Switch assembly for hydraulic transmission device and hydraulic transmission device

Abstract

The present application discloses a switch assembly for a hydraulic transmission device and a hydraulic transmission device, belonging to the field of hydraulic transmission technology. The switch assembly includes a micro switch, a hydraulic reversing valve, and a rotary handle. The micro switch can control the operation of the motor to generate pressure in the hydraulic oil. The hydraulic reversing valve can switch between different oil circuits of the working equipment to provide driving hydraulic oil for different working states of the working equipment. The hydraulic reversing valve and the micro switch are arranged on opposite sides of the rotary handle. When the rotary handle is rotated to different positions, the rotary handle can abut or separate from the hydraulic reversing valve and the micro switch separately or simultaneously to press the hydraulic reversing valve and the micro switch or reset the hydraulic reversing valve and the micro switch, thereby controlling the working state of the working equipment. The switch assembly provided in the present application is provided with a rotary handle, which can simultaneously control the micro switch and the hydraulic reversing valve, simplifying the control operation of switching the working equipment between different working states.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic transmission, and in particular to a switch assembly for a hydraulic transmission device and the hydraulic transmission device. Background Art

[0002] The rotation of the motor in a hydraulic transmission device generates hydraulic oil pressure, which is then fed into different oil circuits of the working equipment to drive the working equipment. The working equipment is equipped with a microswitch and a hydraulic reversing valve. The microswitch is used to control the motor's operation to generate hydraulic pressure, while the hydraulic reversing valve is used to switch between the working equipment's different oil circuits to provide driving hydraulic pressure for different working states of the working equipment. In existing hydraulic transmission devices, when the working equipment needs to switch between different working states, the microswitch and the hydraulic reversing valve must be controlled separately. This operation is cumbersome and prone to misoperation. Therefore, providing a switch assembly that can simultaneously control both the microswitch and the hydraulic reversing valve has become a technical problem that needs to be solved urgently. Summary of the Invention

[0003] The present application provides a switch assembly for a hydraulic transmission device, which can solve the problem of cumbersome control operations for switching working equipment between different working states.

[0004] In order to solve the above technical problems, the present application provides a switch assembly for a hydraulic transmission device, including a microswitch, a hydraulic reversing valve and a rotary handle. The microswitch can control the operation of the motor to generate pressure in the hydraulic oil. The hydraulic reversing valve can switch between different oil circuits of the working equipment to provide driving hydraulic oil for different working states of the working equipment; the hydraulic reversing valve and the microswitch are arranged on opposite sides of the rotary handle. When the rotary handle is rotated to different positions, the rotary handle can be separately or simultaneously abutted or separated from the hydraulic reversing valve and the microswitch to press the hydraulic reversing valve and the microswitch or reset the hydraulic reversing valve and the microswitch, thereby controlling the working state of the working equipment.

[0005] The present application provides a hydraulic transmission device, which includes a drive pump and a working device. The drive pump drives the working device to perform work through hydraulic oil. The drive pump is provided with a switch assembly as described above, and the switch assembly is used to control various working states of the working equipment.

[0006] The switch assembly provided in the present application is provided with a rotating handle. When the rotating handle is rotated to different positions, the rotating handle can abut or separate from the hydraulic reversing valve and the micro switch separately or simultaneously to press the hydraulic reversing valve and the micro switch or reset the hydraulic reversing valve and the micro switch. The micro switch and the hydraulic reversing valve can be controlled at the same time, simplifying the control operation of switching the working equipment between different working states. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 This is a structural diagram of an embodiment of a switch assembly provided by the present application;

[0009] Figure 2 is a structural schematic diagram of another embodiment of the switch assembly provided by the present application;

[0010] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the switch assembly;

[0011] Figure 4 This is a structural diagram of an embodiment of a rotary handle provided by the present application;

[0012] Figure 5 This is a structural diagram of an embodiment of a rotary handle provided by the present application in a first working state;

[0013] Figure 6 This is a structural diagram of an embodiment of the rotary handle provided by the present application when it is in the second working state;

[0014] Figure 7 This is a structural diagram of an embodiment of the rotary handle provided by the present application when it is in the third working state;

[0015] Figure 8 This is a structural diagram of an embodiment of a rotary handle provided by the present application in a fourth working state;

[0016] Figure 9 This is a structural diagram of an embodiment of a base provided by the present application;

[0017] Figure 10 This is a structural diagram of an embodiment of a reset element provided by the present application;

[0018] Figure 11 It is a structural schematic diagram of an embodiment of a hydraulic transmission device provided in this application. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and examples. It is particularly noted that the following examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Similarly, the following examples are only some embodiments of the present invention and are not intended to be all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative effort are intended to fall within the scope of protection of the present invention.

