Conveying device for car wash system

Abstract

The present invention discloses a conveying device for a car washing system and a vehicle conveying method. The conveying device for a car washing system comprises: a first line body (100) for carrying a vehicle that has come in and stopped, and the first line body (100) can only be driven along the direction of the vehicle's coming in; a second line body (101) docked with the first line body (100) to transfer the vehicle that has stopped at the first line body (100), and the second line body (101) is driven along the direction of the vehicle's coming in; a third line body (102) docked with the second line body (101) and carrying the vehicle that is driven and transferred by the second line body (101), and the third line body (102) can only be driven along the direction of the vehicle's coming in. The conveying device for a car washing system according to the present invention can reduce the difficulty of operation for the vehicle driver.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic car washing, in particular to a conveying device for a car washing system. Background Art

[0002] In the past, when people needed a car wash, they typically drove it to a dedicated car wash. Washing a car at a car wash is not only costly but also time-consuming. To address this, automatic car wash systems have emerged on the market. Because they are easy to operate and highly efficient, automatic car wash systems are very convenient for drivers to use, for example, while commuting.

[0003] Automatic car wash systems require the driver to activate the system automatically upon prompting. For example, in a tunnel car wash system, the driver typically drives the car onto a conveyor, where it is transported while the car is washed by wash components (such as brushes).

[0004] However, existing conveying devices require the driver to operate the vehicle in a certain manner (e.g., requiring the vehicle to shift into neutral or apply the handbrake). Due to different driving habits, some drivers may not drive into the conveying device in the predetermined manner, which may cause the conveying device of the automatic car wash system to fail to start, and may even cause damage to the conveying device or the vehicle. Summary of the Invention

[0005] The present invention aims to at least partially address one of the problems with the prior art. To this end, the present invention provides a conveying device for a car wash system that reduces the operational complexity for the vehicle driver. Furthermore, the present invention also provides a vehicle conveying method based on the conveying device.

[0006] According to the first aspect of the present invention, the conveying device for a car washing system is used to convey vehicles, including: a first line body, which is arranged at the rear end of the conveying device for the car washing system, and is used to carry the vehicle that has traveled in and stopped, and the first line body can only be driven along the incoming direction of the vehicle; a second line body, which is arranged in front of the first line body along the incoming direction of the vehicle, and docked with the first line body to transfer the vehicle stopped at the first line body, and the second line body is driven along the incoming direction of the vehicle; a third line body, which is arranged in front of the second line body along the incoming direction of the vehicle, and docked with the second line body to carry the vehicle transferred by the second line body, and the third line body can only be driven along the incoming direction of the vehicle.

[0007] The conveying device for a car washing system according to the first aspect of the present invention has the following beneficial effects: it can reduce the difficulty of operation for the vehicle driver.

[0008] In some embodiments, the first line body and the third line body respectively have: a first conveying chain supporting the vehicle; a first supporting assembly supporting one of the front end and the rear end of the first conveying chain; a second supporting assembly supporting the other of the front end and the rear end of the first conveying chain; at least one of the first conveying chain, the first supporting assembly and the second supporting assembly is configured to be driven only along the incoming direction of the vehicle.

[0009] In some embodiments, the first support assembly includes: a first transmission wheel, which engages with the first conveyor chain; a first support shaft, which supports the first transmission wheel; two first bearing seats, which respectively support the two axial ends of the first support shaft; wherein, among the two first bearing seats, at least one of the bearings is a one-way bearing that only rotates along the incoming direction of the vehicle; and / or, the first support shaft or the first transmission wheel is restricted to rotate only along the incoming direction of the vehicle by a first ratchet and pawl mechanism.

[0010] In some embodiments, the second support assembly includes: a second transmission wheel, which engages with the first conveyor chain; a second support shaft, which supports the second transmission wheel; and a second bearing seat, which supports the second support shaft; wherein the bearing of the second bearing seat is a one-way bearing that rotates only in the incoming direction of the vehicle; and / or, the second support shaft or the second transmission wheel is restricted to rotate only in the incoming direction of the vehicle by a second ratchet and pawl mechanism.

[0011] In some embodiments, the first conveying chain includes: a first chain body and a plurality of first bearing plates mounted to the first chain body, the first bearing plates carrying the vehicle, and a support wheel is provided on the inner side of each of the first bearing plates; the first conveying chain includes an upper conveying chain for supporting the vehicle, and a support seat is provided at the lower part of the upper conveying chain, and the support wheels move along the support seat.

[0012] In some embodiments, a non-return device is provided on the support seat, and at least a portion of the support wheels are restricted by the non-return device to move only along the incoming direction of the vehicle, so that the first conveying chain can only be driven along the incoming direction of the vehicle.

[0013] In some embodiments, a first limiting block for limiting the wheels of the vehicle is provided on the outer side of at least a portion of the plurality of first supporting plates.

[0014] In some embodiments, the first line body and the third line body respectively have: a plurality of support rollers arranged along the incoming direction of the vehicle to support the vehicle; a plurality of third support assemblies, the third support assemblies respectively supporting the support rollers, and the third support assemblies having one-way bearings that support the support rollers and rotate only along the incoming direction of the vehicle.

[0015] In some embodiments, the second line body includes: a second conveyor chain, supporting the vehicle; a fourth support assembly, supporting one of the front end and the rear end of the second conveyor chain, the fourth support assembly having a transmission shaft for supporting the second conveyor chain; a fifth support assembly, supporting the other of the front end and the rear end of the second conveyor chain; and a second drive motor, connected to the transmission shaft.

[0016] In some embodiments, the second conveying chain includes: a second chain body; a plurality of second supporting plates respectively mounted to the second chain body; and a plurality of second limiting blocks evenly and spacedly mounted to the outsides of different second supporting plates along the length direction of the second chain body.

[0017] In some embodiments, a first transfer line body is provided at the docking position of the first line body and the second line body; a second transfer line body is provided at the docking position of the second line body and the third line body; the first transfer line body and the second transfer line body respectively include a transfer roller that can only be driven along the incoming direction of the vehicle.

