CN110902592B

CN110902592B - Electric chain hoist

Info

Publication number: CN110902592B
Application number: CN201911122279.XA
Authority: CN
Inventors: 郁正叶; 季丽萍; 田玉麟; 郁程
Original assignee: Changshu Seagull Crane & Hoist
Current assignee: Changshu Seagull Crane & Hoist
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2021-08-24
Anticipated expiration: 2039-11-15
Also published as: CN110902592A

Abstract

The invention discloses an electric chain block, which relates to the technical field of chain blocks, and adopts the technical scheme that the electric chain block comprises a box body, a partition plate, a second speed reducing wheel, an installation through hole, an internal threaded pipe, a second rotating shaft and a chain wheel fixed on the peripheral surface of the second rotating shaft; the peripheral surface of the chain wheel is sleeved with a transmission chain, and a fixed cylinder is fixed at the end part of the transmission chain; a driving device for driving the box body to move along the axial direction of the supporting rod is arranged in the box body; a braking device for preventing the rotation of the internal thread pipe is arranged between the internal thread pipe and the fixed column body; a square through hole is formed in one side, close to the internal threaded pipe, of the second speed reducing wheel, and a square shaft is arranged in the square through hole in a sliding mode along the axial direction of the second speed reducing wheel; a first threaded shaft is fixed at one end of the square shaft close to the internal threaded pipe and is in threaded connection with the internal threaded pipe. The invention solves the problem that the balance of the chain block is influenced by the overhigh lifting position of the lifting hook, and reduces the possibility that the balance of the chain block is influenced by the overhigh lifting hook.

Description

Electric chain hoist

Technical Field

The invention relates to the technical field of chain hoists, in particular to an electric chain hoist.

Background

At present, an electric chain hoist consists of an electric motor, a transmission mechanism and a chain wheel, and is suitable for hoisting heavy objects, loading and unloading work, maintaining equipment and hoisting goods.

The prior art can refer to Chinese invention patent with publication number CN205204703U, which discloses an electric chain block, comprising a chain block main body and a chain box fixed on a lifting point, and a chain component, the lifting point and an operating handle connected with the chain block main body. During operation, the operation handle is controlled, so that the motor in the chain block main body rotates clockwise or anticlockwise, the chain assembly is driven to move upwards or downwards through gear transmission, and the chain assembly is connected with a load to drive the load to ascend or descend.

However, the lifting of the lifting hook at the bottom of the chain block needs to be manually controlled, and the lifting hook is not convenient to observe at a low position due to manual work, so that the lifting position of the lifting hook is often too high. The too high balance that can influence the chain block of ring in lifting hook rising position, when lifting hook top and the contact of chain block bottom simultaneously, the motor still lasts the output to also can cause certain harm to the motor.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to provide an electric chain block, which reduces the possibility of influencing the balance of the chain block due to overhigh lifting of a lifting hook by arranging a braking device for preventing the lifting hook from lifting.

In order to achieve the purpose, the invention provides the following technical scheme:

an electric chain hoist comprises a box body, a partition plate fixed on the inner top surface of the box body, a second speed reducing wheel rotatably installed on one side, close to the first speed reducing wheel, of the partition plate, an installation through hole formed in one side, close to the second speed reducing wheel, of the partition plate, an internal thread pipe rotatably installed in the installation through hole, a second rotating shaft fixed on one side, far away from the second speed reducing wheel, of the internal thread pipe, and a chain wheel fixed on the outer peripheral surface of the second rotating shaft; the outer peripheral surface of the chain wheel is sleeved with a transmission chain, and a fixed cylinder is fixed at the end of the transmission chain; a driving device for driving the box body to move axially along the support rod is arranged in the box body; a braking device for preventing the rotation of the internal thread pipe is arranged between the internal thread pipe and the fixed column body; a square through hole is formed in one side, close to the internal threaded pipe, of the second reducing gear, and a square shaft is arranged in the square through hole in a sliding mode along the axial direction of the second reducing gear; a first threaded shaft is fixed at one end, close to the internal threaded pipe, of the square shaft, and the first threaded shaft is in threaded connection with the internal threaded pipe.

