Penetrating bolt locking device for breaking hammer
By adding elastic gaskets and positioning gaskets between the locking nut of the breaker and the rear shell, combined with the vibration-absorbing sleeve, the fatigue fracture problem caused by pulse tension and vibration force through the bolt is solved, and the impact resistance of the bolt is improved and stability, extending service life.
Patent Information
- Application Number
- CN202420353615.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The through bolts of existing breakers are prone to fatigue and breakage due to huge pulse tension and vibration force during long-term use. The existing nuts and bolts have no effective impact resistance and vibration absorption capabilities.
Add elastic gaskets between the lock nut and the rear shell and position them by positioning gaskets. Elastic gaskets with special-shaped annular structure and conical structure are used to enhance their vibration absorption capacity, and combined with vibration damping sleeves to reduce the vibration of the bolts and fatigue.
It effectively reduces the risk of fatigue and fracture through bolts, improves the impact resistance and stability of bolts, and extends the service life.
Smart Images
Figure CN222161420U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a through-bolt locking device for a breaker hammer and belongs to the technical field of breaker hammers. Background Art
[0002] Hydraulic breaker is also called breaker hammer. Its power comes from the pressure provided by excavators, loaders or pump stations. It includes a cylinder body, a piston and a drill rod arranged in the cylinder body. The cylinder body includes a front shell, a middle cylinder and a rear shell. The front shell, the middle cylinder and the rear shell are connected by through bolts. The breaker hammer uses the static pressure of the liquid as the power to drive the piston to reciprocate. The piston hits the drill rod at high speed during the stroke, and the drill rod breaks ore, concrete, rock and other solids. It can carry out crushing operations more effectively in engineering construction and improve engineering construction efficiency.
[0003] When the breaker hammer is performing a crushing operation, each time the piston impacts, the rear shell of the breaker hammer will generate huge pulling force on the through bolt, and the through bolt will undergo elastic deformation in the length direction. The rear shell and front shell of the breaker hammer will also transmit the huge vibration of the breaker hammer itself to the through bolt, causing the through bolt to generate a certain shear force in the radial direction, which will cause the through bolt to produce micro-vibration in the radial direction. The free end of the existing through bolt is locked by a nut, and the nut and the gasket are flatly matched without radial freedom and are fixed on the rear shell with a fixed position. The through bolt has radial micro-movement, and the matching position of the through bolt and the nut has almost no micro-vibration due to the action of the nut. After a long period of action, under the dual action of the huge pulse pulling force of the rear shell and the huge vibration force of the breaker hammer, fatigue fracture will occur at the maximum load position of the nut and the bolt, resulting in fatigue fracture of the through bolt. Summary of the invention
[0004] The utility model aims at the deficiencies in the prior art and provides a breaker hammer through-bolt locking device.
[0005] The utility model solves the above-mentioned technical problem through the following technical solution: a through-bolt locking device for a breaker hammer, the breaker hammer comprising a front shell, a middle cylinder, a rear shell and a through-bolt connecting the front shell, the middle cylinder and the rear shell, comprising a locking nut and an elastic gasket arranged between the locking nut and the rear shell, the locking nut being threadedly connected to the rod of the through-bolt, and the elastic gasket being provided with a gasket hole for the rod of the through-bolt to pass through.
[0006] The beneficial effect of the utility model is that an elastic gasket with elasticity is added between the locking nut and the rear shell. When the pulse tension and vibration force exceed the deformation resistance of the elastic gasket, the elastic gasket will undergo elastic deformation, so that the pulse tension and vibration force are converted into deformation of the elastic gasket, reducing the pulse tension and vibration force, thereby reducing the risk of fatigue fracture of the through bolt.
[0007] On the basis of the above technical solution, the present invention can also be improved as follows.
[0008] Furthermore, it also includes a positioning gasket for positioning the elastic gasket, and the positioning gasket is sleeved on the through bolt between the elastic gasket and the rear shell.
