CN114982989B

CN114982989B - Automatic rice cake beating machine

Info

Publication number: CN114982989B
Application number: CN202210379978.8A
Authority: CN
Inventors: 许福军; 牛海渊; 黄初升
Original assignee: Qingdao Meiwei Food Co ltd
Current assignee: Qingdao Meiwei Food Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2023-08-08
Anticipated expiration: 2042-04-12
Also published as: CN114982989A

Abstract

The invention discloses an automatic rice cake beating machine, which comprises a rice cake beating machine main body and a plurality of threaded holes formed in the rice cake beating machine main body, wherein the rice cake beating machine main body is provided with a water outlet adjusting component for automatically discharging water according to requirements when a rice cake adheres to a hammer head and closing a water outlet when the rice cake adheres to the hammer head, and the automatic rice cake beating machine is different from the prior art, so that a maker can avoid the phenomenon of subjective manual water adding after the rice cake adheres to the hammer head main body when beating the rice cake, automatically discharges water according to requirements when the rice cake adheres to an arc-shaped hammer plate through the water outlet adjusting component and closes the water outlet when the rice cake adheres to the hammer head, the workload of the maker is reduced, the automation of the traditional rice cake beating machine is improved, the water outlet can be adjusted and controlled according to the adhesion degree, the hammer head is convenient for the main body to continuously beat, and the beating effect of the beaten rice cake is better.

Description

Automatic rice cake beating machine

Technical Field

The invention relates to the technical field of rice cake making equipment, in particular to an automatic rice cake beating machine.

Background

The existing rice cake beating machine adopts the lever principle, and drives a cam to rotate through a motor, so that the beating purpose is realized, and delicious rice cake food is manufactured.

However, when the rice cake beating machine is used, the hammer heads of the rice cake beating machine are often easy to be adhered with some glutinous rice, even the whole glutinous rice balls are taken out of stone mortar, in order to prevent the situation, the traditional manufacturing process is that a manufacturer dips both hands with water and then puts the water on the hammer before the hammer heads are lifted, the problem can be solved, the manufacturer is required to bend down continuously, serious waist and leg diseases can be brought about by long-time beating work, and further, some people improve the beating machine, beat by adopting the hammer heads which are relatively non-adhered with the glutinous rice and directly add water in the process, so that the glutinous rice is ensured to be adhered as little as possible, but the technician still needs to add water when the adhesion phenomenon occurs, and the water adding amount is difficult to accurately add according to the viscosity of the rice cake, especially for the rice cake manufactured by glutinous rice flour, the manufacturing process is relatively more complicated, and therefore, the rice cake automatic beating machine is provided.

Disclosure of Invention

The invention aims to provide an automatic rice cake beating machine, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the invention discloses an automatic rice cake beating machine, which comprises a rice cake beating machine main body and a plurality of threaded holes formed in the rice cake beating machine main body, wherein a water outlet adjusting component for automatically discharging water according to requirements when a rice cake is adhered to a hammer head and closing a water outlet when the rice cake is not adhered is arranged on the rice cake beating machine main body.

Preferably, the water outlet adjusting part comprises a hammer head main body which is arranged on the main body of the rice cake hammering machine through bolt threads, rotating lifting mechanisms which are used for rotating, regulating and controlling and mutually matching are arranged on two sides of the inner portion of the hammer head main body, arc-shaped scraping plates which are used for scraping rice cakes on the side wall of the stone mortar are connected with threads in the threaded holes, and through the water outlet adjusting part, a phenomenon that water is subjectively and manually added after the rice cake is adhered to the hammer head main body is avoided when a producer is hammering the rice cake.

Preferably, the rotation elevating system includes two main shafts of fixing respectively in the inside both sides of tup main part, all install the sector plate through the bearing rotation on the main shaft, all be fixed with the connecting rod on the sector plate, the connecting rod tip all is connected with the deflection pole through the bearing rotation, tup main part top inboard is fixed with the water tank, be provided with the play water control assembly who is used for realizing the water when adhesion on the water tank, two deflection rod tip is provided with the slider that is used for assisting the lift to shift, all be provided with the elastic component that is used for avoiding rocking on the sector plate, through rotation elevating system, then guarantee automatic as required water outlet when rice cake adhesion arc hammer plate to close the delivery port when not adhesion, replaced the operation of manual work with water, reduced the work load of preparation personnel, improved the automation of current rice cake beating machine.

