Wiring device for hospital electric power engineering

Abstract

The invention discloses a wiring device for hospital electric power engineering, and particularly relates to the field of cable maintenance, the wiring device comprises a bearing mechanism, a fixed traction mechanism is slidably mounted in the bearing mechanism, an adjusting mechanism is in threaded connection with the interior of the bearing mechanism, a lifting mechanism is fixedly connected to the bottom of the bearing mechanism, and the bearing mechanism comprises a limiting frame. And the two sides of the limiting frame are fixedly provided with balancing tables, the limiting frame and the balancing tables are internally provided with first sliding grooves, the fixed traction mechanism at least comprises two first sliding blocks which are slidably installed in the first sliding grooves, the tops of the two first sliding blocks are fixedly provided with supporting plates, and the supporting plates are internally provided with circular grooves which are formed in a penetrating mode. By arranging the two first sliding blocks capable of adjusting the distance and the supporting plate as a whole, the two broken portions of each cable are limited and lifted, when the two first sliding blocks get close to each other, the two cables can be synchronously pulled to get close to each other, and connection, maintenance and use are more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of cable maintenance, and more particularly to a wiring device for hospital power engineering. Background Art

[0002] With the rapid development of the communications industry, wires and cables have evolved from simple telephone and telegraph cables to thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even combined communications cables. These products are typically small and uniform in size, requiring high manufacturing precision. Wires and cables are used to transmit electrical (magnetic) energy, information, and electromagnetic energy conversion. In a broad sense, wires and cables are also simply referred to as cables. In a narrower sense, cables refer to insulated cables, which can be defined as a collection of the following components: one or more insulated wire cores, each of which may have a sheath, protective layer, and outer sheath. Cables may also have additional uninsulated conductors.

[0003] Chinese patent CN201810839767.1 discloses a cable rack for power cable maintenance, including a base, a first groove is opened on the right side of the upper surface of the base, a stepper motor is fixedly connected to the left side of the bottom surface of the first groove, the output end of the stepper motor is fixedly connected to the driving gear, the left side of the upper surface of the base is fixedly connected to the fixed seat, the right side of the fixed seat is rotatably connected to the lead screw, the left side of the surface of the lead screw is fixedly sleeved with the driven gear, the right end of the surface of the lead screw is screwed with a nut, and one end of the connecting rod is hinged on the upper surface of the nut, the upper surface of the fixed seat is fixedly connected to the fixing rod, the surface of the fixing rod is slidably sleeved with a sliding ring, the upper surface of the sliding ring is fixedly connected to a fixing claw on the right side, the inner side surface of the fixing claw is laterally rotatably connected to the first rotating shaft, and the surface of the first rotating shaft is fixedly sleeved with a supporting wheel. By adding a fixing rod, a sliding ring, a lead screw and a connecting rod to the base, the fixed claw can lift the cable, thereby achieving the purpose of facilitating maintenance for cable maintenance personnel.

[0004] However, when a portion of the outer wall of the cable is broken, it is often necessary to use the two ends of the broken cable to repair and connect them. However, when the cable is connected on a rack, it is often in the air, which leads to the problem of the cable falling down during the repair process, making it very inconvenient to connect the cables during maintenance. Therefore, the present invention proposes a wiring device for hospital power engineering to solve the above problem. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a wiring device for hospital power engineering. By setting two first sliders and a support plate that can be adjusted in distance, the two broken sections of the cable can be limited and supported, and when the two first sliders are brought close to each other, the two cables can be pulled closer to each other synchronously to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a wiring device for hospital power engineering, comprising a supporting mechanism, a fixed traction mechanism slidably mounted inside the supporting mechanism, an adjustment mechanism threadedly connected to the interior of the supporting mechanism, and a lifting mechanism fixedly connected to the bottom of the supporting mechanism; The support mechanism includes a limit frame, and a balance platform is fixedly installed on both sides of the limit frame, and a first slide groove is provided in the interior of the limit frame and the balance platform. The fixed traction mechanism includes at least two first sliders slidably installed in the first slide groove, and the tops of the two first sliders are fixedly installed with a support plate, and the interior of the support plate is provided with a circular groove arranged in a through shape, and the inner cavity of the circular groove is fixedly installed with a limit block, and the outer wall of the limit block is provided with an annular groove, and the interior of the limit block is provided with a through groove, and the inner cavity of the through groove is fixedly installed with a supporting tray, and a sliding rod is slidably installed in the interior of the supporting tray, and one end of the sliding rod is fixedly connected to the limiting ball.

