Manual release structure of electric push rod

Abstract

The utility model relates to the technical field of electric push rods, and discloses an electric push rod manual release structure which comprises a first linkage shaft in transmission connection with a driving motor and a second linkage shaft in transmission connection with a lead screw transmission mechanism. The first linkage shaft and the second linkage shaft are in transmission connection through an inner gear shaft, and the inner gear shaft is connected with a separation mechanism used for disconnecting transmission of the first linkage shaft and the second linkage shaft. The inner gear shaft can be manually controlled through the separating mechanism to disconnect transmission between the first linkage shaft and the second linkage shaft, so that transmission between the driving motor and the lead screw transmission mechanism is separated, the electric push rod can still achieve the contraction action of the inner pipe under the condition of power failure, and the electric push rod is simple in structural design, reliable in work, high in practicability, suitable for application and popularization and suitable for popularization and application. The problem that the electric push rod cannot realize the contraction action of the inner pipe under the condition of power failure is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric push rod, specifically, relate to electric push rod manual release structure. BACKGROUND

[0002] Electric push rod is a kind of electric power drive device that the rotary motion of motor is changed into the linear reciprocating motion of push rod. Column type electric push rod is general type auxiliary drive device, can be used as execution machine to realize remote control, centralized control or automatic control.

[0003] The electric push rod generally used in medical instruments or household appliances includes a shell, a driving motor, a screw rod transmission mechanism, a travel switch, an inner tube and an outer tube. The screw rod transmission mechanism drives the inner tube to perform linear extension and contraction relative to the outer tube under the driving of the driving motor, to realize the pushing function.

[0004] The existing electric push rod cannot realize the inner tube contraction action under power failure. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing electric push rod manual release structure, to solve the problem that electric push rod cannot realize the inner tube contraction action under power failure in prior art.

[0006] The utility model is realized in this way, electric push rod manual release structure, including with the driving motor transmission connection's first linkage shaft and with the screw rod transmission mechanism transmission connection's second linkage shaft, the first linkage shaft with second linkage shaft between longitudinal relative arrangement, the first linkage shaft with second linkage shaft between through the inner tooth shaft transmission connection, the inner tooth shaft is connected with the separation mechanism for disconnecting the first linkage shaft and second linkage shaft transmission.

[0007] Further, the separation mechanism includes a wrench, a loosening end and a loosening shaft, the wrench and the loosening shaft are connected through the loosening end, and the upper and lower ends of the loosening shaft are respectively in movable abutment with the loosening end and the inner tooth shaft.

[0008] Further, the loosening end includes a loosening upper end cover, a loosening lower end cover and a first spring, the first spring is sleeved on the outer periphery of the upper part of the loosening shaft, the loosening upper end cover is located above the loosening lower end cover, the loosening upper end cover and the loosening lower end cover are connected through the first spring sleeve, the wrench is rotatably connected with the loosening lower end cover through the loosening upper end cover, and the loosening lower end cover and the loosening upper end cover are respectively sleeved on the upper part of the loosening shaft, and the loosening upper end cover and the loosening lower end cover are longitudinally arranged.

[0009] Further, the first gear slot with a bottom opening in the first linkage shaft, the second gear slot with a top opening in the second linkage shaft, the second gear slot and the first gear slot form a rotating cavity, the inner tooth shaft is engaged with the rotating cavity, the second spring connected to the inner tooth shaft is arranged in the rotating cavity;

[0010] The upper and lower ends of the inner tooth shaft are respectively in movable abutment with the loosening shaft and the second spring.

[0011] Further, along the direction from bottom to top, the positioning shaft is arranged in the second linkage shaft, the top end of the positioning shaft penetrates the inner tooth shaft from bottom to top and is arranged in the loosening shaft.

[0012] Further, the second spring is arranged on the outer periphery of the positioning shaft.

[0013] Further, the first outer gear is arranged on the outer periphery of the first linkage shaft, the first outer gear is engaged with the driving motor, the second outer gear is arranged on the outer periphery of the second linkage shaft, and the second outer gear is engaged with the screw transmission mechanism.

[0014] Further, the first outer gear and the second outer gear are arranged in longitudinal opposite spacing, the bottom of the first linkage shaft is arranged in the top of the second linkage shaft, and the outer side wall of the first linkage shaft and the inner side wall of the second linkage shaft are arranged in spacing.

[0015] Further, the second linkage shaft has a limiting groove recessed inward in the top, the limiting groove is arranged in a ring shape, and the bottom of the first linkage shaft is arranged in the limiting groove.

[0016] Further, bearings are arranged on the outer periphery of the first linkage shaft and the outer periphery of the second linkage shaft respectively.