[0020] In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically defined. The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" can explicitly or implicitly include at least one of such features. All directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The terms "including" and "having" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0021] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] This application provides a switch assembly. Figure 1 , Figure 1 Figure 1 is a schematic diagram of the structure of an embodiment of a switch assembly provided herein. The switch assembly 100 for a hydraulic transmission device may include a microswitch 10, a hydraulic reversing valve 20, and a rotary handle 30. The microswitch 10 controls the operation of the motor, which drives the eccentric shaft to push the plunger, generating hydraulic oil pressure. The hydraulic reversing valve 20 switches between different oil circuits of the working device to provide driving hydraulic oil for different operating states of the working device.

[0023] The working equipment can be a double-acting device or a single-acting device, or other hydraulically driven working equipment. Double-acting equipment has an open oil circuit and a closed oil circuit. The hydraulic reversing valve 20 can switch the high-pressure hydraulic oil between the open oil circuit and the closed oil circuit. When the hydraulic reversing valve 20 is pressed, the high-pressure hydraulic oil is connected to the open oil circuit, and the closed oil circuit is connected to the oil tank. The hydraulic oil can flow from the open oil circuit to the closed oil circuit and return to the oil tank, and the hydraulic oil drives the double-acting device to open. When the hydraulic reversing valve 20 is reset, the high-pressure hydraulic oil is connected to the closed oil circuit, and the open oil circuit is connected to the oil tank. The hydraulic oil can flow from the closed oil circuit to the open oil circuit and return to the oil tank, and the hydraulic oil drives the double-acting device to close. For single-acting equipment, the hydraulic reversing valve 20 can disconnect or connect the single-acting device's oil circuit to the oil tank, thereby providing driving hydraulic oil or pressure relief for the single-acting device.

[0024] The hydraulic reversing valve 20 and the micro switch 10 are arranged on opposite sides of the rotating handle 30. When the rotating handle 30 is rotated to different positions, the rotating handle 30 can abut or separate from the hydraulic reversing valve 20 and the micro switch 10 separately or simultaneously to press the hydraulic reversing valve 20 and the micro switch 10 or reset the hydraulic reversing valve 20 and the micro switch 10, thereby controlling the working state of the working equipment.

[0025] The switch assembly 100 provided in the present application is provided with a rotating handle 30. When the rotating handle 30 is rotated to different positions, the rotating handle 30 can abut or separate from the hydraulic reversing valve 20 and the micro switch 10 separately or simultaneously to press the hydraulic reversing valve 20 and the micro switch 10 or reset the hydraulic reversing valve 20 and the micro switch 10. The micro switch 10 and the hydraulic reversing valve 20 can be controlled at the same time, thereby simplifying the control operation of switching the working equipment between different working states.

[0026] See also Figure 2 、 Figure 3 , Figure 2 is a structural diagram of another embodiment of the switch assembly provided by the present application, Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the switch assembly. The switch assembly 100 may also include a base 40, a rotating shaft 50, and a reset member 60. The base 40 is partially accommodated in the rotating handle 30, the rotating shaft 50 is mounted on the base 40, the rotating handle 30 is sleeved outside the rotating shaft 50, and the rotating handle 30 can rotate around the rotating shaft 50. The hydraulic reversing valve 20 and the micro switch 10 are arranged on opposite sides of the base 40. In some embodiments, the rotating shaft 50 is detachably connected to the base 40. The rotating shaft 50 and the base 40 can be processed and manufactured separately and then connected; the rotating shaft 50 can also be integrally processed and formed with the base 40, which is not specifically limited here.

[0027] The reset member 60 is made of an elastic material and is mounted on the base 40. When the rotary handle 30 rotates under the action of torque, the rotary handle 30 drives one end of the reset member 60 to rotate, causing the reset member 60 to elastically deform. When the rotary handle 30 is released, the reset member 60 recovers its deformation and drives the rotary handle 30 to reset.