[0007] In a preferred embodiment, a rotating rod is rotatably installed on the top of the supporting tray, a turntable is fixedly installed on the outer wall of the rotating rod, two second arc-shaped grooves are arranged in a through shape on the top of the turntable, and the first limiting rod fixedly connected to the sliding rod is slidably installed inside the two second arc-shaped grooves.

[0008] In a preferred embodiment, a first gear is fixedly mounted on one end of the rotating rod extending out of the top of the support plate, a second gear is engaged with the outer wall of the first gear, and a motor for driving the second gear to rotate is fixedly connected to the top.

[0009] In a preferred embodiment, a lifting frame is fixedly installed on the top of the two balancing platforms, and a first arc-shaped groove arranged in a through shape is opened on both sides of the lifting frame. An L-shaped rotating plate is rotatably installed in the inner cavity of the first arc-shaped groove, and a limiting cylinder is fixedly installed on the bottom of the lifting frame. The inner cavity of the limiting cylinder is plugged with an arc-shaped bracket, and a telescopic spring is fixedly installed between the arc-shaped bracket and the limiting cylinder.

[0010] In a preferred embodiment, the adjustment mechanism includes a trapezoidal block arranged inside the limit frame, and a second slide groove is fixedly installed on both sides of the trapezoidal block. A first threaded screw that engages with the limit frame is rotatably installed on the bottom of the trapezoidal block, a limit slide bar is fixedly installed on one side of the first slider, and the second slide groove is slidably installed inside the limit slide bar.

[0011] In a preferred embodiment, the lifting mechanism includes an internally threaded sleeve fixedly mounted on the bottom of the limit frame, and the internally threaded sleeve is engaged with the outer wall of the first threaded screw, one side of the internally threaded sleeve is hingedly connected to a first support frame, both sides of the first support frame are rotatably connected to a second support frame, one side of the second support frame is hingedly connected to a limit base, and the limit base is sleeved on the outer wall of the first threaded screw; The first support frame and the second support frame are arranged in a mutually crossed state, and the hinge point of the first support frame and the second support frame is arranged at the vertical center line position of the two.

[0012] In a preferred embodiment, a supporting plate is fixedly mounted on the bottom of the limiting base, a limiting clamp is fixedly mounted on one side of the supporting plate, and a threaded pressure rod is threadedly connected to the top of the limiting clamp.

[0013] In a preferred embodiment, a second slider slidably connected to the support plate is hingedly connected to a side of the first support frame away from the internally threaded sleeve, a second limiting rod is fixedly mounted on the top of the second slider, and a sliding sleeve hinged to the second support frame is slidably mounted on the outer wall of the second limiting rod; A second threaded screw is rotatably mounted on the bottom of the supporting plate, and the second sliding block is engaged with the outer wall of the second threaded screw.

[0014] Technical effects and advantages of the present invention: 1. The present invention provides two first sliders and a support plate integrally configured to be able to adjust the distance, and allows the broken cable to be fixed between the circular groove and the annular groove provided inside the corresponding support plate. This allows the two broken sections of the cable to be simultaneously limited and lifted. When the two first sliders are brought close to each other, the two cables can be simultaneously pulled close to each other, thereby making it easier to connect the two cables simultaneously for use. 2. The present invention presses down the entire arc-shaped bracket to contract the telescopic spring, and at the same time, exerts pressure on the L-shaped rotating plate to flip it over, and then engages with the outer wall of the cable to limit and lift the broken cable again, thereby alleviating the force of the circular groove and the annular groove on the cable, and enhancing the stability of the circular groove and the annular groove in clamping and fixing the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a partial structural diagram of the supporting mechanism and the lifting mechanism of the present invention.

