Torque limiting type hydraulic coupler connected through hydraulic expansion sleeve structure

Abstract

The utility model relates to a hydraulic coupler, belongs to the field of coal mine machinery, and particularly relates to a torque limiting type hydraulic coupler which is connected through a hydraulic expansion sleeve structure. The motor sleeve and the shaft sleeve which are arranged on the torque-limiting hydraulic coupler are both of a hydraulic expansion sleeve structure, each hydraulic expansion sleeve structure is formed by coaxially welding an inner sleeve and an outer sleeve, the inner sleeve is elastically deformed in the radial direction by means of the pressure of hydraulic oil, and the fit between an inner hole of the inner sleeve and the shaft is converted into interference from clearance; the torque-limiting type hydraulic coupler can be mounted and dismounted more conveniently and quickly, and the torque-limiting type hydraulic coupler is an excellent flexible transmission device.

Description

Technical Field

[0001] The utility model relates to a hydraulic coupler, belonging to the field of coal mine machinery, in particular to a torque-limited hydraulic coupler connected by a hydraulic expansion sleeve structure. Background Art

[0002] With the continuous advancement of coal mining technology and the actual demand for increasing coal production capacity, the large transportation volume or blockage of large coal on the coal mining face is prone to frequent overload. The torque-limited hydraulic coupling has soft start characteristics and overload protection functions, which can effectively mechanically protect the transmission system. It is an indispensable supporting component for coal mining equipment (transfer machine, crusher). The torque-limited hydraulic coupling is installed between the motor and the reducer to transmit power. The motor shaft is inserted into the motor coupling sleeve, and the reducer shaft is inserted into the coupler sleeve. In order to ensure the concentricity of the coupler, the shaft hole is mostly transition fit. Due to manufacturing errors and other reasons, it often makes installation more difficult. Due to installation errors and deformation after bearing, coaxial errors occur between the motor shaft and the reducer shaft. After long-term use, the shaft hole may be rusted or scratched, which increases the difficulty of coupler maintenance and disassembly, seriously affecting the normal production progress of the coal mine. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides a torque-limiting hydraulic coupling connected by a hydraulic expansion sleeve structure, which can make the installation and disassembly of the torque-limiting hydraulic coupling more convenient and quick, effectively save time costs, and improve production efficiency.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a torque-limited hydraulic coupler connected by a hydraulic expansion sleeve structure, including a hydraulic motor sleeve 1, an elastic block 2, a coupling plate 3, a torque-limited hydraulic coupler 4, a hydraulic shaft sleeve 5, a one-way oiling nozzle 6 and a dust cap 7. The motor inner sleeve Ⅰ11 and the motor outer sleeve Ⅱ12 are coaxially welded to form the hydraulic motor sleeve 1, the shaft inner sleeve Ⅰ51 and the shaft outer sleeve Ⅱ52 are coaxially welded to form the hydraulic shaft sleeve 5, and a closed hydraulic annular cavity is formed inside the hydraulic motor sleeve 1 and the hydraulic shaft sleeve 5. The motor outer sleeve Ⅱ12 and the shaft outer sleeve Ⅱ52 are provided with an oiling channel and a one-way oiling nozzle 6 is installed, and the oiling channel is connected to the hydraulic annular cavity.

[0005] The torque-limited hydraulic coupler connected by a hydraulic expansion sleeve structure, the one-way oil injection nozzle 6 is composed of a valve body 61, a steel ball 62, a spring 63 and a plate 64. The valve body 61 is provided with a thread screwed into the motor jacket II 12 and the shaft jacket II 52, and is connected with the oil injection channel. The one-way oil injection nozzle 6 is connected to the dust cap 7 by a thread.

[0006] The beneficial effects of the utility model are as follows: the torque-limiting hydraulic coupler uses a hydraulic expansion sleeve structure, which relies on the pressure of the hydraulic oil to cause the inner sleeve to undergo radial elastic deformation, so that the fit between the inner hole of the inner sleeve and the shaft is converted from a clearance to an interference fit, which can make the installation and disassembly of the torque-limiting hydraulic coupler more convenient and quick, and is an excellent flexible transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The utility model is a schematic diagram of a torque-limiting hydraulic coupler connected by a hydraulic expansion sleeve structure.

[0008] Figure 2 It is a structural schematic diagram of a one-way oiling nozzle of the utility model.

