A chain drive device and a traveling trolley

Abstract

The present invention discloses a chain drive device, wherein the transmission direction of the first section of the chain and the second section of the chain extending from the driving shaft is opposite to that of the driven shaft, so the first section of the chain and the second section of the chain can make the rotation direction of the driven shaft opposite to that of the driving shaft. In this way, the simultaneous reverse movement of the two shafts can be achieved only by connecting the chain between the driving shaft and the driven shaft, which can simplify the overall structure. The present invention also discloses a traveling trolley with the chain drive device, and the chain drive device is used to drive the lifting and lowering of the lifting frame in the traveling trolley.

Description

Technical Field

[0001] The chain driving device of the present invention belongs to the technical field of chain transmission.

[0002] The traveling trolley of the present invention belongs to the technical field of storage systems, in particular to a traveling trolley which travels on storage tracks. Background Art

[0003] Most of the existing chain transmission structures use gears and chains in combination, and the chain is driven by the rotation of the driving shaft, and the chain drives the driven shaft to rotate at the same time, thereby providing power to the driven shaft. The existing chain transmission structure can only drive the driving shaft and the driven shaft in the same direction, that is, the rotation direction of the driving shaft drives the driven shaft to rotate in the same direction. In some application structures, if the driving shaft and the driven shaft need to rotate in opposite directions, this type of chain transmission cannot be used. The only way is to extend a reversing structure through the motor, drive the driven shaft to rotate through another chain, or set the two shafts independently, and control the rotation of the two shafts through two motors respectively, so that the two shafts can rotate at the same time and in opposite directions. This will complicate the structure, not only occupying the internal space of the mechanical product, but also increasing the production cost.

[0004] Therefore, a new technical solution is needed to solve the above problems. Summary of the invention

[0005] Purpose of the invention: The present invention provides a chain drive device, which can rotate the driving shaft and the driven shaft in opposite directions at the same time through a chain between the driving shaft and the driven shaft.

[0006] The present invention also provides a walking trolley, and the chain driving device is applied to the lifting frame.

[0007] Technical solution: To achieve the above purpose, the present invention can adopt the following technical solution:

[0008] A chain drive device comprises a driving shaft and a driven shaft arranged in parallel with the driving shaft; the driving shaft is provided with a coaxial first driving gear and a second driving gear, and the driven shaft is provided with a coaxial first driven gear and a second driven gear; a first section of chain is wound around the first driving gear and the first driven gear, and a second section of chain is wound around the second driving gear and the second driven gear, one end of the first section of chain extends from above the first driving gear and extends from below the first driven gear and is wound around the first driven gear; one end of the second section of chain extends from below the second driving gear and extends from above the second driven gear and is wound around the second driven gear.

[0009] Beneficial effect: Compared with the prior art, when the driving shaft in the technical solution rotates, since the transmission direction of the first and second chain segments extending from the driving shaft is opposite to that of the driven shaft, the first and second chain segments can make the rotation direction of the driven shaft opposite to that of the driving shaft. In this way, the simultaneous reverse movement of the two shafts can be achieved only by connecting the chain between the driving shaft and the driven shaft, and there is no need to set other redundant reversing structures outside the space between the driving shaft and the driven shaft or use more than two motors as driving devices. Thus, the overall structure can be simplified.

[0010] Furthermore, a first tensioning gear, a first bracket carrying the first tensioning gear, a second tensioning gear, and a second bracket carrying the second tensioning gear are provided between the driving shaft and the driven shaft. The first tensioning gear is located above the first section of the chain and is pressed down to engage with the first section of the chain; the second tensioning gear is located above the second section of the chain and is lifted up to engage with the second section of the chain.

[0011] Furthermore, the power output shaft is provided with an output gear, the driving shaft is provided with an input gear matched with the output gear, and the output gear and the input gear are driven by a chain.

[0012] Furthermore, the power output shaft is connected to a motor system, which includes a drive motor and a reducer, and the power output shaft is an output shaft of the reducer.

[0013] The chain drive device can also adopt the following technical solutions:

[0014] A chain drive device comprises a driving shaft and a driven shaft arranged parallel to the driving shaft; the driving shaft is provided with a coaxial first driving gear, and the driven shaft is provided with a coaxial first driven gear; a first section of chain is wound around the first driving gear and the first driven gear, and one end of the first section of chain extends from above the first driving gear and extends from below the first driven gear and is wound around the first driven gear.

