CN211500479U

CN211500479U - Parallel two-stage telescopic mechanism

Info

Publication number: CN211500479U
Application number: CN201921736006.XU
Authority: CN
Inventors: 寇树芳
Original assignee: Inner Mongolia University of Science and Technology
Current assignee: Inner Mongolia University of Science and Technology
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-09-15
Anticipated expiration: 2029-10-16

Abstract

The utility model belongs to the technical field of telescoping devices, in particular to a parallel secondary telescoping mechanism, which comprises a fixed upright post, a primary telescoping mechanism and a secondary telescoping mechanism, wherein the primary telescoping mechanism comprises two primary supporting arms which are arranged in a crossed way and two primary linkage arms which are arranged in a crossed way, and the front end of the primary supporting arm is arranged on the fixed upright post through a positioning shaft; a primary driving push rod and a primary driven push rod are arranged on the primary telescopic mechanism; the rear end of the primary driven push rod is coaxially connected with the other group of primary supporting arms and the primary linkage arm; the secondary telescopic mechanism is arranged as the primary telescopic mechanism. The utility model has reasonable structure, and in the whole mechanism, the push rod, the linkage arm and the supporting arm are mutually drawn and supported to form a stable structure, so that the whole device is in a stable state; the mechanism converts the vertical movement of the telescopic rod into the transverse movement of the supporting arm, and the moving process of the telescopic rod does not occupy extra space.

Description

Parallel two-stage telescopic mechanism

Technical Field

The utility model relates to a telescopic machanism specifically is a parallel second grade telescopic machanism.

Background

The telescopic machanism usage is extensive, is often used for among push-and-pull door and elevating gear, and to the push-and-pull door, owing to there is ground to support, the sunken problem of structure need not be considered to used telescopic machanism, and to elevating gear, because the whole focus of mechanism is located the supporting seat middle part, used telescopic machanism stability is better relatively, but these mechanisms are not suitable for unsettled setting, to unsettled parallel telescopic device, need new telescopic machanism to satisfy the user demand.

Disclosure of Invention

An object of the utility model is to provide a parallel second grade telescopic machanism, this telescopic machanism can unsettled parallel flexible to satisfy unsettled telescoping device's needs, solve the sunken problem of the telescopic machanism that proposes in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a parallel second grade telescopic machanism, includes fixed stand, one-level telescopic machanism, second grade telescopic machanism to and the linkage stand, wherein the fixed stand is connected to one-level telescopic machanism, and one-level telescopic machanism and second grade telescopic machanism pass through the linkage stand and connect. The primary telescopic mechanism comprises two primary supporting arms arranged in a crossed manner and two primary linkage arms arranged in a crossed manner, wherein the front ends of the primary supporting arms are arranged on the fixed stand columns through positioning shafts, the rear ends of the primary supporting arms are hinged with the corresponding primary linkage arms through connecting shafts, and the tail ends of the primary linkage arms are connected with the linkage stand columns through the positioning shafts; the primary telescopic mechanism is provided with a primary driving push rod and a primary driven push rod, wherein the front end of the primary driving push rod is coaxially connected with a group of primary supporting arms and a primary linkage arm, the middle part of the primary driving push rod is connected with the primary supporting arms in a shearing mode through a connecting shaft, and the rear end of the primary driving push rod is connected with a longitudinal telescopic mechanism arranged on the fixed stand column; the rear end of the first-stage driven push rod is coaxially connected with the other group of first-stage supporting arms and the first-stage linkage arm, the middle part of the first-stage driven push rod is connected with the first-stage linkage arm in a shearing mode through a connecting shaft, and the tail end of the first-stage driven push rod is connected with a linkage upright column in a sliding mode; the secondary telescopic mechanism comprises a secondary supporting arm and a secondary linkage arm which are symmetrically arranged with the primary telescopic mechanism, and the tail ends of the secondary supporting arm and the secondary linkage arm are connected with the moving upright post through a positioning shaft; the second-stage telescopic mechanism further comprises a second-stage driving push rod and a second-stage driven push rod which are symmetrically arranged with the first-stage driving push rod and the first-stage driven push rod, and the rear end of the second-stage driving push rod is coaxially connected with the first-stage driven push rod.

In the technical scheme, the primary telescopic mechanism and the secondary telescopic mechanism are connected through a linkage upright post, push rods arranged in the telescopic mechanisms are linked with each other, and the translation and the extension of the whole mechanism can be controlled by pushing a primary driving push rod; in the whole mechanism, the push rod, the linkage arm and the supporting arm are mutually pulled and supported to form a stable structure, so that the whole device is in a stable state. In addition, the end parts of the supporting arms which are arranged in a crossed manner are connected with the corresponding upright posts through positioning shafts, so that the normal extension is not influenced, and the stability of the whole mechanism can be improved; the push rod and the supporting arm which are arranged in a scissor mode are connected with each other, so that the stretching and retracting can be controlled, and the stability of the whole mechanism can be improved.

