CN220245290U - Self-propelled trolley conveying device - Google Patents

Abstract

The utility model relates to a field that car production line carried especially relates to a dolly conveyor by oneself, it includes automobile body and hoist, automobile body fixedly connected with electric hoist, the automobile body is provided with the montant respectively in the both sides of electric hoist, be provided with the protection machanism that is used for preventing the lifting rope of electric hoist to rock between two montants, be provided with two gag lever posts between two montants, two montants are provided with the adjusting part that is used for driving two gag lever posts to opposite directions or move away from each other respectively, the spacing groove has all been seted up along vertical direction to one side that two gag lever posts are in opposite directions, the upper end of spacing groove is the opening setting, the upper end fixedly connected with supporting rod of hoist, the both ends of supporting rod are located two spacing grooves respectively and slide the adaptation along vertical direction and spacing groove, the lifting rope of electric hoist is connected with the supporting rod is removable. This application drives hoist through the supporting pole and rises or descend, utilizes two gag levers post to prevent that the supporting pole from rocking, has the effect that prevents that lifting rope and hoist from rocking, does benefit to the improvement production security.

Description

Self-propelled trolley conveying device

Technical Field

The application relates to the field of conveying of automobile production lines, in particular to a self-propelled trolley conveying device.

Background

The conveying process of the automobile production line is generally as follows: and placing the workpiece on a lifting appliance at the workpiece loading station, then driving the lifting appliance by the electric hoist to lift the workpiece into the air, then driving the electric hoist and the lifting appliance by the self-traveling trolley to transfer the workpiece to the workpiece unloading station, and finally driving the lifting appliance by the electric hoist to drop the workpiece to the ground for processing or workpiece unloading.

With respect to the related art in the above, the inventors consider that there are the following drawbacks: the lifting rope is fixedly connected with the lifting rope of the electric hoist, and the lifting rope are easy to shake in the process of driving the electric hoist to move by the self-propelled trolley, so that potential safety hazards exist.

Disclosure of Invention

In order to solve the problem that a lifting rope and a lifting appliance are easy to shake, the application provides a self-propelled trolley conveying device.

The application provides a self-propelled trolley conveying device adopts following technical scheme:

the utility model provides a self-propelled trolley conveying device, includes automobile body and hoist, automobile body fixedly connected with electric hoist, the automobile body in the both sides of electric hoist are provided with the montant respectively, two be provided with between the montant be used for preventing the protection machanism that the lifting rope of electric hoist rocked, two be provided with two gag lever posts between the montant, two the montant is provided with respectively and is used for driving two the gag lever post is opposite to or is opposite to the adjusting part that moves away from each other, two the spacing groove has all been seted up along vertical direction in one side that the gag lever post is opposite to each other, the upper end of spacing groove is the opening setting, the upper end fixedly connected with supporting pole of hoist, the both ends of supporting pole are located two respectively in the spacing inslot and along vertical direction with the adaptation of sliding of spacing groove, the lifting rope of electric hoist with the supporting pole is detachable.

Through adopting above-mentioned technical scheme, utilize adjusting part to further adjust the interval of two gag levers, put into two spacing inslot with the both ends of supporting pole respectively in the upper end department of two gag levers, and make the tip of supporting pole contradict with the diapire of spacing groove, after connecting the lifting rope of electric hoist with the supporting pole, electric hoist passes through supporting pole and drives hoist along vertical direction ascending or decline, utilize protection machanism to prevent that the lifting rope of electric hoist from rocking by a wide margin, through supporting pole and spacing groove slip adaptation, prevent that the supporting pole from rocking, realized preventing that lifting rope and hoist from rocking the effect, do benefit to hoist steadily to drive the work piece and remove; in addition, the lower ends of the two limiting grooves are closed, so that falling of the supporting rods and the lifting appliance is prevented, and production safety is further improved.

Optionally, the automobile body in the both sides of electric block are fixedly connected with installation pole respectively, the length direction of installation pole is followed the horizontal direction and is faced the electric block sets up, two the montant is followed two respectively the length direction of installation pole with installation pole sliding connection, the installation pole is provided with and is used for fixing the locking piece of montant.