[0018] The vehicle conveying method according to the second aspect of the present invention is a vehicle conveying method based on a conveying device for a car washing system, comprising the following steps: after the vehicle stops at a first line body, the car washing system issues a work instruction, wherein the first line body can only be driven along the incoming direction of the vehicle; based on the work instruction, the first line body and the second line body operate to transfer the vehicle from the first line body to the second line body, wherein the second line body is arranged in front of the first line body along the incoming direction of the vehicle and docked with the first line body; the second line body continues to operate to transfer at least the front wheel of the vehicle in the incoming direction to a third line body, wherein the third line body is arranged in front of the second line body along the incoming direction of the vehicle and docked with the second line body, and the third line body can only be driven along the incoming direction of the vehicle; after at least the front wheel of the vehicle in the incoming direction is transferred to the third line body, the car washing system issues an instruction to start the vehicle.

[0019] The vehicle transportation method according to the second aspect of the present invention has the following beneficial effects: it can reduce the operating difficulty of the vehicle driver.

[0020] The vehicle conveying method according to the third aspect of the present invention is a vehicle conveying method based on a conveying device for a car washing system, comprising the following steps: after the vehicle stops at a first line body and at least the front wheel of the vehicle in the incoming direction stops at a second line body, the car washing system issues a work instruction, wherein the first line body can only be driven along the incoming direction of the vehicle, and the second line body is arranged in front of the first line body along the incoming direction of the vehicle and docked with the first line body; based on the work instruction, the second line body operates to transfer the vehicle from the first line body to the second line body; the second line body continues to operate to transfer at least the front wheel of the vehicle in the incoming direction to a third line body, wherein the third line body is arranged in front of the second line body along the incoming direction of the vehicle and docked with the second line body, and the third line body can only be driven along the incoming direction of the vehicle; after at least the front wheel of the vehicle in the incoming direction is transferred to the third line body, the car washing system issues an instruction to start the vehicle.

[0021] The vehicle transportation method according to the third aspect of the present invention has the following beneficial effects: it can reduce the operating difficulty of the vehicle driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic plan view of a conveying device for a car wash system according to a first embodiment of the present invention.

[0023] Figure 2 Schematic diagram of an embodiment of a first line body.

[0024] Figure 3 yes Figure 2 Cross-sectional view at AA in.

[0025] Figure 4 yes Figure 2 A schematic diagram of the main part of the front end portion of the first line body.

[0026] Figure 5 yes Figure 2 A schematic diagram of the main part of the rear end portion of the first line body.

[0027] Figure 6 It is a schematic diagram of the main parts of another embodiment of a conveying device for a car washing system.

[0028] Figure 7 It is a schematic diagram of the main parts of another embodiment of a conveying device for a car washing system.

[0029] Figure 8 It is a schematic diagram of the main parts of another embodiment of a conveying device for a car washing system. DETAILED DESCRIPTION

[0030] Examples of the present embodiment are described in detail below. 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 embodiment and are not to be construed as limiting the present embodiment.

[0031] In the description of this embodiment, 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. They are only for the convenience of describing this embodiment 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. Therefore, they cannot be understood as limitations on this embodiment.

[0032] In the description of this embodiment, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0033] In the description of this embodiment, unless otherwise clearly defined, terms such as setting, installing, and connecting 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 this embodiment based on the specific content of the technical solution.

[0034] Figure 1 1 is a schematic plan view of a conveying device for a car wash system according to a first embodiment. Figure 2 is a schematic diagram of the first line body 100, Figure 3 yes Figure 2 In the cross-sectional view at AA, in addition, Figure 3 In the figure, the first wire body 100 is broken and only the main part of the first wire body 100 is shown. In addition, for the sake of convenience, the hatching is omitted. Figures 1 to 3According to the first embodiment, the conveying device for a car washing system is used to convey vehicles, and includes: a first line body 100, a second line body 101 and a third line body 102. The first line body 100 is arranged at the rear end of the conveying device for a car washing system, and is used to carry the vehicle that has traveled in and stopped. The first line body 100 can only be driven in the direction of the vehicle's approach. The second line body 101 is arranged in front of the first line body 100 in the direction of the vehicle's approach, and docks with the first line body 100 to transfer the vehicle stopped on the first line body 100. The second line body 101 is driven in the direction of the vehicle's approach. The third line body 102 is arranged in front of the second line body 101 in the direction of the vehicle's approach, and docks with the second line body 101 and carries the vehicle driven and transferred by the second line body 101. The third line body 102 can only be driven in the direction of the vehicle's approach.

[0035] The conveyor device for a car wash system according to this embodiment reduces the operational complexity for vehicle drivers. Specifically, since each tether can only be driven in the vehicle's incoming direction, and at least the second tether 101 has driving power, the driver can simply park the vehicle (either by applying the parking brake or shifting the vehicle into neutral) after the vehicle has been driven onto the first tether 100, or after the driver has driven the vehicle onto the first tether 100 and the front wheels in the vehicle's incoming direction have moved onto the second tether 101. After the main body of the vehicle has stopped on the first tether 100, the vehicle can be transferred to the second tether 101 by driving the second tether 101. While the second tether 101 is transferring the vehicle, other washing devices in the car wash system (such as the washer fluid sprayer, scrubber, and dryer (not shown)) can operate simultaneously or at different times to clean the vehicle. Furthermore, after the second tether 101 has transferred the vehicle to the third tether 102 (or partially transferred to the third tether 102), the driver is notified that the vehicle can be started.

[0036] Therefore, during the entire car washing process, the driver only needs to perform the parking operation and the vehicle start and leave operation, which can reduce the operating difficulty of the vehicle driver.

[0037] In the conveying device for a car wash system of this embodiment, since the first and third linear bodies 100 and 102 are each restricted to being driven only in the vehicle's incoming direction, the vehicle can be allowed to travel onto the first linear body 100 or travel off the third linear body 102 under its own power without causing the vehicle to slip on the first and third linear bodies 100 and 102. In addition, since the first and third linear bodies 100 and 102 can each be driven in the vehicle's incoming direction, it is also possible to convey the vehicle from the first linear body 100 to the second linear body 101, or from the second linear body 101 to the third linear body 102, while the vehicle is stopped, primarily by the driving force of the second linear body 101. Furthermore, since the first line body 100 and the third line body 102 are respectively restricted to be driven only in the direction of the vehicle's approach, when the vehicle is in neutral, the wheels of the vehicle can rotate relative to the first line body 100 and the third line body 102. Even if the vehicle's handbrake is pulled (when the vehicle is parked), the wheels of the vehicle themselves can drive the first line body 100 and the third line body 102 to rotate, so that the wheels will not wear out relative to the first line body 100 or the third line body 102.

