CN216598941U - Cable protection device for building electrical engineering - Google Patents

Abstract

The utility model discloses a cable protection device for building electrical engineering, which comprises: a first support plate and a second support plate; the center of the first roll shaft is coaxially and fixedly connected with a first rotating shaft, two end parts of the first rotating shaft are respectively and rotatably connected to the first supporting plate and the second supporting plate, and a cable to be conveyed is placed on the first roll shaft; the rotating rod is connected to an output shaft of the motor; and the sheave mechanism comprises a notch disc and a sheave which are matched with each other, the notch disc is connected to the rotating rod and can synchronously rotate with the rotating rod, and the sheave is connected to the first rotating shaft and can synchronously rotate with the first rotating shaft, so that the motor can drive the first rotating shaft and the first roller shaft to intermittently rotate through the rotating rod and the sheave mechanism to intermittently convey the cable. The utility model ensures the stable transmission of the cable by intermittently rotating the rotating shaft and the first roller shaft through the sheave mechanism, effectively prevents the cable from being accumulated and wound, is convenient for workers to lay and use, has simple structure and convenient operation.

Description

Cable protection device for building electrical engineering

Technical Field

The utility model relates to a building cable technology, in particular to a cable protection device for building electrical engineering.

Background

The building electrical engineering is in a building, utilizes modern advanced scientific theory and electrical technology to transmit and distribute electric energy, apply the electric energy and transmit information, provides comfortable, convenient and safe building environment for people, and the cable is a general name of articles such as optical cables, electric cables and the like, has a plurality of purposes, is mainly used for controlling multiple functions such as installation, connecting equipment, transmitting electric power and the like, and is a common and indispensable thing in daily life. The cable among the prior art adopts artifical manual cable of dragging to lay usually in the installation use of building electrical engineering, because the cable texture is hard, weight height is difficult to lay, and the cable drags the easy department of in-process and rubs with the wall body turning, destroys the integrality of its outer wall protection, influences the result of use of cable.

SUMMERY OF THE UTILITY MODEL

The cable protection device for the building electrical engineering aims to overcome the defects in the prior art, and the cable protection device for the building electrical engineering ensures that the rotating shaft and the first roller shaft rotate intermittently through the sheave mechanism, ensures the stable conveying of cables, effectively prevents the cables from being accumulated and wound, is convenient for workers to lay and use, and is simple in structure and convenient to operate.

The technical scheme adopted by the utility model is as follows: a cable protection device for construction electrical engineering, the cable protection device comprising:

the support device comprises a first support plate and a second support plate which are arranged in a bilateral symmetry mode, so that an installation space is formed between the first support plate and the second support plate;

the center of the first roll shaft is coaxially and fixedly connected with a first rotating shaft, and the first rotating shaft is provided with a left end part and a right end part which are opposite; the first roll shaft is arranged in the installation space, and the left end part and the right end part of the first rotating shaft are respectively and rotatably connected to the first supporting plate and the second supporting plate; a cable to be conveyed is placed on the first roller shaft;

the motor is arranged on the outer wall of the second supporting plate;

the right end part of the rotating rod is connected to the output shaft of the motor, and the left end part of the rotating rod penetrates through the second supporting plate and extends into the mounting space; and

the grooved pulley mechanism comprises a notched disc and a grooved pulley which are matched with each other, the notched disc is connected to the left end of the rotating rod and can synchronously rotate with the rotating rod, the grooved pulley is connected to the right end of the first rotating shaft and can synchronously rotate with the first rotating shaft, and therefore the motor can drive the first rotating shaft and the first roller shaft to intermittently rotate through the rotating rod and the grooved pulley mechanism so as to intermittently convey the cable.

Further, the cable protection device further comprises a second roller shaft, wherein the second roller shaft is arranged in the installation space and is positioned above the first roller shaft so that the first roller shaft and the second roller shaft can clamp the cable;

wherein, the coaxial fixedly connected with second pivot in center of second roller, the second pivot includes relative left end portion and right-hand member portion, the left end portion and the right-hand member portion of second pivot are connected respectively first backup pad with in the second backup pad, and, the second pivot with first backup pad with can rotate relatively between the second backup pad, so that during the cable transmission, the second roller is in can take place under the effect of cable with the rotation that is opposite of first roller.

