A control handle for a hoist

Abstract

The present invention provides a control handle for a hoist, belonging to the technical field of hoisting devices. It solves the technical problems of the existing control handles such as single transmission. A control handle for a hoist, a gas-electric seat and a gas-electric connector, the gas-electric seat has an installation cavity, the installation cavity is provided with a thrust bearing, a washer and a radial bearing in sequence from bottom to top, the installation cavity is also provided with a gas-electric rotating shaft, the gas-electric rotating shaft passes downward through the radial bearing, the washer and the thrust bearing and is fixedly connected to the control device and rests on the radial bearing, the upper end face of the gas-electric rotating shaft is fixedly connected with a lower conversion plate, the lower end face of the gas-electric connector is fixedly connected with an upper conversion plate, the upper conversion plate and the lower conversion plate are electrically connected, the lower part of the gas-electric connector is sealed and fixedly connected with a connecting pipe, the connecting pipe passes through the upper conversion plate and the lower conversion plate and is sealed and embedded in the gas-electric rotating shaft, the gas-electric connector, the connecting pipe and the gas-electric rotating shaft have a connected ventilation pipeline. The present invention has a small appearance, a large load-bearing capacity and high efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting devices, and in particular relates to a control handle of a lifting machine. Background Art

[0002] The hoist is a large mechanical equipment that transports by changing potential energy. The transportation process is completed by dragging the flexible wire rope and the transported goods up and down by a power machine. A rotating device for a handle of an intelligent hoist in the prior art includes a rotating device arranged on a control device, and connecting the two through a connecting column, and an input plate connected to the control board and an output plate fixed to the upper fixed column are arranged between the connecting column and the upper fixed column, and the rotation of the rotating device is realized by contacting the six conductive coils on the input board with the contact pieces of the six wiring blocks on the output board. However, the rotating main shaft is limited by the size of the inner holes of the input plate and the output plate, resulting in that its outer diameter cannot be enlarged, reducing the load-bearing capacity of the heavy objects that the hoist can bear, and the gravity pressure exerted by the hoist during the process of lifting the heavy objects is applied on the rotating device, causing the contact pieces on the output plate to wear faster, resulting in the failure of the conductive coil, affecting the normal use of the hoist, and the existing hoists are either electric transmission or gas transmission, and the transmission is single. When transporting different types of products, different types of hoists are required to complete the transportation process, which increases the production cost. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a control handle for a gas-electricity transmission integrated hoist with a compact appearance and a large load-bearing capacity.

[0004] The objectives of the present invention can be achieved through the following technical solutions: a control handle of a hoist, comprising a rotating device, a control device, and a handle device, the rotating device comprising an air-electric seat and an air-electric connector, the air-electric seat having an installation cavity, the installation cavity being provided with a thrust bearing, a gasket and a radial bearing in sequence from bottom to top, the installation cavity also being provided with an air-electric rotating shaft, the air-electric rotating shaft downwardly passing through the radial bearing, the gasket and the thrust bearing, being fixedly connected to the control device and abutting against the radial bearing, the upper end face of the air-electric rotating shaft being fixedly connected to a lower conversion plate, the lower end face of the air-electric connector being fixedly connected to an upper conversion plate, the upper conversion plate and the lower conversion plate being electrically connected, the lower part of the air-electric connector being sealed and fixedly connected to a connecting pipe, the connecting pipe passing through the upper conversion plate and the lower conversion plate and being sealed and embedded in the air-electric rotating shaft, the air-electric connector, the connecting pipe and the air-electric rotating shaft having a connected ventilation pipeline.

[0005] The present invention arranges upper and lower adapter plates at the upper end of the pneumatic-electric shaft, so that the pneumatic-electric shaft can be fixedly connected to the control device for carrying heavy objects without passing through the upper and lower adapter plates. Such a structure can increase the outer diameter of the pneumatic-electric shaft, and the corresponding radial bearing and thrust bearing can also be enlarged, so that the shape of the control handle is more compact and the load-bearing capacity is improved. In order to realize the versatility of the control handle, an air vent is opened in the middle of the pneumatic-electric shaft, and the air vent is connected to the external air source through a sealing and rotating connection between a connecting pipe, a pneumatic-electric connector and the pneumatic-electric shaft. The present invention not only keeps the shape of the control handle compact, but also makes it have a better load-bearing capacity. It can also realize pneumatic-electric transmission for carrying different types of heavy objects, thereby reducing costs and improving efficiency.

