Automatic connection type lifting appliance

Abstract

The utility model discloses an automatic connection type lifting appliance which comprises a shell, a main hook, an auxiliary hook and a lock cylinder shaft, wherein the main hook and the auxiliary hook are rotationally connected with the left side and the right side of the shell, the lock cylinder shaft is connected to the shell in a sliding mode, the lock cylinder shaft is connected with a reset tension spring, a handle is rotationally connected outside the shell, and the front half section of the handle is inserted into the lower portion of the lock cylinder shaft. According to the automatic hanging device, automatic hanging connection of the heavy object and the lifting appliance can be achieved, and meanwhile, after the lifting appliance and the heavy object are hung, the hanging connection reliability and safety are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lifting appliance, especially an automatic connection type lifting appliance. BACKGROUND

[0002] The automatic connection type lifting appliance (hereinafter referred to as lifting appliance) is a connecting device between a lifting device and a hoisted heavy object. After the lifting appliance is connected with the heavy object, the lifting device is operated to move the heavy object. The lifting device and the lifting appliance have vertical rotation, lateral swing and other actions.

[0003] The lifting appliance of the lifting device for moving a platform car disclosed in the patent application with the publication number CN110642142A has a main hook and a vice hook which are rotatably installed on a shell. The vice hook has a protrusion at the bottom, and the main hook has a groove at the bottom. When the main hook and the vice hook embrace the heavy object pin shaft, the protrusion is inserted into the groove to limit the rotation of the vice hook. The main hook has a crank arm at the top. The crank arm can be driven by the handle to flip over the top of the main hook. When the crank arm is between the main hook and the vice hook, the rotation freedom of the main hook is limited. When the crank arm passes over the top of the main hook and reaches the back of the main hook, the main hook rotates and releases the vice hook, thereby releasing the heavy object. The crank arm is connected with a guide rod. The handle is rotated to drive the guide rod to slide along the horizontal guide rail, thereby driving the crank arm to move. In the lifting process of the lifting appliance of the scheme, vibration can easily cause the handle to swing, thereby causing the guide rod to shift. The locking between the stop block at the top of the main hook and the guide pin is released in advance. The heavy object is unhooked, and the safety is low. UTILITY MODEL CONTENT

[0004] The utility model aims to provide an automatic connection type lifting appliance to solve the problem of reliable connection between the heavy object and the lifting appliance after automatic hooking and improve the safety.

[0005] Technical scheme: The utility model discloses an automatic connection type lifting appliance which comprises a shell, a main hook and a vice hook rotatably connected to the left and right sides of the shell, a lock core shaft slidably connected to the shell, and a reset tension spring connected to the lock core shaft. A handle is rotatably connected to the outside of the shell. The front half of the handle is inserted below the lock core shaft. When the lifting appliance is unhooked from the heavy object, the front half of the handle pushes the lock core shaft away from the main hook.

[0006] Preferably, the lock core shaft penetrates the front and rear walls of the shell. The front and rear outer walls of the shell are provided with rotatable handles. The rear halves of the handles on the front and rear sides of the shell are connected to form a holding part.

[0007] Preferably, the two ends of the lock core shaft extending out of the shell are provided with limiting grooves, and the front half of the handle is inserted into the limiting grooves.

[0008] Preferably, the two ends of the lock core shaft extending out of the shell are provided with lugs. The front and rear outer walls of the shell are respectively provided with brackets. The two ends of the reset tension spring are respectively connected with the lugs and the brackets. The handle is located between the reset tension spring and the shell.

[0009] Preferably, in order to solve the problem that the length of the top of the main hook is limited by the sub-hook providing a space for the main hook, an opening cavity is arranged on the inner side of the main hook, and the sub-hook is at least partially inserted into the opening cavity when the lifting appliance is connected with or disconnected from the heavy object.

[0010] Preferably, in order to ensure that the lock shaft can be reset smoothly, the end of the lock shaft extending out of the shell and the front half of the handle are connected through a flexible connecting piece.

[0011] Preferably, a side branch is arranged on the middle of the inner side of the main hook and the sub-hook respectively, and an inclined surface is arranged on the top of the outer side of the main hook, so that when the lifting appliance is connected with the heavy object, the heavy object pushes the main hook and the sub-hook to rotate through the side branches, and the main hook pushes the lock shaft to slide through the inclined surface.