Through adopting above-mentioned technical scheme, the motor starts the back, and the motor drives first pivot and rotates, and first pivot drives the rotation of second deceleration wheel through first deceleration wheel, and the rotation of second deceleration wheel drive internal thread pipe through first screw shaft, and the internal thread pipe drives the sprocket through the second pivot and rotates, and the sprocket rotates the in-process and drives the lifting hook through the driving chain and rise. Through setting up internal thread pipe and first threaded shaft to make second reducing gear and sprocket be for dismantling to be connected, rise to appointed high back when the lifting hook, thereby stop the rotation of sprocket through the connection between disconnection second reducing gear and the sprocket, further prevent the lifting hook to continue to rise, reduce because the lifting hook rises the possibility of too high influence chain block overall balance nature.

The invention is further configured to: the braking device comprises an annular groove arranged on the periphery of the mounting through hole, a braking strip fixed on the peripheral surface of the internal threaded pipe, a strip-shaped sliding groove arranged on one side of the annular groove far away from the second speed reducing wheel, a barrier strip arranged in the strip-shaped sliding groove in a sliding manner along the axial direction of the annular groove and a pressing piece fixed on the top of the fixed cylinder; the brake strip is rotatably arranged in the annular groove along the circumferential direction of the annular groove; the inner sides of the pressing part and the blocking strip opposite to each other are respectively provided with an inclined plane.

By adopting the technical scheme, in the process that the fixed cylinder drives the lifting hook to move upwards, the pressing piece is contacted with the barrier strip, and the pressing piece pushes the barrier strip to move towards the inner side of the strip-shaped sliding groove through the inclined surface; when the barrier strip moves into the annular groove, the brake strip contacts with the barrier strip in the rotating process to stop rotating. At the moment, the second speed reducing wheel drives the first threaded shaft to continue rotating, and the first threaded shaft moves to one side far away from the chain wheel in the rotating process. Through setting up arresting gear, the lifting hook of being convenient for rises to appointed height after, promotes the blend stop through the pressing part and removes to prevent the internal thread pipe through the blend stop and rotate, further make sprocket and the separation of second reducing gear, thereby prevent that the lifting hook from continuing to rise.

The invention is further configured to: the stop strip is close to second deceleration wheel one side and is fixed with the spring, the bar spout is close to second deceleration wheel one side and has seted up the mounting groove, the spring be close to second deceleration wheel one end with the mounting groove is close to second deceleration wheel one side fixed connection.

By adopting the technical scheme, when the barrier strip moves into the annular groove, the spring is in a compressed state and applies elastic force close to one side of the chain wheel to the barrier strip, so that the barrier strip is driven to reset through the spring after the pressing piece is separated from the barrier strip.

The invention is further configured to: the mounting groove is close to second deceleration wheel one side and has seted up the direction through-hole, the blend stop is close to second deceleration wheel one side and is fixed with the guiding axle, the guiding axle slides along second deceleration wheel axial and sets up in the direction through-hole.

Through adopting above-mentioned technical scheme, the direction through-hole provides the guide effect for the guiding axle, reduces the blend stop along the deviating orbital possibility of second deceleration wheel axial displacement in-process.

The invention is further configured to: the driving device comprises a lead screw arranged in parallel with the supporting rod, a first fixed seat fixed on one side of the fixing piece close to the second speed reducing wheel, a first transmission wheel rotatably installed on one side of the first fixed seat close to the second speed reducing wheel, a second fixed seat fixed on one side of the box body far away from the motor, a second transmission wheel rotatably installed on one side of the second fixed seat close to the motor, a third fixed seat fixed on one side of the box body far away from the motor and a third transmission wheel rotatably installed on one side of the third fixed seat close to the motor; the second transmission wheel is respectively meshed with the first transmission wheel and the third transmission wheel; the transmission wheel is in threaded connection with the lead screw; and a transmission mechanism for driving the third transmission wheel to rotate is arranged between the square shaft and the third transmission wheel.

By adopting the technical scheme, after the transmission mechanism drives the third transmission wheel to rotate, the third transmission wheel drives the second transmission wheel to rotate, and the second transmission wheel drives the first transmission wheel to rotate; in the process of connecting the first driving wheel with the screw threads, the box body moves along the axial direction of the screw, and the second speed reducing wheel and the chain wheel are separated conveniently and then the box body is driven to move through the motor.

