Steering structure and conveying line

Abstract

The utility model discloses a steering structure and a conveyor line, the steering structure is used for carrying out steering conveying on a bearing piece, the steering structure comprises a supporting piece, a base plate arranged on the supporting piece, a first guide mechanism and a second guide mechanism which are respectively arranged on two sides of the base plate, and rolling pieces arranged on the first guide mechanism and the second guide mechanism. The first guiding mechanism is arranged on the supporting piece and located on one side of the base plate and used for guiding the bearing piece. And the second guide mechanism is arranged on the supporting piece, is positioned on the other side of the substrate and is used for guiding the bearing piece. And the rolling parts are arranged on the first guide mechanism and the second guide mechanism correspondingly, the rolling parts make contact with the bearing part, and when the bearing part moves on the steering structure, rolling friction exists between the bearing part and the rolling parts. According to the steering structure, the friction force borne by the bearing piece in the steering process can be reduced.

Description

Technical Field

[0001] The invention relates to the field of transportation technology, in particular to a steering structure and a conveyor line. Background Art

[0002] The magnetic drive logistics line is divided into a magnetic drive stator and a magnetic drive. The stator is fixed, and the mover can drive the mover to move through the magnetic field force of the stator on the magnetic plate on the mover. In the related art, the branching mode of the mover on the existing magnetic drive logistics line is divided into the mover with wheels and the mover without wheels. The setting of the mover with wheels will result in a situation where it cannot be mixed with the ordinary logistics line, and because the cost of the mover with wheels is high, the cost will increase for occasions where multiple movers are required. In addition, when the bearing wheel on the mover passes through a curve, due to a centripetal force, the bearing wheel is subjected to an axial force. If it is a rubber-coated wheel, the rubber coating is easy to fall off, resulting in a large loss of life, and there is a possibility of friction and powder loss. The structure setting of the mover without wheels generally uses stainless steel or Teflon for the bottom mover guide. When moving, there is sliding friction between the mover and the guide bracket. However, the design using this material is not wear-resistant, and generally can only carry some lighter products. The total weight of the mover plus the product cannot exceed 500g, otherwise the Teflon material will be worn too heavily and cause powder loss. Utility Model Content

[0003] The utility model aims to solve one of the problems of the prior art to at least a certain extent. To this end, the utility model proposes a steering structure that can reduce the friction force on the bearing member during the turning process.

[0004] The utility model also provides a conveying line.

[0005] The steering structure according to the first aspect of the utility model is used to perform steering and conveying of a carrier, and comprises:

[0006] Supports;

[0007] A substrate, the substrate being disposed on the support member;

[0008] A first guiding mechanism, disposed on the supporting member and located on one side of the substrate, for guiding the bearing member;

[0009] A second guiding mechanism, disposed on the supporting member and located on the other side of the substrate, for guiding the carrier;

[0010] A rolling member, wherein the rolling member is respectively arranged on the first guide mechanism and the second guide mechanism, and the rolling member is in contact with the supporting member. When the supporting member moves in the steering structure, rolling friction occurs between the supporting member and the rolling member.

[0011] The steering structure according to the first aspect of the utility model has the following beneficial effects: it can reduce the friction force to which the bearing member is subjected during the turning process. Specifically, in this embodiment, since the first guide mechanism and the second guide mechanism are provided, the bearing member can be guided on both sides of the bearing member respectively. A plurality of rolling members are also provided in the first guide mechanism and the second guide mechanism, and the rolling members can contact with the bottom of the bearing member. In the process of conveying the bearing member, since the rolling part (described later) of the rolling member can roll in all directions, there is rolling friction between the bottom of the bearing member and the rolling member. Compared with the wheel structure and the wheelless structure in the related art, the bearing member can be subjected to less friction force, thereby avoiding the situation in the related art that the bearing member is too severely worn, loses powder due to friction, and cannot carry heavy objects, while increasing the service life of the bearing member and the conveying line as a whole, it can also improve the conveying accuracy and efficiency.

