CN212503299U - Disc brake type cable releaser - Google Patents

Abstract

The utility model relates to a dish formula cable releaser of stopping, include from up support bedplate, dish brake piece and the top bearing plate of parallel arrangement in proper order down, the outside end of supporting the bedplate is installed and is used for stopping the calliper with dish that the piece matched with dish stops, the bottom and the support bedplate rotation of dish brake piece are connected, and the top bearing plate of dish brake piece connect firmly, the middle part of top bearing plate connects firmly that has vertical setting and is used for running through the connecting rod in cable dish hole. The utility model has the advantages of reasonable design, convenient to use, it cooperatees with the dish piece of stopping to stop through the dish calliper of stopping, is convenient for brake the unwrapping wire of cable dish, effectively avoids causing the cable pine to take off the condition emergence on ground because of cable dish rotational speed too soon.

Description

Disc brake type cable releaser

The technical field is as follows:

the utility model relates to a dish formula cable releaser of stopping.

Background art:

the cable releasing frame is used for cable paying-off, the cable reel is sleeved on the paying-off releasing frame during use, the cable head of the cable can be pulled to pay-off, and the cable releasing frame is widely applied to the power industry. However, the existing cable release rack is unreasonable in design, difficult to use, low in safety and limited; and because the existing cable release frame is lack of a braking device, namely if the cable release frame is not braked in time, the rotating speed of the cable disc is too high, the cable disc can continuously rotate and continuously release the cable on the cable disc, the cable falls to the ground, and the releasing is more inconvenient and difficult.

The utility model has the following contents:

the utility model discloses make the improvement to the problem that above-mentioned prior art exists, promptly the utility model aims to solve the technical problem that a dish formula cable releaser of stopping is provided, reasonable in design conveniently brakes the unwrapping wire of cable drum.

In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a dish formula cable release that stops, includes from up parallel arrangement's support bedplate, dish brake piece and top bearing plate down in proper order, the outside end of supporting the bedplate is installed and is used for stopping the calliper with dish brake piece matched with dish, the bottom and the support bedplate rotation of dish brake piece are connected, and the top bearing plate of dish brake piece link firmly, the middle part of top bearing plate links firmly that vertical setting is used for running through the connecting rod of cable dish hole.

Furthermore, the bottom surface of top bearing plate links firmly first flange, the below of dish piece of stopping is equipped with the second flange, it is fixed to be connected through the connecting screw that a plurality of is the circumference equipartition between the lower extreme of first flange, dish piece of stopping and the upper end of second flange, the lower extreme and the support bedplate of second flange rotate to be connected.

Furthermore, a circular ring-shaped bearing partition plate is fixedly connected to the top surface of the support seat plate, a first bearing is vertically arranged on the top surface of the bearing partition plate, the lower end of an inner ring of the first bearing is fixedly embedded into an inner hole of the bearing partition plate, a limiting block is arranged on the periphery of the outer side of the bearing partition plate, and an arc surface used for being in contact with the bearing partition plate and the first bearing is arranged at one end, close to the bearing partition plate, of the limiting block; the lower end of the second connecting flange extends into the upper end of the inner ring of the first bearing and is fixed with the inner ring of the first bearing.

Further, a fixed partition plate is fixedly connected to the lower end of the inner hole of the second connecting flange, and a vertical through hole is formed in the middle of the fixed partition plate; the middle of the top surface of the supporting seat plate is fixedly connected with a vertically arranged connecting screw rod, the upper end of the connecting screw rod penetrates through the bearing partition plate, the first bearing, the vertical through hole and the second connecting flange and then is connected with a locking nut in a threaded mode, and a plane bearing sleeved on the outer side of the connecting screw rod is arranged between the locking nut and the top surface of the fixed partition plate.

Furthermore, one end of the bearing partition plate is provided with a connecting plate, and the top surface of the connecting plate is fixedly connected with a disc brake fixing pin for limiting and fixing the disc brake calipers.