The invention is further configured to: the transmission mechanism comprises a second threaded shaft fixed at one end of the square shaft, which is far away from the first threaded shaft, a first circular groove and two second circular grooves which are formed in one side of the third fixed seat, which is close to the third driving wheel, a rotating shaft which is arranged in the first circular groove in a sliding manner along the axial direction of the third driving wheel, and two threaded rods which are respectively arranged in the two second circular grooves in a sliding manner along the axial direction of the third driving wheel; a square cavity is formed in the third fixing seat; a first gear and two second gears are rotatably mounted in the square cavity, and the two second gears are respectively meshed with the first gear; a rotating assembly for driving the first gear to rotate is arranged between the first gear and the rotating shaft; each second gear is in threaded connection with one threaded rod respectively; the third driving wheel is in threaded connection with the second threaded shaft; two limiting through holes are formed in one side, close to the second speed reducing wheel, of the third driving wheel; a limiting shaft is fixed on one side, close to the second speed reducing wheel, of each second gear, and each limiting shaft is arranged in the limiting through hole in a sliding mode along the axial direction of the third transmission wheel; and a guide assembly used for driving the limiting shaft to axially move along the third driving wheel is arranged between each limiting shaft and each limiting through hole.

By adopting the technical scheme, the second threaded shaft is contacted with the third driving wheel in the moving process of the square shaft which is far away from one side of the chain wheel; when the limiting shaft is inserted into the limiting through hole, the limiting shaft limits the third driving wheel to rotate; after the second threaded shaft is in threaded connection with the third transmission wheel, the second threaded shaft moves towards one side close to the square cavity, and meanwhile the second threaded shaft pushes the rotating shaft to move; the rotating shaft moving process drives the first gear to rotate through the rotating assembly, the first gear drives the two second gears to rotate respectively, the second gear drives the limiting shaft to move towards one side away from the second speed reducing wheel, the limiting shaft is separated from the limiting through hole, the second gear rotates along with the second threaded shaft, the second threaded shaft is convenient to move to drive the limiting shaft to be separated from the limiting through hole, the second gear rotates along with the second threaded shaft, the rotation of the first driving wheel is further realized, and the box body is driven to move.

The invention is further configured to: every group direction subassembly includes along spacing through-hole axial fixation in the spacing through-hole lateral wall spacing and along spacing axial division in spacing off-axial face bar groove, spacing slides along the third drive wheel axial and sets up in the bar inslot.

Through adopting above-mentioned technical scheme, spacing provides the guide effect for the bar groove, reduces spacing axle along the skew orbital possibility of third drive wheel axial displacement in-process.

The invention is further configured to: the rotating assembly comprises a rotating through hole arranged on one side of the first gear close to the third driving wheel, five spiral grooves which are uniformly distributed on the inner circumferential surface of the rotating through hole along the axial direction of the rotating through hole, and five spiral protrusions which are uniformly distributed on the outer circumferential surface of the rotating shaft along the axial direction of the rotating shaft.

Through adopting above-mentioned technical scheme, every heliciform arch all meshes with a heliciform recess. In the process that the rotating shaft axially moves along the rotating through hole, the spiral protrusion axially abuts against the spiral groove along the rotating through hole, and the spiral protrusion applies rotating torque to the spiral groove, so that the first gear is rotated.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. the second speed reducing wheel is detachably connected with the chain wheel by arranging the internal threaded pipe and the first threaded shaft, and after the lifting hook rises to a specified height, the rotation of the chain wheel is stopped by disconnecting the second speed reducing wheel from the chain wheel, so that the lifting hook is further prevented from continuously rising, and the possibility that the integral balance of the chain block is influenced due to the fact that the lifting hook rises too high is reduced;

2. by arranging the braking device, after the lifting hook ascends to a specified height, the retaining strip is pushed to move through the pressing part, the retaining strip prevents the internal threaded pipe from rotating, and the chain wheel is further separated from the second speed reducing wheel, so that the lifting hook is prevented from continuously ascending;

3. through setting up drive arrangement, be convenient for second deceleration wheel and sprocket separation back, remove through motor drive box.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the internally threaded tube of the present invention highlighted;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is an enlarged schematic view at B of FIG. 2;

FIG. 5 is a cross-sectional view of the salient drive mechanism of the present invention;

FIG. 6 is a schematic view showing a third driving wheel according to the present invention;

fig. 7 is an enlarged schematic view at C in fig. 5.