[0012] In some embodiments, the first guide mechanism includes a first guide portion and a second guide portion, the first guide portion contacts the support member, the second guide portion extends along a side of the first guide portion away from the substrate, and the second guide portion is perpendicular to the first guide portion.

[0013] In some embodiments, the second guide mechanism includes a third guide portion and a fourth guide portion, the third guide portion is disposed on a side close to the substrate, and the fourth guide portion is disposed on a side away from the substrate;

[0014] Furthermore, the fourth guide portion is higher than the third guide portion along a direction perpendicular to the top surface of the substrate.

[0015] In some embodiments, the first guide portion and the third guide portion are respectively provided with a plurality of the rolling elements, and the plurality of the rolling elements are arranged at intervals;

[0016] The interval between the rolling elements of the third guide portion is greater than the interval between the rolling elements of the fourth guide portion.

[0017] In some embodiments, the first guide portion has a first surface, the substrate has a second surface, the third guide portion has a third surface, and heights of the first surface and the third surface along a direction perpendicular to the substrate are lower than a height of the second surface.

[0018] In some embodiments, the rolling element is mounted on the first surface and the third surface, and a height of a top surface of the rolling element in a direction perpendicular to the substrate is higher than a height of a top surface of the substrate.

[0019] In some embodiments, the rolling element includes a fixed portion and a rolling portion, the fixed portion is fixedly mounted on the guide portion, and the rolling portion can roll in the fixed portion in any direction.

[0020] In some embodiments, a contact portion is provided on a surface of the carrier facing the substrate, and two contact portions are provided, one of which contacts the first guide mechanism, and the other of which contacts the second guide mechanism.

[0021] In some embodiments, the fourth guide portion includes a plurality of rollers, and outer surfaces of the rollers are in contact with sides of the support member to assist in guiding the support member.

[0022] The conveyor line according to the second aspect of the utility model comprises the steering structure described in any one of the above items.

[0023] The conveyor line according to the second aspect of the utility model has the following beneficial effects: it can reduce the friction force to which the bearing member is subjected during the turning process. Specifically, in this embodiment, since the first guide mechanism and the second guide mechanism are provided, the bearing member can be guided on both sides of the bearing member respectively. A plurality of rolling members are also provided in the first guide mechanism and the second guide mechanism, and the rolling members can contact with the bottom of the bearing member. In the process of conveying the bearing member, since the rolling part (described later) of the rolling member can roll in all directions, there is rolling friction between the bottom of the bearing member and the rolling member. Compared with the wheel structure and the wheelless structure in the related art, the bearing member can be subjected to less friction force, thereby avoiding the situation in the related art that the bearing member is too severely worn, loses powder due to friction, and cannot carry heavy objects, while increasing the service life of the bearing member and the conveyor line as a whole, it can also improve the conveying accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a top view of the steering structure of the utility model.

[0025] Figure 2 It is a three-dimensional diagram of the steering structure.

[0026] Figure 3 It is a side view of the steering structure.

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 It is a three-dimensional diagram of the bearing member.

[0029] Figure 6 It is a bottom view of the bearing member.

[0030] Reference numerals:

[0031] Carrier 100; magnetic grid 101; magnetic plate 102; contact portion 110; first side 101; second side 102; support member 200; substrate 300; second surface 301; first guide mechanism 400; first guide portion 410; first surface 411; second guide portion 420; second guide mechanism 500; third guide portion 510; third surface 511; fourth guide portion 520; roller 521; rolling member 600; fixing portion 610; rolling portion 620. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] Logistics conveyor lines are widely used in many fields such as express sorting, warehousing and transportation, and manufacturing. Traditional logistics conveyor lines mainly rely on belt transmission, and their working principle is to use friction to transport workpieces. However, this method has the problem of being unable to stop suddenly, which limits the conveying speed and has a direct impact on the overall efficiency. In order to overcome these limitations, magnetic levitation technology has been introduced in the relevant technical field to realize the transportation of workpieces. Magnetic levitation technology has many advantages such as fast conveying speed, low maintenance cost, and high flexibility, so it has been favored by more and more customers.

