Protective device for AGV (Automatic Guided Vehicle) and AGV

Abstract

The utility model discloses a protection device for an AGV and the AGV, the protection device comprises a first cover body and a second cover body, the first cover body and the second cover body are connected with each other to form a connecting body with a through space in the first direction, the first cover body is connected with one of the two ends, in the first direction, of an AGV pallet fork, and the second cover body is connected with the other one of the two ends, in the first direction, of the AGV pallet fork; wherein at least one of the first cover body and the second cover body can be telescopically deformed in the first direction, and the orthographic projection of the first cover body in the first direction falls into the range of the second cover body. According to the embodiment of the invention, the protection device can synchronously stretch out and draw back along with the AGV pallet fork to reduce dust entering the AGV pallet fork, and the smaller first cover body is connected with the operation end of the AGV pallet fork, so that the AGV pallet fork with the protection device can normally enter and exit a goods shelf to complete goods picking operation.

Description

Technical Field

[0001] The present application belongs to the technical field of cargo sorting, and in particular, relates to a protective device for an AGV and an AGV. Background Art

[0002] With the widespread application of automated warehouses in the field of warehousing and logistics, automatic guided vehicles (AGVs) are used in various work scenarios. AGVs can pick up goods and transport them by moving themselves. Among them, for working environments with a lot of dust, it is necessary to protect the exposed moving parts and electronic components of AGVs.

[0003] In related products, AGV enters and exits the shelf and picks up goods by extending and retracting the AGV fork. Therefore, it is necessary to provide a protective device that does not affect the AGV fork entering and exiting the shelf. Utility Model Content

[0004] The embodiment of the present application provides a protective device for an AGV and an AGV. The protective device for the AGV can protect the AGV fork without affecting the AGV fork entering and exiting the shelf, so as to extend the service life of the AGV fork in a dusty environment.

[0005] In a first aspect, an embodiment of the present application provides a protective device for an AGV, comprising a first cover body and a second cover body, wherein the first cover body and the second cover body are connected to each other to form a connecting body having a through space in a first direction, and the first cover body is connected to one of the two ends of the AGV fork along the first direction, and the second cover body is connected to the other end; wherein at least one of the first cover body and the second cover body can be telescopically deformed along the first direction, and the orthographic projection of the first cover body in the first direction falls within the range of the second cover body.

[0006] In some embodiments, the second cover body includes a cover body and a connecting plate, the connecting plate is arranged at the end of the cover body close to the first cover body, the first cover body is fixedly connected to the connecting plate, and the orthographic projection of the connecting plate in the first direction at least partially overlaps with the orthographic projection of the first cover body in the first direction.

[0007] In some embodiments, the connection method between the first cover body and the connecting plate includes at least one of bonding, welding, threaded connection and riveting.

[0008] In some embodiments, the first cover body is provided with two first connecting members, the first cover body is fixedly connected to the AGV fork through the first connecting members, the two first connecting members are arranged on both sides of the first cover body along the second direction, and the two first connecting members extend towards each other.

[0009] In some embodiments, the first cover further has a second connecting member, the second connecting member is disposed between the two first connecting members along a second direction, and the second connecting member is spaced apart from the first connecting member along a third direction.

[0010] In some embodiments, the second cover has two third connecting members, the second cover is connected to the frame through the third connecting members, the two third connecting members are respectively disposed on two sides of the second cover along the second direction, and the two third connecting members extend towards each other.

[0011] In some embodiments, the second cover further has a fourth connecting member, the fourth connecting member is disposed between the two third connecting members along the second direction, and the fourth connecting member is spaced apart from the third connecting member along the third direction.

[0012] In some embodiments, the first cover includes a plurality of first frameworks arranged along a first direction, adjacent two first frameworks are connected by a fireproof and flame-retardant cloth, the first framework includes a first top rib and two first side ribs, the two first side ribs are respectively disposed at two ends of the first top rib and extend in the same direction.

[0013] In some embodiments, the second cover includes a plurality of second frameworks arranged along the first direction, adjacent two second frameworks are connected by a fireproof and flame-retardant cloth, the second framework includes a second top rib and two second side ribs, the two second side ribs are respectively disposed at two ends of the second top rib and extend in the same direction.

