An automatic return line for a trolley

Abstract

An automatic return line for a trolley, comprising chain devices in a ring shape respectively arranged on two parallel brackets. A front frame and a rear frame are provided at the front end and the rear end of the brackets. Both ends of the chain devices are driven by reversing gears and pushing gears to form a circulating drive for the chain devices; a motor is provided in one of the rear frames, and the motor drives a transmission rod to rotate. The two ends of the transmission rod respectively drive the pushing sprockets in the rear frame, driving the two chain devices to synchronously drive in the brackets on both sides; a plurality of pushing blocks capable of abutting against the trolley are respectively provided on each chain device, and the trolley is driven by the chain device to be pushed between the two brackets; a guide rail assembly is further arranged above the transmission rod at the end between the two brackets. After the trolley moves uphill through the guide rail from the front of the rear frame, it slides down after passing through the rear frame to complete the transportation. The invention can enable multiple trolleys to be automatically transported, reducing the labor intensity of workers while improving the efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of food production equipment, and more particularly to an automatic return line for a cart. Background Art

[0002] In the daily production process of food production workshops, food carts are indispensable for transportation. After use, the food carts need to be returned to their original positions for recycling. At this time, manual labor is required to pull the carts to their original positions, which is labor-intensive. The transportation distance of food carts is also long, and manual labor can only pull one food cart at a time, which is inefficient. Furthermore, if the cart is high, there will be certain safety issues when it is frequently pushed back and forth by manual labor. Summary of the invention

[0003] The object of the present invention is to provide an automatic return line for a cart, which can enable multiple carts to be automatically transported, thereby reducing the intensity of manual labor and improving efficiency.

[0004] In order to achieve the above object, the solution of the present invention is:

[0005] An automatic return line for a cart comprises two linear brackets arranged in parallel, each bracket is provided with a ring-shaped chain device, the front end and the rear end of the bracket are respectively provided with a front frame and a rear frame, the front bracket is provided with a reversing gear, the rear frame is provided with a driving sprocket, the reversing gear and the driving gear are respectively located at both ends of the chain device to drive the chain device to form a circular transmission;

[0006] It also includes a power device, which includes a motor in one of the rear frames, the motor drives a transmission rod located between the two rear frames to rotate, and the two ends of the transmission rod respectively drive the push sprockets in the rear frames, driving the two chain devices to synchronously drive in the brackets on both sides;

[0007] A plurality of push blocks capable of supporting the cart are respectively arranged on the chains of each chain device, and the push blocks in the two chain devices are arranged correspondingly, so that the two push blocks synchronously transmitted to between the two brackets support the same cart, and the cart is driven by the chain device to be pushed between the two brackets;

[0008] A guide rail assembly is also provided at the end between the two brackets and mounted above the transmission rod. The guide rail assembly includes two parallel guide rails respectively located on the inner sides of the brackets. After the cart moves uphill from the front of the rear frame via the guide rails, it slides down after passing the rear frame to complete the transportation.

[0009] Furthermore, a protective pad is provided on the pushing block.

[0010] Further, the pushing block is detachably connected to the chain plate of the chain.

[0011] Furthermore, a support frame for supporting the guide rail is provided between the two rear frames. The support frame includes at least one support rod erected between the two rear frames. The support rod is higher than the transmission rod. At least one positioning hole is provided at each end of the support rod, and a limit pin is provided on the positioning hole. The guide rail is located outside the limit pin.

[0012] Furthermore, the guide rail includes an uphill section, a horizontal section, and a downhill section. A bottom surface for the trolley wheels to pass through is formed on the guide rail, and a retaining surface is formed on the outside of the bottom surface.

[0013] Furthermore, in the rear frame, the driving sprocket is connected to the sprocket shaft and rotates. The power device further includes a motor sprocket and a driven sprocket that mesh with each other. The motor drives the motor sprocket and the driven sprocket to rotate. The driven sprocket and the driving sprocket are located on the same sprocket shaft. The sprocket shaft drives the transmission rod to rotate, and the transmission rod drives the sprocket shaft in the other rear support to rotate. The two driving sprockets rotate synchronously.

[0014] Furthermore, a box body is respectively provided in the two rear supports, and bevel gears are provided in the box body and are respectively meshed with the sprocket shaft and the transmission rod.