Further, the first backup pad with all seted up the spout in the second backup pad, every equal sliding connection has the slider in the spout, the left end portion and the right-hand member of second pivot rotate respectively to be connected first backup pad with on the slider in the spout of second backup pad, so that the second roller can be in under the effect of slider follow the spout reciprocates with the centre gripping the cable.

Further, a spring is arranged between the upper surface of the sliding block and the upper inner wall of the sliding groove, and the first roller shaft and the second roller shaft are used for clamping the cable through the restoring force of the spring.

Furthermore, a plurality of grooves which are arranged in an annular array structure are formed in the outer walls of the first roller shaft and the second roller shaft, and a rubber block is embedded into each groove, so that when the first roller shaft and the second roller shaft clamp the cable, the rubber blocks are tightly pressed with the outer wall of the cable, and the cable is prevented from sliding and falling off.

Further, when the cable protection device works, the rotating direction of the first roller shaft is a positive direction, the rotating direction opposite to the positive direction is a negative direction, and a first limiting device for limiting the first roller shaft to rotate in the negative direction is arranged on the first rotating shaft.

Further, the first limiting device comprises a first ratchet wheel and a first pawl which are matched with each other, wherein,

the first ratchet wheel is connected to the first rotating shaft and can synchronously rotate with the first rotating shaft;

the first pawl is provided with a first end and a second end which are opposite, the first end of the first pawl is hinged to the second support plate through a first connecting shaft, and the second end of the first pawl is matched with the gear teeth of the first ratchet wheel so as to limit the first ratchet wheel to rotate in the opposite direction and further limit the first roller shaft to rotate in the opposite direction;

the first connecting shaft is fixedly connected to the second supporting plate, and the first end of the first pawl is rotatably connected to the first connecting shaft; the first connecting shaft is sleeved with a first torsion spring used for attaching the first pawl to the first ratchet wheel.

Furthermore, a second limiting device for limiting the second rotating shaft to rotate in the positive direction is arranged on the second rotating shaft.

Further, the second limiting device comprises a second ratchet wheel and a second pawl which are matched with each other, wherein,

the second ratchet wheel is connected to the second rotating shaft and can synchronously rotate with the second rotating shaft;

the second pawl is provided with a first end and a second end which are opposite, the first end of the second pawl is hinged to the sliding block through a second connecting shaft, and the second end of the second pawl is matched with the gear teeth of the second ratchet wheel so as to limit the second ratchet wheel to rotate in the positive direction and further limit the second roller shaft to rotate in the positive direction;

the second connecting shaft is fixedly connected to the sliding block, and the first end of the second pawl is rotatably connected to the second connecting shaft; and a second torsion spring used for attaching the second pawl to the second ratchet wheel is sleeved on the second connecting shaft.

Furthermore, the cable protection device also comprises a mounting seat, and the first support plate and the second support plate are fixedly connected to the mounting seat; and a sucker for fixing the cable protection device is arranged at the bottom of the mounting seat.

The utility model has the beneficial effects that:

1. the device is installed at the turning and vertical position of a transmission cable of the electrical engineering of a building through a sucking disc and then fixed, then a second roll shaft is pulled to move upwards, a sliding block, a second ratchet wheel and a second pawl are enabled to rise synchronously along a sliding groove, the cable to be transmitted and laid is placed in a gap between the second roll shaft and a first roll shaft, the second roll shaft is loosened through the restoring force of a spring, the second roll shaft and the first roll shaft clamp the cable, a rubber block is tightly pressed with the outer wall of the cable at the moment, a rotating rod is driven by a motor to rotate so that a notch disc and a rotating block rotate synchronously, the rotating block slides along a radial groove, the notch disc is in friction contact with an inward concave part of a grooved wheel, a first rotating shaft and the first roll shaft are driven to rotate, meanwhile, the first ratchet wheel and the first roll shaft rotate synchronously, the first roll shaft drives the second roll shaft to move synchronously and reversely through the cable, at the moment, the rotating direction of the second ratchet wheel is the same as that of the second roll shaft, the first pawl limits the moving direction of the first ratchet wheel, the second pawl limits the moving direction of the second ratchet wheel, and the rubber block enables the cable to be conveyed and clamped more stably. The problem of adopt artifical manual cable of dragging to lay is solved, because the cable texture is hard, weight is high difficult to lay, the cable pulls the friction of easy department and wall body turning in-process, destroys the integrality of its outer wall protection, influences the result of use of cable is solved, realized making things convenient for pulling labour saving and time saving of cable, reduced with the friction of wall body turning, effectively protected the outer wall and the integrality of cable, prolonged the life of cable, it is better to have practiced thrift cost-effectiveness.

2. The motor drives the notch disc and the rotating block to rotate, so that the grooved wheel is conveniently driven to rotate, the first rotating shaft and the first roller shaft intermittently rotate, the stable conveying of cables is ensured, the cables are effectively prevented from being accumulated and wound, the laying and the use of workers are facilitated, and the motor is simple in structure and convenient to operate.

3. According to the utility model, the rubber blocks on the outer walls of the first roller shaft and the second roller shaft are in friction contact with the outer wall of the cable, the sliding block is extruded by the spring, so that the cable is more stably clamped and transported and is not easy to slide and fall off, the damage to the outer wall of the cable is reduced, the secondary damage to the cable caused by the sliding and falling off is reduced, the service life of the cable is prolonged, and the use effects of conveying and laying are improved.

Drawings

FIG. 1: the utility model has the overall structure schematic diagram;

FIG. 2: the structural diagram of the sheave mechanism is shown;

FIG. 3: the end part connecting structure of the second roll shaft is shown schematically;

FIG. 4: the groove structure of the utility model is in a sectional view.

The attached drawings are marked as follows:

1-mounting seat; 2-a sucker;

3-a second support plate; 4-electric machine;

5-rotating rod; 6-notched disc;

7-cylindrical pin; 8-grooved wheel;

9-radial groove; 10-first rotating shaft;

11-first ratchet; 12-a first pawl;

13-first roller shaft; 14-secondary roller shaft;

15-first support plate; 16-chute;

17-a slide block; 18-a spring;

19-second ratchet; 20-second pawl;

21-a groove; 22-rubber block;

23-second coupling shaft; 24-second torsion spring;

25-swivel arm; 26-second shaft.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:

as shown in fig. 1 to 4, the cable protection device for the building electrical engineering comprises a mounting base 1, a suction cup 2, a second support plate 3, a motor 4, a rotating rod 5, a sheave mechanism, a first roller shaft 13, a second roller shaft 14, a first support plate 15, a sliding block 17, a spring 18, a rubber block 22, a first limiting device, a second limiting device and the like.

The bottom surface of mount pad 1 is bilateral symmetry structure and has set firmly two sucking discs 2, the upper surface of mount pad 1 is bilateral symmetry structure and has set firmly first backup pad 15 and second backup pad 3 first backup pad 15 with form installation space between the second backup pad 3.

A first rotating shaft 10 is coaxially and fixedly connected to the center of the first roller shaft 13, and the first rotating shaft 10 has opposite left and right end portions. First roller 13 sets up in the installation space, the left end and the right-hand member of first pivot 10 respectively with first backup pad 15 with second backup pad 3 rotates and connects, first backup pad 15 with second backup pad 3 does first pivot 10 provides the supporting condition, wherein, the right-hand member of first pivot 10 passes first backup pad 15 extends to outside the outer wall of first backup pad 15 for connect first ratchet 11. The cable to be conveyed is placed on the first roller shaft 13, and when the first roller shaft 13 rotates, the rotating first roller shaft 13 can drive the cable to advance through the friction force between the cable and the first roller shaft 13 so as to achieve the purpose of conveying the cable.