Through adopting above-mentioned technical scheme, during installation hoist, along installation pole slip montant, utilize the locking piece to make montant and installation pole fixed to adjust the interval of two montants according to the length of bearing pole, utilize adjusting part to further adjust the interval of two gag lever posts afterwards, do benefit to the bearing pole of installing different length between two gag lever posts more effectively, be applicable to the hoist of different models, and do benefit to and improve installation effectiveness.

Optionally, the spout has been seted up to the installation pole, the opening area of spout is followed and is deviate from the direction of installation pole reduces gradually, two equal fixedly connected with slider of montant, two the slider is located two respectively in the spout, just the slider is along keeping away from or being close to the direction of electric block with the spout adaptation of sliding.

By adopting the technical scheme, the opening of the chute is gradually reduced along the direction deviating from the mounting rod, so that the sliding block can slide along the chute stably, and the position of the vertical rod can be adjusted conveniently.

Optionally, the locking piece sets up to first bolt, the installation pole run through offer a plurality of with the first screw of spout intercommunication, a plurality of first screw is followed the length direction interval setting of installation pole, the locking hole has been seted up to the slider, first bolt in one first screw department with installation pole threaded connection and peg graft in the locking hole.

Through adopting above-mentioned technical scheme, twist first bolt and move to leaving the locking hole, can follow spout slip slider smoothly, when two montants remove to the interval between two gag lever posts and approach the length of supporting pole, and the locking hole aligns with a first screw, twist first bolt and move to pegging graft in the locking hole, even make montant and installation pole fixed, realize being convenient for adjust the spaced effect of two montants.

Optionally, the adjusting part includes guide bar and screw rod, guide hole and second screw have been seted up in the montant run through, the guide bar with the guide hole adaptation that slides, the screw rod with second screw thread adaptation, the guide bar with the axial of screw rod with the length direction of installation pole is parallel to each other, the gag lever post with guide bar fixed connection, the screw rod with the gag lever post rotates to be connected, the screw rod is kept away from the one end fixedly connected with second handle of gag lever post.

Through adopting above-mentioned technical scheme, utilize the second handle to be convenient for twist the screw rod, the guide bar does benefit to and prevents that the gag lever post from following the screw rod and rotate, through screw rod and montant threaded connection, twist the screw rod and make it drive the gag lever post towards or deviate from the montant and remove, guide bar and guiding hole adaptation that slides do benefit to the gag lever post and remove steadily along the length direction of guide bar, through twisting two screws respectively, realize being convenient for adjust the spaced effect between two gag lever posts.

Optionally, the protection machanism includes two protection pieces, two semicircular arc wall has all been seted up to one side that the protection piece is in opposite directions, and the lifting rope is located two when drooping in nature between the arc wall, two the equal fixedly connected with movable rod of protection piece, the length direction of movable rod with the length direction of installation pole is parallel to each other, two the montant has all run through and has seted up the movable hole, two the movable rod wears to locate two respectively the movable hole and with the adaptation of sliding of movable hole, the movable rod is kept away from the one end fixedly connected with anticreep piece of protection piece, the montant is provided with and is used for fixing the fixed subassembly of movable rod.

Through adopting above-mentioned technical scheme, movable rod and movable hole adaptation that slides do benefit to the position of protection piece, and the anticreep piece does benefit to preventing that the movable rod breaks away from the montant, and when two protection pieces moved to mutual butt in opposite directions, and the lifting rope was located between two arc grooves, utilized fixed subassembly to fix two protection pieces, utilized two protection pieces to carry out spacingly to the lifting rope, does benefit to preventing that the lifting rope from rocking by a wide margin.

Optionally, the fixed subassembly includes fixed block and second bolt, the fixed block with montant fixed connection, second bolt screw thread wears to locate the fixed block and with movable rod butt, the movable rod is close to one side of second bolt is provided with the anti-skidding line.

Through adopting above-mentioned technical scheme, when the tip of second bolt left the movable rod, the movable rod can remove smoothly in the activity downthehole, twists the second bolt and makes it support tight movable rod, makes movable rod and montant fixed promptly to be convenient for fix two protection pieces.

Optionally, the middle part fixedly connected with link of supporting pole, the lower extreme fixedly connected with safety hook of the lifting rope of electric hoist, safety hook with the link articulates fixedly.

