Automatic work tool for distributing elevator counterweights
By combining vibratory feeding and a transfer mechanism, the problem of uneven concrete distribution in elevator counterweight production was solved, achieving uniform distribution and consistent weight of concrete within the steel shell, thus improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN ELEVATOR ELEVATOR PARTS
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-09
Smart Images
Figure CN224334686U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevator counterweight production technology, and in particular to an automatic material dispensing tool for elevator counterweights. Background Technology
[0002] The main material of elevator counterweights is usually concrete. During the filling process, the common operation is to feed the material through the on-site hopper and manually distribute and smooth the concrete material in each steel shell. This is labor-intensive. Furthermore, due to the uneven distribution of concrete particles, the fine material is added first and then the coarse material, resulting in uneven filling in the steel shells before and after filling, and a large difference in weight.
[0003] Therefore, in order to address the above problems, this utility model urgently needs to provide an automatic material distribution tool for elevator counterweights. Utility Model Content
[0004] The purpose of this utility model is to provide an automatic material distribution tool for elevator counterweight blocks. Vibration feeding ensures uniform particle size within each steel plate shell, and the pulling distribution plate can evenly disperse concrete within each steel plate shell, reducing the time required for manual material pushing and smoothing, and improving production efficiency.
[0005] An elevator counterweight dispensing fixture includes a support frame on which a vibrating table is mounted; the vibrating table has upwardly extending side baffles on opposite sides and two spaced guide rails, with the ends of each guide rail fixed to the corresponding side baffles; two spaced dispensing plates are slidably mounted on the two guide rails, and a gap for placing counterweight molds is provided between the lower end of the dispensing plates and the upper surface of the vibrating table.
[0006] It also includes a transfer mechanism mounted on the bracket. The transfer mechanism is fixed to the material distribution plate and is used to drive the material distribution plate to move repeatedly along the guide rail, pushing the concrete particles poured on the vibrating table into each counterweight mold.
[0007] Furthermore, the migration mechanism includes a reciprocating motor fixed to one side of the support along its length, a first pulley installed at the top of each of the two side baffles, and a second pulley installed on the side of the support away from the reciprocating motor. The second pulley and the first pulley on the same side are located on the same vertical plane. It also includes a first cable and a second cable. The first cable starts from the opposite outer side of the material distribution plate near the reciprocating motor, first passes around the first pulley near the reciprocating motor, then wraps around the output shaft of the reciprocating motor multiple times, and then passes around the second pulley and the remaining first pulley in sequence before being fixed to the opposite outer side of the material distribution plate away from the reciprocating motor. The two ends of the second cable are fixed to the opposite inner sides of the two material distribution plates respectively.
[0008] Furthermore, infrared sensors are installed at the top of the two side baffles to detect the gap between the corresponding side distribution plate and the side baffle; multiple weight sensors are also installed at intervals on the upper surface of the vibration table; a controller is also included, with the infrared sensors electrically connected to the controller, the reciprocating motor electrically connected to the controller; each weight sensor is electrically connected to the controller, and the reciprocating motor and the vibration table are all electrically connected to the controller.
[0009] Furthermore, the upper surface of the vibration table is symmetrically provided with material distribution buffer zones along the length direction, and the outer sides of the two material distribution buffer zones are respectively connected to the corresponding side baffles; the upper surface of each material distribution buffer zone is at the same height as the lower end of each material distribution plate.
[0010] Furthermore, the rear side of the vibration table is provided with an alignment baffle extending upwards, and the two ends of the alignment baffle are connected to the baffles on both sides respectively.
[0011] Furthermore, a front baffle extends upward from the front side of the vibration table. The bottom end of the front baffle is hinged to the vibration table, and both ends of the front baffle are respectively connected to the side baffles.
[0012] Furthermore, it also includes multiple sets of matching inserts, pin sleeves and pin bodies, with the pin sleeves vertically installed on the front side of the vibration table, and the top of the pin body extending upwards and abutting against the front baffle.
[0013] Furthermore, the height of the two side baffles is 230mm, the height of the alignment baffle is 430mm, the height of the front baffle is 150mm, and the distance between the upper surface of the vibrating table and the lower surface of the material distribution plate is 30mm.
[0014] Furthermore, the model of the vibration motor is YZU-2-5, and the model of the reciprocating motor is JK1.5T25.
[0015] Furthermore, both the first and second pulleys are model 8D7KHL.
