Electric cylinder with hand-cranking protection function

Abstract

The utility model relates to the technical field of electric cylinders, in particular to an electric cylinder with a hand-cranking protection function, which comprises a motor. One end of the connecting shaft is connected with the motor, and the other end of the connecting shaft is connected with the executing mechanism; the first hand-cranking transmission part is in transmission connection with the connecting shaft; the hand-cranking sensing assembly is movably arranged above the hand-cranking transmission part; the sensing assembly and the hand-cranking sensing assembly are oppositely arranged, the sensing assembly is in signal connection with the motor, and when the hand-cranking sensing assembly is close to the sensing assembly to enable the sensing assembly to generate a sensing signal, the motor is kept in a braking state. By arranging the hand-cranking sensing assembly and the sensing assembly, the manual operation of the hand-cranking rod and the rotation of the motor cannot be carried out at the same time, and the situation that the motor is accidentally electrified to rotate and drives the hand-cranking rod to quickly rotate together to accidentally injure workers performing hand-cranking operation is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electric cylinders, in particular to an electric cylinder with a hand-crank protection function. Background Art

[0002] During normal operation, the electric cylinder uses the motor as a power source to drive the actuator to work, but in special circumstances, manual cranking is sometimes used as a power source. Because the manual cranking process is generally long and slow, and the transmission mechanism of the manual cranking cannot be disconnected from the output shaft of the motor, when the manual cranking is in progress, if the motor suddenly starts to rotate, because the motor rotation speed is much faster than the manual cranking speed, when the manual cranking structure is driven to rotate at the same time, it is easy to accidentally injure the staff who are performing the manual cranking operation, which poses a great safety hazard. Utility Model Content

[0003] The technical problem to be solved by the utility model is that during the hand-cranking process, the motor is accidentally energized to rotate and drives the hand-cranking structure to rotate rapidly, which may easily injure the staff who are performing the hand-cranking operation.

[0004] To this end, the utility model provides an electric cylinder with a hand-crank protection function. When the hand-crank process is in progress, the hand-crank sensing component approaches the sensor component, causing the sensor component to generate a sensing signal, and the sensor component sends the sensing signal to the control system, which keeps the motor braked through the control system. At this time, the electric cylinder can only be operated by hand-cranking, thereby protecting the staff who are operating the hand-crank; when the hand-cranking is stopped, the hand-crank sensing component moves away from the sensor component, causing the hand-crank sensing component to exceed the sensing range of the sensor component. At this time, the sensor component no longer sends a sensing signal to the control system, and the motor can be powered and rotate normally.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an electric cylinder with a hand-crank protection function, characterized in that: it includes a motor; a connecting shaft, one end of the connecting shaft is connected to the motor, and the other end of the connecting shaft is connected to the actuator; a first hand-crank transmission part, the first hand-crank transmission part is transmission-connected to the connecting shaft; a hand-crank sensing component, the hand-crank sensing component can be movably arranged above the first hand-crank transmission component; a sensor component, the sensor component is arranged opposite to the hand-crank sensing component, the sensor component is connected to the motor signal, and when the hand-crank sensing component is close to the sensor component so that the sensor component generates an induction signal, the motor remains in a braking state.

[0006] The utility model provides an electric cylinder with a hand-crank protection function. When hand-crank operation is required, the hand-crank sensing part is placed close to the sensor assembly, so that the sensor assembly generates a sensing signal to prevent the motor from accidentally being energized and rotating to accidentally injure a worker who is performing hand-crank operation. This is beneficial to protecting the worker who is operating the hand-crank lever.

[0007] Furthermore, the hand-cranked sensing component includes a sensing block, the sensing component includes a sensing element, and the sensing block and the sensing element are arranged opposite to each other.

[0008] Furthermore, the sensing block includes a first sensing part and a second sensing part, the first sensing part is movably arranged above the first hand-cranked transmission part, the second sensing part is arranged opposite to the sensor element, and one end of the first sensing part is fixedly connected to the upper end of the second sensing part.

