Self-locking traction device

Abstract

The utility model provides a self-locking traction device. The self-locking traction device comprises a motor, an output mechanism and a transmission mechanism, the output mechanism comprises an output bracket and an output sleeve; the transmission mechanism comprises a transmission support, a movable gear ring, a fixed gear ring, a sun gear, a planet support and a planet gear, the transmission support is fixedly connected with the output support, a connecting baffle is arranged at the end of the movable gear ring, a connecting sleeve is arranged in the center of the connecting baffle and extends into the output support, and the output sleeve fixedly sleeves the outer side of the connecting sleeve. The number of teeth of the fixed gear ring is larger than that of teeth of the movable gear ring, a connecting shaft is coaxially arranged at the end of the sun gear, the connecting shaft penetrates through the connecting sleeve and is connected with an output shaft of the motor, the planet gear is rotationally arranged on the side wall, close to the motor, of the planet support, and the planet gear is meshed with the movable gear ring, the fixed gear ring and the sun gear. The planetary gear can achieve self-locking and replace a traditional brake mechanism, so that the traction device has the advantages of being small in size and compact in structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to a traction device, in particular to a self-locking type traction device. BACKGROUND

[0002] At present, the Chinese patent with the announcement number CN210655957U discloses a low-tonnage electric hoist, which comprises a gear box, an intermediate piece and a motor. The motor comprises a stator, a rotor and a motor shaft arranged in the motor shell. A brake assembly connected through splines is sleeved on the motor shaft between the motor and the intermediate piece. The brake assembly comprises a brake base sleeved on the motor shaft, a brake spring sleeved on the motor shaft is arranged in the brake base, a U-shaped annular brake disc is connected to the brake base, and an annular friction plate is arranged on the outer end surface of the annular brake disc. The end surface of the intermediate piece is provided with a friction stop surface matched with the annular brake disc. A large gear meshing with the gear on the motor shaft is arranged in the intermediate piece. Clutch plates are arranged on the two side end surfaces of the large gear. Butterfly washers are attached to the outer surfaces of the clutch plates. The large gear, the clutch plates and the butterfly washers are all sleeved on a chain wheel shaft. The chain wheel shaft is connected to the clutch plates through splines and is gap-matched with the large gear. However, the above-mentioned electric hoist has the defects of large volume and poor running stability due to its complex mechanism. SUMMARY

[0003] Therefore, the utility model aims at providing a self-locking type traction device, which has the advantages of small volume and high running stability.

[0004] In order to solve the above technical problems, the technical scheme of the utility model is as follows: a self-locking type traction device, which comprises a motor, an output mechanism and a transmission mechanism arranged in sequence.

[0005] The output mechanism comprises an output support and an output sleeve. The output support is fixedly connected to the shell of the motor. The output sleeve is rotatably arranged in the output support and coaxially arranged with the output shaft of the motor.

[0006] The transmission mechanism includes a transmission bracket, a movable gear ring, a fixed gear ring, a sun gear, a planetary carrier, and planetary gears. The transmission bracket is fixedly connected to the output bracket. The movable gear ring is rotatably disposed in the transmission bracket. A connecting baffle is provided at the end of the movable gear ring, and a connecting sleeve is provided at the center of the connecting baffle. The connecting sleeve extends into the output bracket and is fixedly sleeved on the outside of the connecting sleeve. The fixed gear ring is fixedly disposed on the inner side of the transmission bracket, located on the side of the movable gear ring away from the motor. The fixed gear ring and... The movable gear ring is coaxially arranged, the fixed gear ring has more teeth than the movable gear ring, the sun gear is rotatably arranged in the transmission bracket, and a connecting shaft is coaxially arranged at the end of the sun gear. The connecting shaft passes through the connecting sleeve and is connected to the output shaft of the motor. The planetary support is rotatably arranged in the transmission bracket, and the planetary support is located on the side of the sun gear away from the motor. The planetary gear is rotatably arranged on the side wall of the planetary support near the motor. The planetary gear meshes with the movable gear ring, the fixed gear ring and the sun gear.

