A winch with a locking device

Abstract

The utility model relates to the technical field of winches, and discloses a winch with a locking device, comprising a driving motor, a reduction box connected to the output shaft of the driving motor, an output end of the reduction box connected to a bobbin, a shaft holding mechanism and a self-locking mechanism installed on the output shaft of the driving motor, the shaft holding mechanism can lock the output shaft of the driving motor, and when a heavy object is accelerated to descend, the self-locking mechanism locks the output shaft of the driving motor. The device solves the problem that a large locking force is required when the locking device directly acts on the bobbin and the heavy object cannot be prevented from falling abnormally. It can also have a good locking effect when hoisting large-tonnage objects, and can prevent the hoisted object from falling accidentally, thereby improving safety.

Description

Technical Field

[0001] The utility model relates to the technical field of winches, and more specifically, to a winch with a locking device. Background Art

[0002] A winch is a small and light lifting device that uses a drum to wind a wire rope or chain to lift or pull heavy objects. It can be used alone or as a component of machinery such as lifting, road construction and mine hoisting. It is widely used in material lifting or flat towing in construction, water conservancy projects, forestry, mining, docks, etc. due to its simple operation, large rope winding capacity and convenient relocation.

[0003] In order to ensure that the height of the material lifting can be controlled and maintained during use, two arc plates are usually installed symmetrically on both sides of the bobbin. When the two arc plates move toward each other, they can press the bobbin together to prevent the bobbin from continuing to rotate and maintain the height of the material. However, the torque on the bobbin is large, and the locking force required for the arc plate to directly press the bobbin is large. The locking effect is poor for large-tonnage materials, and there is a possibility of accidental falling of the material. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a winch with a locking device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A winch with a locking device comprises a driving motor, a reduction gearbox is connected to the output shaft of the driving motor, a bobbin is connected to the output end of the reduction gearbox, a shaft holding mechanism and a self-locking mechanism are installed on the output shaft of the driving motor, the shaft holding mechanism can lock the output shaft of the driving motor, and the self-locking mechanism locks the output shaft of the driving motor when the heavy object accelerates to descend.

[0007] The utility model is further configured as follows: the self-locking mechanism includes an internally-toothed ratchet, the internally-toothed ratchet is coaxially arranged with the output shaft of the driving motor, a transmission disc 2 is fixed on the output shaft of the driving motor, the transmission disc 2 is close to the internally-toothed ratchet, a plurality of inertia devices are symmetrically mounted on the transmission disc 2, and when the heavy object accelerates down, the inertia devices engage with the internally-toothed ratchet.

[0008] The utility model is further configured as follows: the inertial device includes a pawl, the pawl is rotatably mounted on the second transmission disk, the tip of the pawl is provided with a counterweight and can engage with the internal tooth ratchet, the other end of the pawl extends out of the rotation center of the pawl on the second transmission disk and is connected to a spring, the other end of the spring is fixed on the second transmission disk, and when the spring is in a normal state, the pawl does not contact the internal tooth ratchet.

[0009] The utility model is further configured as follows: the shaft holding mechanism includes a base, a transmission disc 1 is fixed on the output shaft of the driving motor, two shaft arms are rotatably mounted on the base, the two shaft arms are respectively arranged on both sides of the transmission disc 1, and bearings are arranged on the sides facing each other of the two shaft arms, the bearings are arc-shaped structures, and the bearings can be pressed into engagement with the transmission disc 1.

[0010] The utility model is further configured as follows: a hydraulic rod is arranged at one end of the two shaft arms away from the base, and two ends of the hydraulic rod are respectively rotatably connected with the two shaft arms.

[0011] The utility model is further configured as follows: a support frame is fixed on the base, the support frame is arranged in the same vertical plane with the two shaft arms along the vertical direction, a connecting rod is movably installed on the top of the support frame, the end of the connecting rod away from the shaft arm is a handle, the other end of the connecting rod is rotatably connected to the top of the shaft arm on the same side, and the hydraulic rod is rotatably installed on the connecting rod.

