A hydraulic transmission structure

Abstract

The present invention discloses a hydraulic transmission structure, comprising a power input device and a power output device; wherein the active rotating sleeve of the power input device rotates and squeezes the oil in the input housing, so that the oil enters the output housing through a first oil pipe to push the driven spiral sleeve to rotate, thereby driving the driven shaft to rotate, and at the same time, the oil in the output housing flows back to the input housing through a second oil pipe, so that the oil flows back and forth between the power input device and the power output device for power transmission, and the power of the active shaft is transmitted to the driven shaft, thereby realizing high-precision and stable transmission, and at the same time, the output end of a device such as a manipulator does not need to bear the weight of the entire transmission structure at the same time, but only needs to bear the weight of the power output device, thereby improving the flexibility of the entire device such as the manipulator, and the torque of the power input device can be increased as needed, and the lengths of the first oil pipe and the second oil pipe can be freely set according to usage conditions to realize long-distance transmission.

Description

Technical Field

[0001] The present invention relates to a transmission structure, and more particularly to a hydraulic transmission structure. Background Art

[0002] In the robotics industry, the power output components of the manipulator joints and terminals generally use a combination of RV reducers and servo motors as the output power. The disadvantages are that they are heavy and large in size. For example, the terminal of the manipulator needs to use a power device with a larger output power (the heavier its own weight), and the power consumption of the middle joint power and lower joint power output devices responsible for running this part also increases accordingly, so it has great limitations. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a hydraulic transmission structure.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A hydraulic transmission structure comprises a power input device and a power output device;

[0006] The power input device comprises an input housing with an active oil outlet and an active oil inlet, wherein an active rotating sleeve and a driving shaft connected to a motor are arranged in the input housing; one end of the driving shaft cooperates with the active rotating sleeve; the power output device comprises an output housing with a driven oil outlet and a driven oil inlet, wherein a driven spiral sleeve and a driven shaft connected to a driven member are arranged in the output housing; one end of the driven shaft cooperates with the driven spiral sleeve; the active oil outlet is connected to the driven oil inlet through a first oil pipe, and the active oil inlet is connected to the driven oil outlet through a second oil pipe; when the active shaft drives the active rotating sleeve to rotate, the active rotating sleeve rotates and squeezes the oil in the input housing, so that the oil enters the output housing through the first oil pipe to drive the driven spiral sleeve to rotate, thereby driving the driven shaft to rotate, and at the same time, the oil in the output housing flows back to the input housing through the second oil pipe.

[0007] The present invention is further configured as follows: an active spiral piston rod is arranged on the outer side wall of one end of the active rotating sleeve, and the other end cooperates with the shell hole of the input shell; the input shell is also provided with an active upper spiral oil cylinder connected with the active oil inlet and an active lower spiral oil cylinder connected with the active oil outlet, one end of the active spiral piston rod is placed in the active upper spiral oil cylinder, and the other end is placed in the active lower spiral oil cylinder; when the active rotating sleeve drives the active spiral piston rod to squeeze into the active lower spiral oil cylinder, the oil in the active lower spiral oil cylinder enters the output shell through the first oil pipe.

[0008] The present invention further provides that: a first spiral raceway is arranged on the outer side wall of the active rotating sleeve, a second spiral raceway matched with the first spiral raceway is arranged on the inner side wall of the shell hole, the first spiral raceway is connected to the second spiral raceway through balls, and when the active rotating sleeve rotates, the active rotating sleeve is pushed to move spirally relative to the input shell.

[0009] The present invention further provides: a first linear raceway is arranged on the inner side wall of the active rotating sleeve, a second linear raceway matching with the first linear raceway is arranged on one end of the active shaft, the second linear raceway is connected to the first linear raceway through balls, and the active shaft drives the active rotating sleeve to rotate through the balls.

