A break hammer side cover connecting device facilitating maintenance

Abstract

The utility model relates to the technical field of breaking hammer, concretely is a kind of breaking hammer side cover connecting device convenient for overhaul, including cover, the side detachable connection of cover is used for the damping rod of buffering, the end face of the mutual contact of damping rod and cover is provided with the shock-absorbing pad for shock absorption, the outer surface of damping rod is sleeved with the spring for reset, the end of the damping rod away from cover is provided with the connecting disc for positioning, the side of connecting disc with the one end of spring is detachably connected.The breaking hammer side cover connecting device convenient for overhaul is cooperatively arranged by damping rod, shock-absorbing pad, spring and connecting disc, when breaking hammer vibrates or impacts when using, damping rod consumes vibration energy by the elastic deformation of itself, reduces the vibration amplitude of cover, reduces the fatigue damage of connecting bolt due to vibration, simultaneously avoids the hard collision of cover and peripheral component.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic breaker technology, specifically to a hydraulic breaker side cover connection device that is easy to maintain. Background Technology

[0002] A hydraulic breaker is a hydraulic operating device installed on construction machinery such as excavators and loaders. Its core relies on high-pressure hydraulic oil supplied by the main unit to drive an internal impact piston to reciprocate at high speed and strike a chisel, transferring kinetic energy to hard materials such as rocks and concrete to achieve crushing. Structurally, it mainly consists of a hydraulic motor or cylinder, an impact piston, a chisel, and a housing. According to the connection method, it can be divided into two types: straight and triangular. The former has concentrated impact energy and is suitable for high-intensity operations such as mining, while the latter is flexible and compact and suitable for narrow spaces such as municipal maintenance. In practical applications, it is widely used in building demolition, mining, road construction, and municipal engineering, undertaking the key tasks of crushing, demolition, or auxiliary excavation.

[0003] However, the present invention has the following problems in actual use;

[0004] The existing side cover needs to withstand high-frequency vibration and intermittent impact loads for a long time during use. The connection between the side cover and the breaker cylinder and bracket mostly adopts the traditional single-stage fixing structure, which is not strong enough to resist vibration during use. This makes it easy for the preload of the connection to decrease, and the bolts and nuts will gradually loosen with vibration. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a breaker side cover connection device that is easy to maintain. It solves the problems mentioned in the background art, such as the existing side cover needing to withstand high-frequency vibration and intermittent impact loads for a long time during use, and the connection between the side cover and the breaker cylinder and bracket mostly adopting the traditional single-stage fixing structure, which has insufficient vibration resistance during use, and is more likely to cause the pre-tightening force of the connection to decrease, and the bolts and nuts to gradually loosen with vibration.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a breaker hammer side cover connection device that is easy to maintain, including a cover plate, a damping rod for buffering is detachably connected to one side of the cover plate, a shock-absorbing pad for vibration reduction is provided on the end face of the damping rod that contacts the cover plate, a spring for reset is sleeved on the outer surface of the damping rod, and a connecting plate for positioning is provided at the end of the damping rod away from the cover plate, one side of the connecting plate is detachably connected to one end of the spring.

[0009] Preferably, one side of the cover plate has multiple locking holes for limiting movement, and the outer surface of the cover plate has friction textures for anti-slip purposes.

[0010] Preferably, the inner walls of the plurality of the card holes are each fitted with a bidirectional screw for connection, and one end of the bidirectional screw is fixedly connected to one end of the damping rod.

[0011] Preferably, the outer surface of the bidirectional screw is threaded with a first nut for fastening, and the outer surface of the first nut is provided with friction grooves for anti-slip.

[0012] Preferably, a second nut for fastening is threaded onto the outer surface of the bidirectional screw near the first nut, and the lower end of the second nut abuts against the lower end of the first nut.

[0013] Preferably, the upper end of the cover plate is fixedly connected to two positioning plates for limiting the position, and the two positioning plates are symmetrically arranged with the vertical center line of the cover plate as the axis of symmetry.

[0014] Preferably, each of the two positioning plates has a connecting hole for positioning on one side, and a fastening rod for fixing is threaded onto the inner wall of the connecting hole.

[0015] Preferably, one end of the fastening rod is threaded with a third nut for fixing, and the outer surface of the third nut is provided with friction texture for anti-slip.

[0016] (III) Beneficial Effects

[0017] This utility model provides a side cover connection device for a hydraulic breaker that is easy to maintain, and has the following advantages:

[0018] This easy-to-maintain side cover connection device for hydraulic breakers, through the coordinated arrangement of a damping rod, a shock-absorbing pad, a spring, and a connecting plate, allows the damping rod to dissipate vibration energy through its elastic deformation when the hydraulic breaker vibrates or impacts. This reduces the vibration amplitude of the cover plate and minimizes fatigue damage to the connecting bolts caused by vibration. It also prevents hard collisions between the cover plate and surrounding components. When the damping rod is compressed due to impact, the spring is simultaneously compressed and stores elastic potential energy. After the impact disappears, the spring releases its potential energy to push the damping rod back to its original position, maintaining the fitting accuracy between the side cover and the cylinder body. This prevents the side cover gap from increasing due to the damping rod's inability to return to its original position. The shock-absorbing pad isolates the damping rod from direct contact with the cover plate, preventing metal wear caused by vibration and avoiding abnormal noises caused by hard material contact. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cover plate structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the damping rod structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the positioning plate structure of this utility model.

