilitating the combined knife die reinforcement seat 100 to fix the tool 102 and then reinforce and fix it for use. The combined knife die reinforcement seat 100 is also provided with:

[0033] A positioning quick installation mechanism, and the positioning quick installation mechanism includes a positioning installation component arranged on the upper surface of the equipment plate seat 104 at the edge of the reinforcement base body 101. When the reinforcement base body 101 is closed and installed on the surface of the equipment plate seat 104, the positioning quick installation mechanism can quickly position and install the reinforcement base body 101, making it convenient for the fixing bolts 103 and the internal threaded holes 105 to be quickly rotated and fixed, thereby improving the convenience of the combination knife die reinforcement seat 100 to install the combination knife die on the upper surface of the reinforcement base body 101 for rapid positioning and closure.

[0034] In order to facilitate the rapid positioning, closing and installation of the reinforcement base 101 through the positioning and installation component, in this embodiment, preferably, the positioning and installation component includes a positioning groove 1011 opened in the middle position of the upper surface of the equipment plate base 104, and the reinforcement base 101 can be positioned and quickly closed and installed through the positioning groove 1011 on the upper surface of the equipment plate base 104. Two positioning plates 1012 are provided on both sides of the positioning groove 1011 on the upper surface of the equipment plate base 104. The surface of the positioning plate 1012 is rotated with a mounting bolt 1013, and the positioning plate 1012 and the surface of the equipment plate base 104 are fixed by the mounting bolt 1013. At the same time, the positioning plate 1012 is fixed and installed by the mounting bolt 1013, and the reinforcement base 101 is positioned and closed again by the positioning plate 1012 when closed, which is convenient for rapid installation and use, and facilitates the rapid rotation and fixation of the fixing bolt 103 and the internal threaded hole 105.

[0035] The working principle and use process of the present invention are as follows: before use, the reinforcement structure of the combined knife die is first installed, and the positioning plates 1012 are closed on both sides of the positioning grooves 1011 and are located on the surface of the reinforcement base 101 and fixed by the mounting bolts 1013. After fixed installation, the positioning plates 1012 and the positioning grooves 1011 are used to quickly position the reinforcement base 101 and install it on the surface of the equipment plate base 104. Therefore, it is convenient to position and quickly install the combined knife die reinforcement base 100 during installation, and it is convenient to quickly rotate and fix the fixing bolts 103 and the internal threaded holes 105. This improves the convenience of quickly positioning and closing the combined knife die reinforcement base 100 when installing the combined knife die on the upper surface of the reinforcement base 101.

[0036] Then, after the combined die cutting mold reinforcement seat 100 is quickly positioned and closed, the fixing bolt 103 is rotated at the corner position of the reinforcement seat body 101 until the end of the fixing bolt 103 is rotated to the inside of the internal threaded hole 105 to fix the reinforcement seat body 101. After the fixing bolt 103 is rotated and fixed, the wrench is engaged with the end of the threaded pull rod 1037 at the internal thread of the fixing seat 1038 and screwed in. The threaded pull rod 1037 is screwed in and the rotating ring 1036 is rotated in place at the end of the mobile pull frame 1035 until the threaded pull rod 1037 is screwed in and the mobile pull frame 1035 is pulled to drive the anti-slip reinforcement plate 1032 to be clamped and fixed in the internal reinforcement installation of the clamping groove 1033. The end of 61 rotates the nut 1062 in situ, and the nut 1062 drives the threaded rod 1061 to move inside the reinforcement seat body 101 when rotating in situ, and the threaded rod 1061 pushes the anti-slip reinforcement push plate 106 to move when moving, and drives the guide rod 1064 to guide and control the inside of the guide groove 1063 when the anti-slip reinforcement push plate 106 moves, until the anti-slip reinforcement push plate 106 is stably clamped and fixed on the other side of the clamping groove 1033, so that the fixing bolt 103 can be rotated and fixed to strengthen the fixed installation, thereby reinforcing the installation of the combined knife die reinforcement seat 100 for use, and it is not easy to shake and be unstable when subjected to external force during use, thereby improving the strengthening fixation of the combined knife die reinforcement seat 100 when the knife die is installed.