[0012] Preferably, a long hole is arranged on the shell, the lock shaft is slidably connected with the shell through the long hole, the long hole is parallel to the center line of the shell, and the bracket is located on the outer side of the rotation shaft of the main hook.

[0013] Preferably, a center shaft is arranged on the top of the shell, and the center shaft is sleeved in the cross beam.

[0014] Preferably, a bearing and a bearing cover are arranged on the top of the center shaft for preventing the center shaft from sliding out of the cross beam, and flanges are arranged on the two sides of the cross beam.

[0015] Preferably, an arc-shaped hole is arranged on the base of the center shaft for limiting the rotation angle of the shell relative to the lifting device.

[0016] Advantages: Compared with the prior art, the utility model has the following advantages: 1. The connection between the heavy object and the lifting appliance after automatic connection is safe and reliable: the unlocking mode is changed to lever type direct driving, so that the unlocking structure is prevented from being unlocked in advance due to vibration during the connection process, and the heavy object is prevented from being unhooked; 2. Effective locking: the structure of the main hook is changed, a groove is arranged on the inner side of the main hook, when being connected, the bottom of the sub-hook is inserted into the groove, the overlapping area of the bottom of the sub-hook and the main hook is increased, after being disconnected, the top of the sub-hook is inserted into the inside of the main hook, the main hook avoids the sub-hook, the length and width of the top of the main hook are increased, and the locking effectiveness can be ensured; 3. Stable unlocking and convenient assembly: the handle is clamped on the two sides of the outer side of the shell, and the two ends of the lock shaft are pushed at the same time, the lock shaft is stably unlocked, and the reset spring is located on the outer side of the shell, so that the assembly and maintenance are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an exploded view of the automatic lifting appliance connection structure;

[0018] Figure 2 It is a main view of the automatic lifting appliance connection structure in the connected state;

[0019] Figure 3Front view of the automatic connecting sling structure in the hanging state;

[0020] Figure 4 Side view of the automatic connecting sling structure;

[0021] Figure 5 Structure diagram of the automatic connecting sling structure in the beginning of the disconnection state;

[0022] Figure 6 Cross-sectional view of Figure 5 ;

[0023] Figure 7 Structure diagram of the automatic connecting sling structure in the complete disconnection state;

[0024] Figure 8 Top view of the lock core shaft structure;

[0025] Figure 9 Top view of the central shaft. DETAILED DESCRIPTION

[0026] The technical scheme of the utility model will be further described below with reference to the drawings.

[0027] As Figures 1 to 4 , the automatic connecting sling comprises a shell 13, a main hook 11 and a secondary hook 12 which are rotationally connected to the left and right sides of the shell 13, and a lock core shaft 6 which is slidingly connected to the shell 13, and the lock core shaft 6 is connected with a return tension spring 7.

[0028] The shell 13 is provided with a long hole on the front and rear sides, and the lock core shaft 6 is located in the long hole and is slidingly connected to the shell 13, the long hole can be parallel to the center line of the shell 13 or can be at an angle, and it is better to be parallel; the shell 13 is rotationally connected with a handle 10 outside, the front half of the handle 10 is inserted below the lock core shaft 6, when the sling is disconnected from the weight, the rear half of the handle 10 is pressed down, and the front half of the handle 10 pushes the lock core shaft 10 away from the main hook 11 to release the restriction of the lock core shaft on the main hook 11.

[0029] As Figure 8 , the main body of the lock core shaft 6 is a cylindrical rod which penetrates through the front and rear side walls / panels of the shell 13, and the shell 13 is rotationally connected with the handle 10 outside the front and rear outer walls corresponding to the lock core shaft 6, in order to balance the lock core shaft 6, the rear half of the handle 10 located on the front and rear sides of the shell 13 is connected, forming a handle holding part, at this time, the handle 10 is U-shaped and clamped between the front and rear sides of the shell 13, and the structure of the rear half of the handle 10 and the holding part is not limited.

