Transmission gear of jack

Abstract

The utility model provides a jack transmission gear which comprises a gear body, a transmission shaft and a transmission shaft. The side wall of the central through hole extends outwards to form the mounting gap; the pawl comprises a ball head and pawl teeth; the ball head is arranged in the mounting notch, and the pawl teeth are arranged in the central through hole; the inner concave part for mounting the ball head is arranged on the side wall of the mounting notch; the reset spring is arranged on the side, away from the stress face, of the pawl and used for resetting the pawl. The jack transmission gear comprises the gear body, the installation notch, the pawl, the inner concave part and the reset spring, the gear body is driven when the rack ascends and descends, the gear body operates stably without clamping stagnation, and the gear body automatically resets under the action of the reset spring.

Description

Technical Field

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

[0004] There is an urgent need to provide a crane transmission gear to realize gear rack transmission and solve the above technical problems. Utility Model Content

[0005] The present application proposes a crane transmission gear which adopts a gear rack transmission, aiming to solve the problems of the above-mentioned background technology.

[0006] The present application proposes a jack transmission gear, comprising:

[0007] A gear, wherein a central through hole is provided at the center of the gear;

[0008] An installation notch is formed by extending outward from the side wall of the central through hole;

[0009] A pawl, comprising a ball head and pawl teeth; the ball head is arranged in the mounting notch, and the pawl teeth are arranged in the central through hole;

[0010] An inner concave portion, wherein the side wall of the mounting notch is provided with an inner concave portion for mounting the ball head;

[0011] A return spring is arranged on a side of the pawl away from the force-bearing surface and is used for returning the pawl.

[0012] In some examples, a limiting through hole is provided on the inner wall of the inner recess, a limiting screw is provided in the limiting through hole, an arc groove is provided on the outer side of the ball head, and the other end of the limiting screw is provided in the arc groove.

[0013] In some examples, an outer side surface of the gear close to the notch extends outward to form a mounting portion, and an outer side surface of the mounting portion is arranged in an arc shape with the center of the gear as the center.

[0014] In some examples, a positioning slope is provided at the upper end of the mounting portion for limiting the rotation of the gear.

[0015] In some examples, a mounting hole for mounting a return spring is provided on a side of the ratchet tooth away from the force-bearing surface.

[0016] In some examples, the return springs are symmetrically arranged in two pieces.

[0017] In some examples, the mounting notch includes a first inclined surface and a second inclined surface extending outward from two ends of the inner recess, and a third inclined surface extending from the first inclined surface toward the central through hole.

[0018] In some examples, the third inclined surface is provided with a mounting groove for mounting the return spring.

[0019] The beneficial effects of the jack transmission gear in this application are as follows:

[0020] The utility model provides a lifting device transmission gear, which cooperates with the rack on the lifting rod and adopts 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.

[0021] The utility model comprises a gear, a mounting notch, a ratchet, an inner concave part and a reset spring, so that the gear can be driven to move up and down when the rack is lifted, the gear can run smoothly without being stuck, and the gear can be automatically reset under the action of the reset spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the transmission gear of the jack in one embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the structure of a pawl in an embodiment of the present application;

[0024] Among them, 1. gear; 2. mounting notch; 3. pawl; 4. recessed portion; 5. reset spring; 6. center through hole; 8. limit screw; 9. arc groove; 10. mounting portion; 11. positioning inclined surface; 12. first inclined surface; 13. second inclined surface; 14. third inclined surface; 15. mounting groove; 16. mounting hole; 17. ball head; 18. pawl teeth. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] In addition, the descriptions of "first", "second", etc. in this application are only used 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.

[0029] This application proposes a jack transmission gear, referring to Figure 1 and Figure 2; It includes: a gear 1, a mounting notch 2, a pawl 3, an inner recess 4 and a reset spring 5. A central through hole 6 is provided in the center of the gear 1. The central through hole 6 is used to install the ratchet at the connecting shaft end of the two rotating magnets. The mounting notch 2 is extended outward from the side wall of the central through hole 6 to form the mounting notch 2. The pawl 3 includes a ball head 17 and a pawl tooth 18. The ball head 17 is arranged in the mounting notch 2, and the pawl tooth 18 is arranged in the central through hole 6. The pawl 3 cooperates with the ratchet, and then the gear 1 drives the rotating magnet to rotate to prevent reversal. The side wall of the mounting notch 2 is provided with an inner recess 4 for installing the ball head 17. The reset spring 5 is arranged on the side of the pawl 3 away from the force-bearing surface, and is used for resetting the pawl 3. The gear 1 can be reset without external force.

