Rotatable lifting hook anti-unhooking device with eccentric lock catch

Abstract

The invention discloses a rotatable lifting hook anti-unhooking device with an eccentric lock catch, and relates to the technical field of crane lifting hook equipment, and the rotatable lifting hook anti-unhooking device comprises an anti-unhooking assembly which comprises a fixed part fixedly connected to an external lifting hook and a rotating part rotationally connected to the fixed part; the rotating part is provided with an anti-unhooking separation blade; a first reset piece is connected between the rotating part and the fixed part; the fixing assembly comprises an eccentric lock catch rotationally arranged on the rotating part and a groove formed in the fixing part. The groove is used for locking the eccentric lock catch, so that the rotating part does not rotate; a second reset piece is arranged between the eccentric lock catch and the rotating part; in a normal state, the eccentric lock catch is embedded into the groove under the action of the second reset piece, and the hook opening is sealed by the anti-unhooking hook blocking piece; unlocking can be achieved by pulling the eccentric lock catch, the rotating part automatically rotates under the action of the first reset piece, the anti-unhooking hook blocking piece avoids a lifting hook opening, and automatic opening is achieved. When the rotating part is pushed reversely, the groove and the eccentric lock catch are automatically locked after being aligned, and the anti-unhooking separation blade is reset and closed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crane hook equipment, in particular to a rotatable hook anti-unhooking device with eccentric lock. BACKGROUND

[0002] The hook anti-unhooking device is an important device to ensure production safety. The commonly used hook anti-unhooking device is a blocking piece fixed on the front of the hook. In order to take the lifting tool, the operator needs to keep pressing the blocking piece all the time, which cannot realize automatic opening. In addition, the blocking piece cannot be completely removed from the hook opening, and if the lifting tool is large, the blocking piece will hinder the hanging and taking of the lifting tool, which may cause damage to the hook anti-unhooking device, so the damage rate of the device is very high and it needs to be replaced frequently.

[0003] The patent No. CN107522089A discloses a kind of anti-unhooking safety device, including anti-unhooking plate, hook pin shaft, nut and compression spring;The anti-unhooking plate includes vertical part and inclined blocking part, the vertical part is connected with one end of hook pin shaft, located on one side of hook opening, the inclined blocking part is inclinedly arranged and blocked in the position of hook opening, the lower end of vertical part is provided with positioning protrusion towards one side of hook, the other end of hook pin shaft is provided with external thread, located outside of hook pin shaft hole on hook, nut is provided with external thread, the nut and the hook pin shaft hole are arranged on the hook pin shaft and provided with compression spring;The device only needs to push the pin shaft horizontally and rotate axially, which can adjust the position of anti-unhooking safety device and play the function of hook anti-unhooking.

[0004] However, the device can only realize the function of completely removing the blocking piece from the hook opening, and cannot realize automatic opening and automatic locking. SUMMARY

[0005] In view of the shortcomings of the prior art, the main purpose of the present application is to provide a rotatable hook anti-unhooking device with eccentric lock, which solves the problem that the existing anti-unhooking device cannot be operated with one hand.

[0006] To achieve the above purpose, the present application provides a rotatable hook anti-unhooking device with eccentric lock, which comprises: The anti-unhooking assembly comprises a fixed part fixedly connected to the outer hook, and a rotating part rotatably connected to the fixed part;The rotating part is provided with an anti-unhooking blocking piece, which is used to close the hook opening;The first reset member is connected between the rotating part and the fixed part; The fixed assembly comprises an eccentric lock rotatably arranged on the rotating part, and a groove arranged on the fixed part;The groove is used to lock the eccentric lock, so that the rotating part does not rotate;The second reset member is arranged between the eccentric lock and the rotating part; Under the action of external force, the eccentric lock is rotated and disengaged from the groove. The rotating part rotates around the central axis of the fixed part under the drive of the first reset member, thereby causing the anti-disengagement baffle to avoid the hook opening. Under the action of external force, the rotating part is rotated so that the anti-disengagement baffle is facing the hook opening and the groove is facing the eccentric lock. The eccentric lock rotates under the drive of the second reset member and automatically locks into the groove.

[0007] As a further improvement of the present invention, the fixing part includes: a front fixing sleeve and a rear fixing sleeve fixedly connected to the front fixing sleeve; the front fixing sleeve and the rear fixing sleeve are combined to form a complete annular structure.

[0008] As a further improvement of the present invention, the rotating part includes: a front rotating sleeve and a rear rotating sleeve fixedly connected to the front rotating part; the front rotating sleeve and the rear rotating sleeve are combined to form a complete annular structure.