[0007] With the above technical solution, during use, the motor drives the sun gear to rotate via the connecting shaft. The sun gear drives the planetary gears to rotate, and the planetary gears, under the action of the fixed gear ring, drive the planet carrier to revolve around the sun gear. Simultaneously, the planetary gears drive the movable gear ring to rotate, and the movable gear ring, through the connecting sleeve, drives the output sleeve to rotate circumferentially. The output sleeve can then move an object by pulling it with a chain or rope. The transmission mechanism uses a planetary gear set, which can bear higher loads and has higher operational stability. When the motor stops rotating, the object will drive the output sleeve to rotate via the chain or rope, and the output sleeve will drive the movable gear ring to rotate. The movable gear ring will drive the planetary gears to rotate. Because the number of teeth on the movable gear ring is different from that on the fixed gear ring, the planetary gears cannot rotate around the fixed gear ring, thus achieving self-locking and replacing the traditional braking mechanism. This gives the above traction device the advantages of small size and compact structure.

[0008] Preferably, a chain storage bin is provided at the lower end of the output bracket, a sprocket body is fixedly provided on the outer side of the output sleeve, a chain is mounted on the outer side of the sprocket body, one end of the chain extends into the chain storage bin, and a hook is provided at the other end of the chain.

[0009] With the above technical solution, when the output sleeve rotates, it will drive the sprocket body to rotate, and the sprocket body will drive the chain to move, thereby lifting the object through the hook.

[0010] Preferably, a proximity switch is provided at the lower end of the output bracket, and a detection body is provided at the upper end of the hook. When the proximity switch senses the detection body, the proximity switch will turn off the motor.

[0011] Through the technical scheme, when the proximity switch senses the detection body, the proximity switch will turn off the motor, thereby avoiding the situation that the lifting hook hits the top.

[0012] Preferably, the upper end of the lifting hook is provided with a buffer spring, the buffer spring is sleeved outside the chain, the upper end of the buffer spring is provided with a buffer block, the upper end of the buffer block is provided with a mounting groove, and the detection body is embedded in the mounting groove.

[0013] Through the technical scheme, the buffer spring and the buffer block can buffer the upward movement of the lifting hook, which not only avoids the direct impact of the lifting hook on the output support, but also reduces the impact on the electric hoist during the upward movement of the lifting hook.

[0014] Preferably, the inner side of the output support is fixedly provided with a chain wheel cover, the output sleeve is rotatably arranged in the chain wheel cover through a bearing, and the chain wheel body is located on the inner side of the chain wheel cover.

[0015] Through the technical scheme, the chain wheel cover cooperates with the chain wheel body to limit the chain, thereby avoiding the separation of the chain and the chain wheel body.

[0016] Preferably, the outer side of the output sleeve is fixedly provided with a winch rope cylinder, the outer side of the winch rope cylinder is wound with a winch rope, one end of the winch rope is fixedly connected to the outer wall of the winch rope cylinder, and the other end of the winch rope is provided with a traction hook.

[0017] Through the technical scheme, the output sleeve rotates to drive the winch rope cylinder to rotate, the winch rope cylinder can wind the winch rope, and then the traction hook can pull the object. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structure diagram of example one Figure 1 ;

[0019] Figure 2 Structure diagram of example one Figure 2 ;

[0020] Figure 3 Sectional view of example one

[0021] Figure 4 Structure diagram of example two

[0022] Figure 5 Exploded view of example two

[0023] Label: 1, motor; 2, output mechanism; 21, output support; 22, output sleeve; 3, transmission mechanism; 31, transmission support; 32, movable gear ring; 33, fixed gear ring; 34, sun gear; 35, planet support; 36, planet gear; 4, connecting baffle; 5, connecting sleeve; 6, connecting shaft; 7, chain storage barrel; 8, sprocket main body; 9, chain; 10, hook; 11, proximity switch; 12, detection body; 13, buffer spring; 14, buffer block; 15, mounting groove; 16, sprocket cover; 17, capstan rope cylinder; 18, capstan rope; 19, traction hook. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model are further described in detail below in combination with the drawings, so that the technical scheme of the utility model is easier to understand and master.