In the figure: 1. a support bar; 11. a fixing member; 12. a box body; 13. a sprocket; 14. a motor; 15. a first rotating shaft; 16. a first reduction wheel; 17. a second reduction gear; 2. a partition plate; 21. mounting a through hole; 22. an internally threaded tube; 23. a second rotating shaft; 24. a blocking cover; 25. a drive chain; 26. fixing the column; 27. a hook; 3. a braking device; 31. an annular groove; 32. a brake bar; 33. a strip-shaped chute; 34. a limiting through hole; 35. a pressing member; 36. a bevel; 37. a square through hole; 38. a square shaft; 39. a first threaded shaft; 4. a drive device; 41. a lead screw; 42. a first fixed seat; 43. a first drive pulley; 44. a second fixed seat; 45. a second transmission wheel; 46. a third fixed seat; 47. a third transmission wheel; 48. a limiting shaft; 5. blocking strips; 51. a spring; 52. mounting grooves; 53. a guide through hole; 54. a guide shaft; 6. a transmission mechanism; 61. a second threaded shaft; 62. a first circular groove; 63. a second circular groove; 64. a rotating shaft; 65. a threaded rod; 66. a square cavity; 67. a first gear; 68. a second gear; 7. a rotating assembly; 71. rotating the through hole; 72. a helical protrusion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example (b): an electric chain block, as shown in fig. 1 and 2, comprises a support rod 1, two fixing pieces 11 arranged on the outer peripheral surface of the support rod 1 in a sliding manner along the axial direction of the support rod 1, a box body 12 fixed at the bottoms of the two fixing pieces 11, a partition plate 2 fixed on the inner top surface of the box body 12, a motor 14 arranged on the outer side wall of the box body 12, a first rotating shaft 15 fixedly connected with the output end of the motor 14, a first reducing gear 16 fixed on the outer peripheral surface of the first rotating shaft 15, a second reducing gear 17 rotatably arranged on one side, close to the first reducing gear 16, of the partition plate 2, an installation through hole 21 arranged on one side, close to the second reducing gear 17, of the partition plate 2, an internal threaded pipe 22 rotatably arranged in the installation through hole 21, a second rotating shaft 23 fixed on one side, far away from the second reducing gear 17, of the internal threaded pipe 22, and a chain wheel 13 fixed on the outer peripheral surface of the second rotating shaft 23. The bottom of the clapboard 2 is fixedly connected with the inner bottom surface of the box body 12; the partition 2 divides the interior of the housing 12 into two separate regions. First reduction gear 16 meshes with second reduction gear 17. Referring to fig. 3, a retaining cover 24 is fixed to one side of the internally threaded pipe 22, which is far away from the second reduction gear 17, and one side of the retaining cover 24, which is far away from the second reduction gear 17, is fixedly connected to one end, which is close to the second reduction gear 17, of the second rotating shaft 23. The peripheral surface of the chain wheel 13 is sleeved with a transmission chain 25, one end of the transmission chain 25 is fixed with a fixed column 26, and the bottom of the fixed column 26 is fixed with a hook 27. The box 12 is provided with a driving device 4 for driving the box 12 to move along the axial direction of the support rod 1. A brake device 3 for preventing the rotation of the internally threaded tube 22 is arranged between the internally threaded tube 22 and the fixing column 26. One end of the second rotating shaft 23, which is far away from the internal threaded pipe 22, is fixedly connected with the inner side wall of the box body 12, which is close to the motor 14. A square through hole 37 is formed in one side, close to the internal threaded pipe 22, of the second reduction gear 17, and a square shaft 38 is arranged in the square through hole 37 in a sliding mode along the axial direction of the second reduction gear 17. A first threaded shaft 39 is fixed to one end of the square shaft 38 near the internally threaded tube 22, and the first threaded shaft 39 is threadedly connected with the internally threaded tube 22. After the motor 14 is started, the motor 14 drives the first rotating shaft 15 to rotate, the first rotating shaft 15 drives the second reducing gear 17 to rotate through the first reducing gear 16, the second reducing gear 17 drives the internal thread pipe 22 to rotate through the first threaded shaft 39, the internal thread pipe 22 drives the chain wheel 13 to rotate through the second rotating shaft 23, and the chain wheel 13 drives the lifting hook 27 to ascend through the transmission chain 25 in the rotating process.