[0009] As a further improvement of the present invention, the annular structure of the front rotating sleeve and the rear rotating sleeve combination is clearance-fitted with the annular structure of the front fixed sleeve and the rear fixed sleeve combination.

[0010] As a further improvement of the present invention, an annular groove is provided on the outer side of the front fixed sleeve and the rear fixed sleeve, and an annular slider is provided on the inner side of the front rotating sleeve and the rear rotating sleeve; the annular slider is rotatably disposed in the annular groove to limit the axial movement between the front fixed sleeve, the rear fixed sleeve and the front rotating sleeve, and the rear rotating sleeve.

[0011] As a further improvement of the present invention, the first reset member is specifically a torsion spring. The top of the front fixed sleeve and the rear fixed sleeve are provided with a first annular boss, and the top of the front rotating sleeve and the rear rotating sleeve are provided with a second annular boss. The first reset member is sleeved on the outside of the front fixed sleeve and the rear fixed sleeve, and the first reset member is disposed between the first annular boss and the second annular boss. One end of the first reset member is fixedly connected to the first annular boss, and the other end of the first reset member is fixedly connected to the second annular boss. When the anti-disengagement baffle is facing the hook opening, the first reset member is in a tensioned state. Under the action of the elastic force of the first reset member, the anti-disengagement baffle automatically turns to one side of the hook to open the hook opening.

[0012] As a further improvement of the present invention, the rear rotating sleeve is provided with two locking bosses with holes, and a pin is provided inside the locking boss, and an eccentric lock is rotatably connected to the pin; a rectangular through hole is provided at the position where the locking boss is provided on the rear rotating sleeve, and the rectangular through hole is used to avoid the eccentric lock.

[0013] As a further improvement of the present invention, the second reset member is specifically a torsion spring. The second reset member is sleeved outside the pin shaft. One end of the second reset member is fixedly connected to the rear rotating sleeve, and the other end of the second reset member is fixedly connected to the eccentric lock. The eccentric lock is always in a tensioned state. When the groove is not aligned with the eccentric lock, the eccentric lock is always in close contact with the outer surfaces of the rear fixed sleeve and the front fixed sleeve under the action of elastic force. When the groove is aligned with the eccentric lock, the eccentric lock automatically embeds into the groove under the action of elastic force to fix the position of the anti-disengagement baffle.

[0014] As a further improvement of the present invention, the eccentric lock is specifically a structure in which a cuboid is connected to an eccentric disk.

[0015] The beneficial effects of this invention are reflected in: This device features a rotatable anti-disengagement baffle and an eccentric lock. Combined with a mechanism where the first and second reset components drive the rotating part to spring back and the eccentric lock to reset, respectively, and the reset process serves as a mechanism for automatic activation and power storage, this achieves automatic opening and locking of the anti-disengagement baffle. This allows the operator to hook and unhook the lifting device with one hand, significantly reducing labor intensity and improving work efficiency. Furthermore, the rotatable anti-disengagement baffle ensures that the hook opening is completely clear when the device is opened, avoiding interference from traditional fixed baffles on large lifting devices. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a rotatable hook anti-disengagement device with an eccentric locking buckle of the present invention when installed on a lifting device; Figure 2 This is a schematic diagram of the overall structure of a rotatable hook anti-disengagement device with an eccentric locking buckle according to the present invention; Figure 3 This is a rear view of a rotatable hook anti-disengagement device with an eccentric locking buckle according to the present invention; Figure 4 This is a schematic diagram of the fixing part of a rotatable hook anti-disengagement device with an eccentric locking buckle according to the present invention; Figure 5 This is a schematic diagram of the rotating part of a rotatable hook anti-disengagement device with an eccentric locking buckle according to the present invention; Figure 6 This is a cross-sectional view of the anti-disengagement device for a rotatable hook with an eccentric locking mechanism of the present invention when locked. Figure 7 This is a cross-sectional view of the anti-disengagement device for a rotatable hook with an eccentric locking buckle of the present invention when it is being unlocked.