[0037] The magnetic drive logistics line is divided into a magnetic drive stator and a magnetic drive. The stator is fixed, and the mover can drive the mover to move through the magnetic field force of the stator on the magnetic plate on the mover. In the related art, the branching mode of the mover on the existing magnetic drive logistics line is divided into the mover with wheels and the mover without wheels. The setting of the mover with wheels will result in a situation where it cannot be mixed with the ordinary logistics line, and because the cost of the mover with wheels is high, the cost will increase for occasions where multiple movers are required. In addition, when the bearing wheel on the mover passes through a curve, due to a centripetal force, the bearing wheel is subjected to an axial force. If it is a rubber-coated wheel, the rubber coating is easy to fall off, resulting in a large loss of life, and there is a possibility of friction and powder loss. The structure setting of the mover without wheels generally uses stainless steel or Teflon for the bottom mover guide. When moving, there is sliding friction between the mover and the guide bracket. However, the design using this material is not wear-resistant, and generally can only carry some lighter products. The total weight of the mover plus the product cannot exceed 500g, otherwise the Teflon material will be worn too heavily and cause powder loss.

[0038] Reference Figures 1 to 6 , mainly refer to Figure 1 , Figure 2 According to the first aspect of the present invention, the steering structure is used for steering and conveying a carrier 100, and includes a support 200, a substrate 300 disposed on the support 200, a first guide mechanism 400 and a second guide mechanism 500 respectively disposed on both sides of the substrate 300, and a rolling member 600 disposed on the first guide mechanism 400 and the second guide mechanism 500. The first guide mechanism 400 is disposed on the support 200 and located on one side of the substrate 300, and guides the carrier 100. The second guide mechanism 500 is disposed on the support 200 and located on the other side of the substrate 300, and guides the carrier 100. The rolling member 600 is disposed on the first guide mechanism 400 and the second guide mechanism 500, and the rolling member 600 is in contact with the carrier 100. When the carrier 100 moves in the steering structure, rolling friction occurs between the carrier 100 and the rolling member 600.

[0039] The steering structure according to the first aspect of the present invention has the following beneficial effects: it can reduce the friction force on the carrier 100 during the turning process.

[0040] Specifically, in this embodiment, since the first guide mechanism 400 and the second guide mechanism 500 are provided, the carrier 100 can be guided on both sides of the carrier 100. A plurality of rolling members 600 are also provided in the first guide mechanism 400 and the second guide mechanism 500, and the rolling members 600 can contact the bottom of the carrier 100. In the process of conveying the carrier 100, since the rolling portion 620 (described later) of the rolling member 600 can roll in all directions, there is rolling friction between the bottom of the carrier 100 and the rolling member 600. Compared with the wheel structure and the wheelless structure in the related art, the carrier 100 can be subjected to a smaller friction force, thereby avoiding the situation in the related art that the carrier 100 is too seriously worn, loses powder due to friction, and cannot carry heavy objects, while increasing the service life of the carrier 100 and the overall conveying line, it can also improve the conveying accuracy and efficiency.

[0041] In addition, since the mover (carrier 100) adopts a wheelless structural design in this embodiment, it can be applied to both ordinary conveyor lines and magnetic drive conveyor lines. When the production line needs to have two conveyor lines at the same time, there is no need to replace different carriers 100, which improves the compatibility of the carrier 100. At the same time, compared with the structural design of the mover with wheels, the mover (carrier 100) of the utility model has low cost and can save resources.

[0042] In some embodiments, the first guide mechanism 400 includes a first guide portion 410 and a second guide portion 420, wherein the first guide portion 410 contacts the support member 200, and the second guide portion 420 extends along a side of the first guide portion 410 away from the substrate 300, and the second guide portion 420 is perpendicular to the first guide portion 410. Specifically, when the carrier 100 passes through the steering structure to turn, the first guide portion 410 of the first guide mechanism 400 guides the bottom of the carrier 100, and the second guide portion 420 of the first guide mechanism 400 guides the side of the carrier 100, so that the carrier 100 can move accurately along a predetermined route, making it turn smoothly while also preventing the carrier 100 from flying out of the steering structure.