[0016] The elevator counterweight distribution fixture provided by this utility model has the following advantages compared with the prior art:
[0017] This utility model provides an elevator counterweight block material distribution fixture. After concrete is poured between two distribution plates, a transfer mechanism pulls the distribution plates to move left and right along the guide rail, thereby evenly distributing the concrete into each counterweight block mold. Simultaneously, this utility model includes a vibration table to ensure uniform particle distribution in the concrete, resulting in approximately the same weight of concrete in each counterweight block mold. This utility model also includes a material distribution buffer zone. When there is undistributed concrete between the two distribution plates, all undistributed concrete can be pushed to the upper surface of the buffer zone, thus smoothing the upper surface of the concrete in the outermost counterweight block mold and preventing protruding stones from obstructing the distribution plates when they are turned back. This utility model uses vibration feeding to ensure uniform particle size in each counterweight block mold, and by pulling the distribution plates, it can evenly distribute the concrete in each counterweight block mold, reducing manual pushing and smoothing time and improving production efficiency. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram (perspective view) of the first embodiment of the elevator counterweight block material distribution fixture described in this utility model;
[0020] Figure 2 This is a schematic diagram (perspective view) from another angle of the first embodiment of the elevator counterweight block material distribution fixture described in this utility model;
[0021] Figure 3 This is a schematic diagram (perspective view) of the second embodiment of the elevator counterweight block material distribution fixture described in this utility model;
[0022] Figure 4 This is a schematic diagram (perspective view) from another angle of the second embodiment of the elevator counterweight block material distribution fixture described in this utility model;
[0023] Figure 5 This is a control flowchart of the elevator counterweight distribution tool described in this utility model.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1. Support frame; 2. Vibrating table; 4. Side baffle; 5. Guide rail; 6. Material distribution plate; 7. Reciprocating motor; 8. First pulley; 9. Second pulley; 10. First cable; 11. Material distribution buffer zone; 12. Alignment baffle; 13. Front baffle; 14. Pin sleeve; 15. Pin body; 16. Second cable. Detailed Implementation
[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0027] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present invention provides an elevator counterweight material distribution fixture, including a bracket 1, on which a vibrating table 2 is mounted; the vibrating table 2 has upwardly extending side baffles 4 on opposite sides, and also includes two spaced guide rails 5, with the two ends of each guide rail 5 fixedly connected to the corresponding side baffles 4; two spaced material distribution plates 6 are slidably mounted on the two guide rails 5, and a gap for placing the counterweight mold is provided between the lower end of the material distribution plate 6 and the upper surface of the vibrating table 2.
[0030] It also includes a migration mechanism installed on the bracket 1. The migration mechanism is fixed to the material distribution plate 6 and is used to drive the material distribution plate 6 to move repeatedly along the guide rail 5, pushing the concrete particles poured on the vibrating table 2 into each counterweight mold.
[0031] The elevator counterweight distribution fixture provided by this utility model pours concrete between two distribution plates 6, and then a transfer mechanism pulls the distribution plates 6 to move left and right along the guide rail 5, thereby evenly distributing the concrete into each counterweight mold. Simultaneously, this utility model includes a vibration table 2 to ensure uniform particle distribution in the concrete, resulting in approximately the same weight of concrete in each counterweight mold. This utility model also includes a distribution buffer zone 11. When there is still undistributed concrete between the two distribution plates 6, all undistributed concrete can be pushed to the upper surface of the distribution buffer zone 11, thereby smoothing the upper surface of the concrete in the outermost counterweight mold and preventing protruding stones from obstructing the distribution plates 6 when they fold back. This utility model ensures uniform particle distribution in each counterweight mold through vibration feeding, and the pulling of the distribution plates 6 evenly disperses the concrete in each counterweight mold, reducing manual pushing and smoothing time and improving production efficiency.
[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the migration mechanism includes a reciprocating motor 7 fixed to one side of the support 1 along its length. First pulleys 8 are respectively installed on the top of the two side baffles 4. A second pulley 9 is also installed on the side of the support 1 away from the reciprocating motor 7. The second pulley 9 and the first pulley 8 on the same side are located on the same vertical plane. It also includes a first cable 10 and a second cable 16. The first cable 10 starts from the opposite outer side of the material distribution plate 6 close to the reciprocating motor 7, first passes around the first pulley 8 close to the reciprocating motor 7, then wraps around the output shaft of the reciprocating motor 7 multiple times, and then passes around the second pulley 9 and the remaining first pulley 8 in sequence before being fixed to the opposite outer side of the material distribution plate 6 away from the reciprocating motor 7. The two ends of the second cable 16 are respectively fixed to the opposite inner sides of the two material distribution plates 6.
