CN216078938U

CN216078938U - Mounting bracket of sensor for mine

Info

Publication number: CN216078938U
Application number: CN202122019588.3U
Authority: CN
Inventors: 窦成义; 李建华; 杨朝
Original assignee: Xi'an Hongan Instrument And Instrument Co ltd
Current assignee: Dou Chengyi; Li Jianhua; Yang Chao
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-03-18
Anticipated expiration: 2031-08-25

Abstract

The application discloses installing support of sensor for mine relates to mine safety inspection device's field, and it includes the frame, its characterized in that: the utility model discloses a rope winding machine, including frame, connecting rope, drive connecting rope, connecting rope and drive, the frame is last to have seted up the spout, the connecting rope passes the spout, still includes mounting bracket, connects rope and the drive rope rolling assembly of connecting the rope motion, connecting rope one end and mounting bracket connection, the rope rolling assembly includes reel, ratchet, pawl and drive spring, reel and frame rotate the connection, the connecting rope is kept away from the one end and the reel connection of mounting bracket, reel and ratchet fixed connection, drive spring can drive the reel and rotate, pawl and frame are articulated, the pawl can support tightly with the ratchet, works as when the connecting rope drives the mounting bracket and rises, drive spring's elastic potential energy reduces gradually, the connecting rope can twine in the week side of reel, pawl and ratchet lock. The application can improve the convenience of the lifting sensor.

Description

Mounting bracket of sensor for mine

Technical Field

The application relates to the field of mine safety detection devices, in particular to a mounting bracket of a sensor for a mine.

Background

The mine is at the mining in-process, and some poisonous and harmful gas that are blocked by the ore can be along with the exploitation of ore and fill gradually in the mine, need in time detect this part poisonous and harmful gas's content to conveniently in time force taking a breath to poisonous and harmful gas, need use the sensor that detects corresponding gas content during the detection, the sensor need install the top at the mine.

Among the correlation technique, the chinese utility model patent that the grant bulletin number is CN212246040U discloses a colliery sensor elevating gear in pit, and it includes the net piece, the sensor is installed to the bilateral symmetry of terminal box, the terminal fixedly connected with sensor bus of terminal, the upper end intermediate position of net piece is equipped with the rope card, the inside fixed winding that the arc was detained has the package to mould wire rope, the terminal fixedly connected with inflation couple of first pulley, the package moulds wire rope's intermediate position sliding connection has the second pulley, the package moulds wire rope's terminal fixed mounting has hand riser, the inside sliding mounting of round hole has the pivot, the peripheral fixed mounting of pivot has the I-shaped wheel, the left side fixed mounting of pivot has the rocker.

To the correlation technique among the above-mentioned, the inventor thinks that operating personnel uses the elevating gear installation sensor among the correlation technique in the narrower mine in partial space, because the space is comparatively narrow and small, the turning handle and the mine lateral wall of hand lift are close to, lead to the unable normal rotation of hand lift, and the convenience that promotes the sensor is relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to improve the convenience of promoting the sensor, this application provides a mounting bracket of sensor for mine.

The application provides a mounting bracket of sensor for mine adopts following technical scheme:

the utility model provides a mounting bracket of sensor for mine, includes the frame, the spout has been seted up in the frame, connect the rope and pass the spout, still include the serving subassembly of mounting bracket, connection rope and drive connection rope motion, connection rope one end and mounting bracket connection, the serving subassembly includes take-up pulley, ratchet, pawl and drive spring, take-up pulley and frame rotate to be connected, the one end and the take-up pulley connection of mounting bracket are kept away from to the connection rope, take-up pulley and ratchet fixed connection, drive spring can drive the take-up pulley and rotate, pawl and frame are articulated, the pawl can support tightly with the ratchet, works as when the connection rope drives the mounting bracket rise, drive spring drives the take-up pulley and rotates, the winding of connection rope is in the week side of take-up pulley, pawl and ratchet lock.

