High-frequency breaking hammer capable of reducing excitation damage

Abstract

The utility model relates to the field of high-frequency breaking hammers, in particular to a high-frequency breaking hammer capable of reducing shock excitation damage, which comprises a shock absorption box, a shock excitation box and a shock excitation protection mechanism, wherein the shock excitation protection mechanism is arranged between the shock excitation box and the shock absorption box, and the shock excitation protection mechanism is located on a vibration path of the shock excitation box so as to limit the forward vibration amplitude of the shock excitation box when the high-frequency breaking hammer works. The shock excitation protection mechanism is arranged between the shock excitation box and the shock absorption box and located on the vibration path of the shock excitation box, so that the front vibration amplitude of the shock excitation box is limited when the high-frequency breaking hammer works, the shock excitation box is prevented from directly colliding with the shock absorption mechanism, noise can be reduced, and the service life of the high-frequency breaking hammer is prolonged. And damage to other mechanisms due to overlarge amplitude can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of high-frequency breaking hammers, in particular to a high-frequency breaking hammer capable of reducing vibration damage. Background Art

[0002] High-frequency breaker is a new type of excavator accessory product driven by a motor, which uses centrifugal force to reciprocate up and down to generate destructive force. It changes the principle of using piston impact crushing. The hydraulic energy of the excavator is transmitted to the hydraulic motor, which drives the eccentric gear in the vibration box to rotate, thereby generating centrifugal force. Its vertical component is a periodically changing interference force, which causes the shaft to produce radial forced vibration pressure, called exciting force, and then the vibration is transmitted to the bucket teeth by the exciter box for crushing. High-frequency breaker is a physical crushing equipment that integrates mechanical hydraulic mechanics, digital signals, and digital monitoring. At present, high-frequency breaker usually sets a buffer airbag between the rear of the exciting box and the rear of the shock absorber box shell. When the high-frequency breaker is operating normally, the airbag realizes the shock absorption of the rear of the exciting box, and because there is a striking object in front of the bucket teeth, the striking object will limit the front vibration amplitude of the exciting box. Therefore, during normal striking, the exciting box will hardly hit the front of the shock absorber box. However, when the high-frequency breaker is performing dry striking, there is nothing in front of the bucket tooth, and the amplitude of the vibration box will be large due to the lack of restriction when it vibrates forward, causing the vibration box to collide with the shell, thereby generating a loud noise, which may seriously tear the airbag and cause damage to other parts of the equipment.

[0003] At present, high-frequency breakers are generally used for land construction. During land construction, the bucket teeth are facing downward and breaking vertically. After the rock is broken, the bucket teeth can immediately stick to the rock below by relying on the breaker's own gravity. Therefore, there is rarely a situation of empty hitting (or the empty hitting time is very short, and the impact of empty hitting can be ignored). Therefore, the current high-frequency breaker almost does not need to consider the problem of empty hitting when designing. However, when we need to use high-frequency breakers for tunnel excavation construction, the high-frequency breaker needs to hit the face horizontally or obliquely upward to break it. When the rock is broken and falls, if the hitting can be stopped in time or the high-frequency breaker can be controlled to move forward and stick to the rock in front, the damage caused by empty hitting can be reduced. However, the actual situation is that the smoke and dust of the high-frequency breaker is very large when hitting, and it is difficult for the operator to find the hitting situation in front. It is often discovered after a period of empty hitting, resulting in the damage of the shock absorber box. Utility Model Content

[0004] In view of this, the utility model provides a high-frequency breaker hammer capable of reducing damage caused by excitation, aiming at reducing the damage caused by excitation when the high-frequency breaker hammer is working.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A high-frequency breaker capable of reducing vibration damage comprises a shock absorbing box, a vibration excitation box and a vibration protection mechanism; wherein the vibration protection mechanism is arranged between the vibration excitation box and the shock absorbing box, and the vibration protection mechanism is located on the vibration path of the vibration excitation box to limit the front vibration amplitude of the vibration excitation box when the high-frequency breaker is working.

[0007] In some embodiments, the vibration protection mechanism includes a first vibration protection mechanism; the first vibration protection mechanism is arranged between the top of the vibration box and the top inner wall of the shock absorbing box, or between the bottom of the vibration box and the bottom inner wall of the shock absorbing box.

[0008] In some embodiments, the first excitation protection mechanism includes a baffle, an elastic member and an impact plate; the baffle is mounted on the excitation box; the impact plate is mounted on the shock absorbing box through the elastic member, and the impact plate is located in front of the vibration path of the baffle.

