Hole protection device and scissor lift

Abstract

The application relates to the technical field of aerial work equipment, and provides a pit protection device and a scissor lift truck. The pit protection device comprises two groups of pit protection units. Each pit protection unit comprises a compression shaft guide cylinder, a buffer compression shaft rod, a dustproof piece, a protection plate and a transmission assembly. The compression shaft guide cylinder is installed on a chassis vertical plate of the scissor lift truck. The buffer compression shaft rod is located in the compression shaft guide cylinder and moves along the axial direction of the compression shaft guide cylinder. The buffer compression shaft rod is configured to pass through an opening on the chassis bottom plate and abut against a fork frame of the scissor lift truck. The dustproof piece is arranged between the buffer compression shaft rod and the opening, and the buffer compression shaft rod is arranged in the center hole of the dustproof piece. One end of the transmission assembly abuts against the bottom end of the compression shaft rod, and the other end of the transmission assembly is rotationally connected with the protection plate. Through the above arrangement, the probability of dust or sundries entering the compression shaft guide cylinder can be reduced, so that the failure rate of compression shaft jamming can be reduced.

Description

Technical Field

[0001] This application relates to the field of aerial work platform technology, and in particular to a pothole protection device and a scissor lift. Background Technology

[0002] In the field of aerial work, scissor lifts, as equipment capable of carrying personnel at heights, are widely used in various locations. Existing scissor lifts typically ensure safety during aerial operations by incorporating pit protection structures. For example, if a wheel falls into a mud pit, the pit protection panels on both sides can provide some support, preventing the entire vehicle from tipping over.

[0003] Existing pit protection structures typically employ a multi-level nested structure for the pressure shaft assembly. The pressure shaft rod and spring are press-fitted together within the pressure shaft sleeve to form the pressure shaft assembly. The up-and-down movement of the pressure shaft assembly within the pressure shaft guide sleeve accommodates the opening and closing adjustment of the protection plate. However, this structure is not only complex to assemble, but also results in a large gap between the pressure shaft rod and the circular hole on the chassis when the forklift is lowered. When operating on soft ground, mud, dust, and other debris can easily enter the guide component (pressure shaft guide sleeve) through this gap, causing the pressure shaft rod to jam and ultimately leading to the failure of the pit protection mechanism. Utility Model Content

[0004] This application provides a pothole protection device and a scissor lift to solve the problem of pressure shaft jamming caused by dust easily entering the pressure shaft guide cylinder in existing pothole protection structures.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] The first aspect of this application provides a pothole protection device, comprising two sets of pothole protection units. Each pothole protection unit includes: a pressure shaft guide cylinder, which is mounted on the chassis upright plate of a scissor lift; a buffer pressure shaft rod, which is located inside the pressure shaft guide cylinder and moves axially along the pressure shaft guide cylinder; the buffer pressure shaft rod is configured to pass through an opening in the chassis bottom plate and abut against the fork of the scissor lift; a dustproof component, which is disposed between the buffer pressure shaft rod and the opening, and the buffer pressure shaft rod passes through the central hole of the dustproof component; a protection plate and a transmission assembly, one end of the transmission assembly abutting against the bottom end of the pressure shaft rod, and the other end of the transmission assembly being rotatably connected to the protection plate.

[0007] As an optional implementation, the end of the dustproof component away from the pressure shaft guide cylinder protrudes from the surface of the chassis bottom plate.

[0008] As an optional implementation, the distance between the top of the dustproof component and the chassis bottom plate is greater than or equal to 5mm and less than or equal to 10mm.

[0009] As an optional implementation, a groove is provided circumferentially on the side wall of the dustproof component, and the dustproof component is secured to the opening through the groove.

[0010] As an alternative implementation, the buffer pressure rod includes a pressure rod body and a buffer layer disposed at the top of the pressure rod body, wherein the buffer layer is adapted to contact the fork.