[0009] Furthermore, the hand-cranked sensing component also includes a hand-cranked seat, the hand-cranked seat is provided with a first through hole, the first hand-cranked transmission member is provided with a hand-cranked connecting port, and the first through hole is located directly above the hand-cranked connecting port.

[0010] Furthermore, the hand crank seat is also provided with a mounting groove, and the first sensing part is slidably connected to the mounting groove.

[0011] Furthermore, the first induction portion is further provided with a second through hole, and when the motor maintains a braking state, the second through hole is coaxial with the first through hole.

[0012] Furthermore, a limiting member is also provided on the hand crank seat, and the limiting member can limit the first sensing part.

[0013] Furthermore, the sensor assembly also includes a sensor element mounting seat, and the sensor element passes through the sensor element mounting seat.

[0014] Furthermore, the sensor assembly also includes a sensor element protection cover, and the sensor element and the sensor element mounting seat are both arranged in the sensor element protection cover.

[0015] Furthermore, a reduction transmission mechanism is provided between the connecting shaft and the actuator.

[0016] The beneficial effect of the utility model is that the sensing block can slide in the mounting groove through the mounting groove, and when the sensing block slides close to the sensor element, the first through hole is exposed to the outside, and the hand crank can be installed at this time, and in this process, the sensor element will sense the sensing block, and the generated sensing signal will brake the motor; by arranging the sensor element mounting seat, the positioning and installation of the sensor element is convenient, so as to accurately adjust the sensing distance between the sensor element and the sensing block, and ensure that when the hand crank is manually operated, the sensor element will sense the sensing block, and generate a sensing signal to brake the motor, so as to ensure that the operator will not encounter safety problems due to sudden rotation of the motor during the operation of the hand crank; the sensor element and the sensor element mounting seat are both arranged in the sensor element protective cover through the sensor element protective cover, so as to prevent the sensor element from being directly affected by external force and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the position when the induction signal is generated in the utility model.

[0019] Figure 2 It is a schematic diagram of the position of the utility model when no induction signal is generated.

[0020] Figure 3 It is a cross-sectional schematic diagram of a hand-cranked induction component of the utility model.

[0021] Figure 4 It is a schematic top view of the overall structure of the utility model.

[0022] In the figure: 1. Motor; 2. Connecting shaft; 3. Actuator; 4. First hand-cranked transmission member; 41. Hand-cranked connection port; 5. Hand-cranked sensing assembly; 51. Sensing block; 511. First sensing part; 5111. Second through hole; 512. Second sensing part; 52. Hand-cranked seat; 521. First through hole; 522. Mounting groove; 523. Limiting member; 6. Sensor assembly; 61. Sensor element; 62. Sensor element mounting seat; 63. Sensor element protective cover; 7. Reduction transmission mechanism; 8. Second hand-cranked transmission member. DETAILED DESCRIPTION

[0023] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0024] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figures 1 to 4 As shown, an electric cylinder with a hand-crank protection function includes a motor 1, a connecting shaft 2, an actuator 3, a first hand-crank transmission member 4, a hand-crank sensing component 5 and a sensor component 6, wherein one end of the connecting shaft 2 is connected to the motor 1, and the other end of the connecting shaft 2 is connected to the actuator 3; the first hand-crank transmission member 4 is in transmission connection with the connecting shaft 2; the hand-crank sensing component 5 is movably arranged above the first hand-crank transmission member 4; the sensor component 6 is arranged opposite to the hand-crank sensing component 5, and the sensor component 6 is connected to the motor 1 signal. When the hand-crank sensing component 5 approaches the sensor component 6 so that the sensor component 6 generates an induction signal, the motor 1 remains in a braking state.

[0027] When manual operation is required, the manual sensing component 5 is placed close to the sensor component 6 so that the sensor component 6 generates a sensing signal to prevent the motor 1 from accidentally being powered on and rotating to injure the worker who is performing the manual operation. This is helpful to protect the worker who is operating the manual crank.

