CN219466096U - Crushing pick - Google Patents

Abstract

The application discloses crushing pick includes: a pick body comprising an armrest; the switch handle is connected with the pick body and is at least partially arranged in the handrail; when external force is applied, the switch handle moves to switch the pick body from rest to operation, the external force is removed, and the switch handle resets to stop the operation of the pick body; the safety valve is arranged in the movement direction of the switch handle and at least partially arranged in the handrail; the relief valve includes: the base is fixed on the armrest and is provided with a containing space; the valve rod is inserted in the accommodating space, one end exposed out of the base extends from the inside of the handrail to the outside of the handrail, and a first flange is arranged on the periphery of the valve rod; when no force is applied to the exposed end of the valve rod, the first flange is at least partially outside the base, the distance between the first flange and the switch handle is smaller than a distance threshold, and when a force towards the base is applied to the exposed end of the valve rod to enable the first flange to enter the base, the distance between the first flange and the switch handle is larger than or equal to the distance threshold. Through the mode, the safety of the crushing pick can be improved.

Description

Crushing pick

Technical Field

The application relates to the field of mechanical equipment, in particular to a crushing pick.

Background

The crushing pick can quickly and effectively remove local barriers, so that the crushing pick is widely applied to the fields of pavement crushing, building removal, decoration and the like.

The hand-held crushing pick is generally provided with a switch handle for controlling the crushing pick to be stationary or running. However, in the actual operation process, an operator easily touches the switch handle by mistake, so that the crushing pick runs accidentally, and great potential safety hazards exist.

Disclosure of Invention

The utility model aims to overcome the existing defects and provide the crushing pick which can improve the operation safety of the crushing pick.

In order to solve the technical problems, one technical scheme adopted by the application is as follows: provided is a crushing pick comprising: a pick body comprising an armrest; the switch handle is connected with the pick body and is at least partially arranged in the handrail; when the external force is applied, the switch handle moves to enable the state of the pick body to be switched from static state to operation, and when the external force is removed, the switch handle resets to enable the pick body to stop operation; a safety valve disposed in a movement direction of the switch handle, and at least partially disposed inside the armrest; the relief valve includes: the base is fixed on the handrail and is provided with a containing space; a valve rod inserted in the accommodating space and one end exposed outside the base extends from the inside of the handrail to the outside of the handrail, and a first flange is arranged on the periphery of the valve rod; when no acting force is applied to the exposed end of the valve rod, the first flange is at least partially positioned outside the base, the distance between the first flange and the switch handle is smaller than a distance threshold, and when pressure towards the base is applied to the exposed end of the valve rod to enable the first flange to enter the base, the distance between the first flange and the switch handle is larger than or equal to the distance threshold.

In the condition of prior art, the beneficial effect of this application is: the crushing pick comprises a switch handle and a safety valve. Safety valve, set up in the direction of movement of switch handle, include: the base is fixed on the armrest and is provided with a containing space; the valve rod is inserted in the accommodating space, one end exposed out of the base extends from the inside of the handrail to the outside of the handrail, and a first flange is arranged on the periphery of the valve rod; when no force is applied to the exposed end of the valve rod, the first flange is at least partially positioned outside the base, the distance between the first flange and the switch handle is smaller than a distance threshold, and when pressure towards the base is applied to the exposed end of the valve rod to enable the first flange to enter the base, the distance between the first flange and the switch handle is larger than or equal to the distance threshold. Through the technical scheme, when the acting force is not applied to the exposed end of the valve rod, the first flange is at least partially positioned outside the base and positioned on the movement path of the switch handle, and the first position of the switch handle in the pick body static state is blocked from moving towards the second position in the pick body running state, so that the safety risk of unexpected running of the pick body caused by mistakenly touching the switch handle by an operator can be reduced, the use safety of the pick body is improved, and the safety hidden trouble is reduced. When pressure towards the base is applied to the exposed end of the valve rod to enable the first flange to enter the base, the switch handle can move from a first position in a pick static state to a second position in a pick running state, so that normal operation is achieved, and the crushing pick is simple in structure and convenient for operators to operate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic structural view of an embodiment of a crushing pick of the present application;

