Power supply cable holder

Abstract

The invention discloses a power supply cable fixer, which relates to the technical field of fixers and solves the technical problem of being inconvenient to disassemble. The invention comprises a fixing ring, on which a sealing arc is slidably installed, a clamping assembly is arranged on the fixing ring, and is used to clamp and fix the sealing arc on the fixing ring, and a fastening assembly is arranged on the fixing ring, and the fastening assembly comprises a fastening belt fixedly installed on the fixing ring, and is used to fasten the cable in the fixing ring; the fastening assembly comprises a mounting plate fixedly installed on both sides of the fixing ring close to one end of the sealing arc, and winding rollers are rotatably installed on the two mounting plates, and a self-locking disk with a triangular block is rotatably installed on the side of the mounting plate away from the winding roller, and a self-locking unit is arranged on the side of the mounting plate close to the self-locking disk, and is used to limit and lock the self-locking disk; the fixing and disassembly of the cable is convenient, and the work efficiency of the maintenance personnel is improved, and the firmness of the cable installation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fixers, and in particular to a power supply cable fixer. Background Art

[0002] During the maintenance of power supply lines, in order to ensure normal power supply downstream, it is necessary to temporarily arrange spare cables on the side to temporarily replace the power supply lines. The spare cables usually need to be temporarily fixed on the cross arm bracket. Generally, rope bundling is used, which easily causes the cables to be loosely fixed. For example, the Chinese invention patent with patent publication number CN117096795A solves the problem of loose cable fixation.

[0003] However, after the power supply line is repaired, it is troublesome to remove the cable fixing device on the spare cable, which affects the disassembly efficiency of the maintenance personnel. Therefore, based on the technical defects, we propose a power supply cable fixer that can solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to improve a power supply cable fixture and solve the following technical problems:

[0005] After repairing the power supply line, it is troublesome to remove the fixed equipment on the spare cable, which affects the work efficiency of the maintenance personnel.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A power supply cable holder, comprising a fixing ring, a sealing arc is slidably mounted on the fixing ring, a clamping assembly is provided on the fixing ring, and is used to clamp and fix the sealing arc on the fixing ring, and a fastening assembly is provided on the fixing ring, and the fastening assembly includes a fastening belt fixedly mounted on the fixing ring and is used to fasten the cable in the fixing ring;

[0008] The fastening assembly includes mounting plates fixedly mounted on both sides of the fixing ring near one end of the sealing arc, winding rollers are rotatably mounted on the two mounting plates, a self-locking disk with a triangular block is rotatably mounted on the side of the mounting plate away from the winding roller, a self-locking unit is provided on the side of the mounting plate close to the self-locking disk for limiting and locking the self-locking disk, a hydraulic telescopic rod is fixedly mounted on one end of the sealing arc away from the fixing ring for moving the fastening belt to wrap the cable in the fixing ring, a fastening arc plate that can spirally rise is installed in the fixing ring for supporting the fastening belt to wrap the cable.

[0009] As a further solution of the present invention: the self-locking unit includes a baffle fixedly mounted on the mounting plate, a guide cylinder fixedly mounted on the side of the baffle close to the self-locking disk, a self-locking head slidably mounted in the guide cylinder, a second spring and a sliding rod fixedly mounted on the side of the self-locking head away from the self-locking disk, and an end of the sliding rod away from the self-locking head slides through the baffle and is fixedly mounted with a pull ring.

[0010] As a further solution of the present invention: the other end of the second spring is slidably mounted on the baffle, the second spring is nested on the outer surface of the slide rod, and a right-angle groove and an inclined surface are respectively provided at one end of the self-locking head close to the self-locking disk.

[0011] As a further solution of the present invention: the other end of the tightening belt is fixedly mounted on the winding roller and wound around the winding roller, the rotating shaft of the self-locking disk slides through the mounting plate and is fixedly mounted on the winding roller, a bolt is threadedly installed through the position of the fixing ring away from the sealing arc, and the other end of the bolt is rotatably mounted on the tightening arc plate.

