Cantilever crane speed reducer with cross-shaped connecting shaft structure

Abstract

The utility model discloses a cantilever crane speed reducer with a cross connecting shaft structure, which comprises a motor mounting seat, a planetary gear speed reducer fixedly mounted on the motor mounting seat, an inner gear ring and a rear end cover arranged on the planetary gear speed reducer, an encoder outer shaft penetrating through a main input shaft, an encoder arranged in a hydraulic motor and provided with an encoder inner shaft, and an encoder outer shaft penetrating through the encoder inner shaft. A cross coupling sleeve is connected between the encoder outer shaft and the encoder inner shaft in series, a first linear groove is formed in one end of the cross coupling sleeve, a second linear groove is formed in the other end of the cross coupling sleeve, one end of the encoder outer shaft extends into the first linear groove and is provided with a first side hole, and a first pin shaft is inserted into the first side hole. One end of the encoder inner shaft extends into the second linear groove and is provided with a second side hole, and a second pin shaft is inserted into the second side hole. The arm support speed reducer can be matched with a hydraulic motor, the problem that whether a speed reducer shaft and a motor shaft are concentric or not does not need to be considered, and the arm support speed reducer has the advantages of being accurate, reliable, 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, to an arm reducer with a cross-coupling structure. Background Art

[0002] The rock drilling rig boom is driven by a combination of a hydraulic motor and a boom reducer. In the past, conventional boom reducers and hydraulic motors were usually fastened only with screws, without a positioning device, and had poor coaxiality, which affected the use of the encoder. In order to solve this problem, a boom reducer with a cross-coupling structure was developed through continuous improvement and optimization. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and to provide a boom reducer with a cross-coupling structure, which can cooperate with a hydraulic motor without considering whether the reducer shaft and the motor shaft are concentric, and has the advantages of accuracy and reliability.

[0004] In order to solve the above technical problems, the purpose of the utility model is achieved as follows: the utility model involves a cross-coupling structure arm reducer, including a motor mounting seat, a main input shaft is rotatably connected to the motor mounting seat, one end of the main input shaft is transmission-connected to a hydraulic motor for controlling rotation, the hydraulic motor is fixedly mounted on the motor mounting seat, a planetary gear reducer is also fixedly mounted on the motor mounting seat, the input gear on the planetary gear reducer is transmission-connected to the main input shaft, the planetary gear reducer is provided with a rotating inner gear ring and a rear end cover, the main input shaft is penetrated by an encoder outer shaft for relative rotation, the hydraulic motor is provided with an encoder, the encoder has an encoder inner shaft, the encoder inner shaft and The encoder outer shaft is arranged coaxially, and a cross coupling sleeve is connected in series between the encoder outer shaft and the encoder inner shaft. One end of the cross coupling sleeve is provided with a first straight groove extending in the radial direction, and the other end is provided with a second straight groove extending in the radial direction, and the second straight groove is perpendicular to the first straight groove. One end of the encoder outer shaft extends into the first straight groove and is provided with a first side hole extending in the radial direction, and a first pin arranged in the first straight groove is inserted into the first side hole. One end of the encoder inner shaft extends into the second straight groove and is provided with a second side hole extending in the radial direction, and a second pin arranged in the second straight groove is inserted into the second side hole; the end of the encoder outer shaft not connected to the cross coupling sleeve is connected to the rear end cover.

[0005] The utility model is further configured as follows: an encoder shaft fixing plate buried in the rear end cover is sleeved on the encoder outer shaft, a first pin hole extending in the radial direction is provided on the side of the encoder shaft fixing plate, a second pin hole matching the first pin hole is provided on the encoder outer shaft, and a third pin shaft is inserted in the second pin hole and the first pin hole; a third pin hole extending in the axial direction is provided on the end surface of the encoder shaft fixing plate, a fourth pin hole matching the third pin hole is provided on the rear end cover, and a fourth pin shaft is inserted in the fourth pin hole and the third pin hole.

[0006] The utility model is further configured as follows: the hydraulic motor is an inner curve hydraulic motor.

[0007] In summary, the utility model has the following beneficial effects: the arm reducer with a cross coupling structure involved in the utility model, by designing a special coupling structure to address existing deficiencies, can realize the function of coaxial transmission of rotational speed without increasing the volume of the reducer, and avoids the inability to use the encoder correctly due to poor coaxiality of the arm reducer and the hydraulic motor during installation. The overall function is perfect and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0009] Figure 2 It is a side view structural schematic diagram of the utility model;

[0010] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0011] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure of part B in the middle. DETAILED DESCRIPTION

[0012] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, rather than limiting the patent requirements of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0013] The utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0014] Example 1

[0015] See also Figures 1 to 4As shown in the figure, a boom speed reducer with a cross coupling structure involved in this embodiment includes a motor mounting base 1. A main input shaft 2 is rotatably connected to the motor mounting base 1. One end of the main input shaft is drivingly connected to a hydraulic motor 3 for controlling rotation. 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 main input shaft. An internally toothed ring 41 and a rear end cover 42 for rotation are provided on the planetary gear speed reducer 4. An encoder outer shaft 5 that rotates relative to each other is passed through the main input shaft 2. An encoder is provided inside the hydraulic motor 3. The encoder has an encoder inner shaft 6. The encoder inner shaft 6 and the encoder outer shaft 5 are coaxially arranged. A cross coupling sleeve 7 is connected in series between the encoder outer shaft 5 and the encoder inner shaft 6. One end of the cross coupling sleeve 7 is provided with a first one-way groove 71 extending radially, and the other end is provided with a second one-way groove 72 extending radially. The second one-way groove 72 is perpendicular to the first one-way groove 71. One end of the encoder outer shaft 5 extends into the first one-way groove 71 and is provided with a first side hole 51 extending radially. A first pin shaft 52 provided in the first one-way groove is inserted into the first side hole 51. One end of the encoder inner shaft 6 extends into the second one-way groove 72 and is provided with a second side hole 61 extending radially. A second pin shaft (not shown) provided in the second one-way groove is inserted into the second side hole 61. The end of the encoder outer shaft 5 not connected to the cross coupling sleeve is connected to the rear end cover 42.

