Stop device and elevator having the same

Abstract

The present invention discloses a stop device and an elevator having the same. The stop device includes a fixed axis, a first rod, a second rod, a push rod, and a reset portion. The fixed axis is suspended above the lifting track. The first and second parts of the first rod are pivotally connected to the fixed axis at the connection point. The inner end of the second rod is pivotally connected to the upper end of the first rod, and the height of the inner end is always lower than the outer end. The lower end of the push rod is pivotally connected to the outer end. The push rod can move up and down and has an extended position and a retracted position: in the extended position, the push rod is extended, and the second part swings toward the inner side of the lifting track to stop the overhead crane; in the retracted position, the push rod is retracted, and the second part swings toward the outer side of the lifting track to release the overhead crane. The reset portion is suitable for returning the push rod upward to the extended position when unloaded. When the push rod is pressed downward, the reset portion elastically deforms and allows the push rod to move to the retracted position. The present invention does not require the additional provision of other drive structures to achieve the stopping and release of the overhead crane.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor transmission systems, and in particular to a stopping device and an elevator having the same. Background Art

[0002] During semiconductor processing, an overhead crane is required to transport wafer cassettes loaded with wafers between various process tools. To conserve floor space, the overhead crane typically travels along a suspended work track. To install the overhead crane on the work track, it must first be mounted on a lifting track formed by two parallel track segments. The lifting track and the overhead crane on the lifting track are then raised using an elevator. Once the lifting track is raised to the same height as the overhead crane's work track and docked, the overhead crane moves from the lifting track to the work track. However, during this process, if the lifting track tilts during elevation, the overhead crane can easily fall from the track. Summary of the Invention

[0003] One of the purposes of the present invention is to provide a stop device for stopping or releasing an overhead crane located on a lifting track, which comprises: a fixed axis, the fixed axis being suspended above the lifting track; a first rod body, the first rod body having a first part and a second part arranged up and down, the first part and the second part being pivotally connected to the fixed axis at a connection point; a second rod body, the second rod body having an inner end close to the inner side of the lifting track and an outer end away from the inner side of the lifting track, the inner end being pivotally connected to the upper end of the first part by a shaft, the height of the inner end being always lower than the outer end; a top rod, The push rod extends in the up and down directions, and the lower end of the push rod is pivotally connected to the outer end. The push rod can move up and down and has an extended position and a retracted position: in the extended position, the push rod extends upward, and the second part swings toward the inner side of the lifting track to stop the overhead crane; in the retracted position, the push rod retracts downward, and the second part swings toward the outer side of the lifting track to release the overhead crane; a reset part, the reset part is suitable for resetting the push rod upward to the extended position when the push rod is unloaded, and when the push rod is pressed downward, the reset part elastically deforms and allows the push rod to move to the retracted position.

[0004] Furthermore, the reset part includes a push seat and an elastic member 1, the push seat is used to reciprocate along the width direction of the lifting track, the push seat is pivotally connected to the inner end and the upper end of the first part through an axis rod, and an adjustment hole allowing the first rod body to swing is provided at the connection between the first part and the second part or the upper end of the first part, the elastic member 1 can act on the push seat in an elastically deformable manner, and when the elastic member 1 is in a natural state, the push seat moves to a position close to the top rod.

[0005] Furthermore, the adjustment hole has a first hole wall and a second hole wall, the projection of the first hole wall along the length direction of the first rod is d1, the projection of the second hole wall along the width direction of the first rod is d2, and d1≥d2.

[0006] Furthermore, there are two groups of the first rod body and the second rod body, and the two groups of the first rod body and the second rod body are symmetrically arranged on both sides of the push rod along the shaft, and the stop device also includes a limiting portion arranged at the end of the shaft, and the limiting portion protrudes from the cross section of the shaft and is located on the side of the adjustment hole away from the push seat.