[0012] As a further solution of the present invention: the locking assembly includes a limiting groove opened on one side of the fixing ring, a limiting block with a locking groove is fixedly installed on the side of the sealing arc close to the limiting groove, a locking plate is slidably installed in the limiting groove, and a button rod is fixedly installed on one side of the locking plate.

[0013] As a further solution of the present invention: the number of the engaging plates is two, the engaging plates are engaged and inserted in the engaging grooves, a first spring is fixedly installed between the two engaging plates, and the end of the button rod away from the first spring slides through the fixing ring.

[0014] As a further solution of the present invention: fixing components are arranged on both sides of the fixing ring away from the mounting plate, the fixing components include a storage groove opened on the fixing ring, and a fixing plate is slidably installed in the storage groove, a handle is fixedly installed on the side of the fixing plate away from the fixing ring, and a mounting hole is opened on the fixing plate.

[0015] As a further solution of the present invention: grooves are provided on both sides of the fixing plate close to one end of the handle, and a support plate is rotatably mounted on one side of the groove close to the handle.

[0016] As a further solution of the present invention: a rectangular slide groove is opened on the position of the fixing ring close to the mounting plate, the sealing arc is slidably installed in the rectangular slide groove, waist-shaped slide grooves are opened on the inner walls on both sides of the rectangular slide groove, and a limiting column is fixedly installed on one end of the sealing arc away from the hydraulic telescopic rod, and the limiting column is slidably installed in the waist-shaped slide groove.

[0017] As a further solution of the present invention: waist-shaped through holes are opened on both sides of the sealing arc close to the waist-shaped slide groove, a support rod is fixedly installed on the inner side of the waist-shaped slide groove close to one end of the hydraulic telescopic rod, and the support rod is slidably installed in the waist-shaped through hole.

[0018] Beneficial effects of the present invention:

[0019] (1) The fastening belt in the fastening assembly cooperates with the self-locking unit and the fastening arc plate to fasten the cable. It is also easy to install and disassemble, convenient and flexible to use, which is beneficial to improving the work efficiency of installation and disassembly of maintenance personnel, improving the firmness of cable installation, reducing the maintenance cost of the cable, and improving the flexible utilization rate of the device;

[0020] (2) The limit block in the clamping assembly is inserted into the limit groove, which facilitates the clamping connection between the sealing arc and the fixing ring, facilitates operation and use, is conducive to improving the clamping and fixing ability of the device, and is conducive to improving the work efficiency of the device installation;

[0021] (3) The fixing plate in the fixing assembly is convenient for telescopic storage and flexible operation. The support plate increases the supporting area of ​​the fixing plate, which is beneficial to improving the supporting stability of the device and the flexible applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of a power supply cable fixture of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 3 It is a bottom view structural schematic diagram of a power supply cable fixture of the present invention;

[0026] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 5 yes Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0028] Figure 6 It is a partial structural schematic diagram of the self-locking unit;

[0029] Figure 7 It is a side view structural schematic diagram of a power supply cable fixture of the present invention;

[0030] Figure 8 yes Figure 7Schematic diagram of the enlarged structure at D in the middle;

[0031] Fig. 9 yes Figure 7 Schematic diagram of the enlarged structure at E in the middle.

[0032] In the figure: 1. fixing ring; 2. sealing arc; 3. engaging assembly; 31. limiting block; 32. engaging groove; 33. limiting groove; 34. engaging plate; 35. first spring; 36. button rod; 4. fastening assembly; 41. mounting plate; 42. winding roller; 43. fastening belt; 44. self-locking disk; 45. triangular block; 46. baffle; 47. guide cylinder; 48. self-locking head; 49. second spring; 410. sliding rod; 411. pull ring; 412. hydraulic telescopic rod; 413. fastening arc plate; 414. bolt; 5. fixing assembly; 51. fixing plate; 52. supporting plate; 53. mounting hole; 54. handle; 55. groove; 6. rectangular slide groove; 7. waist-shaped slide groove; 8. limiting column; 9. waist-shaped through hole; 10. supporting rod; 11. iron sheet; 12. magnet. DETAILED DESCRIPTION