[0033] In this utility model, after the first cable 10 is tightly wound around the output shaft of the reciprocating motor 7, the direction is changed multiple times by the first pulley 8 and the second pulley 9, so that by rotating the output shaft of the reciprocating motor 7, the material distribution plate 6 can be pulled to move towards the two first pulleys 8 respectively, so that the material distribution plate 6 can slide left and right along the guide rail 5 to automatically fill and smooth the concrete in each counterweight mold.
[0034] like Figure 5 As shown, infrared sensors are provided at the top of the two side baffles 4 to detect the gap between the corresponding side distribution plate 6 and the side baffle 4; multiple weight sensors are also installed at intervals on the upper surface of the vibration table 2; it also includes a controller, the infrared sensors are electrically connected to the controller, the reciprocating motor 7 is electrically connected to the controller; each weight sensor is electrically connected to the controller, and the reciprocating motor 7 and the vibration table 2 are all electrically connected to the controller.
[0035] In this invention, when the output shaft of the reciprocating motor 7 rotates, driving the left distribution plate 6 to move close to the left side baffle 4 or the right distribution plate 6 to move close to the right side baffle 4, the infrared sensor sends a signal to the controller. The controller controls the output shaft of the reciprocating motor 7 to rotate in the opposite direction, thereby realizing the reciprocating movement of the distribution plate 6 along the guide rail 5. When the distribution plate 6 evenly distributes the concrete into each counterweight mold, and the weight received by each weight sensor is consistent, a signal is sent to the controller. The controller controls the reciprocating motor 7 and the vibration table 2 to stop, and each counterweight mold can be removed to obtain a counterweight with uniform distribution.
[0036] like Figure 3 , Figure 4 As shown, the upper surface of the vibration table 2 is symmetrically provided with material distribution buffer zones 11 along the length direction, and the outer sides of the two material distribution buffer zones 11 are respectively connected to the corresponding side baffles 4; the upper surface of each material distribution buffer zone 11 is at the same height as the lower end of each material distribution plate 6.
[0037] In this invention, when the two material distribution plates 6 move to the material distribution buffer zone 11, if there is still undistributed concrete between the two material distribution plates 6, since the upper surface of each material distribution buffer zone 11 is at the same height as the lower end of each material distribution plate 6, all the undistributed concrete can be pushed to the upper surface of the material distribution buffer zone 11, thereby smoothing the upper surface of the concrete in the outermost counterweight mold and preventing protruding stones from blocking the material distribution plates when the material distribution plates 6 turn back; when the material distribution plates 6 continue to move forward and approach the side baffle 4, after the output shaft of the reciprocating motor 7 rotates in the opposite direction, the undistributed concrete is moved out from the upper surface of the material distribution buffer zone 11 and continues to be distributed into each counterweight mold.
[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the rear side of the vibration table 2 is also provided with an alignment baffle 12 extending upward, and the two ends of the alignment baffle 12 are respectively connected to the two side baffles 4.
[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the front side of the vibration table 2 is also provided with a front baffle 13 extending upward. The bottom end of the front baffle 13 is hinged to the vibration table 2, and the two ends of the front baffle 13 are respectively connected to the two side baffles 4.
[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it also includes multiple sets of matching insert pin sleeves 14 and pin bodies 15. The pin sleeves 14 are vertically installed on the front side of the vibration table 2, and the top of the pin body 15 extends upward and abuts against the front baffle 13.
[0041] In this utility model, when it is necessary to place the counterweight mold or to remove the counterweight mold after material distribution, the main body 15 of the pin is pulled out from the pin sleeve 14, and the front baffle 13 is flipped downwards to perform the placement or removal operation; after placing the counterweight mold into the counterweight mold placement gap, one end of each counterweight mold can be pressed against the alignment baffle 12 to align the counterweight molds and prevent concrete from falling outside the counterweight mold.
[0042] In this embodiment, the height of the two side baffles 4 is 230mm, the height of the alignment baffle 12 is 430mm, the height of the front baffle 13 is 150mm, and the distance between the upper surface of the vibration table 2 and the lower end surface of the material distribution plate 6 is 30mm.
[0043] In this embodiment, the vibration motor is model YZU-2-5, and the reciprocating motor 7 is model JK1.5T25.
[0044] In this embodiment, both the first pulley 8 and the second pulley 9 are model 8D7KHL.
[0045] First implementation example Figure 1 , Figure 2 As shown:
[0046] An elevator counterweight distribution tooling includes a bracket 1, on which a vibrating table 2 is mounted; the vibrating table 2 has upwardly extending side baffles 4 on opposite sides, and also includes two spaced guide rails 5, with the two ends of each guide rail 5 fixedly connected to the corresponding side baffles 4; two spaced distribution plates 6 are slidably mounted on the two guide rails 5, and a gap for placing the counterweight mold is provided between the lower end of the distribution plate 6 and the upper surface of the vibrating table 2.
