Anti-locking lengthened long shaft type chain block

Abstract

The utility model discloses an anti-locking lengthened long shaft type chain block, which belongs to the field of chain block devices, and comprises a chain block body and a driving wheel, a gear ring is arranged between one side of the inner wall of the chain block body and the driving wheel, and the inner wall of the chain block body is connected with the driving wheel. One side of the gear ring is rotationally connected with one side of the inner wall of the chain block body, an inner ratchet ring is fixedly connected to the inner ring surface of the gear ring, a driven wheel is arranged on the inner ring surface of the inner ratchet ring, one side of the driven wheel is rotationally connected with one side of the inner wall of the chain block body, and the driven wheel is fixedly connected with a driving wheel; a plurality of rotating shafts are fixedly connected to the side, close to the driving wheel, of the driven wheel, ratchets are rotationally connected to the exteriors of the rotating shafts, and torsional springs are arranged between the rotating shafts and the ratchets; the chain block can achieve the functions of preventing a single ratchet from being fractured due to overlarge stress when goods fall, effectively reducing the falling speed of the goods and preventing the chain block body from being locked after speed reduction.

Description

Technical Field

[0001] The utility model relates to the field of hand chain hoist devices, and more specifically to an anti-locking and lengthened long-axis hand chain hoist. Background Art

[0002] A chain hoist is a manual lifting machine that is easy to use and carry, suitable for short-distance lifting of small equipment and goods. When in use, the user pulls the chain to drive the internal gear set of the chain hoist to work, thereby achieving the lifting and transport of goods.

[0003] The Chinese patent authorization announcement number: CN217578128U provides an anti-locking hand chain hoist. This patent drives the ratchet to rotate by rotating the rotating shaft, drives the pawl to run repeatedly, and drives the spring to retract and retract repeatedly, which can facilitate the user to pull the guide chain to pull the goods up and down. By pulling the handle upward, the wire rope is driven to move upward, and one end of the pawl is driven to move upward, so that the ratchet is untied, which is convenient for pulling the guide chain back and forth to drive the rotating shaft to rotate, and prevent the guide chain from being locked and unable to be used normally; when the pawl is damaged, the ratchet loses its restraint, and the guide chain is pulled down by the weight of the goods, driving the ratchet to rotate automatically, the teeth are affected by the centrifugal force to expand outward and touch the block, which can block the ratchet from rotating automatically, thereby preventing the goods from automatically falling and causing safety accidents. By turning the screw and removing it, the mounting seat loses its restraint, and it is convenient to remove the block and replace it.

[0004] When the utility model in the above patent is in use, although it can prevent the guide chain of the hand winch from being locked, in the process of preventing the goods from falling automatically, the ratchet is locked only by the engagement between a latch tooth and a block. If the goods are heavy, it is easy to cause the latch tooth and the block to break, causing the ratchet to lose control, and then causing the goods to continue to fall rapidly, posing certain safety hazards. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide an anti-locking extended-axis hand chain hoist, which can prevent a single ratchet from being broken due to excessive force when goods fall, effectively slow down the falling speed of goods and prevent the hand chain hoist body from locking after deceleration.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A locking-proof extended-axis hand chain hoist comprises a hand chain hoist body and a driving wheel, a gear ring is arranged between one side of the inner wall of the hand chain hoist body and the driving wheel, one side of the gear ring is rotatably connected to one side of the inner wall of the hand chain hoist body, an inner ring surface of the gear ring is fixedly connected to an inner ratchet ring, a driven wheel is arranged on the inner ring surface of the inner ratchet ring, one side of the driven wheel is rotatably connected to one side of the inner wall of the hand chain hoist body, the driven wheel is fixedly connected to the driving wheel, a plurality of rotating shafts are fixedly connected to a side of the driven wheel close to the driving wheel, a plurality of ratchets are rotatably connected to the outside of the rotating shafts, a torsion spring is arranged between the rotating shaft and the ratchet, two racks are slidably connected to one side of the inner wall of the hand chain hoist body, the two racks are meshed with the gear ring, and a brake pad is fixedly connected to one side of the two racks.

[0010] Furthermore, one end of the torsion spring is fixedly connected to the outside of the rotating shaft, and the other end of the torsion spring is fixedly connected to the inner wall of the ratchet.

[0011] Furthermore, the two racks are respectively arranged on the left and right sides of the gear ring, and the two racks are arranged outside the gear ring in a centrally symmetrical manner.

[0012] Furthermore, the two brake pads are respectively arranged on the upper and lower sides of the driving wheel.

[0013] Furthermore, two through grooves are formed through one side of the hand chain hoist body, and a sliding column is fixedly connected to one side of the two racks close to the inner wall of the hand chain hoist body.