[0015] Beneficial effect: Compared with the prior art, when the driving shaft in the technical solution rotates, since the transmission direction of the first section of the chain extending from the driving shaft is reversed after reaching the driven shaft, the first section of the chain can make the rotation direction of the driven shaft opposite to that of the driving shaft. In this way, the two shafts can be simultaneously moved in the opposite direction only by connecting the chain between the driving shaft and the driven shaft, without the need to set other redundant reversing structures outside the space between the driving shaft and the driven shaft or use more than two motors as driving devices. Thus, the overall structure can be simplified.

[0016] The walking trolley provided by the present invention adopts the following technical solutions:

[0017] A walking trolley with the chain drive device comprises a vehicle body, a lifting frame, and wheels located outside the vehicle body; vertical guide columns are provided on both sides of the upper part of the vehicle body, and guide sliders cooperating with the guide columns are provided on the sides of the lifting frame, and the lifting frame moves up and down along the guide columns along with the guide sliders; a hollow receiving cavity is provided below the lifting frame, and the two sides of the receiving cavity are two side walls of the lifting frame, and the chain drive device is installed on the upper surface of the vehicle body and is located in the receiving cavity; both ends of the driving shaft are provided with a first connecting rod device, and one end of the first connecting rod device is fixedly connected to the driving shaft, and a first guide block is provided on the outer side of the other end of the first connecting rod device; both ends of the driven shaft are provided with a second connecting rod The lifting frame comprises a lifting device, and one end of the second connecting rod device is fixedly connected to the driven shaft, and a second guide block is arranged on the outer side of the other end of the second connecting rod device; the two side walls of the lifting frame are provided with a first guide groove matched with the first guide block, and a second guide groove matched with the second guide block; the first guide block and the second guide block move together under the drive of the driving shaft and the driven shaft, and the rotation directions of the first guide block and the second guide block when they move together are opposite, when the first guide block and the second guide block rotate together to the first position, the lifting frame moves downward to a position close to the vehicle body, and when the first guide block and the second guide block rotate together to a second position higher than the first position, the lifting frame moves upward to a position away from the vehicle body.

[0018] Beneficial effect: The walking trolley of the present technical solution will be able to realize the chain drive device with two axes rotating in opposite directions at the same time, and be applied to the lifting and lowering of the lifting frame. The lifting frame is driven to rise or fall by the connecting rod devices of the active shaft and the driven shaft respectively. Since the active shaft and the driven shaft can move in opposite directions at the same time, the lateral components of force given to the lifting frame by the first guide block driven by the active shaft and the second guide block driven by the driven shaft are also opposite and can offset each other. In this way, the overall lateral component of force of the lifting frame by the first guide block and the second guide block will not be transmitted to the guide columns of the vehicle body. The lifting frame can rise or fall smoothly relative to the guide columns without being affected by the mutual friction of lateral extrusion, so that the lifting frame can move stably and smoothly, and at the same time avoid the hidden danger of lateral deformation of the guide columns.

[0019] Furthermore, the first guide groove extends laterally, and when the first guide block rotates with the driving shaft, the first guide block moves back and forth laterally in the first guide groove; the second guide groove extends laterally relative to the first guide groove, and when the second guide block rotates with the driven shaft, the second guide block moves back and forth laterally in the second guide groove.

[0020] Furthermore, the first guide block includes a first cylindrical shaft fixed on the first connecting rod and a first block surrounding the first cylindrical shaft, the first cylindrical shaft and the first block are connected by a bearing, and the first block is arranged in the first guide groove; the second guide block includes a second cylindrical shaft fixed on the second connecting rod and a second block surrounding the second cylindrical shaft, the second cylindrical shaft and the second block are connected by a bearing, and the second block is arranged in the second guide groove.

[0021] Furthermore, the outer edge contours of the first block and the second block are both square, and the height of the first block is consistent with the height of the first guide groove, and the height of the second block is consistent with the height of the second guide groove.

[0022] Furthermore, the guide column and the guide slider are guided by means of a slide rail and a slide groove for receiving the slide rail, and the slide rail and the slide groove are respectively arranged on the guide column and the guide slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the chain drive device in the present invention.

