A shock absorber block for a hydraulic breaker

Abstract

The present invention provides a shock absorber block for a hydraulic breaker, belonging to the technical field of breakers. It solves the problem of the low service life of the existing shock absorber blocks. The shock absorber block of the present hydraulic breaker includes an elastic buffer block. The buffer blocks are all in a "cross" structure and there are four notches one on the buffer blocks. The shock absorber block further includes a spacer block, which is in a "cross" structure. There are four notches two on the spacer block. The spacer block and the buffer block are stacked, and there is a connection structure between the spacer block and the buffer block for circumferentially positioning the buffer block relative to the spacer block. The notches one and the notches two correspond one by one, and the side wall one of the notch one is arranged closer to the inside than the side wall two of the notch two. This structure improves the service life of the shock absorber block.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic breakers, and particularly relates to a shock absorber block of a hydraulic breaker. Background Art

[0002] Hydraulic breakers are generally installed on excavators for use. The power source of hydraulic breakers is mainly the power provided by excavators, loaders or pump stations. It can more effectively break stones and rocks in engineering construction and improve work efficiency. Traditional silent hydraulic breakers include a movement, a silent housing, a base and a shock absorber block. The movement includes a front cylinder block, a middle cylinder block, a rear cylinder block, a piston, a drill rod, etc. The front cylinder block, the middle cylinder block and the rear cylinder block are connected by four long screw rods, and the rear end of each long screw rod passes through the rear cylinder block and a nut is connected to the end. The movement is installed in the silent housing, the base is connected to the housing, the rear end of the rear cylinder block faces the base, and there is a certain assembly gap between the outer end of the nut and the side wall of the shock absorber block. During the working process of the hydraulic breaker, the movement will vibrate, causing the outer end of the nut to collide with the side wall of the shock absorber block, thereby damaging the shock absorber block.

[0003] At present, the Chinese Patent Network discloses a shock-absorbing hydraulic breaker [Authorized Publication Number: CN202023213U], which includes a main machine and a housing. The main machine includes a main machine body, a drill rod and a steering head. The main machine body is installed in the housing, the drill rod is installed at the front end of the main machine body, and the steering head is installed at the rear end of the housing. A polyurethane rear cushion block is arranged between the rear end of the main machine body and the steering head. During the working process of the breaker, the arrangement of the polyurethane rear cushion block eliminates the gap between the main machine body and the steering head, avoids the main machine body and the steering head from touching each other, and the polyurethane rear cushion block can deform to have a certain energy absorption effect, slow down the vibration of the main machine body and reduce noise.

[0004] In addition, the Chinese Patent Network also discloses a polyurethane composite shock absorber block for a hydraulic breaker [Authorization Announcement Number: CN201443040U]. The shock absorber block is in a cross shape and includes a balance vibration guiding and stabilizing wing and a shear force stabilizing wing. The middle of the shock absorber block is a comprehensive buffer part with an adjustment hole, and adjustment grooves are provided on both the balance vibration guiding and stabilizing wing and the shear force stabilizing wing. When the shock absorber block is installed, one end face of the shock absorber block is closely attached to the rear end face of the rear cylinder block. Four nuts on the rear cylinder block are respectively located in the four notches of the shock absorber block. The other end face of the shock absorber block is abutted against the side surface of the base. The base is connected to the outer shell to press the shock absorber block against the rear cylinder block. When the breaker works, vibrations will occur. The shock absorber block will rotate relative to the rear cylinder block under the influence of vibrations, and the side wall of the shock absorber block will collide with the nuts, and the shock absorber block is extremely prone to wear and even damage, and the shock absorber block needs to be replaced regularly. When replacing the shock absorber block, the base needs to be disassembled from the outer shell. Due to the huge volume of the breaker, the disassembly and assembly of the base are extremely inconvenient, greatly increasing the use cost of the breaker; in addition, during the working process of the breaker, the hydraulic oil and nitrogen in the breaker will generate heat, and the heat will be conducted to the rear cylinder block. Since the shock absorber block is in direct contact with the rear cylinder block, the temperature of the shock absorber block rises, and the shock absorber block is prone to deformation after being squeezed, and the shock absorber block is damaged. Summary of the Invention

