Guardrail locking mechanism and picking vehicle

Abstract

The invention relates to the technical field of picking vehicles, and particularly discloses a guardrail locking mechanism and a picking vehicle, the guardrail locking mechanism comprises a positioning block, a first elastic piece, a locking piece and an unlocking piece, the positioning block is fixed at the bottom end of a guardrail and synchronously rotates along with the guardrail, and the positioning block is arranged in a containing groove of an operation platform and is provided with a first limit position and a second limit position; the first elastic piece is connected with one end of the positioning block and drives the positioning block to move towards the limiting position, the locking piece is arranged on the operation platform in a lifting mode, when the positioning block is located at the first limiting position, the lower end of the locking piece can be inserted into the containing groove to be attached to and locked with one side of the positioning block, the unlocking piece penetrates through the operation platform in the vertical direction, and the upper end of the unlocking piece is connected with the locking piece. When the operation platform descends to the first preset height, the lower end of the unlocking piece abuts against the bottom frame and moves upwards, the locking piece is driven to be separated from the containing groove to unlock the positioning block, the guardrail can be automatically unlocked when the operation platform descends, and the operation safety and convenience of the picking vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of order picking vehicles, and in particular to a guardrail locking mechanism and an order picking vehicle. Background Art

[0002] With the rapid development of the logistics and warehousing industry, picking carts, as important equipment in warehousing and logistics operations, are widely used in cargo picking operations in various warehouses. Picking carts usually include a chassis, a support frame, an operating platform, and a pallet. The operating platform can be raised and lowered so that operators can perform picking operations at different heights. In order to ensure the safety of operators, a guardrail structure is usually set on the operating platform of the picking cart to prevent operators from falling accidents when working at high altitudes.

[0003] However, the guardrail locking mechanism in the prior art has the following technical problems:

[0004] First, when the guardrail is raised to a higher height along with the operating platform, the existing guardrail locking mechanism usually cannot realize the automatic locking function, and the operator needs to manually lock it using components such as bolts or latches. This operation method is not only cumbersome, but also easy for the operator to forget to lock it due to negligence, resulting in the guardrail being in an unsafe state during high-altitude operations, which is very likely to cause safety accidents.

[0005] Secondly, the existing guardrail locking mechanism may cause the guardrail to be accidentally unlocked due to factors such as vibration or collision during the lifting of the operating platform, causing the guardrail to change from a protective state to a retracted state, failing to provide effective safety protection for the operator and posing a serious safety hazard.

[0006] In addition, the existing guardrail locking mechanism lacks automatic locking and unlocking functions related to the height of the operating platform, and cannot automatically adjust the locking state of the guardrail according to the actual height of the operating platform, which increases the operating burden of the operator and reduces the safety and convenience of the equipment. Summary of the Invention

[0007] The present invention is made in consideration of the above-mentioned problems. The purpose of the invention is to provide a guardrail locking mechanism and a picking vehicle, which realize the automatic locking and unlocking functions of the guardrail, are more convenient to operate, and have better locking stability, which can avoid safety accidents caused by forgetfulness.

[0008] To achieve the above-mentioned object, the present invention provides a guardrail locking mechanism, wherein the guardrail is rotatably arranged on the operating platform of a picking vehicle, the picking vehicle further comprising a chassis and a support frame arranged vertically on the chassis, the operating platform being liftably arranged on one side of the support frame, and the locking mechanism comprising:

[0009] a positioning block fixed to the bottom end of the guardrail and rotating synchronously therewith, the positioning block being arranged in the receiving groove of the operating platform, and the positioning block having a first extreme position and a second extreme position, when the positioning block is in the first extreme position, the guardrail is in a protective state, and when the positioning block is in the second extreme position, the guardrail is in a retracted state;

[0010] a first elastic member connected to one end of the positioning block and used to drive the positioning block to move toward the first limit position or the second limit position;

[0011] a locking member, which is movably disposed on the operating platform, and when the positioning block is located at the first limit position, the lower end of the locking member can be inserted into the receiving groove and can be in contact with one side of the positioning block to lock the positioning block;

[0012] an unlocking member vertically extending through the operating platform, wherein the upper end of the unlocking member is connected to the locking member and the lower end of the unlocking member extends to the bottom of the operating platform;

[0013] When the operating platform descends to a first preset height, the lower end of the unlocking member abuts against the base frame and moves upward, driving the locking member to disengage from the accommodating groove to unlock the positioning block.