Furthermore, the disc brake caliper is a hydraulic disc brake caliper, the hydraulic disc brake caliper is connected with a hydraulic pedal through a hydraulic pipe, and the hydraulic pedal is used for driving the hydraulic disc brake caliper to act.

Furthermore, a vertically arranged connecting nut is fixedly connected to the middle of the top surface of the top bearing plate, and an adjustable positioning block assembly used for being matched with an inner hole of the cable tray and positioning is arranged on the outer side of the connecting nut; the bottom and the top of connecting rod are connected with connecting screw and last connecting screw down respectively, connecting screw and coupling nut looks spiro union down, it has the adjusting collar to go up the spiro union on the connecting screw, the outside of adjusting collar is equipped with and is used for producing the adjustable rotating assembly of relative rotation with the hole of cable dish.

Furthermore, three first connecting through holes which are uniformly distributed around the axis of the connecting nut in a circumferential manner are formed in the top bearing plate on the outer side of the connecting nut, a plurality of adjusting holes which are distributed in an arc shape are formed between every two adjacent first connecting through holes, and the arc opening directions of the plurality of adjusting holes face the connecting nut; the adjustable positioning block assembly comprises three arc-shaped positioning blocks which are uniformly distributed circumferentially around the axis of the connecting nut, the arc openings of the arc-shaped positioning blocks face the axis of the connecting nut, one end of each arc-shaped positioning block is provided with a second connecting through hole, the other end of each arc-shaped positioning block is fixedly connected with a positioning rod which is used for being in plug-in connection with the adjusting hole in a matched mode, and the arc-shaped positioning blocks and the top bearing plate are locked through fastening screws which penetrate through the first connecting through holes and the second connecting through holes in a threaded.

Further, adjustable rotating assembly is including linking firmly the regulation limiting plate that just is used for contacting with the terminal surface of cable dish at adjusting collar lateral wall lower extreme, be equipped with three radial spout that is the circumference equipartition round the axis of adjusting collar on the regulation limiting plate, vertically wear to be equipped with a sliding bolt in the radial spout, sliding bolt has fastening nut in the equal spiro union in the upper and lower both sides of radial spout, is located to be provided with between fastening nut of carrying out radial spout downside and the bolt head of sliding bolt and is used for the second bearing of the relative rotation of hole lateral wall with the cable dish.

Compared with the prior art, the utility model discloses following effect has: the utility model has the advantages of reasonable design, convenient to use is convenient for brake the unwrapping wire of cable drum, effectively avoids causing the cable pine to take off the condition emergence on ground because of cable drum rotational speed is too fast.

Description of the drawings:

fig. 1 is a schematic front sectional view of an embodiment of the present invention;

fig. 2 is a schematic perspective view of an embodiment of the present invention;

fig. 3 is an exploded view of an embodiment of the present invention;

fig. 4 is a schematic top view of an adjustable positioning block assembly according to an embodiment of the present invention;

FIG. 5 is a schematic top view of a top weighing plate according to an embodiment of the present invention;

FIG. 6 is a schematic top view of an adjustable pivot assembly according to an embodiment of the present invention;

fig. 7 is a schematic view of a front view using section state of the embodiment of the present invention;

FIG. 8 is an enlarged schematic view A of FIG. 7;

FIG. 9 is an enlarged schematic view at B in FIG. 7;

fig. 10 is a schematic top view of the supporting seat plate and the top bearing member of the embodiment of the present invention.

In the figure:

