Disassembling and assembling tool set for oil seal of speed reducer

Abstract

The utility model discloses a speed reducer oil seal dismounting tool set and relates to the field of speed reducer oil seals. The speed reducer oil seal disassembling and assembling tool set comprises a lower support, an upper support, a driving part, an adjusting rack and a tongue plate. The lower support is detachably connected with the speed reducer, and the upper support is arranged on the upper portion of the lower support and detachably connected with the lower support. The driving piece is connected with the upper support, a driving shaft of the driving piece is connected with the adjusting rack, and the tongue plates are symmetrically arranged at the two ends of the adjusting rack. The tongue plate comprises a rod body detachably connected with the adjusting rack and a tilting rod arranged at one end of the rod body, and the tilting rod is perpendicular to the rod body. The device can be adapted to speed reducers of different models and sizes, and the speed reducer oil seal can be quickly disassembled and assembled. Meanwhile, the device is simple in structure, convenient to use and safe.

Description

Technical Field

[0001] The utility model relates to the field of reducer oil seals, in particular to a reducer oil seal disassembly and assembly tool set. Background Art

[0002] Tobacco redrying refers to the process of re-roasting the raw tobacco that has been initially prepared. The main purpose is to adjust the moisture content of the tobacco leaves for safe storage.

[0003] In the tobacco redrying operation, reducers of different models and specifications are used to realize the operation of the equipment and the transportation of tobacco leaves. The reducer oil seal has certain requirements for its installation and removal according to the different reducer models and the different installation positions of the reducer. The main function of the reducer oil seal is to prevent the lubricating oil from leaking from the inside of the reducer. The oil seal forms an effective sealing barrier by tightly fitting the shaft surface to prevent the lubricating oil from leaking, thereby ensuring the normal operation of the reducer; in general redrying operation workshops, in order to adapt to the production and processing needs of modern enterprises, a large number of equipment with reducers are used for operation, and once the equipment with reducers is installed in place, the position is basically fixed. During the later maintenance of the reducer oil seal, there will be no large-scale removal of the reducer from the equipment for the reducer oil seal maintenance. The reducer oil seal will only be removed and installed on fixed equipment in limited maintenance space. Due to the small operating space, it is difficult to repair quickly and effectively, and the lubricating oil leaks from the inside of the reducer during the maintenance and replacement of the reducer oil seal, thereby polluting the production environment and products.

[0004] In the prior art, there are usually two ways to replace the reducer oil seal:

[0005] The first method is to use mechanical force to dismantle and install, using pliers, wrenches and other tools to clamp or rotate it to make the oil seal fall off. When using mechanical force, due to the frequent inaccurate control of the force, destructive damage to the equipment is caused.

[0006] The second method: removing the oil seal by heating it to loosen it. Use a flame gun or other heating equipment to heat the oil seal for a period of time to loosen it, and then use tools to remove it. Since it is difficult to control and maintain the temperature during the heating process, it may cause damage to the equipment or personnel safety.

[0007] The third method: using a special oil seal remover. The existing oil seal remover requires that there must be bolt holes on the matching shaft of the reducer with oil seal. However, most of the matching shafts of the reducers with oil seals in our daily production process do not have machined bolt holes, so the existing oil seal remover cannot be used. In addition, the oil seal remover does not have the ability to handle oil leakage from the inside of the reducer, which leads to pollution of the production environment and products during the removal and installation of the oil seal.

[0008] According to the applicant's daily work statistics, since the position of each reducer is relatively fixed according to the use of the equipment, the size and orientation of the maintenance space changes according to requirements. If a reducer oil seal is removed and installed, the reducer must be removed from the equipment for maintenance. The maintenance time used, as well as the current method of removing and installing the reducer oil seal on the equipment, will increase the maintenance time of the equipment and cause damage to the equipment, and pollution to the production environment and products.

[0009] Therefore, there is an urgent need for a special tool for disassembling and assembling the reducer oil seal which is highly applicable, convenient, fast and safe. Utility Model Content

[0010] In order to solve the above problems, the present application provides a speed reducer oil seal disassembly and assembly tool set, which has strong applicability and is convenient, fast and safe.