[0024] Figure 2 It is a top view of the chain drive device of the present invention after being installed on the body of the traveling trolley, and shows the schematic structure of the chain drive device located inside the lifting frame.

[0025] Figure 3 It is a side view of the lifting frame and the body of the traveling trolley after being matched, and shows the state of the lifting frame when it is lowered to a lower position.

[0026] Figure 4 It is a side view of the lifting frame and the body of the traveling trolley after being matched, and shows the state of the lifting frame when it rises to a higher position. DETAILED DESCRIPTION

[0027] Embodiment 1

[0028] Please combine Figure 1 As shown, this embodiment discloses a chain drive device, which enables the two shafts in the device to rotate in opposite directions at the same time. In this embodiment, the two shafts are a driving shaft 100 and a driven shaft 200 arranged parallel to the driving shaft 100. The power of the driving shaft 100 is realized by the power output shaft 400 of the motor system. The power output shaft 400 is provided with an output gear 410, and the driving shaft 100 is provided with an input gear 110 that cooperates with the output gear 410. The output gear 410 and the input gear 110 are driven by a chain 420. The power output shaft 400 is connected to the motor system, and the motor system includes a driving motor 430 and a reducer 440, and the power output shaft 400 is the output shaft of the reducer 440.

[0029] The driving shaft 100 is provided with a first driving gear 101 and a second driving gear 102. The driven shaft 200 is provided with a first driven gear 201 and a second driven gear 202. A first chain 310 is wound around the first driving gear 101 and the first driven gear 201. A second chain 320 is wound around the second driving gear 102 and the second driven gear 202. One end of the first chain 310 extends from above the first driving gear 101 and extends from below the first driven gear 210 and is wound around the first driven gear 210; one end of the second chain 320 extends from below the second driving gear 102 and extends from above the second driven gear 202 and is wound around the second driven gear 202. The first chain 310 and the second chain 320 make the driven shaft 200 rotate in opposite directions to the driving shaft 100. In this way, the simultaneous reverse movement of the two shafts can be achieved only by connecting the driving shaft 100 and the driven shaft 200 through a chain, without the need to set up other redundant reversing structures outside the space between the driving shaft 100 and the driven shaft 200 or to use more than two motors as driving devices, thereby simplifying the overall structure.

[0030] A first tensioning gear 330, a first bracket 331 carrying the first tensioning gear, a second tensioning gear 340, and a second bracket 341 carrying the second tensioning gear 340 are further provided between the driving shaft 100 and the driven shaft 200. The first tensioning gear 330 is located above the first chain section 310 and is pressed down to mesh with the first chain section 310. The second tensioning gear 340 is located above the second chain section 320 and is lifted up to mesh with the second chain section 320.

[0031] Since the two ends of the first chain 310 in this embodiment need to be fixed on the first driving gear 101 and the first driven gear 201, and the two ends of the second chain 320 need to be fixed on the second driving gear 102 and the second driven gear 202, the driving shaft 100 and the driven shaft 200 cannot rotate continuously for one circle, but can only rotate at an angle less than one circle (the specific rotation angle is determined by the chain length). Therefore, this chain drive device is suitable for small-stroke shaft rotation, or an application environment where the driving shaft 100 and the driven shaft 200 reciprocate at an angle less than one circle. The chain drive device provided in this embodiment can make the driving shaft 100 and the driven shaft 200 rotate forward or reverse 180°, which belongs to a small-stroke chain drive.