[0014] In a second aspect, an embodiment of the present application provides an AGV, the AGV includes a traveling mechanism, an AGV fork and the protection device provided in any of the foregoing embodiments, the traveling mechanism is fixed with a frame; the AGV fork reciprocates along the frame to approach or move away from the goods, the AGV fork has a large end and a small end along a first direction; wherein, the first cover is fixedly connected to the small end of the AGV fork, the second cover is fixedly connected to the large end of the AGV fork, when the AGV fork reciprocates along the frame, the protection device for the AGV shortens or elongates to protect the AGV fork.

[0015] The protection device for the AGV in the embodiment of the present application is provided with a first cover and a second cover, the first cover and the second cover are respectively connected to two ends of the AGV fork, and at least one of the first cover and the second cover can be telescopically deformed to protect the working AGV fork. Among them, the smaller first cover is connected to the working end of the AGV fork, so that the AGV fork with the protection device for the AGV can normally enter and exit the shelf to complete the goods picking operation. Description of the Drawings

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. Also, in all the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0017] Figure 1 is a schematic structural view of the protection device for an AGV according to an embodiment of the present application;

[0018] Figure 2 is Figure 1 a schematic structural view of the protection device for the AGV shown;

[0019] Figure 3 is Figure 1 a schematic structural view of the first skeleton for the protection device shown;

[0020] Figure 4 is a schematic structural view of the second skeleton in some embodiments.

[0021] The reference numerals in the specific embodiments are as follows:

[0022] 100, the first cover; 101, the first skeleton; 1011, the first top rib; 1012, the first side rib; 110, the first connecting member; 120, the second connecting member;

[0023] 200, the second cover; 201, the second skeleton; 2011, the second top rib; 2012, the second side rib; 2013, the second bottom rib; 210, the connecting plate; 220, the third connecting member; 230, the fourth connecting member;

[0024] The first direction X; the second direction Y; the third direction Z. Specific embodiments

[0025] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and, therefore, are only examples and should not be used to limit the protection scope of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0028] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0030] In the description of the embodiments of the present application, the term "a plurality" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0031] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of the present application.

[0032] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0033] With the widespread application of automated warehouses in the field of warehousing and logistics, automatic guided vehicles (AGVs) are used in various work scenarios. AGVs can pick up goods and transport them by moving themselves. Among them, for working environments with a lot of dust, it is necessary to protect the exposed moving parts and electronic components of AGVs.

[0034] Among the related products, AGV can travel along a preset route in the warehouse and carry and transfer goods. Specifically, the AGV fork extends into the shelf to approach and pick up the goods. After the goods are fixed on the working end of the AGV fork, the AGV fork retracts, and then the goods are transferred by the movement of the AGV in the warehouse. Among them, the AGV fork is composed of multiple sections of slide rails of different sizes, and the relative sliding between these slide rails enables the overall extension and retraction of the AGV fork to approach or move away from the shelf. The volume of the AGV fork will change during the extension and retraction process. In this regard, some protective devices are designed based on the specifications of the largest section of the multi-section slide rail. However, such a designed protective device is easy to affect the movement of the AGV fork in and out of the shelf during use.

[0035] In order to solve the problems of the prior art, an embodiment of the present application provides a protective device for an AGV and an AGV. The protective device for an AGV provided by the embodiment of the present application is first introduced below.

[0036] First, see Figure 1 The embodiment of the present application provides a protective device for AGV, including a first cover body 100 and a second cover body 200, wherein the first cover body 100 and the second cover body 200 are connected to each other to form a connecting body having a through space in the first direction, so that the AGV fork can be accommodated in the through space, wherein the orthographic projection of the first cover body 100 in the first direction falls within the range of the second cover body 200. The smaller first cover body 100 can be connected to the slide rail located at the operating end of the AGV fork, and the specifications of the operating end of the AGV fork are controlled by the structural design of the first cover body 100, so that the operating end of the AGV fork can smoothly enter and exit the shelf to complete the cargo picking operation; the larger second cover body 200 can cover the largest slide rail in the AGV fork, so that the protective device for AGV can protect the entire section of the AGV fork in operation.

[0037] The first cover 100 is fixedly connected to one of the two ends of the AGV fork along the first direction, and the second cover 200 is connected to the other end. At least one of the first cover 100 and the second cover 200 can be extended and deformed along the first direction. When the AGV fork enters and exits the shelf to pick up goods, the AGV protective device can be extended and retracted synchronously with the AGV fork to reduce the negative impact of the dust environment on the moving AGV fork.

[0038] Optionally, the first cover 100 is independently telescopic and deformable.

