Transmission structure of jack

Abstract

The utility model provides a jack transmission structure, comprising: a lifting mechanism comprising a rack fixedly arranged at the lower end of a suspender; the rotating mechanism is driven by the lifting mechanism to rotate, the rotating mechanism comprises a gear matched with the rack, rotating magnets symmetrically arranged on the two sides of the gear and fixed magnets located below the rotating magnets, and the gear rotates to drive the rotating magnets to rotate; the transmission ratchet mechanism is arranged in the gear and used for transmission of the gear and the rotating magnet; and the reverse rotation preventing mechanism is arranged on the outer side of one rotating magnet and used for preventing the rotating magnet from rotating reversely. The utility model provides a jack transmission structure. A lifting mechanism adopts gear and rack transmission, a transmission ratchet mechanism drives a rotating magnet to rotate through a gear to finish magnetizing and demagnetizing of a fixed magnet, and the rotating magnet can rotate infinitely, so that magnetic fields are alternated, and no residual magnetism exists.

Description

Technical Field

[0001] The present application relates to the field of mechanical equipment, and in particular to a crane transmission structure. Background Art

[0002] Permanent magnetic lifters, also known as permanent magnetic lifters, have the characteristics of small size, strong holding force, no need for electricity, almost zero residual magnetism, and high safety factor. Most of the permanent magnetic lifters currently used are manually controlled starting switches. Personnel turn the remote control lever on the lifter to drive the internal moving magnet to rotate, and cooperate with the fixed magnet to form an attractive magnetic field. However, the crank handle of this hand-cranked permanent magnetic lifter is prone to cause the lifter to be accidentally closed when it is collided, causing lifting accidents. Although limit columns are subsequently used to fix the remote control lever, personnel are required to control the switch to lift each time during use. The lifting operation is inconvenient and affects the lifting efficiency.

[0003] At present, there are many varieties of permanent magnetic lifters, most of which are manual. In recent years, automatic products have also been launched. The existing patent for an automatic permanent magnetic lifter (patent application number 201210530327.0) is one of them. It includes a body and a rotating device provided inside it, a lifting device that can drive it to rotate is connected to the rotating device, and rotating magnetic poles, inner rotating cover plates and outer rotating cover plates are respectively provided on the rotating device and on both sides of the lifting device. The rotating magnetic pole is clamped between the inner rotating cover plate and the outer rotating cover plate, and a partition wall is provided between the lifting device and the inner rotating cover plate. Fixed magnetic poles are provided on the body and on both sides of the rotating magnetic poles. The rotating magnetic poles and the fixed magnetic poles are made of neodymium iron boron material. A rolling device is provided between the inner rotating cover plate and the partition wall or between the outer rotating cover plate and the inner wall adjacent to the body. This automatic permanent magnetic lifter has the following disadvantages: A: It has only one rotating magnetic pole, which can only swing in a small range and produce residual magnetism. B: Its transmission is a flexible belt (such as a chain) that drives the rotating magnetic pole to swing and the coil spring to reset. This has a complex structure and unreliable operation. C: The rotating magnetic pole of the magnetic lifter can only swing, so when putting down the steel plate, you can only manually hold the handles on both sides of the magnetic lifter to detach from the steel plate. Utility Model Content

[0004] The present application proposes a crane transmission structure, aiming to solve the above-mentioned problems of the background technology.

[0005] The present application proposes a crane transmission structure, comprising:

[0006] The lifting mechanism comprises a rack fixedly arranged at the lower end of the suspension rod;

[0007] A rotating mechanism, driven to rotate by the lifting mechanism, the rotating mechanism comprising a gear matched with the rack, rotating magnets symmetrically arranged on both sides of the gear, and a fixed magnet located below the rotating magnet, wherein the rotating magnet is driven to rotate by the rotation of the gear;

[0008] A transmission ratchet mechanism, arranged inside the gear, for transmission between the gear and the rotating magnet;

[0009] The anti-reversal mechanism is arranged on the outer side of one of the rotating magnets and is used to prevent the rotating magnet from reversing.

[0010] In some embodiments, the transmission ratchet mechanism includes a first pawl disposed inside the gear and a first ratchet disposed at one end of the two rotating magnets.

[0011] In some embodiments, a center hole is provided at the center of the first ratchet, a notch is extended from the side wall of the center hole, one end of the first pawl is provided in the notch, a return spring is provided on one side of the first pawl, and the other end of the return spring abuts against the gear.

[0012] In some embodiments, the two rotating magnets use male and female sockets.

[0013] In some embodiments, one end shaft of one rotating magnet is provided with a protrusion, and one end shaft of the other rotating magnet is provided with a groove adapted to the protrusion, and the protrusion is inserted into the groove to achieve synchronous rotation of the two rotating magnets.