[0033] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0034] For example, see Figure 1 - Fig. 9As shown, the present invention is a power supply cable fixer, including a fixing ring 1, on which a sealing arc 2 is slidably installed. The sealing arc 2 cooperates with the fixing ring 1 to form a sealed ring under the action of the clamping assembly 3, which plays a role in limiting and fixing the cable. Under the wrapping of the tightening belt 43, it plays a role in further tightening the cable, which is beneficial to improving the firmness of the installation of the device. A rectangular slide groove 6 is opened at a position of the fixing ring 1 close to the mounting plate 41, and the sealing arc 2 is slidably installed in the rectangular slide groove 6. Waist-shaped slide grooves 7 are opened on the inner walls on both sides of the rectangular slide groove 6. A limiting column 8 is fixedly installed at one end of the sealing arc 2 away from the hydraulic telescopic rod 412, and the limiting column 8 is slidably installed in the waist-shaped slide groove 7, which plays a role in limiting and stabilizing the position of the sealing arc 2 in the rectangular slide groove 6. The sealing arc 2 is close to the waist-shaped slide groove 7. Waist-shaped through holes 9 are provided on both sides, and a support rod 10 is fixedly installed on the inner side of one end of the waist-shaped slide 7 close to the hydraulic telescopic rod 412. The support rod 10 is slidably installed in the waist-shaped through hole 9, and the support rod 10 plays a role in supporting and stabilizing the sealing arc 2. An iron sheet 11 is fixedly installed on one side of the sealing arc 2 close to the limit column 8, and a magnet 12 is fixedly installed at a position corresponding to the iron sheet 11 in the rectangular slide 6. The magnet 12 attracts the iron sheet 11 to stabilize the sealing arc 2 in the rectangular slide 6. A clamping component 3 is provided on the fixing ring 1, which is used to clamp and fix the sealing arc 2 on the fixing ring 1. A fastening component 4 is provided on the fixing ring 1. The fastening component 4 includes a fastening belt 43 fixedly installed on the fixing ring 1, which is used to fasten the cable in the fixing ring 1, so as to facilitate the installation of the fixed cable;

[0035] The fastening assembly 4 includes a mounting plate 41 fixedly mounted on both sides of the fixing ring 1 near one end of the sealing arc 2, and a winding roller 42 is rotatably mounted on the two mounting plates 41, and the winding roller 42 plays the role of winding up the fastening belt 43, and the other end of the fastening belt 43 is fixedly mounted on the winding roller 42 and wound around the winding roller 42, and a self-locking disk 44 with a triangular block 45 is rotatably mounted on the side of the mounting plate 41 away from the winding roller 42, and the triangular block 45 cooperates with the self-locking unit to drive the fastening belt 43 to further tightly wrap the cable, which is beneficial to improve the firmness of the cable installation, and a self-locking groove is provided on the self-locking disk 44, and the rotating shaft of the self-locking disk 44 slides through the mounting plate 41 It is fixedly installed on the winding roller 42, and a self-locking unit is provided on the side of the mounting plate 41 close to the self-locking disk 44, which is used to limit and lock the self-locking disk 44. A hydraulic telescopic rod 412 is fixedly installed on the end of the sealing arc 2 away from the fixed ring 1, which is used to move the fastening belt 43 to wrap the cable in the fixed ring 1, so as to further improve the fastening ability of the fastening belt 43. A fastening arc plate 413 that can spirally rise is installed in the fixed ring 1, and a bolt 414 is threadedly installed at the position of the fixed ring 1 away from the sealing arc 2. The other end of the bolt 414 is rotatably installed on the fastening arc plate 413, which is used to support the fastening belt 43 to wrap the cable, thereby further fastening the cable.