[0006] Furthermore, the gas-electric shaft comprises a first connection part and a second connection part, the outer diameter of the second connection part is smaller than the outer diameter of the first connection part, the upper end surface of the first connection part is fixedly connected to the lower conversion plate, the lower end surface of the first connection part abuts against the radial bearing, the second connection part passes through the radial bearing, the washer and the thrust bearing and is fixedly connected to the control device, and the outer surface of the second connection part abuts against the inner surface of the radial bearing. The arrangement of the first connection part and the second connection part enables the gas-electric shaft to have a larger diameter for bearing weight.

[0007] Furthermore, a circular ring portion protrudes from the upper end of the connecting tube, and the circular ring portion is fixed in the gas-electric joint through a circular ring gasket, and a sealing member is provided between the outer peripheral wall of the lower end of the connecting tube and the inner peripheral wall of the gas-electric shaft. There are also sealing elements of different types between the circular ring portion and the gas-electric joint, so that the connecting tube can better connect the ventilation pipeline and better transport the airflow.

[0008] Furthermore, the upper end surface of the gas-electric connector is provided with a female connector for electric wires, which is connected to the upper conversion board for electrical signals. The female connector for electric wires is provided on the upper end surface of the gas-electric connector to prevent the electric wires from being entangled when rotating.

[0009] Furthermore, the control device includes a control housing, in which a solenoid valve and a weighing sensor are fixedly arranged, the solenoid valve is communicated with the ventilation pipeline, the second connecting portion passes through the control housing and is fixedly connected with the weighing sensor, and the control housing is against the weighing sensor. By abutting the control housing against the weighing sensor, the inner side surface of the control housing and the upper end surface of the weighing sensor are in flat contact, so that the weighing sensor transmits signals more sensitively. The solenoid valve and the weighing sensor are both electrically connected to the circuit control board set in the control housing.

[0010] Furthermore, a fixing member is also provided in the control housing, and the fixing member includes a first connecting plate and a second connecting plate connected in an L shape, and a T-shaped guide groove is provided on the inner wall of the control housing, and the first connecting plate is adjustably fixedly connected to the T-shaped guide groove through a fastener, and the second connecting plate is fixedly connected to the electromagnetic valve, and the electromagnetic valve is located in the middle of the control housing. The electromagnetic valve can be adjusted to a certain position through the L-shaped connection for better installation of other components.

[0011] Furthermore, the handle device comprises a handle housing fixedly connected to the control housing, the handle housing outer shell is provided with a handle sleeve, a spring 1 and a locking sleeve, a gravity sensor is installed at the lower part of the control housing, the upper end of the handle sleeve is connected to the gravity sensor, and the spring 1 is located between the handle sleeve and the locking sleeve. The gravity sensor is electrically connected to the circuit control board, and the gravity sensor realizes the up and down movement of the heavy object by controlling the up and down movement of the handle sleeve, which is convenient to use.

[0012] Furthermore, a handle connecting sleeve is fixedly connected to the lower part of the handle shell, the handle connecting sleeve is located at the lower part of the locking sleeve, the lower end of the handle connecting sleeve is fixedly connected to an upper chuck seat, the upper chuck seat is fixedly connected to a lower chuck seat, and the lower chuck seat is detachably fixed with a hook rivet.

[0013] Furthermore, the lower chuck seat has a main mounting groove and a secondary mounting groove located in the middle of both sides of the main mounting groove, the length of the secondary mounting groove is smaller than the length of the main mounting groove, the main mounting groove is provided with a push plate, both sides of the push plate protrude with spring fixing blocks toward the secondary mounting groove, the secondary mounting groove is provided with a second spring, one end of the second spring is against the side wall of the secondary mounting groove and the other end is fixedly connected to the spring fixing block, one end of the push plate extends out of the lower chuck seat, the middle part of the lower chuck seat has a through hole, the push plate is provided with a strip hole relative to the through hole, the strip hole is in a shape of larger front and smaller back, the upper end of the hook rivet has a necked cylindrical portion, the necked cylindrical portion is buckled in the strip hole after passing through the through hole. The detachable and fixed hook rivet can be interchangeably used with the suction cup, and is easy to install and disassemble.