[0015] Furthermore, an induction counter and an alarm are installed in the rear frame.

[0016] Furthermore, the support frame includes two parallel support grooves connected between the front frame and the rear frame. Multiple groups of support feet are supported below the support grooves. The chain of the chain device is located in the support grooves, and the chain is a bent plate chain.

[0017] Furthermore, each pushing block is connected to a support column, and the support column is detachably connected to the link plate of the chain.

[0018] After adopting the above structure, the present invention can be applied to the return device of the trolley in production. The trolley is pushed by a single motor and a chain device with bilateral synchronous transmission, optimizing the mechanisms of each device, with reasonable actions and smooth mechanical actions, enabling multiple trolleys to be transported simultaneously, reducing the labor intensity of workers and improving the efficiency at the same time. At the same time, each mechanism can be adjusted to meet the transportation of trolleys of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 1A is Figure 1 a partial enlarged view of A in

[0021] Figure 1B is Figure 1 a partial enlarged view of B in

[0022] Figure 1C is Figure 1 a partial enlarged view of C in

[0023] Figure 2 It is a schematic structural view at the rear bracket in the present invention;

[0024] Figure 3 It is a side view of the present invention;

[0025] Figure 3A is Figure 3 a partial enlarged view at position D in

[0026] Figure 4 It is a top view of the present invention;

[0027] Figure 5 It is a side view of the present invention. Specific embodiments

[0028] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail through specific embodiments below.

[0029] Combined with Figures 1 to 5 as shown, the present invention discloses an automatic return line for a trolley, which includes two linearly arranged brackets 1 arranged in parallel. Each bracket 1 is respectively provided with an annular chain device 2. The front end and the rear end of the bracket are respectively provided with a front frame 11 and a rear frame 12. A reversing gear 111 (such as Figure 1B as shown) is provided in the front bracket 11, and a driving sprocket 121 is provided in the rear frame 12. The reversing gear 111 and the driving gear 121 are respectively located at both ends of each chain device 2 to drive the chain device to form a circulating drive. Among them, each bracket 1 includes two parallel support grooves 13 connected between the front frame 11 and the rear frame 12. Multiple groups of feet 14 are supported below the support grooves 13. The chain 21 in the chain device is located in the support groove 13, and the chain 21 is a bent plate chain.

[0030] To achieve the drive, a power device is further included. The power device includes a motor 31 provided in one of the rear frames 12. The motor 31 drives a transmission rod 32 located between the two rear frames to rotate. As Figure 1A shown, both ends of the transmission rod 32 respectively drive the driving sprockets 121 in the rear frames. The two driving sprockets 121 rotate simultaneously, thereby driving the two chain devices 2 to synchronously drive in the brackets 1 on both sides. In the rear frame, the driving sprocket 123 is connected to the sprocket shaft 124 and rotates (not specifically shown in one of the side views). Combined with Figure 1A and Figure 3AAs shown, the power unit further includes a motor sprocket 122 meshing with a driven sprocket 123. The motor 31 provides power to drive the motor sprocket 122 and the driven sprocket 123 to rotate. The driven sprocket 123 and the driving sprocket 121 are located on the same sprocket shaft 124. After the driven sprocket 123 rotates, the driving sprocket 121 on the same axis rotates. The sprocket shaft 124 drives the linkage rod 32. After the sprocket shaft 124 rotates, it drives the linkage rod 32 to rotate, thereby driving the sprocket shaft in the rear bracket on the other side through the linkage rod 32, realizing the synchronous rotation of the driving sprockets 121 on both sides. A box body can be respectively provided in the two rear brackets 12, and bevel gears are provided in the box body to form meshing connections with the sprocket shaft and the linkage rod respectively (not shown in the figure).

[0031] During operation, the motor starts, and the motor sprocket 122 drives the driven sprocket 123 to act. The sprocket shaft 124 transmits the force to drive the driving sprocket 124 to drive the chain 21 to transmit. The rotating sprocket shaft 124 meshes with the bevel gear at the same time, driving the linkage rod 32 to rotate. In the rear bracket on the other side, when the linkage rod 32 rotates, the bevel gear on the other side starts to mesh at the same time to drive the sprocket shaft 124 to rotate, thereby driving the chain 21 in the bracket on the other side to transmit, realizing the synchronization of the chains on both sides.

