Buffer roller of power distribution control equipment

Abstract

The utility model relates to the technical field of buffer rollers, and discloses a buffer roller of power distribution control equipment, which comprises a top plate, the bottom of the top plate is fixedly connected with a fixing sleeve, the bottom of the fixing sleeve is provided with a plurality of round holes, and the interiors of the round holes are fixedly connected with guide sleeves. Sliding rods are slidably connected to the interiors of the multiple guide sleeves, the bottoms of the multiple sliding rods are fixedly connected with the same first fixing ring, a bottom plate is arranged at the bottom of the first fixing ring, the top of the first fixing ring is in threaded connection with multiple first bolts, and the bottom ends of the first bolts penetrate through the first fixing ring to be in threaded connection with the bottom plate. According to the buffer device, when the buffer device is subjected to external impact, the fixing sleeve extrudes the guide sleeve to move downwards along the sliding rod, and the spring elastically deforms to store energy, buffer and absorb shock when being stressed, and then extrudes the damper to further reduce the impact force, so that the stability of the buffer performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to buffer roller technical field especially relates to a buffer roller of distribution control equipment. BACKGROUND

[0002] Buffer roller is a kind of component that combines buffer and roller function, it is composed of buffer and roller two parts, when buffer roller is subjected to external force, the roller will roll on the corresponding track or plane, at the same time, buffer will play a role, the energy generated by external force is absorbed, converted and buffered, to reduce the impact of force.

[0003] When buffer roller is subjected to excessive impact force or high frequency impact, the buffering capacity of buffer roller reaches the limit, cannot completely effectively absorb and buffer energy, still has part of impact force to be transmitted to relevant equipment or object, influences its normal operation or causes damage, and prior art is optimized buffer design, adopts multistage buffering structure, adjusts buffering degree according to different impact situations, but in the long-term use process, when using single spring, spring fatigue, stiffness change problem occurs, leading to the unstable situation of buffering performance, and the buffering force is big or small, influence use effect. UTILITARIAN CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a buffer roller of distribution control equipment, aims at improving the problem that when using single spring in prior art, spring fatigue, stiffness change problem occurs, leading to the unstable situation of buffering performance, and the buffering force is big or small, influence use effect.

[0005] In order to realize the above purpose, the utility model adopts the following technical scheme: a buffer roller of distribution control equipment, including top plate, the bottom of top plate is fixedly connected with fixed sleeve, the bottom of fixed sleeve is equipped with multiple round holes, the inside of multiple round holes is all fixedly connected with guide sleeve, the inside of multiple guide sleeves is all slidably connected with slide rod, the bottom of multiple slide rods is all fixedly connected with same fixed ring one, the bottom of fixed ring one is provided with bottom plate, the top of fixed ring one is threadedly connected with multiple bolts one, the bottom of multiple bolts one is all penetrated fixed ring one and is threadedly connected with bottom plate, the top of bottom plate is fixedly connected with damper, the top of bottom plate is fixedly connected with spring, the bottom of bottom plate is fixedly connected with support, the inside of support is rotatably connected with wheel, the top of bottom plate is provided with protection mechanism, and the protection mechanism is used to protect damper.

[0006] As a further description of the above technical scheme:

[0007] The protection mechanism comprises a protection sleeve, the bottom of the protection sleeve is fixedly connected to the top of the bottom plate, a sliding groove is formed in the outer wall of the fixed sleeve and the inner part of the protection sleeve, a sliding strip is fixedly connected in the inner part of each of the plurality of sliding grooves in the top, a baffle is fixedly connected to the top of each of the plurality of sliding strips, and a connecting ring is fixedly connected between adjacent ones of the plurality of sliding strips.

[0008] As a further description of the above technical solution:

[0009] A threaded hole is formed in each of the four corners of the bottom of the top plate, and a bolt II is threadedly connected in each of the plurality of threaded holes.

[0010] As a further description of the above technical solution:

[0011] A plurality of positioning columns are formed in the outer wall of the wheel, and a notch is fixedly connected to the top of the top plate.

[0012] As a further description of the above technical solution:

[0013] Caps are fixedly connected to the left and right sides of the bracket, and the two caps are designed to be smooth.