[0005] The object of the present invention is to address the above problems existing in the prior art and propose a shock absorber block for a hydraulic breaker. The technical problem to be solved by the present invention is: how to improve the service life of the shock absorber block.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] A shock absorber block for a hydraulic breaker includes an elastic buffer block. The buffer block is in a "cross" structure and has four notches one on the buffer block. The shock absorber block is characterized in that it further includes a cushion block. The cushion block is in a "cross" structure and has four notches two on the cushion block. The cushion block and the buffer block are stacked, and there is a connection structure between the cushion block and the buffer block for circumferentially positioning the buffer block relative to the cushion block. The notches one and the notches two correspond one by one, and the side wall one of the notch one is arranged closer to the inside than the side wall two of the notch two.

[0008] The existing breaker includes a housing, a movement and a base. The movement is installed inside the housing, and the base is fixedly connected to the housing. The movement further includes a front cylinder block, a middle cylinder block and a rear cylinder block. The front cylinder block, the middle cylinder block and the rear cylinder block are connected in series by four long screw rods, and one end of each long screw rod passes through the outer end face of the rear cylinder block. A nut is connected to the outer end of each long screw rod. This shock absorber block is assembled and used on the breaker. The lower surface of the cushion block abuts against the outer end face of the rear cylinder block. The four notches one and the four notches two correspond to the four nuts one by one. The four nuts are respectively located in the corresponding notches one and notches two. The upper surface of the buffer block abuts against the base. After the base is fixedly connected to the housing, the buffer block and the cushion block are pressed against the rear cylinder block. The buffer block and the cushion block are connected and positioned by a connecting structure, and the buffer block cannot rotate circumferentially relative to the cushion block.

[0009] First, during the working process of the breaker, vibrations will be generated. Since the buffer block is elastic, the buffer block deforms after being squeezed, thus achieving the effect of shock absorption and noise reduction. Second, when the breaker is working, the vibrations of the breaker, the hydraulic oil and nitrogen in the breaker will all generate heat, and the heat will be conducted to the rear cylinder block. The cushion block is arranged between the buffer block and the rear cylinder block, and the cushion block plays a heat insulation effect, avoiding the direct conduction of heat to the buffer block, and then avoiding the too high temperature of the buffer block and prolonging the service life of the buffer block. In addition, after the breaker generates vibrations, it will drive the cushion block to rotate circumferentially relative to the end face of the rear cylinder block. The side wall two of the notch two will collide with the nut. The cushion block and the buffer block are connected together, and the buffer block will also rotate circumferentially with the cushion block. Since the side wall one of the notch one is arranged closer to the inside than the side wall two of the notch two, when the side wall two of the notch two collides with the nut, the side wall one of the notch one will not collide with the nut, playing a role in protecting the buffer block and avoiding damage to the buffer block, and further prolonging the service life of the buffer block.

[0010] In the shock absorber block of a hydraulic breaker described above, the connecting structure includes a positioning member. A positioning groove one is formed on the upper surface of the cushion block, and a positioning groove two is formed on the lower surface of the buffer block. The positioning member is located between the cushion block and the buffer block, and one end of the positioning member extends into the positioning groove one and the other end extends into the positioning groove two. Through the setting of this structure, the positioning member is respectively inserted and connected with the positioning groove one and the positioning groove two to connect the cushion block and the buffer block together, and the positioning member restricts the relative rotation of the cushion block and the buffer block.

[0011] In the shock absorber block of a hydraulic breaker described above, the buffer block is located within the projection of the upper surface of the cushion block. Through the design of this structure, the buffer block is completely located within the projection of the upper surface of the cushion block, that is, all the outer side walls of the buffer block are arranged closer to the inside than all the outer side walls of the cushion block, so that any position of the buffer block will not collide with the nut.

[0012] In the shock absorber block of a hydraulic breaker described above, the positioning member is a positioning pin, and there are two positioning pins. Two of the first positioning grooves are provided on the upper surface of the cushion block, and two of the second positioning grooves are provided on the lower surface of the buffer block. The first positioning grooves and the second positioning grooves correspond to each other one by one. Through the setting of this structure, the cushion block and the buffer block are connected and circumferentially limited by two positioning pins.