[0012] The advantages of the utility model are:

[0013] 1. The shaft-holding mechanism is arranged on the output shaft of the driving motor. When the hydraulic rod at the top is contracted or the connecting rod is pressed, the top ends of the two shaft arms are pushed to move toward each other, so that the bearing bushes hold the transmission disc 1 from both sides, thereby braking the output shaft of the driving motor. The torque on the output shaft of the driving motor is much smaller than the torque on the spool, which reduces the braking force required to be applied to the transmission disc 1 and improves the locking effect in large-tonnage application scenarios;

[0014] 2. A self-locking mechanism is installed on the output shaft of the driving motor. The self-locking mechanism realizes the locking of the output shaft through the active engagement of the inertial device and the internal tooth ratchet: the tip of the pawl is provided with a counterweight. When the weight is accelerated down, the output shaft of the driving motor is driven to rotate faster, and the tip of the pawl overcomes the tension of the spring and is thrown to the outer periphery of the transmission disk 2, thereby engaging with the internal tooth ratchet to prevent the transmission disk 2 from continuing to rotate, that is, the braking of the weight is realized, the weight is prevented from falling, and the safety is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0016] Figure 2 for Figure 1 The front view shown;

[0017] Figure 3 for Figure 2 An enlarged view of part B is shown;

[0018] Figure 4 This is a schematic diagram of the shaft holding mechanism structure of the utility model;

[0019] Figure 5 For along Figure 1 The AA line section is shown;

[0020] In the figure: 1. driving motor; 2. reduction gearbox; 3. bobbin; 4. shaft holding mechanism; 41. transmission disc 1; 42. base; 43. shaft arm; 44. bearing; 45. support frame; 46. connecting rod; 47. hydraulic rod; 5. self-locking mechanism; 51. transmission disc 2; 52. internal tooth ratchet; 53. spring; 54. pawl. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0023] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0024] See also Figure 1-5 , the utility model provides the following technical solutions:

[0025] A winch with a locking device comprises a driving motor 1, a reduction box 2 is connected to the output shaft of the driving motor 1, a bobbin 3 is connected to the output end of the reduction box 2, a shaft holding mechanism 4 and a self-locking mechanism 5 are installed on the output shaft of the driving motor 1, when the height of the hanging weight needs to be maintained during normal use, the shaft holding mechanism 4 can lock the output shaft of the driving motor 1 to brake the bobbin 3; when the winch loses traction on the hanging weight and the hanging weight accelerates to descend, the self-locking mechanism 5 can automatically lock the output shaft of the driving motor 1, brake the bobbin 3, and prevent the hanging weight from falling.

[0026] The self-locking mechanism 5 includes an internally-toothed ratchet 52, which is coaxially arranged with the output shaft of the driving motor 1. A second transmission disc 51 is fixed on the output shaft of the driving motor 1, and the second transmission disc 51 is close to the internally-toothed ratchet 52. A plurality of inertial devices are symmetrically mounted on the second transmission disc 52. When the load is accelerated to descend, the inertial devices are thrown out and engaged with the internally-toothed ratchet 52, thereby preventing the output shaft from continuing to rotate and preventing the load from falling.

[0027] The inertial device includes a pawl 54, which is rotatably mounted on the transmission disk 2 51. The tip of the pawl 54 is provided with a counterweight and can engage with the internal-toothed ratchet 52. The other end of the pawl 54 extends out of the rotation center of the pawl 54 on the transmission disk 2 51 and is connected to a spring 53. The other end of the spring 53 is fixed on the transmission disk 2 51. When the spring 53 is in a normal state, the pawl 54 does not contact the internal-toothed ratchet 52. When an unexpected hanging weight is accelerated to descend, the spool 3 accelerates the rotation of the output shaft of the drive motor 1 through the reduction gear box 2. At this time, the counterweight drives the tip of the pawl 54 to be thrown toward the edge of the transmission disk 2 51, so that the pawl 54 engages with the internal-toothed ratchet 52, preventing the transmission disk 2 51 from continuing to rotate, that is, the spool 3 stops rotating to prevent the hanging weight from falling.

[0028] The shaft holding mechanism 4 includes a base 42, a transmission disc 41 is fixed on the output shaft of the driving motor 1, two shaft arms 43 are rotatably mounted on the base 42, the two shaft arms 43 are respectively arranged on both sides of the transmission disc 41, and the two shaft arms 43 are arranged on the opposite sides of each other with bearing bushes 44, the bearing bushes 44 are arc-shaped structures, and the bearing bushes 44 can be pressed with the transmission disc 41;

[0029] A support frame 45 is fixed on the base 42. The support frame 45 is arranged in the same vertical plane with the two shaft arms 43 along the vertical direction. A connecting rod 46 is movably installed on the top of the support frame 45. The end of the connecting rod 46 away from the shaft arm 43 is a handle, and the other end of the connecting rod 46 is rotatably connected to the top of the shaft arm 43 on the same side. A hydraulic rod 47 is rotatably installed on the top of the shaft arm 43 away from the connecting rod 46, and the other end of the hydraulic rod 47 is rotatably installed on the connecting rod 46; contracting the hydraulic rod 47 or pressing down the handle can pull the top ends of the two shaft arms 43 closer to each other, so that the two bearings 44 symmetrically press the transmission plate 41 from both sides, thereby realizing the braking of the output shaft of the drive motor 1.