[0032] For the transportation of the trolley 4, the front end of the bracket 1 is formed as a pushing end, and the transmission direction of the chain 21 is from the outside of the bracket to the inside of the bracket for transportation, and the two chains 21 located inside the bracket 1 move forward from the front bracket 11 to the rear bracket 12. As Figure 1C shown, a plurality of pushing blocks 22 capable of abutting against the trolley are respectively provided on the chains 21 of each chain device 2. The pushing blocks 22 in the two chain devices 2 are correspondingly arranged, so that the two pushing blocks 22 synchronously transmitted between the two brackets 1 abut against the same trolley 4. The trolley 4 can be pushed between the two brackets 1 by driving of the chain device 2, as Figure 1 shown. At the same time, the pushing block 22 is detachably connected to the link plate of the chain 21, so that the distance between the front and rear two pushing blocks can be adjusted to adapt to trolleys of different lengths. The length of the pushing block 22 can also be selected according to the width of the trolley. If the width of the trolley is small, a pushing block with a longer length can be selected for use. Each pushing block 22 can also be connected to a support column (not shown in the figure), and the support column is detachably connected to the link plate of the chain 21. The height of the support column can be of various sizes, so as to realize the change of the ground clearance height of the pushing block 22 to adapt to food trolleys of different height types, and prevent the vehicle from being prone to tipping due to the too low height of the pushing block. Further, a protective pad (not shown in the figure) can be sleeved on the pushing block 22. After the trolley 4 enters the conveying line, the pushing blocks on the two chains 21 will abut against both sides of the trolley 4, pushing the trolley 4 to move forward. Since the pushing block 22 and both sides of the trolley 4 are in hard contact, the pushing block 22 will be deformed after a long time. After adding the protective pad, the pushing block 22 and both sides of the trolley 4 can be changed to a soft connection, enabling stable use for a long time.

[0033] Further, at the end between the two brackets 1, a guide rail assembly 40 is also provided above the transmission rod. The guide rail assembly includes two parallel guide rails 4 respectively located inside the brackets. After the trolley 4 moves uphill through the guide rails 4 from the front of the rear frame 12, it slides down after passing through the rear frame to complete the transportation. In combination Figure 1 , 1A , Figure 1B and Figure 3 , Figure 4 As shown in, the guide rail 5 includes an uphill section 51, a horizontal section 52, and a downhill section 53. The horizontal section 52 can be located inside the rear bracket. The uphill section 51 and the downhill section 53 are respectively located at the front end and the rear end of the horizontal section. The slope formed by the uphill section can be made not too large and the height from the ground can be appropriate to ensure that the trolley moves uphill smoothly under the action of the pushing block. In addition, there are pushing blocks on both sides of the trolley to push the trolley forward, which is equivalent to protecting the trolley from the rear to move forward, and can ensure that the trolley passes through the guide rail smoothly. To allow the wheels of the trolley 4 to pass through, a bottom surface 501 for the trolley wheels to pass through is formed on the guide rail 5, and a retaining surface 502 is formed on the outside of the bottom surface. A support frame for supporting the guide rail is also provided between the two rear frames 12. The support frame includes at least one support rod 61 erected between the two rear frames, making the support rod 61 higher than the transmission rod 32. At least one positioning hole 611 is provided at both ends of the support rod 61, and a limit nail 62 is provided on the positioning hole. The horizontal section 52 in the guide rail 5 is located outside the limit nail 62, so that the distance between the two guide rails 5 can be widened and the distance between the two guide rails 5 can be changed to adapt to trolleys of different widths.

[0034] Further, an induction counter and an alarm (not shown in the figure) can be additionally installed in the rear frame 12. The induction counter and the alarm can be connected to a controller provided in the motor. By sensing the trolley 4 passing through the rear frame 12, the number of trolleys passing through is automatically recorded. After reaching the specified number, an instruction can be sent to stop the movement of the entire conveyor line, and at the same time the alarm gives an alarm to avoid excessive stretching of the chain caused by excessive stacking of trolleys.