[0039] Optionally, the second cover 200 is independently telescopic and deformable.

[0040] Optionally, both the first cover 100 and the second cover 200 are telescopic and deformable to achieve a change in the overall length of the protection device for the AGV.

[0041] Please refer to Figure 1 , according to some embodiments of the present application, the second cover 200 includes a cover body and a connecting plate 210. The connecting plate 210 is disposed at an end of the cover body close to the first cover 100, and the first cover 100 is fixedly connected to the connecting plate 210.

[0042] Wherein, the orthographic projection of the connecting plate 210 in the first direction at least partially overlaps with the orthographic projection of the first cover 100 in the first direction, that is, the first cover 100 is in contact with the connecting plate 210 for connection.

[0043] Optionally, the orthographic projection of the first cover 100 in the first direction falls within the orthographic projection of the connecting plate 210 in the first direction.

[0044] Optionally, the connection method between the first cover 100 and the connecting plate 210 includes at least one of bonding, welding, screw connection, and riveting.

[0045] Optionally, the first cover 100 and the connecting plate 210 are fixedly bonded by AB glue.

[0046] Optionally, a fireproof and flame-retardant cloth is provided between the first cover 100 and the connecting plate 210.

[0047] Thus, the first cover 100 is fixedly connected to the second cover 200 through the connecting plate 210, improving the protection effect on the AGV fork at the connection between the first cover 100 and the second cover 200.

[0048] Please continue to refer to Figure 1 , according to some embodiments of the present application, the first cover 100 is provided with two first connectors 110, and the first cover 100 is fixedly connected to the AGV fork through the first connectors 110.

[0049] Optionally, there are two first connectors 110, and the two first connectors 110 are separately disposed on both sides of the first cover 100 along the second direction.

[0050] Further optionally, the first connector 110 includes a first stop portion, and the two first stop portions extend towards each other to prevent the AGV fork during operation from becoming disengaged, avoiding the separation of the AGV fork from the first cover 100.

[0051] Optionally, the first connecting member 110 further includes a first spacer portion extending in the first direction, and the first stop portion is mounted to the end of the first housing 100 through the first spacer portion.

[0052] Optionally, the first stop portion is provided with a first connection hole, and the first stop portion is fixedly connected to the AGV fork through a threaded connecting member.

[0053] Optionally, the first connecting member 110 is formed by bending a sheet metal.

[0054] Thus, the end of the first housing 100 moves synchronously with the working end of the AGV fork, so as to drive the protection device for the AGV to undergo telescopic deformation following the AGV fork, and protect the AGV fork during the operation of the AGV fork.

[0055] Please continue to refer to Figure 1 , according to some embodiments of the present application, the first housing 100 is further provided with a second connecting member 120, and the second connecting member 120 and the first connecting member 110 are disposed at the same-side ends of the first housing 100.

[0056] Optionally, the second connecting member 120 is disposed between two first connecting members 110 in the second direction.

[0057] Optionally, along the third direction, the second connecting member 120 and the first connecting member 110 are spaced apart, reducing the jump in the third direction between the first housing 100 and the AGV fork.

[0058] Optionally, the second connecting member 120 includes a positioning portion extending toward the AGV fork. When the first housing 100 is connected to the AGV fork, the positioning portion contacts the AGV fork to position the first housing 100 in the third direction.

[0059] Further optionally, the second connecting member 120 further includes a second spacer portion and a second stop portion. The second stop portion is connected to the positioning portion through the second spacer portion, and the second stop portion further extends toward the AGV fork based on the second spacer portion.

[0060] Optionally, the second stop portion is provided with a second connection hole, and the second stop portion is fixedly connected to the AGV fork through a threaded connecting member.

[0061] Optionally, the second connecting member 120 is formed by bending a sheet metal.

[0062] Thus, by providing the second connecting member 120, the connection stability between the first housing 100 and the AGV fork is further enhanced.

[0063] Please refer to Figure 2, according to some embodiments of the present application, the second cover 200 is provided with a third connecting member 220, and the second cover 200 is connected to the frame of the AGV through the third connecting member 220.

[0064] Optionally, there are two third connecting members 220, and the two third connecting members 220 are respectively arranged on both sides of the second cover 200 along the second direction.

[0065] Optionally, the third connecting member 220 includes a third stop portion, and the two third stop portions extend towards each other.