[0014] According to the guardrail locking mechanism described above, a positioning protrusion is provided on the positioning block, a positioning protrusion is provided on the positioning block, a positioning groove is provided on the side wall of the accommodating groove, and a first side wall and a second side wall are provided in the positioning groove. When the positioning block is located at the first extreme position, one side of the positioning protrusion abuts against the first side wall, and when the positioning block is located at the second extreme position, the other side of the positioning protrusion abuts against the second side wall.

[0015] According to the guardrail locking mechanism described above, it is characterized in that the locking piece includes an insert block, the lower end of the insert block can be inserted into the positioning groove, and the lower end of the insert block has a locking plane and a guide slope. When the positioning block is located at the first extreme position, the locking plane can abut against the side of the positioning protrusion away from the first side wall, and the guide slope is obliquely arranged between the first side wall and the second side wall, and inclined toward the first side wall.

[0016] According to the guardrail locking mechanism described above, the operating platform is provided with a support plate, the support plate is provided with a plurality of adjustment holes in the vertical direction, a positioning shaft is provided in one of the adjustment holes, the insert block is provided with an adjustment slot arranged in the vertical direction, and the positioning shaft is movably inserted into the adjustment slot;

[0017] The locking member also includes a pull-down spring, a lug plate is provided on one side of the upper end of the plug block, the lower end of the pull-down spring is connected to the operating platform, the upper end of the pull-down spring is connected to the lug plate, and the pull-down spring is in a stretched state.

[0018] According to the guardrail locking mechanism described above, the first elastic member includes a positioning spring, a first connecting column is provided at the bottom of the operating platform, a second connecting column is provided on the end of the positioning block close to the positioning protrusion, and the end of the positioning block away from the second connecting column is connected to the bottom end of the guardrail, and the two ends of the positioning spring are respectively rotatably connected to the first connecting column and the second connecting column.

[0019] According to the guardrail locking mechanism described above, the positioning block also has a dead point position. When the positioning block is at the dead point position, the hinge point between the positioning protrusion and the first connecting column, the connection point between the positioning block and the guardrail, and the hinge point between the positioning protrusion and the second connecting column are all located on the same straight line. The first limit position is located on the left side of the dead point position, and the second limit position is located on the right side of the dead point position.

[0020] According to the above-mentioned guardrail locking mechanism, the unlocking member includes a positioning seat, a pin shaft, a compression spring and a lifting part. The positioning seat is fixed on the operating platform, the pin shaft is passed through the positioning seat, the compression spring is sleeved on the outside of the pin shaft, and is used to provide a downward elastic force for the pin shaft. The lifting part is fixedly connected to the upper end of the pin shaft, and the upper end of the locking member is in contact with the top of the retaining ring on the side of the lifting part through a connecting plate.

[0021] According to the guardrail locking mechanism described above, the top of the positioning seat is provided with two first grooves arranged opposite to each other and two second grooves arranged opposite to each other, the depth of the first groove is greater than the depth of the second groove, and the bottom of the lifting part is provided with a limit block, and the limit block can be inserted into the first groove or the second groove. When the limit block is inserted into the second groove, the lower end of the locking member can be separated from the accommodating groove.

[0022] According to the guardrail locking mechanism described above, a buffer block is provided on the bottom end of the pin shaft, and the buffer block is made of elastic material.

[0023] A picking vehicle, comprising:

[0024] chassis;

[0025] a support frame, which is arranged in the middle of the base frame in a vertical direction;

[0026] An operating platform, which is escalably arranged on one side of the support frame and has a guardrail;

[0027] a tray, which is liftably arranged on the other side of the support frame;

[0028] The guardrail locking mechanism as described above is arranged on the operating platform and connected to the guardrail.

