Safety device for winch

Abstract

The utility model relates to the technical field of winch safety devices, and discloses a winch safety device which comprises a right side plate, a limiting and fixing mechanism is arranged on the top of the right side plate, a self-locking mechanism is arranged on the left side of the right side plate, a left side plate is arranged outside the self-locking mechanism, and a rotating speed measuring instrument is arranged on the front face of the left side plate. A limiting and fixing mechanism is arranged, a first motor is started, so that a fixing block abuts against the outer portion of a reel pipe, meanwhile, a fourth bevel gear drives a first screw to rotate, a moving disc is driven to move leftwards in the rotating process of the first screw, a supporting block is limited by a limiting frame, and therefore the supporting block is driven to move outwards in the moving process of a connecting rod; and the supporting blocks and the fixing blocks abut against the inner portion and the outer portion of the winding drum, so that the contact area of the supporting blocks and the winding drum is increased, the friction force is further improved through inner and outer double insurance, and the better friction braking effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hoist safety devices, and specifically relates to a safety device for a hoist. Background Technique

[0002] The use of the hoist safety device is mainly reflected in the safety protection of the hoist and the operator. First of all, the hoist safety device can prevent damage caused by abnormal conditions during the operation of the equipment for various reasons. Similarly, the overspeed prevention device can also automatically cut off the power supply and activate the safety brake when the lifting speed exceeds the set value of the maximum speed, so as to avoid equipment damage or personal injury caused by excessive speed.

[0003] In a hoist safety device (authorized announcement number: CN 215048283 U) disclosed on the patent network, it is described that "a hoist safety device includes a left side plate, a right side plate and a roller. The roller is rotatably connected between the left side plate and the right side plate. A first motor is installed on the left side of the left side plate. The output end of the first motor penetrates the left side plate and extends to the right side of the left side plate and is fixedly connected to the roller. The upper end surface of the right side plate is fixedly connected with a mounting plate, and a second motor drives a lead screw to rotate between the upper fixing plate and the lower fixing plate."

[0004] Regarding the above description, the applicant believes that the following problems exist:

[0005] During the use of this utility model, the movable plate on the outer wall is driven to move downward by the rotation of the lead screw. The movable plate drives two vertical rods and a push plate to move downward. The push plate drives a push rod and a brake piece to move downward, so that the brake piece contacts the outer wall of the roller for frictional braking, thereby realizing the protection of the loosening of the steel wire rope. However, in actual use, the device only drives the movable plate on the outer wall to move downward by the lead screw, and then the movable plate drives two vertical rods and a push block to move downward, so that the brake piece contacts the outer wall of the roller. And because the contact area between the brake piece and the roller is limited, when the speed of the roller is too fast, the limiting effect is not good, so the device cannot brake it more effectively and stably. And only the external motor drives the roller to rotate, so when the motor does not rotate, the roller is prone to self-rotation. Therefore, a safety device for a hoist needs to be improved. Content of the Utility Model

[0006] The purpose of the utility model is to provide a safety device for a hoist to solve the problems raised in the above background technique.

[0007] To achieve the above object, the utility model provides the following technical solutions: A safety device for a winch, including a right side plate, a limiting and fixing mechanism is arranged at the top of the right side plate, a self-locking mechanism is arranged on the left side of the right side plate, a left side plate is arranged outside the self-locking mechanism, a rotational speed measuring instrument is arranged on the front of the left side plate, and a controller is arranged on the right side of the right side plate;

[0008] The limiting and fixing mechanism includes a limiting component and a fixing component. The fixing component is arranged at the bottom of the limiting component, which is convenient for playing a fixing and limiting role when the speed of the roller is too fast, thereby preventing the roller from rotating.

[0009] Preferably, the limiting component includes a connecting plate. The connecting plate is fixedly connected to the top of the right side plate. A first screw rod is rotatably connected inside the connecting plate. A moving plate is threadedly connected to the outside of the first screw rod. One end of the connecting rod away from the moving plate is also rotatably connected to a supporting block. A supporting plate is fixedly connected to the top of the right side plate. A limiting frame is fixedly connected to the left side of the supporting plate, which is convenient for driving the supporting block to contact the roller from the inside, thereby blocking the rotation of the roller.

[0010] Preferably, a groove is opened at the corresponding position of the limiting frame and the supporting block, and the supporting block is slidably connected in the groove, which is convenient for driving the supporting block to move outwards.