FIG. 2 is a schematic diagram of an embodiment of the safety valve of FIG. 1 when closed;

FIG. 3 is a cross-sectional view of an embodiment of the relief valve and switch handle of FIG. 1 in the axial direction of the valve stem when the relief valve is closed;

FIG. 4 is a cross-sectional view of an embodiment of the relief valve and switch handle of FIG. 3 in the axial direction of the valve stem with the relief valve open;

FIG. 5 is a schematic view of an embodiment of the switch handle and safety valve of FIG. 1 with a relief slot in the switch handle;

FIG. 6 is a front view of the switch handle of FIG. 5 in direction A;

FIG. 7 is a schematic view of another embodiment of the switch handle of FIG. 1 with a relief slot;

fig. 8 is a cross-sectional view of the stop collar of fig. 2.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The application provides a crushing pick, please refer to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of the crushing pick of the application, and fig. 2 is a schematic structural diagram of an embodiment of the crushing pick of fig. 1 when a safety valve is closed, wherein the crushing pick comprises a pick body 1, a switch handle 2 and a safety valve 3.

The pick body 1 comprises an armrest 11, and an operator can hold the armrest 11 to control the stability of the operation of the crushing pick when the crushing pick is operated.

The switch handle 2 is connected with the pick body 1, and the switch handle 2 is at least partially arranged inside the armrest 11; when external force is applied, the switch handle 2 moves to switch the state of the pick body 1 from static to running, and when the external force is removed, the switch handle 2 resets to stop the pick body 1.

The safety valve 3 is disposed in the movement direction D1 of the switch handle 2, and the safety valve 3 is at least partially disposed inside the armrest 11. Referring again to fig. 2, the safety valve 3 includes a base 31 and a valve stem 32. The base 31 is fixed on the armrest 11, and the base 31 is provided with a containing space 311. In some embodiments, the circumference of the base 31 may be provided with a first thread, the armrest 11 may be provided with a through hole corresponding to the position of the base 31, the inside of the through hole may be provided with a second thread, and the base 31 and the armrest 11 may be aligned and engaged by the first thread and the second thread. In other certain embodiments, the circumference of the base 31 may be provided with a clamping protrusion, the armrest 11 may be provided with a through hole corresponding to the position of the base 31, the inner side of the through hole may be provided with a clamping groove, and the base 31 and the armrest 11 may be aligned and clamped by the clamping protrusion and the clamping groove. The specific fixing manner of the base 31 and the armrest 11 is not limited in this application, and may be selected by those skilled in the art according to actual needs. The valve stem 32 is inserted in the accommodating space 311 and one end L1 exposed to the outside of the base 31 extends from the inside of the armrest 11 to the outside of the armrest 11, and the outer periphery of the valve stem 32 is provided with a first flange 321. Referring to fig. 3, fig. 3 is a cross-sectional view of an embodiment of the safety valve and the switch handle in the axial direction of the valve rod when the safety valve is closed in fig. 1, when no force is applied to the exposed end L1 of the valve rod 32, the first flange 321 is at least partially located outside the base 31, and the distance between the first flange 321 and the switch handle 2 is smaller than the distance threshold, and referring to fig. 4, fig. 4 is a cross-sectional view of an embodiment of the safety valve and the switch handle in the axial direction of the valve rod when the safety valve is opened in fig. 3, when a pressure is applied to the exposed end L1 of the valve rod 32 toward the base 31 to make the first flange 321 enter the base 31, the distance between the first flange 321 and the switch handle 2 is greater than or equal to the distance threshold. In some embodiments, the first flange 321 may only partially enter the base 31, so long as it is ensured that the portion of the first flange 321 that is exposed to the base 31 does not impede the movement of the switch handle 2 from the first position, in which the pick 1 is stationary, to the second position, in which the pick 1 is in operation.