[0017] Explanation of reference numerals in the attached figures: 1. Fixing part; 101. Front fixing sleeve; 102. Rear fixing sleeve; 103. Annular groove; 104. First annular boss; 2. Rotating part; 201. Front rotating sleeve; 202. Rear rotating sleeve; 203. Annular slider; 204. Second annular boss; 205. Locking boss; 206. Pin; 207. Rectangular through hole; 3. Anti-disengagement baffle; 4. First reset component; 5. Eccentric lock; 6. Groove; 7. Second reset component. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In one embodiment, see Figures 1-7 The present invention provides a rotatable hook anti-disengagement device with an eccentric locking buckle, comprising: an anti-disengagement component and a fixing component; The anti-detachment component includes: a fixed part 1 fixedly connected to an external hook, and a rotating part 2 rotatably connected to the fixed part 1; the rotating part 2 is provided with an anti-detachment hook baffle 3, which is used to close the hook opening; a first reset member 4 is connected between the rotating part 2 and the fixed part 1. The fixing component includes: an eccentric lock 5 rotatably disposed on the rotating part 2 and a groove 6 disposed on the fixing part 1; the groove 6 is used to lock the eccentric lock 5 in place so that the rotating part 2 does not rotate; a second reset member 7 is disposed between the eccentric lock 5 and the rotating part 2. Under the action of external force, the eccentric lock 5 is rotated and the eccentric lock 5 is disengaged from the groove 6. The rotating part 2 rotates around the central axis of the fixed part 1 under the drive of the first reset part 4, thereby causing the anti-disengagement baffle 3 to avoid the hook opening. Under the action of external force, the rotating part 2 is rotated so that the anti-disengagement baffle 3 is directly facing the hook opening. At this time, the groove 6 is directly facing the eccentric lock 5. The eccentric lock 5 rotates under the drive of the second reset part 7 and automatically locks into the groove 6.

[0020] Preferably, the eccentric lock 5 is a structure of a cuboid connected to an eccentric disc.

[0021] Preferably, the size, shape, and included angle between the anti-detachment baffle 3 and the rotating part 2 are designed according to the specific shape and size of the matching hook.

[0022] Preferably, limiting blocks are provided on the fixed part 1 and the rotating part 2 respectively, and the limiting blocks are used to limit the range of relative rotation between the fixed part 1 and the rotating part 2.

[0023] Furthermore, the fixing part 1 includes: a front fixing sleeve 101 and a rear fixing sleeve 102 fixedly connected to the front fixing sleeve 101; the front fixing sleeve 101 and the rear fixing sleeve 102 are combined to form a complete annular structure.

[0024] Preferably, the front fixing sleeve 101 and the rear fixing sleeve 102 are respectively provided with two bosses with bolt holes, and the front fixing sleeve 101 and the rear fixing sleeve 102 are connected by bolts.

[0025] Preferably, during assembly, the position of the rear fixing sleeve 102 is first determined so that the groove 6 on the rear fixing sleeve 102 is on the same vertical plane as the hook part of the hook. Then, the fixing sleeve is welded to the hook. After that, the front fixing sleeve 101 is fixed to the rear fixing sleeve 102 with bolts and then welded to the hook.

[0026] Preferably, the front fixing sleeve 101 and the rear fixing sleeve 102 can be machined directly on the hook during manufacturing, reducing the number of installation and connection bolts.

[0027] Furthermore, the rotating part 2 includes: a front rotating sleeve 201 and a rear rotating sleeve 202 fixedly connected to the front rotating part 2; the front rotating sleeve 201 and the rear rotating sleeve 202 are combined to form a complete annular structure.

[0028] Preferably, the front rotating sleeve 201 and the rear rotating sleeve 202 are each provided with two bosses with bolt holes, and the front rotating sleeve 201 and the rear rotating sleeve 202 are connected by bolts.

[0029] Furthermore, the annular structure formed by the front rotating sleeve 201 and the rear rotating sleeve 202 is clearance-fitted with the annular structure formed by the front fixed sleeve 101 and the rear fixed sleeve 102.

[0030] Furthermore, annular grooves 103 are provided on the outer sides of the front fixed sleeve 101 and the rear fixed sleeve 102, and annular sliders 203 are provided on the inner sides of the front rotating sleeve 201 and the rear rotating sleeve 202; the annular sliders 203 are rotatably disposed in the annular grooves 103 to restrict the axial movement between the front fixed sleeve 101, the rear fixed sleeve 102 and the front rotating sleeve 201, the rear rotating sleeve 202.

[0031] Preferably, during assembly, the front rotating sleeve 201 and the rear rotating sleeve 202 are fastened to the outside of the front fixed sleeve 101 and the rear fixed sleeve 102, so that the annular slider 203 is embedded in the annular groove 103. Then, the front rotating sleeve 201 and the rear rotating sleeve 202 are connected with bolts to ensure that the front rotating sleeve 201 and the rear rotating sleeve 202 rotate smoothly outside the front fixed sleeve 101 and the rear fixed sleeve 102.