[0007] Furthermore, the reset portion further includes at least one guide seat, and a guide rod slidably connected to any one of the guide seat and the push seat, and both ends of the elastic member are respectively connected to the guide seat and the push seat.

[0008] Furthermore, the reset portion includes a second elastic member for applying a force in an extending direction to the push rod. When the second elastic member is in a natural state, the push rod is in an extended position.

[0009] Furthermore, a stop block is provided at the lower end of the second part, which abuts against the wheel surface of the traveling wheel of the overhead crane. The stop block has a stop surface that can abut against the wheel surface of the traveling wheel, and the stop block can swing until the stop surface fits against the wheel surface of the traveling wheel.

[0010] Furthermore, the lower end of the second portion is located on a side close to the stop block and has an arc-shaped surface that gradually tilts away from the stop block.

[0011] Furthermore, the distance between the upper end of the first rod and the fixed axis is smaller than the distance between the lower end of the first rod and the fixed axis.

[0012] Furthermore, it also includes a slide seat arranged outside the push rod, the slide seat is provided with a slide groove arranged along the moving direction of the push rod, the outer end is connected to the push rod through a pin shaft, and the pin shaft can slide along the slide groove.

[0013] Furthermore, it also includes a bracket, which is arranged on the lifting track, and the push rod is arranged on the bracket and is located on a side away from the lifting track.

[0014] The present invention also provides an elevator, which includes the aforementioned stopping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the three-dimensional structure of a stop device according to an embodiment of the present invention when it is in a state of releasing the overhead crane and is not arranged on a bracket;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the stopping device according to one embodiment of the present invention when it is in a stopping state for the overhead travelling crane and is not arranged on the bracket;

[0017] Figure 3 This is a schematic structural diagram of a first rod body of a stopper device according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic structural diagram of the adjustment hole of the first rod body according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic structural diagram of a stop block of a stop device according to an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the three-dimensional structure of the positional relationship between the stop device and the lifting rail when the stop device is in the state of releasing the overhead crane according to one embodiment of the present invention;

[0021] Figure 7 This is a schematic three-dimensional structural diagram of the positional relationship between the stop device and the lifting rail when the stop device is in a stopping state for the overhead crane according to one embodiment of the present invention;

[0022] Figure 8 FIG2 is a schematic diagram of the three-dimensional structure of a stopper device according to an embodiment of the present invention when it is arranged on a bracket. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0024] In the prior art, the trigger position of the stop device is set close to the lifting rail 2. Even if the overhead crane 3 is raised to its proper position, another driving source must be used to apply force to the stop device to release the overhead crane 3. Therefore, on the one hand, the driving source needs to be installed on the top wall, which increases the installation difficulty. On the other hand, the need to install electrical circuits or gas circuits also increases the structural complexity and maintenance difficulty.

[0025] Example 1:

[0026] See attached Figure 1-8 As shown, this embodiment is a stop device, which rises and falls synchronously with the lifting track 2, and includes: a fixed axis 110 suspended above the lifting track 2, a first rod body 11, a second rod body 12, a push rod 13 and a reset part.

[0027] See attached Figure 3As shown, the first rod body 11 of this embodiment has a first portion 116 and a second portion 117 arranged vertically, and the connection between the first portion 116 and the second portion 117 is pivotally connected to the fixed shaft 110 .

[0028] The top rod 13 of the present invention is along the up and down direction ( Figure 2 The top rod 13 extends in the direction of the arrow A in the figure, the lower end of the top rod 13 is pivotally connected to the outer end 122 of the second rod body 12, and the top rod 13 can move up and down and has an extended position and a retracted position: in the extended position, the top rod 13 extends upward, and the second part 117 of the first rod body 11 swings toward the inner side of the lifting track 2 to stop the crown block 3; in the retracted position, the top rod 13 retracts downward, and the second part 117 swings toward the outer side of the lifting track 2 to release the crown block 3.

