A portable electromechanical product hand-electric switching system

Abstract

The present invention discloses a portable electromechanical product manual-electric switching system, which includes a handwheel cavity, an internal transmission member, a handwheel shaft, an electromagnet, and a limiting rod; the internal transmission member is arranged in the handwheel cavity; one end of the handwheel shaft extends into the handwheel cavity movably; the limiting rod is arranged in the handwheel cavity movably along the vertical direction, and the electromagnet is fixedly arranged above the limiting rod; a limiting elastic device is arranged between the electromagnet and the limiting rod; a limiting structure is arranged at one end of the handwheel shaft near the internal transmission member; a reset elastic device is arranged between the handwheel shaft and the handwheel cavity; when the switching system is in the manual state, the limiting rod is locked in the limiting structure, and one end of the handwheel shaft extending into the handwheel cavity is engaged with the internal transmission member; when the switching system is in the electric state, the electromagnet is energized to adsorb the limiting rod, the limiting rod disengages from the limiting structure of the handwheel shaft, and the handwheel shaft disengages from the internal transmission member. The present invention realizes multiple functions such as convenient switching to the manual state, automatic cutting off of the manual state when in the electric state, and restoration of the non-manual initial state when in the manual state.

Description

Technical Field

[0001] The present invention relates to a portable hand - electric switching system for electromechanical products. Background Art

[0002] The hand - electric switching system is an important part of electromechanical products. In the manual state, the hand - electric switching clutch device is in the engaged state. In the electric state, the hand - electric switching clutch device is in the disengaged state. For some products, it is also required that the hand - electric switching clutch device is in the disengaged state under non - electric conditions. Currently, the common methods for hand - electric switching on the market mainly include "external handle for clutch switching", "handwheel shaft pushed in for electromagnetic induction clutch", "button for clutch switching", and "handwheel shaft pushed in and electrically pushed back for clutch". The "external handle for clutch switching" has an unsightly appearance. For the "handwheel pushed in for electromagnetic induction clutch", when manually operating the actuator, in order to ensure the reliable rebound of the handwheel shaft, the spring force cannot be too small, and a relatively large spring force needs to be overcome all the time during operation to push the handwheel, resulting in poor operability. The "button for clutch switching" has a complex structure, many parts, and poor process consistency. The "handwheel shaft pushed in and electrically pushed back for clutch" has emerged, but it has a complex structure, high assembly difficulty, high cost, and cannot achieve the function of switching the handwheel shaft to the initial state under non - electric conditions. Summary of the Invention

[0003] The purpose of the present invention is to solve the defects existing in the prior art and provide a new hand - electric switching system and structure for electromechanical products.

[0004] To achieve the above - mentioned purpose, the technical solution of the present invention is as follows:

[0005] A portable hand - electric switching system for electromechanical products, comprising a handwheel cavity, an internal transmission member, a handwheel shaft, an electromagnet, and a limiting rod. The internal transmission member is arranged in the handwheel cavity. One end of the handwheel shaft extends axially and movably into the handwheel cavity. The limiting rod is arranged in the handwheel cavity movably in the vertical direction, and the electromagnet is fixedly arranged above the limiting rod. A limiting elastic device is arranged between the electromagnet and the limiting rod, and the limiting elastic device is always in a compressed state and has a downward thrust on the limiting rod. A limiting structure is arranged at one end of the handwheel shaft near the internal transmission member. A reset elastic device is arranged between the handwheel shaft and the handwheel cavity, and the reset elastic device is always in a compressed state and has a thrust on the handwheel shaft in the direction away from the internal transmission member. When the switching system is in the manual state, the limiting rod is locked to the limiting structure of the handwheel shaft, and the end face of the handwheel shaft extending into the handwheel cavity is engaged with the internal transmission member. When the switching system is in the electric state, the electromagnet is energized to adsorb the limiting rod, the limiting rod disengages from the limiting structure of the handwheel shaft, and the handwheel shaft disengages from the internal transmission member.

[0006] The present invention proposes a new handwheel switching structure. By simply pushing the handwheel shaft, the engagement between the handwheel shaft and the internal transmission component can be utilized to enter the manual state. At the same time, by locking the limiting rod using the limiting structure, it can be automatically maintained in the manual state, and the operator can rotate the handwheel shaft to perform operations. When switching to the electric state, when the electric control system receives an instruction, it emits an electric control signal, the electromagnet is energized, driving the limiting rod to act. After the handwheel shaft is disengaged from the internal transmission component, the motor is started, and it can be automatically switched to the electric state. In the electric state, the handwheel shaft does not rotate along with it, realizing a seamless switching from manual to electric state.