[0011] As an optional implementation, one of the pressure shaft and the buffer layer is provided with a mating hole, and the other is provided with a protrusion, which is embedded in the mating hole.

[0012] As an optional implementation, the size of the protrusion is larger than the size of the mating hole, so that the outer wall of the protrusion fits against the inner wall of the mating hole.

[0013] As an alternative implementation, the material of the buffer layer includes one of rubber, polyethylene, and polyurethane.

[0014] As an alternative implementation, the buffer layer covers the entire top wall of the pressure shaft.

[0015] A second aspect of this application provides a scissor lift including any of the aforementioned pothole protection devices.

[0016] The pothole protection device and scissor lift provided in this application include two sets of pothole protection units. Each pothole protection unit includes a pressure shaft guide cylinder, a buffer pressure shaft rod, a dustproof component, a protective plate, and a transmission assembly. The pressure shaft guide cylinder is installed on the chassis upright plate of the scissor lift. The buffer pressure shaft rod is located inside the pressure shaft guide cylinder and moves axially along the pressure shaft guide cylinder. The buffer pressure shaft rod is configured to pass through an opening in the chassis bottom plate and abut against the forks of the scissor lift. The dustproof component is disposed between the buffer pressure shaft rod and the opening, with the buffer pressure shaft rod passing through the central hole of the dustproof component. One end of the transmission assembly abuts against the bottom end of the pressure shaft rod, and the other end of the transmission assembly is rotatably connected to the protective plate.

[0017] With the above settings, since the pressure shaft sleeve is eliminated, the buffer pressure shaft rod can move axially under the guidance of the pressure shaft guide cylinder, thereby increasing the diameter of the buffer pressure shaft rod. Correspondingly, when the fork falls, the gap between the buffer pressure shaft rod and the opening on the chassis becomes smaller, making it less likely for dust and mud to fall into the pressure shaft guide cylinder through the gap between the buffer pressure shaft rod and the chassis, causing the pressure shaft to jam.

[0018] Furthermore, this application adds a dustproof component between the buffer pressure shaft rod and the opening. The buffer pressure shaft rod can pass through the central hole of the dustproof component to achieve contact with the fork. Because the dustproof component has a certain wall thickness, the gap through which dust can pass is further reduced. At this point, dust can only fall into the pressure shaft guide cylinder through the gap between the central hole of the dustproof component and the buffer pressure shaft rod, thereby significantly reducing the possibility of dust or debris entering the pressure shaft guide cylinder and reducing the failure rate of pressure shaft jamming. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A cross-sectional view of a pit protection structure in the prior art;

[0021] Figure 2 This is a diagram showing the positional relationship between the pressure rod and the circular hole in the prior art when the fork falls;

[0022] Figure 3 A perspective structural diagram of the pothole protection device provided in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram illustrating the connection between the buffer pressure shaft and the chassis bottom plate provided in an embodiment of this application.

[0024] Figure 5 This is a cross-sectional structural schematic diagram of the pothole protection device provided in the embodiments of this application;

[0025] Figure 6 This is a diagram showing the positional relationship between the buffer pressure rod and the opening when the fork falls, as provided in the embodiments of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10-Pit protection structure; 11-Pressure shaft rod; 12-Inner bushing; 13-Spring; 14-Pressure shaft sleeve; 15-Guide component; 16-Round hole;

[0028] 100 - Pothole protection device; 101 - Pothole protection unit;

[0029] 110 - Pressure shaft guide cylinder; 110a - Left pressure shaft guide cylinder; 110b - Right pressure shaft guide cylinder;

[0030] 120 - Buffer pressure rod; 120a - Left buffer pressure rod; 120b - Right buffer pressure rod;

[0031] 121-Pressure shaft body; 1211-Matching hole; 122-Buffer layer; 1221-Protrusion;

[0032] 130 - Dustproof part; 131 - Center hole; 132 - Groove;