[0014] Furthermore, the two through grooves are centrally symmetrically distributed on one side of the hand chain hoist body, and the two sliding posts are slidably connected to the two through grooves respectively.

[0015] Furthermore, a sliding groove is penetrated through one side of the inner groove wall of the through groove, a spring rod is fixedly connected to the inside of the sliding groove, an end of the spring rod away from the sliding groove is fixedly connected to a limiting block, the limiting block is slidably connected to the inside of the through groove, and a lever is fixedly connected to one side of the limiting block.

[0016] Furthermore, the shape of the limit block is trapezoidal, and one end of the shift rod is arranged outside the hand chain hoist body.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) In this solution, by providing multiple ratchets to simultaneously share the force exerted when engaging with the inner ratchet ring, it is possible to effectively avoid the breakage caused by excessive force exerted on a single engaging tooth when engaging, thereby effectively reducing the potential safety hazards of the device.

[0020] (2) In this solution, when the cargo falls, the ratchet can engage with the inner ratchet ring to drive the gear ring to rotate, so that the two racks drive the brake pads to contact the driving wheel, thereby achieving a deceleration effect on the driving wheel, which can effectively prevent the cargo from falling quickly. At the same time, when the hand chain hoist body is in normal use, the ratchet will not engage with the inner ratchet ring, so that the hand chain hoist body can work normally, thereby improving the practicality of the equipment.

[0021] (3) In this solution, when the rack drives the brake pad to decelerate the driving wheel, the sliding column will pass through the limit block. After the sliding column is separated from the limit block, the limit block is reset by the spring rod to clamp the sliding column, so that the brake pad can continue to decelerate the driving wheel until it stops. After the driving wheel stops, the staff can move the limit block by the lever, thereby releasing the limiting effect of the limit block on the sliding column. After resetting the rack, the staff can release the lever to allow the hand winch body to be used normally, which can effectively avoid the hand winch body being locked and requiring the staff to disassemble it for repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic cross-sectional view of the back side of the hand chain hoist body in the utility model;

[0024] Figure 3 This is a schematic cross-sectional view of the back of the hand chain hoist body after the driving wheel is removed;

[0025] Figure 4 For this utility model Figure 1 The enlarged schematic diagram of point A in the middle;

[0026] Figure 5 For this utility model Figure 3 A magnified schematic diagram of point B in the middle.

[0027] Description of the numbers in the figure:

[0028] 1. Hand chain hoist body; 101. Through slot; 102. Slide slot; 2. Driving wheel; 3. Gear ring; 4. Inner ratchet ring; 5. Driven wheel; 6. Rotating shaft; 7. Ratchet; 8. Torsion spring; 9. Rack; 10. Brake pad; 11. Sliding column; 12. Limit block; 13. Spring rod; 14. Push rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] Embodiment 1:

[0033] See also Figure 1 - Figure 5 A locking-proof extended-axis hand chain hoist comprises a hand chain hoist body 1 and a driving wheel 2, a gear ring 3 is arranged between one side of the inner wall of the hand chain hoist body 1 and the driving wheel 2, one side of the gear ring 3 is rotatably connected to one side of the inner wall of the hand chain hoist body 1, an inner ring surface of the gear ring 3 is fixedly connected to an inner ratchet ring 4, and a driven wheel 5 is arranged on the inner ring surface of the inner ratchet ring 4, one side of the driven wheel 5 is rotatably connected to one side of the inner wall of the hand chain hoist body 1, the driven wheel 5 is fixedly connected to the driving wheel 2, a plurality of rotating shafts 6 are fixedly connected to one side of the driven wheel 5 close to the driving wheel 2, and ratchets 7 are rotatably connected to the outside of the plurality of rotating shafts 6, and a torsion spring 8 is arranged between the rotating shaft 6 and the ratchet 7, two racks 9 are slidably connected to one side of the inner wall of the hand chain hoist body 1, the two racks 9 are meshed with the gear ring 3, and a brake pad 10 is fixedly connected to one side of the two racks 9.

[0034] One end of the torsion spring 8 is fixedly connected to the outside of the rotating shaft 6 , and the other end of the torsion spring 8 is fixedly connected to the inner wall of the ratchet 7 .

[0035] The two racks 9 are respectively arranged on the left and right sides of the gear ring 3 , and the two racks 9 are arranged outside the gear ring 3 in a centrally symmetrical manner.

[0036] The two brake pads 10 are respectively arranged on the upper and lower sides of the driving wheel 2 .

