Gear shifting transmission mechanism

Abstract

The gear shifting transmission mechanism comprises a box body, a transmission shaft, a first worm, a second worm, a sliding sleeve, a connecting sleeve and a retaining piece, the right side of the second worm is provided with a first limiting part, the left side of the sliding sleeve is provided with a first limiting groove matched with the first limiting part, the right side of the sliding sleeve is further provided with a second limiting groove, and the second limiting groove is matched with the first limiting part. And a second limiting part matched with the second limiting groove is further arranged on the left side of the connecting sleeve, the sliding sleeve is pushed, so that the first limiting groove and the first limiting part are attached or separated, the second limiting groove and the second limiting part are attached or separated, and transmission control over the first worm and the second worm through the single transmission shaft is achieved. The device is simple in structure, single action and linkage of the two worms are achieved through the design of the single transmission shaft, so that different transmission modes are achieved, precision is high, and the production cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a transmission device, in particular to a gear-changing transmission mechanism. Background Art

[0002] Y-tooth zipper is a high-end zipper widely used in recent years. The zipper has stable performance, beautiful appearance, and smooth forward and reverse pulling. The copper wire used for the chain teeth in the Y-tooth zipper is produced by a copper wire calender. The copper wire calender is used to calender the cylindrical copper wire into a zipper wire with a "Y" cross-sectional shape. The processing principle is to guide the copper wire into the space between the upper pressure wheel and the lower pressure wheel under the guidance of the feed wheel, so that the upper and lower surfaces of the copper wire are respectively pressed by the upper pressure wheel and the lower pressure wheel to complete the calendering. Since the height of the feed wheel needs to be adjusted during processing to ensure continuous transportation under appropriate pressure, the prior art mostly uses a hand wheel to drive a worm gear transmission mechanism to adjust the feed wheel. Since the feed wheels are often used in groups, it is necessary to set up a set of independent worm gear transmission mechanisms, which is not only costly but also difficult to adjust the two feed wheels synchronously. In view of the above defects, it is necessary to design a gear transmission mechanism. Utility Model Content

[0003] The utility model aims to provide a gear-changing transmission mechanism, which realizes the single action and linkage of two worms through the design of a single transmission shaft, thereby realizing different transmission modes, which not only has high precision but also effectively reduces production costs.

[0004] To solve the above technical problems, the technical solution of the utility model is: a gear shift transmission mechanism, including a case, a transmission shaft, a first worm, a second worm, a sliding sleeve, a connecting sleeve, and a stopper, wherein the transmission shaft penetrates the case and is connected to the case for rotation, the first worm is located inside the case and penetrated by the transmission shaft, the first worm rotates synchronously with the transmission shaft, the second worm is penetrated by the transmission shaft and is located on the right side of the first worm, the second worm rotates along the transmission shaft, the sliding sleeve is penetrated by the transmission shaft and is located outside the case, the sliding sleeve is connected with the transmission shaft through clearance, the connecting sleeve is located on the right side of the sliding sleeve and penetrated by the transmission shaft, the connecting sleeve slides along the transmission shaft, the stopper is located on the right side of the connecting sleeve and on the right side of the transmission shaft, the stopper is detachably connected to the transmission shaft, a first limiting portion is provided on the right side of the second worm, a first limiting groove matching the first limiting portion is provided on the left side of the sliding sleeve, a second limiting groove is also provided on the right side of the sliding sleeve, and a second limiting portion matching the second limiting groove is also provided on the left side of the connecting sleeve.

[0005] The utility model is further improved as follows:

[0006] Furthermore, the transmission shaft is also provided with a key, the key is located on the right side of the transmission shaft, and the key is connected to the transmission shaft by interference fit.

[0007] Furthermore, the key is a flat key, which has the characteristics of simple structure and low processing cost.

[0008] Furthermore, an anti-collision pad is provided on the outer side of the first limiting portion, and the anti-collision pad is connected to the first limiting portion by interference fit.

[0009] Furthermore, the anti-collision pad is made of nylon, and the anti-collision pad made of nylon can effectively prevent the impact damage caused by the collision between the sliding sleeve and the second worm, thereby increasing the service life.

[0010] Furthermore, the first limiting portion is a spline, which has a large load-bearing capacity and improves working stability.

[0011] Furthermore, the sleeve is also provided with a handwheel portion, the handwheel portion is located outside the sleeve, and the handwheel portion is fixedly connected to the sleeve. The position of the sleeve on the transmission shaft can be quickly and conveniently adjusted through the handwheel portion to achieve different transmission modes.

[0012] Furthermore, the connecting sleeve is also provided with a slide groove matched with the flat key, and the slide groove matches the key so that the connecting sleeve can slide smoothly along the transmission shaft.

[0013] Furthermore, the retaining piece is made of nylon, and the retaining piece made of nylon effectively protects the connecting sleeve and increases its service life.

