CN210404974U

CN210404974U - Stroke-adjustable electric push rod

Info

Publication number: CN210404974U
Application number: CN201921506122.2U
Authority: CN
Inventors: 沈功达
Original assignee: Ningbo Fenghua Runda Medical Apparatus Co ltd
Current assignee: Ningbo Fenghua Runda Medical Apparatus Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-04-24
Anticipated expiration: 2029-09-11

Abstract

The utility model discloses an electric push rod with adjustable stroke, which comprises a motor and a cylinder body, the utility model provides a cylinder body, including the cylinder body, the front shroud, back lid and push rod, the cylinder body both ends are located respectively to front shroud and back lid, the push rod activity sets up in the cylinder body, the outer end axial of push rod extend out the cylinder body outside and with front shroud sliding fit, be equipped with the screw-nut and the lead screw of looks adaptation in the push rod, be equipped with engaged worm and worm wheel in the back lid, be equipped with travel switch between push rod and the cylinder body, the last button that all is equipped with of travel switch, the last trigger body that is used for trigger button that is equipped with of screw-nut, the slide rail has been seted up on the cylinder body, be equipped with a plurality of open slots on the slide rail, be equipped with on the travel switch with slide rail sliding fit's slide, the slide passes the slide rail and extends. The utility model discloses simple structure is compact, the convenient advantage of stroke control has been possessed.

Description

Stroke-adjustable electric push rod

Technical Field

The utility model relates to an electric putter technical field, in particular to adjustable electric putter of stroke.

Background

The electric push rod is an electric driving device which converts the rotary motion of a motor into the linear reciprocating motion of the push rod, and is used as an execution machine in various simple or complex process flows so as to realize remote control, centralized control or automatic control. The motion driving unit is widely applied to the industries of household appliances, kitchen ware, medical appliances, automobiles and the like. The stroke of the electric push rod is usually positioned and controlled by adopting a stroke switch, a time relay or a stepping motor, firstly, the position of an internal adjusting mechanism adopting a stroke switch mode cannot be adjusted, and the requirements of different strokes of different use occasions cannot be met, and secondly, because the action element does not respond timely, a switch contact cannot be instantly disconnected, and the push rod is easily damaged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure is compact, the convenient adjustable electric putter of stroke is adjusted to prior art's defect and not enough.

The utility model provides a technical scheme that its technical problem adopted is: an electric push rod with adjustable stroke comprises a motor, a cylinder body, a front cover, a rear cover and a push rod, wherein the front cover and the rear cover are respectively arranged at two ends of the cylinder body in a covering manner, the push rod is movably arranged in the cylinder body, the outer end of the push rod axially extends out of the cylinder body and is in sliding fit with the front cover, a screw nut is fixed at the inner end of the push rod, a lead screw is arranged in the push rod and is matched with the screw nut, a worm wheel is fixed at the end part of the lead screw, a worm meshed with the worm wheel is arranged in the rear cover, the worm is fixedly connected with the output end of the motor, a cavity is formed between the push rod and the cylinder body in a matching manner, two stroke switches are axially distributed in the cavity, buttons are arranged on the stroke switches, a trigger body for triggering the buttons is arranged on the screw nut, and the stroke switches are, the cylinder body is last to have seted up the slide rail along the axial, be equipped with a plurality of open slots on the slide rail, travel switch be last be equipped with slide rail sliding fit's slide, the slide passes the slide rail and extends to the cylinder body outside, the cylinder body outside be equipped with slide articulated latch segment, the tip of latch segment with open slot locking cooperation, the latch segment with it is equipped with reset spring to support between the travel switch.

Furthermore, the latch segment is including being integrative locking portion, articulated portion and pressing the splenium that sets up, articulated portion set up in the latch segment is middle, locking portion with pressing the splenium set up respectively in the latch segment both ends.

Furthermore, the locking part is in a barb shape and is in locking fit with the open slot.

Furthermore, a main hole is formed in the hinged portion, an auxiliary hole matched with the main hole is formed in the sliding seat, a bolt penetrates through the main hole and the auxiliary hole, and the locking block rotates around the bolt to be hinged with the travel switch.

Furthermore, the diameter of the bolt is greater than the width of the open slot, and the length of the bolt is greater than the width of the slide rail, so that the installation of the locking block is facilitated.

Furthermore, one end of the reset spring is abutted to the pressing part, and the other end of the reset spring penetrates through the sliding rail to be abutted to the travel switch.