[0030] The lock cylinder shaft 6 extends out of the two ends of the shell and is provided with a limiting groove. The front half of the handle 10 extends into the limiting groove, which is used to prevent the lock cylinder shaft 6 from moving forward and backward. The two ends of the lock cylinder shaft 6 extending out of the shell are also provided with a supporting lug, and the supporting lug is provided with a connecting hole. The shell 13 is provided with a bracket 9 on the front and rear outer walls, respectively. The two ends of the reset tension spring 7 are connected to the supporting lug and the bracket 9, respectively. The handle 10 is located between the reset tension spring 7 and the shell 13. The bracket 9 is located on the outer side of the rotating shaft of the main hook 10. Under the limitation of the long hole, the limiting groove, the handle 10, and the reset spring 7, the lock cylinder shaft 6 cannot move forward and backward, but can only slide up and down along the long hole under the drive of the reset spring 7 and the handle 10. A connecting piece (not shown) is arranged between the end of the lock cylinder shaft 6 extending out of the shell and the front half of the handle 10. The connecting piece is used to drive the lock cylinder shaft 6 to reset and cooperate with the reset spring 7 to drive the lock cylinder shaft 6 to reset, thereby improving the reset tension. The connecting piece can be a flexible piece or a hinged piece such as a connecting ring or a steel rope. The connecting ring is sleeved on the end of the lock cylinder shaft 6 extending out and the front half of the handle 10. One end of the steel rope is connected to the supporting lug, and the other end is sleeved or wound on the front half of the handle 10.

[0031] As shown in Figure 3 , Figure 6 , Figure 7 , the inner side of the main hook 11 is provided with an open cavity. The open cavity can be L-shaped or other structures. When the weight is connected or disconnected with the lifting tool, the auxiliary hook 12 is extended into the cavity from the opening. When connected, the bottom of the auxiliary hook 12 is extended into the groove of the main hook 11, and the rotational freedom of the auxiliary hook 12 is limited. When disconnected, the side branch and / or top of the auxiliary hook 12 is extended into the groove of the main hook 11, and the main hook 11 provides a space for the auxiliary hook 12 to avoid interference between the top of the main hook 11 and the auxiliary hook 12. At the same time, the length and width of the top of the main hook 11 can be increased to improve the locking reliability. The inner side of the main hook 11 and the auxiliary hook 12 is respectively provided with a side branch. The outer top of the main hook 11 is provided with an inclined surface. When the weight is connected with the lifting tool, the weight pushes the main hook 11 and the auxiliary hook 12 to rotate through the side branch, and the main hook 11 pushes the lock cylinder shaft 6 to slide through the inclined surface.

[0032] The shell 13 is provided with a central shaft 5 at the top. The central shaft 5 is sleeved in the cross beam 3. The top of the central shaft 5 is provided with a bearing 2 and a bearing cover 1 to prevent the central shaft 5 from slipping out of the cross beam 3. The cross beam 3 is connected with a flange 4 on both sides. The central shaft 5 can rotate relative to the cross beam 3. Figure 9 The bottom of the central shaft 5 is provided with an arc-shaped hole for limiting the rotating angle of the lifting tool relative to the cross beam.

[0033] When assembled, the main and auxiliary hooks 11, 12 are respectively installed through the pin shaft and the pin shaft hole of the shell 13, and under the driving of gravity or external force, the main hook 11 and the auxiliary hook 12 can rotate in the shell 13; the bracket 8 is welded on the front and rear sides of the shell 13, and the middle part of the handle 10 is connected with the bracket 8 through a pin and can rotate around the pin; the lock core shaft 6 is located in the long hole on the shell 13 and penetrates the shell 13 from front to back, and due to the lever action, the front half of the handle 10 is placed in the limiting groove at the bottom of the two ends of the lock core shaft 6, thereby limiting the forward and backward movement of the lock core shaft 6. The bracket 9 is welded on the shell 13, one end of the tension spring 7 is connected with the bracket 9, and the other end is connected with the ears at the two ends of the lock core shaft 6.

[0034] When the lifting appliance is hung with the heavy object, like Figure 7 , Figure 6 , Figure 5 , the lifting device is operated to drop the arm, so that the automatic connection type lifting appliance gradually descends to contact the heavy object hoisting shaft 14, and with the descent of the lifting appliance, the side supports of the main hook 11 and the auxiliary hook 12 are pushed by the heavy object hoisting shaft 14, the main hook 11 and the auxiliary hook 12 rotate around the respective pin shafts, and at the same time, the top inclined surface of the main hook 11 pushes the lock core shaft 6 to move upward along the long hole against the tension of the reset tension spring 7; with the continuous descent of the lifting appliance, the bottom of the auxiliary hook 12 is inserted into the inner recess of the main hook 11, the lock core shaft 6 passes over the inclined surface of the main hook 11 and is located between the main hook 11 and the auxiliary hook 12, and under the action of the tension of the reset tension spring 7, like Figure 3 , the lock core shaft 6 falls to the top recess of the side support of the main hook 11, the main hook 11 is locked, and the connection of the lifting appliance with the heavy object is completed.