Through adopting above-mentioned technical scheme, with the safety hook of the lifting rope lower extreme of electric hoist on the link for the lifting rope and the supporting rod of electric hoist are fixed, so that electric hoist passes through the supporting rod and drives hoist along vertical ascending or decline.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the electric hoist drives the lifting appliance to ascend or descend along the vertical direction through the supporting rods, the two protection blocks are utilized to prevent the lifting rope from shaking greatly, the two limit rods are beneficial to preventing the supporting rods from shaking, the effect of preventing the lifting rope and the lifting appliance from shaking is realized, the lifting appliance is beneficial to stably driving the workpiece to move, the supporting rods and the lifting appliance are beneficial to preventing the lifting appliance from falling, and the production safety is improved;

2. the sliding block is slid along the sliding groove and fixed by the first bolt, so that the position of the vertical rod is convenient to adjust, the screw rod and the guide rod are utilized to conveniently adjust the position of the limiting rods, and the interval between the two vertical rods and the two limiting rods is respectively adjusted, so that the lifting device is beneficial to more efficiently installing supporting rods with different lengths between the two limiting rods, is suitable for lifting appliances with different models, and is beneficial to improving the installation efficiency;

3. the movable rod slides along the movable hole and is fixed by the second bolt, so that the position of the protective blocks is convenient to adjust, the two protective blocks are utilized to limit the lifting rope, the lifting rope is prevented from swinging greatly, a certain interval is reserved between the lifting rope and the groove wall of the arc-shaped groove, and the lifting rope can pass through the two arc-shaped grooves smoothly.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a cross-sectional view of the overall structure of an embodiment of the present application.

Reference numerals: 1. a vehicle body; 2. a lifting appliance; 3. an electric hoist; 4. a hanging rope; 5. a vertical rod; 6. a mounting rod; 7. a limit rod; 8. a limit groove; 9. a support rod; 10. hanging rings; 11. a safety hook; 12. a chute; 13. a slide block; 14. a first bolt; 15. a first screw hole; 16. a guide rod; 17. a screw; 18. a guide hole; 19. a second screw hole; 20. a protective block; 21. an arc-shaped groove; 22. a movable rod; 23. a movable hole; 24. an anti-falling block; 25. a fixed block; 26. a second bolt; 27. an anti-slip layer.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-2.

The embodiment of the application discloses a self-propelled trolley conveying device.

The utility model provides a self-propelled trolley conveyor, includes automobile body 1 and hoist 2, and automobile body 1 fixedly connected with electric hoist 3, automobile body 1 are provided with montant 5 in electric hoist 3's both sides respectively, and automobile body 1 is provided with installation pole 6 in electric hoist 3's both sides respectively fixedly connected with, and installation pole 6's length direction sets up towards electric hoist 3 along the horizontal direction, and two montants 5 are provided with the locking piece that is used for fixed montant 5 along the length direction and installation pole 6 sliding connection of two installation poles 6 respectively.

The protection mechanism for preventing the lifting rope 4 of the electric hoist 3 from shaking is arranged between the two vertical rods 5, two limiting rods 7 are arranged between the two vertical rods 5, the two vertical rods 5 and the two limiting rods 7 are symmetrically arranged on the vertical symmetry plane of the naturally-drooping lifting rope 4, the two vertical rods 5 are respectively provided with an adjusting component for driving the two limiting rods 7 to move oppositely or reversely, and limiting grooves 8 are formed in one sides of the two limiting rods 7 in opposite directions along the vertical direction.

The upper ends of the limit grooves 8 are provided with openings, the upper ends of the lifting appliance 2 are fixedly connected with bearing rods 9, and the two ends of the bearing rods 9 in the length direction are respectively positioned in the two limit grooves 8 and are in sliding fit with the limit grooves 8 along the vertical direction; the lifting rope 4 of the electric hoist 3 is detachably connected with the supporting rod 9, a hanging ring 10 is fixedly connected to the middle of the supporting rod 9, a safety hook 11 is fixedly connected to the lower end of the lifting rope 4 of the electric hoist 3, and the safety hook 11 is fixedly connected with the hanging ring 10 in a hanging mode.