[0036] The self-locking unit includes a baffle 46 fixedly mounted on the mounting plate 41, and a guide cylinder 47 is fixedly mounted on one side of the baffle 46 close to the self-locking disk 44. The guide cylinder 47 plays the role of guiding and stabilizing the self-locking head 48, and a self-locking head 48 is slidably mounted in the guide cylinder 47. The self-locking head 48 is provided with a right-angle groove and an inclined surface at one end close to the self-locking disk 44, respectively. The right-angle groove on the self-locking head 48 cooperates with the self-locking groove to play the role of limiting and fixing the self-locking disk 44, and the inclined surface on the self-locking head 48 slides on the self-locking groove, which is convenient for the self-locking disk 44 to slide and squeeze the self-locking head 48 on the inclined surface, so that the self-locking head 48 squeezes the second spring 49 in the guide cylinder 47, so that the second spring 49 is in a compressed state, which is convenient for the fastening belt 43 to be flexibly pulled out from the winding roller 42, and the second spring 49 and the sliding rod 410 are fixedly mounted on the side of the self-locking head 48 away from the self-locking disk 44, and the end of the sliding rod 410 away from the self-locking head 48 slides through the baffle The plate 46 is fixedly mounted with a pull ring 411. Rotating the pull ring 411 drives the slide bar 410 to rotate on the baffle plate 46, and at the same time makes the slide bar 410 rotate in the self-locking head 48, which is convenient for replacing the direction of the right-angle groove and the inclined surface on the self-locking head 48, and is convenient for controlling the locking direction of the self-locking disk 44. The other end of the second spring 49 is slidably mounted on the baffle plate 46, and the second spring 49 is nested and mounted on the outer surface of the slide bar 410. The second spring 49 plays a role in driving the self-locking head 48 to elastically return and be inserted into the self-locking groove. The fixing ring 1 and the sealing arc 2 play a role in fixing the installed cable under the action of the fastening belt 43, and are easy to disassemble and reuse, convenient and flexible to use, and avoid the trouble of removing the bolts on the spare cable as much as possible, which is conducive to improving the work efficiency of maintenance personnel in installation and disassembly, improving the firmness of cable installation, reducing the maintenance cost of the cable, and improving the flexible utilization rate of the device.

[0037] For example 2, please refer to Figure 7 - Fig. 9As shown, on the basis of the first embodiment, the engaging assembly 3 includes a limiting groove 33 provided on one side of the fixing ring 1, a limiting block 31 with an engaging groove 32 is fixedly installed on the side of the sealing arc 2 close to the limiting groove 33, the limiting block 31 is inserted into the limiting groove 33, and the engaging plate 34 is inserted into the engaging groove 32 at the same time, a engaging plate 34 is slidably installed in the limiting groove 33, a button rod 36 is fixedly installed on one side of the engaging plate 34, the number of the engaging plates 34 is two, the engaging plates 34 are engaged and inserted in the engaging groove 32, and a first elastic member is fixedly installed between the two engaging plates 34 Spring 35, the end of the button rod 36 away from the first spring 35 slides through the fixing ring 1, and the button rod 36 is squeezed by the external force to squeeze the locking plate 34, so that the locking plate 34 squeezes the first spring 35, so that the first spring 35 is in a compressed state, and the locking plate 34 is disengaged from the locking groove 32, and then the sealing arc 2 is pulled, so that the sealing arc 2 can remove the limit block 31 from the locking assembly 3, which is convenient for the locking and fixing of the sealing arc 2, and the locking connection of the sealing arc 2 and the fixing ring 1, which is convenient for operation and use, is beneficial to improving the locking and fixing ability of the device, and is beneficial to improving the work efficiency of the device installation.

[0038] For example 3, please refer to Figure 1 - Figure 2 As shown, on the basis of embodiment 1 and embodiment 2, fixing components 5 are provided on both sides of the fixing ring 1 away from the mounting plate 41, the fixing component 5 includes a storage groove provided on the fixing ring 1, and a fixing plate 51 is slidably installed in the storage groove, the fixing plate 51 is convenient for driving the support plate 52 to retract into the storage groove, a handle 54 is fixedly installed on the side of the fixing plate 51 away from the fixing ring 1, the handle 54 is convenient for pulling the fixing plate 51 out of the storage groove, a mounting hole 53 is provided on the fixing plate 51, grooves 55 are provided on both sides of one end of the fixing plate 51 close to the handle 54, and a support plate 52 is rotatably installed on the side of the groove 55 close to the handle 54, the support plate 52 is convenient for retracting into the groove 55, convenient for telescopic storage, convenient and flexible operation, the support plate 52 increases the supporting area of ​​the fixing plate 51, which is beneficial to improving the stability of the fixing ring 1 placed on the ground, beneficial to improving the support stability of the device, and beneficial to improving the flexible applicability of the device.