[0038] Therefore, the conveying device for a car washing system of this embodiment can not only improve the degree of automation of the car washing system, but also reduce the difficulty of operation for the vehicle driver.

[0039] The vehicle of the present embodiment is not particularly limited, and examples thereof include sedans, SUVs, and buses. Examples of sedan sizes and wheelbases include A-class, B-class, C-class, and D-class vehicles.

[0040] In addition, the vehicle approach direction described in this embodiment refers to the direction from which the vehicle enters the car wash system. This approach direction and the direction from which the vehicle exits the car wash system may be the same direction. In this embodiment, the vehicle approach direction (or exit direction) is represented by the front-back direction. The direction along the direction of travel is the front, and the direction opposite to the direction of travel is the rear.

[0041] The method by which a vehicle enters a car wash system is not particularly limited. For example, a vehicle may enter the car wash system in a normal driving manner (i.e., the front of the vehicle enters the car wash system first) or in a reverse manner (i.e., the rear of the vehicle enters the car wash system first). In this embodiment, the wheel (which may be the front wheel or the rear wheel) that first enters the car wash system is referred to as the front wheel in the incoming direction. The following embodiments illustrate the example of a vehicle entering the car wash system in a normal driving manner.

[0042] Furthermore, the car wash system of this embodiment may be a tunnel-type car wash system. This embodiment primarily describes the conveyor device used in the car wash system. Other devices of the car wash system of this embodiment, such as barriers, sensors for detecting vehicle start / stop, arrival, and departure, other car wash devices (such as a washer fluid sprayer, scrubber, and blower), and alarm devices, can refer to existing tunnel-type car wash systems. Detailed descriptions are omitted here unless necessary.

[0043] The first wire body 100, the second wire body 101 and the third wire body 102 can be set on the welded base 103 or directly on the ground 104. The length direction of the base 103 extends in the front-to-back direction. Taking the base 103 and the first wire body 100 as an example, for example, there can be two bases 103 distributed at intervals in the left-right direction, and the first wire body 100 can include two, which are respectively set on the base 103 in the left and right directions. One of the first wire bodies 100 supports the left front wheel and the left rear wheel of the vehicle, and the other first wire body 100 supports the right front wheel and the right rear wheel of the vehicle. The distance between the two first wire bodies 100 in the left-right direction is not particularly limited, as long as it can be applied to the width of the vehicle to be cleaned. By arranging each wire body separately on the base 103, the construction difficulty of the conveying device can be reduced. In addition, the application scenarios of the car washing system can also be expanded.

[0044] The first linear body 100 (and the third linear body 102 ) will be described below.

[0045] Figure 4 1 is a schematic diagram of the main part of the front end portion of the first wire body 100. Figure 5 yes Figure 2 The schematic diagram of the main part of the rear end portion of the first line body 100 is shown in FIG. Figure 4 、 Figure 5 , and continue to refer to Figure 3 In some embodiments, the first and third line bodies 100 and 102 each include a first conveyor chain 105, a first support assembly 106, and a second support assembly 107. The first conveyor chain 105 is used to support the vehicle. The first support assembly 106 supports one of the front and rear ends of the first conveyor chain 105. The second support assembly 107 supports the other of the front and rear ends of the first conveyor chain 105. At least one of the first conveyor chain 105, the first support assembly 106, and the second support assembly 107 is configured to be driven only in the vehicle's incoming direction.

[0046] The structures of the first wire body 100 and the third wire body 102 are substantially the same. For the sake of convenience, the first wire body 100 is mainly used as an example for description, and the third wire body 102 is mentioned only when necessary.

[0047] The first conveyor chain 105 may be a plate-type conveyor chain. As a plate-type conveyor chain, the first conveyor chain 105 may include a first chain body 108 and a plurality of first load-bearing plates 109 mounted to the first chain body 108. Specifically, for example, the first chain body 108 may include two first load-bearing plates 109 spaced apart in the left-right direction. The first chain body 108 may be a heavy-duty conveyor roller chain with mounting attachments 110, for example. The first load-bearing plates 109 are used to support vehicles, with the left and right ends of the first load-bearing plates 109 being mounted to the mounting attachments 110 of the first chain body 108, respectively. This allows for the formation of a plate-type conveyor chain having a predetermined load-bearing width in the left-right direction.

[0048] In addition, the first conveyor chain 105 may also be a plate-type conveyor chain, such as a commercially available floor chain. By using a plate-type conveyor chain to support vehicles, the area of ​​each line body used to support vehicles can be widened, making it easier for vehicle drivers to enter the conveyor device of the car wash system, and at the same time, improving the versatility of the conveyor device.

[0049] Reference Figure 3 When viewed from the left and right directions, the first linear body 100 is generally in the shape of an elongated circle, that is, the first conveyor chain 105 is generally in the shape of an elongated circle. For the sake of convenience, the portion of the first conveyor chain 105 that runs to the upper part of the first linear body 100 and is used to support the vehicle is referred to as the "upper conveyor chain 105u", and the portion of the first conveyor chain 105 that runs to the lower part of the first linear body 100 is referred to as the "lower conveyor chain 105d". The side of the upper conveyor chain 105u that supports the wheels is referred to as the "outer side", and the side opposite to the "outer side" and facing the lower conveyor chain 105d is referred to as the "inner side". Similarly, the downward side of the lower conveyor chain 105d is referred to as the "outer side", and the side opposite to the "outer side" is referred to as the "inner side".

[0050] In some embodiments, to increase the load-bearing capacity of the first linear body 100, support wheels 111 are provided on the inner side of each first load-bearing plate 109. A support base 112 is provided below the upper conveyor chain 105u of the first conveyor chain 105. The support wheels 111 are supported by and move along the support base 112. The support base 112 is disposed on the base 103 and is positioned vertically between the upper conveyor chain 105u and the lower conveyor chain 105d. The support base 112 can be a long, strip-shaped component formed from steel profiles such as channel steel, I-beams, square beams, or flat beams, extending along the length of the base 103.