Preferably, the longitudinal telescopic mechanism comprises a telescopic rod longitudinally arranged on the fixed upright post and a sliding shaft, and the sliding shaft is arranged at the top of the pushing device and moves directionally; the rear end of the primary driving push rod is provided with a stroke limiting groove, and the stroke limiting groove is sleeved on the sliding shaft. The telescopic link sets up in fixed stand one side, and its pars contractilis need not occupy extra space, through the effect of sliding shaft and one-level initiative push rod upstroke spacing groove, turns into lateral shifting with vertical motion, saves space.

Preferably, a guide limiting groove is vertically arranged on the fixed upright post, and the sliding shaft transversely penetrates through the guide limiting groove. The direction spacing groove can lead to the sliding shaft, increases the stability that the sliding shaft removed the process, can support the sliding shaft simultaneously, avoids the telescopic link to stretch out stability variation after completely.

Preferably, a guide limit groove is arranged in the middle of the linkage upright post, and a sliding shaft is arranged in the groove; the front end of the first-stage driven push rod and the rear end of the second-stage driving push rod are provided with stroke limiting grooves, and the sliding shaft penetrates through the stroke limiting grooves. The first-stage driven push rod and the second-stage driving push rod are connected end to end, can move simultaneously to achieve the purpose of linkage, can slide relatively to control the mechanism to stretch normally.

Preferably, the middle part of the movable upright post is provided with a guide limiting groove, a sliding shaft is arranged in the guide limiting groove, the front end of the secondary driven push rod is provided with a stroke limiting groove, and the limiting groove is sleeved on the sliding shaft. The secondary driven push rod is used for controlling the extension and retraction of the secondary linkage arm, and the end part of the secondary driven push rod is connected with the moving upright post, so that the acting point of the secondary driven push rod can be increased, and the stability among the secondary linkage arm, the moving upright post and the secondary driven push rod is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic plan view of a first embodiment of the present invention.

Fig. 2 is a schematic plan view of the half-spread state of the first embodiment.

Fig. 3 is a schematic plan view of the fully expanded state of the first embodiment.

Fig. 4 is a schematic structural diagram of a position of the pushing device in the first embodiment.

Fig. 5 is a schematic plan view of a second embodiment of the present invention.

In the figure, a fixed upright post 1, a primary supporting arm 2, a primary linkage arm 3, a linkage upright post 4, a primary driving push rod 5, a primary driven push rod 6, a connecting shaft 7, a sliding shaft 8, a stroke limiting groove 9, a guide limiting groove 10, a positioning shaft 11, a telescopic rod 12, a movable upright post 20, a secondary supporting arm 21, a secondary linkage arm 22, a secondary driving push rod 51 and a secondary driven push rod 61.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

Referring to fig. 1-3, the present invention provides a first embodiment: the utility model provides a parallel second grade telescopic machanism, includes stationary mast 1, one-level telescopic machanism, second grade telescopic machanism to and linkage stand 4, wherein the stationary mast 1 is connected to one-level telescopic machanism, and one-level telescopic machanism and second grade telescopic machanism pass through linkage stand 4 and connect. The primary telescopic mechanism comprises two primary supporting arms 2 arranged in a crossed manner and two primary linkage arms 3 arranged in a crossed manner, wherein the front ends of the primary supporting arms 2 are arranged on the fixed upright posts 1 through positioning shafts 11, the rear ends of the primary supporting arms are hinged with the corresponding primary linkage arms 3 through connecting shafts 7, and the tail ends of the primary linkage arms 3 are connected with the linkage upright posts 4 through the positioning shafts 11; a primary driving push rod 5 and a primary driven push rod 6 are arranged on the primary telescopic mechanism, wherein the front end of the primary driving push rod 5 is coaxially connected with a group of primary supporting arms 2 and a primary linkage arm 3, the middle part of the primary driving push rod is connected with the primary supporting arms 2 in a shearing mode through a connecting shaft 7, and the rear end of the primary driving push rod is connected with a longitudinal telescopic mechanism arranged on the fixed upright post 1; the rear end of the first-stage driven push rod 6 is coaxially connected with the other group of first-stage supporting arms 2 and the first-stage linkage arms 3, the middle part of the first-stage driven push rod is connected with the first-stage linkage arms 3 in a shearing mode through a connecting shaft 7, and the tail end of the first-stage driven push rod 6 is connected with a linkage upright post 4 in a sliding mode; the secondary telescopic mechanism comprises a secondary supporting arm 21 and a secondary linkage arm 22 which are symmetrically arranged with the primary telescopic mechanism, and the tail ends of the secondary supporting arm 21 and the secondary linkage arm 22 are connected with the movable upright post 20 through a positioning shaft 11; the second-stage telescopic mechanism further comprises a second-stage driving push rod 51 and a second-stage driven push rod 61 which are symmetrically arranged with the first-stage driving push rod 5 and the first-stage driven push rod 6, and the rear end of the second-stage driving push rod 51 is coaxially connected with the first-stage driven push rod 6.