[0028] Specifically, the rotating handle 30 may include a first side wall 31, such as Figure 3 As shown, the first side wall 31 is sleeved outside the rotating shaft 50, and the first side wall 31 encloses an accommodating cavity 32. The base 40 is partially accommodated in the accommodating cavity 32. When the rotary handle 30 is rotated to different positions, the first side wall 31 can abut or separate from the hydraulic reversing valve 20 and the micro switch 10 separately or simultaneously, thereby controlling the working state of the working equipment.

[0029] The rotary handle 30 may also have a second side wall 33 connected to the end of the first side wall 31 away from the hydraulic reversing valve 20. The second side wall 33 is sleeved outside the rotary shaft 50. The outer surface of the second side wall 33 may have a plurality of ridges 331 spaced longitudinally along the rotary shaft 50 to increase the roughness of the outer surface of the second side wall 33, making it easier for the user to grip and rotate the rotary handle 30.

[0030] See also Figure 4 , Figure 4 The following is a schematic structural diagram of an embodiment of a rotary handle provided by the present application. In one embodiment, a first side wall 31 is provided with a retaining post 311, a first microswitch triggering portion 312, a second microswitch triggering portion 313, and a hydraulic reversing valve triggering portion 314. The first microswitch triggering portion 312 and the hydraulic reversing valve triggering portion 314 are spaced apart on either side of the retaining post 311, and the second microswitch triggering portion 313 is spaced apart between the first microswitch triggering portion 312 and the hydraulic reversing valve triggering portion 314. When viewing the rotary handle 30 from a perspective facing the direction in which the retaining post 311 is positioned, the retaining post 311, the first microswitch triggering portion 312, the second microswitch triggering portion 313, and the hydraulic reversing valve triggering portion 314 can be sequentially arranged in a counterclockwise direction around the periphery of the first side wall 31, or can be sequentially arranged in a clockwise direction around the periphery of the first side wall 31. This is not specifically limited here; the figure uses the counterclockwise arrangement as an example.

[0031] The first microswitch trigger portion 312 or the second microswitch trigger portion 313 can abut against the microswitch 10 to press the microswitch 10. When the rotary handle 30 is rotated so that the microswitch 10 is located between the first microswitch trigger portion 312 and the second microswitch trigger portion 313, the microswitch 10 is separated from the first side wall 31. At this time, the microswitch 10 is reset, the motor stops working, and no hydraulic oil is input to the working device.

[0032] The hydraulic reversing valve triggering part 314 can abut against the hydraulic reversing valve 20 to press the hydraulic reversing valve 20. When the rotary handle 30 is rotated so that the hydraulic reversing valve 20 is located between the hydraulic reversing valve triggering part 314 and the positioning column 311, the hydraulic reversing valve 20 is separated from the first side wall 31, and the hydraulic reversing valve 20 is reset at this time.

[0033] The working state of the working device may include a first working state, a second working state, a third working state, and a fourth working state.

[0034] See also Figure 5 , Figure 5 FIG3 is a schematic diagram of the structure of an embodiment of the rotary handle provided herein in a first working state. When the rotary handle 30 is rotated, the microswitch 10 is positioned between the first microswitch trigger portion 312 and the second microswitch trigger portion 313. Correspondingly, the hydraulic reversing valve 20 is positioned between the hydraulic reversing valve trigger portion 314 and the locking post 311. The microswitch 10 and the hydraulic reversing valve 20 are both separated from the first side wall 31. The working device enters the first working state and stops working.

[0035] See also Figure 6 , Figure 6 The structure diagram of the rotary handle embodiment provided by the present application is in the second working state. The rotary handle 30 in the first working state rotates along the first direction by an angle α1. In one embodiment, α1 can be 20 degrees. Figure 6 For example, when the rotary handle 30 is viewed from a perspective away from the direction in which the locking column 311 is set, the first direction is clockwise. At this time, the microswitch 10 is located between the first microswitch trigger part 312 and the second microswitch trigger part 313. The hydraulic reversing valve trigger part 314 abuts against the hydraulic reversing valve 20, and the hydraulic reversing valve 20 is pressed. The working equipment is in the second working state. For single-acting working equipment, when the hydraulic reversing valve 20 is pressed so that the oil circuit of the single-acting equipment is connected to the oil tank, the hydraulic oil flows back to the oil tank. The second working state can be to relieve pressure on the single-acting equipment. For double-acting working equipment, when the hydraulic reversing valve 20 is pressed so that the high-pressure hydraulic oil is connected to the open oil circuit and the closed oil circuit is connected to the oil tank, but at this time the microswitch 10 is in the reset state, no high-pressure hydraulic oil is output, and the hydraulic oil can flow back from the closed oil circuit to the oil tank. The second working state can be to relieve pressure on the closed oil circuit of the double-acting equipment.