[0043] In addition, for the material of the first guide mechanism 400, POM (polyoxymethylene) material can be selected, which has a smooth and shiny surface, is hard and dense, and has high wear resistance. When the support member 100 moves in the steering structure, the support member 100 in contact with the inner wall of the first guide mechanism 400 is subject to less friction, which can reduce the risk of wear of the support member 100 and increase the service life of the support member 100 and the steering structure as a whole. Compared with the traditional wheeled impeller structure design, it can further reduce friction and is not prone to powder loss. Compared with the traditional wheelless impeller structure design, it can carry heavier (about 35kg) products and transport them.

[0044] In some embodiments, the second guide mechanism 500 includes a third guide portion 510 and a fourth guide portion 520, wherein the third guide portion 510 is disposed on a side close to the substrate 300, and the fourth guide portion 520 is disposed on a side away from the substrate 300. In addition, the fourth guide portion 520 is higher than the third guide portion 510 in a direction perpendicular to the top surface of the substrate 300. Specifically, when the carrier 100 passes through the steering structure to turn, the third guide portion 510 of the second guide mechanism 500 guides the bottom of the carrier 100, and the fourth guide portion 520 of the second guide mechanism 500 guides the side of the carrier 100, so that the carrier 100 can move accurately along a predetermined route, making it turn smoothly while also preventing the carrier 100 from flying out of the steering structure.

[0045] Further, the fourth guide portion 520 is provided with a plurality of rollers 521, and the outer surfaces of the rollers 521 are in contact with the side of the carrier 100 to assist in guiding the carrier 100. The outer surfaces of the rollers 521 are in contact with the side of the carrier 100 to assist in guiding the carrier 100. Since the carrier 100 generates a centripetal force during a turn, the friction between the carrier 100 and the fourth guide portion 520 is greater than the friction between the carrier 100 and the inner side wall of the first guide portion 410. Therefore, the structural arrangement of the plurality of rollers 521 is adopted to convert the sliding friction into rolling friction, which can further reduce the friction between the carrier 100 and the fourth guide portion 520.

[0046] Reference Figure 3 , Figure 4In some embodiments, the first guide portion 410 and the third guide portion 510 are respectively provided with a plurality of rolling elements 600, and the plurality of rolling elements 600 are arranged at intervals. The intervals between the rolling elements 600 of the third guide portion 510 are greater than the intervals between the rolling elements 600 of the fourth guide portion 520. Since the bearing member 100 generates a centripetal force at a turning position, the rolling elements 600 are arranged more densely (the distance between the rolling elements 600 is smaller) at a position close to the inner side of the turning position (i.e., the third guide portion 510), so that the turning of the bearing member 100 can be smoother and the friction force can be further reduced.

[0047] In some embodiments, the first guide portion 410 has a first surface 411, the substrate 300 has a second surface 301, the third guide portion 510 has a third surface 511, and the heights of the first surface 411 and the third surface 511 in a direction perpendicular to the substrate 300 are lower than the height of the second surface 301. Specifically, since the height of the first guide portion 410 in a direction perpendicular to the substrate 300 is lower than the height of the substrate 300, and the second guide portion 420 is arranged to extend upward perpendicular to the first guide portion 410, a groove is defined between the first guide portion 410, the second guide portion 420 and the substrate 300, thereby providing sufficient space for the arrangement of the rolling element 600 on the first surface 411 of the first guide portion 410. Similarly, since the height of the third guide portion 510 in a direction perpendicular to the substrate 300 is lower than the height of the substrate 300, and the fourth guide portion 520 is arranged to be higher than the third guide portion 510, a groove is jointly defined between the third guide portion 510, the fourth guide portion 520 and the substrate 300, thereby providing sufficient space for the setting of the rolling element 600 on the third surface 511 of the third guide portion 510.