[0009] The beneficial effect of adopting the above-mentioned further scheme is that, in order to facilitate the installation of the through bolt, the rod diameter of the through bolt is smaller than the hole diameter of the housing or the cylinder body. The small rod diameter of the through bolt makes it easy for the elastic gasket to be positioned incorrectly when positioning the elastic gasket, so a positioning gasket is added. The positioning gasket can position the elastic gasket mounted on the through bolt.
[0010] Furthermore, an annular rib is provided on the rear end surface of the positioning gasket, and a spring gasket annular groove for positioning the elastic gasket is formed between the annular rib and the rear end surface of the positioning gasket.
[0011] The beneficial effect of adopting the above further solution is that the annular rib can limit the periphery of the elastic gasket and achieve stable positioning of the elastic gasket through the formed elastic gasket ring groove; not only that, the design of the elastic ring groove also facilitates the installation of the elastic gasket.
[0012] Furthermore, a gasket ring groove for positioning the positioning gasket is provided on the rear end surface of the rear shell, and a screw gasket convex ring matched with the gasket ring groove is provided on the front end surface of the positioning gasket.
[0013] The beneficial effect of adopting the above further scheme is that the positioning gasket can be positioned through the gasket ring groove on the rear shell. Specifically, the screw gasket convex ring on the positioning gasket is positioned and installed in the gasket ring groove of the rear shell. Through the cooperation of the two, the positioning gasket can be stably positioned, and the positioning installation of the positioning gasket is facilitated.
[0014] Furthermore, the elastic gasket is in a ring-shaped structure with a high inner edge and a low outer edge, and the cross-section of the elastic gasket is in a conical structure.
[0015] The beneficial effect of adopting the above further scheme is that the elastic gasket is high inside and low outside, forming an inwardly arched state. The elasticity of the elastic gasket is better and the vibration absorption ability is stronger. It can reduce pulse tension and vibration force and avoid fatigue fracture at the mating position of the through bolt and the nut.
[0016] Furthermore, the inclination angle of the end face of the elastic gasket is 1-5 degrees.
[0017] The beneficial effect of adopting the above further solution is that the elastic gasket can have a better deformation ability to absorb pulse tension and vibration shear force.
[0018] Furthermore, the inclination angle of the end face of the elastic gasket is 3 degrees.
[0019] The beneficial effect of adopting the above further solution is that it can not only have good vibration absorption and deformation capabilities, but also meet the requirements of the elastic gasket's own stability.
[0020] Furthermore, the elastic gasket is a special-shaped annular structure.
[0021] The beneficial effect of adopting the above further solution is that the special-shaped elastic gasket can have a better deformation capacity to absorb pulse tension and vibration shear force, thereby reducing the risk of fatigue fracture of the through bolt.
[0022] Furthermore, the body of the elastic gasket is evenly distributed with a plurality of protrusions and depressions in the circumferential direction, and the elastic gasket as a whole presents a corrugated annular structure.
[0023] The beneficial effect of adopting the above further solution is that a plurality of protrusions and depressions are formed on the front end face and the rear end face of the elastic gasket, so that the elastic gasket can have better elasticity, vibration absorption deformation ability and impact resistance.
[0024] Furthermore, the elastic gasket is made of spring steel.
[0025] The beneficial effect of adopting the above further scheme is that the elastic gasket can maintain good elastic deformation and is not easy to break. At the same time, it has good toughness and plasticity, and can withstand a certain deformation without cracking or deformation; it can also resist greater bending and torsional forces, so that the spring has better resilience and stability.
[0026] Furthermore, vibration-damping sleeves are respectively provided between the through bolts and the middle cylinder and the rear shell.
