Assembly line device

Abstract

The utility model relates to the technical field of assembly line equipment, in particular to an assembly line device. The assembly line device comprises a base, a fixed side assembly line, an adjusting side assembly line, an auxiliary mechanism and a centering assembly. The fixed side assembly line and the adjusting side assembly line are installed on the two sides of the base side by side in the transverse direction, and the auxiliary mechanism is installed on the base through the centering assembly and located between the fixed side assembly line and the adjusting side assembly line. The fixed side assembly line is fixedly arranged on the base, and the adjusting side assembly line can transversely move relative to the base. The adjusting side assembly line is connected with the centering assembly and can drive the auxiliary mechanism to move through the centering assembly. The auxiliary mechanism and the adjusting side assembly line are consistent in moving direction, and the ratio of the moving speed is 1: 2. According to the assembly line device, automatic centering of the auxiliary mechanism can be achieved in the width adjusting process, precision is high, time and labor are saved, and adjusting efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flow line equipment technical field, specifically, flow line device. BACKGROUND

[0002] The flow line device is a device for conveying materials, which generally has two parallel flow lines.

[0003] At present, most flow line devices have a width adjustment function, that is, the distance between the two flow lines can be adjusted as needed. The width adjustment function of the flow line device is achieved by manual adjustment in some cases and by automatic adjustment in other cases. However, regardless of whether the width adjustment function is achieved manually or automatically, the auxiliary mechanism (such as a blocking mechanism or a jacking mechanism) between the two flow lines needs to be manually reinstalled and adjusted to maintain the center position as the width between the two flow lines changes. Manual adjustment is not only less accurate, but also time-consuming and labor-intensive, and is less efficient. SUMMARY

[0004] The utility model aims at providing a flow line device to alleviate the technical problems of low adjustment accuracy and efficiency of the auxiliary structure in the prior art.

[0005] The flow line device provided by the utility model comprises a base, a fixed side flow line, an adjustment side flow line, an auxiliary mechanism and a centering assembly.

[0006] The fixed side flow line and the adjustment side flow line are installed side by side along the transverse direction on both sides of the base, the auxiliary mechanism is installed on the base through the centering assembly, and the auxiliary mechanism is located between the fixed side flow line and the adjustment side flow line; the fixed side flow line is fixed to the base, and the adjustment side flow line can move along the transverse direction relative to the base.

[0007] The adjustment side flow line is connected to the centering assembly and can drive the auxiliary mechanism to move through the centering assembly; the auxiliary mechanism moves in the same direction as the adjustment side flow line and the ratio of their moving speeds is 1:2.

[0008] Preferably, as an implementation manner, the centering assembly comprises a moving frame and a first transmission mechanism, the first transmission mechanism comprises a first rack, a second rack and a gear, the auxiliary mechanism is installed on the moving frame, the first rack is installed on the base along the transverse direction, the second rack is installed on the adjustment side flow line along the transverse direction, the first rack and the second rack are arranged in parallel and have opposite tooth sides, the gear is pivoted to the moving frame, and the first rack and the second rack are engaged with the gear.

[0009] Preferably, as an implementation manner, the first transmission mechanism is at least two groups, and the two groups of the first transmission mechanism are respectively arranged at two ends of the moving frame in the longitudinal direction.

[0010] Preferably, as an implementation manner, the base is fixedly provided with a first guide rail extending in the transverse direction, and the moving frame is matched with the first guide rail and can move along the first guide rail.

[0011] And / or, the base is fixedly provided with a second guide rail extending in the transverse direction, and the adjustment side pipeline is matched with the second guide rail and can move along the second guide rail.

[0012] Preferably, as an implementation manner, the pipeline device further comprises a width adjustment driving mechanism connected with the adjustment side pipeline, for driving the adjustment side pipeline to move in the transverse direction.

[0013] Preferably, as an implementation manner, the width adjustment driving mechanism comprises a first rotary driver, a first screw rod and a first nut, the first rotary driver is installed on the base, and the first nut is installed on the adjustment side pipeline; the first rotary driver is connected with the first screw rod for driving the first screw rod to rotate; the first screw rod is matched with the first nut, and the first screw rod is arranged to extend in the transverse direction.