[0011] The reducer oil seal disassembly and assembly tool set provided in the present application includes a lower bracket, an upper bracket, a driving member, an adjustment frame and a tongue plate. The lower bracket is detachably connected to the reducer, and the upper bracket is arranged on the upper part of the lower bracket and is detachably connected to the lower bracket. The driving member is connected to the upper bracket, and the driving member is connected to the adjustment frame, and the tongue plate is symmetrically arranged at both ends of the adjustment frame. The tongue plate includes a rod body detachably connected to the adjustment frame and a tilting rod arranged at one end of the rod body, and the tilting rod is arranged perpendicular to the rod body. When in use, the tilting rod is connected to the reducer oil seal.

[0012] In a specific embodiment, the driving member is a threaded rod, and the bottom end of the driving member is connected to the adjustment frame. The upper bracket is provided with a driving opening, which is a screw hole, and the driving member is inserted into the driving opening and is threadedly connected to the driving opening.

[0013] In a specific embodiment, the upper portion of the lower bracket is further provided with a first adjustment piece extending upward, and the lower portion of the upper bracket is further provided with a second adjustment piece extending downward. The first adjustment piece and the second adjustment piece are detachably connected.

[0014] In a specific embodiment, it further comprises an adjustment plate, wherein the lower portion of the adjustment plate is detachably connected to the first adjustment piece, and the upper portion of the adjustment plate is detachably connected to the second adjustment piece.

[0015] In a specific embodiment, the first adjusting plate is provided with a first connecting hole, the second adjusting plate is provided with a second connecting hole, the adjusting plate is provided with a first connecting groove and a second connecting groove, the first connecting hole is detachably connected to the first connecting groove, and the second connecting hole is detachably connected to the second connecting groove.

[0016] In a specific embodiment, a positioning rod is further included. A plurality of positioning openings are evenly arranged on the side wall of the lower bracket, and the positioning rod is passed through the positioning openings and is slidably connected to the positioning openings.

[0017] In a specific implementation, the positioning rod is a screw rod, the positioning opening is a screw hole, and the positioning rod and the positioning opening are threadedly connected.

[0018] In a specific embodiment, an oil receiving box is also included. An oil receiving box opening is also provided on the side wall of the lower bracket, and the oil receiving box is detachably connected to the oil receiving box opening.

[0019] In a specific embodiment, a slide slot is provided on the adjusting frame, and the rod body is disposed in the slide slot and is slidably connected to the slide slot.

[0020] In a specific embodiment, the upper bracket further includes a first auxiliary plate, on which an auxiliary rod opening is provided. The adjustment frame further includes a second auxiliary plate, on which an auxiliary rod extending upward is provided, the auxiliary rod is inserted into the auxiliary rod opening and is slidably connected to the auxiliary rod opening.

[0021] The reducer oil seal disassembly and assembly tool set provided in this application has the following beneficial effects:

[0022] 1) The present application can be adapted to reducers of different models and sizes, and the reducer oil seal can be quickly disassembled and assembled. At the same time, the device has a simple structure, is easy to use and relatively safe.

[0023] 2) The adjustment plate designed in the present application can adjust the overall connection height between the lower bracket and the upper bracket, thereby enabling the present application to match reducers of more models and sizes, thereby improving the practicality of the present application.

[0024] 3) The positioning member designed in the present application can prevent the reducer oil seal from deviating in the moving direction when being pushed downward, thereby improving the accuracy of the present application.

[0025] 4) The present application designs an auxiliary rod as a driven mechanism of the driving member, which can further stabilize the lifting when the driving member drives the frame to lift.

[0026] 5) The oil collecting box designed in the present application can prevent the lubricating oil in the annular groove from flowing out when the reducer oil seal is removed, thereby preventing the lubricating oil from affecting the environment and improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0028] Figure 2 The utility model is a structural schematic diagram of the utility model when the reducer oil seal is disassembled.

[0029] Figure 3 The utility model is a structural schematic diagram of the installation of the reducer oil seal.