Preferably, the water outlet control assembly comprises a water adding pipe fixed on the outer side of the water tank, the water adding pipe penetrates through the hammer head main body and extends to the outer side, a fixed pipe communicated with the inner portion is fixed at the bottom of the water tank, a movable pipe is connected inside the fixed pipe in a sliding mode, two water outlet holes matched with each other are formed in the outer side of the fixed pipe and the outer side of the movable pipe, rubber sealing gaskets used for being convenient to seal are fixed at the end portions of the fixed pipe, two straight slot openings used for carrying out trace water outlet when the adhesion degree is low are formed in the outer side of the fixed pipe, the straight slot openings are respectively communicated with adjacent water outlet holes, an arc plate is fixed at the bottom of the movable pipe, an adjusting piece used for conveniently adjusting water outlet is arranged on the arc plate, water outlet is regulated and controlled according to the adhesion degree through the water outlet control assembly, the hammer head main body is convenient to continuously beat, and the effect of beating rice cakes is better.

Preferably, the regulating part comprises four guide plates uniformly fixed on two sides of the top of the arc-shaped plate, the bottom of the arc-shaped plate is fixed with an arc-shaped hammer plate attached to the hammer head body when not in use, a water flowing groove penetrating through the arc-shaped plate and the arc-shaped hammer plate is formed between the end parts of the guide plates, and water flowing out conveniently is ensured to flow on the surface of the arc-shaped hammer plate according to the requirement through the regulating part.

Preferably, the screw thread connection at the top of the water tank is provided with a liquid level probe for observing the water quantity of the water tank before use, the liquid level probe movably penetrates through the hammer head main body, and the water quantity inside the water tank is intuitively known before use through the liquid level probe.

Preferably, the slider includes two lifter that rotate through the bearing respectively and connect at deflection rod end, the lifter bottom is all fixed at the arc top, tup main part both sides inner wall all is fixed with a plurality of locating plates that are used for auxiliary stay, both sides the locating plate opposite side all is fixed with the carriage, the spout has all been seted up around the tup main part, arc hammer plate top is fixed with and is used for avoiding the rice cake to get into inside accessory plate through arc hammer plate and tup main part interface department, accessory plate sliding connection is in the spout, through the slider, then guarantees to conveniently drive the movable tube and shift, and then guarantees effective play water.

Preferably, the elastic piece is including fixing the annular plate that is close to main shaft one side inner wall at the tup main part, the circular slot has been seted up on the sector plate, be fixed with the positioning spring that is located the circular slot inside on the sector plate, positioning spring end fixing has spacing ball, set up the arc wall that is used for making things convenient for spacing ball to use on the annular plate, through the elastic piece, then guarantee to conveniently carry out the joint location after the sector plate rotates the round, avoid appearing rocking.

Compared with the prior art, the invention has the beneficial effects that:

the invention is different from the prior art, so that the phenomenon of subjective manual water adding after the rice cake adheres to the hammer head main body is avoided when a producer is beating the rice cake, water is automatically discharged as required when the rice cake adheres to the arc hammer plate through the water outlet adjusting component, and the water outlet is closed when the rice cake does not adhere, thereby not only replacing the manual water adding operation, reducing the workload of the producer, improving the automation of the existing rice cake beating machine, but also regulating the water outlet according to the adhesion degree, facilitating the continuous beating work of the hammer head main body and ensuring better beating effect of the rice cake.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the invention after hammering;

FIG. 3 is a schematic view of a portion of the structure of FIG. 1 in accordance with the present invention;

FIG. 4 is a schematic view of the partial cross-section of FIG. 3 in accordance with the present invention;

FIG. 5 is a schematic view of the planar structure of FIG. 4 according to the present invention;

FIG. 6 is a schematic view of the present invention in partial cutaway of FIG. 4;

FIG. 7 is a schematic view of a part of the structure of the rotating and elevating mechanism of the present invention;

FIG. 8 is a schematic view of the present invention in partial cutaway of FIG. 3;

FIG. 9 is an enlarged schematic view of the area A of the present invention;

FIG. 10 is an enlarged view of the area B according to the present invention.