[0014] Preferably, as an implementation manner, the width adjustment driving mechanism further comprises a second screw rod and a second nut, the second nut is installed on the adjustment side pipeline, the second screw rod is matched with the second nut, the second screw rod is connected with the first screw rod through a second transmission mechanism, the first screw rod can drive the second screw rod to rotate through the second transmission mechanism, and the moving speed of the first nut and the second nut is consistent.

[0015] Preferably, as an implementation manner, the second transmission mechanism comprises a synchronous belt, a driving wheel and a driven wheel, the driving wheel and the driven wheel are matched with the synchronous belt, the driving wheel is coaxially fixedly connected with the first screw rod, and the driven wheel is coaxially fixedly connected with the second screw rod.

[0016] And / or, the base is provided with a plurality of supporting blocks, two ends of the first screw rod are respectively pivotally connected with two supporting blocks, and two ends of the second screw rod are respectively pivotally connected with two supporting blocks.

[0017] Preferably, as an implementation manner, the pipeline device further comprises two groups of lifting mechanisms, and the two groups of lifting mechanisms are respectively installed on the fixed side pipeline and the adjustment side pipeline.

[0018] And / or, the auxiliary mechanism comprises a blocking mechanism.

[0019] Preferably, as an implementable mode, the fixed side flow line comprises a second rotary driver, a first belt and a plurality of first transmission wheels, an output shaft of the second rotary driver is fixedly connected with one of the first transmission wheels coaxially, and the plurality of first transmission wheels are matched with the first belt, and the first belt is used for conveying materials.

[0020] And / or, the adjusting side flow line comprises a third rotary driver, a second belt and a plurality of second transmission wheels, an output shaft of the third rotary driver is fixedly connected with one of the second transmission wheels coaxially, and the plurality of second transmission wheels are matched with the second belt, and the second belt is used for conveying materials.

[0021] Compared with the prior art, the beneficial effects of the utility model lie in:

[0022] When the width of the flow line device needs to be adjusted, the adjusting side flow line can be driven to move horizontally until the distance between the adjusting side flow line and the fixed side flow line reaches the target distance; in this process, the moving adjusting side flow line can drive the centering assembly to act, and the action of the centering assembly can drive the auxiliary mechanism to move, that is, the centering assembly can convert the displacement of the adjusting side flow line into the displacement of the auxiliary mechanism, and the moving direction of the auxiliary mechanism is consistent with the moving direction of the adjusting side flow line, and the ratio of the moving speed of the auxiliary mechanism to the moving speed of the adjusting side flow line is 1:2. In this way, as long as the initial position of the auxiliary mechanism is at the center position of the region between the fixed side flow line and the adjusting side flow line, the auxiliary mechanism can always be at the center position of the region between the fixed side flow line and the adjusting side flow line during the adjustment of the distance between the adjusting side flow line and the fixed side flow line, thereby realizing the automatic centering effect.

[0023] Therefore, the flow line device provided by the utility model can realize the automatic centering of the auxiliary mechanism during the width adjustment process, has high precision, saves time and effort, and can improve the adjustment efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only the embodiments of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creating creative labor.

[0025] Figure 1 The utility model provides a flow line device's perspective structure schematic diagram for the embodiment of the utility model;

[0026] Figure 2 The utility model provides a flow line device's plan structure schematic diagram for the embodiment of the utility model;

[0027] Figure 3 Part structure schematic view of pipeline device provided by the embodiment of the utility model;

[0028] Figure 4 For Figure 3 Enlarged view of A part.