A second roller shaft 14 arranged in parallel with the first roller shaft 13 may be provided above the first roller shaft 13 in the installation space, so that the first roller shaft 13 and the second roller shaft 14 can clamp the cable from the upper and lower sides to more stably transfer the cable. Wherein, the coaxial fixedly connected with second pivot 26 in center of second roller 14, second pivot 26 includes relative left end portion and right-hand member portion, the left end portion and the right-hand member portion of second pivot 26 are connected respectively in first backup pad 15 with on the second backup pad 3, and, second pivot 26 with can relatively rotate between first backup pad 15 and the second backup pad 3, so that during the cable transmission, second roller 14 can take place with first roller 13 opposite rotation under the effect of cable. In order to facilitate the penetration of the cables to be transmitted in the gap between the first roller shaft and the second roller shaft 14 and the clamping of the cables, the second roller shaft 14 is configured to be capable of moving up and down, specifically, sliding grooves 16 are formed in the first support plate 15 and the second support plate 3, a sliding block 17 is connected in each sliding groove 16 in a sliding manner, and the left end portion and the right end portion of the second rotating shaft 26 are respectively connected to the sliding blocks 17 in the sliding grooves 16 of the first support plate 15 and the second support plate 3 in a rotating manner, so that the second roller shaft 14 can move up and down along the sliding grooves 16 under the action of the sliding blocks 17 to clamp the cables; in addition, a spring 18 is arranged between the upper surface of the sliding block 17 and the upper inner wall of the sliding groove 16, and the cable is conveniently clamped through the extrusion of the spring 18.

A plurality of grooves 21 arranged in an annular array structure are formed in the outer walls of the first roller shaft 13 and the second roller shaft 14, and a rubber block 22 is embedded in each groove 21, so that when the first roller shaft 13 and the second roller shaft 14 clamp the cable, the rubber blocks 22 are tightly pressed on the outer wall of the cable to prevent the cable from sliding and falling off.

The primary roller shaft 13 is driven by the motor 4, the rotating rod 5 and the geneva mechanism. The motor 4 is mounted on the outer wall of the second support plate 3 through a bracket. The rotating rod 5 comprises a left end and a right end which are opposite, the right end of the rotating rod 5 is connected to an output shaft of the motor 4, the rotating rod 5 is coaxially connected with the output shaft, and the left end of the rotating rod 5 penetrates through the second supporting plate 3 and extends into the installation space. The grooved pulley mechanism adopts an existing single-arm external-meshing grooved pulley mechanism, the grooved pulley mechanism comprises a notched disc 6 and a grooved pulley 8 which are matched with each other, a plurality of radial grooves 9 which are arranged in an annular array structure are formed in the outer wall of the grooved pulley 8, and a cylindrical pin 7 which synchronously rotates with the notched disc 6 and is matched with the radial grooves 9 is fixedly connected in a notch of the notched disc 6 through a rotating arm 25. The working principle of the sheave mechanism is as follows: the notched disc 6 rotates continuously, when the cylindrical pin 7 does not enter the radial groove 9, the convex arc of the notched disc 6 rotates into the concave arc of the grooved pulley 8, and the grooved pulley 8 is static and does not move because of being locked by the convex arc and the concave arc; when the cylindrical pin 7 starts to enter the radial groove 9, the locking action of the convex arc and the concave arc is stopped, and the grooved wheel 8 rotates reversely opposite to the rotation of the notch disc 6 under the driving of the cylindrical pin 7; when the cylindrical pin 7 begins to be separated from the radial groove 9, the convex arc of the notch disc 6 is locked with the concave arc of the grooved wheel 8, and the grooved wheel 8 is still, so that the one-way intermittent rotation of the grooved wheel 8 is realized. The breach disc 6 is connected on the left end portion of bull stick 5 and can with bull stick 5 synchronous rotation, sheave 8 is connected on the right-hand member portion of first pivot 10 and can with first pivot 10 synchronous rotation, so that motor 4 can pass through bull stick 5 with sheave mechanism drives first pivot 10 with first roller 13 intermittent type rotates in order to realize intermittent type and carries the cable has prevented piling up and winding of cable, makes things convenient for the staff to lay and use.