In the embodiment, the primary telescopic mechanism and the secondary telescopic mechanism are connected through a linkage upright post 4, push rods arranged in the telescopic mechanisms are mutually linked, and the translation and the extension of the whole mechanism can be controlled by pushing a primary driving push rod 5; the end parts of the supporting arms 2 which are arranged in a crossed manner are connected with the corresponding upright posts through the positioning shafts 11, so that the normal extension is not influenced, and the stability of the whole mechanism can be improved; the push rod and the supporting arm which are arranged in a scissor mode are connected with each other, so that the stretching and retracting can be controlled, and the stability of the whole mechanism can be improved. After the mechanism is completely unfolded, the push rod, the linkage arm, the supporting arm and the like are mutually pulled and supported to form a stable structure, so that the whole device is in a stable state.

Further, the longitudinal telescopic mechanism comprises a telescopic rod 12 and a sliding shaft 8 which are longitudinally arranged on the fixed upright post 1, the telescopic rod 12 adopts an oil cylinder, and the sliding shaft 8 is arranged at the top of the pushing device and moves directionally; the rear end of the primary driving push rod 5 is provided with a stroke limiting groove 9, and the stroke limiting groove 9 is sleeved on the sliding shaft 8. The telescopic rod 12 is arranged on one side of the fixed upright post 1, the telescopic part of the telescopic rod does not occupy extra space, and vertical motion is converted into transverse movement through the action of the sliding shaft 8 and the upper stroke limiting groove 9 of the first-stage driving push rod 5, so that space is saved.

In the embodiment, all the limiting grooves are rectangular waist grooves, and the sliding shaft 8 can slide under the constraint of the limiting grooves.

Further, a guide limiting groove 10 is vertically arranged on the fixed upright post 1, and the sliding shaft 8 transversely penetrates through the guide limiting groove 10. The direction spacing groove 10 can lead to sliding shaft 8, increases sliding shaft 8 and removes the stability of process, can support sliding shaft 8 simultaneously, avoids telescopic link 12 to stretch out back stability variation completely.

Further, a guide limiting groove 10 is arranged in the middle of the linkage upright post 4, and a sliding shaft 8 is arranged in the groove; the front end of the first-stage driven push rod 6 and the rear end of the second-stage driving push rod 51 are provided with a stroke limiting groove 9, and the sliding shaft 8 penetrates through the stroke limiting groove 9. The first-stage driven push rod 6 and the second-stage driving push rod 51 are connected end to end, so that the linkage purpose can be achieved by moving simultaneously, relative sliding can be achieved, and the mechanism is controlled to stretch normally.

Further, the middle part of the movable upright post 20 is provided with a guide limiting groove 10, a sliding shaft 8 is arranged in the guide limiting groove, the front end of the secondary driven push rod 61 is provided with a stroke limiting groove 9, and the stroke limiting groove is sleeved on the sliding shaft 8. The secondary driven push rod 61 is used for controlling the extension and contraction of the secondary linkage arm 22, and the end part of the secondary driven push rod 61 is connected with the moving upright post 20, so that the acting point of the secondary driven push rod 61 can be increased, and the stability among the secondary linkage arm 22, the moving upright post 20 and the secondary driven push rod 61 is increased.

Fig. 4 shows a second embodiment of the present invention, which is different from the first embodiment in that the front end of the second-stage driven push rod 61 is not connected to the moving upright 20, and when the stability of the whole mechanism meets the requirement, the front end of the shortened second-stage driven push rod 61 does not extend out of the moving upright 20, and the mechanism does not occupy extra space during the extension process.