[0013] In the shock absorber block of a hydraulic breaker described above, all the first positioning grooves are arranged at intervals in the transverse direction on the upper surface of the cushion block, and all the second positioning grooves are arranged at intervals in the transverse direction on the lower surface of the buffer block.

[0014] In the shock absorber block of a hydraulic breaker described above, a first strip-shaped groove is longitudinally provided on the lower surface of the buffer block. The lower surface of the buffer block is in direct contact with the upper surface of the cushion block. The setting of the first strip-shaped groove enables the outside wind to blow through the first strip-shaped groove and take away part of the heat of the buffer block and the cushion block, playing a role in heat dissipation and reducing the heat conducted from the cushion block to the buffer block; in addition, the design of the first strip-shaped groove makes the buffer block more likely to deform, further improving the shock absorption effect of the buffer block.

[0015] In the shock absorber block of a hydraulic breaker described above, a second strip-shaped groove is transversely provided on the upper surface of the buffer block. The upper surface of the buffer block is in direct contact with the side wall of the base. The design of the second strip-shaped groove makes the buffer block more likely to deform, further improving the shock absorption effect of the buffer block.

[0016] In the shock absorber block of a hydraulic breaker described above, a positioning hole is provided in the middle of the buffer block. Through the setting of this structure, there is a positioning post on the base, and the positioning post is inserted into the positioning hole, and the air in the positioning hole can be discharged from the first strip-shaped groove and the second strip-shaped groove.

[0017] In the shock absorber block of a hydraulic breaker described above, the buffer block is made of polyurethane material, and the cushion block is made of MC901 material. MC901 material is cast nylon, which has properties such as light weight, high strength, self-lubrication, wear resistance, corrosion resistance and insulation. Therefore, the cushion block does not have the function of deforming to absorb shock, but the cushion block is not easily worn and damaged after colliding with the nut, extending the service life of the shock absorber block.

[0018] Compared with the prior art, the shock absorber block of the hydraulic breaker of the present invention has the following advantages: First, the buffer block is elastic. After being squeezed, the buffer block deforms, thus achieving the effect of shock absorption and noise reduction. Second, when the breaker is working, the vibration of the breaker, the hydraulic oil and nitrogen in the breaker will all generate heat, and the heat will be conducted to the rear cylinder block. The spacer is arranged between the buffer block and the rear cylinder block, and the spacer plays a heat insulation effect, avoiding the direct conduction of heat to the buffer block, and then avoiding the too high temperature of the buffer block and extending the service life of the buffer block. In addition, after the breaker generates vibration, it will drive the spacer to rotate circumferentially relative to the end face of the rear cylinder block, and the side wall two of the notch two will collide with the nut. The spacer and the buffer block are connected together, and the buffer block will also rotate circumferentially with the spacer. Since the side wall one of the notch one is arranged closer to the inside relative to the side wall two of the notch two, when the side wall two of the notch two collides with the nut, the side wall one of the notch one will not collide with the nut, which plays a role in protecting the buffer block and avoiding damage to the buffer block, and further extends the service life of the buffer block. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 is a top view of the shock absorber block and the rear cylinder block of the present invention.

[0021] Figure 3 is an exploded structural schematic diagram of the present invention.

[0022] Figure 4 is a three-dimensional structural schematic diagram of the buffer block of the present invention.