[0007] A limiting end face is provided on the inner side of the handwheel cavity. The limiting rod is in close contact with the limiting end face near the center of the handwheel cavity when the electromagnet is not energized.

[0008] Furthermore, a resistance feedback elastic device is provided at one end of the internal transmission component near the handwheel shaft; when the switching system is in the manual state, the handwheel shaft is in contact with the resistance feedback elastic device.

[0009] The resistance of the handwheel shaft is feedback by the resistance feedback elastic device: when the handwheel shaft approaches the end face of the internal transmission component, the resistance suddenly increases and it no longer advances forward. At this time, manual operation can be performed.

[0010] Furthermore, the limiting structure of the handwheel shaft is a groove provided on the circumferential side of the handwheel shaft; the lower end face of the limiting rod has a limiting inclined surface and forms a limiting angle at the front end; when the handwheel shaft is pushed forward, the front end of the handwheel shaft moves forward along the inclined surface of the limiting rod until the limiting angle is caught in the groove. At this time, the front end of the handwheel shaft is engaged with the internal transmission component, and the switching system is in the manual state.

[0011] Furthermore, a shaft sleeve is provided between the handwheel shaft and the handwheel cavity, and an annular groove is provided on the inner side of the shaft sleeve; a cylindrical pin is provided on the handwheel shaft at the position of the annular groove in the vertical direction.

[0012] In the manual state, only need to continue to push the handwheel shaft forward, drive the shaft sleeve to move towards the internal transmission component using the cylindrical pin. The shaft sleeve contacts the inclined surface of the limiting rod, and the component force perpendicular to the axis jacks up the limiting rod. When the limiting rod moves to disengage from the groove of the handwheel shaft, the handwheel shaft moves away from the internal transmission component under the combined action of the resistance feedback elastic device and the reset elastic device, disengaging from the engagement with the internal transmission component. At this time, release the pressure on the handwheel shaft and switch to the initial state, thus avoiding changes in the relative position of the internal transmission of the equipment caused by accidentally operating the handwheel shaft or accidental impact, etc.

[0013] The present invention comprehensively integrates the three switching requirements of the initial state, manual state, and electric state, with good human-computer interaction experience, comprehensive functions, reliable structure, and low cost at the same time.

[0014] Furthermore, the diameter of the annular groove is greater than the length of the cylindrical pin, enabling the cylindrical pin to rotate freely within the annular groove when the handwheel shaft is rotated. Also, the width of the annular groove is greater than twice the diameter of the cylindrical pin, allowing for a certain amount of free travel of the handwheel shaft relative to the bushing.

[0015] Furthermore, O-ring seals are provided on both sides of the bushing, enabling it to have a certain frictional force with the inner side of the handwheel cavity while being able to move axially along the handwheel cavity. A handwheel cover is provided at the rear end of the handwheel cavity to prevent the handwheel shaft from being ejected.

[0016] Among them, the limiting elastic device, the reset elastic device, and the resistance feedback elastic device all use springs.

[0017] One end of the internal transmission part is provided with a spline or external hexagon structure that meshes with the handwheel shaft.

[0018] The limiting rod is made of cast iron or carbon steel.

[0019] The present invention has the following advantages compared with the prior art:

[0020] 1) The hand-electric switching structure of the present invention realizes multiple functions such as convenient switching between manual states, automatic cutting off of the manual state during electric operation, and manual restoration to the non-manual initial state. Compared with the existing external handle switching, the structure is more compact and aesthetically pleasing, and safer. Compared with the existing electromagnetic induction switching, it can automatically maintain the manual position, with simple and labor-saving operation. Compared with the electric automatic retraction switching, it still retains the function of manually disconnecting the manual operation state by personnel, making it easier to ensure the anti-interference ability of the product transmission system in the power-off state.

[0021] 2) The structural solution of the present invention is reliable. The parts used are all common standard parts or easily machined parts, with lower costs compared to other solutions and high feasibility.

[0022] 3) The hand-electric switching device of the present invention is separated from the internal transmission system by a skeleton oil seal. The hand-electric switching device, as an independent cavity, can be sealed at each external interface using a sealing ring or a skeleton oil seal, achieving high protection for the entire machine equipment. Description of the Drawings

[0023] Figure 1 is the logic flow chart of the present invention;

[0024] Figure 2 is the schematic diagram of the initial state structure;

[0025] Figure 3 is to push the handwheel shaft into the manual operation state;

[0026] Figure 4 is the state when the electromagnet adsorbs the limiting rod during electric operation;

[0027] Figure 5 When it is in the electric operation mode, the handwheel shaft is in the retracted state;

[0028] Figure 6 The bushing pushes open the limit rod, and the handwheel shaft is about to retract to the initial state.