As shown in fig. 2 and 3, the braking device 3 includes an annular groove 31 provided on the peripheral side of the mounting through hole 21, a braking strip 32 fixed to the outer peripheral surface of the internally threaded pipe 22, a strip-shaped sliding groove 33 provided on the side of the annular groove 31 away from the second reduction gear 17, a barrier strip 5 slidably provided in the strip-shaped sliding groove 33 along the axial direction of the annular groove 31, and a pressing member 35 fixed to the top of the fixed column 26. The brake strip 32 is rotatably mounted in the annular groove 31 along the circumferential direction of the annular groove 31. The pressing member 35 and the blocking strip 5 are respectively provided with an inclined surface 36 on the opposite inner sides. The strip-shaped chute 33 communicates with the annular groove 31. When the fixed column 26 drives the lifting hook 27 to move upwards, the pressing piece 35 is in contact with the barrier strip 5, and the pressing piece 35 pushes the barrier strip 5 to move towards the inner side of the strip-shaped sliding groove 33 through the inclined surface 36; when the barrier strip 5 moves into the annular groove 31, the brake strip 32 contacts with the barrier strip 5 to stop rotating during rotation. At this time, the second reduction gear 17 drives the first threaded shaft 39 to rotate continuously, and the first threaded shaft 39 moves to the side far away from the chain wheel 13 during rotation.

As shown in fig. 2 and 4, a spring 51 is fixed on one side of the barrier strip 5 close to the second reduction gear 17, a mounting groove 52 is formed on one side of the strip-shaped chute 33 close to the second reduction gear 17, and one end of the spring 51 close to the second reduction gear 17 is fixedly connected with one side of the mounting groove 52 close to the second reduction gear 17. When the barrier rib 5 moves into the annular groove 31, the spring 51 is in a compressed state and applies an elastic force to the barrier rib 5 on the side close to the sprocket 13. A guide through hole 53 is formed in one side, close to the second speed reducing wheel 17, of the mounting groove 52, a guide shaft 54 is fixed to one side, close to the second speed reducing wheel 17, of the barrier strip 5, and the guide shaft 54 is arranged in the guide through hole 53 in a sliding manner along the axial direction of the second speed reducing wheel 17. The spring 51 is fitted around the guide shaft 54. The guide through hole 53 provides a guide function for the guide shaft 54, and reduces the possibility that the barrier strip 5 deviates from the track during the axial movement along the second reduction gear 17.

As shown in fig. 5, the driving device 4 includes a screw 41 disposed parallel to the supporting rod 1, a first fixing seat 42 fixed to a side of a fixing member 11 close to the second speed-reducing wheel 17, a first driving wheel 43 rotatably mounted on a side of the first fixing seat 42 close to the second speed-reducing wheel 17, a second fixing seat 44 fixed to an inner side wall of the case 12 far from the motor 14, a second driving wheel 45 rotatably mounted on a side of the second fixing seat 44 close to the motor 14, a third fixing seat 46 fixed to an inner side wall of the case 12 far from the motor 14, and a third driving wheel 47 rotatably mounted on a side of the third fixing seat 46 close to the motor 14. The second transmission wheel 45 is respectively meshed with the first transmission wheel 43 and the third transmission wheel 47. The first drive wheel 43 is screwed to the spindle 41. A transmission mechanism 6 for driving the third transmission wheel 47 to rotate is arranged between the square shaft 38 and the third transmission wheel 47. The first rotating shaft 15 penetrates through the second transmission wheel 45 and is rotatably connected with the second fixed seat 44. After the transmission mechanism 6 drives the third transmission wheel 47 to rotate, the third transmission wheel 47 drives the second transmission wheel 45 to rotate, and the second transmission wheel 45 drives the first transmission wheel 43 to rotate; during the process of screwing the first transmission wheel 43 to the lead screw 41, the box body 12 moves along the axial direction of the lead screw 41.