[0009] In some embodiments, the first excitation protection mechanism further includes a limiting mechanism; the limiting mechanism is connected to the shock absorbing box and is used to limit the forward movement of the impact plate and the baffle plate beyond a preset distance.

[0010] In some embodiments, the limiting mechanism includes a limiting plate; the limiting plate is mounted on the excitation box and is spaced in front of the impact plate.

[0011] In some embodiments, the limiting mechanism includes a base; the elastic member is installed on the shock absorbing box through the base; the rear end of the impact plate has a vertical plate extending toward the inner wall of the shock absorbing box; and the base is located in front of the movement path of the vertical plate.

[0012] In some embodiments, the vibration protection mechanism also includes a second vibration protection mechanism; one of the first vibration protection mechanism and the second vibration protection mechanism is arranged between the top of the vibration box and the top inner wall of the shock-absorbing box, and the other is arranged between the bottom of the vibration box and the bottom inner wall of the shock-absorbing box.

[0013] In some embodiments, the second vibration protection mechanism includes a fixing seat and a buffer; the fixing seat is connected to the shock absorbing box, and the buffer is installed on the fixing seat; the front part of the vibration absorbing box has a protruding plate extending toward the inner wall of the shock absorbing box; the fixing seat, the buffer and the protruding plate are arranged in sequence from front to back.

[0014] In some embodiments, the second excitation protection mechanism includes a fixing seat and a buffer; the fixing seat is connected to the shock absorbing box, and the buffer is installed on the fixing seat; the front part of the excitation box has a collision part; the fixing seat and the buffer are located in front of the collision part.

[0015] In some embodiments, the cushioning member includes a bladder air spring.

[0016] In summary, compared with the prior art, the utility model has the following advantages and beneficial effects: the utility model is provided with a vibration protection mechanism between the vibration box and the shock absorbing box, and the vibration protection mechanism is located on the vibration path of the vibration box to limit the front vibration amplitude of the vibration box when the high-frequency breaker is working, to prevent the vibration box from directly colliding with the shock absorbing mechanism, to reduce noise, and to avoid damage to other mechanisms due to excessive amplitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the high-frequency breaker described in Example 1 of the utility model.

[0018] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of area A in the middle.

[0019] Figure 3 This is a schematic diagram of the structure of the high-frequency breaker described in Example 2 of the utility model.

[0020] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of area B in the middle.

[0021] Figure 5 This is a schematic diagram of the structure of the high-frequency breaker described in Example 3 of the utility model.

[0022] Figure 6 for Figure 1 Schematic diagram of the enlarged structure of area C in the middle.

[0023] Figure 7 This is a schematic diagram of the structure of the high-frequency breaker described in Example 4 of the utility model.

[0024] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of area D in the middle.

[0025] The meanings of the numbers in the figure are: ear seat 1, shock absorbing box 2, shock absorbing mechanism 3, first connecting rod mechanism 4, vibration box 5, second connecting rod mechanism 6, tool 7, first vibration protection mechanism 8, elastic member 81, impact plate 82, baffle 83, limit plate 84, base 85, vertical plate 86, second vibration protection mechanism 9, fixed seat 91, buffer member 92, protruding plate 93, collision part 94. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there are descriptions of the first, second and other similar terms, they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Embodiment 1

[0031] like Figure 1 As shown, a high-frequency breaker capable of reducing vibration damage described in an embodiment of the present application includes a shock absorbing box 2, a vibration box 5 and a vibration protection mechanism.

[0032] The vibration box 5 is arranged in the shock absorbing box 2, and the vibration box 5 can generate the vibration force in the front and rear directions. Figure 1 For ease of description, the front side in this application refers to Figure 1 The left side, the rear side in this application refers to Figure 1 The upper part in this application refers to Figure 1 The lower side in this application refers to Figure 1 The lower side.

[0033] The vibration box 5 can be hinged to the shock absorbing box 2 through a connecting rod mechanism. The connecting rod mechanism may include a first connecting rod mechanism 4 hinged to the rear end of the vibration box 5 and the rear part of the shock absorbing box 2, and a second connecting rod mechanism 6 hinged to the front end of the vibration box 5 and the front part of the shock absorbing box 2. The connecting rod mechanism can enable the vibration box 5 to move relative to the shock absorbing box 2, so that the vibration box 5 will not drive the shock absorbing box 2 to also perform the vibration movement when performing the vibration movement.

[0034] The rear end of the shock-absorbing box 2 can be connected to an ear seat 1 by, for example, welding, and the ear seat 1 is used to connect the arm or the vehicle body.