When the lifting appliance 2 is installed, the vertical rods 5 slide along the installation rods 6, the vertical rods 5 are fixed with the installation rods 6 by utilizing the locking pieces, so that the interval between the two vertical rods 5 is adjusted according to the length of the supporting rods 9, then the interval between the two limiting rods 7 is further adjusted by utilizing the adjusting assembly, two ends of the supporting rods 9 are respectively placed into the two limiting grooves 8 at the upper ends of the two limiting rods 7, and the ends of the supporting rods 9 are abutted against the bottom walls of the limiting grooves 8; through adjusting the interval of two montants 5 and two gag lever posts 7 respectively, do benefit to the bearing pole 9 of installing different length between two gag lever posts 7 more effectively, be applicable to hoist 2 of different models, and do benefit to and improve installation effectiveness.

The safety hook 11 at the lower end of the lifting rope 4 of the electric hoist 3 is hooked on the hanging ring 10, so that the lifting rope 4 of the electric hoist 3 is fixed with the supporting rod 9, the electric hoist 3 drives the lifting appliance 2 to ascend or descend along the vertical direction through the supporting rod 9, and the lifting rope 4 of the electric hoist 3 is prevented from shaking greatly by the protection mechanism; two ends of the supporting rod 9 are respectively positioned in the two limit grooves 8 in the lifting process, and the supporting rod 9 is prevented from shaking through sliding fit of the supporting rod 9 and the limit grooves 8, so that the effect of preventing the lifting rope 4 and the lifting appliance 2 from shaking is realized, and the lifting appliance 2 is beneficial to stably driving a workpiece to move; in addition, the lower ends of the two limiting grooves 8 are closed, so that falling of the supporting rods 9 and the lifting appliance 2 is prevented, and production safety is further improved.

In order to be convenient for adjust the interval of two montants 5, spout 12 has been seted up along its length direction to the downside department of installation pole 6, and the one end that the electric hoist 3 was kept away from to the spout 12 is the opening setting, and the opening area of spout 12 reduces gradually along the direction that deviates from installation pole 6, and two equal fixedly connected with sliders 13 of montant 5, two sliders 13 are located two spouts 12 respectively, and slider 13 is along keeping away from or be close to the direction and the spout 12 slip adaptation of electric hoist 3.

The locking piece is set to be first bolt 14, and installation pole 6 runs through and has seted up a plurality of first screw holes 15 that communicate with spout 12, and a plurality of first screw holes 15 are equidistant to be set up along the length direction of installation pole 6, and the locking hole has been seted up to slider 13, and first bolt 14 is in a first screw hole 15 department and installation pole 6 threaded connection and peg graft in the locking hole (not shown in the figure), and the head fixedly connected with first handle of first bolt 14.

Utilize first handle to be convenient for twist first bolt 14, twist first bolt 14 to leave the locking hole, can follow spout 12 slip slider 13 smoothly to adjust the position of montant 5, when two montants 5 remove to the interval between two gag lever posts 7 approach the length of supporting pole 9, and the locking hole aligns with a first screw 15, twist first bolt 14 to peg graft in the locking hole, make montant 5 and installation pole 6 fixed, realize the effect of being convenient for adjust the interval of two montants 5.

For the interval of being convenient for adjust two gag lever posts 7, adjusting part includes guide bar 16 and screw rod 17, and guide hole 18 and second screw 19 have been seted up in montant 5 run through, and guide bar 16 and guide hole 18 slip adaptation, screw rod 17 and second screw 19 screw thread adaptation, the axial of guide bar 16 and screw rod 17 are parallel to each other with the length direction of installation pole 6, gag lever post 7 and guide bar 16 fixed connection, and screw rod 17 and gag lever post 7 rotate to be connected, and the one end fixedly connected with second handle of gag lever post 7 is kept away from to screw rod 17.

Utilize the second handle to be convenient for twist screw rod 17, guide bar 16 do benefit to and prevent that gag lever post 7 from following screw rod 17 and rotating, through screw rod 17 and montant 5 threaded connection, twist screw rod 17 makes it drive gag lever post 7 towards or deviate from montant 5 and remove, guide bar 16 and guiding hole 18 adaptation that slides do benefit to gag lever post 7 and remove steadily along the length direction of guide bar 16, through twisting two screw rods 17 respectively, realize being convenient for adjust the spaced effect between two gag lever posts 7.

