Lifting limiting device of electric jack

Abstract

The utility model relates to the technical field of jacks, and discloses an electric jack lifting limiting device which comprises a lifting cylinder assembly and a limiting induction assembly, the lifting cylinder assembly comprises a lifting piston and a piston cylinder barrel, the lifting piston is installed on the inner side of the piston cylinder barrel, and the limiting induction assembly comprises a limiting stopper and a limiting stopper support. One end of the limiting stopper support is installed at the tail end of the lifting piston, and the limiting stopper is installed at the other end of the limiting stopper support. According to the utility model, the limiter is arranged on the lifting cylinder component through the limiter bracket, so that the problem of inaccurate sensor installation caused by large manufacturing error of a frame is avoided, and the accurate control on the lifting height of the electric jack is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to jack technical field more specifically relates to a kind of electric jack lifting limiting device. BACKGROUND

[0002] In the field of modern logistics and industrial production, electric pallet truck as a kind of efficient material handling equipment is widely used in various warehouses, factories and other places, and its lifting limiting device plays a crucial role in ensuring the safe and accurate operation of the equipment.

[0003] The lifting limiting device of the electric pallet truck on the market generally adopts the design of being fixed on the frame. In actual production process, the manufacture of the frame involves multiple process links. Due to the factors such as production equipment precision, processing technology difference and raw material characteristics, the manufacturing error of the frame is large. This error makes it difficult to accurately determine the installation position of the sensor, resulting in the sensor being unable to accurately measure the lifting height of the electric jack, reducing the precision of the equipment in controlling the lifting height of the goods. In some scenarios that require high precision in placing goods (such as automatic stereoscopic warehouse goods shelving operation), it is easy to cause deviation in placing goods, affecting the efficiency of warehouse space utilization and the safety of goods storage.

[0004] At the same time, the electric pallet truck is used in complex and diverse environments. Under the influence of factors such as uneven workshop floor, goods loading and unloading impact, and frequent starting and stopping of the vehicle, the vehicle will produce a large vibration. This continuous vibration will gradually cause the sensor fixed on the frame to move. Once the sensor position deviates from the initial set position, the measurement reference will change, resulting in sensor failure. This not only may cause the electric jack to exceed the safe height during lifting, causing goods to fall, equipment damage and other safety accidents, but also increases the maintenance cost and downtime of the equipment, reducing production efficiency. Moreover, due to the uncertainty of the influence of vibration on the position of the sensor, a large amount of manpower and time is required to check and adjust the position of the sensor each time, further affecting the normal use of the electric pallet truck. SUMMARY

[0005] Therefore, the utility model provides a kind of electric jack lifting limiting device, installs the lifting limiting device originally fixed on the frame on jack, realizes the accurate control of the lifting height of jack.

[0006] In order to achieve the above object, the electric jack lifting limiting device provided by the utility model, comprising a lifting cylinder assembly and a limiting sensing assembly, the lifting cylinder assembly comprises a lifting piston and a piston cylinder barrel, the lifting piston is installed on the inner side of the piston cylinder barrel, the limiting sensing assembly comprises a limiter and a limiter support, one end of the limiter support is installed on the tail end of the lifting piston, and the limiter is installed on the other end of the limiter support.

[0007] Preferably, the limiter is installed on the limiter support through a screw and a nut.

[0008] Preferably, the limiter support is installed with the lifting piston through a screw.

[0009] Preferably, the limiter is a microswitch structure.

[0010] Preferably, the limiter is an electromagnetic induction structure.

[0011] Preferably, the limiter support is in the shape of an inverted L.

[0012] Preferably, a rubber buffer pad is arranged between the limiter and the limiter support.

[0013] According to the technical scheme, compared with the prior art, the electric jack lifting limiting device provided by the utility model adopts the mode that the limiter is installed on the lifting cylinder assembly through the limiter support, avoids the problem of inaccurate installation of the sensor caused by large manufacturing error of the vehicle frame, and realizes accurate control of the lifting height of the electric jack. Meanwhile, since the limiter is directly installed on the limiter support that moves synchronously with the lifting piston, the position of the limiter will not be moved due to vibration of the vehicle, effectively preventing failure of the limiter, and greatly improving the safety and reliability of the electric jack. In addition, the rubber buffer pad is arranged between the limiter and the limiter support, which can prevent damage of the limiter due to collision or vibration in the frequent working process, and prolong the service life of the limiter. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the utility model, and other drawings can be obtained by the provided drawings without creative labor for the ordinary skilled in the art.