[0011] Preferably, the fixing component includes a first motor. The first motor is fixedly connected to the top of the right side plate. The output end of the first motor is fixedly connected to a bidirectional screw rod. A first bevel gear is fixedly connected to the outside of the bidirectional screw rod. A second bevel gear is meshed with the outside of the first bevel gear. A third bevel gear is fixedly connected to the top of the second bevel gear. A fourth bevel gear is meshed with the outside of the third bevel gear. A fixing block is threadedly connected to the outside of the bidirectional screw rod, which is convenient for contacting the roller from the outside, thereby blocking the rotation of the roller, and is convenient for playing a self-locking role during the period when the second motor does not rotate.

[0012] Preferably, the bidirectional screw rod is rotatably connected to the top of the right side plate. A groove is opened at the corresponding position of the fixing block and the right side plate, and the fixing block is slidably connected in the groove. The first bevel gear is rotatably connected to the right side of the connecting plate, and the fourth bevel gear is fixedly connected to the right side of the first screw rod, which is convenient for synchronously driving the fixing block, the supporting block and the roller to abut.

[0013] Preferably, the self-locking mechanism includes a shaft seat. The shaft seat is fixedly connected to the left side of the right side plate. A roller is rotatably connected inside the shaft seat. A first gear is fixedly connected to the left side of the roller. A second gear is meshed with the outside of the first gear. A worm gear is fixedly connected to the left side of the second gear. A connecting frame is fixedly connected to the left side of the left side plate. A second motor is fixedly connected to the back of the connecting frame. The output end of the second motor is fixedly connected to a worm.

[0014] Preferably, the worm gear meshes outside the worm, and the second gear is rotatably connected to the left side of the left side plate, and the first gear is rotatably connected to the left side of the left side plate, facilitating the driving of the roller to rotate.

[0015] Compared with the prior art, the present utility model provides a safety device for a winch, having the following beneficial effects:

[0016] For this safety device for a winch, through the provided limiting and fixing mechanism, by starting the first motor, the fixing block abuts against the outside of the winding tube. Meanwhile, the fourth bevel gear drives the first screw rod to rotate, and during the rotation of the first screw rod, the moving disk is driven to move leftward. Moreover, the supporting block is restricted by the limiting frame, so that during the movement of the connecting rod, the supporting block is driven to move outward, thus enabling the supporting block to abut against the inside of the roller. And through the abutment of the supporting block and the fixing block against the inside and outside of the drum, the contact area with the drum is increased, and through the double insurance of the inside and outside, the friction force is further increased, achieving a better friction braking effect.

[0017] For this safety device for a winch, through the provided self-locking mechanism, by starting the second motor, the second motor drives the worm to rotate, and then the worm drives the worm gear to rotate, and the first gear drives the roller to rotate, thus ensuring the stable rotation of the roller. And when the second motor is not started, through the cooperation of the worm and the worm gear, during the non-rotation of the second motor, the roller will not rotate automatically, further improving the overall safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0019] Figure 1 It is a schematic diagram of the external structure of the present utility model;

[0020] Figure 2 It is a schematic diagram of the external structure of the limiting and fixing mechanism of the present utility model;

[0021] Figure 3 It is a schematic diagram of the external structure of the limiting component of the present utility model;

[0022] Figure 4 It is a schematic diagram of the external structure of the fixing component of the present utility model;

[0023] Figure 5 It is a schematic diagram of the unfolded structure of the self-locking mechanism of the present utility model.

[0024] In the figure: 1. Right side plate; 2. Restriction and fixation mechanism; 3. Self-locking mechanism; 4. Left side plate; 5. Rotation speed measuring instrument; 6. Controller; 21. Restriction component; 22. Fixation component; 211. Connecting plate; 212. First screw; 213. Moving plate; 214. Connecting rod; 215. Support block; 216. Limiting frame; 217. Support plate; 221. First motor; 222. Bi-directional screw; 223. First bevel gear; 224. Second bevel gear; 225. Third bevel gear; 226. Fourth bevel gear; 227. Fixed block; 31. Axle seat; 32. Roller; 33. First gear; 34. Second gear; 35. Worm gear; 36. Worm; 37. Second motor; 38. Connecting frame. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Embodiment 1:

[0027] Please refer to Figures 1-5 , the present invention provides a technical solution: A safety device for a winch, including a right side plate 1, a restriction and fixation mechanism 2 is arranged at the top of the right side plate 1, a self-locking mechanism 3 is arranged on the left side of the right side plate 1, a left side plate 4 is arranged outside the self-locking mechanism 3, a rotation speed measuring instrument 5 is arranged on the front of the left side plate 4, and a controller 6 is arranged on the right side of the right side plate 1;

[0028] The restriction and fixation mechanism 2 includes a restriction component 21 and a fixation component 22. The fixation component 22 is arranged at the bottom of the restriction component 21, which is convenient for playing a role in fixing and restricting when the speed of the roller 32 is too fast, thereby preventing the roller 32 from rotating.