Establish cable protection device during operation, first roller 13 pivoted direction is the positive direction, with the opposite rotation direction in positive direction is the reverse direction, be provided with the restriction on the first pivot 10 carries out the first stop device of reverse direction pivoted, be provided with the restriction in the second pivot 26 carries out positive direction pivoted second stop device. The first limiting device and the second limiting device are both ratchet mechanisms.

The first limiting device comprises a first ratchet wheel 11 and a first pawl 12 which are matched with each other. The first ratchet wheel 11 is connected to the right end of the first rotating shaft 10 and can rotate synchronously with the first rotating shaft 10; the first pawl 12 has a first end and a second end opposite to each other, the first end of the first pawl 12 is hinged to the second support plate 3 through a first connecting shaft, and the second end of the first pawl 12 cooperates with the teeth of the first ratchet wheel 11 to limit the first ratchet wheel 11 from rotating in the opposite direction, so as to limit the first roller shaft 13 from rotating in the opposite direction. Wherein, the first connecting shaft is fixedly connected to the second supporting plate 3, and the first end of the first pawl 12 is rotatably connected to the first connecting shaft; the middle part outer wall of the first connecting shaft is sleeved with a first torsion spring used for enabling the first pawl 12 to be attached to the first ratchet wheel 11, one end of the first torsion spring is fixedly connected with the first pawl 12, and the other end of the first torsion spring is fixedly connected with the connecting shaft. When the first ratchet wheel 11 rotates in the positive direction along with the first roller 13, the second end of the first pawl 12 slides on the first ratchet wheel 11, and the positive rotation of the first ratchet wheel 11 is not affected; when the first roller shaft 13 is intended to rotate in the opposite direction, the second end of the first pawl 12 is engaged with the gear teeth of the first ratchet wheel 11, so that the first ratchet wheel 11 cannot rotate in the opposite direction, and the first roller shaft 13 is restricted from rotating in the opposite direction.

The number of the second limiting devices can be two, and the two second limiting devices are respectively arranged at the left end part and the right end part of the second rotating shaft 26 in a bilateral symmetry structure. The second limiting means comprises a second ratchet wheel 19 and a second pawl 20 which are matched with each other. The second ratchet wheel 19 is connected to the second rotating shaft 26 and can rotate synchronously with the second rotating shaft 26; the second pawl 20 has a first end and a second end opposite to each other, the first end of the second pawl 20 is hinged to the sliding block 17 through a second connecting shaft 23, and the second end of the second pawl is matched with the gear teeth of the second ratchet wheel 19 to limit the second ratchet wheel 19 to rotate in the positive direction, so as to limit the second roller shaft 14 to rotate in the positive direction. The second connecting shaft 23 is fixedly connected to the slider 17, and the first end of the second pawl 20 is rotatably connected to the second connecting shaft 23; the middle part outer wall of the second connecting shaft 23 is sleeved with a second torsion spring 24 used for connecting the second pawl 20 with the second ratchet wheel 19, as shown in fig. 3, the left end of the second torsion spring 24 is fixedly connected with the left end of the second pawl 20, and the right end of the second torsion spring 24 is fixedly connected with the right end of the second connecting shaft 23. When the second ratchet wheel 19 rotates in the reverse direction along with the second roller shaft 14, the second end of the second pawl 20 slides on the second ratchet wheel 19, and the reverse rotation of the second ratchet wheel 19 is not affected; when the second roller shaft 14 is required to rotate in the positive direction, the second end of the second pawl 20 is engaged with the gear teeth of the second ratchet wheel 19, so that the second ratchet wheel 19 cannot rotate in the positive direction, and the second roller shaft 14 is limited to rotate in the positive direction.

The first pawl 12 and the second pawl 20 limit the moving directions of the first ratchet wheel 11 and the second ratchet wheel 19, and the moving directions of the first ratchet wheel 11 and the second ratchet wheel 19 are opposite, so that the first roller shaft 13 and the second roller shaft 14 can clamp the cable conveniently, and the cable is effectively prevented from sliding off in the cable conveying process.