[0023] In the diagram: 1. Cover plate; 2. Damping rod; 3. Vibration-absorbing pad; 4. Spring; 5. Connecting plate; 6. Locking hole; 7. Double-acting screw; 8. First nut; 9. Second nut; 10. Positioning plate; 11. Connecting hole; 12. Fastening rod; 13. Third nut. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] Example 1;

[0026] Please see Figures 1 to 3 This utility model provides a technical solution: a breaker side cover connecting device that is easy to maintain. This breaker side cover connecting device is mainly used in side cover installation and connection scenarios. It includes a cover plate 1, with multiple locking holes 6 for limiting movement on one side of the cover plate 1. The outer surface of the cover plate 1 has friction textures for anti-slip. The inner walls of the multiple locking holes 6 are each fitted with a bidirectional screw 7 for connection. One end of the bidirectional screw 7 is fixedly connected to one end of a damping rod 2. The outer surface of the bidirectional screw 7 is threaded with a first nut 8 for fastening. The multiple locking holes 6 are distributed at a preset interval, which can be adjusted according to the damping... The number and position of the damping rods 2 are installed accordingly to prevent the bidirectional screw 7 from shifting laterally due to vibration, while ensuring that the cover plate 1 is subjected to uniform force. At the same time, the two ends of the bidirectional screw 7 can be connected to the cover plate 1 and the damping rod 2 respectively, replacing the traditional welding or one-piece molding structure. During maintenance, only the first nut 8 needs to be removed to separate the cover plate 1 and the damping rod 2 without replacing the whole part, which facilitates maintenance. At the same time, the first nut 8 initially tightens the connection between the bidirectional screw 7 and the cover plate 1 to prevent the screw from loosening, while the friction texture on the outer surface increases the grip friction of the hand or tool, preventing slippage when tightening or disassembling, and improving the efficiency of maintenance operations.

[0027] Example 2;

[0028] Please see Figures 2 to 4The outer surface of the first nut 8 has friction grooves for anti-slip. A second nut 9 for fastening is threaded onto the outer surface of the double-ended screw 7 near the first nut 8. The lower end of the second nut 9 abuts against the lower end of the first nut 8. A damping rod 2 for buffering is detachably connected to one side of the cover plate 1. A shock-absorbing pad 3 is provided on the end face of the damping rod 2 that contacts the cover plate 1. A spring 4 for reset is sleeved on the outer surface of the damping rod 2. A connecting disc 5 for positioning is provided at the end of the damping rod 2 away from the cover plate 1. One side of the connecting disc 5 is detachably connected to one end of the spring 4. The second nut 9 and the first nut 8 form a double-nut anti-loosening structure. The bottom-blocking vibration causes the bidirectional screw 7 to loosen. When tightening, the lower end of the second nut 9 abuts against the lower end of the first nut 8. The axial pressure between the two generates a reverse friction force, which counteracts the loosening torque of the thread caused by vibration. This solves the problem of easy loosening of traditional single nuts under high-frequency vibration and is a key structure for vibration resistance. At the same time, one end of the connecting plate 5 at the lower end of the damping rod 2 is connected to the damping rod 2, and the other end is detachably connected to the spring 4. This ensures that the spring 4 only stretches and extends along the axial direction of the damping rod 2 during vibration, avoiding the spring 4 from shifting or twisting. In addition, the disc structure can increase the contact area between the damping rod 2 and the spring 4, disperse the pressure of the spring 4, and prevent excessive local stress in the spring 4 from causing fatigue fracture.

[0029] Example 3;

