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CN108590298B - Cross-connecting clamping jaw - Google Patents

Cross-connecting clamping jaw Download PDF

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Publication number
CN108590298B
CN108590298B CN201810439154.9A CN201810439154A CN108590298B CN 108590298 B CN108590298 B CN 108590298B CN 201810439154 A CN201810439154 A CN 201810439154A CN 108590298 B CN108590298 B CN 108590298B
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double
ratchet wheel
tooth
flexible rope
handover
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CN108590298A (en
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朱奕名
曹怡鹏
叶琦
王飞
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Ningbo University of Technology
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Ningbo University of Technology
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H6/00Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
    • E04H6/42Devices or arrangements peculiar to garages, not covered elsewhere, e.g. securing devices, safety devices, monitoring and operating schemes; centering devices

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  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
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Abstract

本发明公开了一种交接卡爪,包括底板和盖设在所述底板上的盖板,在所述底板上转动设置有一双齿棘轮,在所述双齿棘轮上设置有销,还包括一活动板,所述活动板上设置有与所述销配合的滑槽,在所述双齿棘轮上开设有线槽,柔性绳绕过双齿棘轮的线槽,在所述柔性绳上设置有阻挡部件,所述阻挡部件与双齿棘轮中的一个棘齿顶靠,所述双齿棘轮的一侧设置有滑轮,所述柔性绳通过所述滑轮,所述柔性绳的一端设置有拉簧,所述柔性绳的另一端连接有一触发推板,所述触发推板在底板上的滑槽中滑动设置。交接卡爪使用纯机械控制,两个卡爪之间互相触发开关,改变各自卡爪中活动板的位置状态。且由于不需要任何电控装置,节约了成本也降低了故障率。

Figure 201810439154

The invention discloses a handover clamping claw, comprising a bottom plate and a cover plate covered on the bottom plate, a double-tooth ratchet wheel is rotatably arranged on the bottom plate, a pin is arranged on the double-tooth ratchet wheel, and a cover plate is further included. A movable plate, the movable plate is provided with a chute that cooperates with the pin, a wire slot is set on the double-tooth ratchet, the flexible rope goes around the wire groove of the double-tooth ratchet, and a blocking device is arranged on the flexible rope The blocking member abuts against one ratchet tooth of the double-toothed ratchet, one side of the double-toothed ratchet is provided with a pulley, the flexible rope passes through the pulley, and one end of the flexible rope is provided with a tension spring, The other end of the flexible rope is connected with a triggering push plate, and the triggering push plate is slidably arranged in the chute on the bottom plate. The handover claws use pure mechanical control, and the two claws trigger switches to each other to change the position state of the movable plate in the respective claws. And because no electronic control device is required, the cost is saved and the failure rate is reduced.

Figure 201810439154

Description

交接卡爪handover jaws

技术领域technical field

本发明涉及卡爪技术领域,更加具体的说,涉及一种在立体停车装置上使用的交接卡爪。The invention relates to the technical field of jaws, and more particularly, to a handover jaw used in a three-dimensional parking device.

背景技术Background technique

随着我国大中城市经济的发展、现代化进程的不断加快,以及汽车生产成本和价格的下降以及个人购车消费水平的提高,我国私人汽车数量快速增长,私人汽车将大规模的进入家庭,给城市小区的停车问题带来了很大压力。停车设施作为机动车停放的空问题,在改善消防通道、绿化品质和小区整体环境的同时,其建设状况与城市交通运行状况、城市社会经济发展密切相关。我国治堵几年来,“缓解停车难”一直是各级政府、治堵办和相关部门工作中的重点。由于大多老旧小区建成时间较早,社区道路狭窄、停车位缺乏,车辆一般停在附近马路旁,但由于马路宽度不到5米,晚高峰时车辆集中停放,很容易造成拥堵,诸多问题,让很多居民烦恼。因此制造新型、实用、占地面积小的停车装置,已经迫在眉睫。With the economic development of my country's large and medium-sized cities, the continuous acceleration of the modernization process, the decline in the production cost and price of automobiles, and the improvement of the level of personal automobile consumption, the number of private automobiles in our country has grown rapidly, and private automobiles will enter the households on a large scale and provide urban services to cities. The parking problem in the community has brought a lot of pressure. As an empty problem for motor vehicle parking, while improving the fire passage, greening quality and the overall environment of the community, the construction status of the parking facility is closely related to the urban traffic operation and the urban social and economic development. Over the past few years, "relieving parking difficulties" has always been the focus of the work of governments at all levels, congestion control offices and related departments. Because most of the old communities were built earlier, the community roads are narrow and the parking spaces are lacking, vehicles are generally parked beside the nearby roads. However, because the width of the road is less than 5 meters, the vehicles are parked in a concentrated manner during the evening rush hour, which can easily cause congestion and many problems. annoyed many residents. Therefore, it is imminent to manufacture a new, practical, and small-footprint parking device.