By adopting the technical scheme, an operator places a sensor to be hung on the mounting frame, the hand of the operator penetrates through the sliding groove to pull the connecting rope to move towards one side of the winding wheel, the acting force received by the connecting rope from the mounting frame is reduced, meanwhile, the winding wheel is driven by the driving spring to rotate, the winding wheel rotates, the connecting rope section is wound around the winding wheel by the winding wheel, the ratchet wheel rotates along with the winding wheel, after the operator releases the hand, the pawl supports the rotated ratchet wheel tightly, the rotating state of the winding wheel is stopped, the operator stretches the hand to the higher side of the connecting rope, the connecting rope is pulled to move towards the winding wheel, the winding wheel continues to wind the longer connecting rope around the circumference of the winding wheel, the sensor gradually rises along with the movement of the mounting frame, the possibility that the connecting rope is pulled by the hand lifter can be effectively reduced, and the possibility that the use place of the hand lifter is limited is reduced, the convenience of the lift sensor is improved.

Optionally, a driving part is arranged in the chute, and the driving part can drive the connecting rope to move towards one side of the winding wheel.

Through adopting above-mentioned technical scheme, operating personnel hold in deepening the spout with the hand, hold and hold driver part and come the pulling and connect the rope, reduce operating personnel's the direct pulling possibility of connecting the rope of hand, reduce operating personnel pulling and connect the rope and lead to injured possibility, conveniently connect the rope and drive the mounting bracket and move towards the frame top.

Optionally, the driving part comprises a sliding block and a abutting piece, the length of the sliding block is smaller than that of the sliding groove, the sliding block is provided with a sliding cavity, the connecting rope penetrates through the sliding cavity, the sliding block is connected with the connecting rope in a sliding mode, the sliding block side wall is provided with an abutting groove, the abutting groove is communicated with the sliding cavity, the abutting piece is located in the abutting groove, and the abutting piece is connected with the sliding block in a sliding mode.

Through adopting above-mentioned technical scheme, operating personnel holds the slider, through pressing the piece of keeping to, it follows to keep to tight groove and towards sliding chamber one side motion to support tight piece, support tight piece and the smooth intracavity connection rope and support tightly, operating personnel is to spout below pulling slider, connect the rope and move towards the coiling wheel under the combined action of slider and the piece of keeping to tight, the coiling wheel will be connected the rope winding behind its week side, operating personnel loosens the piece of keeping to, the fixed state of slider and connection rope is relieved, the pawl supports the ratchet tightly, operating personnel pushes the slider towards the spout top, operating personnel presses the piece of keeping to press once more, support tight piece and connection rope and support tightly, the rope is connected in the repeated pulling, it rises to connect the rope to connect, improve the security that operating personnel pulled connection rope motion, improve the reliability that the sensor rose.

Optionally, the slider includes a fixing member and a fastening member, the fixing member and the fastening member are detachably connected, the abutting groove is formed in the fastening member, and the abutting member is slidably connected to the fastening member.

Through adopting above-mentioned technical scheme, because long-time pressing to tight piece can lead to supporting the cooperation degree decline of piece and slider, after supporting tight piece and taking place wearing and tearing, operating personnel dismantles mounting and buckling piece, and mounting and buckling piece part are convenient to be changed wearing and tearing to tight piece, improve to support the reliability that piece, mounting and buckling piece cooperation drove the motion of connecting the rope.

Optionally, the fixing part is provided with a guide groove, the opening direction of the guide groove is the same as the opening direction of the sliding groove, a guide rod is arranged in the sliding groove, the guide rod penetrates through the guide groove, and the guide rod is slidably connected with the fixing part.

Through adopting above-mentioned technical scheme, after operating personnel held the mounting, when the pulling mounting, the mounting slided along the guide bar, reduces operating personnel pulling and connects the wobbling possibility of rope, makes things convenient for operating personnel to connect the rope motion through holding mounting and buckling piece pulling, improves the reliability that the sensor rose.

Optionally, a holding groove is formed in one side, facing the outer side of the sliding block, of the abutting part, and a plurality of holding grooves are formed in the holding groove.

Through adopting above-mentioned technical scheme, through offering the groove of gripping in supporting the tight piece outside, can make things convenient for operating personnel's palm and the laminating of the groove of gripping, improve operating personnel and grip the comfort level of piece of holding, improve operating personnel and drive the convenience of connecting the rope motion through supporting the piece.

Optionally, a friction pad is arranged on one side of the abutting piece facing the connecting rope, and the friction pad and the abutting piece are detachably connected.