[0030] Figure 4It is a structural schematic diagram of the upper bracket, driving member and adjusting frame of the utility model.

[0031] Figure 5 It is a structural schematic diagram of the lower bracket of the utility model.

[0032] Figure 6 It is a structural schematic diagram of the adjustment plate of the utility model.

[0033] Reference numerals

[0034] Lower bracket 1

[0035] First adjustment piece 11

[0036] First connecting hole 11.1

[0037] Upper bracket 2

[0038] Second adjustment piece 21

[0039] Second connecting hole 21.1

[0040] First auxiliary plate 22

[0041] Auxiliary rod opening 22.1

[0042] Drive 3

[0043] Drive opening 31

[0044] Adjustment rack 4

[0045] Chute 41

[0046] Second auxiliary plate 42

[0047] Auxiliary rod 42.1

[0048] tongue plate 5

[0049] Rod body 51

[0050] Crank 52

[0051] Adjustment plate 6

[0052] First connecting groove 61

[0053] Second connecting groove 62

[0054] Positioning rod 7

[0055] Positioning opening 71

[0056] Positioning nut 72

[0057] Oil box 8

[0058] Oil box opening 81

[0059] Reducer oil seal 9 DETAILED DESCRIPTION

[0060] 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 making creative work are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "above", "below", "top", "bottom", "two ends", "side wall", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0063] In order to better explain the structure of the present application, the setting method of the reducer oil seal 9 is briefly described first: the reducer oil seal 9 is generally annular, and an annular groove is provided on the end face of the reducer oil seal, and the reducer oil seal 9 is arranged in the annular groove. It is now stipulated that the top surface of the reducer oil seal 9 is the surface in the same plane as the end face of the reducer oil seal, that is, the surface that does not contact the annular groove; the bottom surface of the reducer oil seal 9 is the surface in contact with the bottom of the annular groove, that is, the surface relative to the top surface of the reducer oil seal 9. With the above concepts and definitions, the mechanism setting of the present application will be described in detail.

[0064] The reducer oil seal disassembly and assembly tool set provided in this application is used to disassemble or install the reducer oil seal 9, refer to Figure 1, including a lower bracket 1, an upper bracket 2, a driving member 3, an adjusting frame 4 and a tongue plate 5. The lower bracket 1 is detachably connected to the reducer. Specifically, the lower bracket 1 is connected to the end face of the reducer oil seal, and the end face of the reducer oil seal is the face for disassembling and installing the reducer oil seal 9. Figure 1 The upper bracket 2 is arranged on the upper part of the lower bracket 1 and is detachably connected to the lower bracket 1. The driving member 3 is connected to the upper bracket 2, and the driving member 3 is connected to the adjusting frame 4. The driving member 3 can drive the adjusting frame 4 to move up and down. The tongue plates 5 are symmetrically arranged at both ends of the adjusting frame 4. The tongue plates 5 are used to hook the lower surface of the reducer oil seal 9 or to support the upper surface of the reducer oil seal 9, so as to remove or install the reducer oil seal 9. Specifically, refer to Figure 1 The tongue plate 5 includes a rod body 51 detachably connected to the adjustment frame 4 and a tilting rod 52 arranged at one end of the rod body 51, and the tilting rod 52 is arranged perpendicular to the rod body 51. Preferably, the tilting rod 52 and the rod body 51 are integrally formed. The reducer oil seal 9 disassembly and assembly tool set of the present application can be used to disassemble the reducer oil seal 9 and also to install the reducer. 1) When disassembling the reducer oil seal 9, see Figure 2 First, remove the tongue plate 5 from the adjustment frame 4, manually hold the tongue plate 5 and insert the tilting rod 52 into the gap between the reducer oil seal 9 and the annular groove (generally speaking, the gap between the reducer oil seal 9 and the inner ring of the annular groove). At this time, the rod body 51 is roughly parallel to the top surface of the reducer oil seal 9. Then, lift the rod body 51 so that the tilting rod 52 is inserted into the bottom surface of the reducer oil seal 9, and the rod body 51 replaces the tilting rod 52 and is inserted into the gap between the reducer oil seal 9 and the annular groove. Then, connect the rod body 51 to the adjustment frame 4, and then control the driving member 3 to drive the adjustment frame 4 to move upward and drive the tongue plate 5 to move upward synchronously. Since the tilting rod 52 has been inserted into the bottom surface of the reducer oil seal 9, when the adjustment frame 4 moves upward, the tilting rod 52 will also drive the reducer oil seal 9 to move upward synchronously, thereby removing the reducer oil seal 9 from the annular groove and completing the disassembly of the reducer oil seal 9. 2) When installing the reducer oil seal 9, see for details. Figure 3 , first place the reducer oil seal 9 roughly in the position of the annular groove, then connect the tongue plate 5 to the adjustment frame 4, and then control the driving member 3 to drive the adjustment frame 4 to move downward and drive the tongue plate 5 to move downward synchronously. During the downward movement of the tongue plate 5, the tilting rod 52 will support the top surface of the reducer oil seal 9, and then gradually push the reducer oil seal 9 downward, thereby pushing the reducer oil seal 9 into the annular groove to complete the installation of the reducer oil seal 9. According to the above settings, the present application can adapt to reducers of different models and sizes, and quickly disassemble and assemble the reducer oil seal 9. At the same time, the device has a simple structure, is easy to use and is relatively safe.