[0037] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reinforcement structure for a combined cutting die, comprising a combined cutting die reinforcement seat (100), wherein the combined cutting die reinforcement seat (100) comprises an equipment plate seat (104), a reinforcement seat body (101) is provided on the upper surface of the equipment plate seat (104), a tool (102) is fixedly mounted on the upper surface of the reinforcement seat body (101), fixing bolts (103) are passed through the four corner positions of the reinforcement seat body (101), internal threaded holes (105) are provided at both ends of the upper surface of the fixing bolts (103), and the ends of the fixing bolts (103) match the internal structure of the internal threaded holes (105), and the characteristics are: The combined die reinforcement seat (100) is also provided with: A reinforcement installation mechanism, wherein the reinforcement installation mechanism comprises a reinforcement component 1 arranged on one side of a fixing bolt (103) and located inside a reinforcement base (101); an end portion of the reinforcement component 1 is located at the end portion of the reinforcement base (101) and is provided with a pulling adjustment component; a reinforcement component 2 is arranged on the other side of the fixing bolt (103) and located inside the reinforcement base (101); and an end portion of the reinforcement component 2 is provided with a guide component; A positioning quick installation mechanism is provided, and the positioning quick installation mechanism comprises a positioning installation component arranged on the upper surface of the equipment plate seat (104) and located at the edge of the reinforcement seat body (101).

2. The reinforcement structure of a combined knife die according to claim 1, characterized in that: The reinforcement component 1 includes an adjustment groove (1031) provided at the edge of the fixing bolt (103) and located inside the reinforcement base (101); an anti-slip reinforcement plate (1032) is provided on one side of the interior of the adjustment groove (1031); and a clamping groove (1033) is provided on the outer surface of the fixing bolt (103).

3. The reinforcement structure of the combined cutting die according to claim 2, characterized in that: The pulling adjustment component comprises a groove (1034) provided on one side of the adjustment slot (1031) and located at the end of the reinforcement seat (101); a fixed seat (1038) is welded inside the groove (1034); a movable pull frame (1035) is provided inside the fixed seat (1038) for limited sliding; the end of the movable pull frame (1035) is fixed to the end of the anti-slip reinforcement plate (1032) by welding; a rotating ring (1036) is rotated at the top of the movable pull frame (1035); a threaded pull rod (1037) is rotated on the internal thread of the fixed seat (1038); and the end of the threaded pull rod (1037) is fixed to the end of the rotating ring (1036) by welding.

4. The reinforcement structure of the combined knife die according to claim 3, characterized in that: The end of the movable pull frame (1035) extends to the inside of the adjustment slot (1031), and the movable pull frame (1035) and the inside of the fixed seat (1038) are connected to each other in a rotationally limited manner through the rotating ring (1036) and the threaded pull rod (1037).

5. The reinforcement structure of the combined cutting die according to claim 3, characterized in that: The second reinforcement component includes an anti-slip reinforcement push plate (106) arranged on the other side of the adjustment groove (1031), the inner surface of the anti-slip reinforcement push plate (106) is consistent with the inner surface structure of the clamping groove (1033), a threaded rod (1061) passes through the middle position of the inner part of the groove (1034), one end of the threaded rod (1061) is welded and fixed to the anti-slip reinforcement push plate (106), and the other end of the threaded rod (1061) is located inside the groove (1034) and is rotated with a nut (1062).

6. The reinforcement structure of a combined cutting die according to claim 4, characterized in that: The guide assembly comprises a guide groove (1063) provided on the other side of the adjustment groove (1031) and located inside the reinforcement seat (101); a guide rod (1064) is provided inside the guide groove (1063); and the end of the guide rod (1064) is welded and fixed to the end of the anti-slip reinforcement push plate (106).

7. The reinforcement structure of a combined cutting die according to claim 1, characterized in that: The positioning and mounting assembly comprises a positioning groove (1011) provided at a middle position on the upper surface of the equipment plate seat (104); two positioning plates (1012) are provided on both sides of the positioning groove (1011) and located on the upper surface of the equipment plate seat (104); mounting bolts (1013) are rotated on the surface of the positioning plates (1012), and the positioning plates (1012) and the surface of the equipment plate seat (104) are fixed by the mounting bolts (1013).