[0014] Compared with the prior art, when the gear-changing transmission mechanism is working, the handwheel part pushes the sliding sleeve to slide on the transmission shaft. When the first limiting groove on the sliding sleeve is in contact with the first limiting part, the handwheel part is turned, and the sliding sleeve drives the second worm to rotate. At this time, since the first worm is in contact with the worm wheel (not shown in the figure) meshing with it and the first worm rotates synchronously with the transmission shaft, and there is a clearance fit between the sliding sleeve and the transmission shaft, the sliding sleeve only drives the second worm to rotate, thereby driving the worm wheel (not shown in the figure) meshing with the second worm to rotate; when the second limiting groove on the sliding sleeve is in contact with the second limiting part and the connecting sleeve is tightly attached to the stop member, at this time, the connecting sleeve The sliding groove in the sleeve is fitted with the key, so under the drive of the handwheel part, the transmission shaft drives the first worm to rotate, and then drives the worm wheel (not shown in the figure) meshing with the first worm to rotate. At this time, the self-locking force generated by the meshing of the second worm and the worm wheel (not shown in the figure) keeps it stationary; when the second limiting groove on the sliding sleeve is fitted with the second limiting part and the first limiting groove is fitted with the first limiting part, at this time, the handwheel part is turned, and the sliding sleeve drives the second worm to rotate. At the same time, through the action of the key, the transmission shaft rotates with the sliding sleeve, and then drives the first worm and the second worm to rotate synchronously, driving the worm wheel (not shown in the figure) meshing with them to rotate synchronously. The device has a simple structure. Through the design of a single transmission shaft, the single action and linkage of the two worms are realized, thereby realizing different transmission modes. It is not only high in precision, but also effectively reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Showing the schematic diagram of the utility model structure

[0016] Figure 2 Schematic diagram showing the use status of the utility model

[0017] Figure 3 A schematic diagram showing another use state of the utility model

[0018] In the figure: box body 1, transmission shaft 2, first worm 3, second worm 4, sliding sleeve 5, connecting sleeve 6, retaining member 7, key 201, first limiting part 401, anti-collision pad 402, first limiting groove 501, second limiting groove 502, hand wheel part 503, second limiting part 601, sliding groove 602. DETAILED DESCRIPTION

[0019] like Figure 1As shown, a gear shift transmission mechanism includes a case 1, a transmission shaft 2, a first worm 3, a second worm 4, a sleeve 5, a connecting sleeve 6, and a stopper 7. The transmission shaft 2 penetrates the case 1 and is connected to the case 1 for rotation. The first worm 3 is located inside the case 1 and penetrated by the transmission shaft 2. The first worm 3 rotates synchronously with the transmission shaft 2. The second worm 4 is penetrated by the transmission shaft 2 and is located on the right side of the first worm 3. The second worm 4 rotates along the transmission shaft 2. The sleeve 5 is penetrated by the transmission shaft 2 and is located outside the case 1. The sleeve 5 is connected to the transmission shaft 2 with clearance fit. The connecting sleeve 6 is located on the right side of the sliding sleeve 5 and is penetrated by the transmission shaft 2. The connecting sleeve 6 slides along the axial direction of the transmission shaft 2. The retaining member 7 is located on the right side of the connecting sleeve 6 and on the right side of the transmission shaft 2. The retaining member 7 is detachably connected to the transmission shaft 2. A first limiting portion 401 is provided on the right side of the second worm 4. A first limiting groove 501 cooperating with the first limiting portion 401 is provided on the left side of the sliding sleeve 5. A second limiting groove 502 is also provided on the right side of the sliding sleeve 5. A second limiting portion 601 cooperating with the second limiting groove 502 is also provided on the left side of the connecting sleeve 6. The transmission The shaft 2 is also provided with a key 201, which is located on the right side of the transmission shaft 2. The key 201 is connected to the transmission shaft 2 by interference fit. The key 201 is a flat key, which has the characteristics of simple structure and low processing cost. An anti-collision pad 402 is also provided on the outer side of the first limiting portion 401. The anti-collision pad 402 is connected to the first limiting portion 401 by interference fit. The material of the anti-collision pad 402 is nylon. The anti-collision pad 402 made of nylon effectively prevents the impact damage caused by the collision between the sliding sleeve 5 and the second worm 4, thereby improving the service life. The first limiting portion 401 is a spline, and the spline The load-bearing capacity is large, and the working stability is improved. The sliding sleeve 5 is also provided with a handwheel part 503, and the handwheel part 503 is located on the outside of the sliding sleeve 5. The handwheel part 503 is fixedly connected to the sliding sleeve 5. The position of the sliding sleeve 5 on the transmission shaft 2 can be quickly and conveniently adjusted through the handwheel part 503 to realize different transmission modes. The connecting sleeve 6 is also provided with a sliding groove 602 matched with the flat key. The sliding groove 602 is used in conjunction with the key 201 to enable the connecting sleeve 6 to slide smoothly along the transmission shaft 2. The material of the retaining member 7 is nylon. The retaining member 7 made of nylon effectively protects the connecting sleeve 6 and improves the service life.