[0027] The beneficial effect of adopting the above further solution is that the through bolt has a vibration-damping positioning groove for locating the vibration-damping sleeve. There is a vibration-damping sleeve between the through bolt and the rear shell; there is a vibration-damping sleeve between the through bolt and the middle cylinder; when the through bolt vibrates, the vibration-damping sleeve will be squeezed by the through bolt to absorb the vibration, which can reduce the amplitude of the through bolt, reduce the fatigue strength of the through bolt and the risk of fracture of the through bolt. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0029] Figure 2 for Figure 1 A partial enlarged view of point I in the middle;
[0030] Figure 3 for Figure 1 A schematic diagram of the structure of the elastic gasket in FIG.
[0031] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;
[0032] Figure 5 for Figure 4 A partial enlarged view of the middle part;
[0033] Figure 6 This is a schematic diagram of the structure of the elastic gasket in Example 2 of the utility model;
[0034] Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of;
[0035] Figure 8 This is a schematic diagram of the three-dimensional structure of the elastic gasket in Example 2 of the utility model;
[0036] Fig. 9 It is a schematic diagram of the cross-sectional structure of the positioning gasket of the utility model;
[0037] Fig.10 This is a structural schematic diagram of angle 1 of the positioning gasket of the utility model;
[0038] Fig.11 This is a structural schematic diagram of angle 2 of the positioning gasket of the utility model;
[0039] Fig.12 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;
[0040] Fig.13 for Fig.12 A partial enlarged view of point B in the middle;
[0041] Fig.14 This is a schematic diagram of the structure of the elastic gasket in Example 3 of the utility model;
[0042] Fig.15 for Fig.14 A schematic diagram of the cross-sectional structure of;
[0043] Fig.16 This is a schematic structural diagram of angle 1 of the elastic gasket in Example 3 of the utility model;
[0044] Fig.17 This is a schematic structural diagram of angle 2 of the elastic gasket in Example 3 of the utility model;
[0045] In the figure, 1, front shell; 2, middle cylinder; 3, rear shell; 31, gasket ring groove; 4, through bolt; 5, locking nut; 6, elastic gasket; 61, ridge; 62, depression; 7, positioning gasket; 71, annular rib; 72, spring gasket ring groove; 73, screw gasket convex ring; 8, vibration damping sleeve. DETAILED DESCRIPTION
[0046] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.
[0047] Embodiment 1, as Figure 1-Figure 3 As shown, a locking device for a through-bolt 4 of a breaker hammer, the breaker hammer includes a front shell 1, a middle cylinder 2, a rear shell 3 and a through-bolt 4 connecting the front shell 1, the middle cylinder 2 and the rear shell 3, including a locking nut 5 and an elastic gasket 6 arranged between the locking nut 5 and the rear shell 3, the locking nut 5 is threadedly connected to the rod of the through-bolt 4, and the elastic gasket 6 is provided with a gasket hole for the rod of the through-bolt 4 to pass through.
[0048] The elastic gasket 6 is a special-shaped annular structure. The special-shaped elastic gasket 6 can have a better deformation capacity to absorb pulse tension and vibration shear force, thereby reducing the risk of fatigue fracture of the through bolt 4.
[0049] The body of the elastic gasket 6 is evenly distributed with a plurality of ridges 61 and depressions 62 in the circumferential direction, and the elastic gasket 6 is in a corrugated annular structure. The elastic gasket 6 is formed with a plurality of ridges 61 and depressions 62 on its front and rear surfaces, so that the elastic gasket 6 has better elasticity, vibration absorption deformation ability and impact resistance. The front and rear indication orientation relationship in the front shell 1 and the rear shell 3 is based on the attached Figure 1 The orientation relationship shown is only for the convenience of describing the present invention and should not be construed as a limitation to the present invention.
[0050] The elastic gasket 6 is made of spring steel. The elastic gasket 6 can maintain good elastic deformation and is not easy to break. It also has good toughness and plasticity, can withstand certain deformation without cracks or deformation, and can also resist greater bending and torsion forces, so that the spring has better resilience and stability.