[0029] The present invention has the following beneficial effects:

[0030] 1. By setting up a physical contact mechanism between the unlocking member and the base frame, when the operating platform descends to a preset height, the lower end of the unlocking member contacts the base frame and moves upward, driving the locking member out of the receiving groove, automatically releasing the guardrail lock state without manual intervention, realizing the automatic unlocking function of the guardrail;

[0031] 2. When the operating platform rises, the unlocking member disengages from the base frame, and the locking member automatically moves downward and inserts into the receiving groove under the action of the downward pressure spring. The operator only needs to push the guardrail to rotate, so that the positioning block moves to the first limit position. At this time, the locking member abuts against the positioning block under the drive of the first elastic member, realizing the automatic locking of the guardrail, avoiding safety accidents caused by forgetting to lock the guardrail during high-altitude operations;

[0032] 3. Through the design of the lifting part, under special working requirements, the lifting part can be pulled up and rotated 90 degrees to make the limit block fit into the second groove, realizing the manual unlocking function of the guardrail, which enhances the applicability and flexibility of the equipment;

[0033] 4. As the guardrail rotates, the positioning spring can switch the direction of the force applied to the locking member, thereby driving the locking member to maintain the first limit position or the second limit position, thereby preventing the guardrail from rotating randomly in the unlocked state and improving its stability;

[0034] 5. The overall structure is reasonably designed and easy to operate, which improves the safety and convenience of the logistics warehousing picking vehicle operating platform and is particularly suitable for frequent lifting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 2. It is a schematic diagram of the overall structure of the picking vehicle of the embodiment;

[0036] Figure 2 This is a schematic diagram of the locking mechanism assembly of the embodiment;

[0037] Figure 3 1. It is a schematic diagram of the assembly of the locking member and the unlocking member of the embodiment;

[0038] Figure 4 Schematic diagram of the exploded structure of the unlocking piece in the embodiment.

[0039] In the picture:

[0040] 100, locking mechanism; 110, positioning block; 111, positioning protrusion; 112, second connecting column; 120, positioning spring; 130, locking member; 131, inserting block; 131a, locking plane; 131b, guiding slope; 131c, adjusting groove; 131d, ear plate; 132, connecting plate; 140, unlocking member; 141, positioning seat; 141a, first groove; 141b, second groove; 142, pin; 142a, buffer block; 143, compression spring; 144, lifting portion; 144a, limiting block;

[0041] 200, operating platform; 210, guardrail; 220, receiving groove; 221, positioning groove; 230, support plate; 231, adjustment hole; 240, first connecting column;

[0042] 300, chassis;

[0043] 400, support frame;

[0044] 500. Pallet. DETAILED DESCRIPTION

[0045] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0046] like Figure 1-4 As shown, a guardrail locking mechanism includes a positioning block 110, a first elastic member, a locking member 130 and an unlocking member 140.

[0047] The guardrail 210 is rotatably arranged on the operating platform 200 of the picking vehicle. The picking vehicle also includes a base frame 300 and a support frame 400 arranged on the base frame 300 in a vertical direction. The operating platform 200 is liftable and arranged on one side of the support frame 400. Since the picking vehicle is working, the driver needs to stand on the operating platform 200 to operate, and the operating platform 200 needs to be raised to a high altitude to improve the driver's field of vision. However, as the operating platform 200 rises, if the driver falls from the operating platform 200, Casualties may occur and the safety is extremely low, so it is necessary to set a guardrail 210 on the operating platform 200. Since the operating platform 200 has only three sides without obstructions, it is only necessary to set guardrails 210 on these three sides. The guardrails 210 set on the two symmetrical sides are both fixed guardrails 210, and the other side is set as a movable guardrail 210 to facilitate the driver to get on and off the operating platform 200. In this embodiment, the guardrail 210 specifically refers to the movable guardrail 210, which is set in two, and the two guardrails 210 are symmetrically arranged on the same side of the operating platform 200.

[0048] Specifically, the positioning block 110 is fixed to the bottom end of the guardrail 210 and rotates synchronously with it. The positioning block 110 is arranged in the receiving groove 220 of the operating platform 200, and the positioning block 110 has a first limit position and a second limit position. When the positioning block 110 is in the first limit position, the guardrail 210 is in a protective state. When the positioning block 110 is in the second limit position, the guardrail 210 is in a retracted state. Since the positioning block 110 rotates synchronously with the guardrail 210, when the positioning block 110 rotates to the first limit position, the guardrail 210 is in a closed state. The guardrail 210 also rotates to the extended position. At this time, the guardrail 210 can play a protective role, so it is in a protective state. When the positioning block 110 rotates to the second extreme position, the guardrail 210 also rotates to the retracted position. At this time, the guardrail 210 no longer blocks the driver, making it convenient for the driver or other objects to enter and exit the operating platform 200. The guardrail 210 is in a retracted state, and the positioning block 110 can only be displaced between the first extreme position and the second extreme position. The guardrail 210 can also only be switched between the maintenance state and the retracted state.