[0048] In some embodiments, the rolling element 600 is mounted on the first surface 411 and the third surface 511, and the height of the top surface of the rolling element 600 in the direction perpendicular to the substrate 300 is higher than the height of the top surface of the substrate 300. When the bearing 100 contacts the rolling portion 620 (i.e., the ball portion of the universal ball bearing described later) of the rolling element 600 and the steering structure makes a turning motion, in order to make the bottom of the bearing 100 only contact the rolling portion 620 and not contact the substrate 300, the height of the top surface of the rolling element 600 in the direction perpendicular to the substrate 300 is higher than the height of the top surface of the substrate 300. Therefore, the bearing 100 will only contact the rolling portion 620 of the rolling element 600 during the motion process, further reducing the friction of the bearing 100.

[0049] It should be noted that, for the magnetic drive conveyor line, the substrate 300 can be set as a magnetic drive stator, and the carrier 100 (mover) moves forward under the driving force of the magnetic field of the magnetic drive stator. After entering the curve, the second guide part 420 guides the outer side of the carrier 100 to make the carrier 100 turn. The rolling element 600 (bull's eye bearing) supports the bottom of the mover, and the inner guide roller 521 supports the inner side of the carrier 100 to make it turn. In this way, the friction resistance of the movement of the carrier 100 can be reduced to the greatest extent.

[0050] Furthermore, the first guide mechanism 400 and the second guide mechanism 500 are both configured as arc-shaped structures to better guide the carrier 100 during a turning process.

[0051] In some embodiments, the rolling member 600 includes a fixed portion 610 and a rolling portion 620, wherein the fixed portion 610 is fixedly mounted on the guide portion, and the rolling portion 620 can roll in the fixed portion 610 in any direction. The rolling member 600 is a universal ball bearing or a ball bearing embedded in the guide portion. In this embodiment, the rolling member 600 is preferably a universal ball bearing (bull's eye bearing). When the bearing member 100 performs a steering movement in the steering structure, the contact portion 110 (described later) of the bearing member 100 contacts the rolling portion 620 (bull's eye) of the universal ball bearing, and there is rolling friction between the rolling portion 620 and the bearing member 100, and there is no sliding friction. In the related art, whether there is a wheel stator or a wheel stator, there will be sliding friction. In contrast, since the bull's eye bearing is universal, no matter the bearing member 100 is subjected to resistance in the direction of movement or due to the centripetal force when turning, the bearing member 100 can move smoothly. The arrangement of this embodiment can reduce the friction force to a great extent, protect the carrier 100, avoid the carrier 100 from losing powder, and increase the service life.

[0052] In addition, refer to Figure 5 , Figure 6 In this embodiment, the carrier 100 includes a magnetic grid 101, a magnetic plate 102 and a contact portion 110, and a magnetic drive motor, a feedback scale, and a driver (not shown) are arranged at the substrate 300. The contact portion 110 contacts the rolling element 600, and there is rolling friction between the contact portion 110 and the rolling element 600. Among them, the magnetic grid 101, the magnetic plate 102 cooperate with the magnetic drive motor, the feedback scale, and the driver to drive the carrier 100 to move.

[0053] In some embodiments, a contact portion 110 is provided on one side of the carrier 100 facing the substrate 300, and two contact portions 110 are provided, one of which contacts the first guide mechanism 400, and the other contacts the second guide mechanism 500. In addition, the carrier 100 includes a first side surface 101 and a second side surface 102. During the movement of the carrier 100, only the contact portion 110 at the bottom of the carrier 100 contacts the rolling member 600, the first side surface 101 of the carrier 100 contacts the second guide portion 420 of the first guide mechanism 400, and the second side surface 102 of the carrier 100 contacts the fourth guide portion 520 of the second guide mechanism 500. Except for the second guide portion 420, the other parts in contact with the carrier 100 are rolling friction, which can minimize the friction force on the carrier 100 and improve the service life.

[0054] In some embodiments, the fourth guide portion 520 includes a plurality of rollers 521, and the outer surface of the roller 521 contacts the side of the carrier 100 to assist in guiding the carrier 100. The outer surface of the roller 521 contacts the side of the carrier 100 to assist in guiding the carrier 100. Since the carrier 100 generates a centripetal force during a turn, the friction between the carrier 100 and the fourth guide portion 520 is greater than the friction between the carrier 100 and the inner side wall of the first guide portion 410. Therefore, the structural arrangement of the plurality of rollers 521 is adopted to convert the sliding friction into rolling friction, which can further reduce the friction between the carrier 100 and the fourth guide portion 520.