[0029] The second rod 12 of this embodiment has an inner end 121 close to the inner side of the lifting track 2 and an outer end 122 away from the inner side of the lifting track 2 (see Figure 1 ), the inner end 121 is pivotally connected to the upper end of the first part 116 through the shaft 14, and the height of the inner end 121 is always lower than the outer end 122.

[0030] The reset portion of this embodiment is suitable for restoring the push rod 13 upward to the extended position when the push rod 13 is unloaded. When the push rod 13 is pressed downward, the reset portion elastically deforms and allows the push rod 13 to move to the retracted position.

[0031] The working process of the stopper device of this embodiment is as follows: When the stopper device rises along with the lifting track 2, the top rod 13 is not pressed (see Figure 2 and Figure 7 ), the reset part extends the top rod 13 upward through the second rod 12, and at the same time, the second part 117 of the first rod 11 swings around the fixed axis 110 to the inner side of the lifting track 2. At this time, the overhead crane 3 can be stopped, thereby preventing the lifting track 2 from tilting when being lifted and causing the overhead crane 3 to slip and fall on the lifting track 2. As the overhead crane 3 is raised and lowered into place, the top rod 13 will naturally be pressed by other structures (such as the ceiling, installation keel, etc.) (see Figure 1 and Figure 6 ), at this time, the top rod 13 pushes the outer end 122 of the second rod body 12 to move downward. As the second rod body 12 moves downward, the second rod body 12 swings, and the angle between the cross section of the second rod body 12 and the axis of the top rod 13 gradually decreases. The inner end 121 of the second rod body 12 pushes the first part 116 of the first rod body 11 to move toward the inner side of the lifting track 2. The first rod body 11 swings around the fixed axis 110, and the second part 117 of the first rod body 11 swings toward the outer side of the lifting track 2 (see Figure 6 ), and can release overhead crane 3.

[0032] The first part 116 of the first rod body 11 is located above the second part 117 of the first rod body 11, and the connection between the first part 116 and the second part 117 is pivotally connected to the fixed shaft 110. The upper end of the first part 116 of the first rod body 11 is pivotally connected to the inner end 121 of the second rod body 12, and the outer end 122 of the second rod body 12 is higher than the inner end 121 of the second rod body 12. The outer end 122 of the second rod body 12 is pivotally connected to the push rod 13, so the push rod 13 can be pressed at a higher position above the lifting rail 2, and the distance required to press the push rod 13 is shorter. As the lifting rail 2 is raised into place, the higher push rod 13 is easily pushed by the ceiling or keel, etc., so there is no need to use a powered electric push rod or pneumatic push rod to extend a long distance to press the push rod 13, which saves time for unlocking the overhead crane 3.

[0033] By keeping the height of the inner end 121 of the second rod body 12 of this embodiment lower than the outer end 122 at all times, it is possible to ensure that when the overhead crane 3 needs to be released, after the push rod 13 is pushed downward, the first rod body 11 swings along with the second rod body 12, and the second portion 117 of the first rod body 11 always swings toward the outside of the lifting track 2, without interfering with the normal travel of the overhead crane 3.

[0034] The present invention utilizes a reset portion to constantly apply an upward force to the push rod 13, so that the push rod 13 is always in an extended position when not being pressed; and when a downward pressing force is applied to the push rod 13, the push rod 13 is in a retracted position. Thus, there is no need to set up other additional drive structures. It is only necessary for the stop device to rise to a certain height along with the overhead crane 3, and the external structure can naturally press the push rod 13 to retract it. After the overhead crane 3 is raised to its position, the push rod 13 can drive the second part 117 of the first rod body 11 to swing toward the outside of the lifting track 2 to release the overhead crane 3. Therefore, there is no need to set up a cylinder or an electric cylinder on the lifting track 2 to directly stop the overhead crane, so there is no need to consider the layout of the air pipe or cable, nor is there any need to consider the retraction and extension of the air pipe or cable when the lifting track 2 is raised, which simplifies the structure. The stop device of the present application automatically stops and releases the overhead crane during the lifting process of the lifting track 2, without the need for additional electrical control, and has high reliability.