[0017] Figure 3 For the present invention Figure 2 A magnified view of the structure of part A.

[0018] Figure 4It is a cross-sectional view of the internal structure of the lifting frame of the present invention.

[0019] Figure 5 It is a schematic diagram of the partial structure of the fixed traction mechanism of the present invention.

[0020] Figure 6 It is a partial structural sectional view of the fixed traction mechanism of the present invention.

[0021] Figure 7 For the present invention Figure 6 Enlarged view of the B structure.

[0022] The accompanying drawings are marked as follows: 1 supporting mechanism, 101 limiting frame, 102 balancing platform, 103 first slide, 104 lifting frame, 105 first arc groove, 106 L-shaped rotating plate, 107 limiting cylinder, 108 arc bracket, 109 telescopic spring, 2 fixed traction mechanism, 21 first slider, 22 supporting plate, 23 circular groove, 24 limiting block, 25 annular groove, 26 through groove, 27 bearing tray, 28 sliding rod, 29 limiting ball, 210 rotating rod, 211 turntable, 21 2 second arc groove, 213 limiting rod, 214 first gear, 215 second gear, 216 motor, 217 limiting slide, 3 adjustment mechanism, 31 trapezoidal block, 32 second slide groove, 33 first threaded screw, 4 lifting mechanism, 41 internal threaded sleeve, 42 first support bracket, 43 second support bracket, 44 limiting base, 45 supporting plate, 46 second slider, 47 limiting rod, 48 sliding sleeve, 49 second threaded screw, 410 limiting clamp, 411 threaded pressure rod. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0024] Refer to the instruction manual Figure 1-7 , a wiring device for hospital power engineering according to an embodiment of the present invention, such as Figure 1 As shown, it includes a supporting mechanism 1, a fixed traction mechanism 2 is slidably installed inside the supporting mechanism 1, an adjustment mechanism 3 is threadedly connected to the inside of the supporting mechanism 1, and a lifting mechanism 4 is fixedly connected to the bottom of the supporting mechanism 1; Reference Figure 2-3 As shown, the supporting mechanism 1 includes a limit frame 101, and a balancing platform 102 is fixedly installed on both sides of the limit frame 101. The interiors of the limit frame 101 and the balancing platform 102 are both provided with a first sliding groove 103. Figure 5As shown, the fixed traction mechanism 2 includes at least two first sliders 21 slidably mounted inside the first slide groove 103, and a support plate 22 is fixedly mounted on the top of the two first sliders 21. A circular groove 23 is provided in the interior of the support plate 22. A limit block 24 is fixedly mounted in the inner cavity of the circular groove 23. The outer wall of the limit block 24 is provided with an annular groove 25. Figure 6-7 When the two broken cables are passed through the annular groove 25 and the circular groove 23 in sequence, the sliding rod 28 is extended toward the outer wall of the supporting tray 27, so that the limiting ball 29 can be moved toward the inside of the circular groove 23 and then pressed against the outer wall of the cable, so that the broken part of the cable can be limited and lifted on the one hand, avoiding the problem of the cable drooping and affecting the actual use. On the other hand, the broken position of the cable can be stably limited. Then, when the two first sliders 21 are brought close to each other, the two cables can be pulled close to each other synchronously, thereby making it easier to connect the two cables for maintenance.

[0025] As a further expansion of this solution, when the positions of the two slide bars 28 and the limiting balls 29 need to be adjusted and fixed, refer to Figure 7 As shown, a rotating rod 210 is rotatably installed on the top of the supporting tray 27, and a rotating disk 211 is fixedly installed on the outer wall of the rotating rod 210. Two second arc-shaped grooves 212 are arranged in a through-shaped manner on the top of the rotating disk 211, and the first limiting rod 213 fixedly connected to the slide rod 28 is slidably installed inside the two second arc-shaped grooves 212. The purpose of this arrangement is that the second arc-shaped groove 212 can be displaced by rotating the rotating disk 211 as a whole, and then the first limiting rod 213 drives the slide rod 28 and the limiting ball 29 to slide in translation as a whole inside the supporting tray 27. At the same time, the rotating rod 210 extends out of the top of the support plate 22 A first gear 214 is fixedly installed at one end, and a second gear 215 is engaged with the outer wall of the first gear 214. The top of the second gear 215 is fixedly connected to a motor 216 for driving it to rotate. In actual use, by starting the motor 216 to drive the second gear 215 to rotate, the first gear 214 drives the rotating rod 210 and the turntable 211 to rotate as a whole, and then the first limiting rod 213 performs a translational movement around the inner cavity of the second arc groove 212, thereby controlling and driving the position of the limiting ball 29 to move out, thereby making it more convenient to fix the cable and more convenient for actual use.