The distance between the first flange 321 and the switch handle 2 may be a linear distance between a first reference position on the first flange 321 and a second reference position on the switch handle 2, which may be obtained by a person skilled in the art, and the person skilled in the art may select the first reference position and the second reference position according to actual needs. For example, referring to fig. 3 and 4, in some embodiments, the distance between the first flange 321 and the switch handle 2 may be the distance between a side surface a1 of the switch handle 2 away from the exposed end L1 of the valve stem 32 and a side surface a2 of the first flange 321 away from the exposed end L1 of the valve stem 32 in the axial direction D2 of the valve stem 32. The person skilled in the art can choose the distance threshold according to the actual structure of the crushing pick, and the specific value of the distance threshold is not limited in this application. For example, referring to fig. 3 and 4, the distance threshold may be a width x of the first flange 321 in the axial direction of the valve stem 32. In fig. 3, the first distance x1 between the first flange 321 and the switch handle 2 is smaller than x, the first flange 321 blocks movement of the switch handle 2 in the direction D3, and the switch handle 2 can only move in the direction D3 to the position shown in fig. 3, at which point the pick 1 is stationary. In fig. 4, the second distance x2 between the first flange 321 and the switch handle 2 is greater than x, and the first flange 321 is far away from the switch handle 2, so that the movement of the switch handle 2 in the direction D3 cannot be blocked, and the switch handle 2 can continue to move toward the valve rod 32 in the direction D3 on the basis of the position shown in fig. 3, so that the pick 1 can be controlled to operate.

By the above manner, when no acting force is applied to the exposed end L1 of the valve rod 32, the first flange 321 is at least partially located outside the base 31 and located on the movement path of the switch handle 2, so that the switch handle 2 is prevented from moving from the first position when the pick 1 is in the static state to the second position when the pick 1 is in the running state, thereby reducing the safety risk of the pick 1 caused by the misoperation of the operator to the switch handle 2 and improving the use safety of the pick 1. When pressure is applied to the exposed end L1 of the valve rod 32 towards the base 31 to enable the first flange 321 to enter the base 31, the first flange 321 is located outside the movement path of the switch handle 2, and the switch handle 2 can move from a first position when the pick 1 is in a static state to a second position when the pick 1 is in a running state without being blocked by the first flange 321, so that an operator can operate the switch handle 2 to control the static and running of the pick 1, and normal operation is realized. The mode is simple in structure and convenient for operators to operate.

Referring again to fig. 2, the safety valve 3 may further include an elastic member 33 according to some embodiments of the present application. The elastic member 33 is elastically supported between the base 31 and the valve stem 32, and the elastic member 33 may be a member having compressibility and resiliency available to those skilled in the art, alternatively, the elastic member 33 may be a spring, a rubber ball, a rubber diaphragm, a rubber ring, or the like. When pressure is applied to the exposed end L1 of the valve rod 32 toward the base 31, the elastic member 33 is compressed to enable the first flange 321 to enter the base 31, and when the applied pressure is removed, the elastic member 33 is reset to enable the distance between the first flange 321 and the switch handle 2 to be smaller than a distance threshold.

The elastic piece 33 can improve the stability of the safety valve 3 in the operation process, and when the pressure towards the base 31 is applied to the exposed end L1 of the valve rod 32 to withdraw, the elastic piece 33 can rebound automatically, so that the first flange 321 reenters the movement path of the switch handle 2 to continuously block the movement of the switch handle 2, and the use convenience and safety of the breaking pick are improved.