[0029] Wherein:

[0030] 1 - Internal transmission part, 2 - Spring, 3 - Spring, 4 - Electromagnet, 5 - Limit rod, 6 - O-ring, 7 - Handwheel shaft, 8 - Cylindrical pin, 9 - Bushing, 10 - Handwheel cavity, 11 - Spring, 12 - Handwheel cover. Specific embodiments

[0031] The present invention will be described in detail below with reference to the accompanying drawings.

[0032] As Figure 2-6 shown, the hand-electric switching system of the electromechanical product of the present invention includes an internal transmission part 1, a spring 2 (i.e., a resistance feedback elastic device), a spring 3 (i.e., a limit elastic device), an electromagnet 4, a limit rod 5, an O-ring 6, a handwheel shaft 7, a cylindrical pin 8, a bushing 9, a handwheel cavity 10, a spring 11 (i.e., a reset elastic device), and a handwheel cover 12.

[0033] The internal transmission part 1 is arranged inside the handwheel cavity 10. One end of it has a structure such as an external spline or external hexagon for meshing with the handwheel shaft. At the same time, a spring 2 is fixed to the end face for feedback the force of limiting the handwheel shaft 7.

[0034] The electromagnet 4 is fixed at a position perpendicular to the axis of the handwheel cavity 10. The limit rod 5 is coaxial with the electromagnet 4 and can move along its axial position. There is a spring 3 between the electromagnet 4 and the limit rod 5 for ensuring that the limit rod 5 is close to the limit end face near the center of the handwheel cavity 10 in the state where the electromagnet 4 is not energized.

[0035] The material of the limit rod 5 is a material that can be adsorbed by the electromagnet, such as cast iron or carbon steel; the suction force generated after the electromagnet 4 is energized can make the limit rod 5 move towards the electromagnet direction against the elastic force of the spring 3.

[0036] On the handwheel shaft 7, there is a structure such as an internal spline or internal hexagon near the internal transmission part for meshing with the internal transmission part; there is a spring 11 between the handwheel shaft 7 and the handwheel cavity 10, so that the handwheel shaft is always subjected to a force away from the internal transmission part.

[0037] A handwheel cover 12 is installed at the port of the handwheel cavity 10 to press the handwheel shaft for restricting the handwheel shaft 7 from being ejected.

[0038] On one side of the handwheel shaft 7 close to the internal transmission part, there is a groove for limiting, and a cylindrical pin 8 is axially installed. A bushing 9 is sleeved on the handwheel shaft 7. A ring groove is provided on the inner side of the bushing 9, and the cylindrical pin 8 is located in the ring groove. The outer diameter of the bushing 9 is slightly smaller than the inner diameter of the handwheel cavity 10, and the inner diameter is larger than the outer diameter of the handwheel shaft 7 but smaller than the length of the cylindrical pin 8. The inner and outer cylindrical surfaces of the handwheel shaft 7 and the bushing 9 do not contact. The diameter of the ring groove on the inner side of the bushing 9 is larger than the length of the cylindrical pin 8, so that the cylindrical pin 8 can rotate freely in the ring groove, and its width is larger than twice the diameter of the cylindrical pin 8, so that the handwheel shaft 7 has a certain dead zone relative to the bushing 9. At the same time, there is a through hole axially in the ring groove of the bushing 9, and the diameter of the through hole is larger than the diameter of the cylindrical pin 8 for installing the cylindrical pin 8.

[0039] Two O-ring seals 6 are installed on the outer side of the bushing 9 and installed on the inner side of the handwheel cavity 10, so that it can have a certain frictional force with the inner side of the handwheel cavity 10 and can move along the axial direction of the handwheel cavity 10.

[0040] As Figure 1 shown, the working mode of the hand-electric switching system of the electromechanical product of the present invention is as follows:

[0041] In the position holding state (i.e., in the initial state), the handwheel shaft 7 is in a state of not being engaged with the internal transmission part 1 under the elastic force of the spring 11 and the limiting action of the handwheel cover 12. The limiting rod 5 is in a position close to the center of the handwheel cavity 10 under the elastic force of the spring 3 and the limiting action of the handwheel cavity 10, and the electromagnet 4 is not powered on;

[0042] When it is necessary to switch from the position holding state to the manual state, push the handwheel shaft 7. The front end of the handwheel shaft 7 acts on the inclined surface of the limiting rod 5 through the fillet, and the component force perpendicular to the axis formed overcomes the elastic force of the spring 3 and moves towards the electromagnet direction. When the position of the ring groove of the handwheel shaft 7 exceeds the position of the limiting rod 5, the handwheel shaft 7 enters the meshing state with the internal transmission part 1. The limiting rod 5 is stuck in the groove under the action of the spring 3, so that the handwheel shaft 7 can maintain this position. At the same time, the end face of the handwheel shaft 7 close to the internal transmission part 1 contacts the spring 2, and the resistance feedback of the handwheel shaft 7 suddenly increases at this time and no longer advances forward. At this time, manual operation can be performed;