[0014] Furthermore, the handle shell is fixedly connected to a handle connecting sleeve at the bottom, the handle connecting sleeve is located at the bottom of the locking sleeve, the handle connecting sleeve and the handle shell are provided with a connecting hole connected, the connecting hole is provided with an air pipe connected to the electromagnetic valve, and the air pipe extends out of the handle connecting sleeve. The air pipe extends out of the handle connecting sleeve and connects to the suction cup, which can be purchased on the market, and different fixing devices can be provided according to different types of suction cups to fix the suction cup and the lower chuck seat.

[0015] Compared with the prior art, the technical effect of the present invention is as follows: by providing a rotating device that is universal for both gas and electricity, the whole machine can be used to lift different types of heavy objects; by providing upper and lower adapter plates at the upper end of the gas-electric shaft, the gas-electric shaft can be fixedly connected to the control device for carrying heavy objects without passing through the upper and lower adapter plates. Such a structure can increase the outer diameter of the gas-electric shaft, and the corresponding radial bearing and thrust bearing can also be enlarged, making the control handle more compact and the load-bearing capacity better. The present invention can make the control handle compact and have better load-bearing capacity, and can also realize gas-electric transmission for carrying different types of heavy objects, thereby reducing costs and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the present invention.

[0017] Figure 2 It is an enlarged view of point A of the present invention.

[0018] Figure 3 It is an exploded view of the rotating device of the present invention.

[0019] Figure 4 It is a stereogram of the present invention.

[0020] Figure 5 It is an exploded view of the chuck device of the present invention.

[0021] Figure number marking: 1, gas-electric seat; 2, gas-electric connector; 3, thrust bearing; 4, gasket; 5, radial bearing; 6, gas-electric shaft; 601, first connection part; 602, second connection part; 7, upper conversion plate; 8, lower conversion plate; 9, connecting pipe; 901, annular part; 10, ventilation pipe; 11, annular gasket; 12, sealing part; 13, female connector for electric wire; 14, control housing; 1401, T-shaped guide groove; 15, solenoid valve; 16, weighing sensor; 17, fixing part; 1701, the first A connecting plate; 1702, a second connecting plate; 18, a handle housing; 19, a handle sleeve; 20, a locking sleeve; 21, a spring one; 22, a gravity sensor; 23, a handle connecting sleeve; 24, an upper chuck seat; 25, a lower chuck seat; 2501, a main mounting groove; 2502, a secondary mounting groove; 2503, a through hole; 26, a hook rivet; 2601, a necked cylindrical portion; 27, a push plate; 2701, a strip hole; 2702, a spring fixing block; 28, a spring two; 29, an air pipe; 30, a mounting hole. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] It should be noted that the descriptions of the present invention regarding directions such as “up”, “down”, “left”, “right”, “top” and “bottom” are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] according to Figures 1 to 5 As shown, a control handle of a hoist includes a rotating device, a control device, and a handle device. The rotating device includes an air-electric seat 1, an air-electric joint 2, a thrust bearing 3, a washer 4, a radial bearing 5, and an air-electric rotating shaft 6. The air-electric seat 1 has an installation cavity, wherein the air-electric seat 1 is provided with a mounting cavity. Figure 1 The position shows that the gas-electric connector 2 is on the top and the gas-electric seat 1 is on the bottom. The thrust bearing 3, the washer 4 and the radial bearing 5 are arranged in the installation cavity from bottom to top. The gas-electric shaft 6 is also arranged in the installation cavity. The gas-electric shaft 6 passes downward through the radial bearing 5, the washer 4 and the thrust bearing 3 and is fixedly connected to the control device and abuts against the radial bearing 5. The radial bearing 5 bears a large radial load, and the thrust bearing 3 bears a large axial load. The upper end face of the gas-electric shaft 6 is fixedly connected to the lower conversion plate 8, and the lower end face of the gas-electric connector 2 is fixedly connected to the upper conversion plate 7. The upper conversion plate 7 and the lower conversion plate 8 are electrically connected. The gas-electric shaft 6 includes a first connection part 601 and a second connection part 602. The outer diameter of the second connection part 602 is smaller than the outer diameter of the first connection part 601. The upper end surface of the first connection part 601 is fixedly connected to the lower conversion plate 8, and the lower end surface of the first connection part 601 abuts against the radial bearing 5. The second connection part 602 passes through the radial bearing 5, the washer 4 and the thrust bearing 3 and is fixedly connected to the control device. The outer surface of the second connection part 602 abuts against the inner surface of the radial bearing 5. The arrangement of the first connection part 601 and the second connection part 602 enables the gas-electric shaft 6 to have a larger diameter for bearing weight. The lower part of the gas-electric connector 2 is sealed and fixedly connected with a connecting pipe 9, which passes through the upper conversion plate 7 and the lower conversion plate 8 and is sealed and embedded in the gas-electric shaft 6. The gas-electric connector 2, the connecting pipe 9 and the middle part of the gas-electric shaft 6 have a connected sealed ventilation pipeline 10. A circular ring portion 901 protrudes from the upper end of the connecting tube 9, and the circular ring portion 901 is fixed in the gas-electric connector 2 through a circular ring gasket 11. A seal 12 is provided between the outer peripheral wall of the lower end of the connecting tube 9 and the inner peripheral wall of the gas-electric shaft 6. There are also different types of sealing elements between the circular ring portion 901 and the gas-electric connector 2. The connecting tube 9 is better connected to the ventilation pipeline 10, so that the airflow is better transported. A female wire connector 13 is provided on the upper end surface of the gas-electric connector 2, and the female wire connector 13 is connected to the upper conversion board 7 for electrical signals. The female wire connector 13 is provided on the upper end surface of the gas-electric connector 2 to prevent the wires from being entangled when rotating.