[0017] Compared with the prior art, the manual release structure of the electric push rod can manually control the inner tooth shaft to disconnect the first linkage shaft and the second linkage shaft from driving, so as to disconnect the driving between the driving motor and the screw transmission mechanism, so that the electric push rod can still realize the contraction action of the inner tube in the case of power failure. The structure is simple in design, reliable in work, high in practicability, and suitable for popularization and use, and solves the problem that the electric push rod cannot realize the contraction action of the inner tube in the case of power failure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a three-dimensional schematic view of the manual release structure of the electric push rod provided by the utility model;

[0019] Figure 2 is an exploded three-dimensional schematic view of the manual release structure of the electric push rod provided by the utility modelFigure One ;

[0020] Figure 3 is the exploded perspective view of the manual release structure of the electric push rod provided by the utility model Figure Two ;

[0021] Figure 4 is the sectional structure schematic view of the manual release structure of the electric push rod provided by the utility model.

[0022] In the figure: first linkage shaft 10, second linkage shaft 20, inner tooth shaft 30, separation mechanism 40, rotating cavity 50, driving motor 60, screw rod transmission mechanism 70, first external gear 11, second external gear 21, positioning shaft 22, bearing 23, second spring 31, wrench 41, loosening end 42, loosening shaft 43, loosening upper end cover 421, loosening lower end cover 422, first spring 423. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0024] The implementation of the utility model is described in detail below by combining with specific examples.

[0025] The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the utility model, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the utility model, for ordinary skilled persons in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] Referring to Figures 1-4 , a preferred embodiment provided by the utility model is shown.

[0027] The manual release structure of the electric push rod comprises a first linkage shaft 10 in transmission connection with a driving motor 60 and a second linkage shaft 20 in transmission connection with a screw rod transmission mechanism 70, the first linkage shaft 10 and the second linkage shaft 20 are arranged longitudinally opposite to each other, the first linkage shaft 10 and the second linkage shaft 20 are in transmission connection through an inner tooth shaft 30, and the inner tooth shaft 30 is connected with a separation mechanism 40 for disconnecting the transmission of the first linkage shaft 10 and the second linkage shaft 20.

[0028] The electric push rod manual release structure provided above can manually control the inner tooth shaft 30 to disconnect the first linkage shaft 10 and the second linkage shaft 20 through the separation mechanism 40, so as to disconnect the transmission between the driving motor 60 and the screw rod transmission mechanism 70, so that the electric push rod can still realize the contraction action of the inner tube in the case of power failure. The structure is simple in design, reliable in work, strong in practicality, and suitable for popularization and use, and solves the problem that the electric push rod cannot realize the contraction action of the inner tube in the case of power failure.

[0029] In the embodiment, the separation mechanism 40 includes a wrench 41, a release end 42, and a release shaft 43. The wrench 41 and the release shaft 43 are connected through the release end 42. The upper and lower ends of the release shaft 43 are respectively in active abutment with the release end 42 and the inner tooth shaft 30.

[0030] The wrench 41 is manually controlled to rotate, so that the wrench 41 applies pressure to the release shaft 43 through the release end 42, so that the release shaft 43 drives the inner tooth shaft 30 to separate from the first linkage shaft 10 or the release shaft 43 drives the inner tooth shaft 30 to separate from the second linkage shaft 20, thereby achieving the disconnected transmission of the first linkage shaft 10 and the second linkage shaft 20.

[0031] In the embodiment, the release end 42 includes a release upper end cover 421, a release lower end cover 422, and a first spring 423. The first spring 423 is sleeved on the upper outer periphery of the release shaft 43. The release upper end cover 421 is located above the release lower end cover 422. The release upper end cover 421 and the release lower end cover 422 are connected through the first spring 423. The wrench 41 is rotationally connected with the release lower end cover 422 through the release upper end cover 421. The release lower end cover 422 and the release upper end cover 421 are respectively sleeved on the upper part of the release shaft 43. The release upper end cover 421 and the release lower end cover 422 are longitudinally arranged.

[0032] The release upper end cover 421 is rotated by the wrench 41, so that the release upper end cover 421 applies pressure to the release lower end cover 422, so that the release lower end cover 422 drives the release shaft 43 to move towards the inner tooth shaft 30. When the inner tooth shaft 30 is reset, the release end 42 drives the release upper end cover 421 to reset through the first spring 423.

[0033] In the embodiment, the first linkage shaft 10 has a first gear slide groove with a bottom opening. The second linkage shaft 20 has a second gear slide groove with a top opening. The second gear slide groove and the first gear slide groove form a rotating cavity 50. The inner tooth shaft 30 is engaged with the rotating cavity 50. The inner tooth shaft 30 is connected with a second spring 31 for driving the inner tooth shaft 30 to reset. The second spring 31 is located in the rotating cavity 50.