[0051] A vibration-damping sleeve 8 is provided between the through bolt 4 and the middle cylinder 2 and the rear shell 3, respectively. A vibration-damping positioning groove for positioning the vibration-damping sleeve 8 is provided on the through bolt 4. A vibration-damping sleeve 8 is provided between the through bolt 4 and the rear shell 3; a vibration-damping sleeve 8 is provided between the through bolt 4 and the middle cylinder 2; when the through bolt 4 vibrates, the vibration-damping sleeve will be squeezed by the through bolt 4 to absorb the vibration, which can reduce the amplitude of the through bolt 4, reduce the fatigue strength of the through bolt 4 and the risk of fracture of the through bolt 4.
[0052] Embodiment 2, as Figure 4-Figure 11As shown, on the basis of embodiment 1, a positioning gasket 7 for positioning the elastic gasket is further included, and the positioning gasket 7 is sleeved on the through bolt 4 between the elastic gasket 6 and the rear shell 3. In order to facilitate the installation of the through bolt 4, the rod diameter of the through bolt 4 is smaller than the hole diameter of the housing or the cylinder body. When the rod diameter of the through bolt 4 is small, the elastic gasket is prone to positioning deviation when positioning the elastic gasket 6, so a positioning gasket 7 is added, and the positioning gasket 7 can position the elastic gasket 6 sleeved on the through bolt 4.
[0053] An annular rib 71 is provided on the rear end face of the positioning gasket 7, and a spring washer annular groove 72 for positioning the elastic gasket 6 is formed between the annular rib 71 and the rear end face of the positioning gasket 7. The annular rib 71 can limit the periphery of the elastic gasket 6, and the elastic gasket 6 can be stably positioned through the formed spring washer annular groove 72; not only that, the design of the elastic annular groove also facilitates the installation and positioning of the elastic gasket 6.
[0054] The rear end surface of the rear shell 3 is provided with a gasket ring groove 31 for positioning the positioning gasket 7, and the front end surface of the positioning gasket 7 is provided with a screw washer convex ring 73 adapted to the gasket ring groove 31. The positioning gasket 7 can be positioned through the gasket ring groove 31 on the rear shell 3, specifically, the screw washer convex ring 73 on the positioning gasket 7 is positioned and installed in the gasket ring groove 31 of the rear shell 3, and the stable positioning of the positioning gasket 7 is achieved through the cooperation of the two, and the positioning installation of the positioning gasket 7 is also facilitated.
[0055] The elastic gasket 6 is an annular structure with a high inner edge and a low outer edge, and the cross section of the elastic gasket 6 is a conical structure. The elastic gasket 6 is high inside and low outside and is in an inwardly arched state. The elastic gasket 6 has better elasticity and stronger vibration absorption ability, which can reduce pulse tension and vibration force, and avoid fatigue fracture at the matching position of the through bolt 4 and the nut.
[0056] The end surface inclination angle α of the elastic gasket 6 is 1-5 degrees, so that the elastic gasket can have a better deformation ability to absorb pulse tension and vibration shear force.
[0057] The end surface inclination angle α of the elastic gasket 6 is 3 degrees, which not only has good vibration absorption and deformation capability, but also meets the requirements of the elastic gasket's own stability.
[0058] Embodiment 3, as Figure 12-Figure 17 As shown, the elastic gasket 6 is a special-shaped ring structure. The special-shaped elastic gasket 6 can have a better deformation capacity to absorb pulse tension and vibration shear force, thereby reducing the risk of fatigue fracture of the through bolt 4.
[0059] The body of the elastic gasket 6 is evenly distributed with a plurality of protrusions 61 and depressions 62 in the circumferential direction, and the elastic gasket 6 is in a corrugated annular structure as a whole. The elastic gasket 6 forms a plurality of protrusions 61 and depressions 62 on its front end face and rear end face, so that the elastic gasket 6 can have better elasticity, vibration absorption deformation ability and impact resistance. The rest of the structure is the same as that of the embodiment 2, so it will not be described in detail here.