[0029] Further, the limiting component 21 includes a connecting plate 211. The connecting plate 211 is fixedly connected to the top of the right side plate 1. A first screw rod 212 is rotatably connected inside the connecting plate 211. A moving disk 213 is threadedly connected to the outside of the first screw rod 212. A connecting rod 214 is rotatably connected to the left side of the moving disk 213. One end of the connecting rod 214 away from the moving disk 213 is also rotatably connected to a supporting block 215. A supporting plate 217 is fixedly connected to the top of the right side plate 1. A limiting frame 216 is fixedly connected to the left side of the supporting plate 217, facilitating driving the supporting block 215 inside to contact the roller 32, thereby blocking the rotation of the roller 32.

[0030] Further, a groove is formed at the corresponding position of the limiting frame 216 and the supporting block 215, and the supporting block 215 is slidably connected in the groove, facilitating driving the supporting block 215 to move outwards.

[0031] Further, the fixing component 22 includes a first motor 221. The first motor 221 is fixedly connected to the top of the right side plate 1. A bidirectional screw rod 222 is fixedly connected to the output end of the first motor 221. A first bevel gear 223 is fixedly connected to the outside of the bidirectional screw rod 222. A second bevel gear 224 is meshed with the outside of the first bevel gear 223. A third bevel gear 225 is fixedly connected to the top of the second bevel gear 224. A fourth bevel gear 226 is meshed with the outside of the third bevel gear 225. A fixing block 227 is threadedly connected to the outside of the bidirectional screw rod 222, facilitating contacting the roller 32 from the outside, thereby blocking the rotation of the roller 32, and facilitating playing a self-locking role during the period when the second motor 37 does not rotate.

[0032] Further, the bidirectional screw rod 222 is rotatably connected to the top of the right side plate 1. Grooves are formed at the corresponding positions of the fixing block 227 and the right side plate 1, and the fixing block 227 is slidably connected in the grooves. The first bevel gear 223 is rotatably connected to the right side of the connecting plate 211, and the fourth bevel gear 226 is fixedly connected to the right side of the first screw rod 212, facilitating synchronously driving the fixing block 227 and the supporting block 215 to abut against the roller 32. Embodiment 2:

[0033] Please refer to Figure 5 and, in combination with Embodiment 1, it is further obtained that the self-locking mechanism 3 includes a shaft seat 31. The shaft seat 31 is fixedly connected to the left side of the right side plate 1. A roller 32 is rotatably connected inside the shaft seat 31. A first gear 33 is fixedly connected to the left side of the roller 32. A second gear 34 is meshed with the outside of the first gear 33. A worm gear 35 is fixedly connected to the left side of the second gear 34. A connecting frame 38 is fixedly connected to the left side of the left side plate 4. A second motor 37 is fixedly connected to the back of the connecting frame 38. A worm 36 is fixedly connected to the output end of the second motor 37.

[0034] Further, the worm gear 35 meshes outside the worm 36, and the second gear 34 is rotatably connected to the left side of the left side plate 4, and the first gear 33 is rotatably connected to the left side of the left side plate 4, facilitating the driving of the roller 32 to rotate.