[0035] When the lifting appliance is disconnected with the heavy object, the lifting appliance is appropriately lifted to reserve the unlocking space of the main hook 11, a force is applied on the handle 10 to move the gripping end downward, the lock core shaft 6 moves upward along the long hole under the action of the handle 10, the main hook 11 rotates, the heavy object is released, the lock core shaft 6 is transferred from the inner side to the outer side of the main hook 11, and the lock core shaft 6 returns to the bottom of the long hole under the action of the tension spring 7.

[0036] When it is needed to limit the rotation angle of the lifting appliance relative to the lifting device, a limiting shaft can be welded on the lifting device, the shaft end of the limiting shaft is stretched into the arc-shaped hole provided on the outer side plate connected with the bottom base of the central shaft 5, so that the rotation angle of the lifting appliance relative to the lifting device can be limited, and when the rotation angle is not limited, the limiting shaft can be pulled out of the arc-shaped hole.

Claims

1. An automatic connection type lifting tool, comprising a shell (13), a main hook (11) and a secondary hook (12) which are rotationally connected on the left and right sides of the shell (13), a lock core shaft (6) which is slidingly connected on the shell (13), and a reset tension spring (7) which is connected to the lock core shaft (6), characterized in that, The shell (13) is externally connected with a handle (10), the front half of the handle (10) is inserted below the lock core shaft (6), when the lifting appliance is disconnected with the heavy object, the front half of the handle (10) pushes the lock core shaft (6) away from the main hook (11).

2. The automatic connecting spreader according to claim 1, characterized in that, The lock core shaft (6) penetrates the front and rear walls of the shell (13), the front and rear outer walls of the shell (13) are correspondingly provided with the rotationally connected handle (10), the rear halves of the handles (10) located at the front and rear sides of the shell are connected, and a holding part is formed.

3. The automatic attachable sling according to claim 2, wherein The two ends of the lock core shaft (6) extending out of the shell (13) are provided with limiting grooves, and the front half of the handle (10) is inserted into the limiting grooves.

4. The automatic attachable sling according to claim 3, wherein The two ends of the lock core shaft (6) extending out of the shell (13) are provided with supporting ears, the front and rear outer walls of the shell (13) are respectively provided with supports (9), and the two ends of the reset tension spring (7) are respectively connected with the supporting ears and the supports (9), and the handle (10) is located between the reset tension spring (7) and the shell (13).

5. The self-connecting sling of any one of claims 1 to 4, wherein, The inner side of the main hook (11) is provided with an open cavity, when the lifting appliance is connected or disconnected with the heavy object, the auxiliary hook (12) is at least partially inserted into the open cavity.

6. The automatic attachable sling according to claim 2, wherein The end of the lock core shaft (6) extending out of the shell (13) and the front half of the handle (10) are connected through a flexible connecting piece.

7. The automatic attachable sling according to claim 5, wherein The middle parts of the inner sides of the main hook (11) and the auxiliary hook (12) are respectively provided with side supports, the outer top of the main hook (11) is provided with an inclined surface, when the lifting appliance is connected with the heavy object, the heavy object pushes the main hook (11) and the auxiliary hook (12) to rotate through the side supports, and the main hook (11) pushes the lock core shaft (6) to slide through the inclined surface.

8. The automatic attachable sling of claim 4, wherein, The shell (13) is provided with a long hole, the lock core shaft (6) is slidably connected with the shell (13) through the long hole, the long hole is parallel to the center line of the shell (13), and the support (9) is located on the outer side of the rotation shaft of the main hook (11).

9. The automatic attachable sling of claim 1, wherein, The top of the shell (13) is provided with a center shaft (5), the center shaft (5) is sleeved in the cross beam (3), the top of the center shaft (5) is provided with a bearing (2) and a bearing cover (1) for preventing the center shaft from slipping off the cross beam (3), and the two sides of the cross beam are provided with flanges (4).

10. The automatic attachable sling according to claim 9, wherein The bottom of the center shaft (5) is provided with an arc-shaped hole for limiting the rotation angle of the shell (13) relative to the hoisting device.

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