[0016] Further, an encoder shaft fixing plate 8 embedded in the rear end cover 42 is sleeved on the encoder outer shaft 5. A first pin hole (not marked) extending radially is provided on the side surface of the encoder shaft fixing plate 8. A second pin hole (not marked) matching the first pin hole is provided on the encoder outer shaft 5. A third pin shaft 9 is inserted into the second pin hole and the first pin hole. A third pin hole (not marked) extending axially is provided on the end surface of the encoder shaft fixing plate 8. A fourth pin hole (not marked) matching the third pin hole is provided on the rear end cover. A fourth pin shaft 10 is inserted into the fourth pin hole and the third pin hole.

[0017] Further, the hydraulic motor 3 is an internal curve hydraulic motor.

[0018] In this embodiment, one end of the cross coupling sleeve 7 is used in cooperation with the first one-way groove 71 by the first pin shaft 52 to realize the linkage between the cross coupling sleeve 7 and the encoder outer shaft 5. The other end of the cross coupling sleeve 7 is used in cooperation with the second one-way groove 72 by the second pin shaft to realize the linkage between the cross coupling sleeve 7 and the encoder inner shaft 6. As a result, during the rotation of the encoder outer shaft 5 following the rear end cover 42, the kinetic energy can be coaxially transmitted to the encoder.

[0019] Among them, through the arrangement of the encoder shaft fixing plate 8 in cooperation with the first pin hole, the second pin hole and the third pin shaft 9, the positioning function between the encoder shaft fixing plate 8 of the buried rear end cover 42 and the encoder outer shaft 5 is achieved. Through the arrangement of the encoder shaft fixing plate 8 in cooperation with the third pin hole, the fourth pin hole and the fourth pin shaft 10, the positioning function between the encoder shaft fixing plate 8 of the buried rear end cover 42 and the rear end cover 42 is achieved.

[0020] The boom speed reducer with a cross coupling structure involved in the present utility model designs a special coupling structure in view of the existing deficiencies, and can realize the function of coaxial speed transmission without additional increase in the volume of the speed reducer, avoiding the incorrect use of the encoder caused by poor coaxiality between the boom speed reducer and the hydraulic motor. The overall function is perfect and the practicability is strong.

[0021] Unless otherwise clearly specified and limited, 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 orientation or positional relationship indicated is based on the actual orientation or positional relationship shown. It 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.

[0022] Unless otherwise clearly specified and limited, in the present utility model, if there are terms such as "arrangement", "connection" and "connection", 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 it 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.

[0023] 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 labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning or limited experiments based on the concept of the present utility model on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A cross-coupling structure arm reducer, comprising a motor mounting seat, a main input shaft is rotatably connected to the motor mounting seat, one end of the main input shaft is drivingly connected to a hydraulic motor for controlling rotation, the hydraulic motor is fixedly mounted on the motor mounting seat, 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 main input shaft, the planetary gear reducer is provided with a rotating inner gear ring and a rear end cover, characterized in that: An encoder outer shaft that rotates relatively is inserted into the main input shaft, an encoder is arranged in the hydraulic motor, and the encoder has an encoder inner shaft. The encoder inner shaft and the encoder outer shaft are coaxially arranged, and a cross coupling sleeve is connected in series between the encoder outer shaft and the encoder inner shaft, one end of the cross coupling sleeve is provided with a first straight groove extending in the radial direction, and the other end is provided with a second straight groove extending in the radial direction, and the second straight groove is perpendicular to the first straight groove. One end of the encoder outer shaft extends into the first straight groove and is provided with a first side hole extending in the radial direction, and a first pin arranged in the first straight groove is inserted into the first side hole, and one end of the encoder inner shaft extends into the second straight groove and is provided with a second side hole extending in the radial direction, and a second pin arranged in the second straight groove is inserted into the second side hole; the end of the encoder outer shaft that is not connected to the cross coupling sleeve is connected to the rear end cover.

2. The arm reducer with a cross-coupling structure according to claim 1, characterized in that: The encoder outer shaft is sleeved with an encoder shaft fixing plate buried in the rear end cover, a first pin hole extending in the radial direction is provided on the side of the encoder shaft fixing plate, a second pin hole matching the first pin hole is provided on the encoder outer shaft, and a third pin shaft is inserted in the second pin hole and the first pin hole; a third pin hole extending in the axial direction is provided on the end surface of the encoder shaft fixing plate, a fourth pin hole matching the third pin hole is provided on the rear end cover, and a fourth pin shaft is inserted in the fourth pin hole and the third pin hole.

3. The arm reducer with a cross-coupling structure according to claim 1 or 2, characterized in that: The hydraulic motor is an inner curve hydraulic motor.

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