In order to prevent the lifting rope 4 from shaking, the protection mechanism comprises two protection blocks 20, one sides of the two protection blocks 20 in opposite directions are provided with semicircular arc grooves 21, the lifting rope 4 is positioned in the arc grooves 21 between the two protection blocks 20 when naturally drooping, and the distance between the lifting rope 4 and the groove walls of the arc grooves 21 is 1-3 mm.

The rectangular movable rod 22 is fixedly connected to one side of the two protection blocks 20, which is away from each other, the length direction of the movable rod 22 is parallel to the length direction of the mounting rod 6, the movable holes 23 are formed in the two vertical rods 5 in a penetrating mode, the two movable rods 22 are respectively arranged in the two movable holes 23 in a penetrating mode and are matched with the movable holes 23 in a sliding mode, and the anti-falling blocks 24 are fixedly connected to one ends, away from the protection blocks 20, of the movable rods 22.

The montant 5 is provided with the fixed subassembly that is used for fixed movable rod 22, and the fixed subassembly includes fixed block 25 and second bolt 26, and fixed block 25 and montant 5 fixed connection, the tip fixedly connected with skid resistant course 27 of the screw thread end of second bolt 26, the skid resistant course 27 and the movable rod 22 butt of fixed block 25 and its tip are worn to locate to the second bolt 26 screw thread, and one side that movable rod 22 is close to second bolt 26 is provided with the skid resistant line, and the head fixedly connected with third handle of second bolt 26.

The second bolt 26 is convenient to screw by utilizing the third handle, when the end part of the second bolt 26 leaves the movable rod 22, the movable rod 22 can smoothly move in the movable hole 23, and when the two protection blocks 20 move to be mutually abutted, and the lifting rope 4 is positioned between the two arc-shaped grooves 21, the second bolt 26 is screwed to enable the anti-slip layer 27 to be abutted against the movable rod 22, namely the movable rod 22 is fixed with the vertical rod 5, so that the two protection blocks 20 are convenient to fix.

The two protection blocks 20 are utilized to limit the lifting rope 4, so that the lifting rope 4 is prevented from swinging greatly; a certain interval is reserved between the hanging rope 4 and the groove wall of the arc-shaped groove 21, so that the hanging rope 4 can smoothly pass through the two arc-shaped grooves 21; when the two protection blocks 20 are far away from each other, the lifting rope 4 is convenient to be overhauled smoothly.

The implementation principle of the self-propelled trolley conveying device in the embodiment of the application is as follows:

the two protection blocks 20 are fixed on the periphery side of the lifting rope 4, so that the lifting rope 4 naturally sags and is positioned in the arc-shaped groove 21 between the two protection blocks 20; sliding the vertical rods 5 along the mounting rod 6, sliding the two vertical rods 5 until the interval between the two limiting rods 7 approaches the length of the supporting rod 9, and fixing the vertical rods 5 and the mounting rod 6 by using a first bolt 14; then the two screws 17 are screwed to adjust the position of the limiting rod 7, so that the supporting rod 9 can smoothly slide into the two limiting grooves 8 along the vertical direction, and the end part of the supporting rod 9 is abutted against the bottom wall of the limiting groove 8.

The safety hook 11 at the lower end of the lifting rope 4 of the electric hoist 3 is hooked on the hanging ring 10, the electric hoist 3 drives the lifting appliance 2 to ascend or descend along the vertical direction through the supporting rods 9, the lifting rope 4 is prevented from shaking greatly by utilizing the two protection blocks 20, the supporting rods 9 are prevented from shaking through sliding fit of the supporting rods 9 and the limiting grooves 8, the effect of preventing the lifting rope 4 and the lifting appliance 2 from shaking is achieved, the lifting appliance 2 is facilitated to stably drive a workpiece to move, and the supporting rods 9 and the lifting appliance 2 are prevented from falling.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. A self-propelled trolley conveying device, characterized in that: including automobile body (1) and hoist (2), automobile body (1) fixedly connected with electric hoist (3), automobile body (1) in both sides of electric hoist (3) are provided with montant (5) respectively, two be provided with between montant (5) be used for preventing protection machanism that lifting rope (4) of electric hoist (3) rocked, two be provided with two gag lever post (7) between montant (5), two montant (5) are provided with respectively and are used for driving two gag lever post (7) are opposite directions or are separated from each other and remove adjusting part, two spacing groove (8) have all been seted up along vertical direction in one side that gag lever post (7) are opposite directions, the upper end of spacing groove (8) is the opening setting, the upper end fixedly connected with supporting rod (9) of hoist (2), the both ends of supporting rod (9) are located two respectively spacing groove (8) just follow vertical direction with spacing groove (8) slip adaptation, the lifting rope (4) of electric hoist (3) are detachable with supporting rod (9).