In the figure: 1-a rice cake beating machine main body; 2-a threaded hole; 3-a water outlet regulating part; 4-a hammer head main body; 5-rotating the lifting mechanism; 6-arc scraping plates; 7-a main shaft; 8-sector plates; 9-connecting rods; 10-deflecting the rod; 11-a water tank; 12-a water outlet control assembly; 13-a slider; 14-an elastic member; 15-a water adding pipe; 16-fixing the tube; 17-a movable tube; 18-water outlet holes; 19-a rubber gasket; 20-a straight slot; 21-an arc plate; 22-an adjusting member; 23-a deflector; 24-arc hammer plates; 25-a launder; 26-liquid level probe; 27-lifting rod; 28-positioning plates; 29-a carriage; 30-sliding grooves; 31-an auxiliary plate; 32-ring plates; 33-round grooves; 34-positioning a spring; 35-limiting balls; 36-arc grooves.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-10, the present invention provides a technical solution: an automatic rice cake beating machine comprises a rice cake beating machine main body 1 and a plurality of threaded holes 2 formed in the rice cake beating machine main body 1, wherein the rice cake beating machine main body 1 is conventional common rice cake beating equipment, and details are not repeated here;

the rice cake beating machine main body 1 is provided with a water outlet regulating component 3 which is used for automatically discharging water according to the need when the rice cake adheres to a hammer head and closing a water outlet when the rice cake does not adhere, when the rice cake beating machine is used, the rice cake beating machine is taken out through the rotation of a knob at the top of a liquid level probe 26, the water level inside a water tank 11 is observed, water is timely replenished, the start switch rice cake beating machine main body 1 is pressed down to start beating, in the beating process, an arc scraper 6 scrapes the rice cake on the side wall to the inside for beating, when the rice cake adheres to an arc hammer plate 24, an arc plate 21 and a movable pipe 17 are downwards driven to downwards shift, when the adhesion degree is lower, a water outlet hole 18 on the movable pipe 17 is firstly aligned with a straight notch 20 on a fixed pipe 16, a small amount of water outlet is started, the movable pipe 17 is reset under the action of a rotating lifting mechanism 5, when the adhesion degree is higher, the water outlet hole 18 on the movable pipe 17 and the fixed pipe 16 is aligned, so that the water outlet is increased, when the arc-shaped hammer plate 24 shifts downwards, the lifting rod 27 and the auxiliary plate 31 are driven to slide in the sliding frame 29 and the sliding groove 30 respectively, the lifting rod 27 drives the deflection rod 10 to rotate, the deflection rod 10 drives the connecting rod 9 and the sector plate 8 to rotate around the main shaft 7, at the moment, the sector plate 8 is positioned above the connecting rod 9, the mass of the sector plate 8 is relatively large, the mass of the arc-shaped plate 21, the mass of the arc-shaped hammer plate 24 and the mass of the auxiliary plate 31 are relatively small, the hardness of the arc-shaped hammer plate 24 is relatively high, when the rice cake is separated from the arc-shaped hammer plate 24, under the inertia and the gravity action of the sector plate 8, the arc-shaped plate 24 is driven to rotate downwards continuously, the arc-shaped hammer plate 24 is driven to shift upwards, the water outlet hole 18 is closed simultaneously, and under the action of the positioning spring 34, the limiting ball 35 is extruded to be clamped in the arc-shaped groove 36, so that the phenomenon that when a producer is beating the rice cake, the phenomenon of manually adding water after the rice cake is adhered to the hammer head main body 4 is avoided, through play water regulation part 3, automatic as required goes out when rice cake adhesion arc hammer plate 24 to close the delivery port when not adhesion, not only replaced the operation of manual work with water, reduced the staff's work load, improved the automation of current rice cake beating machine, can regulate and control the water yield according to the adhesion degree moreover, make things convenient for tup main part 4 to keep beating work, make the rice cake effect of beating out better.