[0033] 140 - Protection plate; 140a - Left protection plate; 140b - Right protection plate;

[0034] 150 - Transmission assembly; 150a - Left transmission assembly; 150b - Right transmission assembly; 151 - Rotating rod; 152 - Pull rod;

[0035] 160 - Guide sleeve; 160a - Left guide sleeve; 160b - Right guide sleeve;

[0036] 170 - Connecting plate; 171 - Fixing component; 172 - Connecting rod;

[0037] 180 - Drive unit; 180a - Left drive unit; 180b - Right drive unit;

[0038] 210 - Chassis upright plate; 220 - Chassis bottom plate; 221 - Opening. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] In the field of aerial work, aerial work platforms, as a type of equipment for carrying personnel at height, are widely used in various locations. Existing scissor lifts typically ensure safety during aerial work by incorporating pit protection structures. For example, if a wheel falls into a mud pit, the pit protection panels on both sides can provide some support, preventing the entire vehicle from tipping over.

[0041] In existing technologies, the pressure shaft assembly of a pit protection structure is typically designed as a multi-level nested structure. The pressure shaft rod and spring are pressed together into the pressure shaft sleeve to form a pressure shaft assembly. The up-and-down movement of the pressure shaft assembly within the pressure shaft guide sleeve adapts to the opening and closing adjustment of the protection plate. (Refer to...) Figure 1As shown, the pressure shaft assembly in the pit protection structure 10 can move up and down along the axial direction of the guide member 15. The pressure shaft assembly includes a pressure shaft rod 11, an inner bushing 12, a spring 13, and a pressure shaft sleeve 14. When assembling the pressure shaft assembly, the spring 13 is first placed into the pressure shaft sleeve 14, then the pressure shaft rod 11 is placed in, and finally, the inner bushing 12 is pressed in using a pressing device to form the pressure shaft assembly. The pressure shaft assembly is then installed inside the guide member 15.

[0042] However, the above method results in a complex structure and cumbersome multi-stage assembly process, leading to increased manufacturing costs. Furthermore, the assembly process is prone to component failure due to operational errors. And, referring to... Figure 2 As shown, when the fork (not shown in the figure) falls, the gap between the pressure rod 11 and the round hole 16 on the chassis is too large. When working on soft ground, mud, sand, dust and other debris can easily enter the guide 15 through the gap, causing the pressure rod 11 to get stuck, which in turn causes the pit protection mechanism 10 to fail.

[0043] In view of this, this application provides a pothole protection device and a scissor lift. The pothole protection device includes two sets of pothole protection units. Each pothole protection unit includes a pressure shaft guide cylinder, a buffer pressure shaft rod, a dustproof component, a protective plate, and a transmission assembly. The pressure shaft guide cylinder is installed on the chassis upright plate of the scissor lift. The buffer pressure shaft rod is located inside the pressure shaft guide cylinder and moves axially along the pressure shaft guide cylinder. The buffer pressure shaft rod is configured to pass through an opening in the chassis bottom plate and abut against the forks of the scissor lift. The dustproof component is disposed between the buffer pressure shaft rod and the opening, with the buffer pressure shaft rod passing through the central hole of the dustproof component. One end of the transmission assembly abuts against the bottom end of the pressure shaft rod, and the other end of the transmission assembly is rotatably connected to the protective plate.

[0044] With the above settings, since the pressure shaft sleeve is eliminated, the buffer pressure shaft rod can move axially under the guidance of the pressure shaft guide cylinder, thereby increasing the diameter of the buffer pressure shaft rod. Correspondingly, when the fork falls, the gap between the buffer pressure shaft rod and the opening on the chassis becomes smaller, making it less likely for dust and mud to fall into the pressure shaft guide cylinder through the gap between the buffer pressure shaft rod and the chassis, causing the pressure shaft to jam.