[0025] The upper and lower adapter plates are arranged at the upper end of the gas-electric shaft 6. The gas-electric shaft 6 can be fixedly connected to the control device for carrying heavy objects without passing through the upper and lower adapter plates. Such a structure can make the outer diameter of the gas-electric shaft 6 larger, and the corresponding radial bearing 5 and thrust bearing 3 can be enlarged, so that the appearance of the control handle is more compact and the load-bearing capacity becomes better; in order to realize the multifunctionality of the control handle, a vent hole is opened in the middle of the gas-electric shaft 6, and the vent hole is connected to the external gas source through the sealing rotation connection of the connecting pipe 9, the gas-electric connector 2 and the gas-electric shaft 6. This rotating device effectively integrates the circuit and the gas path into one, reduces the space for the control handle, and realizes the 360-degree unlimited rotation and transportation of the power medium and the gas medium at the same time, and also makes it have better load-bearing capacity, and can also be used to carry different types of heavy objects, filling the vacancy of the gas-electric integrated control handle on the hoist, realizing cost reduction and efficiency improvement.

[0026] The control device includes a control housing 14, a solenoid valve 15, a weighing sensor 16, and a circuit control board not shown in the figure. The solenoid valve 15 and the weighing sensor 16 are fixedly connected in the control housing 14. The solenoid valve 15 is communicated with the ventilation pipeline 10. The second connecting portion 602 passes through the control housing 14 and is fixedly connected with the weighing sensor 16. The control housing 14 is against the weighing sensor 16. By abutting the control housing 14 against the weighing sensor 16, the inner side surface of the control housing 14 and the upper end surface of the weighing sensor 16 are flatly abutted, so that the weighing sensor 16 transmits signals more sensitively. The solenoid valve 15 and the weighing sensor 16 are both electrically connected to the circuit control board set in the control housing 14.

[0027] A fixing member 17 is also provided in the control housing 14, and the fixing member 17 includes a first connecting plate 1701 and a second connecting plate 1702 connected in an L shape. A T-shaped guide groove 1401 is provided on the inner wall of the control housing 14. The first connecting plate 1701 is adjustably fixedly connected to the T-shaped guide groove 1401 through a fastener, and the second connecting plate 1702 is fixedly connected to the solenoid valve 15, and the solenoid valve 15 is located in the middle of the control housing 14. The solenoid valve 15 can be adjusted to a certain position through the L-shaped connection for better installation of other components.