[0035] The front end of the vibration box 5 is connected with a cutter 7 which can be extended to the outside of the shock absorbing box 2. The cutter 7 is mainly used for crushing operations. The cutter 7 can be a crushing component such as a bucket tooth, a drill rod or a cutter row.

[0036] The rear part of the excitation box 5 and the rear part of the shock absorber box 2 can be connected through a shock absorbing mechanism 3. The shock absorbing mechanism 3 can include a bag-type air spring. One side of the bag-type air spring is connected to the inner wall of the rear end of the shock absorber box 2, and the other side of the bag-type air spring is connected to the rear end of the excitation box 5. The bag-type air spring is composed of a rubber airbag with cords and compressed air (mainly nitrogen) enclosed therein. The inner layer of the airbag is made of airtight rubber, and the outer layer is made of oil-resistant rubber. The airbag is generally made of two sections, but there are also single sections or three or four sections. The more sections there are, the better the elasticity, but the poorer the sealing. There are steel waist rings between the sections to prevent the middle part from radial expansion and prevent friction between the two sections. The upper and lower cover plates of the airbag seal the airbag. The embodiment of the present application uses the shock absorbing mechanism 3 to achieve buffering between the excitation box 5 and the rear end of the shock absorber box 2, thereby avoiding the transmission of the excitation force to the arm or the body as much as possible.

[0037] When the high-frequency breaker works normally, the cutter 7 is always in contact with the rock, so the shock absorbing mechanism 3 is usually in an extrusion state, and the exciting movement of the excitation box 5 is limited to a small range. However, when the extrusion force is not enough, or the high-frequency breaker hits empty, the cutter 7 will reciprocate in the shock absorbing box 2 driven by the exciting movement of the excitation box 5. If the excitation amplitude of the excitation box 5 is too large, it may cause the excitation box 5 to collide with the shock absorbing box 2 and generate a large noise, or even be damaged by the collision, and even more seriously, the airbag in the shock absorbing mechanism 3 will be directly torn. Since the rear part of the excitation box 5 is connected to the rear part of the shock absorbing box 2 through the shock absorbing mechanism 3, the collision generally occurs between the front part of the excitation box 5 and the front part of the shock absorbing box 2.

[0038] In order to minimize the damage caused by excessive vibration such as air striking, Figure 1As shown, in the embodiment of the present application, a vibration protection mechanism is arranged between the vibration box 5 and the shock absorbing box 2. The vibration protection mechanism is located on the vibration path of the vibration box 5 to limit the front vibration amplitude of the vibration box 5 when the high-frequency breaker is working, so as to prevent the vibration box 5 from directly colliding with the shock absorbing mechanism 3.

[0039] The vibration protection mechanism can be as follows Figure 1 and Figure 2 The first vibration protection mechanism 8 shown can be arranged between the top of the vibration box 5 and the top inner wall of the shock absorbing box 2, but it can obviously also be arranged between the bottom of the vibration box 5 and the bottom inner wall of the shock absorbing box 2.

[0040] Here Figure 1 and Figure 2 The first vibration protection mechanism 8 shown is arranged between the top of the vibration box 5 and the top inner wall of the shock absorption box 2 to illustrate the specific structure of the first vibration protection mechanism 8. The first vibration protection mechanism 8 includes a baffle 83, an elastic member 81 and an impact plate 82.

[0041] The baffle 83 is installed on the top of the excitation box 5 and extends upward for a distance.

[0042] The impact plate 82 is installed on the shock absorber box 2 through the elastic member 81, that is, the upper end of the elastic member 81 is connected to the upper inner wall of the shock absorber box 2, and the impact plate 82 is connected to the lower end of the elastic member 81, and the impact plate 82 is located in front of the vibration path of the baffle 83.

[0043] In this way, when the high-frequency breaker performs excessive excitation behaviors such as empty striking, if the excitation box 5 vibrates backward, it will be restricted by the shock absorbing mechanism 3. When the excitation box 5 vibrates forward, it will drive the baffle 83 to move forward. When the baffle 83 moves forward to a certain amplitude, it will collide with the impact plate 82, and then squeeze the elastic member 81 to deform. At the same time, the deformed elastic member 81 will provide a backward elastic force to the baffle 83, prompting the excitation box 5 to move backward, thereby achieving the purpose of limiting the amplitude of the excitation box 5 and preventing the excitation box 5 from moving forward too far and colliding with the shock absorbing box 2. Since no collision occurs, the generation of noise can also be reduced.