对此市面上出现了立体停车车库,以使得较小面积的空间能够竟可能多的停放车辆,交接卡爪是立体停车车库主要部件,然而,现有交接卡爪大都需要采用控制机构控制,故障率较高。上述问题,亟待解决。In this regard, three-dimensional parking garages have appeared on the market, so that as many vehicles as possible can be parked in a small area of space. The handover claws are the main components of the three-dimensional parking garage. However, most of the existing handover claws need to be controlled by a control mechanism. higher rate. The above problems need to be solved urgently.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于克服现有技术中存在的缺陷,提供了一种交接卡爪。The purpose of the present invention is to overcome the defects existing in the prior art, and to provide a handover claw.

本发明是通过如下技术方案实现的:一种交接卡爪,包括底板和盖设在所述底板上的盖板,在所述底板上转动设置有一双齿棘轮,在所述双齿棘轮上设置有销,还包括一活动板,所述活动板上设置有与所述销配合的滑槽,在所述双齿棘轮上开设有线槽,柔性绳绕过双齿棘轮的线槽,在所述柔性绳上设置有阻挡部件,所述阻挡部件与双齿棘轮中的一个棘齿顶靠,所述双齿棘轮的一侧设置有滑轮,所述柔性绳通过所述滑轮,所述柔性绳的一端设置有拉簧,所述柔性绳的另一端连接有一触发推板,所述触发推板在底板上的滑槽中滑动设置。The present invention is achieved through the following technical solutions: a handover jaw includes a bottom plate and a cover plate covered on the bottom plate, a double-tooth ratchet wheel is rotatably arranged on the bottom plate, and a double-tooth ratchet wheel is arranged on the double-tooth ratchet wheel There is a pin, and also includes a movable plate, the movable plate is provided with a chute that cooperates with the pin, a wire slot is set on the double-tooth ratchet, and the flexible rope goes around the wire slot of the double-tooth ratchet. A blocking member is arranged on the flexible rope, the blocking member abuts against one ratchet tooth of the double-toothed ratchet, one side of the double-toothed ratchet is provided with a pulley, the flexible rope passes through the pulley, and the flexible rope passes through the pulley. One end is provided with a tension spring, and the other end of the flexible rope is connected with a triggering push plate, and the triggering push plate is slidably arranged in the chute on the bottom plate.

上述技术方案中,在所述底板上设置有一弹性销,所述弹性销和所述双齿棘轮中的另一个棘齿顶靠以用于充当制退器。In the above technical solution, an elastic pin is provided on the bottom plate, and the elastic pin abuts against another ratchet tooth of the double-toothed ratchet to serve as a brake.

上述技术方案中,在所述交接卡爪的端部弹性偏置有预活动块,交接卡爪包括两个压簧,两个所述压簧顶靠所述预活动块,两压簧提供的最小弹力大于拉簧的最大弹力。In the above technical solution, a pre-moving block is elastically biased at the end of the handover claw, and the handover claw includes two compression springs, the two compression springs abut the pre-moving block, and the two compression springs provide The minimum spring force is greater than the maximum spring force of the tension spring.

上述技术方案中,所述柔性绳绕过所述双齿棘轮的角度为180度。In the above technical solution, the angle at which the flexible rope goes around the double-toothed ratchet is 180 degrees.