[0035] The "suspension" of the present invention is to specify that the shaft 110 is non-contactly arranged above the lifting track 2. It is not strictly limited to being directly above the lifting track 2. It only needs to ensure that the height is higher than the lifting track 2. For example, it can be arranged above the overhead crane 3.

[0036] In some embodiments, the reset portion includes a push seat 15 and an elastic member 19. The push seat 15 is used to move back and forth along the width direction of the lifting track 2. The push seat 15 is pivotally connected to the inner end 121 and the upper end of the first part 116 through the shaft 14. An adjustment hole 111 is provided at the connection between the first part 116 and the second part 117 or at the upper end of the first part 116 to allow the first rod body 11 to swing. The elastic member 19 can act on the push seat 15 in an elastically deformable manner. When the elastic member 19 is in a natural state, the push seat 15 moves to a position close to the top rod 13.

[0037] When the push rod 13 is not pressed, the elastic member 19 is in a natural state, and the push seat 15 is pushed by the elastic member 19 to a position close to the push rod 13. The push seat 15 drives the first rod 11 and the second rod 12 through the shaft 14, so that the inner end 121 of the second rod 12 is located closest to the push rod 13. The push rod 13 is pushed upward by the second rod 12, and the first rod 11 swings around the fixed axis 110 so that the second part 117 stops the overhead crane 3 (see attached Figure 2 and Figure 7 When the second rod 12 is pushed downward, the outer end 122 of the second rod body 12 is pushed downward. When the second rod body 12 moves downward, the second rod body 12 swings, and the angle between the cross section of the second rod body 12 and the axis of the rod 13 gradually decreases. The inner end 121 of the second rod body 12 pushes the first part 116 of the first rod body 11 to move toward the inner side of the lifting rail 2 through the shaft rod 14. At the same time, the shaft rod 14 moves in the direction away from the rod 13 under the drive of the second rod body 12, and drives the push seat 15 to move in the direction away from the rod 13. The elastic member 19 is in a compressed state, and the first rod body 11 is driven by the shaft rod 14 to swing around the fixed axis 110, so that the second part 117 releases the crane 3. At this time, the push seat 15 is in a position away from the rod 13 (see attached Figure 1 ), the stop device is in the release state for the overhead crane 3.

[0038] See attached Figure 3 and attached Figure 4As shown, in some embodiments, the adjustment hole 111 has a first hole wall 1111 and a second hole wall 1112. The projection of the first hole wall 1111 along the length of the first rod 11 is d1, and the projection of the second hole wall 1112 along the width of the first rod 11 is d2, where d1 ≥ d2. Therefore, by providing the adjustment hole 111 and ensuring that d1 ≥ d2, when the overhead crane 3 is released, the shaft 14 moves away from the push rod 13, causing the first rod 11 connected to the shaft 14 to not only swing but also be pulled diagonally upward. When the overhead crane 3 is stopped, the push seat 15, under the action of the elastic member 19, causes the shaft 14 to move toward the push rod 13, causing the first rod 11 connected to the shaft 14 to not only swing but also be pushed diagonally downward. The adjustment hole 111 provides adjustment space along the length of the first rod 11 for relative movement between the first rod 11 and the shaft 14 or the fixed shaft 110.

[0039] In some embodiments, the end of the first hole wall 1111 away from the fixed axis 110 is inclined in a direction away from the push rod 13, and the end of the first hole wall 1111 close to the fixed axis 110 is inclined in a direction close to the push rod 13. In other possible embodiments, the first hole wall 1111 can also be arranged along the length direction of the first rod body 11, that is, the adjustment hole 111 can also be arranged in a non-inclined form.