[0035] When the present invention is in use, the trolley 4 in the food workshop is pushed to the front of the trolley automatic return line of the present invention and is pushed into the space between the two front frames 11. The trolley 4 is resisted by the pushing block 22 and at the same time is pushed forward under the pushing action of the synchronous chains 21 on both sides. When it reaches the end of the bracket, it moves uphill through the guide rail assembly 40 in front of the rear frame 12 and then slides down after passing through the rear frame to complete the transportation. In this way, multiple trolleys can be transported simultaneously on the return line.

[0036] The present invention can be applied to the turning-back device of the trolley in production. Through the design of the overall structure, a single motor and a chain device with bilateral synchronous transmission are used to push the trolley. The mechanisms of each device are optimized, the actions are reasonable, and the mechanical actions are smooth, enabling multiple trolleys to be transported simultaneously, reducing the labor intensity of workers while improving the efficiency. At the same time, each mechanism can be adjusted to meet the transportation of trolleys of different sizes.

[0037] The above embodiments and diagrams do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the relevant technical field shall be regarded as not departing from the patent scope of the present invention.

Claims

1. An automatic return line for a trolley, characterized in that: It includes two linear brackets arranged in parallel. Each bracket is respectively provided with an annular chain device. The front end and the rear end of the bracket are respectively provided with a front frame and a rear frame. A reversing gear is arranged in the front bracket, and a driving sprocket is arranged in the rear frame. The reversing gear and the driving gear are respectively located at both ends of the chain device to push the chain device to form a cyclic drive; It further includes a power device. The power device includes a motor arranged in one of the rear frames. The motor drives a transmission rod located between the two rear frames to rotate. The two ends of the transmission rod respectively drive the driving sprockets in the rear frames to drive the two chain devices to synchronously drive in the brackets on both sides; A plurality of pushing blocks capable of abutting against the trolley are respectively arranged on the chains of the two chain devices. The pushing blocks in the two chain devices are arranged correspondingly, so that the two pushing blocks synchronously transmitted between the two brackets abut against the same trolley, and the trolley is driven by the chain device to be pushed between the two brackets; At the end between the two brackets, a guide rail assembly is further arranged above the transmission rod. The guide rail assembly includes two parallel guide rails respectively located inside the brackets. After the trolley moves uphill through the guide rails from the front of the rear frame, it slides down after passing through the rear frame to complete the transportation; The guide rail includes an uphill section, a horizontal section and a downhill section. A bottom surface for the trolley wheels to pass through is formed on the guide rail, and a retaining surface is formed on the outer side of the bottom surface; In the rear frame, the driving sprocket is connected to the sprocket shaft and rotates. The power device further includes a motor sprocket and a driven sprocket that mesh with each other. The motor drives the motor sprocket and the driven sprocket to rotate. The driven sprocket and the driving sprocket are located on the same sprocket shaft. The sprocket shaft drives the transmission rod to rotate, and the transmission rod drives the sprocket shaft in the other rear bracket to rotate, and the driving sprockets on both sides rotate synchronously; The bracket includes two parallel support grooves connected between the front frame and the rear frame. Multiple groups of support feet are supported below the support grooves, and the chain of the chain device is located in the support grooves.

2. The automatic return line of a trolley as described in claim 1, wherein: A protective pad is sleeved on the pushing block.

3. The automatic return line of a trolley as claimed in claim 1, characterized in that: The pushing block is detachably connected to the link of the chain.

4. The automatic return line of a trolley as claimed in claim 1, wherein: A support frame for supporting the guide rail is arranged between the two rear frames. The support frame includes at least one support rod arranged between the two rear frames. The support rod is higher than the transmission rod. At least one positioning hole is respectively arranged at both ends of the support rod, and a limit nail is arranged on the positioning hole. The guide rail is located outside the limit nail.

5. The automatic return line of a trolley according to claim 1, characterized in that: A box body is respectively arranged in the two rear brackets. Bevel gears are arranged in the box body and are respectively meshed with the sprocket shaft and the transmission rod.

6. The automatic return line of a trolley as described in claim 1, characterized in that: An induction counter and an alarm are installed in the rear frame.

7. The automatic return line of a trolley as described in claim 1, characterized in that: The chain is a bent plate chain.

8. The automatic return line of a trolley as claimed in claim 1, wherein: Each pushing block is connected to a support column, and the support column is detachably connected to the link of the chain.

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