本发明具有如下有益效果:交接卡爪使用纯机械控制,巧妙地将其功能与“8”字循环运动模式的特点相结合,在每次运动接近结束时,需要相互交接的卡爪轨迹重合,两个卡爪之间互相触发开关,改变各自卡爪中活动板的位置状态。由于卡爪中活动板的位置状态只有上和下,所以卡爪的状态只有张开与闭合,不需要任何控制手段,只需依靠自身特性即可完成交接的控制,方便快捷,且由于不需要任何电控装置,节约了成本也降低了故障率。The invention has the following beneficial effects: the handover claws are controlled purely mechanically, and their functions are skillfully combined with the characteristics of the "8" cyclic motion mode, and the trajectories of the claws that need to be handed over overlap when each movement is close to the end. A switch is triggered between the two claws to change the position state of the movable plate in the respective claws. Since the position status of the movable plate in the jaws is only up and down, the status of the jaws is only open and closed, no control means is needed, and the handover control can be completed only by relying on its own characteristics, which is convenient and fast. Any electronic control device saves costs and reduces the failure rate.

附图说明Description of drawings

图1为交接卡爪在旋转基板两侧的安装结构示意图。FIG. 1 is a schematic diagram of the installation structure of the handover claws on both sides of the rotating base plate.

图2为交接卡爪的分解示意图。FIG. 2 is an exploded schematic view of the handover jaws.

图3为交接卡爪的立体结构示意图。FIG. 3 is a schematic three-dimensional structural diagram of a handover jaw.

图4为交接卡爪的原理示意图。FIG. 4 is a schematic diagram of the principle of handing over the jaws.

具体实施方式Detailed ways

下面结合附图与具体实施方式对本发明作进一步详细描述:参见图1至图4,交接卡爪4,所述交接卡爪4包括卡口200 。所述交接卡爪4包括底板4a和盖设在所述底板4a上的盖板4b,在所述底板4a上转动设置有一双齿棘轮40,在所述双齿棘轮40上设置有销 40a,还包括一活动板41,所述活动板41上设置有与所述销40a配合的滑槽41a,所述销 40a和所述滑槽41a构成曲柄滑块机构,以使得所述双齿棘轮40在转动时,所述活动板41 的一端能够打开或者关闭所述卡口200。The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments: referring to FIGS. 1 to 4 , the handover jaw 4 includes a bayonet 200 . The handover claws 4 include a bottom plate 4a and a cover plate 4b covered on the bottom plate 4a, a double-tooth ratchet wheel 40 is rotatably arranged on the bottom plate 4a, and a pin 40a is arranged on the double-tooth ratchet wheel 40, It also includes a movable plate 41, the movable plate 41 is provided with a chute 41a matched with the pin 40a, the pin 40a and the chute 41a constitute a crank-slider mechanism, so that the double-tooth ratchet 40 During rotation, one end of the movable plate 41 can open or close the bayonet 200 .

在所述双齿棘轮40上开设有线槽,柔性绳42绕过双齿棘轮的线槽180度,在所述柔性绳42上设置有阻挡部件,所述阻挡部件与双齿棘轮40中的一个棘齿顶靠,用于拨动所述双齿棘轮,本实施例中所述阻挡部件设置为绳结;在所述底板上设置有一弹性销100,所述弹性销100和所述双齿棘轮40中的另一个棘齿顶靠以用于充当制退器。所述双齿棘轮40 的一侧设置有滑轮44,所述柔性绳42通过所述滑轮44,所述柔性绳42的一端设置有拉簧 43。通过上述滑轮改变绳子的受力方向使其能使柔性绳绕棘轮转过180度,同时增加拉簧的拉伸行程。所述柔性绳42的另一端连接有一触发推板45,所述触发推板45在底板上的滑槽中滑动设置。A wire slot is provided on the double-tooth ratchet wheel 40 , the flexible rope 42 goes around the wire slot of the double-tooth ratchet wheel 180 degrees, and a blocking member is provided on the flexible rope 42 , and the blocking member is connected to one of the double-tooth ratchet wheel 40 . The ratchet teeth abut against and are used to toggle the double-tooth ratchet wheel. In this embodiment, the blocking member is set as a rope knot; an elastic pin 100 is provided on the bottom plate, and the elastic pin 100 and the double-toothed ratchet wheel are arranged The other ratchet in 40 abuts to act as a brake. One side of the double-tooth ratchet wheel 40 is provided with a pulley 44, the flexible rope 42 passes through the pulley 44, and one end of the flexible rope 42 is provided with a tension spring 43. By changing the force direction of the rope through the pulley, it can make the flexible rope turn 180 degrees around the ratchet, and at the same time increase the stretching stroke of the tension spring. The other end of the flexible rope 42 is connected with a triggering push plate 45, and the triggering push plate 45 is slidably arranged in the chute on the bottom plate.