[0028] The electric cylinder of this embodiment further includes: a second hand-cranked transmission member 8, which is sleeved on the connecting shaft 2, and the first hand-cranked transmission member 4 is located above the connecting shaft 2, and the first hand-cranked transmission member 4 is meshed and transmitted with the second hand-cranked transmission member 8. The first hand-cranked transmission member 4 and the second hand-cranked transmission member 8 are, for example, bevel gears, and the staff rotates the first hand-cranked transmission member 4 by operating the hand crank, and the first hand-cranked transmission member 4 meshes and drives the second hand-cranked transmission member 8 to rotate synchronously with the connecting shaft 2.

[0029] The hand-cranked sensing assembly 5 includes a sensing block 51, and the sensor assembly 6 includes a sensor element 61. The sensing block 51 is arranged opposite to the sensor element 61. The sensor element 61 is, for example, a proximity switch. In other embodiments, the sensor element 61 may also be other sensors with a sensing function. The sensing block 51 is arranged opposite to the sensor element 61, which is conducive to the sensing element 61 sensing the moving distance of the sensor element 61. The sensing block 51 includes a first sensing portion 511 and a second sensing portion 512. The first sensing portion 511 is movably arranged above the first hand-cranked transmission member 4, and the second sensing portion 512 is arranged opposite to the sensor element 61. One end of the first sensing portion 511 is fixedly connected to the upper end of the second sensing portion 512. The hand-cranked sensing assembly 5 also includes a hand-cranked seat 52, and the hand-cranked seat 52 is provided with a first through hole 521. The first hand-cranked transmission member 4 is provided with a hand-cranked connection port 41, and the first through hole 521 is located directly above the hand-cranked connection port 41.

[0030] The hand crank passes through the first through hole 521 and is connected to the first hand crank transmission member 4 through the hand crank connection port 41 .

[0031] The hand crank seat 52 is also provided with a mounting groove 522, and the first sensing part 511 is slidably connected to the mounting groove 522. The mounting groove 522 has a guiding effect on the first sensing part 511. When the first sensing part 511 slides in the mounting groove 522, it can drive the second sensing part 512 to move, thereby changing the relative distance between the second sensing part 512 and the sensor element 61. The relative distance between the second sensing part 512 and the sensor element 61 directly determines whether the sensor element 61 generates a sensing signal, and the state of the motor 1 is controlled by the sensing signal.

[0032] The first sensing part 511 is also provided with a second through hole 5111. When the motor 1 is in a braking state, the second through hole 5111 is coaxial with the first through hole 521. At this time, the hand crank passes through the second through hole 5111 and the first through hole 521 and is connected to the first hand crank transmission member 4 through the hand crank connection port 41.

[0033] A limiting member 523 is also provided on the hand crank seat 52, and the limiting member 523 can limit the first sensing portion 511. The limiting member 523 of this embodiment is, for example, a screw, and can also be a pin or other replacement structure with a limiting function. The screw is connected to the hand crank seat 52 through a thread. When the sensing block 51 needs to be moved, the screw is loosened so that the screw and the sensing block 51 are not in contact. When the sensing block does not need to be moved, the screw is tightened so that the end face of the screw is pressed against the side of the first sensing portion 511, thereby positioning the first sensing portion 511.

[0034] The sensor assembly 6 also includes a sensor element mounting seat 62, and the sensor element 61 passes through the sensor element mounting seat 62. The sensor element 61 and the sensor element mounting seat 62 are connected by threads, which is conducive to adjusting the distance between the sensor element 61 and the sensing block 51, thereby improving the accuracy of sensing.

[0035] The sensor assembly 6 also includes a sensor element protection cover 63, in which the sensor element 61 and the sensor element mounting seat 62 are both disposed. The sensor element protection cover 63 prevents the sensor block 51 from directly contacting the sensor element 61 when moving back and forth, which is beneficial to extending the service life of the sensor element 61.

[0036] A reduction transmission mechanism 7 is also provided between the connecting shaft 2 and the actuator 3 .

[0037] Working principle: Figure 2 As shown, when the lower end of the second sensing part 512 abuts against the hand crank seat 52, the limiting member 523 presses against the side of the first sensing part 511 so that the sensing block 51 cannot move, the second through hole 5111 is staggered with the first through hole 521, and the first through hole 521 is blocked by the upper end surface of the first sensing part. At this time, the hand crank cannot be installed, and the distance between the hand crank sensing component 5 and the sensor component 6 exceeds the sensing range. The sensor component 6 will not generate a sensing signal to brake the motor 1. At this time, the actuator 3 can only be operated by rotating the motor 1.