[0010] The present invention further provides that: the number of the first linear raceway and the number of the second linear raceway are both two or more, and the first linear raceway and the second linear raceway correspond one to one.

[0011] The beneficial effects of the present invention are as follows: when the active shaft drives the active rotating sleeve to rotate, the active rotating sleeve rotates and squeezes the oil in the input housing, so that the oil enters the output housing through the first oil pipe to push the driven spiral sleeve to rotate, thereby driving the driven shaft to rotate. At the same time, the oil in the output housing flows back to the input housing through the second oil pipe, so that the oil flows back and forth between the power input device and the power output device for power transmission, and the power of the active shaft is transmitted to the driven shaft, so as to achieve high-precision and stable transmission. At the same time, the power input device and the power output device are installed separately, that is, the power output device is installed in the middle or end of the manipulator and other equipment, and the power input device is installed at the bottom or other positions of the manipulator and other equipment, so that the output end of the manipulator and other equipment does not need to bear the weight of the entire transmission structure at the same time, but only needs to bear the weight of the power output device, thereby improving the flexibility of the entire manipulator and other equipment, and the torque of the power input device can be increased as needed. Moreover, the lengths of the first oil pipe and the second oil pipe can be freely set according to usage conditions to achieve long-distance transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a hydraulic transmission structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the structure of the power input device after removing the input housing;

[0014] Figure 3 It is a schematic diagram of the structure of the power output device after removing the output housing;

[0015] Figure 4 It is a schematic diagram of the assembly structure of the active spiral piston rod, the active upper spiral oil cylinder and the active lower spiral oil cylinder;

[0016] Figure 5is a schematic diagram of the structure of the input housing;

[0017] Figure 6 It is a structural schematic diagram of an active rotating sleeve;

[0018] Figure 7 It is the structural diagram of the driving shaft.

[0019] Explanation of the accompanying drawings: 1. Power input device; 11. Input housing; 111. Active oil outlet; 112. Active oil inlet; 113. Housing hole; 114. Second spiral raceway; 12. Active rotating sleeve; 121. First linear raceway; 122. First spiral raceway; 13. Active shaft; 131. Second linear raceway; 14. Active spiral piston rod; 15. Active upper spiral cylinder; 16. Active lower spiral cylinder; 2. Power output device; 21. Output housing; 211. Driven oil inlet; 212. Driven oil outlet; 22. Driven spiral sleeve; 23. Driven shaft; 24. Driven spiral piston rod; 25. Driven upper spiral cylinder; 26. Driven lower spiral cylinder; 3. First oil pipe; 4. Second oil pipe. DETAILED DESCRIPTION

[0020] See attached Figures 1 to 7 A hydraulic transmission structure of the present invention is further described in detail.

[0021] from Figure 1 It can be seen that a hydraulic transmission structure includes a power input device 1 and a power output device 2, wherein the power input device 1 and the power output device 2 have the same structure, wherein the power input device 1 includes an input housing 11 with an active oil outlet 111 and an active oil inlet 112, Figure 2 It can be seen that an active rotating sleeve 12 and an active shaft 13 connected to the motor are arranged in the input housing 11; a first linear raceway 121 is arranged on the inner side wall of the active rotating sleeve 12, and a second linear raceway 131 matched with the first linear raceway 121 is arranged at one end of the active shaft 13, the second linear raceway 131 is connected to the first linear raceway 121 through a ball, and the active shaft 13 drives the active rotating sleeve 12 to rotate through the ball, so that the active shaft 13 is matched with the active rotating sleeve 12; wherein the number of the first linear raceway 121 and the second linear raceway 131 are both two or more, and the first linear raceway 121 and the second linear raceway 131 correspond one to one, and the first linear raceway 121 is evenly distributed on the inner side wall of the active rotating sleeve 12, so that the active shaft 13 and the active rotating sleeve 12 are matched more stably and reliably, wherein the first linear raceway 121 is arranged along the axial direction of the active rotating sleeve 12, and the second linear raceway 131 is arranged along the axial direction of the active shaft 13.

