Right-angle type hydraulic breaking hammer

By designing a right-angle hydraulic breaker with a steering and drive mechanism, the breaker head can rotate freely in the X, Y, and Z axes, solving the problems of flexibility and reliability in narrow spaces and achieving efficient and safe breaker operations.

CN121539042APending Publication Date: 2026-02-17SHANDONG HONGFANG HYDRAULIC TECH GRP CO LTD
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Patent Information

Application Number
CN202511899659.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-16
Publication Date
2026-02-17

AI Technical Summary

Technical Problem

Existing hydraulic breakers lack flexibility and reliability in confined spaces, and traditional improvement measures sacrifice power performance or increase maintenance costs.

Method used

Design a right-angle hydraulic breaker, employing a steering mechanism and a drive mechanism. The breaker head can rotate freely within ±90° in the X, Y, and Z axes. Combined with a rack and pinion structure and cylinder drive, the driving force and stability are improved.

Benefits of technology

It enhances the equipment's flexibility and applicability in confined spaces, improves energy efficiency, reduces labor intensity, and maintains strong impact force and stable performance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of rock crushing in building construction and mining, in particular to a right-angle type hydraulic crushing hammer which comprises a crushing cylinder body, a crushing head, a steering mechanism, a driving mechanism and a supporting mechanism, and the crushing head and the steering mechanism are arranged at the center of the crushing cylinder body and used for adjusting the crushing angle of the crushing head; the steering mechanism is arranged at the top of the crushing cylinder body, the driving mechanism is arranged on the base, the supporting mechanism is arranged on the side, away from the steering mechanism, of the driving mechanism, and by means of the arrangement of the steering mechanism, when the crushing head is used, the angle of the crushing head can be adjusted in the X-axis direction, the Y-axis direction and the Z-axis direction according to the actual situation of a construction site; the steering mechanism has the function of freely rotating within the range of + / -90 degrees due to the arrangement of the driving mechanism, the flexibility and the applicability of the equipment are greatly enhanced, and the steering mechanism can obtain strong driving force and can also obtain stable support through the driving of the adjusting air cylinder by utilizing the arrangement of the driving mechanism.
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Description

Technical Field

[0001] This application relates to the technical field of rock breaking in construction and mining, and in particular to a right-angled hydraulic breaker. Background Technology

[0002] Most hydraulic breakers on the market today are designed in a straight line. Although this design is conducive to the effective transmission of force, it makes operation very difficult in certain environments, especially in narrow spaces or corners, which limits work efficiency and application scope. With the acceleration of urbanization and the deepening of resource development, the demand for mechanical equipment that can work efficiently in complex terrain conditions is growing.

[0003] Currently, in order to overcome the limitations of traditional linear hydraulic breakers in special environments, the industry has proposed several improvement measures. On the one hand, some manufacturers improve flexibility by reducing the overall size of the equipment, but this is usually accompanied by the problem of reduced power. On the other hand, some manufacturers have tried to adopt a rotating head design, which improves adaptability, but the addition of extra moving parts leads to increased maintenance costs and reduced reliability. These methods have their own advantages and disadvantages, but they also have obvious shortcomings.

[0004] In related technologies, although the above-mentioned improvements have alleviated the problem of using traditional linear hydraulic breakers in narrow spaces to some extent, they still cannot fundamentally solve the problem. Reducing the size sacrifices the machine's power performance, while adding a rotating mechanism brings complexity and instability risks, failing to fully meet market demands. Summary of the Invention

[0005] To address the challenge of achieving flexible operation of equipment in confined spaces while maintaining strong crushing capacity and high reliability, this application provides a right-angle hydraulic breaker.

[0006] The right-angle hydraulic breaker provided in this application adopts the following technical solution: A right-angle hydraulic breaker, comprising: A crushing cylinder body, wherein a crushing head is provided at the center of the crushing cylinder body; A steering mechanism is used to adjust the crushing angle of the crushing head, and the steering mechanism is located on the top of the crushing cylinder. The steering mechanism includes a base, an axial support frame, a radial support frame, and a docking rod. The axial support frame is rotatably connected to the base. One end of the radial support frame is rotatably connected to one side of the axial support frame. The docking rod is rotatably connected to the end of the radial support frame away from the axial support frame, and the crushing cylinder is fixed to the docking rod. A drive mechanism for driving the components of the steering mechanism, the drive mechanism being mounted on the base; A support mechanism is provided for supporting the drive mechanism, and the support mechanism is disposed on the drive mechanism on a side away from the steering mechanism.