[0051] Thus, by providing support wheels 111 supported on support seats 112 on the lower side of each first supporting plate 109, the load-bearing capacity of the first linear body 100 can be greatly improved, and the vertical collapse of the first linear body 100 can be suppressed. In addition, by allowing the support wheels 111 to roll along the support seats 112, the smoothness of the operation of the first linear body 100 can be improved, thereby improving the comfort of the driver driving the vehicle to the first linear body 100.

[0052] It should be noted that, although the above description is made with a plate-type conveyor chain as an example, it is not limited thereto. For example, the first conveyor chain 105 may also be a multi-row roller chain, for example.

[0053] In addition, although the above description is made by taking the conveyor chain as an example, it is not limited to this. In the case of sufficient strength, each line body can also use a belt line or the like.

[0054] Reference Figure 4 , and auxiliary reference Figure 3 , the first support assembly 106 can be set at the front end of the first conveyor chain 105. The first support assembly 106 includes: a first transmission wheel 113, a first support shaft 114 and two first bearing seats 115. Among them, the first transmission wheel 113 includes two in the left and right directions, and the first transmission wheels 113 respectively engage with the first conveyor chains 105 in the left and right directions. The structure of the first transmission wheel 113 is determined according to the model of the first chain body 108. For example, when the first chain body 108 is a roller chain, the first transmission wheel 113 is a sprocket that can engage with the roller chain. The first support shaft 114 extends in the left and right directions and supports the two first transmission wheels 113 in the left and right directions. The two first bearing seats 115 are respectively arranged on the base 103 at intervals in the left and right directions, and the first bearing seats 115 support the axial ends of the first support shaft 114.

[0055] If the first chain body 100 requires active driving power, the first chain body 100 may further include a first drive motor 116 mounted on the base 103 and connected to the first support shaft 114 of the first support assembly 106. Thus, the first drive motor 116 can drive the first chain body 108. By providing the first drive motor 116 for driving the first chain body 108, the vehicle can be smoothly transferred from the first chain body 100 to the second chain body 101. Since at least a portion of the vehicle (e.g., the front wheels) only needs to stop on the first chain body 100 to transfer the vehicle to the second chain body 101, the difficulty of operating the vehicle for the driver can be further reduced.

[0056] Furthermore, while the above description describes an example in which the first tether 100 includes the first drive motor 116, this is not limiting. For example, if the driver is required to steer at least the front wheels of the vehicle toward the second tether 101, since the second tether 101 has its own independent power (described later), the first tether 100 may not have any drive power, and the entire vehicle, partially located on the first tether 100, may be directly transferred to the second tether 101 via the second tether 101.

[0057] In addition, it should be noted that, when the first wire body 100 (or the third wire body 102) does not have an active driving power, when it is said that the first wire body 100 (or the third wire body 102) is driven, it should be understood that the first wire body 100 (or the third wire body 102) is driven by the friction force from the wheels of the vehicle, so that there is no sliding friction between the wheels of the vehicle and the first wire body 100 (or the third wire body 102) (for example, when the first wire body 100 (or the third wire body 102) has a plate conveyor chain), or there is rolling friction between the wheels of the vehicle and the first wire body 100 (or the third wire body 102) (for example, when the first wire body 100 (or the third wire body 102) has a support roller 125).

[0058] Reference Figure 5 , and auxiliary reference Figure 3 The second support assembly 107 can be installed at the rear end of the first conveyor chain 105. To independently adjust the tension of the two first chain bodies 108 on the left and right sides, the second support assembly 107 can include two, one on each side of the base 103 in the left and right directions. The first support assembly 106 includes a second transmission wheel 117, a second support shaft 118, and a second bearing block 119. The second transmission wheel 117 engages with the first conveyor chain 105 (i.e., the first chain body 108). The structure of the second transmission wheel 117 can be similar to that of the first transmission wheel 113. The second support shaft 118 extends horizontally and supports the second transmission wheel 117. The second bearing block 119 supports the second support shaft 118. Furthermore, the second support assembly 107 is provided with a tensioning portion 120 for adjusting the tension of the first chain body 108. For example, the tensioning portion 120 can be adjusted by adjusting the position of the second bearing block 119 in the left and right directions. The tensioning portion 120 can be a tensioning device known in the chain transmission mechanism.

[0059] As described above, the first line body 100 can be driven only in the vehicle's incoming direction (forward direction). Specifically, at least one of the first conveyor chain 105, the first support assembly 106, and the second support assembly 107 can be driven only in the vehicle's incoming direction.

[0060] Continue to refer to Figure 3 、 Figure 4 In some embodiments, for example, the first conveyor chain 105 can be driven only in the vehicle's incoming direction. Specifically, a check device 121 can be provided on the support base 112. The check device 121 restricts at least a portion of the support wheels 111 disposed on the inner side of the first carrier plate 109 from moving only in the vehicle's incoming direction, thereby enabling the first conveyor chain 105 to be driven only in the vehicle's incoming direction. The check device 121 can, for example, include a swingable check block 122 and a spring member (not shown) that applies an upward force to the check block 122. When the support wheel 111 disposed on the inner side of the first carrier plate 109 of the first conveyor chain 105 rolls forward of the support base 112, the support wheel 111 presses against the check block 122 and passes over it. After the support wheel 111 passes over the check block 122, the check block 122 is driven upward by the spring member. Thus, the support wheel 111 can be restricted from rolling in the rear direction of the support seat 112 , so that the first conveying chain 105 as a whole is restricted from running in the rear direction by the non-return device 121 .

[0061] The number and position of the non-return devices 121 are not particularly limited, as long as they can limit the first conveying chain 105 from running in the direction opposite to the incoming direction. However, preferably, a plurality of non-return devices 121 are evenly distributed along the front-to-back direction of the support base 112. Further preferably, the distance between two adjacent non-return devices 121 along the front-to-back direction is set to be the same as the distance between two adjacent support wheels 111. In addition, in order to save costs, the distance between the non-return devices 121 along the front-to-back direction can also be set to an integer multiple (for example, 2 times or 3 times) of the distance between the two support wheels 111 as needed. In order to cover the vehicle as a whole, the total length of the non-return devices 121 distributed along the front-to-back direction is greater than the distance between the front and rear wheels of the vehicle.