[0030] Specifically, the shaft-holding mechanism 4 is arranged on the output shaft of the driving motor 1. When the hydraulic rod 47 at the top is contracted or the connecting rod 46 is pressed, the top ends of the two shaft arms 43 are pushed to move toward each other, so that the bearing bushes 44 hold the transmission disc 1 41 from both sides, thereby braking the output shaft of the driving motor 1. The torque on the output shaft of the driving motor 1 is much smaller than the torque on the spool 3, which reduces the braking force required to be applied to the transmission disc 1 41 and improves the locking effect in large-tonnage application scenarios.

[0031] A self-locking mechanism 5 is installed on the output shaft of the driving motor 1. The self-locking mechanism 5 realizes the locking of the output shaft through the active engagement of the inertial device and the internal tooth ratchet 52: the tip of the pawl 54 is provided with a counterweight. When the weight is accelerated and descended, the output shaft of the driving motor 1 is driven to rotate faster, and the tip of the pawl 54 overcomes the pulling force of the spring 53 and is thrown to the outer periphery of the transmission disk 2 51, thereby engaging with the internal tooth ratchet 52, preventing the transmission disk 2 51 from continuing to rotate, thereby realizing the braking of the weight, preventing the weight from falling, and improving safety.

[0032] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar opposites, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0035] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A winch with a locking device, comprising a drive motor (1), characterized in that: The output shaft of the drive motor (1) is connected to a reduction box (2), the output end of the reduction box (2) is connected to a bobbin (3), and the output shaft of the drive motor (1) is equipped with a shaft-holding mechanism (4) and a self-locking mechanism (5), wherein the shaft-holding mechanism (4) can lock the output shaft of the drive motor (1), and when the heavy object is accelerated to descend, the self-locking mechanism (5) locks the output shaft of the drive motor (1).

2. A winch with a locking device according to claim 1, characterized in that: The self-locking mechanism (5) comprises an internally toothed ratchet (52), the internally toothed ratchet (52) being coaxially arranged with the output shaft of the driving motor (1), a second transmission disc (51) being fixed on the output shaft of the driving motor (1), the second transmission disc (51) being close to the internally toothed ratchet (52), a plurality of inertia devices being symmetrically mounted on the second transmission disc (51), and when the heavy object is accelerated to descend, the inertia devices are engaged with the internally toothed ratchet (52).

3. A winch with a locking device according to claim 2, characterized in that: The inertia device comprises a pawl (54), the pawl (54) is rotatably mounted on the second transmission disc (51), a pawl tip of the pawl (54) is provided with a counterweight and can be engaged with the internal tooth ratchet (52), the other end of the pawl (54) extends out of the rotation center of the pawl (54) on the second transmission disc (51) and is connected to a spring (53), the other end of the spring (53) is fixed on the second transmission disc (51), and when the spring (53) is in a normal state, the pawl (54) does not contact the internal tooth ratchet (52).

4. A winch with a locking device according to claim 1, characterized in that: The shaft-holding mechanism (4) comprises a base (42), a transmission disc (41) is fixed on the output shaft of the drive motor (1), two shaft arms (43) are rotatably mounted on the base (42), the two shaft arms (43) are arranged on both sides of the transmission disc (41), and bearing bushes (44) are arranged on the opposite sides of the two shaft arms (43), the bearing bushes (44) are of arc-shaped structure, and the bearing bushes (44) can be pressed together with the transmission disc (41).

5. A winch with a locking device according to claim 4, characterized in that: A hydraulic rod (47) is provided at one end of the two shaft arms (43) away from the base (42), and both ends of the hydraulic rod (47) are rotatably connected to the two shaft arms (43) respectively.

6. A winch with a locking device according to claim 5, characterized in that: A support frame (45) is fixed on the base (42). The support frame (45) is arranged in the same vertical plane with the two shaft arms (43) along the vertical direction. A connecting rod (46) is movably installed at the top of the support frame (45). The end of the connecting rod (46) away from the shaft arm (43) is a handle. The other end of the connecting rod (46) is rotatably connected to the top of the shaft arm (43) on the same side. The hydraulic rod (47) is rotatably installed on the connecting rod (46).

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