Through adopting above-mentioned technical scheme, support the tight piece and connect the rope and support tightly through the friction pad, can reduce to support the possibility that the piece is connected the rope friction and leads to the damage, improve to support when the use of piece is long, conveniently support the piece and drive and connect the rope motion, reduce to support the piece and connect the rope and support the gliding possibility of emergence after tightly.

Optionally, a shifting block is arranged on one side, away from the ratchet wheel, of the pawl, and the shifting block is fixedly connected with the pawl.

Through adopting above-mentioned technical scheme, the shifting block can make things convenient for operating personnel to drive the pawl motion, and injured possibility when reducing the fixed state of operating personnel unblock pawl and ratchet makes things convenient for sensor and mounting bracket to drive and connects the rope to the motion of frame below, makes things convenient for operating personnel to inspect the sensor of whereabouts.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the winding wheel, the driving spring, the ratchet wheel and the pawl, when an operator directly pulls the connecting rope to move towards one side of the winding wheel, the winding wheel is driven by the driving spring to wind the connecting rope around the winding wheel, when the operator loosens the connecting rope, the ratchet wheel is kept fixed under the propping of the pawl, the possibility that the winding wheel is driven by the connecting rope to rotate is reduced, the operator puts hands at different positions of the connecting rope, the operator continues to pull the connecting rope to move towards one side of the winding wheel, the winding wheel gradually winds the connecting rope around the periphery of the winding wheel, the connecting rope drives the mounting frame and the sensor to move towards the upper part of the rack, and compared with a mode that the hand-operated lifter is used for driving the sensor to ascend, the application place is higher, and the convenience for the movement of the sensor is higher;

2. the driving part is arranged in the chute, and an operator drives the connecting rope to move through the driving part, so that the possibility of palm injury caused by the fact that the operator directly grips the connecting rope to move is reduced, and the safety of the operator driving the mounting frame and the sensor to ascend through the connecting rope is improved;

3. the driving part comprises a sliding block and a clamping piece, an operator holds the hand at the periphery of the sliding block, the clamping piece is clamped through pressing, the clamping piece and the connecting rope in the sliding cavity are clamped, the operator pulls the clamping piece and the sliding block to drive the connecting rope to move, and the reliability of the sensor to move above the rack is improved.

Drawings

Fig. 1 is a schematic structural diagram of a mounting bracket of a mine sensor according to an embodiment of the present application.

Fig. 2 is a perspective cross-sectional view of a display rack, a connecting rope, a rope reel assembly and a drive member of a mounting bracket for a mine sensor according to an embodiment of the present application.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Description of reference numerals: 1. a frame; 101. a column; 1011. a chute; 102. a cross beam; 2. a mounting frame; 3. connecting ropes; 4. a rope winding assembly; 41. a winding wheel; 42. a ratchet wheel; 43. a pawl; 44. a drive spring; 5. a drive member; 51. a slider; 511. a fixing member; 512. a fastener; 52. an abutting piece; 521. a holding groove; 53. a slide chamber; 54. abutting against the groove; 55. a guide groove; 6. a guide bar; 7. a friction pad; 8. shifting blocks; 9. and a fixed pulley.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses installing support of sensor for mine. Referring to fig. 1, 2 and 3, the mounting bracket comprises a rack 1, a mounting rack 2, a connecting rope 3 and a rope winding assembly 4 for driving the connecting rope 3 to move, the rack 1 comprises a cross beam 102 and two upright posts 101, the cross beam 102 is horizontally arranged, the two upright posts 101 are both positioned below the cross beam 102, the two upright posts 101 are vertically arranged at intervals, the upright posts 101 are arranged in a hollow manner, the peripheral sides of the upright posts 101 are provided with chutes 1011, the chutes 1011 penetrate through the side walls of the upright posts 101, the upright posts 101 and the cross beam 102 are welded and fixed, and the cross beam 102 is rotatably connected with a fixed pulley 9; the mounting frame 2 is in a cuboid frame shape, the connecting rope 3 is a steel wire rope, one end of the connecting rope 3 is bound and fixed with the mounting frame 2, and the other end of the connecting rope 3 penetrates through the fixed pulley 9 and faces one side of the upright post 101; the rope winding assembly 4 comprises a winding wheel 41, a ratchet wheel 42, a pawl 43 and a driving spring 44, the winding wheel 41 is rotatably connected with the upright post 101 through a bearing, one end, far away from the mounting frame 2, of the connecting rope 3 is fixedly bound with the winding wheel 41, the ratchet wheel 42 and the winding wheel 41 are coaxially arranged, the ratchet wheel 42 and the winding wheel 41 are integrally formed, the driving spring 44 is a clockwork spring, one end of the driving spring 44 is fixedly clamped with the winding wheel 41, the other end of the driving spring 44 is fixedly clamped with the upright post 101, and when the mounting frame 2 is close to the cross beam 102, the elastic potential energy of the driving spring 44 is smaller; when the mounting bracket 2 is far away from the cross beam 102, the elastic potential energy of the driving spring 44 is larger; the pawl 43 is hinged with the frame 1, and the pawl 43 is abutted against the outer teeth of the ratchet wheel 42.