[0065] Further, see Figure 4The driving member 3 is a threaded rod, and the bottom end of the driving member 3 is connected to the adjustment frame 4. The upper bracket 2 is provided with a driving opening 31, which is a screw hole. The driving member 3 is inserted into the driving opening 31 and is threadedly connected to the driving opening 31. When in use, the driving member 3 is screwed into the driving opening 31, and then the driving member 3 is controlled to rotate forward or reverse to realize the lifting and lowering of the driving member 3.

[0066] Further, see Figure 4 , a slide groove 41 is provided on the adjustment frame 4, and the rod body 51 is arranged in the slide groove 41 and is slidably connected to the slide groove 41. Preferably, one end of the slide groove 41 is open, and a slider is provided on the top of the rod body 51. When the slide groove 41 and the rod body 51 need to be connected, the slider on the top of the rod body 51 can be hung from the opening of the slide groove 41. The same is true when removing the rod body 51. Since there are many models and sizes of the reducer oil seal 9, the above-mentioned settings enable the present application to match reducers of more models and sizes, thereby improving the practicality of the present application.

[0067] In one specific embodiment, see Figure 4 and Figure 5 The upper part of the lower bracket 1 is also provided with a first adjustment piece 11 extending upward, and the lower part of the upper bracket 2 is also provided with a second adjustment piece 21 extending downward, and the first adjustment piece 11 and the second adjustment piece 21 are detachably connected. Figure 1 As shown, two first adjustment pieces 11 are provided and should be located on the same straight line passing through the center of the lower bracket 1, and two second adjustment pieces 21 are provided and should be located on the same straight line passing through the center of the upper bracket 2. The first adjustment piece 11 and the second adjustment piece 12 can be connected by screws, buckles or hinges. More specifically, as Figure 6 As shown, it also includes an adjustment plate 6. The lower part of the adjustment plate 6 is detachably connected to the first adjustment plate 11, and the upper part of the adjustment plate 6 is detachably connected to the second adjustment plate 21. Preferably, as Figure 4 and Figure 5 As shown, the first adjusting plate 11 is provided with a first connecting hole 11.1, and the second adjusting plate 21 is provided with a second connecting hole 21.1. Figure 6As shown, the adjustment plate 6 is provided with a first connection groove 61 and a second connection groove 62, the first connection hole 11.1 is detachably connected to the first connection groove 61, and the second connection hole 21.1 is detachably connected to the second connection groove 62. When adjusting the overall connection height of the lower bracket 1 and the upper bracket 2 by the adjustment plate 6, first align the first connection hole 11.1 with the first connection groove 61. The first connection hole 11.1 can be aligned with any position in the first connection groove 61. If you want to shorten the overall connection height of the lower bracket 1 and the lower bracket 2, the first connection hole 11.1 can be aligned with the top position of the first connection groove 61; if you want to extend the overall connection height of the lower bracket 1 and the lower bracket 2, the first connection hole 11.1 can be aligned with the bottom position of the first connection groove 61. Subsequently, screw the screw into the first connection hole 21.1 and the first connection groove 61, and fix them with the nut. The connection relationship and adjustment method between the second connection hole 21.1 and the second connection groove 62 are similar to those between the first connection hole 21.1 and the first connection groove 6, and will not be repeated here. Since the adjustment plate 6 can adjust the overall connection height of the lower bracket 1 and the upper bracket 2, the present application can match reducers of more models and sizes, thereby improving the practicality of the present application.