[0045] Furthermore, this application adds a dustproof component between the buffer pressure shaft rod and the opening. The buffer pressure shaft rod can pass through the central hole of the dustproof component to achieve contact with the fork. Because the dustproof component has a certain wall thickness, the gap through which dust can pass is further reduced. At this point, dust can only fall into the pressure shaft guide cylinder through the gap between the central hole of the dustproof component and the buffer pressure shaft rod, thereby significantly reducing the possibility of dust or debris entering the pressure shaft guide cylinder and reducing the failure rate of pressure shaft jamming.

[0046] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0047] Figure 3 A three-dimensional structural diagram of the pothole protection device provided in the embodiments of this application from one perspective. Figure 4 This is a schematic diagram showing the connection between the buffer pressure shaft and the chassis bottom plate provided in an embodiment of this application. Figure 5 This is a cross-sectional structural diagram of the pothole protection device provided in an embodiment of this application. It should be noted that... Figure 4 The transmission components are not shown.

[0048] Reference Figures 3 to 5 As shown, this application embodiment provides a pothole protection device 100, which includes two sets of pothole protection units 101. Each set of pothole protection units 101 may include a pressure shaft guide cylinder 110, a buffer pressure shaft rod 120, a protection plate 140, and a transmission assembly 150.

[0049] The pressure shaft guide cylinder 110 is mounted on the chassis upright plate 210 of the scissor lift. The buffer pressure shaft rod 120 is located inside the pressure shaft guide cylinder 110 and can move axially along the pressure shaft guide cylinder 110. Furthermore, the buffer pressure shaft rod 120 is configured to pass through an opening 221 on the chassis bottom plate 220 and abut against the forks of the scissor lift (not shown in the figure). One end of the transmission assembly 150 abuts against the bottom end of the pressure shaft rod, and the other end of the transmission assembly 150 is rotatably connected to the protective plate 140.

[0050] In this way, when the fork falls, the buffer pressure rod 120 can move downward along the axial direction of the pressure rod guide cylinder 110, and drive the corresponding protective plate 140 to rotate to the retracted state through the transmission component 150 that abuts against it, so as to avoid affecting the normal movement of the scissor lift.

[0051] For example, with Figure 3 and Figure 5 Taking the paper orientation as an example, the pit protection unit 101 located on the left side may include a left pressure shaft guide cylinder 110a, a left buffer pressure shaft rod 120a, a left transmission assembly 150a, and a left protective plate 140a. When the fork falls, the fork abuts against the left buffer pressure shaft rod 120a and drives the left buffer pressure shaft rod 120a to move downward along the left pressure shaft guide cylinder 110a. At this time, the left transmission assembly 150a can drive the left protective plate 140a to rotate under the action of the left buffer pressure shaft rod 120a, and finally make the left protective plate 140a return to the stored state, that is, the left protective plate 140a is set parallel to the ground.

[0052] Similarly, the pit protection unit 101 located on the right side may include a right pressure shaft guide cylinder 110b, a right buffer pressure shaft rod 120b, a right transmission assembly 150b, and a right protective plate 140b. When the fork falls, the fork will simultaneously abut against the right buffer pressure shaft rod 120b, driving the right buffer pressure shaft rod 120b to move downward along the right pressure shaft guide cylinder 110b. At this time, the right transmission assembly 150b can drive the right protective plate 140b to rotate under the action of the right buffer pressure shaft rod 120b, and finally return the right protective plate 140b to its retracted state, that is, the right protective plate 140b is set parallel to the ground.

[0053] It should be noted that the buffer pressure bar 120 can buffer and absorb the impact force when the fork carriage descends, so as to prevent damage to the buffer pressure bar 120 due to a hard collision with the fork carriage. For example, the buffer pressure bar 120 can be designed as an integral elastic bar or rubber bar, or the surface of the buffer pressure bar 120 in contact with the fork carriage can be made of a material with certain cushioning properties, or a buffer element can be added to the top of the pressure bar. No specific limitation is made here.