As shown in fig. 5 and 6, the transmission mechanism 6 includes a second threaded shaft 61 fixed to an end of the square shaft 38 away from the first threaded shaft 39, and, with reference to fig. 7, a first circular groove 62 and two second circular grooves 63 opened on a side of the third fixed seat 46 close to the third transmission wheel 47, a rotation shaft 64 slidably disposed in the first circular groove 62 along the axial direction of the third transmission wheel 47, and two threaded rods 65 slidably disposed in the two second circular grooves 63 along the axial direction of the third transmission wheel 47, respectively. A square cavity 66 communicated with the first circular groove 62 and the two second circular grooves 63 is formed in the third fixing seat 46; a first gear 67 and two second gears 68 are rotatably mounted in the square cavity 66, and the two second gears 68 are respectively engaged with the first gear 67. A rotating assembly 7 for driving the first gear 67 to rotate is arranged between the first gear 67 and the rotating shaft 64. Each second gear 68 is in threaded connection with one of the threaded rods 65. The third transmission wheel 47 is in threaded connection with the second threaded shaft 61. Two limiting through holes 34 are formed in one side, close to the second speed reducing wheel 17, of the third driving wheel 47; and a limiting shaft 48 is fixed on one side of each second gear 68 close to the second speed reducing wheel 17, and each limiting shaft 48 is axially arranged in the limiting through hole 34 in a sliding manner along the third driving wheel 47. A limiting strip is axially fixed on the side wall of the limiting through hole 34 along the limiting through hole 34, and a strip-shaped groove is axially formed on the outer peripheral surface of the limiting shaft 48 along the limiting shaft 48; the limiting strips are arranged in the strip-shaped grooves in a sliding mode along the axial direction of the third driving wheel 47. In the process that the square shaft 38 moves to the side far away from the chain wheel 13, the second threaded shaft 61 is in contact with the third driving wheel 47; when the limiting shaft 48 is inserted into the limiting through hole 34, the limiting shaft 48 limits the third driving wheel 47 to rotate; after the second threaded shaft 61 is in threaded connection with the third transmission wheel 47, the second threaded shaft 61 moves towards one side close to the square cavity 66, and meanwhile, the second threaded shaft 61 pushes the rotating shaft 64 to move; the rotating shaft 64 drives the first gear 67 to rotate through the rotating assembly 7 in the moving process, the first gear 67 drives the two second gears 68 to rotate respectively, the second gear 68 drives the limiting shaft 48 to move towards one side far away from the second speed reducing wheel 17, and after the limiting shaft 48 is separated from the limiting through hole 34, the second gear 68 rotates along with the second threaded shaft 61.

As shown in fig. 7, the rotating assembly 7 includes a rotating through hole 71 formed at a side of the first gear 67 close to the third transmission wheel 47, five spiral grooves uniformly distributed on an inner circumferential surface of the rotating through hole 71 along an axial direction of the rotating through hole 71, and five spiral protrusions 72 uniformly distributed on an outer circumferential surface of the rotating shaft 64 along the axial direction of the rotating shaft 64. Each helical protrusion 72 engages one of the helical grooves. During the axial movement of the rotating shaft 64 along the rotating through hole 71, the spiral protrusion 72 axially presses against the spiral groove along the rotating through hole 71, and the spiral protrusion 72 applies a rotating torque to the spiral groove, thereby realizing the rotation of the first gear 67.