[0029] Mark explanation:

[0030] 100-base; 110-first guide rail; 120-second guide rail; 130-supporting block;

[0031] 200-fixed side pipeline; 210-second rotary driver; 220-first belt; 230-first transmission wheel;

[0032] 300-adjustment side pipeline; 310-third rotary driver; 320-second belt; 330-second transmission wheel;

[0033] 400-assistant mechanism;

[0034] 500-centering assembly; 510-moving frame; 520-first transmission mechanism; 521-first rack; 522-second rack; 523-gear;

[0035] 610-first rotary driver; 620-first screw rod; 630-first nut; 640-second screw rod; 650-second nut; 660-synchronous belt; 670-driving wheel; 680-following wheel;

[0036] 700-jacking mechanism. DETAILED DESCRIPTION

[0037] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0038] The utility model will be described further in detail by specific embodiment and in combination with the drawings.

[0039] See Figures 1-4The embodiment provides a pipeline device, which comprises a base 100, a fixed-side pipeline 200, an adjusting-side pipeline 300, an auxiliary mechanism 400 and a centering assembly 500; the fixed-side pipeline 100 and the adjusting-side pipeline 200 are installed side by side on two sides of the base 100 in the transverse direction, the auxiliary mechanism 400 is installed on the base 100 through the centering assembly 500, and the auxiliary mechanism 400 is located between the fixed-side pipeline 200 and the adjusting-side pipeline 300; the fixed-side pipeline 200 is fixed on the base 100, and the adjusting-side pipeline 300 can move in the transverse direction relative to the base 100; the adjusting-side pipeline 300 is connected with the centering assembly 500, and can drive the auxiliary mechanism 400 to move through the centering assembly 500; the auxiliary mechanism 400 moves in the same direction as the adjusting-side pipeline 300 and the speed ratio of the auxiliary mechanism 400 to the adjusting-side pipeline 300 is 1:2.

[0040] When the width of the pipeline device needs to be adjusted, the adjusting-side pipeline 300 can be driven to move in the transverse direction until the distance between the adjusting-side pipeline 300 and the fixed-side pipeline 200 reaches a target distance; in this process, the moving adjusting-side pipeline 300 can drive the centering assembly 500 to act, and the action of the centering assembly 500 can drive the auxiliary mechanism 400 to move, that is, the centering assembly 500 can convert the displacement of the adjusting-side pipeline 300 into the displacement of the auxiliary mechanism 400, and the auxiliary mechanism 400 moves in the same direction as the adjusting-side pipeline 300, and the speed ratio of the auxiliary mechanism 400 to the adjusting-side pipeline 300 is 1:2. In this way, as long as the initial position of the auxiliary mechanism 400 is at the center position of the region between the fixed-side pipeline 200 and the adjusting-side pipeline 300, the auxiliary mechanism 400 can always be at the center position of the region between the fixed-side pipeline 200 and the adjusting-side pipeline 300 in the process of adjusting the distance between the adjusting-side pipeline 300 and the fixed-side pipeline 200, thereby realizing automatic centering.

[0041] Therefore, the pipeline device provided by the embodiment can realize automatic centering of the auxiliary mechanism 400 in the width adjustment process, has high precision, saves time and effort, and can improve the adjusting efficiency.

[0042] The mobile frame 510 and the first transmission mechanism 520 can be arranged in the specific structure of the centering assembly 500. The first transmission mechanism 520 includes a first rack 521, a second rack 522 and a gear 523. The auxiliary mechanism 400 is mounted to the mobile frame 510. The first rack 521 is mounted transversely to the base 100. The second rack 522 is mounted transversely to the adjusting side flow line 300. The first rack 521 is parallel to the second rack 522. The tooth side of the first rack 521 is opposite to the tooth side of the second rack 522. The gear 523 is pivotally connected to the mobile frame 510. The gear 523 is arranged between the first rack 521 and the second rack 522. The first rack 521 and the second rack 522 are engaged with the gear 523. When the adjusting side flow line 300 moves, the second rack 522 moves synchronously. The first rack 521 fixed to the base 100 does not move. The gear 523 rotates and moves with the movement of the second rack 522. The speed ratio of the movement of the gear 523 to the speed of the second rack 522 is 1:2. Thus, the gear 523 can drive the mobile frame 510 to move synchronously with the adjusting side flow line 300. The mobile frame 510 can move at half speed with the adjusting side flow line 300. Thus, the auxiliary mechanism 400 mounted to the mobile frame 510 can be automatically centered. The structure is simple and reliable. Of course, the first transmission mechanism 520 can be power converted by the above-mentioned gear and rack or other half-speed transmission mode.