1-supporting a seat plate; 2-a disc brake sheet; 3-top bearing plate; 4-disc brake calipers; 5-a first connecting flange; 6-a second connecting flange; 7-connecting screws; 8-fixing the nut; 9-bearing spacer plate; 10-a first bearing; 11-a fixed partition; 12-connecting a screw rod; 13-a locking nut; 14-a planar bearing; 15-disc brake fixing pin; 16-a hydraulic tube; 17-a hydraulic pedal; 18-a limiting block; 181-arc surface; 19-a coupling nut; 20-a cable reel; 201-inner hole; 21-an adjustable positioning block assembly; 22-a connecting rod; 23-lower connecting screw; 24-upper connecting screw; 25-an adjusting sleeve; 26-an adjustable rotating assembly; 27-a conditioning aperture; 28-first connection screw holes; 29-arc positioning blocks; 30-positioning rods; 31-a fastening screw; 32-adjusting the limit plate; 33-radial runners; 34-a sliding bolt; 35-a fastening nut; 36-a second bearing; 37-rubber shock-absorbing pad; 38-bolt.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1 to 10, the disc brake type cable releaser of the present invention comprises a circular support base plate 1, a circular disc brake sheet 2 and a circular top bearing plate 3, which are arranged in parallel from bottom to top, wherein a disc brake caliper 4 for clamping the disc brake sheet 2 is installed at the outer side end of the support base plate 1, the bottom of the disc brake sheet 2 is rotatably connected with the support base plate 1, and the two can rotate relatively; the top of the disc brake sheet 2 is fixedly connected with the top bearing plate 3, the top bearing plate 3 is used for supporting the cable disc 20, when the top bearing plate 3 rotates under the driving of the cable disc 20, the top bearing plate 3 drives the disc brake sheet 2 to synchronously rotate, at the moment, only the disc brake caliper 4 needs to be driven to work, and the disc brake sheet 2 is clamped by the disc brake caliper 4, so that the cable disc 20 can be braked by paying off; and the middle part of the top bearing plate 3 is also fixedly connected with a connecting rod 22 which is vertically arranged and is used for penetrating through an inner hole 201 of the cable tray.

In this embodiment, the bottom surface of the top bearing plate 3 is welded with a circular first connecting flange 5, the below of dish brake piece 2 is equipped with the annular second flange 6 of circle, the lower extreme lateral wall of first flange 5 is equipped with the first engaging lug that a plurality of is the circumference equipartition around the axis of first flange 5, the upper end lateral wall of second flange 6 is equipped with the second engaging lug that a plurality of is the circumference equipartition around the axis of second flange 6, a plurality of second engaging lug is corresponding with the position of the first engaging lug of a plurality of, first flange 5, dish brake piece 2 and second flange 6 cooperate with fixation nut 8 through the connecting screw 7 that up passes second engaging lug, dish brake piece 2 and first engaging lug from down, realize that three's locking is fixed, the lower extreme of second flange 6 rotates with support 1 and is connected.

In this embodiment, the top surface of the support base plate 1 is coaxially provided with a circular ring-shaped bearing partition plate 9, the outer circumferential surface of the bearing partition plate 9 is provided with three connecting portions, and the connecting portions are locked and fixed with the support base plate 1 via bolts 38, so that the fixed connection between the bearing partition plate 9 and the support base plate 1 is realized. A first bearing 10 is vertically arranged on the top surface of the bearing partition plate 9, the first bearing 10 is a single-row tapered roller bearing, and the tapered roller bearing is embedded into an inner hole of the bearing partition plate 9 by utilizing the protruding part because the lower end of an inner ring of the tapered roller bearing protrudes out of an outer ring, so that the fixed installation of the tapered roller bearing is completed; the lower end of the second connecting flange 6 extends into the upper end of the inner ring of the first bearing 10 and is fixed with the inner ring of the first bearing 10, so that the second connecting flange 6 drives the inner ring of the first bearing to rotate when rotating, and the tapered roller bearing is mainly used for bearing the rotating action.

In this embodiment, in order to conveniently limit and fix the bearing partition plate 9 and the first bearing, the periphery of the outer side of the bearing partition plate 9 is provided with a limiting block 18 fixedly connected to the top surface of the support seat plate 1, and one end of the limiting block 18 close to the bearing partition plate 9 is provided with an arc surface 181 used for contacting with the peripheral side surfaces of the bearing partition plate 9 and the first bearing 10; the limiting blocks on the periphery can fix the bearing partition plate and the first bearing by utilizing the arc surfaces.