[0043] When it is necessary to switch from the manual state to the electric state, when an electric action instruction is input, before the motor acts, the electronic control system provides a signal to power on the electromagnet 4 to generate suction force, so that the limiting rod 5 overcomes the elastic force of the spring 3 and moves towards the electromagnet direction, and the limit of the handwheel shaft 7 disappears. Under the action of the spring 11, it returns to the initial state;

[0044] When manually switching to the position holding state, forcefully push the handwheel shaft 7 further forward. At this time, the pin 8 contacts the end face of the inner annular groove of the bushing 9, driving the bushing 9 to move inward toward the internal transmission member 1. The bushing 9 contacts the inclined surface of the limit rod 5, and the component force perpendicular to the axis jacks up the limit rod 5. When the limit rod 5 moves out of the groove of the handwheel shaft 7, the handwheel shaft 7 moves away from the internal transmission member 1 under the action of the spring 2 and the spring 11, disengaging from the internal transmission member 1. At this time, release the pressure on the handwheel shaft 7 to switch to the initial state.

Claims

1. A portable electro-mechanical product manual-electricity switching system, characterized in that, It includes a handwheel cavity, an internal transmission member, a handwheel shaft, an electromagnet, and a limit rod; the internal transmission member is arranged in the handwheel cavity; one end of the handwheel shaft extends into the handwheel cavity axially and movably; the limit rod is arranged in the handwheel cavity movably in the vertical direction, and the electromagnet is fixedly arranged above the limit rod; a limit elastic device is arranged between the electromagnet and the limit rod, and the limit elastic device is always in a compressed state and has a downward thrust on the limit rod; a limit structure is arranged at one end of the handwheel shaft near the internal transmission member; a reset elastic device is arranged between the handwheel shaft and the handwheel cavity, and the reset elastic device is always in a compressed state and has a thrust on the handwheel shaft in the direction away from the internal transmission member; when the switching system is in the manual state, the limit rod is locked to the limit structure of the handwheel shaft, and one end of the handwheel shaft extending into the handwheel cavity is engaged with the internal transmission member; when the switching system is in the electric state, the electromagnet is energized to adsorb the limit rod, the limit rod disengages from the limit structure of the handwheel shaft, and the handwheel shaft disengages from the internal transmission member.

2. The portable electro-mechanical product hand-electric switching system according to claim 1, characterized in that, A limit end face is arranged near the center on the inner side of the handwheel cavity, and the limit rod abuts against the limit end face near the center of the handwheel cavity when the electromagnet is not energized.

3. The portable electromechanical product hand-electric switching system according to claim 2, characterized in that, A resistance feedback elastic device is arranged at one end of the internal transmission member near the handwheel shaft; when the switching system is in the manual state, the handwheel shaft is in contact with the resistance feedback elastic device.

4. The portable electro-mechanical product hand-electric switching system according to claim 3, characterized in that, The limit structure of the handwheel shaft is a groove arranged on the circumferential side of the handwheel shaft; the lower end face of the limit rod has a limit inclined surface and forms a limit angle at the front end; when the handwheel shaft is pushed forward, the front end of the handwheel shaft moves forward along the inclined surface of the limit rod until the limit angle is caught in the groove. At this time, the front end of the handwheel shaft is engaged with the internal transmission member, and the switching system is in the manual state.

5. The portable electromechanical product hand-electric switching system according to claim 4, wherein, A bushing is arranged between the handwheel shaft and the handwheel cavity, and an annular groove is arranged on the inner side of the bushing; a cylindrical pin is arranged on the handwheel shaft at the position of the annular groove in the vertical direction.

6. The portable electro-mechanical product hand-electric switching system according to claim 5, characterized in that, The width of the annular groove is greater than twice the diameter of the cylindrical pin.

7. The portable electro-mechanical product hand-electric switching system according to claim 6, characterized in that, O-ring seals are arranged on both sides of the bushing respectively; a handwheel cover is arranged at the rear end of the handwheel cavity.

8. The portable electromechanical product hand-electric switching system according to claim 7, characterized in that, The limit elastic device, the reset elastic device, and the resistance feedback elastic device all adopt springs.

9. The portable electro-mechanical product hand-electric switching system according to claim 8, wherein, One end of the internal transmission member is provided with a spline or an external hexagonal structure engaged with the handwheel shaft.

10. The portable electro-mechanical product hand-electric switching system according to claim 9, characterized in that, The limit rod is made of cast iron or carbon steel.

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