当推动触发推板时,触发推板在底板上的滑槽中滑动,其前端绕着柔性绳,柔性绳上的绳结推动棘轮旋转180度,同时位于交接卡爪底端的拉簧受力拉伸。棘轮上的销与活动板构成曲柄滑块机构,它们的运动状态改变从而改变交接卡爪的开闭状态。当松开触发推板,在拉簧的力的作用下,其会自动退回初始位置,同时柔性绳上的绳结也退回到原位。棘轮由于在充当制退器的弹性销的作用下,不会反转。When the trigger push plate is pushed, the trigger push plate slides in the chute on the bottom plate, the front end of the trigger push plate is wrapped around the flexible rope, the knot on the flexible rope pushes the ratchet wheel to rotate 180 degrees, and the tension spring at the bottom end of the handover claw is pulled by force stretch. The pins on the ratchet wheel and the movable plate constitute a crank-slider mechanism, and their movement states are changed to change the opening and closing states of the handover claws. When the trigger push plate is released, it will automatically return to the initial position under the force of the tension spring, and the knot on the flexible rope will also return to the original position. The ratchet does not reverse due to the elastic pin acting as a brake.

在所述交接卡爪4的端部弹性偏置有预活动块46,由于受交接卡爪厚度的限制,不能选择直径与线径较大的压簧,为达到所需力的要求,优选的,交接卡爪4包括两个压簧47,两个所述压簧47顶靠所述预活动块46。由两个交接卡爪和一个旋转基板构成一条旋转臂,旋转臂可以与动力及其传递装置的法兰联轴器相连,构成一个基本的旋转单元。A pre-moving block 46 is elastically biased at the end of the handover claw 4. Due to the limitation of the thickness of the handover claw, a compression spring with a larger diameter and wire diameter cannot be selected. In order to achieve the required force, the preferred , the handover jaw 4 includes two compression springs 47 , and the two compression springs 47 abut against the pre-moving block 46 . A rotating arm is composed of two handover claws and a rotating base plate. The rotating arm can be connected with the flange coupling of the power and its transmission device to form a basic rotating unit.

相邻两组旋转基板3上的交接卡爪满足上述旋转基板在转动时,两相邻的交接卡爪之间轨迹重合,也即,两交接卡爪之间预活动块和触发推板之间轨迹重合,且两交接卡爪之间卡口的位置能够连通。The transfer claws on the adjacent two groups of rotating base plates 3 satisfy the requirement that when the above-mentioned rotating base plate rotates, the trajectories between the two adjacent transfer claws overlap, that is, the pre-moving block between the two handover claws and the triggering push plate. The trajectories are coincident, and the positions of the bayonet openings between the two handover claws can be communicated.

所述交接卡爪的交接过程工作原理如下:当两个交接卡爪(交接卡爪A和交接卡爪B)在即将交接时,它们的轨迹即将重合。交接卡爪A的预活动块会将交接卡爪B的触发推板沿着其底板的滑槽向前推。由于推动了触发推板,柔性绳拨动棘轮转过180度,与棘轮相连的曲柄滑块状态发生了改变。交接卡爪B将由原来的开放状态变为闭合状态,对车辆停放篮的轴端实现夹持效果。相对的,B的预活动块也对交接卡爪A有相同的作用,交接卡爪 A将由原来的闭合状态变为开放状态,取消对轴端的夹持,此时轴部从从交接卡爪A交接至交接卡爪B,交接完成。The working principle of the handover process of the handover claws is as follows: when two handover claws (handover claw A and handover claw B) are about to be handed over, their trajectories are about to coincide. The pre-moving block of the handover claw A will push the trigger push plate of the handover claw B forward along the chute of the bottom plate. As the trigger push plate is pushed, the flexible rope toggles the ratchet wheel through 180 degrees, and the state of the crank slider connected to the ratchet wheel changes. The handover jaw B will change from the original open state to the closed state, and achieve the clamping effect on the shaft end of the vehicle parking basket. On the contrary, the pre-moving block of B also has the same effect on the handover claw A. The handover claw A will change from the original closed state to the open state, and the clamping of the shaft end will be cancelled. It is handed over to the handover jaw B, and the handover is completed.