In the embodiment, a fixed partition plate 11 is welded at the lower end of an inner hole of the second connecting flange 6, and a vertical through hole is formed in the middle of the fixed partition plate 11; the middle of the top surface of the supporting seat plate 1 is fixedly connected with a vertically arranged connecting screw rod 12, the upper end of the connecting screw rod 12 penetrates through a bearing partition plate 9, a first bearing 10, a vertical through hole and a second connecting flange 6 and then is in threaded connection with a locking nut 13, a plane bearing 14 sleeved on the outer side of the connecting screw rod 12 is arranged between the locking nut 13 and the top surface of a fixed partition plate 11, and the plane bearing 14 is a thrust ball plane one-way bearing.

In this embodiment, one end of the bearing partition plate 9 is provided with a connecting plate, and the top surface of the connecting plate is fixedly connected with a disc brake fixing pin 15 for limiting and fixing the disc brake caliper 4. The disc brake caliper 4 is a hydraulic disc brake caliper, the hydraulic disc brake caliper is connected with a hydraulic pedal 17 through a hydraulic pipe 16, and the hydraulic pedal 17 is used for driving the hydraulic disc brake caliper to act. It should be noted that the hydraulic disc brake caliper can also be driven by a hand-held handle. It should be noted that the hydraulic disc brake caliper is an existing mature product, and the structure of the hydraulic disc brake caliper is not described herein, and the disc brake structure formed by the hydraulic disc brake caliper and the disc brake sheet can adopt the existing disc brake of the front wheel of the electric vehicle.

In this embodiment, a vertically arranged connecting nut 19 is welded in the middle of the top surface of the top bearing plate 3 in a penetrating manner, and an adjustable positioning block assembly 21 for matching and positioning with an inner hole 201 of a cable tray 20 is arranged on the outer side of the connecting nut 19; the bottom and the top of connecting rod 22 have welded connecting screw 23 and last connecting screw 24 down respectively, connecting screw 23 and coupling nut 19 looks spiro union down realize connecting rod 22 and top bearing plate 3 be connected fixedly, it has adjusting collar 25 to go up the spiro union on the connecting screw 24, the outside of adjusting collar 25 is equipped with and is used for producing relative rotatory adjustable rotating assembly 26 with the hole 201 of cable dish 20.

In this embodiment, three first connecting through holes 28 uniformly distributed around the axis of the connecting nut 19 in a circumferential manner are formed in the top bearing plate 3 on the outer side of the connecting nut 19, a plurality of adjusting holes 27 distributed in an arc shape are formed between every two adjacent first connecting through holes 28, and the arc opening direction of each adjusting hole 27 faces the connecting nut 19; adjustable locating block subassembly 21 includes that three axis round coupling nut 19 is the arc locating piece 29 of circumference equipartition, arc locating piece 29's arc mouth is corresponding towards coupling nut 19's axis, and every arc locating piece 29 and the regulation hole that a plurality of arc form distributes, and second connect hole has been seted up to arc locating piece 29's one end, the other end is linked firmly and is used for pegging graft complex locating lever 30 with regulation hole 27, and it is fixed to wear to establish first connect through hole 28 and second connect through hole's fastening screw 31 locking via the screw between arc locating piece 29 and the top bearing plate 3. The cable reel positioning device has the advantages that the three arc-shaped positioning blocks are matched with the inner holes of the cable reel, so that the cable reel can be positioned, when the fastening screws are loosened, the arc-shaped positioning blocks are rotated around the fastening screws, the positioning rods are matched with other adjusting holes, the positions of the arc-shaped positioning blocks can be adjusted, and the cable reel positioning device is further adaptable to cable reels with different inner hole diameters.