The working principle of the embodiment is as follows:

after the motor 14 is started, the motor 14 drives the first rotating shaft 15 to rotate, the first rotating shaft 15 drives the second reducing gear 17 to rotate through the first reducing gear 16, the second reducing gear 17 drives the internal thread pipe 22 to rotate through the first threaded shaft 39, the internal thread pipe 22 drives the chain wheel 13 to rotate through the second rotating shaft 23, and the chain wheel 13 drives the lifting hook 27 to ascend through the transmission chain 25 in the rotating process. When the fixed column drives the lifting hook 27 to move upwards, the pressing part 35 is in contact with the barrier strip 5, and the pressing part 35 pushes the barrier strip 5 to move towards the inner side of the strip-shaped sliding groove 33 through the inclined surface 36; when the barrier strip 5 moves into the annular groove 31, the brake strip 32 contacts with the barrier strip 5 to stop rotating during rotation. At this time, the second reduction gear 17 drives the first threaded shaft 39 to rotate continuously, and the first threaded shaft 39 moves to the side far away from the chain wheel 13 during rotation. In the process that the square shaft 38 moves to the side far away from the chain wheel 13, the second threaded shaft 61 is in contact with the third driving wheel 47; when the limiting shaft 48 is inserted into the limiting through hole 34, the limiting shaft 48 limits the third driving wheel 47 to rotate; after the second threaded shaft 61 is in threaded connection with the third transmission wheel 47, the second threaded shaft 61 moves towards one side close to the square cavity 66, and meanwhile, the second threaded shaft 61 pushes the rotating shaft 64 to move; the rotating shaft 64 drives the first gear 67 to rotate through the rotating assembly 7 in the moving process, the first gear 67 drives the two second gears 68 to rotate respectively, the second gear 68 drives the limiting shaft 48 to move towards one side far away from the second speed reducing wheel 17, and after the limiting shaft 48 is separated from the limiting through hole 34, the second gear 68 rotates along with the second threaded shaft 61. After the transmission mechanism 6 drives the third transmission wheel 47 to rotate, the third transmission wheel 47 drives the second transmission wheel 45 to rotate, and the second transmission wheel 45 drives the first transmission wheel 43 to rotate; during the process of screwing the first transmission wheel 43 to the lead screw 41, the box body 12 moves along the axial direction of the lead screw 41.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides an electronic chain block, includes box (12), is fixed in baffle (2) and the rotation of top surface install in box (12) second deceleration wheel (17) of baffle (2) one side, its characterized in that: the device is characterized by further comprising an installation through hole (21) formed in one side, close to the second speed reducing wheel (17), of the partition plate (2), an internal threaded pipe (22) rotatably installed in the installation through hole (21), a second rotating shaft (23) fixed to one side, far away from the second speed reducing wheel (17), of the internal threaded pipe (22), and a chain wheel (13) fixed to the outer peripheral surface of the second rotating shaft (23); a transmission chain (25) is sleeved on the outer peripheral surface of the chain wheel (13), and a fixed cylinder (26) is fixed at the end part of the transmission chain (25); a driving device (4) for driving the box body (12) to move along the axial direction of the support rod (1) is arranged in the box body (12); a braking device (3) for preventing the rotation of the internal threaded pipe (22) is arranged between the internal threaded pipe (22) and the fixed column body (26); a square through hole (37) is formed in one side, close to the internal threaded pipe (22), of the second speed reducing wheel (17), and a square shaft (38) is arranged in the square through hole (37) in a sliding mode along the axial direction of the second speed reducing wheel (17); a first threaded shaft (39) is fixed at one end of the square shaft (38) close to the internally threaded pipe (22), and the first threaded shaft (39) is in threaded connection with the internally threaded pipe (22); set up internal thread pipe (22) and first threaded shaft (39) to make second reducing gear (17) and sprocket (13) be for dismantling to be connected, after the lifting hook rises to appointed height, thereby stop the rotation of sprocket through the connection of disconnection second reducing gear (17) and sprocket, further prevent that the lifting hook from continuing to rise.

2. The electric chain block of claim 1, wherein: the braking device (3) comprises an annular groove (31) formed in the peripheral side of the mounting through hole (21), a braking strip (32) fixed on the peripheral surface of the internally threaded pipe (22), a strip-shaped sliding groove (33) formed in one side, far away from the second speed reducing wheel (17), of the annular groove (31), a barrier strip (5) arranged in the strip-shaped sliding groove (33) in a sliding mode along the axial direction of the annular groove (31), and a pressing piece (35) fixed to the top of the fixed column body (26); the brake strip (32) is rotatably arranged in the annular groove (31) along the circumferential direction of the annular groove (31); the opposite inner sides of the pressing piece (35) and the barrier strip (5) are respectively provided with an inclined plane (36).