2. The self-propelled trolley conveying apparatus as claimed in claim 1, wherein: the electric hoist is characterized in that the car body (1) is fixedly connected with mounting rods (6) on two sides of the electric hoist (3) respectively, the length direction of the mounting rods (6) faces the electric hoist (3) along the horizontal direction, two vertical rods (5) are arranged along the length direction of the two mounting rods (6) and are in sliding connection with the mounting rods (6) respectively, and the mounting rods (6) are provided with locking pieces for fixing the vertical rods (5).

3. The self-propelled trolley conveying apparatus as claimed in claim 2, wherein: the utility model discloses a power hoist, including installation pole (6), spout (12) have been seted up to installation pole (6), the opening area of spout (12) is followed and is deviate from the direction of installation pole (6) reduces gradually, two equal fixedly connected with slider (13) of montant (5), two slider (13) are located two respectively in spout (12), just slider (13) are along keeping away from or being close to the direction of electric hoist (3) with spout (12) adaptation of sliding.

4. A self-propelled trolley conveying apparatus as claimed in claim 3, wherein: the locking piece is arranged to be a first bolt (14), a plurality of first screw holes (15) communicated with the sliding groove (12) are formed in the installation rod (6) in a penetrating mode, the first screw holes (15) are formed in the installation rod (6) at intervals in the length direction, the sliding block (13) is provided with a locking hole, and the first bolt (14) is in threaded connection with the installation rod (6) at the first screw hole (15) and is inserted into the locking hole.

5. The self-propelled trolley conveying apparatus as claimed in claim 2, wherein: the adjusting component comprises a guide rod (16) and a screw rod (17), wherein the vertical rod (5) is provided with a guide hole (18) and a second screw hole (19) in a penetrating mode, the guide rod (16) is matched with the guide hole (18) in a sliding mode, the screw rod (17) is matched with the second screw hole (19) in a threaded mode, the axial direction of the guide rod (16) and the axial direction of the screw rod (17) are parallel to the length direction of the mounting rod (6), the limiting rod (7) is fixedly connected with the guide rod (16), the screw rod (17) is connected with the limiting rod (7) in a rotating mode, and one end of the screw rod (17) away from the limiting rod (7) is fixedly connected with a second handle.

6. The self-propelled trolley conveying apparatus as claimed in claim 2, wherein: the protection mechanism comprises two protection blocks (20), semicircular arc-shaped grooves (21) are formed in opposite sides of the protection blocks (20), the lifting ropes (4) are located between the two arc-shaped grooves (21) when naturally drooping, the two protection blocks (20) are fixedly connected with movable rods (22), the length directions of the movable rods (22) are parallel to the length directions of the mounting rods (6), the two vertical rods (5) penetrate through the movable holes (23), the two movable rods (22) penetrate through the two movable holes (23) respectively and are matched with the movable holes (23) in a sliding mode, the movable rods (22) are far away from one end of each protection block (20) and fixedly connected with anti-falling blocks (24), and the fixing assemblies used for fixing the movable rods (22) are arranged on the vertical rods (5).

7. The self-propelled trolley conveying apparatus as claimed in claim 6, wherein: the fixing assembly comprises a fixing block (25) and a second bolt (26), the fixing block (25) is fixedly connected with the vertical rod (5), the second bolt (26) is threaded through the fixing block (25) and is abutted to the movable rod (22), and anti-skid patterns are formed on one side, close to the second bolt (26), of the movable rod (22).

8. The self-propelled trolley conveying apparatus as claimed in claim 1, wherein: the middle of the supporting rod (9) is fixedly connected with a hanging ring (10), the lower end of the hanging rope (4) of the electric hoist (3) is fixedly connected with a safety hook (11), and the safety hook (11) is fixedly connected with the hanging ring (10) in a hanging mode.