In this embodiment, the adjustable rotating assembly 26 includes a triangular adjusting limiting plate 32 fixedly connected to the lower end of the outer side wall of the adjusting sleeve 25 and used for contacting with the end surface of the cable tray 20, three radial sliding grooves 33 circumferentially and uniformly distributed around the axis of the adjusting sleeve 25 are formed in the adjusting limiting plate 32, a sliding bolt 34 vertically penetrates through the radial sliding grooves 33, fastening nuts 35 are screwed on the upper and lower sides of the sliding bolt 34 in the radial sliding grooves 33, a second bearing 36 used for rotating relative to the side wall of the inner hole 201 of the cable tray 20 is arranged between the fastening nuts 35 located on the lower side of the radial sliding grooves 33 and the bolt head of the sliding bolt 34, and the second bearing 36 is a ball bearing. Through installing the second bearing on sliding bolt, when the connecting rod runs through the hole of cable dish, adjust the terminal surface looks butt of limiting plate and cable dish, the sliding bolt on the regulation limiting plate stretches into the hole of cable dish, and the second bearing on the sliding bolt contacts with the hole of cable dish, and the second bearing can play the pulley effect, can rotate the relative rotation when cable dish rotates. The three sliding bolts can move along the radial sliding grooves, the diameters of circular planes where the three sliding bolts are located are enlarged or reduced by adjusting the positions of the three sliding bolts, and therefore the cable reel can adapt to cable reels with different inner hole diameters, and the cable reel is good in use flexibility.

In this embodiment, the axes of the connecting nut 19, the top bearing plate 3, the first connecting flange 5, the disc brake sheet 2, the second connecting flange 6, the fixing partition plate 9, the first bearing, the plane bearing, the bearing partition plate 9 and the support seat plate 1 coincide with each other.

In this embodiment, a rubber shock pad 37 is fixed to the bottom surface of the supporting seat plate 1 by gluing or screwing, and is used for buffering the damage of mechanical force to the whole supporting seat plate.

The specific working process is as follows: in the initial state, the cable tray 20 is horizontally placed on the ground, the connecting rod 22 is separated from the connecting nut 19 on the top bearing plate 3, and the working method comprises the following steps:

step S1: the connecting rod 22 horizontally penetrates along an inner hole 201 of the cable tray 20, an adjusting limiting plate 32 which is screwed on the outer side wall of an adjusting sleeve 25 at one end of the connecting rod 22 is abutted to the end face of the cable tray 20, a sliding bolt 34 on the adjusting limiting plate 32 extends into the inner hole 201 of the cable tray 20, a second bearing 36 on the sliding bolt 34 is in contact with the inner hole 201 of the cable tray 20, and the second bearing and the inner hole of the cable tray can rotate relatively;

step S2: the connecting nut 19 on the top bearing plate 3 is in threaded connection with the lower connecting screw rod 23 of the connecting rod 22, so that the top bearing plate 3 is abutted against the end face of the cable tray 20, and the top bearing plate 3 and the adjusting limit plate 32 axially position the cable tray 20;

step S3: the cable tray 20 is pushed to be vertically placed on the top bearing plate 3 through manpower, and the support seat plate 1 is supported on the ground;

step S4: the cable head of the cable on the cable tray 20 is pulled to pay off;

step S5: when the paying-off of the cable disc 20 needs to be braked, the hydraulic pedal 17 is stepped on by a manual foot, the hydraulic pedal 17 drives the hydraulic disc brake caliper 4 to act, and the hydraulic disc brake caliper 4 clamps the disc brake sheet 2 to complete braking. It should be noted that after the cable drum is vertically placed on the top weighing plate, the connecting rod can be unscrewed to separate the connecting rod from the connecting nut of the top weighing plate, and the connecting rod is mounted on other releasers for continuous use, so that the connecting rod is shared.

The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.

The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (9)

1. The utility model provides a dish formula cable release that stops which characterized in that: including from up parallel arrangement's support bedplate, dish piece and the top bearing plate of stopping in proper order down, the outside end of supporting the bedplate is installed and is used for stopping the calliper with dish piece matched with dish, the bottom and the support bedplate rotation of dish piece of stopping are connected, and the top bearing plate of dish piece of stopping connect firmly, the middle part of top bearing plate connects firmly that has vertical setting and is used for the connecting rod that runs through the cable dish hole.

2. The disc brake type cable releaser of claim 1, wherein: the bottom surface of top bearing plate links firmly first flange, the below of dish piece of stopping is equipped with second flange, it is fixed to be connected through the connecting screw that a plurality of is the circumference equipartition between the lower extreme of first flange, dish piece of stopping and the upper end of second flange, the lower extreme and the support bedplate of second flange rotate to be connected.