[0049] Specifically, the first elastic member is connected to one end of the positioning block 110 and is used to drive the positioning block 110 to move toward the first limit position or the second limit position. The locking member 130 is liftably arranged on the operating platform 200. When the positioning block 110 is at the first limit position, the lower end of the locking member 130 can be inserted into the accommodating groove 220 and can fit with one side of the positioning block 110 to lock the positioning block 110, thereby locking the guardrail 210 to prevent the guardrail 210 from being accidentally unlocked, thereby improving safety performance. The unlocking member 140 passes through the operating platform 200 in the vertical direction, the upper end of the unlocking member 140 is connected to the locking member 130, and the lower end of the unlocking member 140 extends to the bottom of the operating platform 200. When the operating platform 200 is unlocked, the unlocking member 140 is unlocked. When it descends to the first preset height, the lower end of the unlocking member 140 abuts against the base frame 300 and moves upward. The upward movement of the unlocking member 140 can drive the locking member 130 to move upward synchronously, so that the lower end of the locking member 130 can be disengaged from the accommodating groove 220, and the positioning block 110 is also unlocked. After unlocking, the positioning block 110 is elastically positioned by the first elastic member. As long as the driver applies a force greater than the elastic force on the guardrail 210, the guardrail 210 can be driven to rotate, thereby rotating it from the protective state to the retracted state, thereby realizing automatic unlocking of the positioning block 110 and the guardrail 210. No manual operation is required, and the functions of high-position locking and low-position automatic unlocking are realized, which not only improves safety performance but also reduces operation difficulty.

[0050] Furthermore, a positioning protrusion 111 is provided on the positioning block 110, and a positioning groove 221 is provided on the side wall of the accommodating groove 220. A first side wall and a second side wall are provided in the positioning groove 221. When the positioning block 110 is located at the first extreme position, one side of the positioning protrusion 111 abuts against the first side wall. When the positioning block 110 is located at the second extreme position, the other side of the positioning protrusion 111 abuts against the second side wall. The function of the positioning groove 221 is to limit the rotation angle of the positioning block 110, so that the positioning protrusion 111 can only be displaced within the positioning groove 221, thereby limiting the rotation angle of the guardrail 210.

[0051] Furthermore, the locking member 130 includes an insert block 131, the lower end of the insert block 131 can be inserted into the positioning groove 221, and the lower end of the insert block 131 has a locking plane 131a and a guiding inclined surface 131b. When the positioning block 110 is in the first extreme position, the locking plane 131a can abut against the side of the positioning protrusion 111 away from the first side wall, and the guiding inclined surface 131b is arranged obliquely between the first side wall and the second side wall, and inclined toward the first side wall. Since the insert block 131 is arranged in the vertical direction, when the positioning protrusion 111 abuts against the locking plane 131a, the positioning protrusion 111 cannot drive the insert block 131 to move up and down, and then the positioning block can be moved by the insert block 131. 110 is locked in the first extreme position, and when the positioning block 110 is in the second extreme position, since the positioning protrusion 111 abuts against the guide slope 131b, the movement of the positioning protrusion 111 can squeeze the insert block 131 upward, thereby realizing the rotation of the positioning block 110, which can move to the first extreme position, that is, the guardrail 210 is in the folded state, and the driver only needs to provide sufficient force on the guardrail 210 to drive the guardrail 210 to rotate to the deployed position, that is, the protective state. When the guardrail 210 is in the protective state, no matter how much force is applied to the guardrail 210, the guardrail 210 cannot be driven to rotate, thereby realizing rigid locking and improving safety performance.

[0052] Furthermore, in order to realize the up and down movement of the insert block 131 and limit its translation, a support plate 230 is provided on the operating platform 200. The support plate 230 is provided with a plurality of adjustment holes 231 in the vertical direction. A positioning shaft is provided in one of the adjustment holes 231. An adjustment slot 131c arranged in the vertical direction is provided on the insert block 131. The positioning shaft is movably passed through the adjustment slot 131c. The diameter of the positioning shaft is consistent with the width of the adjustment slot 131c. Therefore, when the position of the positioning shaft remains unchanged, the insert block 131 can only move up and down through the adjustment slot 131c. Its lowest position is the position where the positioning shaft abuts against the upper end of the adjustment slot 131c, and through The height of the plug 131 can be adjusted through the adjustment holes 231 of different heights, which is suitable for different models of plugs 131. The locking member 130 also includes a pull-down spring. An ear plate 131d is provided on one side of the upper end of the plug 131. The lower end of the pull-down spring is connected to the operating platform 200, and the upper end of the pull-down spring is connected to the ear plate 131d. The pull-down spring is in a stretched state, and the elastic force of the pull-down spring acts on the ear plate 131d, driving the plug 131 to always remain in the lowest position. At this time, the lower end of the plug 131 is located in the positioning groove 221. When the positioning block 110 is in the first extreme position, the plug 131 can always lock the positioning block 110.