尽管本申请中直接通过相邻两交接卡爪其中一交接卡爪的端部与另一交接卡爪的触发推板也能够实现本发明的技术目的,然而申请人发现在交接过程中,处于交接中的轴端可能会被正在处于上升状态的活动板卡死。引起上述现象的主要原因是由于活动板的移动与触发推板的移动是同步进行的,是一个相互关联的运动过程。因此本发明中设置了预活动块。预活动块位于交接卡爪的顶部,用来在交接过程中推动另一交接卡爪的触发推板。预活动块后方装有压簧。运动阶段如下:初始阶段:卡爪B对轴端处于夹持状态,卡爪A处于开放状态。现欲将卡爪A与卡爪B交接,互相改变卡爪的状态。Although in the present application, the technical purpose of the present invention can also be achieved by directly using the end of one of the two adjacent handover claws and the triggering push plate of the other handover claws, the applicant found that during the handover process, during the handover process, the The end of the shaft may be caught by the movable plate that is in the ascending state. The main reason for the above phenomenon is that the movement of the movable plate and the movement of the trigger push plate are synchronized, which is an interrelated movement process. Therefore, a pre-active block is provided in the present invention. The pre-movement block is located on the top of the handover jaw and is used to push the trigger push plate of the other handover jaw during the handover process. A compression spring is installed behind the pre-moving block. The movement stages are as follows: Initial stage: Claw B is in a clamping state for the shaft end, and Claw A is in an open state. Now we want to hand over the claw A and the claw B, and change the state of the claw mutually.

第一阶段:交接卡爪B的预活动块接触到需要交接的卡爪A中的触发推板,并将其往前推动,活动板开始往里收缩。The first stage: The pre-moving block of the handover claw B contacts the trigger push plate in the claw A that needs to be handed over, and pushes it forward, and the movable plate begins to shrink inward.

第二阶段:随着运动的进行,交接卡爪A的预活动板也触碰到交接卡爪B的接触推板并将其往前推动,同时卡爪B的活动板向外伸出,抵住了正在交接的轴端。Stage 2: As the movement progresses, the pre-moving plate of the handover jaw A also touches the contact push plate of the handover jaw B and pushes it forward. Holds the end of the shaft that is being handed over.

第三阶段:交接卡爪B的预活动块开始压缩其后部的压簧,使交接卡爪A能带动轴端在被卡爪B抵住的情况下继续向内运动一段距离。The third stage: the pre-moving block of the handover claw B begins to compress the compression spring at the rear, so that the handover claw A can drive the shaft end to continue to move inward for a certain distance under the condition of being resisted by the claw B.

第四阶段:交接卡爪的活动板越过轴端,活动阻力消失。由于两压簧提供的最小弹力大于拉簧的最大弹力,交接卡爪B中被压缩的压簧复位,依靠弹力继续推动交接卡爪A 的触发推板直到其行程末尾。The fourth stage: The movable plate of the handover jaw passes over the shaft end, and the movable resistance disappears. Since the minimum elastic force provided by the two compression springs is greater than the maximum elastic force of the tension spring, the compressed compression spring in the transfer claw B resets and continues to push the trigger push plate of the transfer claw A until its stroke ends.

