Distance-multiplying telescopic device

Abstract

The utility model discloses a multiple-distance telescopic device, and particularly belongs to the technical field of telescopic equipment. Comprising multiple stages of lead screw barrels which are sequentially arranged in a sleeving mode, outer threads are arranged on the outer walls of the lead screw barrels, through guide grooves are formed in the barrel walls, shell sleeves are correspondingly arranged outside the lead screw barrels, nut blocks are fixed to the inner walls of the shell sleeves, the shell sleeves are meshed with the outer threads of the lead screw barrels of the previous stage through the nut blocks, and the lead screw barrels of the previous stage are sleeved with the nut blocks. Bearings are connected in the shell sleeves, connecting pins are arranged on the bearings, penetrate through the guide grooves of the upper-stage lead screw barrel and are fixedly connected with the corresponding lead screw barrel, and the shell sleeves are sequentially sleeved with one another; when the device is used, the screw rod barrels rotate synchronously, no torsion needs to be applied, and the service life is long.

Description

TECHNICAL FIELD

[0001] The utility model belongs to telescopic equipment technical field, specifically belongs to a kind of telescopic device. BACKGROUND

[0002] The existing telescopic device mostly includes telescopic rod and telescopic sleeve, the outer wall of telescopic rod and the inner wall of telescopic sleeve are provided with threads and are connected, by relatively rotating telescopic rod and telescopic sleeve, the two are close or far away, further, telescopic rod is penetrated by threaded hole along axis, and further, a threaded rod is installed in the threaded hole of telescopic rod, to realize multistage telescopic, but the both ends of the telescopic device need relatively rotate to realize telescopic, in actual application, one end of telescopic device is fixed, and torque is applied to the other end, which can cause damage to support surface. SUMMARY

[0003] Therefore, the utility model aims at overcoming the deficiencies in the prior art, and provides a telescopic device with double the distance, which provides the following technical solutions:

[0004] It comprises a plurality of silk rod cylinders that are sequentially sleeved, the silk rod cylinder is provided with external threads on the outer wall and a through guide groove on the cylinder wall, the outer wall of the silk rod cylinder is provided with a shell sleeve, the inner wall of the shell sleeve is fixed with a nut block, the shell sleeve is engaged with the external threads of the upper level silk rod cylinder through the nut block, and the shell sleeve is connected with a bearing, the bearing is provided with a connecting pin that is fixedly connected with the corresponding silk rod cylinder by penetrating the guide groove of the upper level silk rod cylinder, and the shell sleeves are sequentially sleeved.

[0005] The inner wall of the silk rod cylinder is fixed with a guide pin, and the guide pin on the upper level silk rod cylinder of adjacent silk rod cylinders is slidingly engaged with the guide groove of the lower level silk rod cylinder.

[0006] It further comprises a driving motor, which is drivingly connected with the first level silk rod cylinder for driving the first level silk rod cylinder to rotate.

[0007] As the above technical solutions are adopted, the utility model has the following beneficial effects:

[0008] By setting the multi-stage nested screw rod cylinder, and setting the shell outside the screw rod cylinder, the shell and the upper screw rod cylinder are provided with a nut block, the nut block and the upper screw rod cylinder form a screw rod guide rail structure, when the upper screw rod cylinder rotates, the nut block moves along the screw thread to drive the shell to move relative to the upper screw rod cylinder, when the shell moves, the corresponding screw rod cylinder is also moved by the bearing and the connecting pin on the bearing, that is, the adjacent screw rod cylinders are extended and retracted, at the same time, the connecting pin limits the rotation between the adjacent screw rod cylinders, so that all the screw rod cylinders rotate synchronously, and the connecting pin and the shell are provided with a bearing, so that the connecting pin does not interfere with the shell when rotating with the screw rod cylinder, so that the multiple screw rod cylinders are extended and retracted, and the multiple nested shells are extended and retracted; At the same time, a guide pin is arranged between the adjacent screw rod cylinders, when the multi-stage screw rod cylinder slides relative to each other, the movement is more stable, and when the multi-stage screw rod cylinder rotates synchronously, the rotating force is also transmitted through the guide pin; The screw rod cylinders rotate synchronously, without applying a torsion force, and have a long service life.

[0009] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as a limitation on the scope, for those skilled in the art, without creative labor, other related drawings can also be obtained from these drawings.

[0011] Figure 1 It is a kind of telescopic device schematic diagram.

[0012] Figure 2 It is a kind of telescopic device detail drawing.

[0013] Reference signs: 1, screw rod cylinder;11, guide groove;12, guide pin;2, shell;21, nut block;22, bearing;23, connecting pin;3, drive motor. DETAILED DESCRIPTION

[0014] The embodiments of the present application will be described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation on the present application.