[0025] Example one: a self-locking type traction device, as shown in the figure, comprising motor 1, output mechanism 2 and transmission mechanism 3 arranged in sequence. Figures 1 to 3

[0026] In this embodiment, the motor 1 is a direct-current brushless motor 1, which has the advantages of small size, reliable operation, etc.

[0027] The output mechanism 2 comprises an output support 21 and an output sleeve 22. The output support 21 is fixedly connected with the shell of the motor 1. The output sleeve 22 is rotatably arranged in the output support 21, and the output sleeve 22 is coaxially arranged with the output shaft of the motor 1. In this embodiment, the inner hole of the output sleeve 22 is a regular hexagon.

[0028] ​The transmission mechanism 3 comprises a transmission support 31, a movable gear ring 32, a fixed gear ring 33, a sun gear 34, a planet support 35 and a planet gear 36. The transmission support 31 is fixedly connected with the output support 21. The movable gear ring 32 is rotatably arranged in the transmission support 31, and an end of the movable gear ring 32 is provided with the connecting baffle 4. The center of the connecting baffle 4 is provided with the connecting sleeve 5, the connecting sleeve 5 extends into the output support 21, and the output sleeve 22 is fixedly sleeved outside the connecting sleeve 5. In the embodiment, the end face of the connecting sleeve 5 is in the shape of a regular hexagon. The fixed gear ring 33 is fixedly arranged inside the transmission support 31, and the fixed gear ring 33 is located on the side of the movable gear ring 32 away from the motor 1. The fixed gear ring 33 is coaxially arranged with the movable gear ring 32, and the number of teeth of the fixed gear ring 33 is greater than that of the movable gear ring 32. The sun gear 34 is rotatably arranged in the transmission support 31, and an end of the sun gear 34 is coaxially provided with the connecting shaft 6. The connecting shaft 6 passes through the connecting sleeve 5 and is connected with the output shaft of the motor 1. The planet support 35 is rotatably arranged in the transmission support 31, and the planet support 35 is located on the side of the sun gear 34 away from the motor 1. The planet gear 36 is rotatably arranged on the side wall of the planet support 35 close to the motor 1, and the planet gear 36 is in mesh with the movable gear ring 32, the fixed gear ring 33 and the sun gear 34. In the embodiment, the planet gear 36 is three, and the three planet gears 36 are equally spaced along the circumference of the sun gear 34.

[0029] The lower end of the output support 21 is provided with a chain storage barrel 7, the outside of the output sleeve 22 is fixedly provided with a chain wheel body 8, the outside of the chain wheel body 8 is arranged with a chain 9, one end of the chain 9 extends into the chain storage barrel 7, and the other end of the chain 9 is provided with a lifting hook 10. The lower end of the output support 21 is provided with a proximity switch 11, and the upper end of the lifting hook 10 is provided with a detection body 12. When the proximity switch 11 senses the detection body 12, the proximity switch 11 will turn off the motor 1. In the embodiment, the proximity switch 11 is a Hall proximity switch 11, and the detection body 12 is a magnetic block. The upper end of the lifting hook 10 is provided with a buffer spring 13, the buffer spring 13 is sleeved outside the chain 9, the upper end of the buffer spring 13 is provided with a buffer block 14, the upper end of the buffer block 14 is provided with a mounting groove 15, and the detection body 12 is embedded in the mounting groove 15.

[0030] The inside of the output support 21 is fixedly provided with a chain wheel cover 16, and the output sleeve 22 is rotatably arranged in the chain wheel cover 16 through a bearing. The chain wheel body 8 is located inside the chain wheel cover 16.