[0014] In some embodiments, the width of the gear is greater than the length of the connection between the two rotating magnets.

[0015] In some embodiments, a vertically arranged guide groove is further included, and a positioning block adapted to the guide groove is arranged on the rack to prevent the rack from swinging during movement.

[0016] In some embodiments, the anti-reversal mechanism includes a second ratchet wheel disposed on one side of the rotating magnet and a second fixed pawl.

[0017] The beneficial effects of the jack transmission structure in this application are as follows:

[0018] The utility model provides a lifting device transmission structure, including a lifting mechanism, a rotating mechanism, a transmission ratchet mechanism and an anti-reversal mechanism. The lifting mechanism adopts a gear rack transmission. The transmission ratchet mechanism drives the rotating magnet to rotate through the gear to complete the magnetization and demagnetization of the fixed magnet. The rotating magnet can rotate infinitely to make the magnetic field alternate without residual magnetism. The utility model has the characteristics of compact structure, high degree of automation and reliable action. The fixed magnet can automatically complete the magnetic attraction of the steel plate and the demagnetization of the steel plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the transmission structure of the jack in one embodiment of the present application;

[0020] Figure 2 For this application Figure 1 A schematic cross-sectional view of an embodiment;

[0021] Figure 3 For this application Figure 1 A schematic diagram of the three-dimensional structure of the transmission ratchet mechanism of the embodiment;

[0022] Figure 4 This is a schematic diagram of the structure of the rotating magnet of the present application;

[0023] Among them, 10, lifting mechanism; 11, suspension rod; 12, rack; 13, guide groove; 14, positioning block; 20, rotating mechanism; 21, gear; 22, rotating magnet; 23, fixed magnet; 24, protrusion; 25, groove; 30, transmission ratchet mechanism; 31, first pawl; 32, first ratchet; 33, center hole; 34, notch; 35, reset spring; 36, positioning screw; 40, anti-reversal mechanism; 41, second ratchet; 42, second pawl. DETAILED DESCRIPTION

[0024] In conjunction with the drawings in the embodiments of the present application, the schemes in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments in the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0026] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0027] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0028] This application proposes a crane transmission structure, referring to Figures 1 to 4 , including: a lifting mechanism 10, a rotating mechanism 20, a transmission ratchet mechanism 30 and an anti-reversal mechanism 40, the lifting mechanism 10, including a rack 12 fixedly arranged at the lower end of the suspension rod 11; the suspension rod 11 and the rack 12 are arranged as an integral whole, and the suspension rod 11 and the rack 12 rise and fall synchronously; the rotating mechanism 20 is driven to rotate by the lifting mechanism 10, the rotating mechanism 20 includes a gear 21 adapted to the rack 12, a rotating magnet 22 symmetrically arranged on both sides of the gear 21, and a fixed magnet 23 located below the rotating magnet 22, the gear 21 rotates to drive the rotating magnet 22 to rotate; the transmission ratchet mechanism 30 is arranged inside the gear 21, and is used for transmission between the gear 21 and the rotating magnet 22; the transmission ratchet mechanism 30 is arranged inside the gear 21, and is used to transmit the rotational torque to the rotating magnet 22, so as to realize the magnetization and demagnetization of the lifter. The anti-reversal mechanism 40 is disposed on the outer side of one of the rotating magnets 22 to prevent the rotating magnet 22 from reversing and to achieve a positioning effect on the rotating magnet 22 .

[0029] The working process of this utility model is:

[0030] A working cycle is completed by two up-and-down movements of the boom 11. That is, the boom 11 is lowered for the first time, the jack contacts the steel plate, the boom 11 is raised for the first time, the jack absorbs the steel plate and lifts it to the designated position, the boom 11 is lowered for the second time, and then raised for the second time, the jack is demagnetized and the steel plate is put down.

[0031] In some embodiments, the transmission ratchet mechanism 30 includes a first pawl 31 disposed inside the gear 21 and a first ratchet 32 ​​disposed at one end of the two rotating magnets 22. When the gear 21 rotates, the first pawl 31 drives the first ratchet 32 ​​to rotate in the same direction.

[0032] In some embodiments, a center hole 33 is provided at the center of the first ratchet 32, a notch 34 is extended from the side wall of the center hole 33, one end of the first pawl 31 is provided in the notch 34, a return spring 35 is provided on one side of the first pawl 31, and the other end of the return spring 35 abuts against the gear 21. A positioning through hole is provided on the gear 21, a positioning screw 36 is provided in the positioning through hole, a positioning groove adapted to the positioning screw 36 is provided on the side of the first pawl 31, and the other end of the positioning screw 36 is provided in the positioning groove, so as to prevent the first pawl 31 from swinging along the width direction of the gear 21, and the first pawl 31 rotates along the notch 34.