[0054] With the above configuration, a pressure sleeve of a certain thickness is no longer needed between the buffer pressure rod 120 and the pressure guide cylinder 110. The buffer pressure rod 120 can move axially directly under the guidance of the pressure guide cylinder 110 and pass through the opening 221 to contact the fork. Thus, without changing the size of the opening 221, the diameter of the buffer pressure rod 120 can be increased accordingly, reducing the gap between the buffer pressure rod 120 and the opening 221. At this time, when the fork falls, the gap between the buffer pressure rod 120 and the chassis also decreases. Large particles of dust and sand are less likely to fall into the pressure guide cylinder 110 through this gap, thereby reducing the risk of pressure rod jamming caused by dust and debris falling into the pressure guide cylinder 110.

[0055] Furthermore, as the diameter of the buffer pressure rod 120 increases, the stiffness and strength of the buffer pressure rod 120 also increase, thereby improving the reliability of the pit protection device 100.

[0056] Figure 6 This is a diagram showing the positional relationship between the buffer pressure rod and the opening when the fork falls, as provided in the embodiments of this application.

[0057] Combination Figures 4 to 6 As shown, each set of pit protection units 101 may also include a dustproof component 130. The dustproof component 130 is disposed between the buffer pressure rod 120 and the opening 221, and the buffer pressure rod 120 can pass through the central hole 131 of the dustproof component 130.

[0058] Understandably, because a dustproof component 130 is provided between the opening 221 and the buffer pressure rod 120, the buffer pressure rod 120 passes through the central hole 131 of the dustproof component 130 to achieve contact with the fork.

[0059] Since the dustproof component 130 has a certain wall thickness, the gap through which dust or sand can pass is the gap between the buffer pressure rod 120 and the central hole 131. Compared to the gap between the opening 221 and the buffer pressure rod 120, the gap through which dust can pass is further reduced. This significantly reduces the possibility of dust or debris entering the pressure rod guide cylinder 110, further reducing jamming failures caused by foreign matter accumulation and improving equipment operational reliability.

[0060] Continue to refer to Figure 6 As shown, in one embodiment, the end of the dustproof component 130 away from the pressure shaft guide cylinder 110 protrudes from the surface of the chassis bottom plate 220.

[0061] In this way, the end of the dustproof component 130 away from the pressure shaft guide cylinder 110 will be higher than the surface of the chassis base plate 220. When dust or mud falls on the surface of the chassis base plate 220, it will be blocked by the dustproof component 130 due to the height difference between the plane where the dust or mud is located and the plane where the opening side of the central hole 131 is located. Therefore, it cannot fall directly into the pressure shaft guide cylinder 110 through the gap between the buffer pressure shaft rod 120 and the central hole 131, which can further reduce the probability of failure caused by pressure shaft jamming.

[0062] For example, the distance between the top of the dustproof component 130 (the end away from the pressure shaft guide cylinder 110) and the chassis bottom plate 220 is greater than or equal to 5 mm and less than or equal to 10 mm.

[0063] For example, the distance between the top of the dustproof component 130 and the chassis base plate 220 can be 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, or any combination thereof.

[0064] This design can be adapted to most application scenarios and achieve cost control while providing a certain degree of dustproof effect.

[0065] In one implementation, the dustproof component 130 is detachably connected to the chassis base plate 220. For example, the dustproof ring can be fixed to the chassis base plate 220 by snap-fit ​​or by the engagement of screw holes. In this way, when the dustproof ring is contaminated with dust or dirt or is damaged, it can be replaced at any time to avoid affecting the dustproof performance of the pothole protection device 100.

[0066] To reduce assembly steps and the number of parts, a groove 132 is provided on the side wall of the dustproof part 130 along the circumferential direction, and the dustproof part 130 can be locked in the opening 221 through the groove 132.