[0007] By adopting the above technical solution and utilizing the steering mechanism, the angle of the crushing head can be adjusted in the X, Y and Z axis directions according to the actual conditions of the construction site, allowing it to rotate freely within a range of ±90°. This greatly enhances the flexibility and applicability of the equipment, significantly improves its ability to operate in confined spaces, and broadens its application scope. By utilizing the drive mechanism and adjusting the cylinder drive, the steering mechanism can obtain both powerful driving force and stable support. Through the one-to-one corresponding rack and pinion structure and optimized design, unnecessary energy loss is reduced and energy utilization is improved. The unique steering mechanism makes operation simpler and safer, and reduces labor intensity. This hydraulic breaker not only inherits the advantages of traditional hydraulic breakers—powerful impact force and stable performance—but also incorporates several innovations specifically designed for applications in confined spaces.

[0008] Optionally, the steering mechanism further includes a first transmission rod, a second transmission rod, a first driving bevel gear, and a first driven bevel gear. The first transmission rod is rotatably connected to the center of the base, and one end of the first transmission rod is fixed to the center of the axial support frame. The second transmission rod is coaxially rotatably connected to the axis of the first transmission rod and passes through the axial support frame. The first driving bevel gear is coaxially fixed to one end of the second transmission rod near the axial support frame. The first driven bevel gear is coaxially fixed to the radial support frame at the connection end with the axial support frame, and the first driving bevel gear and the first driven bevel gear mesh with each other.

[0009] By adopting the above technical solution, the first transmission rod drives the axial support frame to rotate axially, and at the same time, the second transmission rod drives the first active bevel gear to rotate, thereby enabling the first driven bevel gear to mesh and move together. The first driven bevel gear drives the radial support frame and the crushing head to rotate radially, realizing the rapid adjustment of the angle of the crushing head in the X and Y axis directions, which is simple and efficient.

[0010] Optionally, the steering mechanism further includes a third transmission rod, a second driving bevel gear, a linkage bevel gear, and a second driven bevel gear. The third transmission rod is coaxially rotatably connected to the axis of the second transmission rod and passes through the first driving bevel gear. The second driving bevel gear is coaxially fixed to the third transmission rod at one end near the first driving bevel gear. The linkage bevel gear is rotatably connected to the axial support frame at one end away from the first driven bevel gear. The second driven bevel gear is coaxially fixed to the docking rod at one end away from the crushing cylinder, and the linkage bevel gear meshes between the second driving bevel gear and the second driven bevel gear.

[0011] By adopting the above technical solution, the third transmission rod drives the second active bevel gear to rotate, and the linkage bevel gear enables the second driven bevel gear to mesh synchronously and move together, thereby driving the crushing cylinder to rotate through the docking rod, thus realizing the adjustment of the crushing head in the Z-axis direction.

[0012] Optionally, the drive mechanism includes a first transmission gear, a second transmission gear, and a third transmission gear, wherein the first transmission gear is coaxially fixed on the first transmission rod, the second transmission gear is coaxially fixed on the second transmission rod, and the third transmission gear is coaxially fixed on the third transmission rod.

[0013] By adopting the above technical solution and utilizing the arrangement of multiple transmission gears, multiple transmission rods can be controlled separately, effectively improving the control accuracy.

[0014] Optionally, the drive mechanism further includes a limiting seat, a sliding groove, and a rack. The limiting seat is fixed on the base, the sliding groove is recessed on the limiting seat, and the rack is slidably engaged in the sliding groove. Multiple sliding grooves and racks are provided, and they are arranged one-to-one with the first transmission gear, the second transmission gear, and the third transmission gear.

[0015] By adopting the above technical solution, the sliding of the rack drives the transmission gears to move together, thereby realizing the linkage adjustment of various components in the steering mechanism.

[0016] Optionally, the drive mechanism further includes an adjusting rod and an adjusting cylinder. The adjusting rod is fixed to one end of the rack, the fixing part of the adjusting cylinder is fixed to the limiting seat, and the telescopic part of the adjusting cylinder is connected to the end of the adjusting rod away from the rack.