[0035] During the actual operation process, when the device is in use, first, when the steel wire rope is loose, after the speed of the external roller 32 becomes too fast and is measured by the rotational speed measuring instrument 5, through the set limiting and fixing mechanism 2, by starting the first motor 221, the first motor 221 drives the bidirectional screw 222 to rotate, and then the bidirectional screw 222 drives the fixing block 227 to move inward, so that the fixing block 227 abuts against the outside of the coiling tube. At the same time, the bidirectional screw 222 drives the first bevel gear 223 to rotate, and then the first bevel gear 223 drives the second bevel gear 224 to rotate, so that the second bevel gear 224 drives the third bevel gear 225 to rotate, and then the third bevel gear 225 drives the fourth bevel gear 226 to rotate, so that the fourth bevel gear 226 drives the first screw 212 to rotate. During the rotation of the first screw 212, the moving disk 213 is driven to move leftward, so that the connecting rod 214 is driven to move by the moving disk 213. The supporting block 215 is restricted by the limiting frame 216, so that the supporting block 215 is driven to move outward during the movement of the connecting rod 214, so that the supporting block 215 abuts against the inside of the roller 32. And through the abutment of the supporting block 215 and the fixing block 227 against the inside and outside of the coiling drum, during daily use, through the set self-locking mechanism 3, by starting the second motor 37, the second motor 37 drives the worm 36 to rotate, and then the worm 36 drives the worm gear 35 to rotate, so that the worm gear 35 drives the second gear 34 to rotate, and then the second gear 34 drives the first gear 33 to rotate, and the first gear 33 drives the roller 32 to rotate, so as to ensure the stable rotation of the roller 32. And when the second motor 37 is not started, through the cooperation of the worm 36 and the worm gear 35, during the non-rotation of the second motor 37, the roller 32 will not rotate by itself.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A safety device for a hoist, including a right side plate (1), characterized in that: A limiting and fixing mechanism (2) is provided at the top of the right side plate (1). A self-locking mechanism (3) is provided on the left side of the right side plate (1). A left side plate (4) is provided outside the self-locking mechanism (3). A rotational speed measuring instrument (5) is provided on the front surface of the left side plate (4). A controller (6) is provided on the right side of the right side plate (1). The limiting and fixing mechanism (2) includes a limiting component (21) and a fixing component (22). The fixing component (22) is provided at the bottom of the limiting component (21).

2. The safety device for a hoist according to claim 1, wherein: The limiting component (21) includes a connecting plate (211). The connecting plate (211) is fixedly connected to the top of the right side plate (1). A first screw rod (212) is rotatably connected inside the connecting plate (211). A moving disk (213) is threadedly connected to the outside of the first screw rod (212). A connecting rod (214) is rotatably connected to the left side of the moving disk (213). One end of the connecting rod (214) away from the moving disk (213) is also rotatably connected to a supporting block (215). A supporting plate (217) is fixedly connected to the top of the right side plate (1). A limiting frame (216) is fixedly connected to the left side of the supporting plate (217).

3. The safety device for a winch according to claim 2, characterized in that: Grooves are provided at the corresponding positions of the limiting frame (216) and the supporting block (215), and the supporting block (215) is slidably connected in the grooves.

4. The safety device for a winch according to claim 2, wherein: The fixing component (22) includes a first motor (221). The first motor (221) is fixedly connected to the top of the right side plate (1). A bidirectional screw rod (222) is fixedly connected to the output end of the first motor (221). A first bevel gear (223) is fixedly connected to the outside of the bidirectional screw rod (222). A second bevel gear (224) is meshed with the outside of the first bevel gear (223). A third bevel gear (225) is fixedly connected to the top of the second bevel gear (224). A fourth bevel gear (226) is meshed with the outside of the third bevel gear (225). A fixing block (227) is threadedly connected to the outside of the bidirectional screw rod (222).

5. The safety device for a hoist according to claim 4, characterized in that: The bidirectional screw rod (222) is rotatably connected to the top of the right side plate (1). Grooves are provided at the corresponding positions of the fixing block (227) and the right side plate (1), and the fixing block (227) is slidably connected in the grooves. The first bevel gear (223) is rotatably connected to the right side of the connecting plate (211), and the fourth bevel gear (226) is fixedly connected to the right side of the first screw rod (212).

6. The safety device for a hoist according to claim 1, wherein: The self-locking mechanism (3) includes a shaft seat (31). The shaft seat (31) is fixedly connected to the left side of the right side plate (1). A roller (32) is rotatably connected to the inside of the shaft seat (31). A first gear (33) is fixedly connected to the left side of the roller (32). A second gear (34) is meshed with the outside of the first gear (33). A worm gear (35) is fixedly connected to the left side of the second gear (34). A connecting frame (38) is fixedly connected to the left side of the left side plate (4). A second motor (37) is fixedly connected to the back of the connecting frame (38). A worm (36) is fixedly connected to the output end of the second motor (37).

7. The safety device for a winch according to claim 6, characterized in that: The worm gear (35) is engaged outside the worm (36), and the second gear (34) is rotatably connected to the left side of the left side plate (4), and the first gear (33) is rotatably connected to the left side of the left side plate (4).

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