[0014] As a further description of the above technical solution:

[0015] A second fixing ring is fixedly connected to the outer wall of the protection sleeve, and a reflective strip is fixedly connected to the outer wall of the second fixing ring.

[0016] As a further description of the above technical solution:

[0017] The top diameter of each of the plurality of sliding rods is greater than the bottom diameter of the guide sleeve, and the diameter of the spring is smaller than the diameter of the fixed sleeve.

[0018] As a further description of the above technical solution:

[0019] The plurality of sliding grooves are equidistantly formed in the outer wall of the fixed sleeve, and the plurality of sliding strips are equidistantly arranged.

[0020] The utility model has the advantages of the following beneficial effects:

[0021] 1、In the utility model, when an external impact is received, the fixed sleeve extrudes the guide sleeve to move downward along the sliding rod, the fixed sleeve extrudes the spring, the spring elastically deforms to store energy when under stress, the energy is released after the external force disappears, the impact is cushioned and damped, the damper inside the damper converts the kinetic energy generated by the impact into heat energy and other forms of energy, and the impact force is further reduced, so that the stability of the improved damping performance is realized.

[0022] 2. The utility model discloses a protection mechanism, when the fixed cover moves down, the protection sleeve slides outside the slide bar, and the guarantee component relative movement is stable, the baffle of the slide bar top prevents the protection sleeve from sliding out, and the connecting ring is closely connected with the slide bar, and the structural stability is enhanced, when the device moves or is impacted, the protection sleeve and internal structure can better cope, thereby realize can protect internal structure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A buffer roller of a power distribution control equipment is provided in the utility model, and the buffer roller comprises a fixed cover, a protection sleeve, a slide bar, a baffle, a connecting ring and a slide bar top.

[0024] Figure 2 A buffer roller of a power distribution control equipment is provided in the utility model, and the buffer roller comprises a fixed cover, a protection sleeve, a slide bar, a baffle, a connecting ring and a slide bar top.

[0025] Figure 3 A buffer roller of a power distribution control equipment is provided in the utility model, and the buffer roller comprises a fixed cover, a protection sleeve, a slide bar, a baffle, a connecting ring and a slide bar top.

[0026] Figure 4 A buffer roller of a power distribution control equipment is provided in the utility model, and the buffer roller comprises a fixed cover, a protection sleeve, a slide bar, a baffle, a connecting ring and a slide bar top.

[0027] Figure 5 A buffer roller of a power distribution control equipment is provided in the utility model, and the buffer roller comprises a fixed cover, a protection sleeve, a slide bar, a baffle, a connecting ring and a slide bar top.

[0028] LEGEND:

[0029] 1, top plate, 2, protection mechanism, 201, protection sleeve, 202, sliding groove, 203, slide bar, 204, baffle, 205, connecting ring, 3, fixed cover, 4, round hole, 5, guide sleeve, 6, slide rod, 7, fixed ring one, 8, bottom plate, 9, bolt one, 10, damper, 11, spring, 12, support, 13, wheel, 14, screw hole, 15, bolt two, 16, positioning column, 17, notch, 18, cap, 19, fixed ring two, 20, reflective strip. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments only are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] REFERENCE Figure 1 , Figure 3 and Figure 4The utility model provides an embodiment: a buffer roller of power distribution control equipment, including roof 1, the bottom fixedly connected with fixed sleeve 3 of roof 1 is used for providing the stable support base for the structure below, the bottom of fixed sleeve 3 is equipped with a plurality of round holes 4, and the subsequent guide sleeve 5 is provided with position for the installation of round hole 4, and the fixing of guide sleeve 5 is convenient, a plurality of round holes 4 are all fixedly connected with guide sleeve 5, and guide sleeve 5 can guide the sliding of slide bar 6, and the accuracy of the sliding of slide bar 6 is ensured, a plurality of guide sleeves 5 are all slidably connected with slide bar 6, and the sliding of slide bar 6 in guide sleeve 5 can realize the telescopic motion of structure, the bottom of a plurality of slide bars 6 is all fixedly connected with same fixed ring one 7, and fixed ring one 7 can connect a plurality of slide bars 6 together, and the integrity of structure is enhanced, the bottom of fixed ring one 7 is provided with bottom plate 8, the top of fixed ring one 7 is screwd with a plurality of bolts one 9, the bottom of a plurality of bolts one 9 is all penetrated fixed ring one 7 and is screwd with bottom plate 8, and bolt one 9 can connect fixed ring one 7 and bottom plate 8, prevent the separation of both, bottom plate 8's top is fixedly connected with damper 10, and damper 10 can effectively slow down the impact force in the movement process, and the effect of buffering and shock attenuation is played, the top of bottom plate 8 is fixedly connected with spring 11, and spring 11 can be elastically deformed when being stressed, and the energy is stored and released, and the buffering performance is further enhanced, the bottom of bottom plate 8 is fixedly connected with support 12, support 12 provides the mounting support for wheel 13, makes wheel 13 can rotate, the inside rotationally connected with wheel 13 of support 12, and wheel 13 can realize the moving function of whole device, and the position adjustment of device is convenient, and the top of bottom plate 8 is provided with protection mechanism 2, and protection mechanism 2 is used for protecting damper 10;