[0040] In some embodiments, see Appendix Figure 3 As shown, the distance between the upper end of the first rod 11 and the fixed axis 110 is shorter than the distance between the lower end of the first rod 11 and the fixed axis 110. Therefore, even when the distance the push rod 13 is pushed is short, the second portion 117 of the first rod 11 can fully move between a position that stops the overhead crane 3 and a position that avoids the overhead crane 3. When the push stroke of the push rod 13 is shortened, the height dimension of the stop device is reduced, which helps to raise the lifting track 2 to a higher height when the roof height is limited. It also shortens the switching time from the stopping overhead crane to the releasing overhead crane, helping to improve the safety of the overhead crane 3 on the lifting track 2 during lifting.

[0041] In some embodiments, there are two groups of first rod bodies 11 and second rod bodies 12, and the two groups of first rod bodies 11 and second rod bodies 12 are symmetrically arranged on both sides of the top rod 13 along the shaft 14. The stop device also includes a limiting portion 141 arranged at the end of the shaft 14. The limiting portion 141 protrudes from the cross section of the shaft 14 and is located on the side of the adjustment hole 111 away from the push seat 15. When in use, the stop device can be located between the front and rear wheels of the overhead crane 3. When the overhead crane 3 slides toward either end of the lifting track 2, the side of the second portion 117 of the first rod body 11 away from the push seat 15 is pushed by the traveling wheel 31 of the overhead crane 3 or other structures of the overhead crane 3. The first rod body 11 transmits the thrust to the fixed shaft 110, and the first portion 116 of the first rod body 11, which has a tendency to swing away from the push seat 15, is limited by the limiting portion 141. At this time, the fixed shaft 110 forms a fulcrum area for the first rod body 11 to swing under the pressure of the traveling wheel 31. In this process, the maximum thrust is transmitted to the fixed shaft 110, and the shaft rod 14 is stopped by the limiting portion 141. The shaft rod 14 is mainly subjected to the tensile force, and the shaft rod 14 will not be damaged by pressure and bending moment.

[0042] The limiting portion 141 may be, for example, a nut threadedly connected to the shaft, or a protrusion riveted or welded into one piece with the shaft. This embodiment does not limit the type of the limiting portion 141 .

[0043] In some embodiments, the reset portion further includes at least one guide seat, and a guide rod 18 slidably connected to either the guide seat or the push seat 15 , and both ends of the elastic member 19 are connected to the guide seat and the push seat 15 respectively.

[0044] For example, the guide base includes a first guide base 16 and a second guide base 17, respectively located on either side of the push base 15. Opposite through-holes are provided on the first guide base 16 and the second guide base 17, through which a guide rod 18 enters and exits. The guide rod 18 is fixed to the push base 15 (the fixing method is not limited, for example, the push base 15 and the guide rod 18 can be provided with through-pin holes and fixed with pins). The guide rod 18 can reciprocate with the push base 15 within the first guide base 16 and the second guide base 17. The guide rod 18 serves to guide the movement direction of the shaft 14 connected to the push base 15.

[0045] Alternatively, the guide rod 18 may be fixed to the first guide seat 16 and the second guide seat 17 , and a seat hole for the guide rod 18 to pass through is provided on the push seat 15 so that the guide rod 18 slides in the seat hole of the push seat 15 .

[0046] In other possible embodiments, the push seat 15 can also achieve reciprocating movement in the width direction of the lifting track 2 through the guidance of the guide rail. In some embodiments, the elastic member 19 is a compression spring, which is connected to the second guide seat 17 and the push seat 15 respectively. When the push rod 13 is pressed, the second rod body 12 drives the push seat 15 to move toward the second guide seat 17, and the elastic member 19 is compressed; when the push rod 13 is not pressed, the elastic member 19 returns to its original position and applies a force to the push seat 15 in the direction of approaching the push rod 13, thereby causing the outer end 122 of the second rod body 12 to swing upward accordingly, and the push rod 13 is restored to the ejected state.