[0017] By adopting the above technical solution, the extension and retraction of the regulating cylinder and the linkage of the regulating rod with the corresponding rack are used to achieve linkage.

[0018] Optionally, the support mechanism includes a support base and a main cylinder. The support base is fixed to an external fixing structure, the fixing part of the main cylinder is fixed at the center of the support base, and the telescopic part of the main cylinder is fixed to the base.

[0019] By adopting the above technical solution, the main cylinder is used to extend and retract to drive the crushing head to perform crushing operations.

[0020] Optionally, the support mechanism further includes a positioning plate and a guide rod. The positioning plate is fixed to the side wall of the base, and the guide rod is fixed to the support. A through hole is provided through the positioning plate, and the guide rod is slidably engaged in the through hole of the positioning plate.

[0021] By adopting the above technical solution, the base is guided by a guide rod, enabling it to move in a specific direction.

[0022] Optionally, a positioning disc is coaxially fixed to one end of the guide rod away from the support, and the diameter of the positioning disc is larger than the through hole of the positioning plate.

[0023] By adopting the above technical solution, the positioning plate is used to limit the guide rod and prevent it from separating from the positioning plate.

[0024] Optionally, the slide groove has a trapezoidal cross-section, and a trapezoidal protrusion is provided on the rack, the protrusion of the rack cooperating with the slide groove.

[0025] By adopting the above technical solution, the rack is limited by a trapezoidal structure, thus preventing the rack from separating from the limiting seat.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By utilizing the steering mechanism, the angle of the breaker head can be adjusted in the X, Y, and Z axes according to the actual conditions of the construction site, allowing it to rotate freely within a range of ±90°. This greatly enhances the flexibility and applicability of the equipment, significantly improves its ability to operate in confined spaces, and broadens its application scope. 2. By utilizing the drive mechanism and adjusting the cylinder drive, the steering mechanism can obtain both strong driving force and stable support. Through the one-to-one corresponding rack and pinion structure, the optimized design reduces unnecessary energy loss and improves energy utilization. The unique steering mechanism makes operation simpler and safer, and reduces labor intensity. This hydraulic breaker not only inherits the advantages of traditional hydraulic breakers—powerful impact force and stable performance—but also incorporates several innovations specifically designed for applications in confined spaces. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the external structure of a right-angled hydraulic breaker in this embodiment.

[0028] Figure 2 This is a schematic diagram of the steering mechanism in this embodiment.

[0029] Figure 3 This is a schematic diagram of the drive mechanism structure in this embodiment.

[0030] Figure 4 This is a schematic diagram of the axial support frame connection structure in this embodiment.

[0031] Figure 5 This is a schematic diagram of the first active bevel gear connection structure in this embodiment.

[0032] Figure 6 This is a schematic diagram of the second driving bevel gear and its overall connection structure in this embodiment.

[0033] Figure 7 This is a schematic diagram of the overall connection structure of the limiting seat in this embodiment.

[0034] Explanation of reference numerals in the attached figures: 1. Crushing cylinder body; 2. Crushing head; 3. Steering mechanism; 31. Base; 32. Axial support frame; 33. Radial support frame; 34. Connecting rod; 35. First transmission rod; 36. Second transmission rod; 37. First driving bevel gear; 38. First driven bevel gear; 39. Third transmission rod; 310. Second driving bevel gear; 311. Linkage bevel gear; 312. Second driven bevel gear; 4. Drive mechanism; 41. First transmission gear; 42. Second transmission gear; 43. Third transmission gear; 44. Limit seat; 45. Slide groove; 46. Rack; 47. Adjusting rod; 48. Adjusting cylinder; 5. Support mechanism; 51. Support seat; 52. Main cylinder; 53. Positioning plate; 54. Guide rod; 55. Positioning disc. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0036] This application discloses a right-angled hydraulic breaker.