The water outlet adjusting part 3 comprises a hammer head main body 4 which is arranged on the rice cake beating machine main body 1 through screw threads, two sides of the inside of the hammer head main body 4 are provided with rotating lifting mechanisms 5 which are used for rotating, adjusting and controlling and mutually matching, the screw holes 2 are internally connected with arc scraping plates 6 which are used for scraping the rice cake on the side wall of the stone mortar, when the rice cake beating machine is in use, the rice cake beating machine is taken out through the rotation of a knob at the top of a liquid level probe 26, the water level inside the water tank 11 is observed, water is timely replenished, the starting switch rice cake beating machine main body 1 is pressed down, the arc scraping plates 6 scrape the rice cake on the side wall to the inside for beating in the beating process, when the rice cake adheres to an arc hammering plate 24, the arc plate 21 and a movable pipe 17 are downwards moved, when the adhesion degree is lower, a water outlet hole 18 on the movable pipe 17 and a straight notch 20 on a fixed pipe 16 are firstly aligned, and a small amount of water outlet is started, when the adhesion degree is higher, the water outlet holes 18 on the movable pipe 17 and the fixed pipe 16 are aligned, so that the water yield is increased, when the arc-shaped hammer plate 24 shifts downwards, the lifting rod 27 and the auxiliary plate 31 are driven to slide in the sliding frame 29 and the sliding groove 30 respectively, the lifting rod 27 drives the deflection rod 10 to rotate, the deflection rod 10 drives the connecting rod 9 and the sector plate 8 to rotate around the main shaft 7, the sector plate 8 is positioned above the connecting rod 9, wherein the mass of the sector plate 8 is relatively larger, the mass of the arc-shaped plate 21, the arc-shaped hammer plate 24 and the auxiliary plate 31 is relatively smaller, the hardness of the arc-shaped hammer plate 24 is higher, when the rice cake is separated from the arc-shaped hammer plate 24, the arc-shaped hammer plate 24 is driven to rotate downwards continuously under the inertia and gravity action of the sector plate 8, the arc-shaped hammer plate 24 is driven to shift upwards, the water outlet holes 18 are closed simultaneously, and the limiting balls 35 are extruded to be clamped in the arc-shaped groove 36 under the action of the positioning spring 34, avoid sector plate 8 to make a round trip to rock, when making personnel beat the rice cake, subjective manual work after having avoided rice cake adhesion tup main part 4 adds the phenomenon of water, through play water regulation part 3, automatic as required goes out when rice cake adhesion arc hammer plate 24, and close the delivery port when not adhesion, not only replaced the operation of manual work with water, reduced the work load of making personnel, improved the automation of current rice cake machine of beating, can regulate and control the water yield according to the adhesion degree moreover, make things convenient for tup main part 4 to last to beat the work, make the rice cake effect of beating out better.

The rotary lifting mechanism 5 comprises two main shafts 7 which are respectively fixed on two sides of the inside of the hammer head main body 4, fan-shaped plates 8 are respectively installed on the main shafts 7 through bearing rotation, connecting rods 9 are respectively fixed on the fan-shaped plates 8, the end parts of the connecting rods 9 are respectively connected with deflection rods 10 through bearing rotation, a water tank 11 is fixed on the inner side of the top of the hammer head main body 4, a water outlet control assembly 12 for realizing water outlet during adhesion is arranged on the water tank 11, sliding pieces 13 for assisting lifting and displacement are arranged at the end parts of the deflection rods 10, elastic pieces 14 for avoiding shaking are respectively arranged on the fan-shaped plates 8, the lifting rods 27 drive the deflection rods 10 to rotate around the main shafts 7, water outlets are automatically and as required when the arc-shaped hammer plates 24 are adhered to each other through the bearing, manual water adding operation is replaced, the workload of a manufacturer is reduced, and the automation of the existing rice cake hammering machine is improved.