[0047] In other possible embodiments, the elastic member 19 is a tension spring disposed between the first guide seat 16 and the push seat 15. When the elastic member 19 is in its natural state, it drives the push seat 15 to always be located near the push rod 13, with the push rod 13 in an extended position. When the lifting rail is raised to its proper position and the overhead crane 3 needs to be released, the push rod 13 is pressed downward, which drives the outer end 122 of the second rod 12 downward, and drives the inner end 121 to swing away from the push rod 13, further driving the push seat 15 away from the tension spring. At this point, the tension spring of the elastic member 19 is in a stretched state. When the pressing force on the push rod 13 is no longer applied, the tension spring returns to its original position.

[0048] In some embodiments, see Appendix Figure 5 As shown, a stop block 112 is also provided at the lower end of the second part 117, which abuts against the wheel surface of the traveling wheel 31 of the overhead crane 3. The stop block 112 has a stop surface 1121 that can abut against the wheel surface of the traveling wheel 31. The stop block 112 can swing until the stop surface 1121 fits with the wheel surface of the traveling wheel 31.

[0049] A clamping block 1122 is provided on one side of the stop block 112 close to the first rod 11, and a limiting groove 118 is provided on the first rod 11 to cooperate with the clamping block 1122. The limiting groove 118 cooperates with the clamping block 1122 to prevent the stop block 112 from rotating and ensure stability during stopping.

[0050] When the first rod body 11 is located at the stopping position, the contact surface of the abutting portion of the stopping block 112 is inclined toward the direction of the traveling wheel 31 .

[0051] In some embodiments, the lower end of the second portion 117 of the first rod 11 is located near the stop block 112 and has an arcuate surface 119 that gradually tilts away from the stop block 112 (see Figure 2As shown). Therefore, the gap formed between the stop block 112 and the first rod body 11 allows the stop block 112 to swing along the arc surface 119 to a certain extent when contacting the running wheel 31. As a result, the contact surface of the stop block 112 can fit the wheel surface of the upper half of the running wheel 31, which can effectively stop the running wheel 31.

[0052] In some embodiments, a slide 113 is further included on the outside of the push rod 13, and the slide 113 is provided with a slide groove 1131 arranged along the moving direction of the push rod 13. The outer end 122 of the second rod body 12 is connected to the push rod 13 through a pin shaft, and the pin shaft can slide along the slide groove 1131.

[0053] In some embodiments, the stopper further includes a bracket 114 (see Figure 8 ), the bracket 114 is arranged on the lifting track 2, and the top rod 13 is arranged on the bracket 114 and is located on the side away from the lifting track 2. The present application installs the stop device on the bracket 114 connected to the lifting track 2, so that the stop device can be easily installed on the ground without having to operate in the air, thereby reducing the workload of personnel.

[0054] In some embodiments, the bracket 114 is C-shaped on a plane extending perpendicular to the lifting rail 2 , so that after the bracket 114 is connected to the two rails, the overhead travelling vehicle 3 can pass through easily.

[0055] In some embodiments, the stop device further includes a mounting plate 115 , the slide 113 , the first guide seat 16 and the second guide seat 17 are all arranged on one side surface of the mounting plate 115 , and the fixed shaft 110 is arranged on the other side surface of the mounting plate 115 through a bearing seat.

[0056] Example 2:

[0057] This embodiment is a stop device, which differs from the first embodiment in that the push seat 15 and the guide seat are no longer provided, and the reset portion is replaced by an elastic member 2 for applying an extension direction force to the push rod 13. When the elastic member 2 is in a natural state, the push rod 13 is in an extended position.

[0058] In some embodiments, the second elastic member can be a spring disposed at the lower end of the push rod 13, with its axis arranged along the central axis of the push rod 13. When the push rod 13 is not subjected to downward pressure, the spring is in a natural state (only slightly compressed by the gravity of the push rod 13); when downward pressure is applied to the push rod 13, the spring is compressed, and the outer end 122 of the second rod body 12 swings downward with the push rod 13. However, the height of the inner end 121 is always lower than the height of the outer end 122. The first rod body 11 rotates about the fixed axis 110 along with the second rod body 12, and its second portion 117 swings away from the overhead crane 3, thereby releasing the overhead crane 3.