[0044] In order to prevent the elastic member 81 from deforming too much, so that the vibration box 5 and its baffle 83 move forward excessively, the first vibration protection mechanism 8 described in the embodiment of the present application may also include a limiting mechanism, which is used to limit the forward movement of the impact plate 82 and the baffle 83 beyond a preset distance. The limiting mechanism can be as follows: Figure 1 and Figure 2The limit plate 84 shown in the figure is arranged on the upper inner wall of the excitation box 5, and the limit plate 84 extends downward for a distance and is arranged in front of the impact plate 82 at intervals, so as to interfere with the front end of the impact plate 82 to prevent the impact plate 82 from moving forward too far, thereby preventing the elastic member 81 from deforming too much, and further limiting the maximum distance of the baffle 83 (that is, the excitation box 5) moving forward.

[0045] Embodiment 2

[0046] In order to prevent the elastic member 81 from deforming too much, the second embodiment also provides another structural form of the first vibration protection mechanism 8. Figure 3 and Figure 4 As shown, the same as the first embodiment is that the first vibration protection mechanism 8 described in the second embodiment still includes an elastic member 81, a collision plate 82 and a baffle 83 and the arrangement is the same, but the difference is that in the first vibration protection mechanism 8 described in the second embodiment, its limiting mechanism includes a base 85, and the collision plate 82, the elastic member 81 and the base 85 are connected in sequence, and the base 85 is also connected to the shock absorbing box 2. In addition, the rear end of the collision plate 82 also has a vertical plate 86 extending toward the inner wall of the shock absorbing box 2, so that the base 85 is located in front of the movement path of the vertical plate 86.

[0047] In this way, when the vibration box 5 moves forward, the baffle 83 first contacts the rear end of the impact plate 82 and squeezes the elastic member 81 to deform. When the amplitude of the vibration box 5 moving forward exceeds a preset value, the vertical plate 86 extending from the impact plate 82 will conflict with the rear end of the base 85, thereby limiting the vertical plate 86 from moving forward further, preventing the elastic member 81 from further deforming, and finally preventing the baffle 83 and the vibration box 5 from moving forward.

[0048] In the first and second embodiments, the elastic member 81 may be an elastic rubber, for example, the elastic rubber may be made into a cylindrical shape or a hyperbolic shape with a vertical cross section, and a plurality of elastic members may be arranged in sequence along the vibration direction. Rubber elasticity refers to the property of a class of polymer materials represented by natural rubber that exhibits a large reversible deformation under the action of external forces, and it is affordable and has stable performance.

[0049] Embodiment 3

[0050] On the basis of the first and second embodiments, in order to further limit the forward movement of the excitation box 5 when the high-frequency breaker performs excessive excitation behaviors such as empty striking, as shown in FIG. Figure 5 and Figure 6As shown, in the embodiment of the present application, a second excitation protection mechanism 9 can also be provided between the excitation box 5 and the shock absorbing box 2 as an excitation protection mechanism. The second excitation protection mechanism 9 is located on the vibration path of the excitation box 5 to limit the forward movement range of the excitation box 5 when the high-frequency breaker is working, that is, to limit the forward vibration amplitude of the excitation box 5.

[0051] The first vibration protection mechanism 8 and the second vibration protection mechanism 9 can be relatively arranged on the upper and lower sides of the vibration box 5, that is, one of the first vibration protection mechanism 8 and the second vibration protection mechanism 9 is arranged between the top of the vibration box 5 and the top inner wall of the shock absorption box 2, and the other is arranged between the bottom of the vibration box 5 and the bottom inner wall of the shock absorption box 2.

[0052] Here Figure 5 and Figure 6 The second vibration protection mechanism 9 shown is arranged between the bottom of the vibration box 5 and the bottom inner wall of the shock-absorbing box 2 as an example to illustrate the specific structure of the second vibration protection mechanism 9. The second vibration protection mechanism 9 includes a fixing seat 91 and a buffer 92. The fixing seat 91 is connected to the inner wall of the bottom of the shock-absorbing box 2 and is located at the front position thereof, and the buffer 92 is installed on the rear side of the fixing seat 91. The front part of the vibration box 5 has a protruding plate 93 extending toward the inner wall of the shock-absorbing box 2, and the fixing seat 91, the buffer 92 and the protruding plate 93 are arranged in sequence from front to back.

[0053] When the vibration box 5 moves forward, the protruding plate 93 connected to the bottom of the vibration box 5 will contact and squeeze the buffer 92, and then the buffer 92 will provide a backward elastic force to the protruding plate 93 at the bottom of the vibration box 5 to urge it to move backward. The first vibration protection mechanism 8 and the second vibration protection mechanism 9 limit the forward movement of the vibration box 5, which fully ensures that the vibration box 5 will not move forward excessively and hit the shock absorber box 2 when the high-frequency breaker performs excessive vibration behaviors such as empty hitting.