The working principle of the utility model is as follows: when the device is used, the device is firstly installed at the turning and vertical position of a transmission cable in the electrical engineering of a building through the sucking disc 2 and then fixed, then the second roller shaft 14 is pulled to move upwards, the sliding block 17, the second ratchet wheel 19 and the second pawl 20 synchronously ascend along the sliding groove 16, the cable to be transmitted and laid is placed in the gap between the second roller shaft 14 and the first roller shaft 13, the second roller shaft 14 is loosened, the second roller shaft 14 and the first roller shaft 13 clamp the cable through the restoring force of the spring 18, the rubber block 22 is tightly pressed with the outer wall of the cable to prevent the cable from sliding and falling off, the rotating rod 5 is driven by the motor 4 to rotate so that the notch disc 6 and the cylindrical pin 7 synchronously rotate, the grooved wheel 8 is driven to intermittently rotate through the matching between the notch disc 6 and the grooved wheel 8 and the matching between the cylindrical pin 7 and the radial groove 9, so that the first roller shaft 10 and the first roller shaft 13 are synchronously rotated in the gap to intermittently transmit the cable, meanwhile, the rotation of the first roller shaft 13 can drive the first ratchet wheel 11 to rotate synchronously, meanwhile, the first roller shaft 13 drives the second roller shaft 14 to move reversely synchronously through a cable, at the moment, the second ratchet wheel 19 and the second roller shaft 14 rotate in the same direction, the first pawl 12 and the second pawl 20 respectively limit the moving directions of the first ratchet wheel 11 and the second ratchet wheel 19, the cable is effectively prevented from being damaged by the reverse movement of the first roller shaft 13 and the second roller shaft 14, the rubber block 22 enables the cable to be conveyed and clamped more stably, and the cable is not easy to fall off and slip off, and the cable for the electrical engineering of the building is effectively protected.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (10)

1. A cable protection device for building electrical engineering, characterized in that the cable protection device comprises:

a first support plate (15) and a second support plate (3) which are arranged in bilateral symmetry to form an installation space between the first support plate (15) and the second support plate (3);

the center of the first roll shaft (13) is coaxially and fixedly connected with a first rotating shaft (10), and the first rotating shaft (10) is provided with a left end part and a right end part which are opposite; the first roll shaft (13) is arranged in the installation space, and the left end part and the right end part of the first rotating shaft (10) are respectively and rotatably connected to the first supporting plate (15) and the second supporting plate (3); the cable to be conveyed is placed on the first roller shaft (13);

the motor (4), the said motor (4) is set up on the outer wall of the said second shoe plate (3);

the rotating rod (5) comprises a left end part and a right end part which are opposite, the right end part of the rotating rod (5) is connected to an output shaft of the motor (4), and the left end part of the rotating rod (5) penetrates through the second supporting plate (3) to extend into the installation space; and

the sheave mechanism comprises a notch disc (6) and a sheave (8) which are matched with each other, the notch disc (6) is connected to the left end of the rotating rod (5) and can synchronously rotate with the rotating rod (5), the sheave (8) is connected to the right end of the first rotating shaft (10) and can synchronously rotate with the first rotating shaft (10), and therefore the motor (4) can drive the first rotating shaft (10) and the first roller shaft (13) to intermittently rotate through the rotating rod (5) and the sheave mechanism so as to achieve intermittent conveying of the cable.

2. The cable protector for construction electrical engineering according to claim 1, characterized in that the cable protector further comprises a second roller (14), the second roller (14) being disposed in the installation space above the first roller (13) so that the first roller (13) and the second roller (14) can grip the cable;

wherein, the coaxial fixedly connected with second pivot (26) in center of second roller (14), second pivot (26) are including relative left end portion and right-hand member portion, the left end portion and the right-hand member portion of second pivot (26) are connected respectively first backup pad (15) with on second backup pad (3), and, second pivot (26) with can relative rotation between first backup pad (15) and second backup pad (3), so that during the cable transmission, second roller (14) can take place under the effect of cable with the rotation that is opposite of first roller (13).