[0022] An active spiral piston rod 14 is arranged on the outer side wall of one end of the active rotating sleeve 12, and the other end is matched with the shell hole 113 of the input shell 11; the input shell 11 is also provided with an active upper spiral oil cylinder 15 connected with the active oil inlet 112 and an active lower spiral oil cylinder 16 connected with the active oil outlet 111, one end of the active spiral piston rod 14 is placed in the active upper spiral oil cylinder 15, and the other end is placed in the active lower spiral oil cylinder 16, when the active shaft 13 drives the active rotating sleeve 12 to rotate, the active rotating sleeve 12 drives the active spiral piston rod 14 to rotate and squeeze the oil in the input shell 11, so that the oil flows out from the active oil outlet 111.

[0023] A first spiral raceway 122 is arranged on the outer side wall of the active rotating sleeve 12, and a second spiral raceway 114 is arranged on the inner side wall of the shell hole 113. The first spiral raceway 122 is connected to the second spiral raceway 114 through balls. When the active rotating sleeve 12 rotates, the active rotating sleeve 12 is pushed to move spirally relative to the input shell 11, thereby driving the active spiral piston rod 14 to move spirally, so that the active spiral piston rod 14 can move in the active upper spiral cylinder 15 and the active lower spiral cylinder 16.

[0024] from Figure 3 It can be seen that, similarly, the power output device 2 also includes an output housing 21 with a driven oil outlet 211 and a driven oil inlet 212, and a driven spiral sleeve 22 and a driven shaft 23 connected to the driven member are arranged in the output housing 21; one end of the driven shaft 23 is matched with the driven spiral sleeve 22, and the matching structure of the two is the same as the matching structure of the driving shaft 13 and the driving rotating sleeve 12, which will not be repeated here; a driven spiral piston rod 24 is also arranged at one end of the driven spiral sleeve 22, and the other end is matched with the output housing 21, and the matching structure is the same as the structure of the driving rotating sleeve 12 and the input housing 11, which will not be repeated here.

[0025] The output housing 21 is also provided with a driven upper spiral cylinder 25 connected to the driven oil outlet 212 and a driven lower spiral cylinder 26 connected to the driven oil inlet 211 . One end of the driven spiral piston rod 24 is placed in the driven upper spiral cylinder 25 , and the other end is placed in the driven lower spiral cylinder 26 .

[0026] The active oil outlet 111 is connected to the driven oil inlet 211 through the first oil pipe 3, and the active oil inlet 112 is connected to the driven oil outlet 212 through the second oil pipe 4; when the active shaft 13 drives the active rotating sleeve 12 to rotate, since the second linear raceway 131 is connected to the first linear raceway 121 through the ball, the active shaft 13 drives the active rotating sleeve 12 to rotate through the ball, and the first spiral raceway 122 is also connected to the second spiral raceway 114 through the ball. When the active rotating sleeve 12 rotates, the active rotating sleeve 12 is pushed to move spirally relative to the input housing 11, so that the active rotating sleeve 12 drives the active spiral piston rod 14 to move spirally, so that the active spiral piston rod 14 is squeezed into the active lower spiral oil cylinder 16, so that the oil in the active lower spiral oil cylinder 16 passes through the first linear raceway 131 and the second spiral raceway 114. An oil pipe 3 enters the driven lower spiral cylinder 26 of the output housing 21, pushing the active spiral piston rod 14 to move out of the driven lower spiral cylinder 26, to drive the driven spiral sleeve 22 to move spirally relative to the output housing 21, thereby driving the driven shaft 23 to rotate. At the same time, the oil in the driven upper spiral cylinder 25 of the output housing 21 flows back to the active upper spiral cylinder 15 of the input housing 11 through the second oil pipe 4, so that the oil flows back and forth between the power input device 1 and the power output device 2 for power transmission, and transmits the power of the active shaft 13 to the driven shaft 23, realizing high-precision and stable transmission. At the same time, the power input device 1 and the power output device 2 are installed separately, that is, the power output device 2 is installed in the middle or end of the manipulator and the like, and the power input device 1 is installed at the bottom of the manipulator and the like or other positions. The output end of a device such as a manipulator does not need to bear the weight of the entire transmission structure at the same time, but only needs to bear the weight of the power output device 2, thereby improving the flexibility of the entire manipulator and other equipment, and the torque of the power input device can be increased as needed. Furthermore, the length of the first oil pipe 3 and the second oil pipe 4 can be freely set according to usage conditions to achieve long-distance transmission.