[0036] In some embodiments, the rotation angle α1 of the rotating handle 30 along the first direction when it is switched from the first working state to the second working state may be another angle between 15° and 25°, which is not specifically limited herein.

[0037] See also Figure 7 , Figure 7This is a schematic diagram of the structure of an embodiment of the rotary handle provided by the present application in the third working state. In the second working state, the rotary handle 30 continues to rotate in the first direction through an angle α2. In one embodiment, α2 can be 15 degrees. The first microswitch trigger 312 abuts against the microswitch 10, pressing the microswitch 10. The hydraulic reversing valve trigger 314 abuts against the hydraulic reversing valve 20, pressing the hydraulic reversing valve 20. The working device enters the third working state. For double-acting working devices, pressing the hydraulic reversing valve 20 connects the high-pressure hydraulic oil to the open oil circuit and the closed oil circuit to the oil tank. Hydraulic oil can flow from the open oil circuit to the closed oil circuit and return to the oil tank. The third working state can drive the double-acting device to open.

[0038] In some embodiments, the rotation angle α2 of the rotating handle 30 along the first direction when it is switched from the second working state to the third working state can be other angles between 10 and 20 degrees, which can be selected according to specific needs.

[0039] See also Figure 8 , Figure 8 The present invention provides a structural diagram of a rotary handle embodiment in the fourth working state. The rotary handle 30 in the first working state rotates along the second direction by an angle α3. In one embodiment, α3 can be 30 degrees. Figure 8 For example, when the rotary handle 30 is viewed from a perspective away from the direction in which the locking column 311 is set, the second direction is counterclockwise. At this time, the second microswitch trigger part 313 abuts against the microswitch 10, pressing the microswitch 10. The hydraulic reversing valve 20 is located between the hydraulic reversing valve trigger part 314 and the locking column 311, and the working device is in the fourth working state. For single-acting working equipment, the hydraulic reversing valve 20 is reset to disconnect the oil circuit of the single-acting device from the oil tank. At the same time, the microswitch 10 is pressed, and the pressurized hydraulic oil is continuously input into the single-acting device. The fourth working state can be to drive the single-acting device to work. For double-acting working equipment, the hydraulic reversing valve 20 is reset to connect the high-pressure hydraulic oil to the open oil circuit, and the open oil circuit is connected to the oil tank. The hydraulic oil can flow from the closed oil circuit to the open oil circuit and return to the oil tank. The fourth working state can be to drive the double-acting device to close.

[0040] In some embodiments, the rotation angle α3 of the rotating handle 30 along the second direction when it is switched from the first working state to the fourth working state can be other angles between 25° and 35°, which can be determined according to specific needs.

[0041] In order to facilitate the sliding of the micro switch 10 and the hydraulic reversing valve 20 at the end of the first side wall 31 when the rotary handle 30 is rotated, in one embodiment, the first micro switch triggering portion 312, the second micro switch triggering portion 313 and the hydraulic reversing valve triggering portion 314 are respectively provided with a first slope 3121, a second slope 3131 and a third slope 3141, see Figures 4 to 8 The micro switch 10 can slide along the first slope 3121 and the second slope 3131 to the first micro switch trigger part 312 and the second micro switch trigger part 313 respectively, and the hydraulic reversing valve 20 can slide along the third slope 3141 to the hydraulic reversing valve trigger part 314.

[0042] By setting the first slope 3121, the second slope 3131 and the third slope 3141, the micro switch 10 and the hydraulic reversing valve 20 can smoothly transition when switching between pressing and resetting, and the working equipment can switch between various working states more smoothly.