[0053] Furthermore, the first elastic member includes a positioning spring 120, a first connecting column 240 is provided at the bottom of the operating platform 200, a second connecting column 112 is provided on the end of the positioning block 110 close to the positioning protrusion 111, and the end of the positioning block 110 away from the second connecting column 112 is connected to the bottom end of the guardrail 210, and the two ends of the positioning spring 120 can be rotatably connected to the first connecting column 240 and the second connecting column 112 respectively, wherein the position of the first connecting column 240 is fixed, but the position of the second connecting column 112 rotates with the rotation of the positioning block 110. During the rotation of the second connecting column 112, the distance between it and the first connecting column 240 is also continuously adjusted, and thus the direction of the force of the positioning spring 120 can also be adjusted.

[0054] Furthermore, the positioning block 110 also has a dead point position. When the positioning block 110 is at the dead point position, the hinge point between the positioning protrusion 111 and the first connecting column 240, the connection point between the positioning block 110 and the guardrail 210, and the hinge point between the positioning protrusion 111 and the second connecting column 112 are all located on the same straight line. In this state, the positioning spring 120 is stretched to its longest position. Whether the positioning block 110 moves from the first limit position to the second limit position or from the second limit position to the first limit position, the positioning block 110 needs to pass through the dead point position. The first limit position is located on the left side of the dead point position, and the second limit position is located at the dead point. On the right side of the position, taking the movement of the positioning block 110 from the second limit position to the first limit position as an example, during the movement from the second limit position to the dead point position, the positioning spring 120 is continuously stretched, and the elastic force of the positioning spring 120 acts toward the second limit position. At this time, the operator needs to apply force on the guardrail 210 to overcome the elastic force. When the positioning block 110 passes the dead point position, the positioning block 110 moves from the dead point position to the first limit position. The positioning spring 120 is continuously shortened, and its elastic force acts toward the first limit position, which can assist in driving the positioning block 110 to move toward the first limit position and elastically lock the positioning block 110.

[0055] Furthermore, the unlocking member 140 includes a positioning seat 141, a pin 142, a compression spring 143 and a lifting portion 144. The positioning seat 141 is fixed on the operating platform 200, the pin 142 is inserted into the positioning seat 141, the compression spring 143 is sleeved on the outside of the pin 142, and is used to provide a downward elastic force for the pin 142. The lifting portion 144 is fixedly connected to the upper end of the pin 142. The upper end of the locking member 130 is in contact with the top of the retaining ring on the side of the lifting portion 144 through the connecting plate 132. The pin 142 is movable through the positioning seat 141. On the positioning seat 141, gravity and the presence of the compression spring 143 can drive it to remain downward, so that the lower end of the pin shaft 142 can extend below the operating platform 200. After it abuts against the base frame 300, the pin shaft 142 can be driven to overcome the elastic force of the compression spring 143 and rise, which drives the lifting part 144 to rise, thereby driving the locking part 130 to rise through the connecting plate 132. After the locking part 130 rises, it can release the locking effect on the positioning block 110 and release the rigid locking of the positioning block 110.

[0056] Furthermore, in order to achieve unlocking of the guardrail 210 at a high position, two first grooves 141a and two second grooves 141b are arranged opposite to each other on the top of the positioning seat 141. The depth of the first groove 141a is greater than the depth of the second groove 141b. A limit block 144a is provided at the bottom of the lifting portion 144. The limit block 144a can be inserted into the first groove 141a or the second groove 141b. When the limit block 144a is inserted into the second groove 141b, the height of the limit block 144a is increased, which will cause the height of the lifting portion 144 to be increased, and then the lower end of the locking member 130 can be separated from the accommodating groove 220, thereby achieving unlocking of the positioning block 110, that is, the guardrail 210 can be unlocked at high altitudes to meet different needs.