[0039] The working principle of the present invention is as follows: when using the device, firstly, hold the handle 54 to pull the support plate 52 out of the storage groove, and then rotate the support plate 52 out of the groove 55. When the inclined surface of the self-locking head 48 faces the fastening belt 43, the cable is placed on the fastening belt 43 and falls into the fixing ring 1. At the same time, the fastening belt 43 drives the winding roller 42 to rotate, and the winding roller 42 drives the self-locking disk 44 to slide on the inclined surface of the self-locking head 48. Then, the hydraulic telescopic rod 412 is started to extend the sealing arc 2 and is under the fastening belt 43. Then, the sealing arc 2 is pulled to slide the sealing arc 2 from the rectangular slide. The sealing arc 2 drives the iron sheet 11 to separate from the magnet 12, and drives the limiting column 8 to slide in the waist-shaped slide groove 7, and the support rod 10 slides in the waist-shaped through hole 9, and drives the hydraulic telescopic rod 412 to move the winding roller 42 to the limiting groove 33, and inserts the limiting block 31 into the limiting groove 33, and inserts the compression spring of the clamping plate 34 into the clamping groove 32, and drives the fastening belt 43 to wrap the cable in the fixing ring 1, and then pulls the pull ring 411 downward, and makes the pull ring 411 pass through The slide bar 410 drives the self-locking head 48 to retract from the self-locking groove into the guide cylinder 47, and at the same time, the self-locking head 48 squeezes the second spring 49, so that the second spring 49 is in a compressed state, and then the pull ring 411 is rotated to make the pull ring 411 drive the self-locking head 48 to rotate in the guide cylinder 47 through the slide bar 410, and at the same time, the right-angle groove on the self-locking head 48 faces the fastening belt 43, and then the pull ring 411 is loosened, so that the elastic force of the second spring 49 drives the self-locking head 48 to be inserted into the self-locking groove on the self-locking disk 44, and then the triangular block 45 is twisted to make the triangular block 45 drive the self-locking disk 44 to rotate in the self-locking head 48. The self-locking disc 44 slides on the inclined surface, and at the same time, the self-locking disc 44 drives the winding roller 42 to wind up the fastening belt 43, and at the same time, the fastening belt 43 is further tightly wrapped with the assistance of the hydraulic telescopic rod 412. At the same time, when the self-locking disc 44 moves in the opposite direction, the self-locking disc 44 is stuck in the right-angle groove, limiting and stabilizing the self-locking disc 44, and finally, the bolt 414 is screwed to make the bolt 414 threadedly rotate on the fixing ring 1 to lift the fastening arc plate 413, so that the fastening arc plate 413 moves upward to support the cable wrapped by the fastening belt 43, and then the fixing ring 1 is installed at the required installation position through the installation hole 53 on the fixing plate 51.

[0040] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A power supply cable holder, comprising a fixing ring (1), characterized in that: A sealing arc (2) is slidably mounted on the fixing ring (1), a clamping assembly (3) is provided on the fixing ring (1) for clamping and fixing the sealing arc (2) on the fixing ring (1), a fastening assembly (4) is provided on the fixing ring (1), and the fastening assembly (4) comprises a fastening belt (43) fixedly mounted on the fixing ring (1) and used for fastening the cable in the fixing ring (1); The fastening assembly (4) comprises mounting plates (41) fixedly mounted on both sides of the fixing ring (1) near one end of the sealing arc (2); winding rollers (42) are rotatably mounted on the two mounting plates (41); a self-locking disk (44) with a triangular block (45) is rotatably mounted on a side of the mounting plate (41) away from the winding rollers (42); a self-locking unit is provided on a side of the mounting plate (41) close to the self-locking disk (44) for limiting and locking the self-locking disk (44); a hydraulic telescopic rod (412) is fixedly mounted on one end of the sealing arc (2) away from the fixing ring (1); the hydraulic telescopic rod (412) extends out of the sealing arc (2) and is located below the fastening belt (43) for moving the fastening belt (43) to wrap the cable in the fixing ring (1); a fastening arc plate (413) that can rise spirally is installed in the fixing ring (1) for supporting the fastening belt (43) to wrap the cable.