[0030] In some instances, a limiting through hole is provided on the inner wall of the inner recess 4, a limiting screw 8 is provided in the limiting through hole, an arc groove 9 is provided on the outer side of the ball head 17, the other end of the limiting screw 8 is provided in the arc groove 9, and the ball head 17 rotates along the inside of the inner recess 4. Under the action of the limiting screw 8 and the arc groove 9, the pawl 3 is prevented from swinging along the width direction of the pawl 3.

[0031] In some instances, the outer side surface of the gear 1 near the notch extends outward to form a mounting portion 10, and the outer side surface of the mounting portion 10 is arranged in an arc shape with the center of the gear 1 as the center, thereby improving the strength of the gear 1 and thereby increasing the service life.

[0032] In some instances, a positioning bevel 11 is provided at the upper end of the mounting portion 10 for limiting the rotation of the gear 1. When the gear 1 is driven by the rack, the positioning bevel 11 provided on the mounting portion 10 limits the lifting and lowering of the rack to prevent the rack from falling out.

[0033] In some examples, a mounting hole 16 for mounting the reset spring 5 is provided on the side of the ratchet tooth 18 away from the force-bearing surface, so as to limit the reset spring 5 and make the operation smoother.

[0034] In some examples, the return springs 5 ​​are two symmetrically arranged.

[0035] In some instances, the mounting notch 2 includes a first bevel 12 and a second bevel 13 extending outward from both ends of the inner recess 4, and a third bevel 14 extending from the first bevel 12 toward the center through hole 6, to ensure that the pawl 3 works smoothly and steadily without jamming.

[0036] In some examples, the third inclined surface 14 is provided with a mounting groove 15 for mounting the return spring 5 .

[0037] The beneficial effects of the jack transmission gear in this application are as follows:

[0038] The utility model provides a lifting device transmission gear, which cooperates with the rack on the lifting rod and adopts gear 1 rack transmission. The transmission ratchet mechanism drives the rotating magnet to rotate through the gear 1 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.

[0039] The utility model comprises a gear 1, a mounting notch 2, a ratchet 3, an inner recess 4 and a reset spring 5, so that the gear 1 can be driven to move up and down when the rack is lifted, and the gear 1 can run smoothly without being stuck, and the gear 1 can be automatically reset under the action of the reset spring 5.

[0040] 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 gear, characterized in that: include: A gear, wherein a central through hole is provided at the center of the gear; An installation notch is formed by extending outward from the side wall of the central through hole; A pawl, comprising a ball head and pawl teeth; the ball head is arranged in the mounting notch, and the pawl teeth are arranged in the central through hole; An inner concave portion, wherein the side wall of the mounting notch is provided with an inner concave portion for mounting the ball head; A return spring is arranged on a side of the pawl away from the force-bearing surface and is used for returning the pawl.

2. The jack transmission gear according to claim 1, characterized in that: A limiting through hole is arranged on the inner wall of the inner recess, a limiting screw is arranged in the limiting through hole, an arc groove is arranged on the outer side surface of the ball head, and the other end of the limiting screw is arranged in the arc groove.

3. The jack transmission gear according to claim 1, characterized in that: The outer side surface of the gear close to the notch extends outward to form a mounting portion, and the outer side surface of the mounting portion is arranged in an arc shape with the center of the gear as the center of the circle.

4. The jack transmission gear according to claim 3, characterized in that: The upper end of the mounting portion is provided with a positioning inclined surface for limiting the rotation of the gear.

5. The jack transmission gear according to claim 1, characterized in that: A mounting hole for mounting a reset spring is arranged on the side of the ratchet tooth away from the force-bearing surface.

6. The jack transmission gear according to claim 1, characterized in that: The return springs are arranged in two symmetrical arrangements.

7. The jack transmission gear according to claim 1, characterized in that: The mounting notch includes a first inclined surface and a second inclined surface extending outward from two ends of the inner recess, and a third inclined surface extending from the first inclined surface toward the central through hole.

8. The jack transmission gear according to claim 7, characterized in that: The third inclined surface is provided with a mounting groove for mounting the return spring.

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