[0062] By providing a non-return device 121 on the support seat 112 to limit the support wheel 111, the risk of the first conveyor chain 105 being broken can be greatly reduced. Specifically, when the vehicle drives into the first line body 100 in the forward direction and is supported by the first supporting plate 109, the wheels of the vehicle simultaneously apply a force in the backward direction to the first supporting plate 109. In particular, when the vehicle is moving at a high speed or suddenly brakes, the wheels of the vehicle will apply a large force in the backward direction to the first supporting plate 109. When the first conveyor chain 105 is used for a long time (especially when it is corroded by a certain corrosive liquid such as soapy water used for car washing), the screws used to connect the first supporting plate 109 and the first chain body 108, or the connecting pins used to connect two adjacent chain links of the first chain body 108 may be reduced in strength due to rust or the like. In this embodiment, because the anti-return device 121 is configured to directly restrict the rearward movement of the first carrier plate 109, the blocking force of the anti-return device 121 can be applied directly to the first carrier plate 109 without being transmitted through the first chain body 108. In other words, the rearward force applied by the vehicle's wheels to the first carrier plate 109 can be prevented from being applied to the connection between the first carrier plate 109 and the first chain body 108, or to the connecting pins between the links of the first chain body 108. This effectively prevents the screws connecting the first carrier plate 109 and the first chain body 108, or the connecting pins connecting two adjacent links of the first chain body 108, in the first conveyor chain 105 from being severed.

[0063] In some embodiments, the first support assembly 106 can also be configured to be driven only in the direction of the vehicle's approach. For example, among the two first bearing seats 115, the bearing of at least one of them is a one-way bearing that rotates only in the direction of the vehicle's approach. From the perspective of balanced force, preferably, one-way bearings are selected for the bearings of the two first bearing seats 115. There is no particular limitation on the type and specifications of the one-way bearings, and commercially available one-way bearings can be selected as needed. By selecting one-way bearings, the first support shaft 114 supported by the two first bearing seats 115 is limited to being driven only in the direction of the vehicle's approach. While the one-way drive of the first wire body 100 can be achieved, the cost of the first wire body 100 can also be reduced.

[0064] Continue to refer to Figure 4In addition, as an example of restricting the first support assembly 106 to be driven only in the vehicle's incoming direction, the first support shaft 114 or the first transmission wheel 113 can also be restricted to rotate only in the vehicle's incoming direction by a first ratchet and pawl mechanism 123. The first ratchet and pawl mechanism 123, for example, includes a first ratchet 123a and a first pawl 123b. The first ratchet 123a can be coaxially mounted on the first support shaft 114 or the first transmission wheel 113. The first pawl 123b can be mounted in any position that can cooperate with the first ratchet 123a, for example, the first pawl 123b can be mounted on the base 103.

[0065] In some embodiments, the second support assembly 107 can also be configured to be driven only in the vehicle's incoming direction. Similarly, for example, the bearing of the second bearing seat 119 can be a one-way bearing that rotates only in the vehicle's incoming direction. Furthermore, the second support shaft 118 or second transmission wheel 117 of the second support assembly 107 is also constrained to rotate only in the vehicle's incoming direction by a second ratchet and pawl mechanism (not shown). The design of the second ratchet and pawl mechanism can be similar to that of the first ratchet and pawl mechanism 123 and will not be described in detail here.

[0066] It should be noted that the examples described above of the first conveyor chain 105, the first support assembly 106, and the second support assembly 107 being driven only in the vehicle's incoming direction can be combined in any manner. For example, the first conveyor chain 105 and the first support assembly 106 can each be driven only in the vehicle's incoming direction. Alternatively, the first support assembly 106 and the second support assembly 107 can also be driven only in the vehicle's incoming direction.

[0067] Continue to refer to Figure 4 , and auxiliary reference Figure 2 In some embodiments, first limiting blocks 124 for limiting the wheels of a vehicle are provided on the outer sides of at least a portion of the multiple first supporting plates 109 of the first conveyor chain 105. When the first limiting blocks 124 are located on the upper conveyor chain 105u of the first conveyor chain 105 as the first conveyor chain 105 operates, the distance between two adjacent first limiting blocks 124 along the front-to-back direction can be, for example, slightly greater than the distance between the centers of the front and rear wheels of the vehicle. Furthermore, when the number of first limiting blocks 124 is increased, the distance between two adjacent first limiting blocks 124 along the front-to-back direction can be, for example, slightly greater than half the distance between the centers of the front and rear wheels of the vehicle.

[0068] This prevents the vehicle from slipping relative to the first tether 100 due to wheel slip or the driver not applying the handbrake, thereby improving the positional accuracy of the vehicle relative to the first tether 100 and reducing the risk of unexpected alarms or sudden stops in the conveying device or even the car wash system due to positional deviation of the vehicle relative to the first tether 100. In particular, while the first tether 100 or the second tether 101 is in operation, vehicle slippage relative to the first tether 100 can be very effectively prevented.

[0069] Although the above description is made by taking the example that the first line body 100 and the third line body 102 include the first conveyor chain 105 , the forms of the first line body 100 and the third line body 102 are not limited thereto.

[0070] Figure 6 This is a schematic diagram of the main part of another embodiment of a conveying device for a car washing system, referring to Figure 6 For example, the first and third filaments 100 and 102 can each include a plurality of support rollers 125 and a plurality of third support assemblies 126. The support rollers 125 are arranged along the vehicle's incoming direction and are used to support the vehicle. The third support assemblies 126 each support the support rollers 125. For example, the third support assemblies 126 are divided into two groups, one on the left and one on the right, and are each mounted on the base 103. The third support assemblies 126 on the left side of the base 103 support the left axial ends of the support rollers 125. The third support assemblies 126 on the right side of the base 103 support the right axial ends of the support rollers 125. Each third support assembly 126 can be a conventional bearing assembly for supporting rollers, which will not be described in detail here. Furthermore, the bearings of the third support assemblies 126 are one-way bearings that rotate only in the vehicle's incoming direction. This allows the support rollers 125 to rotate only in the vehicle's incoming direction.