[0032] Specifically, the bottom of the top plate 1 is fixedly connected with a fixing sleeve 3, which provides a stable support foundation for the structure below through a reliable connection mode, so that the framework of the whole device can be stably built. The bottom of the fixing sleeve 3 is provided with a plurality of round holes 4, which are regularly distributed to provide an adaptive position for the installation of the subsequent guide sleeve 5, so as to facilitate the fixation of the guide sleeve 5 in the corresponding position. The inside of each of the plurality of round holes 4 is fixedly connected with a guide sleeve 5, and the inner wall of the guide sleeve 5 is tightly combined with a sliding rod 6, which can accurately guide the sliding direction of the sliding rod 6 during movement, effectively ensuring the accuracy of the sliding of the sliding rod 6, and avoiding adverse phenomena such as deviation or jamming. The inside of each of the plurality of guide sleeves 5 is slidably connected with a sliding rod 6, which can smoothly slide in the guide sleeve 5, and can flexibly realize the telescopic movement of the structure to meet the demand for adjusting the height or position of the device under different working conditions. The bottom of each of the plurality of sliding rods 6 is fixedly connected with a same fixing ring one 7, which is welded to connect the plurality of sliding rods 6 together, so that the sliding rods 6 can work cooperatively. The bottom of the fixing ring one 7 is provided with a bottom plate 8, and the top of the fixing ring one 7 is threadedly connected with a plurality of bolts one 9. The bottom end of each of the plurality of bolts one 9 penetrates through the fixing ring one 7 and is threadedly connected with the bottom plate 8. By tightening the bolts one 9, the fixing ring one 7 and the bottom plate 8 can be tightly connected to generate sufficient fastening force, effectively preventing the two from separating during operation of the device. The top of the bottom plate 8 is fixedly connected with a damper 10, and the damping medium inside the damper 10 can convert kinetic energy into heat energy or other forms of energy when the device is impacted, thereby effectively reducing the impact force during movement and effectively buffering and damping. The top of the bottom plate 8 is also fixedly connected with a spring 11, which will elastically deform when subjected to stress, cleverly storing energy, and releasing energy when the external force disappears, further enhancing the buffering performance. The bottom of the bottom plate 8 is fixedly connected with a support 12, which provides stable mounting support for a wheel 13 through welding, ensuring that the wheel 13 can rotate freely. The inside of the support 12 is rotatably connected with the wheel 13, which can easily realize the movement function of the whole device by virtue of its rolling characteristics, greatly facilitating the position adjustment of the device in different working scenes and improving the practicality and convenience of the device.