[0037] It should be noted that, in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Reference Figure 1 and Figure 2 A right-angle hydraulic breaker includes a crushing cylinder 1, a crushing head 2, a steering mechanism 3, a drive mechanism 4, and a support mechanism 5. The crushing head 2 is located at the center of the crushing cylinder 1. The steering mechanism 3 is used to adjust the crushing angle of the crushing head 2 and is located on the top of the crushing cylinder 1. The drive mechanism 4 is mounted on a base 31, and the support mechanism 5 is located on the side of the drive mechanism 4 away from the steering mechanism 3. The steering mechanism 3 allows the crushing head 2 to be adjusted in the X, Y, and Z axes according to the actual conditions of the construction site, enabling it to rotate freely within a range of ±90°, greatly enhancing its functionality. This design enhances the flexibility and applicability of the equipment, significantly improving its ability to operate in confined spaces and broadening its application scope. Furthermore, by utilizing the drive mechanism 4 and adjusting the drive of the cylinder 48, the steering mechanism 3 can obtain both powerful driving force and stable support. Through the one-to-one corresponding rack and pinion structure 46, optimized design reduces unnecessary energy loss and improves energy efficiency. The unique steering mechanism also makes operation simpler and safer, reducing labor intensity. This hydraulic breaker not only inherits the advantages of traditional hydraulic breakers—powerful impact force and stable performance—but also incorporates several innovations specifically designed for applications in confined spaces.

[0039] Reference Figure 3 and Figure 4 Specifically, in this embodiment, regarding the steering mechanism 3, the steering mechanism 3 includes a base 31, an axial support frame 32, a radial support frame 33, a connecting rod 34, a first transmission rod 35, a second transmission rod 36, a first driving bevel gear 37, and a first driven bevel gear 38. The first transmission rod 35 drives the axial support frame 32 to rotate axially, and simultaneously drives the first driving bevel gear 37 to rotate using the second transmission rod 36, thereby enabling the first driven bevel gear 38 to mesh and move together. Through the first driven bevel gear 38, the radial support frame 33 and the entire crushing head 2 can rotate radially, realizing rapid adjustment of the angle of the crushing head 2 in the X-axis and Y-axis directions, which is simple and efficient.

[0040] Specifically, the axial support frame 32 is rotatably connected to the base 31, one end of the radial support frame 33 is rotatably connected to one side of the axial support frame 32, the connecting rod 34 is rotatably connected to the end of the radial support frame 33 away from the axial support frame 32, and the crushing cylinder 1 is fixed to the connecting rod 34. The first transmission rod 35 is rotatably connected to the center of the base 31, and one end of the first transmission rod 35 is fixed to the center of the axial support frame 32. The second transmission rod 36 is coaxially rotatably connected to the axis of the first transmission rod 35 and passes through the axial support frame 32. The first driving bevel gear 37 is coaxially fixed to the end of the second transmission rod 36 near the axial support frame 32. The first driven bevel gear 38 is coaxially fixed to the connecting end of the radial support frame 33 and the axial support frame 32, and the first driving bevel gear 37 and the first driven bevel gear 38 mesh with each other.

[0041] In this embodiment, the steering mechanism 3 further includes a third transmission rod 39, a second driving bevel gear 310, a linkage bevel gear 311, and a second driven bevel gear 312. The third transmission rod 39 drives the second driving bevel gear 310 to rotate, and the linkage bevel gear 311 enables the second driven bevel gear 312 to mesh synchronously. In turn, the docking rod 34 drives the crushing cylinder 1 to rotate, thereby achieving adjustment of the crushing head 2 in the Z-axis direction.

[0042] The third transmission rod 39 is coaxially rotatably connected to the axis of the second transmission rod 36 and passes through the first driving bevel gear 37. The second driving bevel gear 310 is coaxially fixed on the third transmission rod 39 at one end close to the first driving bevel gear 37. The linkage bevel gear 311 is rotatably connected to the axial support frame 32 at one end away from the first driven bevel gear 38. The second driven bevel gear 312 is coaxially fixed on the docking rod 34 at one end away from the crushing cylinder 1, and the linkage bevel gear 311 meshes between the second driving bevel gear 310 and the second driven bevel gear 312.

[0043] Reference Figure 5 and Figure 6 In this embodiment of the application, the drive mechanism 4 includes a first transmission gear 41, a second transmission gear 42, a third transmission gear 43, a limit seat 44, a slide groove 45, a rack 46, an adjusting rod 47, and an adjusting cylinder 48. By using multiple transmission gears, multiple transmission rods can be controlled separately, which effectively improves the control accuracy. The sliding of the rack 46 drives the transmission gears to move in linkage, thereby realizing the linkage adjustment of each component in the steering mechanism 3.