[0071] In this embodiment, since the first and third tractors 100 and 102 each utilize support rollers 125 that rotate only in the vehicle's incoming direction, the vehicle can be driven onto the first tractor 100 or off the third tractor 102 under its own power without slipping on the first or third tractor 100 or 102. Furthermore, when the vehicle is being transported by the second tractor 101 and in neutral, the vehicle's wheels can rotate relative to the support rollers 125. Even when the vehicle's parking brake is engaged (i.e., when parked), the vehicle's wheels can still drive the support rollers 125 to rotate, preventing wheel wear relative to the first or third tractor 100 or 102. This effectively prevents wheel wear and reduces the operational complexity for the driver.

[0072] The second line body 101 will be described below.

[0073] Figure 7 、 Figure 8 This is a schematic diagram of the main parts of another embodiment of a conveying device for a car washing system, wherein: Figure 7 Indicates the docking position of the second line body 101 and the third line body 102, Figure 8 Indicates the docking position of the first line body 100 and the second line body 101, refer to Figure 7 、 Figure 8 In some embodiments, the second line body 101 includes a second conveyor chain 127, a fourth support assembly 128, a fifth support assembly 129, and a second drive motor 130. The second conveyor chain 127 supports the vehicle. The fourth support assembly 128 supports one of the front and rear ends of the second conveyor chain 127 and includes a drive shaft 131 for supporting the second conveyor chain 127. The fifth support assembly 129 supports the other of the front and rear ends of the second conveyor chain 127. The second drive motor 130 is connected to the drive shaft 131.

[0074] The structure of the second conveyor chain 127 is substantially the same as that of the first conveyor chain 105. For example, the second conveyor chain 127 may also be a plate-type conveyor chain. As a plate-type conveyor chain, the second conveyor chain 127 may also include: a second chain body 132 and a plurality of second supporting plates 133 respectively mounted to the second chain body 132. Furthermore, to similarly increase the load-bearing capacity of the second line body 101, support wheels 111 may also be provided on the inner side of each second supporting plate 133. A support base 112 is also provided at the lower portion of the second conveyor chain 127, and the support wheels 111 are supported by and travel along the support base 112.

[0075] Furthermore, the second conveyor chain 127 may also include a plurality of second limiting blocks 134, which are evenly and spaced apart from each other along the length of the second chain body 132 and are mounted on the outside of different second supporting plates 133. When the second limiting blocks 134 are positioned above the second conveyor chain 127 as the second conveyor chain 127 operates, the distance between two adjacent second limiting blocks 134 in the front-to-back direction is set to be slightly larger than the diameter of the vehicle's wheels. For example, adjacent second limiting blocks 134 may be mounted on the second supporting plate 133 at intervals of three to five second supporting plates 133.

[0076] By providing the second limiting block 134 on the second supporting plate 133, it is possible to prevent the vehicle from slipping relative to the second tether 101 due to wheel slippage or the driver not applying the handbrake during the operation of the second tether 101. This improves the positional accuracy of the vehicle relative to the second tether 101 and reduces the risk of accidental alarms or sudden stops in the conveying device or even the car wash system due to positional deviation of the vehicle relative to the second tether 101.

[0077] The fourth support assembly 128 can be designed with reference to the structure of the first support assembly 106. For example, the fourth support assembly 128 can be provided at the front end of the second conveyor chain 127. In addition, in this embodiment, the bearing of the fourth support assembly 128 can be either a one-way bearing or a two-way bearing.

[0078] Likewise, the fifth support assembly 129 may be designed based on the structure of the second support assembly 107 , which will not be described in detail herein.

[0079] Continue to refer to Figure 8 In some embodiments, a first transfer line 135 is provided at the connection point between the first line 100 and the second line 101. A second transfer line 136 is provided at the connection point between the second line 101 and the third line 102. The structures of the first transfer line 135 and the second transfer line 136 are substantially the same. Here, the first transfer line 135 is primarily used as an example for description, and the second transfer line 136 is only mentioned when necessary.

[0080] For example, the first transfer line 135 and the second transfer line 136 each include transfer rollers 137 distributed along the front-to-back direction. The number of transfer rollers 137 is not particularly limited; for example, one to five can be selected. Furthermore, the transfer rollers 137 can also be supported by one-way bearings so that they can be driven only in the vehicle's incoming direction. Furthermore, if the first limiting block 124 is provided on the outer side of the first supporting plate 109 and / or the second limiting block 134 is provided on the outer side of the second supporting plate 133, a clearance groove 138 can be provided on the transfer rollers 137. This prevents interference between the first limiting block 124 and / or the second limiting block 134 and the transfer rollers 137. The provision of transfer rollers 137 not only reduces the gap between the first transfer line 135 and the first and second lines 100, 101, but also ensures a smooth transition of the vehicle at the junction between the first and second lines 100, 101. Furthermore, since the transfer rollers 137 are driven only in the vehicle's approaching direction, even when the vehicle's parking brake is engaged (i.e., when the vehicle is parked), the vehicle's wheels can still drive the transfer rollers 137 to rotate, thereby preventing the wheels from rubbing against the first transfer line body 135 or the second transfer line body 136. Therefore, wheel rubbing can be effectively prevented.

[0081] Hereinafter, a vehicle conveying method of a vehicle washing system in which the first linear body 100 of the conveying device has active driving power will be described.

[0082] According to the second embodiment, a vehicle conveying method using a conveying device for a car wash system includes the following steps:

[0083] S10: After the vehicle stops at the first line body 100, the car washing system issues a work instruction, wherein the first line body 100 can only be driven along the incoming direction of the vehicle.

[0084] S11: Based on the work instruction, the first line body 100 and the second line body 101 operate to transfer the vehicle from the first line body 100 to the second line body 101, wherein the second line body 101 is arranged in front of the first line body 100 along the incoming direction of the vehicle and docked with the first line body 100.

[0085] S12: The second line body 101 continues to operate so that at least the front wheels of the vehicle in the incoming direction are transferred to the third line body 102, wherein the third line body 102 is arranged in front of the second line body 101 along the incoming direction of the vehicle and docked with the second line body 101, and the third line body 102 can only be driven along the incoming direction of the vehicle.