通过预活动块的设置解决了在交接时卡爪与轴端会发生卡死的情况,使交接这一过程能够顺利进行。同时由于预活动弹簧置于卡爪的顶部,与把弹簧安装在活动板处的传动设计相比,提升了活动板的刚性和强度,使交接卡爪更加坚固可靠。另外,顶部的预活动弹簧在交接完成后还可以缓冲交接卡爪中的活动部件,在发生偏转过度等危险情况时保护装置,提升安全性能。The setting of the pre-moving block solves the problem that the jaw and the shaft end will be stuck during the handover, so that the handover process can be carried out smoothly. At the same time, since the pre-moving spring is placed on the top of the jaw, compared with the transmission design in which the spring is installed at the movable plate, the rigidity and strength of the movable plate are improved, and the handover jaw is more firm and reliable. In addition, the pre-moving spring on the top can buffer the moving parts in the handover jaw after the handover is completed, protect the device in the event of dangerous situations such as excessive deflection, and improve the safety performance.

以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制。本申请中上述实施例和说明书中描述的只是本发明的原理,在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进。上述变化和改进都落入要求保护的本发明的范围内。The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions in this application are only the principles of the present invention, and various changes and improvements can be made to the present invention without departing from the spirit and scope of the present invention. The above-mentioned changes and modifications all fall within the scope of the claimed invention.

Claims (3)

1. Handing-over jack catch is established including bottom plate (4 a) and lid apron (4 b) on bottom plate (4 a), its characterized in that: the double-tooth ratchet wheel structure is characterized in that a double-tooth ratchet wheel (40) is arranged on the bottom plate (4 a) in a rotating mode, a pin (40 a) is arranged on the double-tooth ratchet wheel (40), the double-tooth ratchet wheel structure further comprises a movable plate (41), a sliding groove (41 a) matched with the pin (40 a) is formed in the movable plate (41), a wire groove is formed in the double-tooth ratchet wheel (40), a flexible rope (42) bypasses the wire groove of the double-tooth ratchet wheel, a blocking component is arranged on the flexible rope (42) and abuts against one ratchet tooth in the double-tooth ratchet wheel (40), a pulley (44) is arranged on one side of the double-tooth ratchet wheel (40), the flexible rope (42) passes through the pulley (44), a tension spring (43) is arranged at one end of the flexible rope (42), a trigger push plate (45) is connected to the other end of the flexible rope (42), and the trigger push plate (45), an elastic pin (100) is arranged on the bottom plate, and the other ratchet tooth of the elastic pin (100) and the double-tooth ratchet wheel (40) is abutted to act as a brake; the connecting claw (4) comprises a bayonet, and the pin (40 a) and the sliding groove (41 a) form a crank-slider mechanism, so that one end of the movable plate (41) can open or close the bayonet (200) when the double-tooth ratchet wheel (40) rotates.
2. The interface jaw of claim 1, wherein: the end part of the cross-connection clamping jaw (4) is elastically biased to form a pre-movable block (46), the cross-connection clamping jaw (4) comprises two pressure springs (47), the two pressure springs (47) abut against the pre-movable block (46), and the minimum elastic force provided by the two pressure springs is larger than the maximum elastic force of the tension springs.
3. The interface jaw of claim 1, wherein: the angle of the flexible rope (42) passing by the double-tooth ratchet wheel (40) is 180 degrees.
CN201810439154.9A 2018-05-09 2018-05-09 Cross-connecting clamping jaw Expired - Fee Related CN108590298B (en)

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GB888693A (en) * 1956-11-14 1962-01-31 Eugene O Sullivan Improvements in or relating to storage lifts for vehicles
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JP2635916B2 (en) * 1993-08-04 1997-07-30 佐藤鉄工株式会社 Pallet lock device for multi-story parking equipment
JPH1061244A (en) * 1996-08-21 1998-03-03 San Nisuka:Kk Parking controller
JP2000160870A (en) * 1998-11-27 2000-06-13 Furukawa Co Ltd Device for preventing fall of gate of parking facility
KR200232082Y1 (en) * 2000-12-08 2001-07-19 손우환 Stopper device of pinion shaft
CN1236185C (en) * 2004-05-17 2006-01-11 武汉理工大学 Stereo garage
CN2886002Y (en) * 2006-04-24 2007-04-04 江苏双良停车设备有限公司 Crank transferring pallet car
CN103291781B (en) * 2012-02-23 2015-12-16 深圳市蓝韵实业有限公司 Ratchet brake structure and there is the Height-adjustable of ratchet brake structure

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