[0059] Example 3:

[0060] This embodiment is an elevator, which includes at least one stop device of the first embodiment or at least one stop device of the second embodiment.

[0061] The above embodiments are only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stopper device that rises and falls synchronously with the lifting track, characterized in that: include: A fixed shaft, the fixed shaft being suspended above the lifting track; a first rod body, the first rod body comprising a first portion and a second portion arranged vertically, wherein a connection between the first portion and the second portion is pivotally connected to the fixed axis; a second rod body, the second rod body having an inner end close to the inner side of the lifting track and an outer end away from the inner side of the lifting track, the inner end being pivotally connected to the upper end of the first portion via a shaft, and the inner end being always lower than the outer end; A push rod, the push rod extending in the up-down direction, the push rod being pivotally connected to the outer end, the push rod being movable up and down and having an extended position and a retracted position: in the extended position, the push rod is extended upward, and the second portion swings toward the inner side of the lifting track to stop the overhead travelling vehicle; in the retracted position, the push rod is retracted downward, and the second portion swings toward the outer side of the lifting track to release the overhead travelling vehicle; A reset portion adapted to reset the ejector rod upward to the extended position when the ejector rod is unloaded, and to elastically deform the reset portion to allow the ejector rod to move to the retracted position when the ejector rod is pressed downward. The reset portion includes a push seat and an elastic member 1. The push seat is used to reciprocate along the width direction of the lifting track. The push seat is pivotally connected to the inner end and the upper end of the first part through the shaft. The elastic member 1 can act on the push seat in an elastically deformable manner. When the elastic member 1 is in a natural state, the push seat moves to a position close to the top rod.

2. The stopper device according to claim 1, characterized in that: An adjustment hole for allowing the first rod to swing is provided at the connection between the first part and the second part or at the upper end of the first part.

3. The stopper device according to claim 2, characterized in that: The adjustment hole has a first hole wall and a second hole wall. The projection of the first hole wall along the length direction of the first rod body is d1, and the projection of the second hole wall along the width direction of the first rod body is d2. d1≥d2.

4. The stopper device according to claim 2, characterized in that: There are two groups of the first rod body and the second rod body, and the two groups of the first rod body and the second rod body are symmetrically arranged on both sides of the push rod along the shaft. The stop device also includes a limiting portion arranged at the end of the shaft, and the limiting portion protrudes from the cross section of the shaft and is located on the side of the adjustment hole away from the push seat.

5. The stopping device according to any one of claims 2 to 4, characterized in that: The reset portion further includes at least one guide seat and a guide rod slidably connected to any one of the guide seat and the push seat. Both ends of the elastic member are respectively connected to the guide seat and the push seat.

6. The stopping device according to claim 1, characterized in that: The reset portion includes a second elastic member for applying a force in an extending direction to the push rod. When the second elastic member is in a natural state, the push rod is in an extended position.

7. The stopping device according to any one of claims 1 to 4 and 6, characterized in that: A stop block is also provided at the lower end of the second part, which abuts against the wheel surface of the traveling wheel of the overhead crane. The stop block has a stop surface that can abut against the wheel surface of the traveling wheel, and the stop block can swing until the stop surface fits with the wheel surface of the traveling wheel.

8. The stopper device according to claim 7, characterized in that: The lower end of the second portion is located on a side close to the stop block and has an arc-shaped surface that gradually tilts away from the stop block.

9. The stopping device according to any one of claims 1-4, 6 and 8, characterized in that: The distance between the upper end of the first rod and the fixed axis is smaller than the distance between the lower end of the first rod and the fixed axis.

10. A lift, characterized in that: The invention comprises the stopping device according to any one of claims 1 to 9.

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