[0086] S13: After at least the front wheels of the vehicle in the incoming direction are transferred to the third line body 102, the car washing system issues an instruction to start the vehicle.

[0087] The vehicle transport method of this embodiment can reduce the operational difficulty for the vehicle driver. Specifically, after the vehicle driver drives the vehicle onto the first line 100, they can park the vehicle (the driver can apply the handbrake or put the vehicle in neutral). The vehicle is transferred to the second line 101 via the first line 100 and the second line 101. While the second line 101 is transferring the vehicle, other car wash devices in the car wash system (such as the washer fluid spraying device, the scrubbing device, and the drying device) operate simultaneously to clean the vehicle. In addition, after the second line 101 transfers the vehicle to the third line 102 (or partially transfers the vehicle to the third line 102), the driver is notified that the vehicle can be started.

[0088] Furthermore, because the first and third filaments 100 and 102 are each restricted to being driven only in the vehicle's incoming direction, the vehicle's wheels can rotate relative to the first and third filaments 100 and 102 when the vehicle is in neutral. Even when the vehicle's parking brake is engaged (i.e., when parked), the vehicle's wheels can still drive the first and third filaments 100 and 102 to rotate, preventing tire wear relative to the first and third filaments 100 and 102. Thus, the vehicle transport method according to this embodiment only requires the driver to park the vehicle and initiate the vehicle's departure, thus reducing operational complexity for the driver. Prior to step S10, the vehicle's position can be detected using, for example, a photoelectric sensor. After the vehicle reaches a designated position on the first filament 100, the car wash system's control device issues a parking instruction to the driver. The car wash system can prompt the driver to stop the vehicle through voice prompts, screen displays, and other means. Furthermore, while prompting the driver to stop, the car wash system can also remind the driver to park the vehicle and retract the rearview mirrors.

[0089] In step S10 , the working instructions issued by the car washing system include but are not limited to: operating the first drive motor 116 of the first line body 100 , operating the second drive motor 130 of the second line body 101 , and starting other car washing devices.

[0090] In step S11: the first line body 100 and the second line body 101 start to operate based on the work instruction, and the first drive motor 116 and the second drive motor 130 start to operate so that the vehicle is transferred from the first line body 100 to the second line body 101. In this embodiment, during the process of transferring the vehicle from the first line body 100 to the second line body 101, the rotation speed of the first drive motor 116 can be the same as the rotation speed of the second drive motor 130. In this way, the vehicle can be smoothly transported from the first line body 100 to the second line body 101. Furthermore, after the rear wheels of the vehicle leave the first line body 100, the car washing system can issue a command to reduce the rotation speed of the second drive motor 130 of the second line body 101. In this way, the vehicle can be fully washed within the range of the car washing device.

[0091] In step S12, the car wash system continues to operate the second line 101 to transfer the vehicle's front wheels to the third line 102. The second line 101 can remain in operation after receiving the work instruction. This improves car wash efficiency and reduces the frequency of starting and stopping the second drive motor 130.

[0092] In step S13, after the front wheels of the vehicle are transferred to the third line 102, the car wash system issues a command to start the vehicle. To prevent the vehicle start-up from affecting the second conveyor chain 127, the car wash system preferably notifies the driver of the completion of the automatic car wash and the start of the vehicle departure command through voice prompts, screen displays, etc. after the rear wheels of the vehicle leave the second line 101 and the second line 101 stops operating.

[0093] Hereinafter, a vehicle conveying method of a vehicle washing system based on a conveying device in which the first linear body 100 has or does not have an active driving power will be described.

[0094] The vehicle transportation method according to the third embodiment includes the following steps:

[0095] S14: After the vehicle stops at the first line body 100 and at least the front wheel of the vehicle in the incoming direction stops at the second line body 101, the car washing system issues a work instruction, wherein the first line body 100 can only be driven along the incoming direction of the vehicle, and the second line body 101 is arranged in front of the first line body 100 along the incoming direction of the vehicle and docked with the first line body 100.

[0096] S15 : Based on the work instruction, the second line body 101 operates to transfer the vehicle from the first line body 100 to the second line body 101 .

[0097] S16: The second line body 101 continues to operate so that at least the front wheel of the vehicle in the incoming direction is transferred to the third line body 102, wherein the third line body 102 is arranged in front of the second line body 101 along the incoming direction of the vehicle and docked with the second line body 101, and the third line body 102 can only be driven along the incoming direction of the vehicle.

[0098] S17: After at least the front wheels of the vehicle in the incoming direction are transferred to the third line body 102, the car washing system issues an instruction to start the vehicle.

[0099] In other words, the vehicle transport method of the third embodiment is substantially the same as the vehicle transport method of the second embodiment. The difference is that in the third embodiment, the vehicle wheels must stop on the second line 101 before the car wash system issues an operation instruction. Furthermore, if the first line 100 lacks independent drive power, the car wash system does not issue an operation instruction to operate the first line 100 or to equalize the rotational speed of the first line 100 with that of the second line 101.

[0100] Throughout this specification, reference to terms such as "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 that embodiment or example are included in at least one embodiment or example of the present embodiment. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0101] Although examples of the present embodiment have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and intent of the present embodiment, and the scope of the present embodiment is defined by the claims and their equivalents.