[0032] Furthermore, the first reset member 4 is specifically a torsion spring. The top of the front fixed sleeve 101 and the rear fixed sleeve 102 is provided with a first annular boss 104, and the top of the front rotating sleeve 201 and the rear rotating sleeve 202 is provided with a second annular boss 204. The first reset member 4 is sleeved on the outside of the front fixed sleeve 101 and the rear fixed sleeve 102, and the first reset member 4 is located between the first annular boss 104 and the second annular boss 204. One end of the first reset member 4 is fixedly connected to the first annular boss 104, and the other end of the first reset member 4 is fixedly connected to the second annular boss 204. When the anti-disengagement baffle 3 is facing the hook opening, the first reset member 4 is in a tensioned state. Under the action of the elastic force of the first reset member 4, the anti-disengagement baffle 3 automatically turns to one side of the hook to open the hook opening.

[0033] Furthermore, the rear rotating sleeve 202 is provided with two locking bosses 205 with holes, and a pin 206 is provided inside the locking boss 205. An eccentric lock 5 is rotatably connected to the pin 206. A rectangular through hole 207 is provided at the position where the locking bosses 205 are provided on the rear rotating sleeve 202. The rectangular through hole 207 is used to avoid the eccentric lock 5.

[0034] Preferably, the pin 206 is provided with a pin to prevent the pin 206 from dislodging from the locking boss 205.

[0035] Furthermore, the second reset element 7 is specifically a torsion spring. The second reset element 7 is sleeved on the outside of the pin 206. One end of the second reset element 7 is fixedly connected to the rear rotating sleeve 202, and the other end of the second reset element 7 is fixedly connected to the eccentric lock 5. The eccentric lock 5 is always in a tensioned state. When the groove 6 is not directly aligned with the eccentric lock 5, the eccentric lock 5 is always tightly attached to the outer surfaces of the rear fixing sleeve 102 and the front fixing sleeve 101 under the action of elastic force. When the groove 6 is directly aligned with the eccentric lock 5, the eccentric lock 5 automatically embeds into the groove 6 under the action of elastic force to fix the position of the anti-disengagement baffle 3.

[0036] Preferably, the eccentric lock 5 is provided with a pull ring to facilitate the rotation of the eccentric lock 5.

[0037] In this embodiment, the working principle and usage process of the device are as follows: When the hook is in a normal state, the anti-disengagement baffle 3 is directly opposite the hook opening. At this time, the groove 6 on the fixing part 1 is aligned with the eccentric lock 5. Under the elastic force of the second reset part 7, the eccentric lock 5 is held in the groove 6, locking the rotating part 2. The anti-disengagement baffle 3 remains in a closed state to prevent the lifting device from accidentally disengaging.

[0038] When it is necessary to hang or remove the lifting device, the operator only needs to pull the pull ring on the eccentric lock 5 with one hand, so that the eccentric lock 5 overcomes the elastic force of the second reset piece 7 and disengages from the groove 6. Under the action of the elastic force of the first reset piece 4, the rotating part 2 rotates rapidly around the central axis of the fixed part 1, causing the anti-disengagement baffle 3 to rotate away from the hook opening, the hook is fully open, and the lifting device can be smoothly hung or removed.

[0039] After hooking is completed, the operator pushes the rotating part 2 back in the opposite direction so that the anti-disengagement baffle 3 is aligned with the hook opening again (this process also allows the first reset part 4 to accumulate power). When the groove 6 is aligned with the eccentric lock 5 again, the eccentric lock 5 automatically springs into the groove 6 under the action of the torsion spring, the rotating part 2 is re-locked, and the anti-disengagement baffle 3 is restored to its closed state, thus completing the entire operation.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hook anti-disengagement device with an eccentric locking buckle and rotatable mechanism, characterized in that, include: The anti-detachment component includes: a fixed part (1) fixedly connected to an external hook, and a rotating part (2) rotatably connected to the fixed part (1); an anti-detachment baffle (3) is provided on the rotating part (2), and the anti-detachment baffle (3) is used to close the hook opening; a first reset member (4) is connected between the rotating part (2) and the fixed part (1). The fixing component includes: an eccentric lock (5) rotatably disposed on the rotating part (2) and a groove (6) disposed on the fixing part (1); the groove (6) is used to lock the eccentric lock (5) so that the rotating part (2) does not rotate; a second reset member (7) is disposed between the eccentric lock (5) and the rotating part (2); Under the action of external force, the eccentric lock (5) is rotated and disengaged from the groove (6). The rotating part (2) rotates around the central axis of the fixed part (1) under the drive of the first reset part (4), thereby causing the anti-disengagement baffle (3) to avoid the hook opening. Under the action of external force, the rotating part (2) is rotated so that the anti-disengagement baffle (3) is facing the hook opening and the groove (6) is facing the eccentric lock (5). The eccentric lock (5) rotates under the drive of the second reset part (7) and automatically locks into the groove (6).