[0033] Referring to Figure 2 and Figure 5The protection mechanism 2 comprises a protective sleeve 201, the bottom of the protective sleeve 201 is fixedly connected to the top of the bottom plate 8, the protective sleeve 201 can protect the internal fixed sleeve 3 and the like, and the fixed sleeve 3 is prevented from being collided or abraded from outside, the outer wall of the fixed sleeve 3 and the inside of the protective sleeve 201 are both provided with a sliding groove 202, the sliding groove 202 provides a track for the sliding of a sliding strip 203, the sliding strip 203 can smoothly slide along a specific direction, the inside of the top plurality of sliding grooves 202 is fixedly connected with the sliding strip 203, the protective sleeve 201 can slide on the sliding strip 203, the top of the plurality of sliding strips 203 is fixedly connected with a baffle 204, the baffle 204 prevents the protective sleeve 201 from sliding out of the sliding strip 203, the adjacent sliding strips 203 are fixedly connected with a connecting ring 205, the connecting ring 205 can connect the plurality of sliding strips 203 into a whole, and the stability of the sliding strip 203 structure is enhanced;

[0034] Specifically, the bottom of the protective sleeve 201 is fixedly connected to the top of the bottom plate 8 in a welding manner, which can comprehensively protect the internal fixed sleeve 3 and the like, and effectively prevent the fixed sleeve 3 from being collided or abraded from outside in a complex working environment, thereby greatly prolonging the service life of the related structure, the outer wall of the fixed sleeve 3 and the inside of the protective sleeve 201 are both provided with a sliding groove 202, the sliding groove 202 provides a special track for the sliding of a sliding strip 203, the protective sleeve 201 slides outside the sliding strip 203, and the stability of relative movement between components is ensured, the inside of the top plurality of sliding grooves 202 is fixedly connected with the sliding strip 203 in a welding or other adaptive manner, so that the protective sleeve 201 can stably slide on the sliding strip 203, position adjustment within a certain range is realized, the top of the plurality of sliding strips 203 is fixedly connected with a baffle 204, the protective sleeve 201 is effectively prevented from sliding out of the sliding strip 203, the integrity of the overall structure is ensured, and the adjacent sliding strips 203 are fixedly connected with a connecting ring 205, the connecting ring 205 tightly connects the plurality of sliding strips 203 into a whole, and the stability of the sliding strip 203 structure is significantly enhanced.

[0035] Referring to Figure 1 and Figure 3 The bottom of the top plate 1 is provided with a threaded hole 14 at each of the four corners, the threaded hole 14 provides a connection position for the installation of a bolt two 15, the bolt two 15 can be used to stably connect the top plate 1 with other components, the inside of the plurality of threaded holes 14 is threadedly connected with the bolt two 15, the bolt two 15 can be used to reliably fix the top plate 1 with the related components by cooperating with the threaded hole 14, the outer wall of the wheel 13 is provided with a plurality of positioning columns 16, the positioning columns 16 can be used to position in the installed state, the top of the top plate 1 is fixedly connected with a notch 17, the friction with the ground is increased, the left and right sides of the support 12 are fixedly connected with caps 18, the two caps 18 are designed in a smooth manner, the smooth caps 18 can avoid scratching surrounding objects or personnel during use, and the caps 18 can be used to play a safety protection role.

[0036] Specifically, the bottom four corners of the top plate 1 are provided with threaded holes 14, which are accurately positioned and symmetrically distributed. The existence of the threaded holes 14 provides a very suitable connection position for the installation of the second bolts 15. By screwing the second bolts 15 into the threaded holes 14, the stable connection of the top plate 1 with other components can be easily achieved, greatly enhancing the bonding strength between the parts of the device. The inside of each threaded hole 14 is tightly screwed with a second bolt 15. The second bolt 15, in cooperation with the threaded hole 14, reliably ensures the secure fixing of the top plate 1 and related components. The outer wall of the wheel 13 is provided with a plurality of positioning columns 16. During the installation process of the device, the positioning columns 16 can cooperate with the corresponding positioning grooves or structures to achieve precise positioning, ensuring the accurate installation position of the wheel 13. The top of the top plate 1 is fixedly connected with a slot 17. When the device is placed close to the ground, the slot 17 can effectively increase the contact area with the ground, thereby increasing the friction and preventing accidental sliding of the device. The left and right sides of the bracket 12 are fixedly connected with caps 18. Both caps 18 are designed with a smooth surface, which can avoid scratching surrounding objects or personnel during daily use, effectively playing a safety protection role.