[0047] It also includes a migration mechanism installed on the bracket 1. The migration mechanism is fixed to the material distribution plate 6 and is used to drive the material distribution plate 6 to move repeatedly along the guide rail 5, pushing the concrete particles poured on the vibrating table 2 into each counterweight mold.
[0048] The implementation of the first embodiment includes the following steps:
[0049] 1) Place multiple counterweight molds arranged closely along the direction of the guide rail 5 between the lower end of the material distribution table 6 and the upper surface of the vibration table 2.
[0050] 2) Pour an appropriate amount of concrete into the inner side of the two material distribution plates 6 of the elevator counterweight block material distribution fixture;
[0051] 3) The output axis of the reciprocating motor 7 rotates on one side, driving each material distribution plate 6 to move on one side of the guide rail 5, and sequentially distributing concrete into each counterweight block mold on that side.
[0052] 4) When the material distribution plate 6 approaches the outermost counterweight mold, there is still undistributed concrete between the two material distribution plates 6. The output shaft of the reciprocating motor 7 rotates in the opposite direction, driving each material distribution plate 6 to move to the other side of the guide rail 5, and distributing the concrete into each counterweight mold on the other side in sequence.
[0053] 5) Repeat steps 3-4 until each weight sensor detects that the weights in all the counterweight molds are consistent, thus completing the counterweight mold material distribution.
[0054] Second implementation example Figure 3 , Figure 4 As shown:
[0055] An elevator counterweight distribution tooling includes a bracket 1, on which a vibrating table 2 is mounted; the vibrating table 2 has upwardly extending side baffles 4 on opposite sides, and also includes two spaced guide rails 5, with the two ends of each guide rail 5 fixedly connected to the corresponding side baffles 4; two spaced distribution plates 6 are slidably mounted on the two guide rails 5, and a gap for placing the counterweight mold is provided between the lower end of the distribution plate 6 and the upper surface of the vibrating table 2.
[0056] It also includes a migration mechanism installed on the bracket 1. The migration mechanism is fixedly connected to the material distribution plate 6 and is used to drive the material distribution plate 6 to move repeatedly along the guide rail 5, pushing the concrete particles poured on the vibrating table 2 into each counterweight mold.
[0057] The upper surface of the vibration table 2 is symmetrically provided with material distribution buffer zones 11 along the length direction. The outer sides of the two material distribution buffer zones 11 are respectively connected to the corresponding side baffles 4. The upper surface of each material distribution buffer zone 11 is at the same height as the lower end of each material distribution plate 6.
[0058] The second embodiment includes the following steps:
[0059] 1) Place multiple counterweight molds arranged closely along the direction of the guide rail 5 between the lower end of the material distribution table 6 and the upper surface of the vibration table 2.
[0060] 2) Pour an appropriate amount of concrete into the inner side of the two material distribution plates 6 of the elevator counterweight block material distribution fixture;
[0061] 3) The output axis of the reciprocating motor 7 rotates on one side, driving each material distribution plate 6 to move on one side of the guide rail 5, and sequentially distributing concrete into each counterweight block mold on that side.
[0062] 4) When the material distribution plate 6 approaches the outermost counterweight mold, there is still undistributed concrete between the two material distribution plates 6. At this time, the material distribution plate 6 continues to move. Since the upper surface of each material distribution buffer zone 11 is at the same height as the lower end of each material distribution plate 6, all the undistributed concrete can be pushed to the upper surface of the material distribution buffer zone 11. At the same time, the upper surface of the concrete in the outermost counterweight mold is scraped flat to prevent protruding stones from blocking the material distribution plate when the material distribution plate 6 turns back. When the material distribution plate 6 continues to move forward and approaches the side baffle 4, the output shaft of the reciprocating motor 7 rotates in the opposite direction, which moves the undistributed concrete from the upper surface of the material distribution buffer zone 11, causing each material distribution plate 6 to move to the other side of the guide rail 5, and distributing the concrete into each counterweight mold on the other side in sequence. The operation is the same for the material distribution buffer zone 11 on the other side.
[0063] 5) Repeat steps 3-4 until each weight sensor detects that the weights in all the counterweight molds are consistent, thus completing the counterweight mold material distribution.