[0015] Fig. 1 It is the structure explosion map of the electric jack lifting limiting device of the utility model.

[0016] Fig. 2 It is the installation structure drawing of the limiter and the limiter support of the utility model.

[0017] Explanation of reference signs: 1 - screw one, 2 - limiter, 3 - nut, 4 - screw two, 5 - limiter support, 6 - lifting piston, 7 - piston cylinder assembly. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of one exemplary embodiment is only illustrative, rather than any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0019] Please refer to the drawings Figs. 1-2 The utility model discloses an electric jack lifting limiting device.

[0020] The electric jack lifting limiting device provided by the utility model comprises a lifting cylinder assembly and a limiting sensing assembly, and the limiting sensing assembly is installed on the lifting cylinder assembly.

[0021] The lifting cylinder assembly comprises a lifting piston 6 and a piston cylinder barrel 7, the lifting piston 6 is installed on the inner side of the piston cylinder barrel 7, the limiting sensing assembly comprises a limiter 2 and a limiter support 5, one end of the limiter support 5 is installed on the tail end of the lifting piston 6, and the limiter 2 is installed on the other end of the limiter support 5.

[0022] It should be noted that the limiter support 5 is in the shape of inverted L or other shapes facilitating the provision of support for the limiter 2, a rubber buffer pad is arranged between the limiter 2 and the limiter support 5, so as to prevent the limiter 2 from being damaged due to collision or vibration in the frequent working process, prolong the service life of the limiter 2, and the limiter 2 comprises but is not limited to a microswitch structure and an electromagnetic induction structure.

[0023] The mounting process of the electric jack lifting limiting device of the utility model is as follows:

[0024] The lifting piston 6 and the piston cylinder barrel 7 are assembled to form the lifting cylinder assembly, the limiter 2 is installed at the corresponding position on the limiter support 5, is fixed by screw one 1 and nut 3, forms the limiter assembly, the limiter assembly is installed on the corresponding mounting surface of the lifting piston 6, and specifically, the limiter support 5 is installed with the lifting piston 6 through screw two 4.

[0025] The working principle of the electric jack lifting limiting device of the utility model is as follows:

[0026] The lifting cylinder assembly composed of the lifting piston 6 and the piston cylinder 7 is realized reciprocating motion by the external hydraulic unit, and the limiting sensing assembly is composed of the limiter 2, the limiter support 5, the screw one 1 and the nut 3;

[0027] The limiting sensing assembly is installed on the corresponding installation surface of the lifting piston 6, so that the limiter 2 and the lifting piston 6 keep relative static, and synchronous lifting is realized.

[0028] The limiter 2 realizes contact or sensing on the piston cylinder 7 through microswitch contact, electromagnetic induction and the like, so as to monitor the lifting height of the lifting piston 6.

[0029] It should be noted that the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0030] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In addition, if the present application embodiments involve "first", "second" and the like, the "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions, for example, "A and / or B" includes A solution, or B solution, or A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0032] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting limit device for an electric jack, characterized in that, The device includes a lifting cylinder assembly and a limit sensing assembly. The lifting cylinder assembly includes a lifting piston (6) and a piston cylinder barrel (7). The lifting piston (6) is installed inside the piston cylinder barrel (7). The limit sensing assembly includes a limiter (2) and a limiter bracket (5). One end of the limiter bracket (5) is installed at the end of the lifting piston (6), and the limiter (2) is installed at the other end of the limiter bracket (5).

2. The electric jack lifting limit device according to claim 1, characterized in that, The limiter (2) is mounted on the limiter bracket (5) by screw (1) and nut (3).

3. The electric jack lifting limit device according to claim 1, characterized in that, The limiter bracket (5) is installed with the lifting piston (6) by screw two (4).

4. The electric jack lifting limit device according to claim 1, characterized in that, The limiter (2) is a micro switch structure.

5. The electric jack lifting limit device according to claim 1, characterized in that, The limiter (2) is an electromagnetic induction structure.

6. The electric jack lifting limit device according to claim 1, characterized in that, The limiter bracket (5) is in the shape of an inverted L.

7. The electric jack lifting limit device according to claim 1, characterized in that, A rubber buffer pad is provided between the limiter (2) and the limiter bracket (5).

Images