[0037] Referring to Figure 1 , Figure 4 and Figure 5 , the outer wall of the protective sleeve 201 is fixedly connected with a second fixing ring 19, which enhances the structural strength of the protective sleeve 201. The outer wall of the second fixing ring 19 is fixedly connected with a reflective strip 20, which can reflect light under light irradiation, playing a warning role and facilitating the identification of the device position in a dim environment. The top diameter of the plurality of sliding rods 6 is greater than the bottom diameter of the guide sleeve 5, which can prevent the sliding rods 6 from coming out of the guide sleeve 5 and ensure the safety of the sliding rods 6 sliding in the guide sleeve 5. The diameter of the spring 11 is smaller than the diameter of the fixed sleeve 3, so that the spring 11 can normally stretch and contract in the fixed sleeve 3. A plurality of sliding grooves 202 are equally spaced on the outer wall of the fixed sleeve 3. The equally spaced sliding grooves 202 can make the sliding of the sliding bars 203 more stable and facilitate the installation and positioning of the sliding bars 203 at different positions. A plurality of sliding bars 203 are equally spaced. The equally spaced sliding bars 203 can make the force on the connected baffle 204 and other components uniform, ensuring the stability during movement.

[0038] Specifically, the outer wall of the protective sleeve 201 is fixedly connected with a fixed ring two 19, which surrounds the outer wall of the protective sleeve 201, enhances the structural strength of the protective sleeve 201, and enables the protective sleeve 201 to maintain a good shape when facing complex environments and external force impact, thereby continuously providing reliable protection for the internal structure. The outer wall of the fixed ring two 19 is fixedly connected with a reflective strip 20. When light shines on the reflective strip 20, the light can be efficiently reflected, forming a conspicuous mark in a dim environment, thereby playing a significant warning role and facilitating the operator to quickly identify the position of the device and effectively avoid accidents such as collision. The diameters of the top portions of the plurality of sliding rods 6 are greater than the diameter of the bottom portion of the guide sleeve 5, which can prevent the sliding rods 6 from being pulled out of the guide sleeve 5, thereby ensuring the safety of the sliding rods 6 when sliding in the guide sleeve 5 and making the extension and contraction of the structure more reliable. The diameter of the spring 11 is smaller than the diameter of the fixed sleeve 3, so that the spring 11 can freely and normally extend and contract in the fixed sleeve 3. When the device is impacted, the spring 11 fully exhibits its energy storage and release characteristics, thereby cooperating with the damper 10 to improve the buffering effect. The plurality of sliding grooves 202 are equally spaced on the outer wall of the fixed sleeve 3. This equal spacing design provides a stable track for the sliding of the sliding strips 203 and facilitates the accurate installation and positioning of the sliding strips 203 at different positions. The plurality of sliding strips 203 are also equally spaced, which ensures that the components such as the baffles 204 connected thereto are uniformly stressed during movement, thereby ensuring the stability of the movement process and improving the operation quality of the entire device.

[0039] Working principle: when the device is impacted by external force, the fixed sleeve 3 extrudes the guide sleeve 5 to move downward along the sliding rod 6, the inside top portion of the fixed sleeve 3 extrudes the spring 11, which elastically deforms to store energy when stressed, and releases the energy after the external force disappears, thereby buffering and damping. Then the spring 11 extrudes the damper 10, and the damping medium inside the damper 10 converts the kinetic energy generated by the impact into heat energy or other forms of energy, thereby further reducing the impact force. The fixed ring one 7 and the bottom plate 8 are tightly connected by the bolts one 9, which ensures stable connection and prevents separation during device operation, thereby greatly improving the practicality and convenience of the device.

[0040] In a complex work environment, the protective sleeve 201 can effectively prevent the fixed sleeve 3 from being impacted or worn, thereby greatly prolonging the service life of the structure. When the fixed sleeve 3 moves downward, the protective sleeve 201 slides outside the sliding strip 203, ensuring stable relative movement of the components. The baffles 204 at the top of the sliding strip 203 prevent the protective sleeve 201 from sliding out, thereby ensuring the structural integrity. The connecting rings 205 between adjacent sliding strips 203 tightly connect the sliding strips 203, thereby enhancing the structural stability. When the device moves or is impacted, the protective sleeve 201 and the internal structure can better cope with the situation and cooperate with other components to maintain normal operation of the equipment.