[0027] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic transmission structure, Its characteristics are: Including power input device and power output device The power input device comprises an input housing with an active oil outlet and an active oil inlet, and an active rotating sleeve and an active shaft connected to the motor are arranged in the input housing; one end of the active shaft matches the active rotating sleeve; The power output device comprises an output housing with a driven oil outlet and a driven oil inlet, a driven spiral sleeve and a driven shaft connected to a driven member are arranged in the output housing; one end of the driven shaft is matched with the driven spiral sleeve; The active oil outlet is connected to the driven oil inlet through a first oil pipe, and the active oil inlet is connected to the driven oil outlet through a second oil pipe; When the active shaft drives the active rotating sleeve to rotate, the active rotating sleeve rotates and squeezes the oil in the input housing, so that the oil enters the output housing through the first oil pipe to drive the driven spiral sleeve to rotate, thereby driving the driven shaft to rotate, and at the same time, the oil in the output housing flows back to the input housing through the second oil pipe; An active spiral piston rod is arranged on the outer side wall of one end of the active rotating sleeve, and the other end thereof is matched with the housing hole of the input housing; The input housing is also provided with an active upper spiral oil cylinder connected to the active oil inlet and an active lower spiral oil cylinder connected to the active oil outlet, one end of the active spiral piston rod is placed in the active upper spiral oil cylinder, and the other end is placed in the active lower spiral oil cylinder; A driven spiral piston rod is also arranged at one end of the driven spiral sleeve, and the other end thereof is matched with the output housing; The output housing is also provided with a driven upper spiral oil cylinder connected to the driven oil outlet and a driven lower spiral oil cylinder connected to the driven oil inlet, one end of the driven spiral piston rod is placed in the driven upper spiral oil cylinder, and the other end is placed in the driven lower spiral oil cylinder; When the active rotating sleeve drives the active spiral piston rod to be squeezed into the active lower spiral cylinder, the oil in the active lower spiral cylinder enters the driven lower spiral cylinder of the output housing through the first oil pipe, pushing the driven spiral piston rod to move outside the driven lower spiral cylinder, thereby driving the driven spiral sleeve to move spirally relative to the output housing, thereby driving the driven shaft to rotate.

2. A hydraulic transmission structure according to claim 1, Its characteristics are: A first spiral raceway is arranged on the outer side wall of the active rotating sleeve, and a second spiral raceway matched with the first spiral raceway is arranged on the inner side wall of the shell hole. The first spiral raceway is connected with the second spiral raceway through balls. When the active rotating sleeve rotates, the active rotating sleeve is pushed to move spirally relative to the input shell.

3. A hydraulic transmission structure according to claim 1 or 2, Its characteristics are: A first linear raceway is arranged on the inner side wall of the active rotating sleeve, a second linear raceway matching the first linear raceway is arranged on one end of the active shaft, the second linear raceway is connected to the first linear raceway via balls, and the active shaft drives the active rotating sleeve to rotate via the balls.

4. A hydraulic transmission structure according to claim 3, Its characteristics are: The number of the first linear raceway and the number of the second linear raceway are both two or more, and the first linear raceway and the second linear raceway correspond one to one.

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