The water outlet control assembly 12 comprises a water adding pipe 15 fixed on the outer side of the water tank 11, the water adding pipe 15 penetrates through the hammer head main body 4 and extends to the outer side, a fixed pipe 16 communicated with the inner portion is fixed at the bottom of the water tank 11, a movable pipe 17 is slidably connected inside the fixed pipe 16, two water outlet holes 18 matched with each other are formed in the outer sides of the fixed pipe 16 and the movable pipe 17, rubber sealing gaskets 19 used for facilitating sealing use are fixed at the ends of the fixed pipe 16, two straight slot openings 20 used for conducting trace water outlet when the adhesion degree is low are formed in the outer side of the fixed pipe 16, the straight slot openings 20 are respectively communicated with adjacent water outlet holes 18, an arc plate 21 is fixed at the bottom of the movable pipe 17, an adjusting piece 22 used for facilitating water outlet adjustment is arranged on the arc plate 21, when the arc plate 24 is adhered to the bottom, the arc plate 21 and the movable pipe 17 are downwards shifted, when the adhesion degree is low, the water outlet holes 18 on the movable pipe 17 and the straight slot openings 20 on the fixed pipe 16 are aligned first, the water outlet holes 18 on the movable pipe 17 and the straight slot openings 20 are used for conducting water outlet when the hammer head is high, the water outlet mechanism is continuously adjusted and the water outlet is continuously and adjusted when the water outlet is more convenient to rotate at the upper end of the hammer head main body and the water outlet is adjusted and the water outlet is more convenient to rotate at the lower than the water outlet opening 18.

The regulating part 22 comprises four guide plates 23 uniformly fixed on two sides of the top of the arc plate 21, an arc hammer plate 24 attached to the hammer head main body 4 when not in use is fixed at the bottom of the arc plate 21, a water flowing groove 25 penetrating through the arc plate 21 and the arc hammer plate 24 is formed between the end parts of the guide plates 23, when in use, water flowing out from the water outlet 18 enters the water flowing groove 25 under the action of the guide plates 23, the water flowing groove 25 has a certain radian, the water flowing to the surface of the arc hammer plate 24 is further guaranteed, and the water flowing out conveniently flows on the surface of the arc hammer plate 24 according to requirements.

The top threaded connection of water tank 11 has the liquid level probe 26 that is used for observing the water yield of water tank 11 before the use, liquid level probe 26 activity runs through tup main part 4, and when using, through liquid level probe 26 top knob rotation with its taking out, observe the inside water level of water tank 11 and in time moisturizing, the inside water yield of water tank 11 is known directly perceivedly before the use.

The sliding part 13 comprises two lifting rods 27 which are respectively connected to the end parts of the deflection rod 10 through bearings in a rotating mode, the bottoms of the lifting rods 27 are respectively fixed to the top of the arc-shaped plate 21, a plurality of positioning plates 28 used for auxiliary support are respectively fixed to the inner walls of two sides of the hammer head main body 4, sliding frames 29 are respectively fixed to the opposite sides of the positioning plates 28, sliding grooves 30 are respectively formed in the periphery of the hammer head main body 4, auxiliary plates 31 used for preventing rice cakes from entering the inside through the interfaces of the arc-shaped hammer plates 24 and the hammer head main body 4 are fixed to the tops of the arc-shaped hammer plates 24, the auxiliary plates 31 are slidably connected in the sliding grooves 30, and when the arc-shaped hammer plates 24 are shifted downwards, the lifting rods 27 and the auxiliary plates 31 are driven to slide in the sliding frames 29 and the sliding grooves 30 respectively, the lifting rods 27 drive the deflection rod 10 to rotate, the movable pipes 17 are conveniently driven to shift, and effective water outlet is guaranteed.