[0064] In this invention, when the two material distribution plates 6 move to the material distribution buffer zone 11, if there is still undistributed concrete between the two material distribution plates 6, since the upper surface of each material distribution buffer zone 11 is at the same height as the lower end of each material distribution plate 6, all the undistributed concrete can be pushed to the upper surface of the material distribution buffer zone 11, thereby smoothing the upper surface of the concrete in the outermost counterweight mold and preventing protruding stones from blocking the material distribution plates when the material distribution plates 6 turn back; when the material distribution plates 6 continue to move forward and approach the side baffle 4 and then move in the opposite direction, the undistributed concrete is removed from the upper surface of the material distribution buffer zone 11 and continues to be distributed into each counterweight mold.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. An automatic material dispensing fixture for elevator counterweights, characterized in that: Includes a bracket (1), on which a vibration table (2) is mounted; the vibration table (2) has upwardly extending side baffles (4) on opposite sides, and also includes two spaced guide rails (5), with the two ends of each guide rail (5) fixedly connected to the corresponding side baffles (4); two spaced material distribution plates (6) are slidably mounted on the two guide rails (5), and a gap for placing the counterweight mold is provided between the lower end of the material distribution plate (6) and the upper surface of the vibration table (2); It also includes a transfer mechanism installed on the bracket (1), which is fixed to the material distribution plate (6) and is used to drive the material distribution plate (6) to move repeatedly along the guide rail (5) to push the concrete particles poured on the vibrating table (2) into each counterweight mold.
2. The automatic workpiece distributing tooling for elevator counterweight blocks of claim 1, wherein: The migration mechanism includes a reciprocating motor (7) fixed to one side of the support (1) along the length direction, and first pulleys (8) installed on the top of the two side baffles (4). A second pulley (9) is also installed on the side of the support (1) away from the reciprocating motor (7). The second pulley (9) and the first pulley (8) on the same side are located on the same vertical plane. It also includes a first cable (10) and a second cable (16). The first cable (10) starts from the opposite outer side of the material distribution plate (6) close to the reciprocating motor (7), first passes around the first pulley (8) close to the reciprocating motor (7), then winds around the output shaft of the reciprocating motor (7) multiple times, and then passes around the second pulley (9) and the remaining first pulley (8) in sequence before being fixed to the opposite outer side of the material distribution plate (6) away from the reciprocating motor (7). The two ends of the second cable (16) are fixed to the opposite inner sides of the two material distribution plates (6).
3. The automatic workpiece distributing tooling for elevator counterweight blocks of claim 2, wherein: Infrared sensors are provided at the top of the two side baffles (4) to detect the gap between the corresponding side distribution plate (6) and the side baffle (4); multiple weight sensors are also installed at intervals on the upper surface of the vibration table (2); a controller is also included, the infrared sensors are electrically connected to the controller, the reciprocating motor (7) is electrically connected to the controller; each weight sensor is electrically connected to the controller, and the reciprocating motor (7) and the vibration table (2) are all electrically connected to the controller.
4. The automatic workpiece distributing tooling for elevator counterweight blocks of claim 3, wherein: The upper surface of the vibration table (2) is symmetrically provided with material distribution buffers (11) along the length direction. The outer sides of the two material distribution buffers (11) are respectively connected to the corresponding side baffles (4); the upper surface of each material distribution buffer (11) is at the same height as the lower end of each material distribution plate (6).
5. The automatic work tool for the elevator counterweight according to claim 4, characterized in that: The rear side of the vibration table (2) is also provided with an alignment baffle (12) extending upward, and the two ends of the alignment baffle (12) are connected to the two side baffles (4) respectively.
6. The automatic workpiece handling apparatus of claim 5, wherein: The front side of the vibration table (2) is also provided with a front baffle (13) extending upward. The bottom end of the front baffle (13) is hinged to the vibration table (2), and the two ends of the front baffle (13) are respectively connected to the two side baffles (4).
7. The automatic workpiece handling system of claim 6, wherein: It also includes multiple sets of matching inserts (14) and insert bodies (15). The inserts (14) are vertically installed on the front side of the vibration table (2), and the top of the insert body (15) extends upward and abuts against the front baffle (13).
8. The automatic workpiece handling system of claim 7, wherein: The height of the two side baffles (4) is 230 mm, the height of the alignment baffle (12) is 430 mm, the height of the front baffle (13) is 150 mm, and the distance between the upper surface of the vibrating table (2) and the lower end surface of the distribution plate (6) is 30 mm.
9. The automatic workpiece handling system of claim 8, wherein: The model of the vibrating motor is YZU-2-5, and the model of the reciprocating motor (7) is JK1.5T25.
10. The automatic workpiece handling system of claim 9, wherein: The models of the first pulley (8) and the second pulley (9) are both 8D7KHL.