3. The disc brake cable releaser of claim 2, wherein: the top surface of the support seat plate is fixedly connected with a circular bearing partition plate, a first bearing is vertically arranged on the top surface of the bearing partition plate, the lower end of an inner ring of the first bearing is fixedly embedded into an inner hole of the bearing partition plate, a limiting block is arranged on the periphery of the outer side of the bearing partition plate, and an arc surface used for being in contact with the bearing partition plate and the first bearing is arranged at one end, close to the bearing partition plate, of the limiting block; the lower end of the second connecting flange extends into the upper end of the inner ring of the first bearing and is fixed with the inner ring of the first bearing.

4. The disc brake cable releaser of claim 3, wherein: a fixed partition plate is fixedly connected to the lower end of the inner hole of the second connecting flange, and a vertical through hole is formed in the middle of the fixed partition plate; the middle of the top surface of the supporting seat plate is fixedly connected with a vertically arranged connecting screw rod, the upper end of the connecting screw rod penetrates through the bearing partition plate, the first bearing, the vertical through hole and the second connecting flange and then is connected with a locking nut in a threaded mode, and a plane bearing sleeved on the outer side of the connecting screw rod is arranged between the locking nut and the top surface of the fixed partition plate.

5. The disc brake cable releaser of claim 3, wherein: one end of the bearing partition plate is provided with a connecting plate, and the top surface of the connecting plate is fixedly connected with a disc brake fixing pin for limiting and fixing the disc brake calipers.

6. The disc brake type cable releaser of claim 1, wherein: the disc brake caliper is a hydraulic disc brake caliper, the hydraulic disc brake caliper is connected with a hydraulic pedal through a hydraulic pipe, and the hydraulic pedal is used for driving the hydraulic disc brake caliper to move.

7. The disc brake type cable releaser of claim 1, wherein: the middle part of the top surface of the top bearing plate is fixedly connected with a vertically arranged connecting nut, and the outer side of the connecting nut is provided with an adjustable positioning block assembly which is used for being matched with an inner hole of the cable tray and positioning; the bottom and the top of connecting rod are connected with connecting screw and last connecting screw down respectively, connecting screw and coupling nut looks spiro union down, it has the adjusting collar to go up the spiro union on the connecting screw, the outside of adjusting collar is equipped with and is used for producing the adjustable rotating assembly of relative rotation with the hole of cable dish.

8. The disc brake cable releaser of claim 7, wherein: three first connecting through holes which are uniformly distributed around the axis of the connecting nut in a circumferential manner are formed in the top bearing plate on the outer side of the connecting nut, a plurality of adjusting holes which are distributed in an arc shape are formed between every two adjacent first connecting through holes, and the arc opening directions of the plurality of adjusting holes face the connecting nut; the adjustable positioning block assembly comprises three arc-shaped positioning blocks which are uniformly distributed circumferentially around the axis of the connecting nut, the arc openings of the arc-shaped positioning blocks face the axis of the connecting nut, one end of each arc-shaped positioning block is provided with a second connecting through hole, the other end of each arc-shaped positioning block is fixedly connected with a positioning rod which is used for being in plug-in connection with the adjusting hole in a matched mode, and the arc-shaped positioning blocks and the top bearing plate are locked through fastening screws which penetrate through the first connecting through holes and the second connecting through holes in a threaded.

9. The disc brake cable releaser of claim 7, wherein: the adjustable rotating assembly comprises an adjusting limiting plate fixedly connected to the lower end of the outer side wall of the adjusting sleeve and used for being in contact with the end face of the cable tray, three radial sliding grooves which are uniformly distributed circumferentially around the axis of the adjusting sleeve are formed in the adjusting limiting plate, a sliding bolt vertically penetrates through the radial sliding grooves, fastening nuts are screwed on the upper side and the lower side of each radial sliding groove of the sliding bolt, and a second bearing used for rotating relative to the inner hole side wall of the cable tray is arranged between the fastening nuts on the lower side of the radial sliding grooves and the bolt head of the sliding bolt.

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