When the lifting sensor rises upwards, an operator firstly puts the sensor into the mounting frame 2, the hand of the operator passes through the chute 1011 to grasp the connecting rope 3, the operator pulls the connecting rope 3, the connecting rope 3 drives the mounting frame 2 and the sensor to move towards the beam 102, the distance between the hand of the operator and the winding wheel 41 is reduced, the winding wheel 41 is driven by the driving spring 44 to rotate, the winding wheel 41 winds the connecting rope 3 around the circumference, the elastic potential energy of the driving spring 44 is gradually reduced, the ratchet wheel 42 is driven by the winding wheel 41 to rotate, the pawl 43 and the ratchet wheel 42 are abutted tightly, the operator loosens the connecting rope 3, the operator stretches the hand to the upper part of the chute 1011, continues to grasp the connecting rope 3 and pulls the connecting rope 3 to move towards the winding wheel 41, and the connecting rope 3 is wound around the circumference of the winding wheel 41, the connecting rope 3 drives the mounting frame 2 to move towards one side of the cross beam 102, and the mounting frame 2 and the sensor ascend; when the sensor needs to be lowered, an operator unlocks the fixed state of the pawl 43 on the ratchet wheel 42, the connecting rope 3 drives the winding wheel 41 to rotate, the elastic potential energy of the driving spring 44 is increased, and the sensor and the mounting frame 2 move to one side far away from the cross beam 102, so that the sensor is convenient to overhaul by the operator. Compare in driving through hand riser and connect 3 motions of rope, this application can be applicable to the installation location of the sensor in narrow space, improves the suitability of installing support, improves the convenience that promotes the sensor.

Referring to fig. 2 and 3, in order to reduce the possibility of direct contact between the palm of an operator and the connecting rope 3, a driving part 5 for driving the connecting rope 3 to move towards one side of the winding wheel 41 is arranged in the sliding groove 1011, the driving part 5 comprises a sliding block 51 and a resisting part 52, the sliding block 51 is vertically arranged, the height of the sliding block 51 is smaller than that of the sliding groove 1011, a sliding cavity 53 is formed in the sliding block 51, the connecting rope 3 penetrates through the sliding cavity 53, the sliding cavity 53 is cylindrical, the sliding cavity 53 is arranged along the length direction of the sliding block 51, the sliding block 51 comprises a fixing part 511 and a buckling part 512, the fixing part 511 and the buckling part 512 are detachably connected through bolts, the sliding cavity 53 is located between the fixing part 511 and the buckling part 512, the resisting groove 54 is formed in the side wall of the buckling part 512, the resisting groove 54 penetrates through the fixing part of the buckling part 512, the resisting groove 54 is communicated with the sliding cavity 53, and the resisting part 52 is connected with 511 in a sliding manner. Operating personnel presses and presses retaining member 52, it slides along the orientation of seting up of abutting groove 54 to support retaining member 52, it laminates to support the inside connection rope 3 of retaining member 52 and smooth chamber 53, it will connect rope 3 and support tightly in smooth chamber 53 to support retaining member 52, operating personnel pulling slider 51, slider 51 drives and connects rope 3 and move towards winding wheel 41, winding wheel 41 will connect rope 3 winding week side, operating personnel loosens retaining member 52, operating personnel moves to spout 1011 top, operating personnel continues to stimulate through retaining member 52 and connects rope 3 and move towards winding wheel 41, it drives mounting bracket 2 and moves towards crossbeam 102 gradually to connect rope 3, operating personnel's palm injured possibility has been reduced, improve the security that operating personnel pulled sensor and mounting bracket 2 moved.