[0026] Further, combined Figure 4As shown, the tops of the two balancing platforms 102 are fixedly installed with a lifting frame 104, and both sides of the lifting frame 104 are provided with a first arc-shaped groove 105 arranged in a through-shaped manner. The inner cavity of the first arc-shaped groove 105 is rotatably installed with an L-shaped rotating plate 106, and the bottom of the lifting frame 104 is fixedly installed with a limiting cylinder 107. The inner cavity of the limiting cylinder 107 is plugged with an arc-shaped bracket 108, and a telescopic spring 109 is fixedly installed between the arc-shaped bracket 108 and the limiting cylinder 107. The purpose of this arrangement is to make it possible to pass the cable through the circular groove 23 and the annular groove 23. Before entering the groove 25, the cable can be placed on the top of the arc bracket 108, and the telescopic spring 109 can be contracted by pressing down the arc bracket 108 as a whole, thereby causing the arc bracket 108 to move downward as a whole, and at the same time, pressure is exerted on the L-shaped turning plate 106, thereby causing the L-shaped turning plate 106 to flip over as a whole, until the L-shaped turning plate 106 is limited and engaged with the outer wall of the cable. The broken cable can be limited and lifted again to avoid the cable being placed drooping and affecting the stability of the cable limit fixation at the circular groove 23 and the annular groove 25.

[0027] As a further extension of this scheme, refer to Figure 2-3 As shown, the adjustment mechanism 3 includes a trapezoidal block 31 arranged inside the limit frame 101, and second slide grooves 32 are fixedly installed on both sides of the trapezoidal block 31. A first threaded screw rod 33 engaged with the limit frame 101 is rotatably installed at the bottom of the trapezoidal block 31. Figure 5 As shown, a limit slide 217 is fixedly installed on one side of the first slider 21, and the second slide groove 32 is slidably installed inside the limit slide 217. Under normal circumstances, the two first sliders 21 are symmetrically arranged about the vertical center line of the trapezoidal block 31, and the trapezoidal block 31 is arranged at the bottom of the inner cavity of the limit frame 101. At this time, the two first sliders 21 drive the corresponding support plates 22 to be farther apart as a whole. In actual use, by turning the first threaded screw 33 to make the trapezoidal block 31 move upward as a whole, the two first sliders 21 can drive the support plates 22 to gradually close the distance between the whole. After the two ends of the broken cable are fixed and limited inside the corresponding support plates 22, the distance between the two support plates 22 is close, and the two cables can be pulled and brought close together synchronously, which is more convenient for subsequent connection and use, and avoids the problem of being unable to connect synchronously due to the high position of the cable.