[0068] In one specific embodiment, see Figure 3 and Figure 5 , and also includes a positioning rod 7. A plurality of positioning openings 71 are evenly arranged on the side wall of the lower bracket 1, and the positioning rod 7 is penetrated in the positioning opening 71 and slidably connected to the positioning opening 71. The positioning rod 7 is generally used when installing the reducer oil seal 9. As mentioned above, when installing the reducer oil seal 9, the reducer oil seal 9 needs to be roughly placed on the annular groove first, and then the reducer oil seal 9 is pushed into the annular groove by the downward pressure of the tongue plate 5. However, when the reducer oil seal 9 is placed on the annular groove, it is inevitable that it will not be placed flat, which will cause the movement direction of the reducer oil seal 9 to deviate when the tongue plate 5 pushes the reducer oil seal 9 downward. In order to solve this technical problem, the present application designs a positioning rod 7. When the reducer oil seal 9 is placed on the annular groove, the position of each positioning rod 7 is adjusted so that the top of the positioning rod 7 can roughly support the side wall of the annular groove. In this way, the deviation of the movement direction of the reducer oil seal 9 during the downward push can be avoided, and the accuracy of the present application is improved. Preferably, the positioning rod 7 is a screw rod, the positioning opening 71 is a screw hole, the positioning rod 7 and the positioning opening 71 are threadedly connected, and when the positioning rod 7 needs to be fixed in the positioning opening 71, it is fixed with a nut.

[0069] In one specific embodiment, see Figure 4The upper bracket 2 further includes a first auxiliary plate 22, on which an auxiliary rod opening 22.1 is provided. The adjusting frame 4 further includes a second auxiliary plate 42, on which an auxiliary rod 42.1 extending upward is provided, the auxiliary rod 42.1 is passed through the auxiliary rod opening 22.1, and is slidably connected to the auxiliary rod opening 22.1. Preferably, the upper bracket 2 and the first auxiliary plate 22 are integrally formed, and the adjusting frame 4 and the second auxiliary plate 42 are integrally formed. The auxiliary rod 42.1 is equivalent to the driven mechanism of the driving member 3, and when the driving member 3 drives the adjusting frame to rise and fall, it plays a role in further stabilizing the rise and fall.

[0070] Furthermore, as described in the background technology, the main function of the reducer oil seal 9 is to prevent the lubricating oil from leaking, thereby ensuring the normal operation of the reducer. However, when the reducer oil seal 9 is removed, the lubricating oil will inevitably flow out of the annular groove. Therefore, the present application designs a specific embodiment to solve the above problem: See Figure 5 , and also includes an oil receiving box 8. An oil receiving box opening 81 is also provided on the side wall of the lower bracket 1, and the oil receiving box 8 is detachably connected to the oil receiving box opening 81. When in use, align the oil receiving box 8 with the oil receiving box opening 81 on the side wall of the lower bracket 1, and connect the oil receiving box 8 to the oil receiving box opening 81, preferably using screws for connection. In addition, the end face of the reducer oil seal is generally vertical to the ground, so the lubricating oil flows downward under the influence of gravity. Therefore, when setting the lower bracket 1 and the oil receiving box 8, the oil receiving box opening 81 needs to be placed at the bottom, and the oil receiving box 8 supports the oil receiving box opening 81 from bottom to top. Through the above-mentioned arrangement, the lubricating oil in the annular groove can be prevented from flowing out when the reducer oil seal 9 is removed, thereby preventing the lubricating oil from affecting the environment and improving the safety of the device.