[0037] The specific implementation process of this embodiment is as follows: the driving wheel 2 is connected to other wheel groups inside the hand chain hoist body 1. When the other wheel groups rotate, the driving wheel 2 will rotate with the wheel groups and drive the driven wheel 5 to rotate. The multiple ratchet teeth 7 are evenly distributed on the driven wheel 5. The multiple ratchet teeth 7 can share the force with each other when engaging with the inner ratchet ring 4, thereby effectively avoiding the breakage caused by excessive force when a single tooth is engaged;

[0038] Taking the attached figure as an example, when the hand chain hoist body 1 is in normal use, the driving wheel 2 rotates counterclockwise, and the driven wheel 5 also rotates counterclockwise. Under the tension of the torsion spring 8, the ratchet 7 contracts and does not engage with the inside of the inner ratchet ring 4. At this time, the hand chain hoist body 1 can drive the goods to be transported upward;

[0039] When the hand chain hoist body 1 puts down the goods, the driving wheel 2 will rotate clockwise with the wheel group. At this time, if the hand chain hoist body 1 is in normal working state, the rotation speed of the driving wheel 2 and the driven wheel 5 is relatively slow, and the centrifugal force exerted on the ratchet 7 on the driven wheel 5 does not exceed the elastic force range of the torsion spring 8. At this time, the ratchet 7 is still not engaged with the inner ratchet surface of the inner ratchet ring 4, so the hand chain hoist body 1 can work normally;

[0040] If the goods on the hand chain hoist body 1 fall down at this time, the goods will pull the chain on the hand chain hoist body 1 to fall quickly, and the chain will drive the wheel group, the driving wheel 2 and the driven wheel 5 to rotate at high speed. At this time, the centrifugal force exerted on the ratchet 7 exceeds the elastic force range of the torsion spring 8, and each ratchet 7 expands outward and engages with the inside of the inner ratchet ring 4, thereby causing the gear ring 3 to rotate clockwise. At this time, the two racks 9 drive the two brake pads 10 to approach the upper and lower sides of the driving wheel 2 and clamp the driving wheel 2, thereby slowing down the driving wheel 2, which can effectively prevent the goods from falling quickly and reduce the hidden dangers of safety accidents.

[0041] Embodiment 2:

[0042] See also Figure 1 - Figure 4 Two through slots 101 are formed through one side of the chain hoist body 1 , and sliding columns 11 are fixedly connected to one side of the two racks 9 close to the inner wall of the chain hoist body 1 .

[0043] The two through slots 101 are centrally symmetrically distributed on one side of the hand chain hoist body 1 , and the two sliding posts 11 are slidably connected to the two through slots 101 , respectively.

[0044] A slide groove 102 is provided on one side of the inner groove wall of the through groove 101, and a spring rod 13 is fixedly connected to the inside of the slide groove 102. One end of the spring rod 13 away from the slide groove 102 is fixedly connected to a limit block 12. The limit block 12 is slidably connected to the inside of the through groove 101, and a lever 14 is fixedly connected to one side of the limit block 12.

[0045] The limiting block 12 is in a trapezoidal shape, and one end of the lever 14 is arranged outside the hand chain hoist body 1 .

[0046] The specific implementation process of this embodiment is as follows: when the rack 9 drives the brake pad 10 to approach the driving wheel 2, the sliding column 11 will slide inside the through groove 101 and contact the limit block 12, and the inclined surface of the limit block 12 faces the sliding column 11. At the first contact, a part of the vertical thrust of the sliding column 11 on the limit block 12 will be converted into a lateral thrust through the inclined surface of the limit block 12, so that the limit block 12 pushes the spring rod 13. At this time, the limit block 12 will briefly enter the slide groove 102 until the sliding column 11 completely passes through the limit block 12. After the limit block 12 is separated from the sliding column 11, the spring rod 13 releases the elastic force to reset the limit block 12. At this time, the limit block 1 2 is in contact with the sliding column 11, and the limit block 12 will jam the sliding column 11, thereby fixing the position of the rack 9, thereby achieving the effect of making the brake pad 10 continue to slow down the driving wheel 2. If the brake pad 10 stops the driving wheel 2 from rotating, the staff can remove the hand chain hoist body 1 at this time, and manually move the lever 14 to make the limit block 12 re-enter the slide groove 102, so as to release the limiting effect of the limit block 12 on the sliding column 11. After resetting the rack 9, the staff can release the lever 14 to make the hand chain hoist body 1 use normally, which can effectively avoid the situation where the hand chain hoist body 1 is locked and needs to be disassembled for repair by the staff.