[0028] Further, refer to Figure 2-3As shown, the lifting mechanism 4 includes an internal threaded sleeve 41 fixedly mounted on the bottom of the limit frame 101, and the internal threaded sleeve 41 is engaged with the outer wall of the first threaded screw rod 33, and a first support 42 is hinged on one side of the internal threaded sleeve 41, and the second support 43 is rotatably connected to the two sides of the first support 42, and a limited base 44 is hinged on one side of the second support 43, and the limited base 44 is sleeved on the outer wall of the first threaded screw rod 33, wherein the first support 42 and the second support 43 are arranged in a mutually crossing state, and the hinge point of the first support 42 and the second support 43 is arranged at the vertical center line position of the two. The purpose of such arrangement is to make the angle between the first support 42 and the second support 43 change synchronously when the first support 42 or the second support 43 is deflected and moved, and then when the position of the limit base 44 remains unchanged, the overall height of the internal threaded sleeve 41 and the limit frame 101 can be changed and adjusted, so that it is suitable for use in different height states, thereby enhancing the practicality of the device. At the same time, with reference to Figure 3 As shown, a support plate 45 is fixedly installed at the bottom of the limiting base 44, combined with Figure 2 As shown, a limit clamp 410 is fixedly installed on one side of the support plate 45, and the top of the limit clamp 410 is threadedly connected to a threaded pressure rod 411. In actual use, the limit clamp 410 can be clamped on the lifting frame through the threaded pressure rod 411, so that the limit frame 101 as a whole extends to the outside of the lifting platform, thereby limiting and lifting the cables at a position where it is inconvenient for the lifting platform to move.

[0029] Further, refer to Figure 3 As shown, the first bracket 42 is hinged on one side away from the internal threaded sleeve 41 with a second slider 46 that is slidably connected to the supporting plate 45. A second limiting rod 47 is fixedly installed on the top of the second slider 46. The outer wall of the second limiting rod 47 is slidably installed with a sliding sleeve 48 that is hinged to the second bracket 43. In actual use, by sliding the second slider 46, when the inclination angle of the first bracket 42 changes, the inclination angle of the synchronized second bracket 43 changes synchronously, and the sliding sleeve 48 slides on the outer wall of the second limiting rod 47 for auxiliary limiting, so that the mutually crossed second brackets 43 are The angle adjustment between the first bracket 42 and the second bracket 43 is more stable and smooth. At the same time, a second threaded screw 49 is rotatably installed on the bottom of the supporting plate 45, and the second slider 46 is engaged with the outer wall of the second threaded screw 49. The purpose of this arrangement is that by rotating the second threaded screw 49 as a whole, the second slider 46 can be driven to perform translational movement on its outer wall, and then the second slider 46 slides inside the supporting plate 45, thereby achieving the purpose of stably adjusting the inclination angle between the first bracket 42 and the second bracket 43, which is more convenient to use and more suitable for practical use.

[0030] A wiring method for a wiring device for hospital power engineering, the specific steps are as follows: In the first step, the limit clamp 410 is clamped on the external lifting platform and locked by rotating the threaded pressure rod 411; In the second step, by rotating the second threaded screw 49, the second slider 46 drives the first bracket 42 and the second limiting rod 47 to shift their overall positions, thereby changing the tilt angle between the first bracket 42 and the second bracket 43, and then changing the height of the internally threaded sleeve 41 until the overall height of the limiting frame 101 moves to the bottom of the broken cable line; The third step is to sequentially engage the broken cable wires in the interior of the support frame 104 and pass them through the circular groove 23 and the annular groove 25 so that the broken part of the cable wires is limited and supported. In the fourth step, the motor 216 is started to rotate the second gear 215 and the first gear 214, which in turn rotates the turntable 211, thereby driving the slide bar 28 to extend the limiting ball 29 outward until the cable is fixedly clamped between the circular groove 23 and the annular groove 25. In the fifth step, the trapezoidal block 31 is moved upward as a whole by rotating the first screw rod 33, and then the two first sliders 21 drive the support plate 22 to pull the broken cable closer to each other, so that the cable can be repaired and connected quickly and conveniently.

[0031] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change. Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wiring device for hospital power engineering, comprising a supporting mechanism (1), a fixed traction mechanism (2) being slidably mounted inside the supporting mechanism (1), an adjustment mechanism (3) being threadedly connected to the inside of the supporting mechanism (1), and a lifting mechanism (4) being fixedly connected to the bottom of the supporting mechanism (1); Its characteristics are: The supporting mechanism (1) includes a limit frame (101), a balancing platform (102) is fixedly installed on both sides of the limit frame (101), a first slide groove (103) is provided inside the limit frame (101) and the balancing platform (102), and the fixed traction mechanism (2) includes at least two first sliders (21) slidably installed inside the first slide groove (103), and a support plate (22) is fixedly installed on the top of the two first sliders (21), a circular groove (23) arranged in a through shape is provided inside the support plate (22), a limit block (24) is fixedly installed in the inner cavity of the circular groove (23), an annular groove (25) is provided on the outer wall of the limit block (24), a through groove (26) is provided inside the limit block (24), a support tray (27) is fixedly installed in the inner cavity of the through groove (26), a slide rod (28) is slidably installed inside the support tray (27), and one end of the slide rod (28) is fixedly connected to the limit ball (29).