[0043] In order to facilitate the fixing of the reset member 60, in one embodiment, a fixing column 41 is provided on the base 40, and the reset member 60 is clamped on the fixing column 41. Figure 9 As shown, Figure 9 It is a structural schematic diagram of an embodiment of a base provided in this application.

[0044] Specifically, the reset member 60 may include an annular body 61 and a locking portion 62. Figure 10 As shown, Figure 10 The figure is a schematic structural diagram of an embodiment of a reset member provided in the present application. The latching portions 62 are connected to opposite ends of the annular body 61, which is mounted on the base 40. The latching portions 62 are latched on opposite sides of the fixed column 41 and the latching column 311. When the rotary handle 30 rotates under the action of torque, the latching column 311 drives the latching portion 62 on one side to rotate, while the fixed column 41 prevents the latching portion 62 on the opposite side from rotating, causing the annular body 61 to open. When the rotary handle 30 is released, the annular body 61 resumes its deformation, closes, and drives the latching column 311 to reset, thereby allowing the working device to promptly reset to the first working state after completing its work.

[0045] In order to limit the rotational travel of the rotary handle 30, in one embodiment, a limiting column 315 is provided on the first side wall 31. Figure 4As shown, the limiting post 315 is located between the locking post 311 and the hydraulic reversing valve triggering portion 314. When the locking post 311 drives the locking portion 62 on one side to rotate toward the hydraulic reversing valve triggering portion 314, the locking portion 62 on the opposite side can abut against the limiting post 315, preventing the rotary handle 30 from further rotation. When the locking post 311 drives the locking portion 62 to rotate away from the hydraulic reversing valve triggering portion 314, the locking portion 62 can abut against the first microswitch triggering portion 312, preventing the rotary handle 30 from further rotation, thereby limiting the rotational travel of the rotary handle 30 to a set range.

[0046] This application provides a hydraulic transmission device, please refer to Figure 11 , Figure 11 The diagram is a schematic structural diagram of an embodiment of a hydraulic transmission device provided herein. The hydraulic transmission device 300 includes a drive pump 310 and a working device 320. The drive pump 310 drives the working device 320 to perform work using hydraulic oil. The drive pump 310 is equipped with the aforementioned switch assembly 100, which is used to control various operating states of the working device 320.

[0047] The switch assembly provided in this application has at least the following beneficial effects:

[0048] 1. The switch assembly 100 provided in the present application is provided with a rotary handle 30, which can simultaneously control the micro switch 10 and the hydraulic reversing valve 20, thereby simplifying the control operation of switching the working equipment between different working states.

[0049] 2. By providing the first slope 3121, the second slope 3131 and the third slope 3141, the micro switch 10 and the hydraulic reversing valve 20 can smoothly transition when switching between pressing and resetting, and the working equipment can switch more smoothly between various working states.

[0050] 3. The switch assembly is provided with a reset member 60, which can drive the rotary handle 30 to reset, so that the working equipment can be reset to the first working state in time after completing the work.

[0051] The above descriptions are only some embodiments of the present invention and do not limit the scope of protection of the present invention. Any equivalent device or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A switch assembly for a hydraulic transmission device, characterized in that: include: A micro switch, a hydraulic reversing valve, and a rotary handle. The micro switch can control the motor to generate pressure in the hydraulic oil. The hydraulic reversing valve can switch between different oil circuits of the working equipment to provide driving hydraulic oil for different working states of the working equipment. The hydraulic reversing valve and the micro switch are arranged on opposite sides of the rotary handle. When the rotary handle is rotated to different positions, the rotary handle can abut against or separate from the hydraulic reversing valve and the micro switch respectively or simultaneously, so as to press the hydraulic reversing valve and the micro switch or reset the hydraulic reversing valve and the micro switch, thereby controlling the working state of the working equipment; The rotary handle includes a first side wall, the first side wall is configured to enclose an accommodating cavity, and when the rotary handle is rotated to different positions, the first side wall can abut against or separate from the hydraulic reversing valve and the micro switch separately or simultaneously; The first side wall is provided with a locking column, a first micro switch triggering part, a second micro switch triggering part and a hydraulic reversing valve triggering part; The first micro switch triggering part and the hydraulic reversing valve triggering part are spaced apart on both sides of the locking column, and the second micro switch triggering part is spaced apart between the first micro switch triggering part and the hydraulic reversing valve triggering part; The first micro-switch triggering portion or the second micro-switch triggering portion can abut against the micro-switch to press the micro-switch; when the rotary handle is rotated so that the micro-switch is located between the first micro-switch triggering portion and the second micro-switch triggering portion, the micro-switch is separated from the first side wall; The hydraulic reversing valve triggering portion can abut against the hydraulic reversing valve to press the hydraulic reversing valve. When the rotary handle is rotated so that the hydraulic reversing valve is located between the hydraulic reversing valve triggering portion and the locking column, the hydraulic reversing valve is separated from the first side wall. The rotary handle is further provided with a second side wall, and the second side wall is connected to an end of the first side wall away from the hydraulic reversing valve.