[0044] Reference Figure 7In this embodiment, the first transmission gear 41 is coaxially fixed on the first transmission rod 35, the second transmission gear 42 is coaxially fixed on the second transmission rod 36, the third transmission gear 43 is coaxially fixed on the third transmission rod 39, the limiting seat 44 is fixed on the base 31, the sliding groove 45 is recessed in the limiting seat 44, the rack 46 is slidably engaged in the sliding groove 45, and multiple sliding grooves 45 and racks 46 are provided, corresponding one-to-one with the first transmission gear 41, the second transmission gear 42 and the third transmission gear 43. The adjusting rod 47 is fixed to one end of the rack 46, the fixing part of the adjusting cylinder 48 is fixed on the limiting seat 44, and the telescopic part of the adjusting cylinder 48 is connected to the end of the adjusting rod 47 away from the rack 46.

[0045] Specifically, in this embodiment of the application, the support mechanism 5 includes a support base 51, a main cylinder 52, a positioning plate 53, and a guide rod 54. The main cylinder 52 is used to extend and retract to drive the crushing head 2 to perform crushing operations, and the guide rod 54 is used to guide the base 31 so that it can move in a specific direction.

[0046] The support 51 is fixed to the external fixed structure. The fixed part of the main cylinder 52 is fixed at the center of the support 51. The telescopic part of the main cylinder 52 is fixed to the base 31. The positioning plate 53 is fixed to the side wall of the base 31. The guide rod 54 is fixed to the support 51 and has a through hole in the positioning plate 53. The guide rod 54 is slidably engaged in the through hole of the positioning plate 53.

[0047] Specifically, a positioning disc 55 is coaxially fixed to one end of the guide rod 54 away from the support seat 51. The diameter of the positioning disc 55 is larger than the through hole of the positioning plate 53. Using the above technical solution, the positioning disc 55 is used to limit the guide rod 54 and prevent it from separating from the positioning plate 53.

[0048] In this embodiment, the slide groove 45 has a trapezoidal cross-section, and a trapezoidal protrusion is provided on the rack 46. The protrusion of the rack 46 cooperates with the slide groove 45, and the trapezoidal structure is used to limit the rack 46 to prevent the rack 46 from separating from the limiting seat 44.

[0049] The implementation principle of a right-angle hydraulic breaker according to an embodiment of this application is as follows: First, the support 51 is connected to the external fixed structure. Before crushing, the angle of the breaker head 2 is adjusted according to the actual construction situation. During adjustment, the extension and retraction of the telescopic part of the adjusting cylinder 48 at the corresponding position is controlled, thereby driving the rack 46 to slide. At this time, the rack 46 drives the transmission gear to mesh and link together, and drives the transmission rod at the corresponding position to rotate through the transmission, thereby enabling the various components inside the steering mechanism 3 to be linked together, thereby realizing the rapid adjustment of the angle of the breaker head 2 on the X, Y and Z axes respectively. After the breaker head 2 is adjusted to the appropriate angle, the extension and retraction of the main cylinder 52 drives the breaker head 2 to link together.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A right-angled hydraulic breaker, characterized in that, include: Crushing cylinder (1), with a crushing head (2) provided at the center of the crushing cylinder (1); A steering mechanism (3) is used to adjust the crushing angle of the crushing head (2), and the steering mechanism (3) is located on the top of the crushing cylinder (1). The steering mechanism (3) includes a base (31), an axial support frame (32), a radial support frame (33), and a docking rod (34). The axial support frame (32) is rotatably connected to the base (31). One end of the radial support frame (33) is rotatably connected to one side of the axial support frame (32). The docking rod (34) is rotatably connected to one end of the radial support frame (33) away from the axial support frame (32), and the crushing cylinder (1) is fixed on the docking rod (34). A drive mechanism (4) is used to drive the components of the steering mechanism (3), and the drive mechanism (4) is mounted on the base (31); A support mechanism (5) is provided to support the drive mechanism (4), and the support mechanism (5) is located on the drive mechanism (4) on a side away from the steering mechanism (3).