[0060] In Example 4, the elastic gasket 6 is an annular structure with a high inner edge and a low outer edge, and the cross section of the elastic gasket 6 is a conical structure. The elastic gasket 6 is high inside and low outside and is in an inwardly arched state. The elastic gasket 6 has better elasticity and stronger vibration absorption ability, which can reduce pulse tension and vibration force, and avoid fatigue fracture at the matching position of the through bolt 4 and the nut.
[0061] The end surface inclination angle α of the elastic gasket 6 is 1-5 degrees, so that the elastic gasket can have a better deformation ability to absorb pulse tension and vibration shear force.
[0062] The end surface inclination angle α of the elastic gasket 6 is 3 degrees. It can have good vibration absorption and deformation capability, and can also meet the requirements of the elastic gasket's own stability. The rest of the structure is the same as the embodiment, so it will not be described here.
[0063] The utility model adds an elastic gasket 6 with elasticity and a positioning gasket 7 for positioning the elastic gasket 6 between the locking nut 5 and the rear shell 3, which not only facilitates the installation and positioning of the elastic gasket, but also when the pulse tension peak value and the vibration force peak value exceed the deformation resistance of the elastic gasket 6, the elastic gasket 6 will undergo elastic deformation, so that the pulse tension and vibration force are converted into deformation of the elastic gasket 6, reducing the pulse tension peak value and the vibration force peak value, thereby reducing the risk of fatigue fracture of the through bolt 4.
[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A through-bolt locking device for a breaker hammer, the breaker hammer comprising a front shell (1), a middle cylinder (2), a rear shell (3) and a through-bolt (4) connecting the front shell (1), the middle cylinder (2) and the rear shell (3), It is characterized in that It comprises a locking nut (5) and an elastic gasket (6) arranged between the locking nut and the rear shell, the locking nut (5) being threadedly connected to the rod of the through bolt (4), and the elastic gasket (6) being provided with a gasket hole for the rod of the through bolt (4) to pass through.
2. The breaker hammer through bolt locking device according to claim 1, It is characterized in that It also includes a positioning gasket (7) for positioning the elastic gasket (6), and the positioning gasket is sleeved on the through bolt between the elastic gasket and the rear shell.
3. The breaker hammer through bolt locking device according to claim 2, It is characterized in that An annular rib (71) is provided on the rear end surface of the positioning gasket (7), and a spring washer annular groove (72) for positioning the elastic gasket (6) is formed between the annular rib (71) and the rear end surface of the positioning gasket (7); And / or a gasket ring groove (31) for positioning the positioning gasket (7) is provided on the rear end face of the rear shell (3), and a screw washer convex ring (73) matched with the gasket ring groove (31) is provided on the front end face of the positioning gasket (7).
4. The breaker hammer through bolt locking device according to claim 1, 2 or 3, It is characterized in that The elastic gasket (6) is in the form of an annular structure with a high inner edge and a low outer edge, and the cross section of the elastic gasket (6) is in the form of a cone.
5. The breaker hammer through bolt locking device according to claim 4, It is characterized in that The end face inclination angle of the elastic gasket (6) is 1-5 degrees.
6. The breaker hammer through bolt locking device according to claim 5, It is characterized in that The end face inclination angle of the elastic gasket (6) is 3 degrees.
7. The breaker hammer through bolt locking device according to claim 1, 2 or 3, It is characterized in that The elastic gasket (6) is a special-shaped annular structure.
8. The breaker hammer through bolt locking device according to claim 7, It is characterized in that The body of the elastic gasket (6) is evenly distributed with a plurality of protrusions (61) and depressions (62) in the circumferential direction, and the elastic gasket (6) is in the form of a corrugated annular structure as a whole.
9. The breaker hammer through bolt locking device according to claim 1, 2 or 3, It is characterized in that The elastic gasket (6) is made of spring steel.
10. The breaker hammer through bolt locking device according to claim 1, It is characterized in that Vibration-damping sleeves (8) are respectively provided between the through bolt (4), the middle cylinder (2) and the rear shell (3).