[0032] Embodiment 2

[0033] Please combine Figures 2 to 4As shown, the second embodiment provides a trolley with a chain drive device of the first embodiment, which is applied to a shelf in a storage logistics system and can move on the track of the shelf. The chain drive device is used to drive the lifting frame in the trolley to rise or fall, and the lifting frame is used to carry goods. The trolley includes a car body 500, a lifting frame 510, and wheels located outside the car body. Vertical guide columns 530 are provided on both sides above the car body 500, and a guide slider 511 that cooperates with the guide column 530 is provided on the side of the lifting frame 510. The lifting frame 510 moves up and down along the guide column 530 with the guide slider 511. The guide column 530 and the guide slider 511 are guided by a slide rail (not numbered) and a slide groove (not numbered) for accommodating the slide rail, and the slide rail and the slide groove are respectively arranged on the guide column 530 and the guide slider 511. That is, a slide rail can be provided on the guide column 530, and a slide groove can be provided on the guide slider 511, or a slide groove can be provided on the guide column 530, and a slide rail can be provided on the guide slider 511. A hollow receiving chamber (not shown) is provided below the lifting frame 510, and the two sides of the receiving chamber are two side walls 512 of the lifting frame. The chain drive device is mounted on the upper surface of the vehicle body 500 and is located in the receiving chamber. A first connecting rod device 102 is provided at both ends of the driving shaft 100, and one end of the first connecting rod device 102 is fixedly connected to the driving shaft 100, and a first guide block 103 is provided on the outer side of the other end of the first connecting rod device 102. A second connecting rod device 202 is provided at both ends of the driven shaft 200, and one end of the second connecting rod device 202 is fixedly connected to the driven shaft 200, and a second guide block 203 is provided on the outer side of the other end of the second connecting rod device 202. The first connecting rod device 102 and the second connecting rod device 202 can be rod-shaped or can be a disc installed on the driving shaft or the driven shaft through an axle pin, as long as they can play the role of a "connecting rod" between the shaft and the guide block. The two side walls 512 of the lifting frame 510 are provided with a first guide groove 513 matched with the first guide block 103 and a second guide groove 514 matched with the second guide block 203. The first guide block 103 includes a first cylindrical shaft body 105 fixed on the first connecting rod device 102 and a first block body 106 surrounding the first cylindrical shaft body 105. The first cylindrical shaft body 105 and the first block body 106 are connected by a bearing. The first block body 106 is arranged in the first guide groove 513. The second guide block 203 includes a second cylindrical shaft body 205 fixed on the second connecting rod device 202 and a second block body 206 surrounding the second cylindrical shaft body 205. The second cylindrical shaft body 205 and the second block body 206 are connected by a bearing. The second block 206 is disposed in the second guide groove 514. The outer edges of the first block 106 and the second block 206 are both square. The height of the first block 106 is consistent with the height of the first guide groove 513, and the height of the second block 206 is consistent with the height of the second guide groove 514.The first guide block 103 and the second guide block 203 move together under the drive of the driving shaft 100 and the driven shaft 200. The first guide block 103 and the second guide block 203 rotate in opposite directions when they move together. Figure 3 As shown, when the first guide block 103 and the second guide block 203 rotate together to the first position (i.e., the lower position), the lifting frame 510 moves downward to a position close to the vehicle body 500, that is, when used on a storage shelf, the goods on the lifting frame 510 can be moved downward. Figure 4 As shown, when the first guide block 103 and the second guide block 203 rotate together to a second position higher than the first position, the lifting frame 510 moves upward to a position away from the vehicle body 500, that is, it can be used to lift the goods upward.

[0034] Since the movement of the first guide block 103 and the second guide block 203 from top to bottom or from bottom to top is an arc-shaped trajectory, the first guide groove 513 and the second guide groove 514 need to provide space for the first guide block 103 and the second guide block 203 to move in the horizontal direction. That is, the first guide groove 513 extends horizontally, and when the first guide block 103 rotates with the driving shaft 100, the first guide block 103 moves back and forth horizontally in the first guide groove 513; the second guide groove 514 extends horizontally relative to the first guide groove 513, and when the second guide block 103 rotates with the driven shaft 200, the second guide block 203 moves back and forth horizontally in the second guide groove 514. Since it is necessary to keep the heights of the two ends of the top surface of the lifting frame 510 consistent, the heights of the first guide block 103 and the second guide block 203 when moving also need to be consistent, and the size of the overall structure can be adjusted.

[0035] Due to the adoption of the chain drive device of the first embodiment, the traveling trolley can realize the two axes rotating in opposite directions at the same time to drive the lifting frame 510 to rise or fall, and the lifting frame 510 can be driven to rise or fall through the connecting rod devices of the driving shaft 100 and the driven shaft 200. The lateral force components given to the lifting frame 510 by the first guide block 103 driven by the driving shaft and the second guide block 203 driven by the driven shaft are also opposite and can offset each other, so that the overall lateral force components of the first guide block 103 and the second guide block 203 on the lifting frame 510 will not be transmitted to the guide column 530 of the vehicle body, and the lifting frame 510 can rise or fall smoothly relative to the guide column without being affected by the mutual friction of lateral extrusion.