[0054] Embodiment 4

[0055] like Figure 7 and Figure 8 As shown, the difference between the embodiment of the present application and the third embodiment is that the lower part of the excitation box 5 no longer has an extended protruding plate 93, but a part of the front part of the lower part of the excitation box 5 becomes a collision part 94 so as to contact and squeeze the buffer 92, and the fixing seat 91 and the buffer 92 are located in front of the collision part 94. The collision part 94 has the same function as the protruding plate 93 in the third embodiment, so its technical effect will not be repeated.

[0056] In the third and fourth embodiments, the buffer member 92 can use a bag-type air spring like the shock absorbing mechanism 3 .

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above preferred embodiments shall not be regarded as limiting the present invention, and the protection scope of the present invention shall be subject to the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications shall also be regarded as the protection scope of the present invention.

Claims

1. A high-frequency breaker capable of reducing vibration damage, characterized in that: It comprises a shock absorbing box (2), a vibration exciting box (5) and a vibration exciting protection mechanism; The vibration protection mechanism is arranged between the vibration box (5) and the shock absorbing box (2), and the vibration protection mechanism is located on the vibration path of the vibration box (5) to limit the front vibration amplitude of the vibration box (5) when the high-frequency breaker is working.

2. A high-frequency breaker capable of reducing vibration damage as claimed in claim 1, characterized in that: The vibration protection mechanism comprises a first vibration protection mechanism (8); the first vibration protection mechanism (8) is arranged between the top of the vibration box (5) and the top inner wall of the shock absorbing box (2), or between the bottom of the vibration box (5) and the bottom inner wall of the shock absorbing box (2).

3. A high-frequency breaker capable of reducing vibration damage as claimed in claim 2, characterized in that: The first vibration protection mechanism (8) comprises a baffle (83), an elastic member (81) and an impact plate (82); The baffle (83) is installed on the vibration box (5); The impact plate (82) is mounted on the shock absorbing box (2) via the elastic member (81), and the impact plate (82) is located in front of the vibration path of the baffle plate (83).

4. A high-frequency breaker capable of reducing vibration damage as claimed in claim 3, characterized in that: The first vibration protection mechanism (8) also includes a limiting mechanism; the limiting mechanism is connected to the shock absorbing box (2) and is used to limit the forward movement of the impact plate (82) and the baffle plate (83) beyond a preset distance.

5. A high-frequency breaker capable of reducing vibration damage as claimed in claim 4, characterized in that: The limiting mechanism comprises a limiting plate (84); the limiting plate (84) is mounted on the vibration box (5) and is arranged in front of the impact plate (82) at intervals.

6. A high-frequency breaker capable of reducing vibration damage as claimed in claim 4, characterized in that: The limiting mechanism comprises a base (85); the elastic member (81) is mounted on the shock absorbing box (2) via the base (85); the rear end of the impact plate (82) has a vertical plate (86) extending toward the inner wall of the shock absorbing box (2); and the base (85) is located in front of the movement path of the vertical plate (86).

7. A high-frequency breaker capable of reducing vibration damage as claimed in claim 2, characterized in that: The vibration protection mechanism also includes a second vibration protection mechanism (9); one of the first vibration protection mechanism (8) and the second vibration protection mechanism (9) is arranged between the top of the vibration box (5) and the top inner wall of the shock-absorbing box (2), and the other is arranged between the bottom of the vibration box (5) and the bottom inner wall of the shock-absorbing box (2).

8. A high-frequency breaker capable of reducing vibration damage as claimed in claim 7, characterized in that: The second vibration protection mechanism (9) comprises a fixing seat (91) and a buffer member (92); the fixing seat (91) is connected to the shock absorbing box (2), and the buffer member (92) is installed on the fixing seat (91); the front part of the vibration absorbing box (5) has a protruding plate (93) extending toward the inner wall of the shock absorbing box (2); the fixing seat (91), the buffer member (92) and the protruding plate (93) are arranged in sequence from front to back.

9. A high-frequency breaker capable of reducing vibration damage as claimed in claim 7, characterized in that: The second vibration protection mechanism (9) comprises a fixing seat (91) and a buffer member (92); the fixing seat (91) is connected to the shock absorbing box (2), and the buffer member (92) is installed on the fixing seat (91); the front part of the vibration box (5) has a collision part (94); the fixing seat (91) and the buffer member (92) are located in front of the collision part (94).

10. A high-frequency breaker capable of reducing vibration damage according to claim 8 or 9, characterized in that: The buffer member (92) comprises a bag-type air spring.

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