[0067] In this way, the dustproof component 130 can form an "I"-shaped structure and snap onto the opening 221, thereby achieving a detachable connection with the chassis base plate 220 at the opening 221. Furthermore, no additional parts are required to achieve the assembly connection between the two, resulting in a simple structure and convenient assembly and disassembly.

[0068] Understandably, under the action of gravity, the side wall of the groove 132 away from the pressure shaft guide cylinder 110 is tightly attached to the surface of the chassis bottom plate 220 away from the pressure shaft guide cylinder 110, which can prevent dust from falling into the pressure shaft guide cylinder 110 from the gap.

[0069] It should be noted that the dustproof component 130 can be a rubber sealing ring. Furthermore, a small gap remains between the dustproof component 130 and the buffer pressure rod 120 to allow the pressure rod guide cylinder 110 to pass smoothly through the central hole 131 without jamming. At this point, the gap between the dustproof component 130 and the buffer pressure rod 120 can be controlled at 1-2 mm, thereby isolating most dust and dirt.

[0070] The following provides a detailed description of the specific structure of the buffer pressure rod 120 and various possible implementation methods.

[0071] Continue to refer to Figure 5 As shown, the buffer pressure rod 120 includes a pressure rod body 121 and a buffer layer 122 disposed at the top of the pressure rod body 121, wherein the buffer layer 122 is adapted to contact the fork.

[0072] In this way, the buffer pressure rod 120 can absorb the impact force when the fork descends through the buffer layer 122. Furthermore, the pressure rod body 121 can still maintain a certain rigidity, thereby improving the reliability of the entire pit protection device 100. Moreover, compared to the existing technology that uses springs for shock absorption, this eliminates the need for multi-stage assembly processes, reducing assembly steps and manufacturing costs.

[0073] It should be noted that the buffer layer 122 can also be fixedly connected to the pressure rod 121 by means of connectors (such as screws or pins), or it can be connected to the pressure rod 121 by means of snap-fit ​​or adhesive. No limitation is made here.

[0074] In some embodiments, the material of the buffer layer 122 may include one of rubber, polyethylene, and polyurethane. This ensures that the buffer layer 122 has a certain shock absorption and cushioning function.

[0075] For example, the material of the buffer layer 122 can be natural rubber (NR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), ethylene propylene diene monomer (EPDM), or silicone rubber.

[0076] Alternatively, the material of the buffer layer 122 can also be high molecular weight polyethylene (PE), ultra-high molecular weight polyethylene (UHMWPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE).

[0077] Alternatively, the material of the buffer layer 122 can also be polyurethane foam, such as flexible polyurethane foam, semi-rigid polyurethane foam, or rigid polyurethane foam. Or it can be a polyurethane elastomer, such as cast polyurethane elastomer or thermoplastic polyurethane elastomer.

[0078] For example, the buffer layer 122 can be made of high molecular weight polyethylene material, which not only buffers the impact force of the forklift, but is also durable, wear-resistant, and requires low maintenance. Furthermore, its aging resistance and corrosion resistance make it suitable for harsh environments.

[0079] Understandably, compared to the spring-based shock absorption solutions used in existing technologies, the buffer layer 122 design using the aforementioned material has elastic properties that can adapt to the impact requirements under different working conditions, extending the service life of the device and reducing maintenance frequency. In contrast, the stiffness of springs is fixed, making it difficult to adapt to the dynamic impact requirements under different working conditions, and after long-term use, fatigue deformation can reduce the buffering effect.

[0080] In some embodiments, the buffer layer 122 may cover the entire top wall of the pressure rod 121. Compared to covering only a portion of the top surface of the pressure rod 121, this arrangement ensures that the fork does not come into direct contact with the hard material surface (such as alloy or metal) of the pressure rod 121, thereby reducing the risk of cracking or damage to the pressure rod 121 due to impact.

[0081] In one embodiment, one of the pressure rod body 121 and the buffer layer 122 may be provided with a mating hole 1211, and the other is provided with a protrusion 1221, which is embedded in the mating hole 1211.