Claims

1. A conveying device for a car wash system, used for conveying vehicles, characterized in that: include: A first linear body (100) is provided at the rear end of the conveying device for the vehicle washing system and is used to carry vehicles that have come in and stopped. The first linear body (100) can only be driven in the direction in which the vehicles come in; A second line body (101) is arranged in front of the first line body (100) along the incoming direction of the vehicle, docked with the first line body (100) to transfer the vehicle stopped at the first line body (100), and the second line body (101) is driven along the incoming direction of the vehicle; A third line body (102) is arranged in front of the second line body (101) along the incoming direction of the vehicle, docked with the second line body (101) and carrying the vehicle driven and transferred by the second line body (101), and the third line body (102) can only be driven along the incoming direction of the vehicle; The first linear body (100) has: a first conveying chain (105) supporting the vehicle, wherein the first conveying chain (105) comprises: a first chain body (108) and a plurality of first bearing plates (109) mounted on the first chain body (108); The first bearing plates (109) bear the vehicle, and a support wheel (111) is provided on the inner side of each first bearing plate (109); The first conveying chain (105) comprises an upper conveying chain (105u) for supporting the vehicle, a support seat (112) is provided at the lower portion of the upper conveying chain (105u), and the support wheel (111) travels along the support seat (112); The support seat (112) is provided with a plurality of non-return devices (121), and the plurality of non-return devices (121) are distributed at intervals along the front-to-back direction of the support seat (112) in such a manner that the distance in the front-to-back direction is an integer multiple of the distance between two adjacent support wheels (111) in the front-to-back direction. At least a portion of the support wheels (111) are restricted by the non-return devices (121) to move only in the incoming direction of the vehicle, so that the first conveying chain (105) can only be driven in the incoming direction of the vehicle. The non-return device (121) includes a swingable non-return block (122) and a spring member that applies force to the non-return block (122) in an upward direction. When the support wheel (111) provided on the inner side of the first supporting plate (109) of the first conveying chain (105) rolls in the front direction of the support seat (112), the support wheel (111) presses the non-return block (122) and crosses over the non-return block (122); after the support wheel (111) crosses over the non-return block (122), the non-return block (122) is driven by the spring member to reset in an upward direction.

2. The conveying device for a car washing system according to claim 1, characterized in that: The first linear body (100) further comprises: A first supporting assembly (106) supports one of the front end and the rear end of the first conveying chain (105); a second supporting assembly (107) supporting the other of the front end and the rear end of the first conveying chain (105); At least one of the first support assembly (106) and the second support assembly (107) is configured to be drivable only in the incoming direction of the vehicle.

3. The conveying device for a car washing system according to claim 2, characterized in that: The first support assembly (106) comprises: A first transmission wheel (113) engages with the first conveying chain (105); A first support shaft (114), supporting the first transmission wheel (113); Two first bearing seats (115), respectively supporting two axial ends of the first support shaft (114); in, The bearing of at least one of the two first bearing seats (115) is a one-way bearing that rotates only in the incoming direction of the vehicle; and / or, The first support shaft (114) or the first transmission wheel (113) is restricted to rotate only in the incoming direction of the vehicle by a first ratchet and pawl mechanism (123).

4. The conveying device for a car washing system according to claim 2 or 3, characterized in that: The second support assembly (107) comprises: A second transmission wheel (117) engages with the first conveying chain (105); A second support shaft (118), supporting the second transmission wheel (117); A second bearing seat (119), supporting the second support shaft (118); in, The bearing of the second bearing seat (119) is a one-way bearing that rotates only in the incoming direction of the vehicle; and / or, The second support shaft (118) or the second transmission wheel (117) is restricted to rotate only in the incoming direction of the vehicle by a second ratchet and pawl mechanism.

5. The conveying device for a car washing system according to claim 1, characterized in that: A first limiting block (124) for limiting the wheel of the vehicle is provided on the outside of at least a portion of the plurality of first bearing plates (109).

6. The conveying device for a car washing system according to claim 1, characterized in that: The second linear body (101) comprises: a second conveyor chain (127) supporting the vehicle; a fourth support assembly (128) supporting one of the front end and the rear end of the second conveying chain (127), the fourth support assembly (128) having a transmission shaft (131) for supporting the second conveying chain (127); a fifth supporting assembly (129) supporting the other of the front end and the rear end of the second conveying chain (127); The second drive motor (130) is connected to the transmission shaft (131).

7. The conveying device for a car washing system according to claim 6, characterized in that: The second conveying chain (127) comprises: Second chain main body (132); A plurality of second bearing plates (133) are respectively mounted on the second chain body (132); A plurality of second limiting blocks (134) are evenly and spacedly installed on the outsides of different second bearing plates (133) along the length direction of the second chain body (132).

8. The conveying device for a car washing system according to claim 1, characterized in that: A first transfer line body (135) is provided at the docking position between the first line body (100) and the second line body (101); A second transfer line (136) is provided at the docking position between the second line (101) and the third line (102); The first transfer line body (135) and the second transfer line body (136) respectively include a transfer roller (137) that can be driven only along the incoming direction of the vehicle.

9. A conveying device for a car wash system, used for conveying vehicles, characterized in that: include: A first linear body (100) is provided at the rear end of the conveying device for the vehicle washing system and is used to carry vehicles that have come in and stopped. The first linear body (100) can only be driven in the direction in which the vehicles come in; A second line body (101) is arranged in front of the first line body (100) along the incoming direction of the vehicle, docked with the first line body (100) to transfer the vehicle stopped at the first line body (100), and the second line body (101) is driven along the incoming direction of the vehicle; A third line body (102) is arranged in front of the second line body (101) along the incoming direction of the vehicle, docked with the second line body (101) and carrying the vehicle driven and transferred by the second line body (101), and the third line body (102) can only be driven along the incoming direction of the vehicle; The third thread body (102) has: a first conveying chain (105) supporting the vehicle, wherein the first conveying chain (105) comprises: a first chain body (108) and a plurality of first bearing plates (109) mounted on the first chain body (108); The first bearing plates (109) bear the vehicle, and a support wheel (111) is provided on the inner side of each first bearing plate (109); The first conveying chain (105) comprises an upper conveying chain (105u) for supporting the vehicle, a support seat (112) is provided at the lower portion of the upper conveying chain (105u), and the support wheel (111) travels along the support seat (112); The support seat (112) is provided with a plurality of non-return devices (121), and the plurality of non-return devices (121) are distributed at intervals along the front-to-back direction of the support seat (112) in such a manner that the distance in the front-to-back direction is an integer multiple of the distance between two adjacent support wheels (111) in the front-to-back direction. At least a portion of the support wheels (111) are restricted by the non-return devices (121) to move only in the incoming direction of the vehicle, so that the first conveying chain (105) can only be driven in the incoming direction of the vehicle. The non-return device (121) includes a swingable non-return block (122) and a spring member that applies force to the non-return block (122) in an upward direction. When the support wheel (111) provided on the inner side of the first supporting plate (109) of the first conveying chain (105) rolls in the front direction of the support seat (112), the support wheel (111) presses the non-return block (122) and crosses over the non-return block (122); after the support wheel (111) crosses over the non-return block (122), the non-return block (122) is driven by the spring member to reset in an upward direction.

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