[0023] In the figure, 1, buffer block; 10, notch one; 101, side wall one; 11, positioning groove two; 12, strip groove one; 13, strip groove two; 14, left buffer part; 15, right buffer part; 16, front buffer part; 17, rear buffer part; 18, positioning hole; 2, spacer; 20, notch two; 201, side wall two; 21, positioning groove one; 3, positioning member; 4, rear cylinder block; 5, nut. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0025] Such as Figure 1 , Figure 3 and Figure 4As shown in the figure, the shock absorber block of this hydraulic breaker includes an elastic buffer block 1 and a spacer block 2. The buffer block 1 is made of polyurethane material, and the spacer block 2 is made of MC901 material. Both the buffer block 1 and the spacer block 2 are in a "cross-shaped" structure. The spacer block 2 is stacked with the buffer block 1, and there is a connection structure between the spacer block 2 and the buffer block 1 to circumferentially position the buffer block 1 relative to the spacer block 2. In this embodiment, the connection structure includes a positioning member 3, and the positioning member 3 is a positioning pin. There are two positioning pins. Two positioning grooves one 21 are provided on the upper surface of the spacer block 2, and two positioning grooves two 11 are provided on the lower surface of the buffer block 1. The positioning grooves one 21 and the positioning grooves two 11 correspond one by one. The positioning pins are located between the spacer block 2 and the buffer block 1, and one end of the positioning pin extends into the positioning groove one 21 and the other end extends into the positioning groove two 11. The lower surface of the buffer block 1 abuts against the upper surface of the spacer block 2. The buffer block 1 and the spacer block 2 are connected by positioning pins, and the buffer block 1 and the spacer block 2 cannot rotate relative to each other.

[0026] As Figure 1 and Figure 2 shown in the figure, there are four notches one 10 on the buffer block 1 and four notches two 20 on the spacer block 2. The notches one 10 and the notches two 20 correspond one by one. The side wall one 101 of the notch one 10 is arranged closer to the inside than the side wall two 201 of the notch two 20. The buffer block 1 is located within the projection of the upper surface of the spacer block 2, and a positioning hole 18 is provided in the middle of the buffer block 1. When the shock absorber block is assembled and used on the breaker, the lower surface of the spacer block 2 abuts against the outer end face of the rear cylinder block 4. The four notches one 10 and the four notches two 20 correspond to the four nuts 5 one by one. The four nuts 5 are respectively located in the corresponding notches one 10 and notches two 20. The upper surface of the buffer block 1 abuts against the base. After the base is fixedly connected to the housing 7, the buffer block 1 and the spacer block 2 are pressed against the rear cylinder block 4. The positioning post on the base is inserted into the positioning hole 18. First, during the working process of the breaker, vibrations will be generated. Since the buffer block 1 is elastic, the buffer block 1 will deform after being squeezed, thus achieving the effect of shock absorption and noise reduction. Secondly, both the vibrations of the breaker and the hydraulic oil and nitrogen in the breaker will generate heat, and the heat will be conducted to the rear cylinder block 4. The spacer block 2 is arranged between the buffer block 1 and the rear cylinder block 4, and the spacer block 2 plays an insulating role, avoiding the direct conduction of heat to the buffer block 1, and then avoiding the overheating of the buffer block 1 and prolonging the service life of the buffer block 1. In addition, after the breaker generates vibrations, it will drive the spacer block 2 and the buffer block 1 to rotate circumferentially relative to the end face of the rear cylinder block 4. The side wall two 201 of the notch two 20 will collide with the nut 5. Since the side wall one 101 of the notch one 10 is arranged closer to the inside than the side wall two 201 of the notch two 20, when the side wall two 201 of the notch two 20 collides with the nut 5, the side wall one 101 of the notch one 10 will not collide with the nut 5, playing a role in protecting the buffer block 1 and avoiding damage to the buffer block 1, and further prolonging the service life of the buffer block 1.