[0043] Preferably, the first transmission mechanism 520 can be arranged as at least two groups. Two groups of the first transmission mechanism 520 are arranged at two ends of the mobile frame 510 in the longitudinal direction. Thus, the mobile frame 510 can smoothly translate. The risk of the mobile frame 510 being skewed can be greatly reduced. The centering accuracy can be improved.

[0044] Further, the first guide rail 110 extending transversely can be fixedly arranged on the base 100. The mobile frame 510 is matched with the first guide rail 110. The mobile frame 510 can move transversely along the first guide rail 110. The first guide rail 110 can guide and bear the gravity of the mobile frame 510. Thus, the centering accuracy of the mobile frame 510 can be improved. The stability of the movement of the mobile frame 510 can be improved. The first guide rail 110 can be arranged as at least two. The at least two first guide rails 110 are arranged in the longitudinal direction. The guiding and bearing effect of the first guide rail 110 on the mobile frame 510 can be improved. In particular, the first guide rail 110 can be arranged as a sliding rail. The mobile frame 510 is slidingly matched with the first guide rail 110. The bearing effect of the first guide rail 110 on the mobile frame 510 can be ensured.

[0045] The second guide rail 120 extending in the transverse direction can be fixedly arranged on the base 100. The adjustment side flow line 300 is matched with the second guide rail 120, so that the adjustment side flow line 300 can move in the transverse direction along the second guide rail 120. The second guide rail 120 can guide and bear the gravity of the adjustment side flow line 300, so that the moving accuracy of the adjustment side flow line 300 can be improved, and the stability of the movement of the adjustment side flow line 300 can be improved. The second guide rail 120 can be arranged as at least two, and the at least two second guide rails 120 are arranged in the longitudinal direction. The guiding and bearing effect of the second guide rail 120 on the adjustment side flow line 300 can be improved. In particular, the second guide rail 120 can be arranged as a sliding rail. The adjustment side flow line 300 is matched with the second guide rail 120 in sliding mode, so that the bearing effect of the first guide rail 110 on the adjustment side flow line 300 can be ensured. Specifically, the second guide rail 120 is matched with the side plate of the adjustment side flow line 300.

[0046] The width adjustment driving mechanism can be arranged in the specific structure of the flow line device. The width adjustment driving mechanism is connected with the adjustment side flow line 300, so that the adjustment side flow line 300 is driven to move in the transverse direction by the width adjustment driving mechanism. The automatic width adjustment can be realized, time and labor can be saved, and the width adjustment efficiency can be further improved.

[0047] The first rotating driver 610, the first screw rod 620 and the first nut 630 can be arranged in the specific structure of the width adjustment driving mechanism. The first rotating driver 610 is installed on the base 100. The first nut 630 is installed on the adjustment side flow line 300. The first rotating driver 610 is connected with the first screw rod 620, so that the first rotating driver 610 drives the first screw rod 620 to rotate. The first screw rod 620 is matched with the first nut 630, and the first screw rod 620 extends in the transverse direction. The first screw rod 620 drives the first nut 630 to move along the first screw rod 620, so that the first nut 630 drives the adjustment side flow line 300 to move in the transverse direction. Specifically, the first nut 630 can be installed on the side plate of the adjustment side flow line 300. The motor, the rotary electric cylinder, the rotary hydraulic cylinder or the rotary pneumatic cylinder can be used as the first rotating driver 610. Of course, the width adjustment driving mechanism can drive the adjustment side flow line 300 by using the screw rod and the nut, or can drive the adjustment side flow line 300 by using the electric push rod and the like.