[0066] Optionally, the third connecting member 220 further includes a third spacer portion, and the third stop portion is mounted on the end of the second cover 200 through the third spacer portion.

[0067] Optionally, the third stop portion is provided with a third connection hole, and the third stop portion is fixedly connected to the frame through a threaded connection member.

[0068] Optionally, the third connecting member 220 is formed by bending a sheet metal.

[0069] Thus, when the AGV fork expands and contracts and deforms, the first cover 100 connected to the AGV fork moves relative to the second cover 200 connected to the frame, so as to drive the protection device for the AGV to expand and contract and deform following the movement of the AGV fork.

[0070] Please continue to refer to Figure 2 , according to some embodiments of the present application, the second cover 200 is further provided with a fourth connecting member 230, and the fourth connecting member 230 and the third connecting member 220 are arranged at the same-side end of the second cover 200.

[0071] Optionally, the fourth connecting member 230 is arranged between the two third connecting members 220 along the second direction.

[0072] Optionally, along the third direction, the fourth connecting member 230 and the third connecting member 220 are spaced apart, reducing the jumping along the third direction between the second cover 200 and the frame.

[0073] Optionally, there are two fourth connecting members 230, and the two fourth connecting members 230 are spaced apart along the second direction.

[0074] Optionally, the fourth connecting member 230 includes a fourth stop portion extending towards the AGV fork, the fourth stop portion is provided with a fourth connection hole, and the fourth connection hole is fixedly connected to the frame through a threaded connection member.

[0075] Optionally, the fourth connecting member 230 is formed by bending a sheet metal.

[0076] Thus, by providing the fourth connecting member 230, the connection stability between the second cover 200 and the frame is further strengthened.

[0077] Please refer to Figure 1 or Figure 2 , according to some embodiments of the present application, the first cover 100 includes a plurality of first skeletons 101 arranged along a first direction. When the AGV fork drives the connecting plate 210 to move along the first direction through the second cover 200, the distance between any two adjacent first skeletons 101 changes synchronously to achieve the telescopic expansion of the overall length of the first cover 100.

[0078] Optionally, adjacent two first skeletons 101 are connected by a fireproof and flame-retardant cloth.

[0079] Optionally, adjacent two first skeletons 101 are connected by a scissor structure.

[0080] Thus, the first cover 100 can be telescopically deformed along the first direction to adapt to the length change during the operation of the AGV fork.

[0081] Please refer to Figure 3 , optionally, the first skeleton 101 includes a first top rib 1011 and two first side ribs 1012. The two first side ribs 1012 are disposed at two ends of the first top rib 1011 and extend in the same direction. A notch is formed at the bottom of the first skeleton 101 to facilitate the first cover 100 to be sleeved from above the rack and fixedly installed with the rack.

[0082] Optionally, the connection between the first top rib 1011 and the first side rib 1012 has a smooth transition.

[0083] Optionally, a chamfering treatment is performed at the connection between the first top rib 1011 and the first side rib 1012.

[0084] Please refer to Figure 1 or Figure 2 , according to some embodiments of the present application, the second cover 200 includes a plurality of second skeletons 201 arranged along the first direction. When the AGV fork drives the second cover 200 to move along the first direction, the distance between any two adjacent second skeletons 201 changes synchronously to achieve the telescopic expansion of the overall length of the second cover 200.

[0085] Optionally, along the first direction, among any two second skeletons 201, the second skeleton 201 closer to the first cover 100 is smaller than the second skeleton 201 farther from the first cover 100.

[0086] Optionally, each second skeleton 201 has the same size.

[0087] Optionally, adjacent two second skeletons 201 are connected by a fireproof and flame-retardant cloth.

[0088] Optionally, adjacent two second skeletons 201 are connected by a scissor structure.

[0089] Thus, the second cover 200 can be telescopically deformed in the first direction to protect the operating end of the AGV fork during movement.

[0090] Please refer to Figure 4 , optionally, the second skeleton 201 includes a second top rib 2011 and two second side ribs 2012. The two second side ribs 2012 are disposed at two ends of the second top rib 2011 along the second direction and extend in the same direction. A notch is formed at the bottom of the second skeleton 201 to facilitate the second cover 200 to be sleeved from above the AGV fork and fixedly installed with the AGV fork.

[0091] Optionally, the connection between the second top rib 2011 and the second side rib 2012 has a smooth transition.

[0092] Optionally, a chamfering treatment is performed at the connection between the second top rib 2011 and the second side rib 2012.