[0015] In this application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" should be construed as broad terms, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0016] In this application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0017] Please refer to Figures 1-2 The utility model provides a kind of telescopic device of times of the present application as shown in the figure;

[0018] It includes multi-stage in turn sleeve setting screw rod cylinder 1, screw rod cylinder 1, the outer wall of screw rod cylinder 1 is provided with outer thread and the wall of cylinder is provided with through guide slot 11, the outer sleeve 2 of screw rod cylinder 1 is provided with, the inner wall of sleeve 2 is fixed with nut block 21, sleeve 2 is engaged with the outer thread of the screw rod cylinder 1 of upper stage by nut block 21, and sleeve 2 is connected with bearing 22, bearing 22 is provided with connecting pin 23, and connecting pin 23 is fixedly connected with corresponding screw rod cylinder 1 by passing through the guide slot 11 of the screw rod cylinder 1 of upper stage, and sleeve 2 is sequentially sleeved.

[0019] The inner wall of screw rod cylinder 1 is fixed with guide pin 12, and the guide pin 12 on the screw rod cylinder 1 of upper stage of adjacent screw rod cylinder 1 is slidably engaged with the guide slot 11 of the screw rod cylinder 1 of lower stage.

[0020] It also includes driving motor 3, and driving motor 3 is drivingly connected with the first screw rod cylinder 1, for driving the rotation of the first screw rod cylinder 1.

[0021] As Figure 1As shown, the total includes three silk rod cylinders 1 and four square sleeves 2, the fourth sleeve 2 is not connected with the corresponding silk rod cylinder through bearing 22 and connecting pin 23, only through the nut block 21 and the upper level silk rod cylinder 1 (third silk rod cylinder 1) cooperation, and the first sleeve 2 is the highest level, so the first sleeve 2 is fixed on the seat body shell in this embodiment, the first silk rod cylinder 1 is also bearing installed in the seat body, the driving motor 3 is installed on the seat body, and the transmission belt in the seat body is drivingly connected with the first silk rod cylinder 1.

[0022] In specific implementation, the driving motor drives the first silk rod cylinder 1 to rotate, and the second silk rod cylinder 1 is connected with the first silk rod cylinder 1 through the guide pin 12 and the connecting pin 23, so that the second silk rod cylinder 1 rotates synchronously, the third silk rod cylinder 1 is also connected with the second silk rod cylinder 1 through the guide pin 12 and the connecting pin 23, so that the third silk rod cylinder 1 rotates synchronously, therefore, the nut block 21 of the second sleeve 2 moves outward on the first silk rod cylinder 1, the second sleeve 2 moves out with the nut block 21 thereon, and pulls the second silk rod cylinder 1 to move synchronously through the bearing 22 and the connecting pin 23, so that the second silk rod cylinder 1 moves out in the first silk rod cylinder 1, the nut block 21 of the third sleeve 2 moves outward on the second silk rod cylinder 1, the third sleeve 2 pulls the third silk rod cylinder 1 to move out in the second silk rod cylinder 1, and the fourth sleeve 2 moves out on the third sleeve 2 through the nut block 21 thereon, so as to realize the extension, it is easy to think that when the contraction, the rotation direction of the silk rod cylinder 1 is opposite, and the movement direction of the sleeve 2 is opposite to realize the contraction.

[0023] Although the embodiments of the application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. A telescopic device for multiplying distances, characterized in that: The application relates to a multi-stage screw rod cylinder (1), wherein the outer wall of the screw rod cylinder (1) is provided with external threads, the cylinder wall is provided with a through guide groove (11), the outer wall of the screw rod cylinder (1) is provided with a shell sleeve (2), the inner wall of the shell sleeve (2) is fixed with a nut block (21), the shell sleeve (2) is engaged with the external threads of the screw rod cylinder (1) of the upper stage through the nut block (21), the shell sleeve (2) is connected with a bearing (22), the bearing (22) is provided with a connecting pin (23) which is fixedly connected with the screw rod cylinder (1) corresponding to the guide groove (11) of the screw rod cylinder (1) of the upper stage, and the shell sleeves (2) are sequentially sleeved.

2. A device as claimed in claim 1, wherein: The inner wall of the screw rod cylinder (1) is fixed with a guide pin (12), the guide pin (12) on the screw rod cylinder (1) of the upper stage of the adjacent screw rod cylinder (1) is slidingly engaged with the guide groove (11) of the screw rod cylinder (1) of the lower stage.

3. A device as claimed in claim 1, wherein: The application further comprises a driving motor (3) which is drivingly connected with the screw rod cylinder (1) of the first stage and is used for driving the screw rod cylinder (1) of the first stage to rotate.

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