2. A wiring device for hospital power engineering according to claim 1, characterized in that: A rotating rod (210) is rotatably mounted on the top of the supporting tray (27), a rotating disc (211) is fixedly mounted on the outer wall of the rotating rod (210), two second arc-shaped grooves (212) arranged in a through-shape are opened on the top of the rotating disc (211), and first limiting rods (213) fixedly connected to the sliding rod (28) are slidably mounted inside the two second arc-shaped grooves (212).

3. A wiring device for hospital power engineering according to claim 2, characterized in that: A first gear (214) is fixedly mounted on one end of the rotating rod (210) extending from the top of the support plate (22); a second gear (215) is meshed with an outer wall of the first gear (214); and a motor (216) is fixedly connected to the top of the second gear (215) for driving the second gear (215) to rotate.

4. A wiring device for hospital power engineering according to claim 3, characterized in that: A lifting frame (104) is fixedly installed on the top of the two balancing platforms (102), and a first arc-shaped groove (105) arranged in a through-shaped manner is opened on both sides of the lifting frame (104), and an L-shaped rotating plate (106) is rotatably installed in the inner cavity of the first arc-shaped groove (105). A limiting cylinder (107) is fixedly installed on the bottom of the lifting frame (104), and an arc-shaped bracket (108) is inserted into the inner cavity of the limiting cylinder (107), and a telescopic spring (109) is fixedly installed between the arc-shaped bracket (108) and the limiting cylinder (107).

5. A wiring device for hospital power engineering according to claim 4, characterized in that: The adjustment mechanism (3) comprises a trapezoidal block (31) arranged inside a limit frame (101), second slide grooves (32) are fixedly installed on both sides of the trapezoidal block (31), a first threaded screw (33) engaged with the limit frame (101) is rotatably installed at the bottom of the trapezoidal block (31), a limit slide bar (217) is fixedly installed on one side of the first slider (21), and the second slide groove (32) is slidably installed inside the limit slide bar (217).

6. A wiring device for hospital power engineering according to claim 5, characterized in that: The lifting mechanism (4) includes an internal threaded sleeve (41) fixedly mounted on the bottom of the limit frame (101), and the internal threaded sleeve (41) is engaged with the outer wall of the first threaded screw (33), one side of the internal threaded sleeve (41) is hinged with a first support frame (42), both sides of the first support frame (42) are rotatably connected to the second support frame (43), one side of the second support frame (43) is hinged with a limit base (44), and the limit base (44) is sleeved on the outer wall of the first threaded screw (33); The first support frame (42) and the second support frame (43) are arranged in a mutually crossed state, and the hinge point of the first support frame (42) and the second support frame (43) is arranged at the vertical center line position of the two.

7. A wiring device for hospital power engineering according to claim 6, characterized in that: A supporting plate (45) is fixedly mounted on the bottom of the limiting base (44), a limiting clamp (410) is fixedly mounted on one side of the supporting plate (45), and a threaded pressure rod (411) is threadedly connected to the top of the limiting clamp (410).

8. A wiring device for hospital power engineering according to claim 7, characterized in that: A second slider (46) slidably connected to the support plate (45) is hingedly connected to the side of the first support frame (42) away from the internal threaded sleeve (41); a second limiting rod (47) is fixedly installed on the top of the second limiting rod (46); and a sliding sleeve (48) hinged to the second support frame (43) is slidably installed on the outer wall of the second limiting rod (47); A second threaded screw (49) is rotatably mounted on the bottom of the supporting plate (45), and the second slider (46) is engaged with the outer wall of the second threaded screw (49).

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