2. A power supply cable fixture according to claim 1, characterized in that: The self-locking unit comprises a baffle (46) fixedly mounted on a mounting plate (41); a guide cylinder (47) is fixedly mounted on a side of the baffle (46) close to the self-locking disk (44); a self-locking head (48) is slidably mounted in the guide cylinder (47); a second spring (49) and a slide rod (410) are fixedly mounted on a side of the self-locking head (48) away from the self-locking disk (44); an end of the slide rod (410) away from the self-locking head (48) slides through the baffle (46) and is fixedly mounted with a pull ring (411).

3. A power supply cable fixture according to claim 2, characterized in that: The other end of the second spring (49) is slidably mounted on the baffle (46), and the second spring (49) is nested and mounted on the outer surface of the slide rod (410). A right-angle groove and an inclined surface are respectively formed at one end of the self-locking head (48) close to the self-locking disk (44).

4. The power cable fixture according to claim 1, characterized in that: The other end of the tightening belt (43) is fixedly mounted on the winding roller (42) and is wound around the winding roller (42); the rotating shaft of the self-locking disk (44) slides through the mounting plate (41) and is fixedly mounted on the winding roller (42); a bolt (414) is threadedly mounted through a position of the fixing ring (1) away from the sealing arc (2); and the other end of the bolt (414) is rotatably mounted on the tightening arc plate (413).

5. The power cable fixture according to claim 1, characterized in that: The snap-fit ​​assembly (3) comprises a limit groove (33) formed on one side of the fixing ring (1); a limit block (31) having a snap-fit ​​groove (32) is fixedly mounted on one side of the sealing arc (2) close to the limit groove (33); a snap-fit ​​plate (34) is slidably mounted in the limit groove (33); and a button rod (36) is fixedly mounted on one side of the snap-fit ​​plate (34).

6. A power cable fixture according to claim 5, characterized in that: There are two snap-fit ​​plates (34) which are snap-fitted and inserted into the snap-fit ​​grooves (32). A first spring (35) is fixedly mounted between the two snap-fit ​​plates (34). One end of the button rod (36) away from the first spring (35) slides through the fixing ring (1).

7. The power cable fixture according to claim 1, characterized in that: A fixing assembly (5) is arranged on both sides of the fixing ring (1) away from the mounting plate (41), the fixing assembly (5) comprising a receiving groove formed on the fixing ring (1), and a fixing plate (51) is slidably mounted in the receiving groove, a handle (54) is fixedly mounted on one side of the fixing plate (51) away from the fixing ring (1), and a mounting hole (53) is formed on the fixing plate (51).

8. A power supply cable fixture according to claim 7, characterized in that: Grooves (55) are provided on both sides of the fixing plate (51) at one end close to the handle (54), and a support plate (52) is rotatably mounted on one side of the groove (55) close to the handle (54).

9. The power cable fixture according to claim 1, characterized in that: A rectangular slide groove (6) is provided at a position of the fixing ring (1) close to the mounting plate (41), the sealing arc (2) is slidably mounted in the rectangular slide groove (6), waist-shaped slide grooves (7) are provided on the inner walls on both sides of the rectangular slide groove (6), and a limiting column (8) is fixedly mounted at one end of the sealing arc (2) away from the hydraulic telescopic rod (412), and the limiting column (8) is slidably mounted in the waist-shaped slide groove (7).

10. The power cable fixture according to claim 9, characterized in that: The sealing arc (2) is provided with waist-shaped through holes (9) on both sides close to the waist-shaped slide groove (7), and a support rod (10) is fixedly installed on the inner side of one end of the waist-shaped slide groove (7) close to the hydraulic telescopic rod (412), and the support rod (10) is slidably installed in the waist-shaped through hole (9).

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