According to some embodiments of the present application, the switch handle 2 is provided with a avoidance groove 21, please refer to fig. 5-6, fig. 5 is a schematic structural diagram of an embodiment of the switch handle and the safety valve when the switch handle in fig. 1 has the avoidance groove, fig. 6 is a front view of the switch handle in the direction a in fig. 5, and when the distance between the first flange 321 and the switch handle 2 is greater than or equal to the distance threshold, the avoidance groove 21 and the valve rod 32 are aligned and clamped along with the movement of the switch handle 2. On the length direction D4 of the switch handle 2, the size of the avoidance groove 21 can be larger than the diameter of the valve rod 32 and smaller than the outer diameter of the first flange 321, so that when the distance between the first flange 321 and the switch handle 2 is smaller than a distance threshold value, the first flange 321 can block the avoidance groove 21 from being aligned and clamped with the valve rod 32, and when the distance between the first flange 321 and the switch handle 2 is larger than or equal to the distance threshold value, the avoidance groove 21 can be aligned and clamped with the valve rod 32. The avoidance groove 21 can provide more movement space for the switch handle 2, prolongs the movement path of the switch handle 2, is favorable for distinguishing a first position of the switch handle 2 in a pick body 1 static state from a second position of the switch handle 1 in a running state, improves operation experience sense, and reduces probability of misoperation. And dodge the groove 21 and can play certain fixed action to switch handle 2 after counterpoint joint with valve rod 32, improve broken pick structural stability.

The shape and size of the escape groove 21 can be designed by those skilled in the art according to actual needs. For example, referring to fig. 5 and 6, the relief groove 21 may be a square groove in accordance with some embodiments of the present application. For another example, referring to fig. 7, fig. 7 is a schematic structural diagram of another embodiment of the switch handle in fig. 1 when the switch handle has a relief groove, in a first direction D5 in which the armrest 11 points to the switch handle 2, the relief groove 21 may sequentially include a first sub-groove 211 and a second sub-groove 212 that are mutually communicated, and as the switch handle 2 moves, the first sub-groove 211 is aligned with the first flange 321, and the second sub-groove 212 is aligned with the valve stem 32. The size of the first sub-slot 211 may be larger than the size of the second sub-slot 212 in the direction D4 in which the length of the switch handle 2 is located. Thus, with the movement of the switch handle 2, the first sub-groove 211 is aligned and clamped with the first flange 321, so that the movement of the switch handle 2 is increased by the first sub-groove 211. When the distance between the first flange 321 and the switch handle 2 is smaller than the distance threshold, the first flange 321 can be aligned and clamped with the first sub-groove 211, and the second sub-groove 212 is blocked from being aligned and clamped with the valve rod 32, and when the distance between the first flange 321 and the switch handle 2 is greater than or equal to the distance threshold, the second sub-groove 212 can be aligned and clamped with the valve rod 32. So, even the relief valve 3 is in the closed state, switch handle 2 also can carry out certain activity, and the operating personnel of being convenient for responds in time to the unusual circumstances that switch handle 2 such as switch handle 2 blocks or hydraulic pressure returns the top and can not move at all, has improved broken pick's safety in utilization.

The shape and size of the first and second sub-grooves 211 and 212 may be selected by those skilled in the art according to actual needs. For example, in accordance with some embodiments of the present application, the valve stem 32 may be circular in cross-section and the first flange 321 may be annular in cross-section; the side surface of the first sub groove 211 and/or the second sub groove 212 away from the safety valve 3 is arc-shaped, and the arc-shape protrudes toward the switch handle 2. So improved the shape matching degree of first sub tank 211 and first flange 321 and the shape matching degree of second sub tank 212 and valve rod 32, be favorable to reducing the non-benign collision and the wearing and tearing of switch handle 2 and relief valve 3 in the use of broken pick, prolonged the life of switch handle 2 and relief valve 3. In some embodiments, the arc-shaped diameter of the first sub-groove 211 may be slightly greater than or equal to the outer diameter of the first flange 321, and the arc-shaped diameter of the second sub-groove 212 may be slightly greater than or equal to the diameter of the valve rod 32 and less than the outer diameter of the first flange 321, so that the shape matching degree of the avoidance groove 21 and the safety valve 3 may be improved, which is beneficial to reducing the damage of the safety valve 3 to the switch handle 2 at the avoidance groove 21 in the use process of the safety valve 3, and prolonging the service life of the breaking pick.