[0028] The handle device includes a handle control part, a handle connection part and a chuck device part; the handle control part includes a control housing 14, a handle sleeve 19, a spring 21 and a locking sleeve 20; the control housing 14 is fixedly connected to the handle housing 18, and the outer periphery of the handle housing 18 is sleeved with a handle sleeve 19, a spring 21 and a locking sleeve 20, and a gravity sensor 22 is installed at the lower part of the control housing 14, and the upper end of the handle sleeve 19 is connected to the gravity sensor 22, and the spring 21 is located between the handle sleeve 19 and the locking sleeve 20. The gravity sensor 22 is electrically connected to the circuit control board, and the gravity sensor 22 realizes the up and down movement of the heavy object through the up and down movement control of the handle sleeve 19, which is convenient to use.

[0029] The handle connection part includes a handle connection sleeve 23 and corresponding fixing elements; the handle housing 18 is fixedly connected to the handle connection sleeve 23 , and the handle connection sleeve 23 is located at the lower part of the locking sleeve 20 .

[0030] The chuck device part includes an upper chuck seat 24 and a lower chuck seat 25; the lower chuck seat 25 has a main mounting groove 2501 and a secondary mounting groove 2502 located in the middle of both sides of the main mounting groove 2501, the length of the secondary mounting groove 2502 is smaller than the length of the main mounting groove 2501, the main mounting groove 2501 is provided with a push plate 27, both sides of the push plate 27 protrude with spring fixing blocks 2702 toward the secondary mounting groove 2502, the secondary mounting groove 2502 is provided with a spring 28, one end of the spring 28 is against the side wall of the secondary mounting groove 2502 and the other end is fixedly connected to the spring fixing block 2702, one end of the push plate 27 extends out of the lower chuck seat 25, and the middle part of the lower chuck seat 25 has a through hole 2503, and the push plate 27 is provided with a strip hole 2701 relative to the through hole 2503, and the strip hole 2701 is in a shape of larger front and smaller back.

[0031] When the chuck device is equipped with a hook rivet 26, the upper end of the hook rivet 26 has a necked cylindrical portion 2601, and the hole on one side of the strip hole 2701 is large so that the necked cylindrical portion 2601 can pass through, and the hole on the other side is small so that the necked cylindrical portion 2601 passes through the through hole 2503 and then snaps into the strip hole 2701. When the chuck device is equipped with a suction cup, the detachable and fixed hook rivet 26 can be interchangeably used with the suction cup, and installation and disassembly are convenient. That is, the suction cup can be detachably fixed on the lower chuck seat 25, and there is a connecting mounting hole 30 in the handle connecting sleeve 23 and the handle housing 18. An air pipe 29 connected to the solenoid valve 15 is arranged in the mounting hole 30, and the air pipe 29 extends out of the handle connecting sleeve 23 to connect to the suction cup.

[0032] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A control handle of a hoist, comprising a rotating device, a control device, and a handle device, characterized in that: The rotating device comprises an air-electric seat (1) and an air-electric connector (2). The air-electric seat (1) has an installation cavity, in which a thrust bearing (3), a washer (4) and a radial bearing (5) are arranged in sequence from bottom to top. An air-electric rotating shaft (6) is also arranged in the installation cavity. The air-electric rotating shaft (6) passes downward through the radial bearing (5), the washer (4) and the thrust bearing (3) to be fixedly connected to the control device and abuts against the radial bearing (5). The upper end surface of the air-electric rotating shaft (6) is fixedly The gas-electric connector (2) is fixedly connected to a lower conversion plate (8); the lower end surface of the gas-electric connector (2) is fixedly connected to an upper conversion plate (7); the upper conversion plate (7) and the lower conversion plate (8) are electrically connected; the lower part of the gas-electric connector (2) is sealed and fixedly connected to a connecting pipe (9); the connecting pipe (9) passes through the upper conversion plate (7) and the lower conversion plate (8) and is sealed and embedded in the gas-electric rotating shaft (6); the gas-electric connector (2), the connecting pipe (9) and the gas-electric rotating shaft (6) are provided with a communicating ventilation pipeline (10).

2. The control handle of a hoist according to claim 1, characterized in that: The gas-electric rotating shaft (6) comprises a first connecting portion (601) and a second connecting portion (602); the outer diameter of the second connecting portion (602) is smaller than the outer diameter of the first connecting portion (601); the upper end surface of the first connecting portion (601) is fixedly connected to the lower conversion plate (8); the lower end surface of the first connecting portion (601) abuts against the radial bearing (5); the second connecting portion (602) passes through the radial bearing (5), the washer (4) and the thrust bearing (3) to be fixedly connected to the control device; the outer surface of the second connecting portion (602) abuts against the inner surface of the radial bearing (5).