[0082] For example, such as Figure 5 As shown, the top end of the pressure shaft 121 may have a mating hole 1211, and the buffer layer 122 has a protrusion 1221, which can be embedded in the mating hole 1211. Specifically, the buffer layer 122 may be T-shaped.

[0083] In this way, since the buffer layer 122 mainly bears the downward impact force applied by the fork, the relative displacement of the buffer layer 122 relative to the pressure rod 121 on the horizontal plane can be limited by the cooperation between the protrusion 1221 of the buffer layer 122 and the mating hole 1211 at the top of the pressure rod 121, and a stable connection between the buffer layer 122 and the pressure rod 121 can be achieved.

[0084] In other embodiments, a protrusion (not shown in the figure) may be provided at the top of the pressure rod 121, and a mating hole (not shown in the figure) may be provided on the side of the buffer layer 122 facing the pressure rod 121. The two cooperate with each other to achieve a stable connection between the buffer layer 122 and the pressure rod 121.

[0085] It is understandable that when the mating hole 1211 is provided on the pressure rod body 121, the mating hole 1211 at the top of the pressure rod body 121 can be a round hole, and correspondingly, the protrusion 1221 of the buffer layer 122 has a cylindrical structure and matches it. The mating hole 1211 at the top of the pressure rod body 121 can also be a square hole, and correspondingly, the protrusion 1221 of the buffer layer 122 has a prismatic prism structure, as long as the two can fit together, no limitation is made here.

[0086] Based on this, the size of the protrusion 1221 can be larger than the size of the mating hole 1211 so that the outer wall of the protrusion 1221 fits against the inner wall of the mating hole 1211.

[0087] Understandably, the size of the protrusion 1221 can be slightly larger than the size of the mating hole 1211 so that the protrusion 1221 and the mating hole 1211 can achieve an interference fit, thereby securing the buffer layer 122 in the pressure rod body 121 without displacement.

[0088] Continue to refer to Figure 3 As shown, in one embodiment, the pothole protection unit 101 may further include a drive member 180. One end of the drive member 180 may be hinged to the chassis upright plate 210, and the other end of the drive member 180 may be rotatably connected to the transmission assembly 150. For example, the drive member 180 may be a gas spring. The end of the drive member 180 connected to the transmission assembly 150 is its output end.

[0089] Therefore, when the output end of the drive unit 180 extends, it can drive the transmission assembly 150 to rotate, which in turn drives the protective plate 140 to rotate and finally unfold. At this time, the protective plate 140 is set perpendicular to the ground to achieve its anti-tipping function.

[0090] For example, when the left drive member 180a extends, it can correspondingly drive the left transmission assembly 150a to rotate along a predetermined trajectory, thereby causing the connected left protective plate 140a to unfold. When the right drive member 180b extends, it can correspondingly drive the right transmission assembly 150b to rotate along a predetermined trajectory, thereby causing the connected right protective plate 140b to open.

[0091] Understandably, compared to using a single pressure shaft to simultaneously unfold and retract the protective plates 140 on both sides, by setting two pit protection units 101, the unfolded and retracted states of the corresponding protective plate 140 can be switched through a single pit protection unit 101. This allows for unilateral adjustment based on specific circumstances without simultaneously opening the protective plates 140 on both sides, making it more widely applicable.

[0092] Furthermore, the load borne by the pressure shaft is distributed, avoiding single-shaft overload and improving reliability. In addition, the dual pressure shaft design offers better redundancy, reducing the safety risk of single-shaft failure.

[0093] In some embodiments, the transmission assembly 150 may include a rotating rod 151 and a pull rod 152. One end of the rotating rod 151 abuts against the bottom of the buffer pressure shaft 120, and the other end is rotatably connected to the pull rod 152. One end of the pull rod 152 is connected to the rotating rod 151, and the other end is connected to the protective plate 140. Furthermore, the driving member 180 is rotatably connected to the pull rod 152.