[0057] Furthermore, a buffer block 142 a is provided on the bottom end of the pin shaft 142 . The buffer block 142 a is made of elastic material, which can prevent the pin shaft 142 from rigidly impacting the base frame 300 and prevent the pin shaft 142 or the base frame 300 from being damaged.

[0058] A picking vehicle includes a base frame 300, a support frame 400, an operating platform 200, a pallet 500 and the above-mentioned guardrail locking mechanism 100. The support frame 400 is arranged in the middle of the base frame 300 in the vertical direction. The operating platform 200 is arranged on one side of the support frame 400 in a liftable manner and is provided with a guardrail 210. The pallet 500 is arranged on the other side of the support frame 400 in a liftable manner and is used for placing goods. The guardrail 210 locking mechanism 100 is arranged on the operating platform 200 and is connected to the guardrail 210 for locking or unlocking the guardrail 210.

[0059] The working principle of the guardrail locking mechanism 100 in this embodiment is as follows:

[0060] When the picking vehicle is in normal operation, the guardrail 210 is in a protective state. At this time, the positioning block 110 is in the first extreme position, one side of the positioning protrusion 111 abuts against the first side wall of the positioning groove 221, the lower end of the insert block 131 of the locking member 130 is inserted into the positioning groove 221 in the accommodating groove 220, and the locking plane 131a of the insert block 131 abuts against the side of the positioning protrusion 111 away from the first side wall, thereby locking the positioning block 110 and preventing the guardrail 210 from accidentally rotating and retracting.

[0061] When the operating platform 200 needs to be lowered to the vicinity of the base frame 300, the operating platform 200 is lowered to the first preset height, and the buffer block 142a at the lower end of the pin shaft 142 of the unlocking member 140 abuts against the base frame 300. As the operating platform 200 continues to descend, the pin shaft 142 moves upward relative to the operating platform 200, driving the pulling portion 144 to move upward. The pulling portion 144 drives the inserting block 131 of the locking member 130 to move upward through the retaining ring and the connecting plate 132, so that the inserting block 131 is disengaged from the positioning groove 221 in the accommodating groove 220, thereby unlocking the positioning block 110. At this time, the operator can manually rotate the guardrail 210 to change the guardrail 210 from the protective state to the retracted state. The positioning block 110 also rotates from the first limit position to the second limit position, and the other side of the positioning block 110 abuts against the second side wall of the positioning groove 221.

[0062] When the guardrail 210 needs to be restored to the protective state from the retracted state, the operator manually rotates the guardrail 210, and the positioning block 110 rotates from the second limit position to the first limit position. During the rotation process, the positioning block 110 passes the dead center position. At this time, the hinge point of the positioning protrusion 111 and the first connecting column 240, the connection point of the positioning block 110 and the guardrail 210, and the hinge point of the positioning protrusion 111 and the second connecting column 112 are all located on the same straight line. When the positioning block 110 rotates past the dead center position, the positioning spring 120 drives the positioning block 110 to continue to rotate to the first limit position and abut against the first side wall. At this time, under the action of the downward spring, the locking member 130 moves down and inserts the insertion block 131 into the positioning groove 221, and the locking plane 131a abuts against the side of the positioning protrusion 111 away from the first side wall, thereby locking the positioning block 110 and stabilizing the guardrail 210 in the protective state.

[0063] When the guardrail 210 needs to be manually unlocked, the limit block 144a on the lifting portion 144 can be switched from the first groove 141a to the second groove 141b. At this time, the insert block 131 of the locking member 130 moves up and disengages from the accommodating groove 220, thereby unlocking the positioning block 110 and allowing the guardrail 210 to rotate freely.

[0064] The technical solutions of the present invention have been described in detail above with reference to the accompanying drawings, and the embodiments described are intended to facilitate understanding of the concepts of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0065] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0066] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0068] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A guardrail locking mechanism, wherein the guardrail is rotatably arranged on the operating platform of a picking vehicle, the picking vehicle further comprising a chassis and a support frame arranged vertically on the chassis, the operating platform being liftably arranged on one side of the support frame, characterized in that: The locking mechanism comprises: a positioning block fixed to the bottom end of the guardrail and rotating synchronously therewith, the positioning block being arranged in the receiving groove of the operating platform, and the positioning block having a first extreme position and a second extreme position, when the positioning block is in the first extreme position, the guardrail is in a protective state, and when the positioning block is in the second extreme position, the guardrail is in a retracted state; a first elastic member connected to one end of the positioning block and used to drive the positioning block to move toward the first limit position or the second limit position; a locking member, which is movably disposed on the operating platform, and when the positioning block is located at the first limit position, the lower end of the locking member can be inserted into the receiving groove and can be in contact with one side of the positioning block to lock the positioning block; an unlocking member vertically extending through the operating platform, wherein the upper end of the unlocking member is connected to the locking member and the lower end of the unlocking member extends to the bottom of the operating platform; When the operating platform descends to a first preset height, the lower end of the unlocking member abuts against the base frame and moves upward, driving the locking member to disengage from the accommodating groove to unlock the positioning block.