Referring to fig. 2 and 3, in order to improve the convenience of the operator for pulling the connecting rope 3 to move, a guide slot 55 is formed in the fixing member 511, the opening direction of the guide slot 55 is parallel to the opening direction of the sliding cavity 53, a guide rod 6 is arranged in the sliding slot 1011, and the guide rod 6 and the upright post 101 are integrally formed; the friction pad 7 is arranged on one side, facing the inner wall of the sliding cavity 53, of the abutting piece 52, the friction pad 7 is made of rubber, the friction pad 7 and the abutting piece 52 are detachably connected through bolts, a holding groove 521 is further formed in the outer side of the abutting piece 52, and the holding groove 521 is arranged at intervals along the arrangement direction of the abutting piece 52. When an operator drives the connecting rope 3 to move, the palm of the operator is attached to the abutting piece 52 through the holding groove 521, the operator presses the abutting piece 52, the abutting piece 52 drives the friction pad 7 to be attached to the connecting rope 3, the operator pulls the slider, the abutting piece 52 drives the connecting rope 3 to move towards one side of the winding wheel 41, when the friction pad 7 is worn due to long-time use, the operator firstly separates the fixing piece 511 and the buckling piece 512, the abutting piece 52 is separated from the buckling piece 512, the operator detaches the friction pad 7, connects the new friction pad 7 with the abutting piece 52, the abutting piece 52 is connected with the buckling piece 512, the buckling piece 512 and the fixing piece 511 are connected into a whole, the operator pulls the sliding block 51, the sliding block 51 slides along the guide rod 6, so that the connecting rope 3 drives the mounting frame 2 to move towards one side of the winding wheel 41, the holding groove 521 can improve the comfort level of the abutting piece 52 held by the operator, the friction pad 7 and the guide rod 6 can increase the stability of the movement of the connecting rope 3 driven by the operator, and improve the reliability of the movement of the connecting rope 3 pulled by the operator.

Referring to fig. 2 and 3, in order to facilitate the operator to overhaul the sensor, a shifting block 8 is arranged on one side of the pawl 43 away from the ratchet wheel 42, the shifting block 8 is long, the shifting block 8 and the pawl 43 are integrally formed, and an included angle between the shifting block 8 and the pawl 43 is 60 °. When the sensor needs to be overhauled, an operator pulls the shifting block 8 first, the shifting block 8 drives the pawl 43 to move towards one side far away from the ratchet wheel 42, the fixed state of the pawl 43 and the ratchet wheel 42 is released, the sensor and the mounting frame 2 drive the connecting rope 3 to move towards one side of the cross beam 102, the winding wheel 41 rotates, the elastic potential energy of the driving spring 44 is increased, and the operator can conveniently check the falling sensor.