[0048] In the specific structure of the width adjustment driving mechanism, the second screw rod 640 and the second nut 650 can be arranged, the second nut 650 is installed on the adjustment side flow line 300, the second screw rod 640 is matched with the second nut 650, the second screw rod 640 is connected with the first screw rod 610 through the second transmission mechanism, the first screw rod 610 can drive the second screw rod 640 to rotate through the second transmission mechanism, and the first nut 630 is arranged to have the same moving speed as the second nut 640. In this way, the adjustment side flow line 300 as a whole can smoothly translate, the risk of the adjustment side flow line 300 being skewed can be greatly reduced, and the width adjustment accuracy can be improved.

[0049] In the specific structure of the second transmission mechanism, the synchronous belt 660, the driving wheel 670 and the driven wheel 680 can be arranged, the driving wheel 670 and the driven wheel 680 are matched with the synchronous belt 660, the driving wheel 670 is coaxially fixedly connected with the first screw rod 610, and the driven wheel 680 is coaxially fixedly connected with the second screw rod 640. In this way, when the first screw rod 610 rotates, the driving wheel 670 can synchronously rotate with the first screw rod 610, the driven wheel 680 can rotate with the driving wheel 670 under the transmission of the synchronous belt 680, so that the second screw rod 640 can synchronously rotate with the driven wheel 680, and the driving of the second screw rod 640 can be realized.

[0050] A plurality of supporting blocks 130 can be arranged on the base 100, the two ends of the first screw rod 620 are respectively pivotally connected with the two supporting blocks 130, and the two ends of the second screw rod 640 are respectively pivotally connected with the two supporting blocks 130. In this way, the stability of the screw rod can be improved. Preferably, the first screw rod 610 is connected with the supporting block 130 through a bearing, and the second screw rod 640 is connected with the supporting block 130 through a bearing, so that the rotation of the first screw rod 620 and the second screw rod 640 is smooth.

[0051] Two groups of jacking mechanisms 700 can also be arranged, and the two groups of jacking mechanisms 700 are respectively arranged on the fixed side flow line 200 and the adjustment side flow line 300, so that the space can be saved. In addition, one group of jacking mechanisms 700 arranged on the adjustment side flow line 300 can move with the adjustment side flow line 300, so that the jacking mechanism 700 can stably lift the material. Specifically, the two groups of jacking mechanisms 700 are respectively arranged on the side plates of the fixed side flow line 200 and the adjustment side flow line 300.

[0052] The auxiliary mechanism 400 can include a blocking mechanism or other mechanisms. The blocking mechanism can be used to block the material.

[0053] In the specific structure of the fixed side flow line 200, the second rotary driver 210, the first belt 220 and a plurality of first transmission wheels 230 can be arranged, the output shaft of the second rotary driver 210 is fixedly connected with one of the first transmission wheels 230 in a coaxial manner, and the plurality of first transmission wheels 230 are matched with the first belt 220, so that the first belt 220 can be driven to convey materials by starting the second rotary driver 210. The motor, rotary electric cylinder, rotary hydraulic cylinder or rotary pneumatic cylinder can be used as the second rotary driver 210.

[0054] In the specific structure of the adjusting side flow line 300, the third rotary driver 310, the second belt 320 and a plurality of second transmission wheels 330 can be arranged, the output shaft of the third rotary driver 310 is fixedly connected with one of the second transmission wheels 330 in a coaxial manner, and the plurality of second transmission wheels 330 are matched with the second belt 320, so that the second belt 320 can be driven to convey materials by starting the third rotary driver 310. The motor, rotary electric cylinder, rotary hydraulic cylinder or rotary pneumatic cylinder can be used as the third rotary driver 310.

[0055] In summary, the flow line device provided by the embodiment of the present application overcomes many technical defects of the conventional flow line device, for example, the adjusting accuracy and efficiency of the auxiliary structure 400 are low. The flow line device provided by the embodiment of the present application can realize automatic centering of the auxiliary structure 400 in the width adjusting process, has high accuracy, saves time and labor, and can improve the adjusting efficiency.