[0009] As shown in the figure, 1. hydraulic motor sleeve, 2. elastic block, 3. connecting plate, 4. torque-limiting hydraulic coupler, 5. hydraulic shaft sleeve, 6. one-way oiling nozzle, 7. dust cap, 11. motor inner sleeve I, 12. motor outer sleeve II, 51. shaft inner sleeve I, 52. shaft outer sleeve II, 61. valve body, 62. steel ball, 63. spring, 64. plate. DETAILED DESCRIPTION

[0010] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation schemes: The utility model is a torque-limiting hydraulic coupler connected by a hydraulic expansion sleeve structure: comprising a hydraulic motor sleeve 1, an elastic block 2, a coupling plate 3, a torque-limiting hydraulic coupler 4, a hydraulic shaft sleeve 5, a one-way oiling nozzle 6 and a dust cap 7. The coupling plate 3 is fixed to the torque-limiting hydraulic coupler 4 by screws.

[0011] The hydraulic motor sleeve 1 is formed by coaxially welding the motor inner sleeve Ⅰ11 and the motor outer sleeve Ⅱ12, and the hydraulic shaft sleeve 5 is formed by coaxially welding the inner sleeve Ⅰ51 and the shaft outer sleeve Ⅱ52. A closed hydraulic annular cavity is formed inside the hydraulic motor sleeve 1 and the hydraulic shaft sleeve 5. An oil injection channel is provided on the motor outer sleeve Ⅱ12 and the shaft outer sleeve Ⅱ52, and a one-way oil injection nozzle 6 is installed. The oil injection channel is connected to the hydraulic annular cavity.

[0012] The steel ball 62 and the spring 63 are placed in the valve body 61, and the plate 64 is welded and sealed to form a one-way oil injection nozzle 6. The valve body 61 is provided with a thread that is screwed into the motor housing Ⅱ12 and the shaft housing Ⅱ52, and is connected to the oil injection channel. The one-way oil injection nozzle 6 allows the hydraulic oil to flow in only one direction, and does not allow reverse flow. The oil can only be drained using special tools when it needs to be disassembled. The one-way oil injection nozzle 6 is connected to the dust cap 7 by a thread, and the dust cap 7 has the function of isolating dust.

[0013] When installing the hydraulic coupler, insert the motor shaft into the hydraulic motor sleeve 1, connect the one-way oil injection nozzle 6 with the high-pressure manual pump oil injection pipe joint, the hydraulic oil pressure pumped out by the high-pressure manual pump is greater than the elastic force of the spring 63, connect the high-pressure manual pump with the oil injection channel, and pump the hydraulic oil into the annular cavity of the hydraulic motor sleeve 1. The outer sleeve and the inner sleeve are squeezed by the pressure of the hydraulic oil in the annular cavity, so that the inner sleeve undergoes radial elastic deformation, and the shaft hole fit between the motor shaft and the hydraulic motor sleeve 1 changes from clearance to interference. Similarly, insert the input shaft of the reducer into the hydraulic shaft sleeve 5, so that the shaft hole fit between the input shaft of the reducer and the hydraulic shaft sleeve 5 changes from clearance to interference. Place the elastic block 2 between the hydraulic motor sleeve 1 and the coupling plate 3, and the torque-limiting coupler is installed.

[0014] It should be understood that the above detailed description of the technical solution of the utility model with the help of preferred embodiments is illustrative rather than restrictive, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A torque-limited hydraulic coupling connected by a hydraulic expansion sleeve structure, characterized in that: The invention comprises a hydraulic motor sleeve (1), an elastic block (2), a coupling plate (3), a torque-limiting hydraulic coupler (4), a hydraulic shaft sleeve (5), a one-way oiling nozzle (6) and a dust cap (7). The motor inner sleeve I (11) and the motor outer sleeve II (12) are coaxially welded to form the hydraulic motor sleeve (1). The shaft inner sleeve I (51) and the shaft outer sleeve II (52) are coaxially welded to form the hydraulic shaft sleeve (5). A closed hydraulic annular cavity is formed inside the hydraulic motor sleeve (1) and the hydraulic shaft sleeve (5). An oiling channel is provided on the motor outer sleeve II (12) and the shaft outer sleeve II (52) and a one-way oiling nozzle (6) is installed. The oiling channel is communicated with the hydraulic annular cavity.

2. A torque-limited hydraulic coupling connected by a hydraulic expansion sleeve structure according to claim 1, characterized in that: The one-way oil injection nozzle (6) is composed of a valve body (61), a steel ball (62), a spring (63) and a plate (64). The valve body (61) is provided with a thread and is screwed into the motor housing II (12) and the shaft housing II (52) to communicate with the oil injection channel. The one-way oil injection nozzle (6) is connected to the dust cap (7) by a thread.

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