3. The control handle of a hoist according to claim 1, characterized in that: The upper end of the connecting tube (9) is provided with a protruding annular portion (901), the annular portion (901) being fixed in the gas-electric connector (2) via an annular gasket (11), and a sealing member (12) is provided between the outer peripheral wall of the lower end of the connecting tube (9) and the inner peripheral wall of the gas-electric rotating shaft (6).

4. The control handle of a hoist according to claim 2, characterized in that: The upper end surface of the gas-electric connector (2) is provided with a female wire connector (13), and the female wire connector (13) is connected to the upper conversion plate (7) for electrical signal connection.

5. The control handle of a hoist according to claim 2, characterized in that: The control device comprises a control housing (14), wherein a solenoid valve (15) and a weighing sensor (16) are fixedly arranged in the control housing (14), wherein the solenoid valve (15) is connected to the ventilation pipeline (10), and wherein the second connecting portion (602) passes through the control housing (14) and is fixedly connected to the weighing sensor (16), and the control housing (14) is in contact with the weighing sensor (16).

6. The control handle of a hoist according to claim 5, characterized in that: A fixing member (17) is further provided in the control housing (14), the fixing member (17) comprising a first connecting plate (1701) and a second connecting plate (1702) connected in an L-shape, a T-shaped guide groove (1401) is provided on the inner wall of the control housing (14), the first connecting plate (1701) is adjustably fixedly connected to the T-shaped guide groove (1401) via a fastener, the second connecting plate (1702) is fixedly connected to the solenoid valve (15), and the solenoid valve (15) is located in the middle of the control housing (14).

7. The control handle of a hoist according to claim 5, characterized in that: The handle device comprises a handle housing (18) fixedly connected to a control housing (14); the handle housing (18) is provided with a handle sleeve (19), a spring 1 (21) and a locking sleeve (20) on its outer surface; a gravity sensor (22) is mounted on the lower portion of the control housing (14); the upper end of the handle sleeve (19) is connected to the gravity sensor (22); and the spring 1 (21) is located between the handle sleeve (19) and the locking sleeve (20).

8. The control handle of a hoist according to claim 7, characterized in that: The handle housing (18) is fixedly connected to a handle connecting sleeve (23) at its lower portion, the handle connecting sleeve (23) being located at the lower portion of the locking sleeve (20), the handle connecting sleeve (23) being fixedly connected to an upper chuck seat (24) at its lower end portion, the upper chuck seat (24) being fixedly connected to a lower chuck seat (25), and the lower chuck seat (25) being detachably fixed with a hook rivet (26).

9. The control handle of a hoist according to claim 8, characterized in that: The lower chuck seat (25) has a main mounting groove (2501) and auxiliary mounting grooves (2502) located in the middle of both sides of the main mounting groove (2501), the length of the auxiliary mounting groove (2502) is smaller than the length of the main mounting groove (2501), the main mounting groove (2501) is provided with a push plate (27), both sides of the push plate (27) protrude toward the auxiliary mounting groove (2502) with spring fixing blocks (2702), the auxiliary mounting groove (2502) is provided with a second spring (28), one end of the second spring (28) is connected to the auxiliary mounting groove (2501), and the auxiliary mounting groove (2501) is provided with a second spring (28). 2) is fixedly connected to the spring fixing block (2702) against the other end, one end of the push plate (27) extends out of the lower chuck seat (25), the middle part of the lower chuck seat (25) has a through hole (2503), the push plate (27) is provided with a strip hole (2701) opposite to the through hole (2503), the strip hole (2701) is in a shape of being larger at the front and smaller at the back, the upper end of the hook rivet (26) has a necked cylindrical portion (2601), the necked cylindrical portion (2601) is snapped into the strip hole (2701) after passing through the through hole (2503).

10. The control handle of a hoist according to claim 7, characterized in that: A handle connecting sleeve (23) is fixedly connected to the lower part of the handle housing (18), and the handle connecting sleeve (23) is located at the lower part of the locking sleeve (20). A connecting mounting hole (30) is provided in the handle connecting sleeve (23) and the handle housing (18), and an air pipe (29) connected to the solenoid valve (15) is provided in the mounting hole (30), and the air pipe (29) extends out of the handle connecting sleeve (23).

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