Referring to fig. 2, 3 and 8, fig. 8 is a cross-sectional view of the stop collar in fig. 2, the safety valve 3 may further include a stop collar 34, the stop collar 34 is located inside the armrest 11 and provided with a stop channel 341, an end L2 of the valve rod 32 exposed outside the base 31 passes through the stop collar 34 via the stop channel 341, and the stop channel 341 includes a first sub-channel 3411 and a second sub-channel 3412; the outer periphery of the valve rod 32 is provided with a second flange 322 positioned inside the stop collar 34, the second flange 322 is positioned in the first sub-channel 3411, and the outer diameter of the second flange 322 is larger than the diameter of the second sub-channel 3412, so that the second flange 322 is limited in the first sub-channel 3411. In this way, when the pressure applied to the exposed end L1 of the valve rod 32 toward the base 31 is removed and the valve rod 32 moves toward the side away from the accommodating space 311, the valve rod 32 is prevented from being flushed out of the armrest 11 due to the resilience force of the elastic member 33, so that the structural stability and the use safety of the breaking pick are further increased.

In accordance with some embodiments of the present application, referring to fig. 2 and 3, the safety valve 3 may further include a valve stem cap 35. The valve stem cap 35 is located outside the armrest 11 and connected to an end of the valve stem 32, and the valve stem cap 35 includes a stem portion 351 connected to the valve stem 32 and a cap portion 352 connected to the stem portion 351, the size of the cap portion 352 being larger than the size of the stem portion 351. The cap 352 increases the contact area of the operator's finger with the safety valve 3, facilitating the operator's depression of the cap 352 to control the movement of the valve stem 32. In addition, because the size of the cap portion 352 is larger than that of the rod portion 351, the cap portion 352 can also play a limiting role on the valve rod 32, the probability that an operator excessively presses the valve rod 32 to eject the base 31 from the armrest 11 is reduced, and the stability and the use safety of the breaking pick structure are improved. In some embodiments, the side of the cap 352 facing away from the armrest 11 may be arcuate, which may facilitate reducing the pain associated with the fingers of an operator pressing the valve stem 32 and improving the operational experience.

Referring to fig. 1 in conjunction with fig. 5, according to some embodiments of the present application, switch handle 2 may include a wrench 22 and a trigger 23. The wrench 22 is located outside the handrail 11; the trigger 23 comprises a connecting part 231 positioned inside the handrail 11 and rotationally connected with the handrail 11, and a first extending part 232 and a second extending part 233 which are connected with the connecting part 231, wherein the first extending part 232 is connected with the wrench 22, and when external force is applied on the wrench 22, the connecting part 231 rotates relative to the handrail 11 so that the first extending part 232 and the second extending part 233 respectively move towards two opposite directions; wherein the safety valve 3 is located in the movement direction of the first extension 232. So can reduce the installation space of relief valve 3, improve broken pick structure's compactibility, and be favorable to operating personnel to carry out single hand operation to switch handle 2 and relief valve 3, improved broken pick's convenience of use.

According to some embodiments of the present application, referring to fig. 1, the crushing pick further includes a transmission member 4, an oil inlet 51, an oil outlet 52, a working oil inlet 53, a working oil outlet 54, and a valve core 6.

The transmission piece 4 is rotationally connected with the pick body 1 of the crushing pick through a transmission piece rotating mechanism; one end 41 of the transmission member 4 abuts against the second extension 233, and when the trigger 23 is rotated, the second extension 233 moves, thereby driving the transmission member 4 to rotate in a direction opposite to the rotation of the trigger 23.

The oil inlet 51 and the oil outlet 52 are respectively communicated with an oil inlet pipeline and an oil outlet pipeline, and are communicated with an external hydraulic power station.