2. The switch assembly according to claim 1, wherein: The working state of the working equipment includes a first working state, a second working state, a third working state and a fourth working state; When the rotary handle is rotated so that the micro switch is located between the first micro switch triggering part and the second micro switch triggering part, and correspondingly, the hydraulic reversing valve is located between the hydraulic reversing valve triggering part and the positioning column, the micro switch and the hydraulic reversing valve are both separated from the first side wall, the working equipment is in the first working state, and the working equipment stops working; In the first working state, the rotary handle is rotated 20 degrees in the first direction, the micro switch is located between the first micro switch trigger part and the second micro switch trigger part, the hydraulic reversing valve trigger part abuts against the hydraulic reversing valve and presses the hydraulic reversing valve, and the working device is in the second working state; The rotary handle in the second working state is further rotated 15 degrees along the first direction, the first microswitch triggering part abuts against the microswitch to press the microswitch, the hydraulic reversing valve triggering part abuts against the hydraulic reversing valve to press the hydraulic reversing valve, and the working device is in the third working state; The rotating handle in the first working state rotates 30 degrees in the second direction, the second microswitch trigger part abuts against the microswitch to press the microswitch, the hydraulic reversing valve is located between the hydraulic reversing valve trigger part and the positioning column, and the working equipment is in the fourth working state.

3. The switch assembly according to claim 1, wherein: The first microswitch triggering part, the second microswitch triggering part and the hydraulic reversing valve triggering part are respectively provided with a first slope surface, a second slope surface and a third slope surface. The microswitch can slide along the first slope surface and the second slope surface to the first microswitch triggering part and the second microswitch triggering part respectively, and the hydraulic reversing valve can slide along the third slope surface to the hydraulic reversing valve triggering part.

4. The switch assembly according to claim 1, wherein: The switch assembly includes a base, a rotating shaft and a reset member; The base is partially accommodated in the accommodating cavity, the rotating shaft is mounted on the base, the rotating handle is sleeved outside the rotating shaft, and the rotating handle can rotate around the rotating shaft, and the hydraulic reversing valve and the micro switch are arranged on opposite sides of the base; The reset member is mounted on the base. When the rotary handle rotates under the action of torque, the rotary handle drives one end of the reset member to rotate, causing the reset member to elastically deform. When the rotary handle is released, the reset member can restore the deformation and drive the rotary handle to reset.

5. The switch assembly according to claim 4, characterized in that A fixing column is provided on the base, and the reset member is clamped on the fixing column.

6. The switch assembly according to claim 5, characterized in that The reset member includes an annular body and a locking portion, the locking portion is connected to opposite ends of the annular body, the annular body is mounted on the base, and the locking portion is locked on opposite sides of the fixing column and the locking column; When the rotating handle rotates under the action of torque, the locking column drives the locking part on one side to rotate, and the fixed column prevents the locking part on the opposite side from rotating, so that the annular body opens; when the rotating handle is released, the annular body resumes its deformation, the annular body closes and drives the locking column to reset.

7. The switch assembly according to claim 1, wherein: A limiting column is provided on the first side wall. The limiting column is located between the positioning column and the triggering portion of the hydraulic reversing valve. The limiting column is used to limit the rotation stroke of the rotating handle.

8. A hydraulic transmission device, characterized in that: include: A driving pump and a working device, wherein the driving pump drives the working device to perform work through hydraulic oil, and the driving pump is provided with a switch assembly as described in any one of claims 1 to 7, and the switch assembly is used to control various working states of the working device.

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