[0034] The upper and lower ends of the inner tooth shaft 30 are respectively in active abutment with the release shaft 43 and the second spring 31.

[0035] The rotating cavity 50 is provided with a tooth groove matched with the inner tooth shaft 30, and the inner tooth shaft 30 drives the rotating cavity 50 to rotate through the tooth groove, thereby realizing the transmission work of the first linkage shaft 10 and the second linkage shaft 20.

[0036] In the embodiment, the positioning shaft 22 penetrates the second linkage shaft 20 in the downward direction, the top end of the positioning shaft 22 penetrates the inner tooth shaft 30 from bottom to top, and is inserted in the loosening shaft 43.

[0037] The inner tooth shaft 30 can be vertically limited in the rotating cavity 50 through the positioning shaft 22, so as to prevent the inner tooth shaft 30 from shaking during the upward and downward movement.

[0038] In the embodiment, the second spring 31 is sleeved on the outer periphery of the positioning shaft 22. The top of the second spring 31 abuts against the bottom of the inner tooth shaft 30, so that the inner tooth shaft 30 can be driven to reset by the second spring 31, and the first linkage shaft 10 and the second linkage shaft 20 are transmission connected.

[0039] The outer periphery of the first linkage shaft 10 is provided with the first outer gear 11 matched with the driving motor 60, and the outer periphery of the second linkage shaft 20 is provided with the second outer gear 21 matched with the screw transmission mechanism 70.

[0040] In the embodiment, the first outer gear 11 and the second outer gear 21 are longitudinally arranged in opposite directions, the bottom of the first linkage shaft 10 is inserted in the top of the second linkage shaft 20, and the outer side wall of the first linkage shaft 10 is arranged in the inner side wall of the second linkage shaft 20 in a spaced manner, so that the rotation between the first linkage shaft 10 and the second linkage shaft 20 does not affect each other when the first linkage shaft 10 and the second linkage shaft 20 are disconnected.

[0041] In the embodiment, the top of the second linkage shaft 20 has a limiting groove recessed inward, the limiting groove is arranged in a ring shape, and the bottom of the first linkage shaft 10 is located in the limiting groove. In this way, the positioning rotation between the first linkage shaft 10 and the second linkage shaft 20 can be increased.

[0042] In the embodiment, the outer periphery of the first linkage shaft 10 and the outer periphery of the second linkage shaft 20 are respectively sleeved with the bearing 23. In this way, the rotation of the first linkage shaft 10 and the second linkage shaft 20 is facilitated.

[0043] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A motorized push rod manual release structure characterized by, The first linkage shaft is in driving connection with the driving motor, and the second linkage shaft is in driving connection with the screw transmission mechanism.

2. The electrically powered push rod manual release structure of claim 1, wherein, The separation mechanism comprises a wrench and a loosening end, and a loosening shaft.

3. The electrically powered push rod manual release structure of claim 2, wherein, The loosening end comprises a loosening upper end cover and a loosening lower end cover, and a first spring.

4. The electrically powered push rod manual release structure of claim 3, wherein, The first linkage shaft has a first gear sliding groove with a bottom opening. The second linkage shaft has a second gear sliding groove with a top opening.

5. The electrically powered push rod manual release structure of claim 4, wherein, The second gear sliding groove and the first gear sliding groove form a rotating cavity.

6. The electrically powered push rod manual release structure of claim 5, wherein, The inner gear shaft is in meshing connection with the rotating cavity.

7. The electrically powered push rod manual release structure of any one of claims 1 to 6, wherein, The inner gear shaft is in active abutment with the loosening shaft and the second spring.

8. The electrically powered push rod manual release structure of claim 7, wherein, In a downward direction, the second linkage shaft has a positioning shaft penetrating therethrough.

9. The electrically powered push rod manual release structure of claim 8, wherein, The top end of the positioning shaft penetrates the inner gear shaft from bottom to top and is inserted into the loosening shaft.

10. The electrically powered push rod manual release structure of any one of claims 1 to 6, wherein, The second spring is sleeved on the outer periphery of the positioning shaft. The outer periphery of the first linkage shaft is provided with a first outer gear. The outer periphery of the second linkage shaft is provided with a second outer gear. The first outer gear and the second outer gear are longitudinally opposite and spaced apart. The bottom of the first linkage shaft is inserted into the top of the second linkage shaft. The outer side wall of the first linkage shaft is spaced apart from the inner side wall of the second linkage shaft. The top of the second linkage shaft has a limiting groove recessed inward. The limiting groove is annularly arranged. The outer periphery of the first linkage shaft and the outer periphery of the second linkage shaft are respectively sleeved with bearings.

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