2. The anti-disengagement device for a rotatable hook with an eccentric locking buckle according to claim 1, characterized in that: The fixing part (1) includes: a front fixing sleeve (101) and a rear fixing sleeve (102) fixedly connected to the front fixing sleeve (101); the front fixing sleeve (101) and the rear fixing sleeve (102) are combined to form a complete ring structure.

3. The anti-disengagement device for a rotatable hook with an eccentric locking buckle according to claim 2, characterized in that: The rotating part (2) includes: a front rotating sleeve (201) and a rear rotating sleeve (202) fixedly connected to the front rotating part (2); the front rotating sleeve (201) and the rear rotating sleeve (202) are combined to form a complete ring structure.

4. The anti-disengagement device for a rotatable hook with an eccentric locking buckle according to claim 3, characterized in that: The annular structure composed of the front rotating sleeve (201) and the rear rotating sleeve (202) is clearance-fitted with the annular structure composed of the front fixed sleeve (101) and the rear fixed sleeve (102).

5. The anti-disengagement device for a rotatable hook with an eccentric locking buckle according to claim 4, characterized in that: An annular groove (103) is provided on the outer side of the front fixed sleeve (101) and the rear fixed sleeve (102), and an annular slider (203) is provided on the inner side of the front rotating sleeve (201) and the rear rotating sleeve (202); the annular slider (203) is rotatably disposed in the annular groove (103) to restrict the axial movement between the front fixed sleeve (101), the rear fixed sleeve (102) and the front rotating sleeve (201) and the rear rotating sleeve (202).

6. The anti-disengagement device for a rotatable hook with an eccentric locking buckle according to claim 5, characterized in that: The first reset component (4) is specifically a torsion spring. The top of the front fixed sleeve (101) and the rear fixed sleeve (102) is provided with a first annular boss (104), and the top of the front rotating sleeve (201) and the rear rotating sleeve (202) is provided with a second annular boss (204). The first reset component (4) is sleeved on the outside of the front fixed sleeve (101) and the rear fixed sleeve (102), and the first reset component (4) is located between the first annular boss (104) and the second annular boss (204). One end of the first reset component (4) is fixedly connected to the first annular boss (104), and the other end of the first reset component (4) is fixedly connected to the second annular boss (204). When the anti-disengagement baffle (3) is facing the hook opening, the first reset component (4) is in a tensioned state. Under the action of the elastic force of the first reset component (4), the anti-disengagement baffle (3) automatically turns to one side of the hook to open the hook opening.

7. A rotatable hook anti-disengagement device with an eccentric locking buckle according to claim 6, characterized in that: The rear rotating sleeve (202) is provided with two locking bosses (205) with holes. The locking bosses (205) are provided with pins (206) inside, and the pins (206) are rotatably connected to the eccentric lock (5). The rear rotating sleeve (202) is provided with a rectangular through hole (207) at the position where the locking bosses (205) are provided. The rectangular through hole (207) is used to avoid the eccentric lock (5).

8. A rotatable hook anti-disengagement device with an eccentric locking buckle according to claim 7, characterized in that: The second reset component (7) is a torsion spring. The second reset component (7) is sleeved on the outside of the pin (206). One end of the second reset component (7) is fixedly connected to the rear rotating sleeve (202), and the other end of the second reset component (7) is fixedly connected to the eccentric lock (5). The eccentric lock (5) is always in a tensioned state. When the groove (6) is not directly opposite the eccentric lock (5), the eccentric lock (5) is always tightly attached to the outer side of the rear fixed sleeve (102) and the front fixed sleeve (101) under the action of elastic force. When the groove (6) is directly opposite the eccentric lock (5), the eccentric lock (5) automatically embeds into the groove (6) under the action of elastic force to fix the position of the anti-disengagement baffle (3).

9. A rotatable hook anti-disengagement device with an eccentric locking buckle according to claim 8, characterized in that: The eccentric lock (5) is specifically a cuboid structure connected to an eccentric disk.

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