[0055] The conveyor line according to the second aspect of the utility model comprises any one of the above-mentioned steering structures.

[0056] The conveyor line according to the second aspect of the utility model has the following beneficial effects: it can reduce the friction force on the carrier 100 during the turning process. Specifically, in this embodiment, due to the provision of the first guide mechanism 400 and the second guide mechanism 500, the carrier 100 can be guided on both sides of the carrier 100. The first guide mechanism 400 and the second guide mechanism 500 are also provided with a plurality of rolling members 600, and the rolling members 600 can contact the bottom of the carrier 100. In the process of conveying the carrier 100, since the rolling portion 620 (described later) of the rolling member 600 can roll in all directions, there is rolling friction between the bottom of the carrier 100 and the rolling member 600. Compared with the wheel structure and the wheelless structure in the related art, the bearing member 100 can be subjected to a smaller friction force, thereby avoiding the situation that the bearing member 100 in the related art is too seriously worn, rubbed off powder, and cannot carry heavy objects, etc., and the service life of the bearing member 100 and the conveyor line as a whole is improved, and the conveying accuracy and efficiency can also be improved.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A steering structure, used for steering and conveying a carrier, characterized in that: include: Supports; A substrate, the substrate being disposed on the support member; A first guiding mechanism, disposed on the supporting member and located on one side of the substrate, for guiding the bearing member; A second guiding mechanism, disposed on the supporting member and located on the other side of the substrate, for guiding the carrier; A rolling member, wherein the rolling member is respectively arranged on the first guide mechanism and the second guide mechanism, and the rolling member is in contact with the supporting member. When the supporting member moves in the steering structure, rolling friction occurs between the supporting member and the rolling member.

2. The steering structure according to claim 1, characterized in that: The first guide mechanism includes a first guide portion and a second guide portion, the first guide portion is in contact with the support member, the second guide portion extends along a side of the first guide portion away from the substrate, and the second guide portion is perpendicular to the first guide portion.

3. The steering structure according to claim 2, characterized in that: The second guide mechanism includes a third guide portion and a fourth guide portion, wherein the third guide portion is arranged at a side close to the substrate, and the fourth guide portion is arranged at a side away from the substrate; Furthermore, the fourth guide portion is higher than the third guide portion along a direction perpendicular to the top surface of the substrate.

4. The steering structure according to claim 3, characterized in that: The first guide portion and the third guide portion are respectively provided with a plurality of the rolling elements, and the plurality of the rolling elements are arranged at intervals; The interval between the rolling elements of the third guide portion is greater than the interval between the rolling elements of the fourth guide portion.

5. The steering structure according to claim 3, characterized in that: The first guide portion has a first surface, the substrate has a second surface, and the third guide portion has a third surface. The heights of the first surface and the third surface along a direction perpendicular to the substrate are lower than the height of the second surface.

6. The steering structure according to claim 5, characterized in that: The rolling element is mounted on the first surface and the third surface, and a height of a top surface of the rolling element in a direction perpendicular to the substrate is higher than a height of a top surface of the substrate.

7. The steering structure according to any one of claims 1 to 6, characterized in that: The rolling element includes a fixed portion and a rolling portion, and the rolling portion can roll in the fixed portion in any direction.

8. The steering structure according to claim 1, characterized in that: A contact portion is disposed on a surface of the carrier facing the substrate, and two contact portions are disposed, one of which contacts the first guide mechanism, and the other of which contacts the second guide mechanism.

9. The steering structure according to claim 3, characterized in that: The fourth guide portion includes a plurality of rollers, and outer surfaces of the rollers are in contact with the side edges of the bearing member to assist in guiding the bearing member.

10. Conveyor line, characterized in that, The steering structure comprises the steering structure as described in any one of claims 1 to 9.

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