[0020] like Figure 1As shown, the sleeve 5 is pushed to slide on the transmission shaft 2 by the handwheel portion 503. When the second limit groove 502 on the sleeve 5 is fitted with the second limit portion 601 and the connecting sleeve 6 is tightly fitted with the stop member 7, at this time, the slide groove 602 in the connecting sleeve 6 is fitted with the key 201. Therefore, driven by the handwheel portion 503, the transmission shaft 2 drives the first worm 3 to rotate, and then drives the worm wheel (not shown in the figure) meshing with the first worm 3 to rotate. At this time, the self-locking force generated by the meshing of the second worm 4 and the worm wheel (not shown in the figure) keeps them stationary, thereby realizing the transmission of the first worm 3.

[0021] like Figure 2 As shown, the sleeve 5 is pushed to slide on the transmission shaft 2 by the handwheel part 503. When the first limit groove 501 on the sleeve 5 is fitted with the first limit part 401, the handwheel part 503 is rotated, and the sleeve 5 drives the second worm 4 to rotate. At this time, since the first worm 3 is meshed with the worm wheel (not shown in the figure) meshing with it and the first worm 3 rotates synchronously with the transmission shaft 2, and there is a clearance fit between the sleeve 5 and the transmission shaft 2, the sleeve 5 only drives the second worm 4 to rotate, and then drives the worm wheel (not shown in the figure) meshing with the second worm 4 to rotate, thereby realizing the transmission of the second worm 4.

[0022] like Figure 3 As shown, the sleeve 5 is pushed to slide on the transmission shaft 2 by the handwheel part 503. When the second limit groove 502 on the sleeve 5 is in contact with the second limit part 601 and the first limit groove 501 is in contact with the first limit part 401, at this time, the handwheel part 503 is rotated, and the sleeve 5 drives the second worm 4 to rotate. At the same time, through the action of the key 201, the transmission shaft 2 rotates with the sleeve 5, and then drives the first worm 3 and the second worm 4 to rotate synchronously, driving the worm wheel (not shown in the figure) meshing with them to rotate synchronously.

[0023] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A gear shift transmission mechanism, characterized in that The transmission shaft comprises a casing, a transmission shaft, a first worm gear, a second worm gear, a sliding sleeve, a connecting sleeve, and a stop member, wherein the transmission shaft penetrates the casing and is rotatably connected to the casing, the first worm gear is located inside the casing and is penetrated by the transmission shaft, the first worm gear rotates synchronously with the transmission shaft, the second worm gear is penetrated by the transmission shaft and is located on the right side of the first worm gear, the second worm gear rotates along the transmission shaft, the sliding sleeve is penetrated by the transmission shaft and is located outside the casing, the sliding sleeve is connected with the transmission shaft with clearance fit, the connecting sleeve is located on the right side of the sliding sleeve and is penetrated by the transmission shaft, the connecting sleeve slides along the transmission shaft, the stop member is located on the right side of the connecting sleeve and on the right side of the transmission shaft, the stop member is detachably connected to the transmission shaft, a first limiting portion is provided on the right side of the second worm gear, a first limiting groove matching with the first limiting portion is provided on the left side of the sliding sleeve, a second limiting groove is also provided on the right side of the sliding sleeve, and a second limiting portion matching with the second limiting groove is also provided on the left side of the connecting sleeve.

2. The gearshift transmission mechanism according to claim 1, characterized in that The transmission shaft is also provided with a key, which is located on the right side of the transmission shaft and is connected to the transmission shaft by interference fit.

3. The gearshift transmission mechanism according to claim 2, characterized in that The key is a flat key.

4. The gearshift transmission mechanism according to claim 1, characterized in that An anti-collision pad is also provided on the outer side of the first limiting portion, and the anti-collision pad is connected to the first limiting portion by interference fit.

5. The gearshift transmission mechanism according to claim 4, characterized in that The material of the anti-collision pad is nylon.

6. The gearshift transmission mechanism according to claim 1, characterized in that The first limiting portion is a spline.

7. The gearshift transmission mechanism according to claim 1, characterized in that The sliding sleeve is also provided with a hand wheel part, the hand wheel part is located outside the sliding sleeve, and the hand wheel part is fixedly connected to the sliding sleeve.

8. The gearshift transmission mechanism according to claim 3, characterized in that The connecting sleeve is also provided with a sliding groove matched with the flat key.

9. The gearshift transmission mechanism according to claim 1, characterized in that The material of the retaining piece is nylon.

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