2. A right-angle hydraulic breaker according to claim 1, characterized in that, The steering mechanism (3) further includes a first transmission rod (35), a second transmission rod (36), a first driving bevel gear (37), and a first driven bevel gear (38). The first transmission rod (35) is rotatably connected to the center of the base (31), and one end of the first transmission rod (35) is fixed to the center of the axial support frame (32). The second transmission rod (36) is coaxially rotatably connected to the axis of the first transmission rod (35) and passes through the axial support frame (32). The first driving bevel gear (37) is coaxially fixed to one end of the second transmission rod (36) near the axial support frame (32). The first driven bevel gear (38) is coaxially fixed to the connection end of the radial support frame (33) with the axial support frame (32), and the first driving bevel gear (37) and the first driven bevel gear (38) mesh with each other.

3. A right-angle hydraulic breaker according to claim 2, characterized in that, The steering mechanism (3) further includes a third transmission rod (39), a second driving bevel gear (310), a linkage bevel gear (311), and a second driven bevel gear (312). The third transmission rod (39) is coaxially rotatably connected to the axis of the second transmission rod (36) and passes through the first driving bevel gear (37). The second driving bevel gear (310) is coaxially fixed on the third transmission rod (39) at one end close to the first driving bevel gear (37). The linkage bevel gear (311) is rotatably connected on the axial support frame (32) at one end away from the first driven bevel gear (38). The second driven bevel gear (312) is coaxially fixed on the docking rod (34) at one end away from the crushing cylinder (1), and the linkage bevel gear (311) meshes between the second driving bevel gear (310) and the second driven bevel gear (312).

4. A right-angle hydraulic breaker according to claim 3, characterized in that, The drive mechanism (4) includes a first transmission gear (41), a second transmission gear (42) and a third transmission gear (43). The first transmission gear (41) is coaxially fixed on the first transmission rod (35), the second transmission gear (42) is coaxially fixed on the second transmission rod (36), and the third transmission gear (43) is coaxially fixed on the third transmission rod (39).

5. A right-angle hydraulic breaker according to claim 4, characterized in that, The drive mechanism (4) further includes a limiting seat (44), a sliding groove (45) and a rack (46). The limiting seat (44) is fixed on the base (31). The sliding groove (45) is recessed on the limiting seat (44). The rack (46) is slidably engaged in the sliding groove (45). Multiple sliding grooves (45) and racks (46) are provided, and they are corresponding one-to-one with the first transmission gear (41), the second transmission gear (42) and the third transmission gear (43).

6. A right-angle hydraulic breaker according to claim 5, characterized in that, The drive mechanism (4) further includes an adjusting rod (47) and an adjusting cylinder (48). The adjusting rod (47) is fixed to one end of the rack (46), the fixing part of the adjusting cylinder (48) is fixed to the limiting seat (44), and the telescopic part of the adjusting cylinder (48) is connected to one end of the adjusting rod (47) away from the rack (46).

7. A right-angle hydraulic breaker according to claim 1, characterized in that, The support mechanism (5) includes a support seat (51) and a main cylinder (52). The support seat (51) is fixed on an external fixed structure. The fixed part of the main cylinder (52) is fixed at the center of the support seat (51), and the telescopic part of the main cylinder (52) is fixed on the base (31).

8. A right-angle hydraulic breaker according to claim 7, characterized in that, The support mechanism (5) further includes a positioning plate (53) and a guide rod (54). The positioning plate (53) is fixed on the side wall of the base (31), and the guide rod (54) is fixed on the support (51). A through hole is provided through the positioning plate (53), and the guide rod (54) is slidably engaged in the through hole of the positioning plate (53).

9. A right-angle hydraulic breaker according to claim 8, characterized in that, A positioning disc (55) is coaxially fixed at one end of the guide rod (54) away from the support seat (51), and the diameter of the positioning disc (55) is larger than the through hole of the positioning plate (53).

10. A right-angle hydraulic breaker according to claim 5, characterized in that, The slide groove (45) has a trapezoidal cross-section, and a trapezoidal cross-section protrusion is provided on the rack (46). The protrusion of the rack (46) cooperates with the slide groove (45).