[0071] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A reducer oil seal disassembly and assembly tool set, used for disassembling or installing a reducer oil seal (9) in a reducer, characterized in that: It comprises a lower bracket (1), an upper bracket (2), a driving member (3), an adjusting frame (4) and a tongue plate (5); The lower bracket (1) is detachably connected to the reducer, the upper bracket (2) is arranged on the upper part of the lower bracket (1) and is detachably connected to the lower bracket (1); the driving member (3) is connected to the upper bracket (2), the driving member (3) is connected to the adjustment frame (4), and the tongue plate (5) is symmetrically arranged at both ends of the adjustment frame (4); The tongue plate (5) comprises a rod body (51) detachably connected to the adjustment frame (4) and a tilting rod (52) arranged at one end of the rod body (51), wherein the tilting rod (52) is arranged perpendicular to the rod body (51); when in use, the tilting rod (52) is connected to the reducer oil seal (9).

2. The reducer oil seal disassembly and assembly tool set according to claim 1, characterized in that: The driving member (3) is a threaded rod, and the bottom end of the driving member (3) is connected to the adjusting frame (4); a driving opening (31) is provided in the upper bracket (2), and the driving opening (31) is a screw hole, and the driving member (3) is inserted into the driving opening (31) and is threadedly connected to the driving opening (31).

3. The reducer oil seal disassembly and assembly tool set according to claim 1, characterized in that: The upper portion of the lower bracket (1) is also provided with a first adjustment piece (11) extending upward, and the lower portion of the upper bracket (2) is also provided with a second adjustment piece (21) extending downward; the first adjustment piece (11) and the second adjustment piece (21) are detachably connected.

4. The reducer oil seal disassembly and assembly tool set according to claim 3, characterized in that: It also comprises an adjustment plate (6); the lower part of the adjustment plate (6) is detachably connected to the first adjustment piece (11), and the upper part of the adjustment plate (6) is detachably connected to the second adjustment piece (21).

5. The reducer oil seal disassembly and assembly tool set according to claim 4, characterized in that: The first adjustment sheet (11) is provided with a first connection hole (11.1), and the second adjustment sheet (21) is provided with a second connection hole (21.1); the adjustment plate (6) is provided with a first connection groove (61) and a second connection groove (62); the first connection hole (11.1) is detachably connected to the first connection groove (61), and the second connection hole (21.1) is detachably connected to the second connection groove (62).

6. The reducer oil seal disassembly and assembly tool set according to claim 5, characterized in that: It also includes a positioning rod (7); a plurality of positioning openings (71) are evenly arranged on the side wall of the lower bracket (1); the positioning rod (7) is inserted into the positioning opening (71) and is slidably connected to the positioning opening (71).

7. The reducer oil seal disassembly and assembly tool set according to claim 6, characterized in that: The positioning rod (7) is a screw rod, the positioning opening (71) is a screw hole, and the positioning rod (7) and the positioning opening (71) are threadedly connected.

8. The reducer oil seal disassembly and assembly tool set according to claim 1, characterized in that: It also includes an oil receiving box (8); an oil receiving box opening (81) is also provided on the side wall of the lower bracket (1); the oil receiving box (8) is detachably connected to the oil receiving box opening (81).

9. The reducer oil seal disassembly and assembly tool set according to claim 1, characterized in that: The adjusting frame (4) is provided with a slide groove (41), and the rod body (51) is arranged in the slide groove (41) and is slidably connected to the slide groove (41).

10. The reducer oil seal disassembly and assembly tool set according to claim 1, characterized in that: The upper bracket (2) further comprises a first auxiliary plate (22), the first auxiliary plate (22) being provided with an auxiliary rod opening (22.1); the adjustment frame (4) further comprises a second auxiliary plate (42), the second auxiliary plate (42) being provided with an auxiliary rod (42.1) extending upward, the auxiliary rod (42.1) being inserted into the auxiliary rod opening (22.1) and being slidably connected to the auxiliary rod opening (22.1).

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