[0036] There are many methods and approaches to implement the technical solution of the present invention, and the above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A walking trolley with a chain drive device, the chain drive device comprising a driving shaft and a driven shaft arranged parallel to the driving shaft; the driving shaft is provided with a coaxial first driving gear and a second driving gear, and the driven shaft is provided with a coaxial first driven gear and a second driven gear; characterized in that: A first section of chain is wound around the first driving gear and the first driven gear, and a second section of chain is wound around the second driving gear and the second driven gear, one end of the first section of chain extends from above the first driving gear and extends from below the first driven gear and is wound around the first driven gear; one end of the second section of chain extends from below the second driving gear and extends from above the second driven gear and is wound around the second driven gear; The walking trolley includes a vehicle body, a lifting frame, and wheels located outside the vehicle body; vertical guide columns are provided on both sides of the upper part of the vehicle body, and guide sliders cooperating with the guide columns are provided on the sides of the lifting frame, and the lifting frame moves up and down along the guide columns along with the guide sliders; a hollow receiving cavity is provided below the lifting frame, and the two sides of the receiving cavity are the two side walls of the lifting frame, and the chain drive device is installed on the upper surface of the vehicle body and is located in the receiving cavity; both ends of the driving shaft are provided with a first connecting rod device, and one end of the first connecting rod device is fixedly connected to the driving shaft, and a first guide block is provided on the outside of the other end of the first connecting rod device; both ends of the driven shaft are provided with a second connecting rod device, and the second connecting rod device One end of the rod device is fixedly connected to the driven shaft, and a second guide block is provided on the outer side of the other end of the second connecting rod device; two side walls of the lifting frame are provided with a first guide groove matched with the first guide block and a second guide groove matched with the second guide block; the first guide block and the second guide block move together under the drive of the driving shaft and the driven shaft, and the rotation directions of the first guide block and the second guide block when they move together are opposite, when the first guide block and the second guide block rotate together to the first position, the lifting frame moves downward to a position close to the vehicle body, and when the first guide block and the second guide block rotate together to a second position higher than the first position, the lifting frame moves upward to a position away from the vehicle body; The two ends of the first chain section are fixed on the first driving gear and the first driven gear, and the two ends of the second chain section are fixed on the second driving gear and the second driven gear, so the driving shaft and the driven shaft cannot rotate continuously for one circle, but can only rotate at an angle less than one circle; so that the driving shaft and the driven shaft rotate forward or reverse 180°; The first guide block includes a first cylindrical shaft fixed on the first connecting rod device and a first block surrounding the first cylindrical shaft, the first cylindrical shaft and the first block are connected by a bearing, and the first block is arranged in the first guide groove; the second guide block includes a second cylindrical shaft fixed on the second connecting rod device and a second block surrounding the second cylindrical shaft, the second cylindrical shaft and the second block are connected by a bearing, and the second block is arranged in the second guide groove; the outer edge contours of the first block and the second block are both square, and the height of the first block is consistent with the height of the first guide groove, and the height of the second block is consistent with the height of the second guide groove.

2. The traveling trolley according to claim 1, characterized in that: A first tensioning gear, a first bracket carrying the first tensioning gear, a second tensioning gear, and a second bracket carrying the second tensioning gear are also provided between the driving shaft and the driven shaft. The first tensioning gear is located above the first section of the chain and is pressed down to engage with the first section of the chain; the second tensioning gear is located above the second section of the chain and is lifted up to engage with the second section of the chain.

3. The traveling trolley according to claim 1 or 2, characterized in that: The power output shaft is provided with an output gear, the driving shaft is provided with an input gear matched with the output gear, and the output gear and the input gear are driven by a chain.

4. The traveling trolley according to claim 3, characterized in that: The power output shaft is connected to a motor system, which includes a drive motor and a reducer, and the power output shaft is the output shaft of the reducer.

5. The traveling trolley according to claim 1, characterized in that: The first guide groove extends laterally, and when the first guide block rotates with the driving shaft, the first guide block moves back and forth laterally in the first guide groove; the second guide groove extends laterally relative to the first guide groove, and when the second guide block rotates with the driven shaft, the second guide block moves back and forth laterally in the second guide groove.

6. The traveling trolley according to claim 1, characterized in that: The guide column and the guide slide block are guided by the slide rail and the slide groove for receiving the slide rail. The slide rail and the slide groove are respectively arranged on the guide column and the guide slide block.

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