3. The electric chain block as claimed in claim 2, wherein: the barrier strip (5) are close to second gear (17) one side and are fixed with spring (51), mounting groove (52) have been seted up to bar spout (33) near second gear (17) one side, spring (51) be close to second gear (17) one end with mounting groove (52) are close to second gear (17) one side fixed connection.

4. The electric chain block of claim 3, wherein: mounting groove (52) are close to second deceleration wheel (17) one side and have seted up guiding hole (53), blend stop (5) are close to second deceleration wheel (17) one side and are fixed with guiding axle (54), guiding axle (54) slide along second deceleration wheel (17) axial and set up in guiding hole (53).

5. The electric chain block of claim 1, wherein: the driving device (4) comprises a lead screw (41), a first fixed seat (42) fixed at the top of the box body (12), a first transmission wheel (43) rotatably mounted on one side, close to the second speed reducing wheel (17), of the first fixed seat (42), a second fixed seat (44) fixed on one side of the box body (12), a second transmission wheel (45) rotatably mounted on one side, close to the second speed reducing wheel (17), of the second fixed seat (44), a third fixed seat (46) fixed on one side, close to the second fixed seat (44), of the box body (12) and a third transmission wheel (47) rotatably mounted on one side, close to the second speed reducing wheel (17), of the third fixed seat (46); the second transmission wheel (45) is respectively meshed with the first transmission wheel (43) and the third transmission wheel (47); the first driving wheel (43) is in threaded connection with the lead screw (41); a transmission mechanism (6) for driving the third transmission wheel (47) to rotate is arranged between the square shaft (38) and the third transmission wheel (47).

6. The electric chain block of claim 5, wherein: the transmission mechanism (6) comprises a second threaded shaft (61) fixed at one end of the square shaft (38) far away from the first threaded shaft (39), a first circular groove (62) and two second circular grooves (63) arranged on one side of the third fixing seat (46) close to the third transmission wheel (47), a rotating shaft (64) arranged in the first circular groove (62) in a sliding manner along the axial direction of the third transmission wheel (47), and two threaded rods (65) respectively arranged in the two second circular grooves (63) in a sliding manner along the axial direction of the third transmission wheel (47); a square cavity (66) is formed in the third fixed seat (46); a first gear (67) and two second gears (68) are rotatably mounted in the square cavity (66), and the two second gears (68) are respectively meshed with the first gear (67); a rotating assembly (7) for driving the first gear (67) to rotate is arranged between the first gear (67) and the rotating shaft (64); each second gear (68) is in threaded connection with one threaded rod (65); the third transmission wheel (47) is in threaded connection with the second threaded shaft (61); two limiting through holes (34) are formed in one side, close to the second speed reducing wheel (17), of the third transmission wheel (47); a limiting shaft (48) is fixed on one side, close to the second speed reducing wheel (17), of each second gear (68), and each limiting shaft (48) is axially arranged in the limiting through hole (34) in a sliding mode along the axial direction of a third driving wheel (47); and a guide assembly for driving the limiting shaft (48) to axially move along the third driving wheel (47) is arranged between each limiting shaft (48) and the limiting through hole (34).

7. The electric chain block of claim 6, wherein: every group the direction subassembly includes along spacing through-hole (34) axial fixation in the spacing strip of spacing through-hole (34) lateral wall and along spacing axle (48) axial division in spacing axle (48) outer peripheral face bar groove, spacing slides along third drive wheel (47) axial and sets up in the bar inslot.

8. The electric chain block of claim 6, wherein: the rotating assembly (7) comprises a rotating through hole (71) formed in one side, close to the third driving wheel (47), of the first gear (67), five spiral grooves axially and uniformly distributed on the inner circumferential surface of the rotating through hole (71) along the rotating through hole (71), and five spiral protrusions (72) axially and uniformly distributed on the outer circumferential surface of the rotating shaft (64) along the rotating shaft (64).