A spool 6 including a third flange 61, the third flange 61 being disposed around the spool 6; one end 62 of the valve core 6 is movably connected with the transmission piece 4; when the transmission member 4 rotates, the valve core 6 can be driven to reciprocate between the rest position and the running position. When the switch handle 2 moves to the first position where the crushing pick is stationary, the valve core 6 is indirectly driven to move to the stationary position as shown in fig. 1, the third flange 61 seals the oil inlet 51, hydraulic oil cannot enter the pick body 1 from the working oil inlet 53, and at this time, the pick body 1 is stationary. When the switch handle 2 moves to the second position where the pick body 1 operates toward the armrest 11, the switch handle 2 indirectly drives the valve core 6 to move to the operating position toward the side far away from the armrest 11, at least part of the oil inlet 51 is exposed from the third flange 61, the oil inlet 51 is communicated with the working oil inlet 53, the oil outlet 52 is communicated with the working oil outlet 54, and hydraulic oil can enter the pick body 1 through the working oil inlet 53, so that the pick body 1 is driven to operate.

According to some embodiments of the present application, referring to fig. 5 in conjunction with fig. 1, the switch handle 2 includes a wrench 22 and a trigger 23, the wrench 22 and the trigger 23 are connected by a connection block 24, and in a first direction D5 of the armrest 11 pointing toward the switch handle 2, a height of the connection block 24 is greater than a height of the avoidance groove 21. So, can increase the distance between switch handle 2 and the handrail 11, provide safe distance for operating personnel's operation, effectively improve switch handle 2 by the first position when the 1 quiescent condition of pick towards the second position when the 1 running condition of pick when moving switch handle 2 and handrail 11 between the distance too little and cause the operating personnel's hand to be pressed from both sides the problem of damaging by switch handle 2 and handrail 11, improved broken pick's operation experience sense and security.

According to some embodiments of the present application, referring to fig. 5, the connection portion 231 is rotatably connected to the armrest 11 through the elastic pin 7, and the valve stem 32 is disposed parallel to the elastic pin 7. In this way, the movement direction of the switch handle 2 can be axially perpendicular to the valve rod 32 of the safety valve 3, so that the compactness and the neatness of the internal structure of the crushing pick are improved, the size of the crushing pick is reduced, and the crushing pick is convenient to maintain and repair.

From the above, the crushing pick of the present utility model comprises: a pick body comprising an armrest; the switch handle is connected with the pick body and is at least partially arranged in the handrail; when the external force is applied, the switch handle moves to switch the state of the pick body from static to running, and when the external force is removed, the switch handle resets to stop the pick body; the safety valve is arranged in the movement direction of the switch handle, and at least part of the safety valve is arranged in the armrest; the relief valve includes: the base is fixed on the armrest and is provided with a containing space; the valve rod is inserted in the accommodating space, one end exposed out of the base extends from the inside of the handrail to the outside of the handrail, and a first flange is arranged on the periphery of the valve rod; when no force is applied to the exposed end of the valve rod, the first flange is at least partially positioned outside the base, the distance between the first flange and the switch handle is smaller than a distance threshold, and when pressure towards the base is applied to the exposed end of the valve rod to enable the first flange to enter the base, the distance between the first flange and the switch handle is larger than or equal to the distance threshold. Through the technical scheme, when the acting force is not applied to the exposed end of the valve rod, the first flange is at least partially positioned outside the base and positioned on the movement path of the switch handle, and the first position of the switch handle in the pick body static state is blocked from moving towards the second position in the pick body running state, so that the safety problem caused by the fact that an operator mistakenly touches the switch handle to cause the pick body to run can be solved, the use safety of the pick body is improved, and the potential safety hazard is reduced. When exerting the pressure towards the base to the naked one end of valve rod and making first flange get into in the base, can realize normal operation, this broken pick simple structure, and the operating personnel of being convenient for operate.

The foregoing is only the embodiments of the present application, and not the patent scope of the present application is limited by the foregoing description, but all equivalent structures or equivalent processes using the contents of the present application and the accompanying drawings, or directly or indirectly applied to other related technical fields, which are included in the patent protection scope of the present application.