[0027] The upper and lower surfaces of the existing shock-absorbing blocks are both flat. When the shock-absorbing blocks are squeezed by the rear cylinder block and the base, the shock-absorbing blocks are compressed, causing the middle part of the shock-absorbing blocks to bulge outwards. When the thickness of the shock-absorbing blocks is relatively thin, the structural strength of the shock-absorbing blocks is relatively low, and the shock-absorbing blocks are easily crushed or damaged. As Figure 1 , Figure 3 and Figure 4 shown, in this embodiment, a first strip-shaped groove 12 is longitudinally formed on the lower surface of the buffer block 1, and a second strip-shaped groove 13 is transversely formed on the upper surface of the buffer block 1. The two second positioning grooves 11 are respectively located on the left and right sides of the first strip-shaped groove 12. The first strip-shaped groove 12 divides the lower surface of the buffer block 1 into a left buffer portion 14 and a right buffer portion 15, and the second strip-shaped groove 13 divides the upper surface of the buffer block 1 into a front buffer portion 16 and a rear buffer portion 17. When the buffer block 1 is squeezed by the rear cylinder block 4 and the base, both the left buffer portion 14 and the right buffer portion 15 expand in the left-right direction after being squeezed, and the arrangement of the first strip-shaped groove 12 provides a deformation space for the left buffer portion 14 and the right buffer portion 15 to expand in the left-right direction. Both the front buffer portion 16 and the rear buffer portion 17 expand in the front-rear direction after being squeezed, and the arrangement of the second strip-shaped groove 13 provides a deformation space for the front buffer portion 16 and the rear buffer portion 17 to expand in the front-rear direction. The arrangements of the first strip-shaped groove 12 and the second strip-shaped groove 13 make the buffer block 1 more likely to deform, improve the deformation performance of the buffer block 1, and further improve the shock-absorbing effect of the buffer block 1. At the same time, the deformation of the buffer block 1 after being squeezed occurs at the upper and lower parts of the buffer block, and the middle part of the buffer block 1 does not bulge outwards, so that the buffer block 1 is still not easily crushed or damaged when the thickness is reduced. In addition, the first strip-shaped groove 12 and the second strip-shaped groove 13 are arranged perpendicular to each other, and the buffer block 1 will not break at the first strip-shaped groove 12 and the second strip-shaped groove 13 after being squeezed.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A shock absorber block for a hydraulic breaker, comprising an elastic buffer block (1), the buffer blocks (1) are all in a "cross" structure and the buffer block (1) has four notches one (10), characterized in that, The shock absorber block further includes a spacer block (2), the spacer block (2) has a "cross-shaped" structure, the spacer block (2) has four notches two (20), the spacer block (2) and the buffer block (1) are stacked, and there is a connection structure between the spacer block (2) and the buffer block (1) for circumferentially positioning the buffer block (1) relative to the spacer block (2), the notch one (10) corresponds to the notch two (20) one by one, and the side wall one (101) of the notch one (10) is arranged closer to the inside than the side wall two (201) of the notch two (20). The connection structure includes a positioning member (3), a first positioning groove (21) is formed on the upper surface of the spacer block (2), a second positioning groove (11) is formed on the lower surface of the buffer block (1), the positioning member (3) is located between the spacer block (2) and the buffer block (1), and one end of the positioning member (3) extends into the first positioning groove (21) and the other end extends into the second positioning groove (11).

2. The shock absorber block of a hydraulic breaker according to claim 1, characterized in that, The buffer block (1) is located within the projection of the upper surface of the spacer block (2).

3. The shock absorber block of a hydraulic breaker according to claim 1, characterized in that, The positioning member (3) is a positioning pin, there are two positioning pins, two of the first positioning grooves (21) are formed on the upper surface of the spacer block (2), two of the second positioning grooves (11) are formed on the lower surface of the buffer block (1), and the first positioning groove (21) corresponds to the second positioning groove (11) one by one.

4. The shock absorber block of a hydraulic breaker according to claim 3, characterized in that, All the first positioning grooves (21) are arranged at intervals in the transverse direction on the upper surface of the spacer block (2), and all the second positioning grooves (11) are arranged at intervals in the transverse direction on the lower surface of the buffer block (1).

5. The shock absorber block of a hydraulic breaker according to claim 1, characterized in that A first strip-shaped groove (12) is formed longitudinally on the lower surface of the buffer block (1).

6. The shock absorber block of a hydraulic breaker according to claim 5, characterized in that, A second strip-shaped groove (13) is formed transversely on the upper surface of the buffer block (1).

7. A shock absorber block for a hydraulic breaker according to any one of claims 1 to 6, characterized in that, A positioning hole (18) is formed in the middle of the buffer block (1).

8. A shock absorber block of a hydraulic breaker according to any one of claims 1 to 6, characterized in that, The buffer block (1) is made of polyurethane material, and the spacer block (2) is made of MC901 material.

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