The elastic piece 14 comprises a ring plate 32 fixed on the inner wall of one side of the hammer head main body 4, which is close to the main shaft 7, a circular groove 33 is formed in the sector plate 8, a positioning spring 34 positioned in the circular groove 33 is fixed on the sector plate 8, a limiting ball 35 is fixed at the end part of the positioning spring 34, an arc groove 36 used for facilitating the use of the limiting ball 35 is formed in the ring plate 32, and when the elastic piece is used, the limiting ball 35 is extruded to be clamped in the arc groove 36 under the action of the positioning spring 34, so that the sector plate 8 is prevented from shaking back and forth, clamping and positioning are conveniently performed after the sector plate 8 rotates for one circle, and the shaking back and forth is avoided.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automatic machine of beating of rice cake, includes rice cake beating machine main part (1) and a plurality of screw holes (2) of seting up on rice cake beating machine main part (1), its characterized in that: the rice cake beating machine is characterized in that a water outlet regulating component (3) for automatically discharging water according to need when rice cake adheres to a hammer head and closing a water outlet when not adhering is arranged on the rice cake beating machine body (1), the water outlet regulating component (3) comprises a hammer head body (4) which is arranged on the rice cake beating machine body (1) through bolt threads, rotating lifting mechanisms (5) which are used for rotating, regulating and controlling and mutually matching are arranged on two sides inside the hammer head body (4), an arc-shaped scraping plate (6) for scraping rice cake on the side wall of a stone mortar is connected with an inner thread of the threaded hole (2), the rotating lifting mechanisms (5) comprise two main shafts (7) which are respectively fixed on two sides inside the hammer head body (4), a connecting rod (9) is arranged on the main shafts (7) in a rotating mode through bearings, a rotating mode, a deflection rod (10) is connected to the end portion of the connecting rod (9) through bearings, a water outlet control component (12) for scraping water out when the stone mortar is arranged on the water tank (11), two deflection rods (10) are arranged on the fan head body (8) in a rotating mode, the fan body (8) is used for avoiding shaking of the fan body (13), the water outlet control assembly (12) comprises a water inlet pipe (15) fixed on the outer side of the water tank (11), the water inlet pipe (15) penetrates through the hammer head main body (4) and extends to the outer side, a fixed pipe (16) communicated with the inner portion is fixed at the bottom of the water tank (11), a movable pipe (17) is connected to the inner portion of the fixed pipe (16) in a sliding mode, two water outlet holes (18) matched with each other are formed in the outer side of the fixed pipe (16) and the movable pipe (17), rubber sealing gaskets (19) used for being conveniently used in a sealing mode are fixed at the end portions, two straight slot openings (20) used for conducting micro water outlet when the adhesion degree is low are formed in the outer side of the fixed pipe (16), the straight slot openings (20) are respectively communicated with the adjacent water outlet holes (18), an arc-shaped plate (21) is fixed at the bottom of the movable pipe (17), an adjusting piece (22) used for facilitating water outlet adjustment is arranged on the inner portion of the fixed pipe (16), the adjusting piece (22) comprises four evenly-shaped water outlet holes (18) formed in the outer side of the fixed pipe, two evenly-shaped hammer plates (21) are fixed on the top portions, two water outlet plates (23) are respectively arranged at the outer sides of the fixed pipe (16), when the two end portions (24) are in the arc-shaped body (24) and the arc-shaped body (24) are in a state, the utility model provides a rice cake, including slider (13), slider (13) are including two lifter (27) of connecting at the end of deflector (10) through the bearing rotation respectively, lifter (27) bottom all is fixed at arc (21) top, hammer head main part (4) both sides inner wall all is fixed with a plurality of locating plates (28) that are used for auxiliary stay, both sides locating plate (28) opposite side all is fixed with carriage (29), spout (30) have all been seted up around hammer head main part (4), arc (24) top is fixed with and is used for avoiding the rice cake to get into inside accessory plate (31) through arc (24) and hammer head main part (4) interface department, accessory plate (31) sliding connection is in spout (30).

2. The automatic rice cake beating machine according to claim 1, wherein: the top of the water tank (11) is in threaded connection with a liquid level probe (26) for observing the water quantity of the water tank (11) before use, and the liquid level probe (26) movably penetrates through the hammer head main body (4).

3. The automatic rice cake hammering machine according to claim 2, wherein: the elastic piece (14) comprises a ring plate (32) fixed on the inner wall of one side of the hammer main body (4) close to the main shaft (7), a circular groove (33) is formed in the sector plate (8), a positioning spring (34) positioned in the circular groove (33) is fixed on the sector plate (8), a limiting ball (35) is fixed at the end part of the positioning spring (34), and an arc groove (36) for facilitating the use of the limiting ball (35) is formed in the ring plate (32).