[0056] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pipelined device, characterized by The pipeline device comprises a base, a fixed side pipeline, an adjusting side pipeline, an auxiliary mechanism and a centering assembly; The fixed side pipeline and the adjusting side pipeline are installed side by side along the transverse direction on two sides of the base, the auxiliary mechanism is installed on the base through the centering assembly and is located between the fixed side pipeline and the adjusting side pipeline, the fixed side pipeline is fixed on the base, and the adjusting side pipeline can move along the transverse direction relative to the base; The adjusting side pipeline is connected with the centering assembly and can drive the auxiliary mechanism to move through the centering assembly, the moving direction of the auxiliary mechanism is consistent with that of the adjusting side pipeline, and the speed ratio of the auxiliary mechanism to the adjusting side pipeline is 1:

2.

2. The pipelining device of claim 1, wherein, The centering assembly comprises a moving frame and a first transmission mechanism, the first transmission mechanism comprises a first rack, a second rack and a gear, the auxiliary mechanism is installed on the moving frame, the first rack is installed on the base along the transverse direction, the second rack is installed on the adjusting side pipeline along the transverse direction, the first rack and the second rack are arranged in parallel and have opposite tooth sides, and the gear is pivotally connected to the moving frame, and the first rack and the second rack are in mesh with the gear.

3. The pipelining device of claim 2, wherein, The first transmission mechanism comprises at least two groups, and the two groups of the first transmission mechanism are respectively arranged at two ends of the moving frame along the longitudinal direction.

4. The pipelining device of claim 2, wherein, The base is fixedly provided with a first guide rail extending along the transverse direction, the moving frame is matched with the first guide rail and can move along the first guide rail; And / or, the base is fixedly provided with a second guide rail extending along the transverse direction, the adjusting side pipeline is matched with the second guide rail and can move along the second guide rail.

5. The pipelining device of claim 1, wherein, The pipeline device further comprises a width adjusting driving mechanism connected with the adjusting side pipeline and used for driving the adjusting side pipeline to move along the transverse direction.

6. The pipelining device of claim 5, wherein, The width adjusting driving mechanism comprises a first rotary driver, a first screw rod and a first nut, the first rotary driver is installed on the base, and the first nut is installed on the adjusting side pipeline; the first rotary driver is connected with the first screw rod and used for driving the first screw rod to rotate; and the first screw rod is matched with the first nut and is arranged in extension along the transverse direction.

7. The pipelining device of claim 6, wherein, The width adjusting driving mechanism further comprises a second screw rod and a second nut, the second nut is installed on the adjusting side pipeline, the second screw rod is matched with the second nut, the second screw rod is connected with the first screw rod through a second transmission mechanism, the first screw rod can drive the second screw rod to rotate through the second transmission mechanism, and the moving speed of the first nut is consistent with that of the second nut.

8. The pipelining device of claim 7, wherein, The second transmission mechanism comprises a synchronous belt, a driving wheel and a driven wheel, the driving wheel and the driven wheel are matched with the synchronous belt, the driving wheel is coaxially fixedly connected with the first screw rod, and the driven wheel is coaxially fixedly connected with the second screw rod; And / or, the base is installed with a plurality of supporting blocks, two ends of the first screw rod are pivotally connected with two supporting blocks respectively, and two ends of the second screw rod are pivotally connected with two supporting blocks respectively.

9. The pipelining device of claim 1, wherein, The pipeline device further comprises two sets of lifting mechanisms, and the two sets of lifting mechanisms are respectively arranged on the fixed side pipeline and the adjustable side pipeline. And / or, the auxiliary mechanism comprises a blocking mechanism.

10. The pipelining device according to any of claims 1-9, characterized in that, The fixed side pipeline comprises a second rotating driver, a first belt and a plurality of first transmission wheels, an output shaft of the second rotating driver is coaxially fixed with one of the first transmission wheels, and the plurality of first transmission wheels are matched with the first belt, and the first belt is used for conveying materials. And / or, the adjustable side pipeline comprises a third rotating driver, a second belt and a plurality of second transmission wheels, an output shaft of the third rotating driver is coaxially fixed with one of the second transmission wheels, and the plurality of second transmission wheels are matched with the second belt, and the second belt is used for conveying materials.

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