[0047] The working principle of the utility model is as follows: taking the attached figure as an example, if the goods on the hand chain hoist body 1 fall, the goods will pull the chain on the hand chain hoist body 1 to fall quickly, and the chain will drive the wheel set, the driving wheel 2 and the driven wheel 5 to rotate at high speed. At this time, the centrifugal force on the ratchet 7 exceeds the elastic force range of the torsion spring 8, and each ratchet 7 expands outward and engages with the inside of the inner ratchet ring 4, so that the gear ring 3 rotates clockwise. At this time, the two racks 9 drive the two brake pads 10 to approach the upper and lower sides of the driving wheel 2 and clamp the driving wheel 2, thereby slowing down the driving wheel 2, which can effectively prevent the goods from falling quickly and reduce the hidden dangers of safety accidents.

[0048] When the rack 9 drives the brake pad 10 to approach the driving wheel 2, the sliding column 11 will slide inside the through groove 101 and contact the limit block 12. The inclined surface of the limit block 12 faces the sliding column 11. At the first contact, a part of the vertical thrust of the sliding column 11 on the limit block 12 will be converted into a lateral thrust through the inclined surface of the limit block 12, so that the limit block 12 pushes the spring rod 13. At this time, the limit block 12 will briefly enter the slide groove 102 until the sliding column 11 completely passes through the limit block 12. After the limit block 12 is separated from the sliding column 11, the spring rod 13 releases the elastic force to reset the limit block 12. At this time, the straight surface of the limit block 12 and the sliding column 11 are When the rack 9 is reset, the staff can release the lever 14 to make the hand hoist body 1 use normally, which can effectively avoid the hand hoist body 1 being locked and the need for the staff to disassemble and repair it.

[0049] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. An anti-locking extended-shaft chain hoist, comprising a chain hoist body (1) and a driving wheel (2), characterized in that: A toothed ring (3) is provided between one side of the inner wall of the hand chain hoist body (1) and the driving wheel (2); one side of the toothed ring (3) is rotatably connected to one side of the inner wall of the hand chain hoist body (1); an inner ring surface of the toothed ring (3) is fixedly connected to an inner ratchet ring (4); a driven wheel (5) is provided on the inner ring surface of the inner ratchet ring (4); one side of the driven wheel (5) is rotatably connected to one side of the inner wall of the hand chain hoist body (1); the driven wheel (5) is fixedly connected to the driving wheel (2). The driven wheel (5) is fixedly connected to a side close to the driving wheel (2) with a plurality of rotating shafts (6), the outsides of the plurality of rotating shafts (6) are rotatably connected with ratchets (7), a torsion spring (8) is provided between the rotating shafts (6) and the ratchets (7), one side of the inner wall of the hand chain hoist body (1) is slidably connected with two racks (9), the two racks (9) are meshed with the gear ring (3), and one side of the two racks (9) is fixedly connected with a brake pad (10).

2. The anti-locking extended-shaft chain hoist according to claim 1, characterized in that: One end of the torsion spring (8) is fixedly connected to the outside of the rotating shaft (6), and the other end of the torsion spring (8) is fixedly connected to the inner wall of the ratchet (7).

3. The anti-locking extended-shaft chain hoist according to claim 1, characterized in that: The two racks (9) are respectively arranged on the left and right sides of the gear ring (3), and the two racks (9) are arranged outside the gear ring (3) in a centrally symmetrical manner.

4. The anti-locking extended-shaft chain hoist according to claim 1, characterized in that: The two brake pads (10) are respectively arranged on the upper and lower sides of the driving wheel (2).

5. The anti-locking extended-shaft chain hoist according to claim 1, characterized in that: Two through slots (101) are formed through one side of the hand chain hoist body (1), and a sliding column (11) is fixedly connected to one side of the two racks (9) close to the inner wall of the hand chain hoist body (1).

6. The anti-locking extended-shaft chain hoist according to claim 5, characterized in that: The two through grooves (101) are centrally symmetrically distributed on one side of the hand chain hoist body (1), and the two sliding columns (11) are respectively slidably connected to the two through grooves (101).

7. The anti-locking extended-shaft chain hoist according to claim 6, characterized in that: A sliding groove (102) is provided through one side of the inner groove wall of the through groove (101); a spring rod (13) is fixedly connected inside the sliding groove (102); one end of the spring rod (13) away from the sliding groove (102) is fixedly connected to a limiting block (12); the limiting block (12) is slidably connected inside the through groove (101); and a shifting rod (14) is fixedly connected to one side of the limiting block (12).

8. The anti-locking extended-shaft chain hoist according to claim 7, characterized in that: The limiting block (12) is in the shape of a trapezoid, and one end of the shifting rod (14) is arranged outside the hand chain hoist body (1).

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