[0038] When it is necessary to manually operate the hand crank to make the actuator 3 work, loosen the screw so that the screw is not in contact with the sensing block 51, and the sensing block 51 can slide along the mounting groove 522. When the second sensing portion 512 moves away from the hand crank seat 52 and approaches the sensor component 6, the distance between the shaking sensing component 5 and the sensor component 6 enters the sensing range, and the sensor component 6 generates a sensing signal to brake the motor 1. When the second through hole 5111 is directly opposite to the first through hole 521, the hand crank can be connected to the hand crank connection port 41 through the second through hole 5111 and the first through hole 521, and the hand crank is manually operated to make the actuator 3 work, thereby avoiding the sudden rotation of the motor 1 during the manual operation of the hand crank, which affects the safety of the operator.

[0039] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electric cylinder with a hand-crank protection function, characterized in that: include Motor (1); A connecting shaft (2), one end of the connecting shaft (2) is connected to the motor (1), and the other end of the connecting shaft (2) is connected to the actuator (3); A first hand-cranked transmission member (4), the first hand-cranked transmission member (4) being in driving connection with the connecting shaft (2); A hand-cranked sensing component (5), wherein the hand-cranked sensing component (5) is movably arranged above the first hand-cranked transmission member (4); A sensor component (6), wherein the sensor component (6) is arranged opposite to the hand-cranked sensing component (5), and the sensor component (6) is connected to the motor (1) by signal. When the hand-cranked sensing component (5) approaches the sensor component (6) so that the sensor component (6) generates a sensing signal, the motor (1) maintains a braking state.

2. The electric cylinder with hand-crank protection function according to claim 1 is characterized in that: The hand-cranked sensing component (5) comprises a sensing block (51), and the sensing component (6) comprises a sensing element (61). The sensing block (51) and the sensing element (61) are arranged opposite to each other.

3. The electric cylinder with hand-crank protection function according to claim 2 is characterized in that: The sensing block (51) comprises a first sensing portion (511) and a second sensing portion (512); the first sensing portion (511) is movably arranged above the first hand-cranked transmission member (4); the second sensing portion (512) is arranged opposite to the sensor element (61); and one end of the first sensing portion (511) is fixedly connected to the upper end of the second sensing portion (512).

4. The electric cylinder with hand-crank protection function according to claim 3 is characterized in that: The hand-cranked sensing component (5) further comprises a hand-cranked seat (52), the hand-cranked seat (52) is provided with a first through hole (521), the first hand-cranked transmission member (4) is provided with a hand-cranked connecting port (41), and the first through hole (521) is located directly above the hand-cranked connecting port (41).

5. The electric cylinder with hand-crank protection function according to claim 4 is characterized in that: The hand-cranked seat (52) is also provided with a mounting groove (522), and the first sensing portion (511) is slidably connected to the mounting groove (522).

6. The electric cylinder with hand-crank protection function according to claim 5 is characterized in that: The first induction portion (511) is further provided with a second through hole (5111); when the motor (1) maintains a braking state, the second through hole (5111) is coaxial with the first through hole (521).

7. The electric cylinder with hand-crank protection function according to claim 6 is characterized in that: A limiting member (523) is also provided on the hand-cranked seat (52), and the limiting member (523) is capable of limiting the position of the first sensing portion (511).

8. The electric cylinder with hand-crank protection function according to claim 7 is characterized in that: The sensor assembly (6) further comprises a sensor element mounting seat (62), and the sensor element (61) passes through the sensor element mounting seat (62).

9. The electric cylinder with hand-crank protection function according to claim 8, characterized in that: The sensor assembly (6) further comprises a sensor element protection cover (63), and the sensor element (61) and the sensor element mounting seat (62) are both arranged in the sensor element protection cover (63).

10. The electric cylinder with hand-crank protection function according to claim 9, characterized in that: A reduction transmission mechanism (7) is also provided between the connecting shaft (2) and the actuator (3).

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