The implementation principle of the mounting bracket of the sensor for the mine is as follows: when the lifting sensor rises upwards, an operator firstly puts the sensor into the mounting frame 2, the operator holds the sliding block 51 with hands, the fingers of the operator are attached to the abutting pieces 52 through the holding grooves 521, the sealing gasket is attached to the connecting rope 3, the operator pulls the sliding block 51, the sliding block 51 slides along the guide rod 6, the connecting rope 3 drives the mounting frame 2 and the sensor to move towards the cross beam 102, the winding wheel 41 is driven by the driving spring 44 to rotate, the winding wheel 41 winds the connecting rope 3 around the periphery of the winding wheel 41, the elastic potential energy of the driving spring 44 is gradually reduced, the ratchet wheel 42 is driven by the winding wheel 41 to rotate, the pawl 43 abuts against the ratchet wheel 42, the operator loosens the abutting pieces 52, the operator slides the sliding block 51 to extend to the upper part of the sliding groove 1011, the abutting pieces 52 continuously holds the abutting pieces 52 to drive the connecting rope 3 and pulls the connecting rope 3 to move towards the winding wheel 41, the connecting rope 3 is wound around the winding wheel 41, the connecting rope 3 drives the mounting frame 2 to move towards one side of the cross beam 102, and the mounting frame 2 and the sensor ascend; when the sensor needs to be lowered, an operator dials the shifting block 8, the pawl 43 is in fixed state contact with the ratchet wheel 42, the connecting rope 3 drives the winding wheel 41 to rotate, the elastic potential energy of the driving spring 44 is increased, and the sensor and the mounting frame 2 move to one side far away from the cross beam 102; when the friction pad 7 is damaged by friction, an operator firstly detaches the fixing part 511 and the fastening part 512 to separate the fastening part 512 from the abutting part 52, the operator replaces the worn friction pad 7 and then mounts the abutting part 52, the operator pulls the sliding block 51 and the abutting part 52, and the connecting rope 3 gradually drives the mounting frame 2 and the sensor to move.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A mounting bracket of sensor for mine, includes frame (1), its characterized in that: still include mounting bracket (2), connect rope (3) and the drive and connect rope (3) moving serving subassembly (4), spout (1011) have been seted up on frame (1), connect rope (3) and pass spout (1011), connect rope (3) one end and mounting bracket (2) and connect, serving subassembly (4) including winding wheel (41), ratchet (42), pawl (43) and driving spring (44), winding wheel (41) and frame (1) rotate the connection, connect rope (3) keep away from the one end and the winding wheel (41) connection of mounting bracket (2), winding wheel (41) and ratchet (42) fixed connection, driving spring (44) can drive winding wheel (41) and rotate, pawl (43) and frame (1) are articulated, pawl (43) can support tightly with ratchet (42), when connecting rope (3) and driving mounting bracket (2) and rising, the elastic potential energy of the driving spring (44) is gradually reduced, the connecting rope (3) can be wound on the peripheral side of the winding wheel (41), and the pawl (43) is buckled with the ratchet wheel (42).

2. The mounting bracket for the mine sensor of claim 1, wherein: a driving part (5) is arranged in the sliding groove (1011), and the driving part (5) can drive the connecting rope (3) to move towards one side of the winding wheel (41).

3. The mounting bracket for the mine sensor of claim 2, wherein: the driving part (5) comprises a sliding block (51) and a abutting part (52), the length of the sliding block (51) is smaller than that of the sliding groove (1011), a sliding cavity (53) is formed in the sliding block (51), the connecting rope (3) penetrates through the sliding cavity (53), the sliding block (51) is in sliding connection with the connecting rope (3), an abutting groove (54) is formed in the side wall of the sliding block (51), the abutting groove (54) is communicated with the sliding cavity (53), the abutting part (52) is located in the abutting groove (54), and the abutting part (52) is in sliding connection with the sliding block (51).

4. A mounting bracket for a mine sensor as defined in claim 3, wherein: the sliding block (51) comprises a fixing piece (511) and a buckling piece (512), the fixing piece (511) is detachably connected with the buckling piece (512), the abutting groove (54) is formed in the buckling piece (512), and the abutting piece (52) is connected with the buckling piece (512) in a sliding mode.

5. The mounting bracket for the mine sensor of claim 4, wherein: the fixing piece (511) is provided with a guide groove (55), the opening direction of the guide groove (55) is the same as that of the sliding groove (1011), a guide rod (6) is arranged in the sliding groove (1011), the guide rod (6) penetrates through the guide groove (55), and the guide rod (6) is connected with the fixing piece (511) in a sliding mode.

6. A mounting bracket for a mine sensor as defined in claim 3, wherein: the side, facing the outer side of the sliding block (51), of the abutting piece (52) is provided with a holding groove (521), and the holding grooves (521) are arranged in a plurality.

7. A mounting bracket for a mine sensor as defined in claim 3, wherein: the side of the abutting piece (52) facing the connecting rope (3) is provided with a friction pad (7), and the friction pad (7) is detachably connected with the abutting piece (52).

8. The mounting bracket for the mine sensor of claim 1, wherein: one side of the pawl (43) far away from the ratchet wheel (42) is provided with a shifting block (8), and the shifting block (8) is fixedly connected with the pawl (43).