3. The cable protection device for building electrical engineering according to claim 2, wherein sliding grooves (16) are formed in the first support plate (15) and the second support plate (3), each sliding groove (16) is connected with a sliding block (17) in a sliding manner, and the left end portion and the right end portion of the second rotating shaft (26) are respectively connected to the sliding blocks (17) in the sliding grooves (16) of the first support plate (15) and the second support plate (3) in a rotating manner, so that the second roller shaft (14) can move up and down along the sliding grooves (16) under the action of the sliding blocks (17) to clamp the cable.

4. The cable protection device for building electrical engineering according to claim 3, characterized in that a spring (18) is provided between an upper surface of the slider (17) and an upper inner wall of the chute (16), and the first roller (13) and the second roller (14) clamp the cable by a restoring force of the spring (18).

5. The cable protection device for the building electrical engineering according to claim 2, wherein a plurality of grooves (21) arranged in an annular array structure are formed in the outer walls of the first roller shaft (13) and the second roller shaft (14), and a rubber block (22) is embedded in each groove (21), so that when the first roller shaft (13) and the second roller shaft (14) clamp the cable, the rubber block (22) is tightly pressed with the outer wall of the cable, and the cable is prevented from sliding and falling off.

6. The cable protector for building electrical engineering according to claim 1, wherein when the cable protector is in operation, the direction of rotation of the first roller shaft (13) is a forward direction, and the direction of rotation opposite to the forward direction is a reverse direction, and the first rotating shaft (10) is provided with a first stopper device for limiting the first rotating shaft (10) to rotate in the reverse direction.

7. The cable protection device for building electrical engineering according to claim 6, characterized in that the first limiting device comprises a first ratchet wheel (11) and a first pawl (12) which are mutually matched, wherein,

the first ratchet wheel (11) is connected to the first rotating shaft (10) and can synchronously rotate with the first rotating shaft (10);

the first pawl (12) is provided with a first end and a second end which are opposite, the first end of the first pawl (12) is hinged on the second support plate (3) through a first connecting shaft, and the second end of the first pawl is matched with the gear teeth of the first ratchet wheel (11) to limit the first ratchet wheel (11) to rotate in the reverse direction so as to limit the first roller shaft (13) to rotate in the reverse direction;

the first connecting shaft is fixedly connected to the second supporting plate (3), and the first end of the first pawl (12) is rotatably connected to the first connecting shaft; the first connecting shaft is sleeved with a first torsion spring used for enabling the first pawl (12) to be attached to the first ratchet wheel (11).

8. The cable protection device for building electrical engineering according to claim 3, wherein a second limiting device for limiting the second rotating shaft (26) to rotate in the positive direction is arranged on the second rotating shaft (26).

9. The cable protection device for building electrical engineering according to claim 8, characterized in that the second limiting device comprises a second ratchet wheel (19) and a second pawl (20) which are mutually matched, wherein,

the second ratchet wheel (19) is connected to the second rotating shaft (26) and can synchronously rotate with the second rotating shaft (26);

the second pawl (20) is provided with a first end and a second end which are opposite, the first end of the second pawl (20) is hinged on the sliding block (17) through a second connecting shaft (23), and the second end of the second pawl is matched with the gear teeth of the second ratchet wheel (19) to limit the second ratchet wheel (19) to rotate in the positive direction so as to limit the second roller shaft (14) to rotate in the positive direction;

the second connecting shaft (23) is fixedly connected to the sliding block (17), and the first end of the second pawl (20) is rotatably connected to the second connecting shaft (23); and a second torsion spring (24) used for jointing the second pawl (20) and the second ratchet wheel (19) is sleeved on the second connecting shaft (23).

10. The cable protection device for building electrical engineering according to claim 1, characterized in that the cable protection device further comprises a mounting base (1), wherein the first support plate (15) and the second support plate (3) are fixedly connected to the mounting base (1); and a sucker (2) for fixing the cable protection device is arranged at the bottom of the mounting seat (1).

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