[0031] Embodiment two: The difference between embodiment two and embodiment one is that, as shown in Figure 4 , Figure 5 the outside of the output sleeve 22 is fixedly provided with a winch rope drum 17, the outside of the winch rope drum 17 is wound with a winch rope 18, one end of the winch rope 18 is fixedly connected to the outer wall of the winch rope drum 17, and the other end of the winch rope 18 is provided with a traction hook 19.

[0032] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A self-locking traction device, characterized by: It comprises motor (1), output mechanism (2) and transmission mechanism (3) arranged in sequence; The output mechanism (2) comprises output support (21) and output sleeve (22), the output support (21) is fixedly connected with the shell of the motor (1), the output sleeve (22) is rotatably arranged in the output support (21), and the output sleeve (22) is coaxially arranged with the output shaft of the motor (1); The transmission mechanism (3) comprises transmission support (31), movable gear ring (32), fixed gear ring (33), sun gear (34), planet carrier (35) and planet gear (36), the transmission support (31) is fixedly connected with the output support (21), the movable gear ring (32) is rotatably arranged in the transmission support (31), the end of the movable gear ring (32) is provided with a connecting baffle (4), the center of the connecting baffle (4) is provided with a connecting sleeve (5), the connecting sleeve (5) extends into the output support (21), the output sleeve (22) is fixedly arranged on the outer side of the connecting sleeve (5), the fixed gear ring (33) is fixedly arranged on the inner side of the transmission support (31), the fixed gear ring (33) is located on the side of the movable gear ring (32) away from the motor (1), the fixed gear ring (33) is coaxially arranged with the movable gear ring (32), the number of teeth of the fixed gear ring (33) is greater than that of the movable gear ring (32), the sun gear (34) is rotatably arranged in the transmission support (31), the end of the sun gear (34) is coaxially provided with a connecting shaft (6), the connecting shaft (6) passes through the connecting sleeve (5) and is connected with the output shaft of the motor (1), the planet carrier (35) is rotatably arranged in the transmission support (31), and the planet carrier (35) is located on the side of the sun gear (34) away from the motor (1), the planet gear (36) is rotatably arranged on the side wall of the planet carrier (35) close to the motor (1), and the planet gear (36) is engaged with the movable gear ring (32), the fixed gear ring (33) and the sun gear (34).

2. A self-locking traction device according to claim 1, characterized in that: The lower end of the output support (21) is provided with a chain storage barrel (7), the outer side of the output sleeve (22) is fixedly provided with a sprocket body (8), the outer side of the sprocket body (8) is provided with a chain (9), one end of the chain (9) extends into the chain storage barrel (7), and the other end of the chain (9) is provided with a lifting hook (10).

3. A self-locking traction device according to claim 2, characterized in that: The lower end of the output support (21) is provided with a proximity switch (11), the upper end of the lifting hook (10) is provided with a detection body (12), when the proximity switch (11) senses the detection body (12), the proximity switch (11) will turn off the motor (1).

4. A self-locking traction device according to claim 3, characterized in that: The upper end of the lifting hook (10) is provided with a buffer spring (13), the buffer spring (13) is sleeved outside the chain (9), the upper end of the buffer spring (13) is provided with a buffer block (14), the upper end of the buffer block (14) is provided with a mounting groove (15), and the detection body (12) is embedded in the mounting groove (15).

5. A self-locking traction device according to claim 2, characterized in that: The inner side of the output support (21) is fixedly provided with a sprocket cover (16), the output sleeve (22) is rotatably arranged in the sprocket cover (16) through a bearing, and the sprocket body (8) is located on the inner side of the sprocket cover (16).

6. A self-locking traction device according to claim 1, characterized in that: The outer side of the output sleeve (22) is fixedly provided with a winch rope cylinder (17), the outer side of the winch rope cylinder (17) is wound with a winch rope (18), one end of the winch rope (18) is fixedly connected to the outer wall of the winch rope cylinder (17), and the other end of the winch rope (18) is provided with a traction hook (19).

Images