Cantilever crane speed reducer with damping structure

Abstract

The utility model discloses a cantilever crane speed reducer with a damping structure, which comprises a motor mounting seat, an input shaft is rotatably connected onto the motor mounting seat, one end of the input shaft is in transmission connection with a hydraulic motor for controlling rotation, the hydraulic motor is fixedly mounted on the motor mounting seat, a planetary gear speed reducer is further fixedly mounted on the motor mounting seat, and the planetary gear speed reducer is fixedly connected with the input shaft. An input gear on the planetary gear speed reducer is in transmission connection with the input shaft, an inner gear ring on the planetary gear speed reducer is provided with a movable friction plate fixing seat which moves in a follow-up mode, the movable friction plate fixing seat is arranged on the periphery of the motor installation seat, and a movable friction plate is arranged on the inner side of the movable friction plate fixing seat. A static friction plate matched with the dynamic friction plate is arranged on the outer side of the motor mounting seat, and the static friction plate is in contact with the dynamic friction plate. The cantilever crane speed reducer can quickly stabilize a movable part at a deflection position after the movable part stops, has the characteristics of small size and safety and reliability in use, and is complete in overall function and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, and more specifically, it relates to a boom speed reducer with a damping structure. Background Technique

[0002] The rotating arm of a rock drilling jumbo is driven by a combination of a hydraulic motor and a boom speed reducer, which has high requirements for the structure, size, load-bearing capacity, flexibility and reliability of the boom movement of the boom speed reducer. Conventional speed reducers in the past could not meet the requirement that the movable part could quickly stop at a stable deflection position. To solve this problem, a boom speed reducer with a damping structure has been developed through continuous improvement and optimization. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art, and to provide a boom speed reducer with a damping structure, which can quickly and stably position the movable part at the deflection position after stopping, and has the characteristics of small volume, safe and reliable use.

[0004] To solve the above technical problems, the purpose of the utility model is realized as follows: A boom speed reducer with a damping structure according to the utility model includes a motor mounting seat, on which an input shaft is rotatably connected. One end of the input shaft is drivingly connected to a hydraulic motor for controlling rotation, and the hydraulic motor is fixedly installed on the motor mounting seat. A planetary gear speed reducer is also fixedly installed on the motor mounting seat. The input gear on the planetary gear speed reducer is drivingly connected to the input shaft. A moving friction plate fixing seat for following movement is provided on the internal gear ring of the planetary gear speed reducer. The moving friction plate fixing seat is arranged outside the motor mounting seat. A moving friction plate is provided inside the moving friction plate fixing seat. A static friction plate matching the moving friction plate is provided outside the motor mounting seat, and the static friction plate is in contact with the moving friction plate.

[0005] The utility model is further arranged as follows: The moving friction plate fixing seat is provided with a first cylindrical pin, the moving friction plates are arranged at intervals on the first cylindrical pin, the motor mounting seat is provided with a second cylindrical pin, and the static friction plates are arranged at intervals on the second cylindrical pin.

[0006] The utility model is further arranged as follows: The moving friction plates and the static friction plates are arranged alternately.

[0007] The utility model is further arranged as follows: An angular contact bearing is provided between the moving friction plate fixing seat and the motor mounting seat.

[0008] The utility model is further arranged as follows: The angular contact bearing is a four-point contact angular contact bearing.

[0009] The utility model is further arranged as follows: The hydraulic motor is an internal curve hydraulic motor.

[0010] In summary, the utility model has the following beneficial effects: The boom speed reducer with a damping structure involved in the utility model designs a special damping structure to address the existing deficiencies. It can achieve the function of quickly stopping the movable part at a stable deflection position without additional increase in the volume of the speed reducer. It has a small overall volume, is safe and reliable in use, has perfect functions, and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 is a schematic side view structure diagram of the utility model;

[0013] Figure 3 is Figure 1 an enlarged schematic diagram of part A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to enable those skilled in the art to better understand the technical solutions of the utility model, the following describes the preferred implementation embodiments of the utility model in conjunction with specific embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the utility model, rather than limiting the patent requirements of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the utility model.

[0015] The following further illustrates the utility model in conjunction with the drawings and preferred embodiments.