2. The guardrail locking mechanism according to claim 1, characterized in that: A positioning protrusion is provided on the positioning block, a positioning groove is provided on the side wall of the accommodating groove, and a first side wall and a second side wall are provided in the positioning groove. When the positioning block is located at the first extreme position, one side of the positioning protrusion abuts against the first side wall, and when the positioning block is located at the second extreme position, the other side of the positioning protrusion abuts against the second side wall.

3. The guardrail locking mechanism according to claim 2, characterized in that: The locking member includes an insert block, the lower end of which can be inserted into the positioning groove, and the lower end of the insert block has a locking plane and a guide slope. When the positioning block is located at the first extreme position, the locking plane can abut against the side of the positioning protrusion away from the first side wall, and the guide slope is obliquely arranged between the first side wall and the second side wall, and inclined toward the first side wall.

4. The guardrail locking mechanism according to claim 3, characterized in that: The operating platform is provided with a support plate, and the support plate is provided with a plurality of adjustment holes in the vertical direction, wherein a positioning shaft is provided in one of the adjustment holes, and the insert block is provided with an adjustment slot arranged in the vertical direction, and the positioning shaft is movably inserted into the adjustment slot; The locking member also includes a pull-down spring, a lug plate is provided on one side of the upper end of the plug block, the lower end of the pull-down spring is connected to the operating platform, the upper end of the pull-down spring is connected to the lug plate, and the pull-down spring is in a stretched state.

5. The guardrail locking mechanism according to claim 2, characterized in that: The first elastic member includes a positioning spring, a first connecting column is provided at the bottom of the operating platform, a second connecting column is provided on the end of the positioning block close to the positioning protrusion, and the end of the positioning block away from the second connecting column is connected to the bottom end of the guardrail, and the two ends of the positioning spring are respectively rotatably connected to the first connecting column and the second connecting column.

6. The guardrail locking mechanism according to claim 5, characterized in that: The positioning block also has a dead point position. When the positioning block is at the dead point position, the hinge point between the positioning protrusion and the first connecting column, the connection point between the positioning block and the guardrail, and the hinge point between the positioning protrusion and the second connecting column are all located on the same straight line. The first limit position is located on the left side of the dead point position, and the second limit position is located on the right side of the dead point position.

7. The guardrail locking mechanism according to claim 1, characterized in that: The unlocking member includes a positioning seat, a pin shaft, a compression spring and a lifting part. The positioning seat is fixed on the operating platform, the pin shaft is passed through the positioning seat, the compression spring is sleeved on the outside of the pin shaft, and is used to provide a downward elastic force for the pin shaft. The lifting part is fixedly connected to the upper end of the pin shaft, and the upper end of the locking member is in contact with the top of the retaining ring on the side of the lifting part through a connecting plate.

8. The guardrail locking mechanism according to claim 7, characterized in that: The top of the positioning seat is provided with two first grooves arranged opposite to each other and two second grooves arranged opposite to each other. The depth of the first groove is greater than the depth of the second groove. The bottom of the lifting part is provided with a limit block, and the limit block can be inserted into the first groove or the second groove. When the limit block is inserted into the second groove, the lower end of the locking member can be separated from the accommodating groove.

9. The guardrail locking mechanism according to claim 7, characterized in that: A buffer block is provided on the bottom end of the pin shaft, and the buffer block is made of elastic material.

10. A picking vehicle, characterized in that: include: chassis; a support frame, which is arranged in the middle of the base frame in a vertical direction; An operating platform, which is escalably arranged on one side of the support frame and has a guardrail; a tray, which is liftably arranged on the other side of the support frame; The guardrail locking mechanism according to any one of claims 1 to 9 is arranged on the operating platform and connected to the guardrail.

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