[0030] Please see Figures 1 to 4Two positioning plates 10 are fixedly connected to the upper end of the cover plate 1 for limiting positioning. The two positioning plates 10 are symmetrically arranged about the vertical center line of the cover plate 1. Each of the two positioning plates 10 has a connecting hole 11 for positioning on one side. A fastening rod 12 for fixing is threaded to the inner wall of the connecting hole 11. A third nut 13 for fixing is threaded to one end of the fastening rod 12. The outer surface of the third nut 13 has friction texture for anti-slip. The positioning plates 10 provide a lateral positioning reference for the cover plate 1, ensuring that the cover plate 1 is aligned with the installation position of the breaker cylinder. The two positioning plates 10 are symmetrically arranged about the vertical center line of the cover plate 1, and can be fixed simultaneously from both ends of the cover plate 1 to avoid tilting during installation and enhance the overall bending rigidity of the cover plate 1. The connecting hole 11 provides a precise installation hole for the fastening rod 12, ensuring the coaxiality of the fastening rod 12 with the positioning plate 10 and the cylinder. The thread precision of the inner wall of the connecting hole 11 matches the thread of the fastening rod 12, avoiding misalignment of the fastening rod 12 due to hole position deviation, thereby preventing deformation of the positioning plate 10 or displacement of the cover plate 1, ensuring the overall sealing performance of the side cover. The fastening rod 12 achieves a fixed connection between the positioning plate 10 and the breaker cylinder body, anchoring the cover plate 1 as a whole on the main body of the equipment. It passes through the connecting hole 11 of the positioning plate 10 to the preset mounting hole of the cylinder body. After the threaded connection, it provides lateral fixing force for the cover plate 1, preventing the cover plate 1 from shifting or falling off under lateral impact. At the same time, the operator tightens the third nut 13, making the connection between the fastening rod 12 and the positioning plate 10 more secure. It also adapts to the needs of maintenance and disassembly. The friction texture design on the outer surface is consistent with that of the first nut 8, which facilitates tool operation. The threaded connection structure supports repeated disassembly. During maintenance, the positioning plate 10 can be loosened simply by unscrewing the third nut 13, further improving the convenience of disassembly and assembly of the cover plate 1.

[0031] In this invention, the working steps of the device are as follows:

[0032] First, attach the shock-absorbing pad 3 to the end face of the damping rod 2 near the cover plate 1, ensuring complete coverage of the contact area. Insert one end of the bidirectional screw 7 into the locking hole 6 of the cover plate 1, and connect the other end to the fixed end of the damping rod 2. Tighten the first nut 8 to the side of the bidirectional screw 7 near the cover plate 1, and then tighten it initially. Tighten the second nut 9 until it abuts against the lower end of the first nut 8, forming a double-nut anti-loosening structure. Sleeve the spring 4 onto the outer surface of the damping rod 2 and push the spring 4 to the end of the damping rod 2 away from the cover plate 1. Install the connecting plate 5 at the end of the damping rod 2, so that one side of the connecting plate 5 is detachably connected to the free end of the spring 4, ensuring that the spring 4 is in a slightly pre-compressed state. Lift the cover plate 1 so that the two positioning plates 10 are aligned with the preset positioning surface of the breaker cylinder, ensuring that the cover plate 1 is in contact with the side of the cylinder. Pass the fastening rod 12 through the connecting hole 11 of the positioning plate 10 and screw it into the corresponding threaded hole of the cylinder, and tighten it initially.

[0033] 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 to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A breaker hammer side cover connection device for easy maintenance, comprising a cover plate (1), characterized in that: A damping rod (2) for buffering is detachably connected to one side of the cover plate (1). A shock-absorbing pad (3) for shock absorption is provided on the end face of the damping rod (2) that is in contact with the cover plate (1). A spring (4) for reset is sleeved on the outer surface of the damping rod (2). A connecting plate (5) for positioning is provided at the end of the damping rod (2) away from the cover plate (1). One side of the connecting plate (5) is detachably connected to one end of the spring (4).

2. The breaker side cover connecting device for easy maintenance according to claim 1, characterized in that: The cover plate (1) has multiple locking holes (6) on one side for limiting the position, and the outer surface of the cover plate (1) has friction texture for anti-slip.

3. The breaker hammer side cover connecting device for easy maintenance according to claim 2, characterized in that: The inner walls of the multiple slots (6) are fitted with bidirectional screws (7) for connection, and one end of the bidirectional screws (7) is fixedly connected to one end of the damping rod (2).

4. The breaker hammer side cover connecting device for easy maintenance according to claim 3, characterized in that: The outer surface of the bidirectional screw (7) is threaded with a first nut (8) for fastening, and the outer surface of the first nut (8) is provided with friction texture for anti-slip.

5. The breaker hammer side cover connecting device for easy maintenance according to claim 4, characterized in that: The outer surface of the bidirectional screw (7) near the first nut (8) is threaded with a second nut (9) for fastening, and the lower end of the second nut (9) abuts against the lower end of the first nut (8).

6. The breaker hammer side cover connecting device for easy maintenance according to claim 1, characterized in that: The upper end of the cover plate (1) is fixedly connected to two positioning plates (10) for limiting the position. The two positioning plates (10) are symmetrically arranged with the vertical center line of the cover plate (1) as the axis of symmetry.

7. A breaker side cover connecting device for easy maintenance according to claim 6, characterized in that: Each of the two positioning plates (10) has a connecting hole (11) for positioning on one side, and a fastening rod (12) for fixing is threaded onto the inner wall of the connecting hole (11).

8. A breaker hammer side cover connecting device for easy maintenance according to claim 7, characterized in that: One end of the fastening rod (12) is threaded with a third nut (13) for fixing, and the outer surface of the third nut (13) is provided with friction texture for anti-slip.

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