[0033] In some embodiments, the two rotating magnets 22 use male and female sockets. One end of the shaft of one rotating magnet 22 is provided with a protrusion 24, and one end of the shaft of the other rotating magnet 22 is provided with a groove 25 adapted to the protrusion 24. The protrusion 24 is inserted into the groove 25 to achieve synchronous rotation of the two rotating magnets 22. The outer side surface of the connection between the two rotating magnets 22 is provided with a first ratchet 32 ​​adapted to the first pawl 31.

[0034] In some embodiments, the width of the gear 21 is greater than the length of the connection between the two rotating magnets 22 , so that the gear 21 can synchronously drive the two rotating magnets 22 .

[0035] In some embodiments, a vertically arranged guide groove 13 is further included, and a positioning block 14 adapted to the guide groove 13 is arranged on the rack 12 to prevent the rack 12 from swinging during movement and ensure the movement direction of the rack 12 .

[0036] In some embodiments, the anti-reversal mechanism 40 includes a second ratchet 41 disposed on one side of the rotating magnet 22 and a second fixed pawl 42 .

[0037] In some embodiments, a magnetic body is further included for mounting a rotating magnet 22 and a fixed magnet 23, wherein the rotating magnet 22 includes rotating magnetic blocks distributed longitudinally along the rotating magnetic pole, and the fixed magnet 23 includes fixed magnetic blocks distributed longitudinally along the outer magnetic pole. The number of the rotating magnetic blocks and the fixed magnetic blocks is equal, and the material of the rotating magnetic blocks and the fixed magnetic blocks is neodymium iron boron or ferrite.

[0038] The beneficial effects of the jack transmission structure in this application are as follows:

[0039] The utility model provides a lifting device transmission structure, including a lifting mechanism 10, a rotating mechanism 20, a transmission ratchet mechanism 30 and an anti-reversal mechanism 40. The lifting mechanism 10 is driven by a gear 21 and a rack 12. The transmission ratchet mechanism 30 drives a rotating magnet 22 to rotate through the gear 21 to complete the magnetization and demagnetization of a fixed magnet 23. The rotating magnet 22 can rotate infinitely to alternate the magnetic field without residual magnetism. The rotating magnet 22 can rotate in one direction forever, not swinging forward and backward, which is convenient for demagnetization.

[0040] The utility model has the characteristics of compact structure, high automation and reliable action, and the magnetic attraction of the fixed magnet 23 to lift the steel plate and the demagnetization to put the steel plate down can be automatically completed.

[0041] The above are only partial or preferred embodiments of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A jack transmission structure, characterized in that: include: The lifting mechanism comprises a rack fixedly arranged at the lower end of the suspension rod; A rotating mechanism, driven to rotate by the lifting mechanism, the rotating mechanism comprising a gear matched with the rack, rotating magnets symmetrically arranged on both sides of the gear, and a fixed magnet located below the rotating magnet, wherein the rotating magnet is driven to rotate by the rotation of the gear; A transmission ratchet mechanism, arranged inside the gear, for transmission between the gear and the rotating magnet; The anti-reversal mechanism is arranged on the outer side of one of the rotating magnets and is used to prevent the rotating magnet from reversing.

2. The jack transmission structure according to claim 1, characterized in that: The transmission ratchet mechanism comprises a first pawl arranged inside the gear and a first ratchet arranged at one end of two rotating magnets.

3. The jack transmission structure according to claim 2, characterized in that: A center hole is provided at the center of the first ratchet wheel, a notch is extended from the side wall of the center hole, one end of the first pawl is provided in the notch, a return spring is provided on one side of the first pawl, and the other end of the return spring abuts against the gear.

4. The jack transmission structure according to claim 1, characterized in that: The two rotating magnets adopt male and female sockets.

5. The jack transmission structure according to claim 4, characterized in that: One end shaft of one rotating magnet is provided with a protrusion, and one end shaft of the other rotating magnet is provided with a groove matched with the protrusion. The protrusion is inserted into the groove to realize synchronous rotation of the two rotating magnets.

6. The jack transmission structure according to claim 5, characterized in that: The width of the gear is greater than the length of the connection between the two rotating magnets.

7. The jack transmission structure according to claim 1, characterized in that: It also includes a vertically arranged guide groove, and a positioning block adapted to the guide groove is arranged on the rack to prevent the rack from swinging when moving.

8. The jack transmission structure according to claim 1, characterized in that: The anti-reversal mechanism includes a second ratchet wheel arranged at one side of the rotating magnet and a second fixed pawl.

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