[0016] Embodiment 1

[0017] Referring to Figures 1 to 3 as shown, a boom speed reducer with a damping structure involved in this embodiment includes a motor mounting base 1. An input shaft 2 is rotatably connected to the motor mounting base 1. One end of the input shaft 2 is drivingly connected to a hydraulic motor 3 for controlling rotation. The hydraulic motor 3 is an internal curve hydraulic motor. The hydraulic motor 3 is fixedly installed on the motor mounting base 1. A planetary gear speed reducer 4 is also fixedly installed on the motor mounting base 1. The input gear on the planetary gear speed reducer 4 is drivingly connected to the input shaft 2. A moving friction plate fixing seat 5 for following movement is provided on the internal gear ring of the planetary gear speed reducer 4. The moving friction plate fixing seat 5 is arranged on the periphery of the motor mounting base 1. A moving friction plate 6 is provided inside the moving friction plate fixing seat 5. A static friction plate 7 matching the moving friction plate is provided outside the motor mounting base 1. The static friction plate 7 is in contact with the moving friction plate 6.

[0018] Furthermore, a first cylindrical pin 8 is provided on the moving friction plate 6 fixing seat, the moving friction plates 6 are arranged at intervals on the first cylindrical pin 8, a second cylindrical pin 9 is provided on the motor mounting seat 1, and the static friction plates 7 are arranged at intervals on the second cylindrical pin 9; the moving friction plates 6 and the static friction plates 7 are arranged alternately.

[0019] Furthermore, an angular contact bearing 10 is provided between the moving friction plate fixing seat 5 and the motor mounting seat 1; the angular contact bearing 10 is a four-point contact angular contact bearing.

[0020] In this embodiment, the moving friction plates 6 are fixedly installed on the moving friction plate fixing seat 5, the static friction plates 7 are fixedly installed on the motor mounting seat 1, and each pair of the mating moving friction plates 6 and static friction plates 7 are in continuous contact, and the frictional force generated by the relative movement between them continuously provides damping for the boom speed reducer, so as to achieve rapid stabilization at the deflected position after the movable part stops.

[0021] The boom speed reducer with a damping structure involved in the present utility model designs a special damping structure in view of the existing deficiencies, and can realize the function that the movable part quickly stops at the stable deflected position without additional increase in the volume of the speed reducer. The overall volume is small, the use is safe and reliable, the function is perfect, and the practicability is strong.

[0022] Unless otherwise clearly specified and defined, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the actual shown orientation or positional relationship, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present utility model are only used for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood in combination with the embodiments and according to the specific circumstances.

[0023] Unless otherwise clearly specified and defined, in the present utility model, if there are terms such as "set", "connected" and "connected", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0024] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in this technical field based on the concept of the present utility model through logical analysis, reasoning, or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. A boom reducer with a damping structure, comprising a motor mounting seat, an input shaft is rotatably connected to the motor mounting seat, one end of the input shaft is drivingly connected to a hydraulic motor for controlling rotation, and the hydraulic motor is fixedly mounted on the motor mounting seat, characterized in that: A planetary gear reducer is also fixedly mounted on the motor mounting seat, the input gear on the planetary gear reducer is drivingly connected to the input shaft, the inner gear ring on the planetary gear reducer is provided with a dynamic friction plate fixing seat for follow-up, the dynamic friction plate fixing seat is arranged on the periphery of the motor mounting seat, a dynamic friction plate is arranged on the inner side of the dynamic friction plate fixing seat, and a static friction plate matching the dynamic friction plate is arranged on the outer side of the motor mounting seat, and the static friction plate is in contact with the dynamic friction plate.

2. The arm reducer with a damping structure according to claim 1, characterized in that: The dynamic friction plate fixing seat is provided with a first cylindrical pin, and the dynamic friction plate is arranged on the first cylindrical pin at intervals. The motor mounting seat is provided with a second cylindrical pin, and the static friction plate is arranged on the second cylindrical pin at intervals.

3. The arm reducer with a damping structure according to claim 2, characterized in that: The dynamic friction plates and the static friction plates are arranged alternately.

4. The arm reducer with a damping structure according to any one of claims 1 to 3, characterized in that: An angular contact bearing is arranged between the dynamic friction plate fixing seat and the motor mounting seat.

5. The arm reducer with a damping structure according to claim 4, characterized in that: The angular contact bearing is a four-point contact angular contact bearing.

6. The arm reducer with a damping structure according to claim 1, characterized in that: The hydraulic motor is an inner curve hydraulic motor.

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