[0093] Please continue to refer to Figure 4 , further optionally, the second skeleton 201 further includes a second bottom rib 2013. The second bottom rib 2013 is formed by extending from the end of the second side rib 2012 away from the second top rib 2011 along the second direction. At this time, the second skeleton 201 enters from the end of the rack in the first direction and is sleeved outside the AGV fork, and is fixedly installed with the rack at least through the third connecting member 220.

[0094] In a second aspect, an embodiment of the present application provides an AGV, which includes a traveling mechanism, an AGV fork, and the protection device provided in any one of the foregoing embodiments. The traveling mechanism is fixed with a rack, and the AGV fork reciprocates along the rack to approach or move away from the goods to complete goods picking. Among them, the AGV fork has a large end and a small end in the first direction. The first cover 100 is fixedly connected to the small end of the AGV fork, and the second cover 200 is fixedly connected to the large end of the AGV fork. When the AGV fork reciprocates along the rack, the protection device for the AGV shortens or elongates to protect the AGV fork.

[0095] It can be understood that since the AGV includes the protection device for the AGV provided in any one of the foregoing embodiments, the AGV also has all the beneficial effects of the foregoing protection device for the AGV.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A protection device for an AGV, characterized in that, It includes a first cover body and a second cover body. The first cover body and the second cover body are connected to each other to form a connecting body having a through space in the first direction, and the first cover body is connected to one of the two ends of the AGV fork in the first direction, and the second cover body is connected to the other end; Wherein, at least one of the first cover body and the second cover body can be telescoped and deformed in the first direction, and the orthographic projection of the first cover body in the first direction falls within the range of the second cover body.

2. The protection device for an AGV according to claim 1, characterized in that, The second cover body includes a cover main body and a connecting plate. The connecting plate is arranged at the end of the cover main body close to the first cover body. The first cover body is fixedly connected to the connecting plate, and the orthographic projection of the connecting plate in the first direction at least partially overlaps with the orthographic projection of the first cover body in the first direction.

3. The protection device for AGV according to claim 2, characterized in that, The connection method between the first cover body and the connecting plate includes at least one of bonding, welding, threaded connection and riveting.

4. The protection device for AGV according to claim 1, characterized in that, The first cover body is provided with two first connecting members. The first cover body is fixedly connected to the AGV fork through the first connecting members. The two first connecting members are arranged on both sides of the first cover body in the second direction, and the two first connecting members extend towards each other.

5. The protective device for AGV according to claim 4, wherein, The first cover body is further provided with a second connecting member. The second connecting member is arranged between the two first connecting members in the second direction, and the second connecting member is spaced from the first connecting member in the third direction.

6. The protection device for an AGV according to claim 1, characterized in that, The second cover body is provided with two third connecting members. The second cover body is connected to the frame through the third connecting members. The two third connecting members are arranged on both sides of the second cover body in the second direction, and the two third connecting members extend towards each other.

7. The protection device for an AGV according to claim 6, characterized in that, The second cover body is further provided with a fourth connecting member. The fourth connecting member is arranged between the two third connecting members in the second direction, and the fourth connecting member is spaced from the third connecting member in the third direction.

8. The protection device for AGV according to any one of claims 1 to 7, characterized in that, The first cover body includes a plurality of first skeletons arranged in the first direction. Adjacent two of the first skeletons are connected by a fireproof and flame-retardant cloth. The first skeleton includes a first top rib and two first side ribs. The two first side ribs are arranged at the two ends of the first top rib and extend in the same direction.

9. The protection device for an AGV according to claim 8, wherein, The second cover body includes a plurality of second skeletons arranged in the first direction. Adjacent two of the second skeletons are connected by a fireproof and flame-retardant cloth. The second skeleton includes a second top rib and two second side ribs. The two second side ribs are arranged at the two ends of the second top rib and extend in the same direction.

10. An AGV, characterized in that, It includes: A traveling mechanism, and a frame is fixed to the traveling mechanism; An AGV fork, the AGV fork reciprocates along the frame to approach or move away from the goods, and the AGV fork has a large end and a small end in the first direction; The protection device for AGV according to any one of claims 1 to 9, wherein the first cover body is fixedly connected to the small end of the AGV fork, and the second cover body is fixedly connected to the large end of the AGV fork. When the AGV fork reciprocates along the frame, the protection device for AGV shortens or elongates to protect the AGV fork.

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