The working principle is as follows: taking the extending process as an example, the oil cylinder pushes the sliding shaft 8 at the top of the oil cylinder to move upwards, the sliding shaft 8 drives the tail end of the primary driving push rod 5 to slide upwards, the primary driving push rod 5 rotates around the connecting shaft 7 at the middle of the primary driving push rod 5 in the upwards moving process and drives the primary supporting arm 2 to deflect, so that the crossed structure formed by the primary supporting arm 2 extends; meanwhile, the primary supporting arm 2 drives the primary driven push rod 6 to move, the primary driven push rod 6 pushes the cross structure formed by the primary linkage arm 3 to extend, the linkage upright post 4 moves forwards, the primary driven push rod 6 drives the secondary driving push rod 51 to move in the process, and the whole secondary telescopic mechanism moves synchronously in the same moving mode as the primary telescopic mechanism, so that the whole mechanism is extended.

The utility model has reasonable structure, the end part of the supporting arm which is arranged in a crossed way and connected with the upright post only rotates and moves in the expansion process, and the whole process keeps the connection state with the upright post, thereby ensuring better stability; the mechanism converts the vertical movement of the telescopic rod into the transverse movement of the supporting arm, and the moving process of the telescopic rod does not occupy extra space, so that convenience is brought to the use of the mechanism. The supporting arm and the linkage arm in the mechanism are mutually drawn and supported, so that the whole mechanism becomes a stable mechanism, and the effect of horizontal extension is achieved.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. Furthermore, the term "coupled" is intended to encompass any direct or indirect electrical coupling. Thus, if a first device couples to a second device, that connection may be through a direct electrical coupling or through an indirect electrical coupling via other devices and couplings. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a parallel second grade telescopic machanism, includes stationary mast, one-level telescopic machanism, second grade telescopic machanism to and the linkage stand, wherein the stationary mast is connected to one-level telescopic machanism, and one-level telescopic machanism and second grade telescopic machanism pass through the linkage stand and connect its characterized in that: the primary telescopic mechanism comprises two primary supporting arms arranged in a crossed manner and two primary linkage arms arranged in a crossed manner, wherein the front ends of the primary supporting arms are arranged on the fixed stand columns through positioning shafts, the rear ends of the primary supporting arms are hinged with the corresponding primary linkage arms through connecting shafts, and the tail ends of the primary linkage arms are connected with the linkage stand columns through the positioning shafts; the primary telescopic mechanism is provided with a primary driving push rod and a primary driven push rod, wherein the front end of the primary driving push rod is coaxially connected with a group of primary supporting arms and a primary linkage arm, the middle part of the primary driving push rod is connected with the primary supporting arms in a shearing mode through a connecting shaft, and the rear end of the primary driving push rod is connected with a longitudinal telescopic mechanism arranged on the fixed stand column; the rear end of the first-stage driven push rod is coaxially connected with the other group of first-stage supporting arms and the first-stage linkage arm, the middle part of the first-stage driven push rod is connected with the first-stage linkage arm in a shearing mode through a connecting shaft, and the tail end of the first-stage driven push rod is connected with a linkage upright column in a sliding mode; the secondary telescopic mechanism comprises a secondary supporting arm and a secondary linkage arm which are symmetrically arranged with the primary telescopic mechanism, and the tail ends of the secondary supporting arm and the secondary linkage arm are connected with the moving upright post through a positioning shaft; the second-stage telescopic mechanism further comprises a second-stage driving push rod and a second-stage driven push rod which are symmetrically arranged with the first-stage driving push rod and the first-stage driven push rod, and the rear end of the second-stage driving push rod is coaxially connected with the first-stage driven push rod.

2. A parallel two stage telescoping mechanism as in claim 1, wherein: the longitudinal telescopic mechanism comprises a telescopic rod and a sliding shaft which are longitudinally arranged on the fixed upright post, and the sliding shaft is arranged at the top of the pushing device and moves directionally; the rear end of the primary driving push rod is provided with a stroke limiting groove, and the stroke limiting groove is sleeved on the sliding shaft.

3. A parallel two stage telescoping mechanism as in claim 2, wherein: the fixed upright post is vertically provided with a guide limiting groove, and the sliding shaft transversely penetrates through the guide limiting groove.

4. A parallel two stage telescoping mechanism as claimed in any of claims 1 to 3, wherein: the middle part of the linkage upright post is provided with a guide limiting groove, and a sliding shaft is arranged in the guide limiting groove; the front end of the first-stage driven push rod and the rear end of the second-stage driving push rod are provided with stroke limiting grooves, and the sliding shaft penetrates through the stroke limiting grooves.

5. A parallel two stage telescoping mechanism as in claim 4, wherein: the middle part of the movable upright post is provided with a guide limiting groove, a sliding shaft is arranged in the guide limiting groove, the front end of the secondary driven push rod is provided with a stroke limiting groove, and the stroke limiting groove is sleeved on the sliding shaft.