[0041] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, the made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A buffer roller of a power distribution control device comprising a top plate (1), characterized in that: The bottom of the top plate (1) is fixedly connected with a fixing sleeve (3), a plurality of circular holes (4) are arranged in the bottom of the fixing sleeve (3), a plurality of guide sleeves (5) are fixedly connected in the plurality of circular holes (4), a plurality of sliding rods (6) are slidingly connected in the plurality of guide sleeves (5), the same fixing ring one (7) is fixedly connected to the bottom of the plurality of sliding rods (6), the bottom of the fixing ring one (7) is provided with a bottom plate (8), a plurality of bolts one (9) are threadedly connected to the top of the fixing ring one (7), the bottom ends of the plurality of bolts one (9) are threadedly connected with the bottom plate (8) penetrating the fixing ring one (7), the top of the bottom plate (8) is fixedly connected with a damper (10), the top of the bottom plate (8) is fixedly connected with a spring (11), the bottom of the bottom plate (8) is fixedly connected with a support (12), the inside of the support (12) is rotatably connected with a wheel (13), the top of the bottom plate (8) is provided with a protection mechanism (2), and the protection mechanism (2) is used for protecting the damper (10).

2. A buffer roller for a power distribution control apparatus according to claim 1, wherein: The protection mechanism (2) comprises a protection sleeve (201), the bottom of the protection sleeve (201) is fixedly connected to the top of the bottom plate (8), the outer wall of the fixing sleeve (3) and the inside of the protection sleeve (201) are both provided with a sliding groove (202), the inside of the plurality of sliding grooves (202) is fixedly connected with a sliding bar (203), the top of the plurality of sliding bars (203) is fixedly connected with a baffle (204), and the adjacent sliding bars (203) are fixedly connected with a connecting ring (205).

3. The buffer roller of a power distribution control apparatus according to claim 1, wherein: The bottom of the top plate (1) is fixedly connected with a fixing sleeve (3), a plurality of circular holes (4) are arranged in the bottom of the fixing sleeve (3), a plurality of guide sleeves (5) are fixedly connected in the plurality of circular holes (4), a plurality of sliding rods (6) are slidingly connected in the plurality of guide sleeves (5), the same fixing ring one (7) is fixedly connected to the bottom of the plurality of sliding rods (6), the bottom of the fixing ring one (7) is provided with a bottom plate (8), a plurality of bolts one (9) are threadedly connected to the top of the fixing ring one (7), the bottom ends of the plurality of bolts one (9) are threadedly connected with the bottom plate (8) penetrating the fixing ring one (7), the top of the bottom plate (8) is fixedly connected with a damper (10), the top of the bottom plate (8) is fixedly connected with a spring (11), the bottom of the bottom plate (8) is fixedly connected with a support (12), the inside of the support (12) is rotatably connected with a wheel (13), the top of the bottom plate (8) is provided with a protection mechanism (2), and the protection mechanism (2) is used for protecting the damper (10).

4. The buffer roller for a power distribution control apparatus of claim 1, wherein: The outer wall of the wheel (13) is provided with a plurality of positioning columns (16), and the top of the top plate (1) is fixedly connected with a slot (17).

5. The buffer roller of a power distribution control apparatus according to claim 1, wherein: The left and right sides of the support (12) are both fixedly connected with a cap (18), and the two caps (18) are both designed as round and smooth.

6. A buffer roller for a power distribution control apparatus according to claim 2, wherein: The outer wall of the protection sleeve (201) is fixedly connected with a fixing ring two (19), and the outer wall of the fixing ring two (19) is fixedly connected with a reflective strip (20).

7. The buffer roller of a power distribution control apparatus according to claim 1, wherein: The diameters of the plurality of sliding rods (6) are greater than the diameters of the plurality of guide sleeves (5), and the diameter of the spring (11) is smaller than the diameter of the fixing sleeve (3).

8. The buffer roller of a power distribution control apparatus according to claim 2, wherein: The plurality of sliding grooves (202) are equidistantly arranged on the outer wall of the fixing sleeve (3), and the plurality of sliding bars (203) are equidistantly arranged.

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