[0094] Thus, the rotating rod 151 and the pulling rod 152 can unfold and retract the protective plate 140 under the drive of the driving member 180 or the buffer pressure rod 120.

[0095] Specifically, the protective plate 140 is rotatably connected to the chassis upright plate 210 via the connecting rod 172, and the protective plate 140 and the connecting rod 172 are fixedly connected. The pull rod 152 is rotatably connected to the connecting rod 172, thereby driving the protective plate 140 to rotate relative to the chassis upright plate 210.

[0096] In some embodiments, a guide sleeve 160 may be provided between the pressure shaft guide cylinder 110 and the buffer pressure shaft rod 120, thereby reducing the wear between the pressure shaft guide cylinder 110 and the buffer pressure shaft rod 120 through the provision of the guide sleeve 160.

[0097] Correspondingly, the left guide sleeve 160a is disposed between the left pressure shaft guide sleeve 110a and the left buffer pressure shaft rod 120a. The right guide sleeve 160b is disposed between the right pressure shaft guide sleeve 110b and the right buffer pressure shaft rod 120b.

[0098] In one implementation, two pressure shaft guide cylinders 110 can be arranged side by side on the connecting plate 170, and the connecting plate 170 can be fixed to the chassis upright plate 210 by means of fasteners 171, thereby enabling the positioning of the pressure shaft guide cylinders 110. For example, the fasteners 171 can be a bolt set.

[0099] A second aspect of this application provides a scissor lift truck that includes the pothole protection device 100 described in the above embodiments. The technical effects of this scissor lift truck are the same as those of the above embodiments, and therefore will not be described in detail here.

[0100] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0101] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "one" can be understood to convey either singular or plural usage.

[0102] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0103] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pothole protection device, characterized in that, It includes two sets of pothole protection units, each of which includes: A pressure shaft guide cylinder is installed on the chassis upright plate of the scissor lift. A buffer pressure rod is located inside the pressure rod guide cylinder and moves axially along the pressure rod guide cylinder; the buffer pressure rod is configured to pass through an opening in the chassis bottom plate and abut against the fork of the scissor lift. A dustproof component is disposed between the buffer pressure shaft rod and the opening, and the buffer pressure shaft rod passes through the center hole of the dustproof component; The protective plate and the transmission assembly are provided, with one end of the transmission assembly abutting against the bottom end of the pressure shaft rod, and the other end of the transmission assembly being rotatably connected to the protective plate.

2. The pothole protection device according to claim 1, characterized in that, The dustproof component protrudes from the surface of the chassis bottom plate at the end furthest from the pressure shaft guide cylinder.

3. The pothole protection device according to claim 2, characterized in that, The distance between the top of the dustproof component and the bottom plate of the chassis is greater than or equal to 5mm and less than or equal to 10mm.

4. The pothole protection device according to claim 1, characterized in that, The dustproof component has a groove along its circumferential direction on its side wall, and the dustproof component is secured to the opening through the groove.

5. The pothole protection device according to any one of claims 1-4, characterized in that, The buffer pressure rod includes a pressure rod body and a buffer layer disposed at the top of the pressure rod body, wherein the buffer layer is adapted to contact the fork.

6. The pothole protection device according to claim 5, characterized in that, One of the pressure shaft and the buffer layer has a mating hole, and the other has a protrusion, which is embedded in the mating hole.

7. The pothole protection device according to claim 6, characterized in that, The size of the protrusion is larger than the size of the mating hole, so that the outer wall of the protrusion fits against the inner wall of the mating hole.

8. The pothole protection device according to claim 5, characterized in that, The material of the buffer layer includes one of rubber, polyethylene, and polyurethane.

9. The pothole protection device according to claim 5, characterized in that, The buffer layer covers the entire top wall of the pressure shaft.

10. A scissor lift, characterized in that, Includes the pothole protection device as described in any one of claims 1-9.

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