Claims (10)

1. A crushing pick, comprising:

a pick body comprising an armrest;

the switch handle is connected with the pick body and is at least partially arranged in the handrail; when the external force is applied, the switch handle moves to enable the state of the pick body to be switched from static state to operation, and when the external force is removed, the switch handle resets to enable the pick body to stop operation;

a safety valve disposed in a movement direction of the switch handle, and at least partially disposed inside the armrest; the relief valve includes:

the base is fixed on the handrail and is provided with a containing space;

a valve rod inserted in the accommodating space and one end exposed outside the base extends from the inside of the handrail to the outside of the handrail, and a first flange is arranged on the periphery of the valve rod;

when no acting force is applied to the exposed end of the valve rod, the first flange is at least partially positioned outside the base, the distance between the first flange and the switch handle is smaller than a distance threshold, and when pressure towards the base is applied to the exposed end of the valve rod to enable the first flange to enter the base, the distance between the first flange and the switch handle is larger than or equal to the distance threshold.

2. The breaking pick of claim 1, wherein the safety valve further comprises:

an elastic piece elastically supported between the base and the valve rod;

when pressure is applied to the exposed end of the valve rod towards the base, the elastic piece is compressed to enable the first flange to enter the base, and when the applied pressure is removed, the elastic piece is reset to enable the distance between the first flange and the switch handle to be smaller than the distance threshold value.

3. The breaking pick of claim 1, wherein the switch handle is provided with a relief groove that is aligned with the valve stem as the switch handle moves when the distance between the first flange and the switch handle is greater than or equal to the distance threshold.

4. A crushing pick according to claim 3, wherein in a first direction in which the armrest is directed toward the switch handle, the relief slot comprises, in sequence, a first sub-slot and a second sub-slot in communication with each other, the first sub-slot being in alignment-engagement with the first flange and the second sub-slot being in alignment-engagement with the valve stem as the switch handle moves.

5. A crushing pick according to claim 4, wherein,

the cross section of the valve rod is circular, and the cross section of the first flange is a circular ring;

the surface of one side of the first sub groove and/or the second sub groove far away from the safety valve is arc-shaped, and the arc-shaped protrudes towards the switch handle.

6. A crushing pick according to claim 3, wherein,

the switch handle comprises a spanner and a trigger, the spanner and the trigger are connected through a connecting block, the handrail points to the first direction of the switch handle, and the height of the connecting block is larger than that of the avoidance groove.

7. The breaking pick of claim 1, wherein the safety valve further comprises a stop collar positioned inside the armrest and provided with a stop passage through which an end of the valve stem exposed outside the base passes, the stop passage comprising a first sub-passage and a second sub-passage;

the periphery of the valve rod is provided with a second flange positioned in the limiting sleeve, the second flange is positioned in the first sub-channel, and the outer diameter of the second flange is larger than the diameter of the second sub-channel, so that the second flange is limited in the first sub-channel.

8. The breaking pick of claim 7, wherein the safety valve further comprises:

the valve rod cap is located outside the handrail and connected with the end portion of the valve rod, the valve rod cap comprises a rod portion connected with the valve rod and a cap portion connected with the rod portion, and the size of the cap portion is larger than that of the rod portion.

9. A crushing pick according to any one of claims 1 to 8, wherein the switch handle comprises:

a wrench positioned outside the armrest;

a trigger including a connection portion inside the armrest and rotatably connected to the armrest, and first and second extension portions connected to the connection portion, the first extension portion being connected to the wrench, the connection portion being rotated relative to the armrest when an external force is applied to the wrench, so that the first and second extension portions are respectively moved in two opposite directions;

wherein the relief valve is located in the direction of movement of the first extension.

10. A crushing pick according to claim 9, wherein the connection is pivotally connected to the armrest by a resilient pin, and the valve stem is disposed parallel to the resilient pin.