Furthermore, the outer end of the push rod is provided with a first through hole, so that the electric push rod is conveniently installed on a part needing to be driven.

Furthermore, the rear cover is covered with an end cover, and the end cover is provided with a second through hole, so that the electric push rod is conveniently installed on a part needing to be driven.

Furthermore, two bearings are arranged in the rear cover, the outer rings of the bearings are fixed with the rear cover, and the inner rings of the bearings are respectively fixed with the two ends of the worm wheel, so that the movement stability is improved.

The utility model has the advantages that: two travel switches are axially distributed in a cavity formed between the push rod and the cylinder body, the travel switches are respectively provided with a button, a lead screw nut is provided with a trigger body used for triggering the button, the travel switches are electrically connected with a motor, the cylinder body is axially provided with a slide rail, the slide rail is provided with a plurality of open slots, the travel switches are provided with slide seats in sliding fit with the slide rails, the slide seats penetrate through the slide rails and extend to the outer side of the cylinder body, the outer side of the cylinder body is provided with a locking block hinged with the slide seats, the end parts of the locking blocks are in locking fit with the open slots, and a reset spring is arranged between; when the stroke is adjusted, the locking block is pressed to enable the end part of the locking block to be separated from the open slot, so that the stroke switch is unlocked, the locking block is pushed at the moment, so that the stroke switch slides on the slide rail until the stroke switch slides to a proper position, so that the stroke of the push rod is changed, the pressing is released at the moment, and the end part of the locking block is locked and matched with the open slot again under the elastic force of the reset spring, so that the stroke adjusting device has the advantage of convenience in stroke adjustment; generally, the utility model discloses simple structure is compact, the convenient advantage is adjusted to the stroke has been possessed.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is a sectional schematic view in another direction of the present invention.

Fig. 4 is an enlarged schematic view at a in fig. 3.

Fig. 5 is a schematic view of the lead screw nut of the present invention.

Shown in the figure: 1-a motor; 2-cylinder body; 21-a slide rail; 22-open slots; 3-front cover; 4-rear cover; 5-a push rod; 51-a first via; 6-lead screw nut; 61-a trigger; 7-a lead screw; 8-a worm gear; 9-a worm; 10-a cavity; 11-a travel switch; 111-a slide; 112-secondary hole; 12-a locking block; 121-a locking part; 122-a hinge; 123-a pressing part; 124-main hole; 13-a return spring; 14-a latch; 15-end cap; 151-second via; 16-bearing.

Detailed Description

For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:

as shown in fig. 1 to 5, an electric push rod with adjustable stroke comprises a motor 1, a cylinder body 2, a front cover 3, a rear cover 4 and a push rod 5, wherein the front cover 3 and the rear cover 4 are respectively covered at two ends of the cylinder body 2, the push rod 5 is movably arranged in the cylinder body 2, the outer end of the push rod 5 axially extends out of the cylinder body 2 and is in sliding fit with the front cover 3, a screw nut 6 is fixed at the inner end of the push rod 5, a screw 7 is arranged in the push rod 5, the screw 7 is matched with the screw nut 6, a worm wheel 8 is fixed at the end of the screw 7, a worm 9 meshed with the worm wheel 8 is arranged in the rear cover 4, the worm 9 is fixedly connected with the output end of the motor 1, a cavity 10 is formed between the push rod 5 and the cylinder body 2 in a matching manner, two stroke switches 11 are axially distributed in the cavity 10, buttons are respectively arranged on the stroke switches 11, a trigger, the cylinder body 2 is provided with a slide rail 21 along the axial direction, the slide rail 21 is provided with a plurality of open slots 22, the travel switch 11 is provided with a slide seat 111 in sliding fit with the slide rail 21, the slide seat 111 penetrates through the slide rail 21 and extends to the outer side of the cylinder body 2, the outer side of the cylinder body 2 is provided with a locking block 12 hinged with the slide seat 111, the end part of the locking block 12 is in locking fit with the open slot 22, and a reset spring 13 is arranged between the locking block 12 and the travel switch 11 in a.

Preferably, one of them travel switch 11 is conventional type, fixes the extreme end at push rod 5 one end, and another travel switch 11 is the utility model discloses a style, with slide rail 21 sliding fit, through adjusting the position of this travel switch 11 on slide rail 21 that slides to the extreme end of the change push rod 5 other end, adjusted this electric putter's stroke from this.

As shown in fig. 4, the locking block 12 includes a locking portion 121, a hinge portion 122 and a pressing portion 123, which are integrally formed, the hinge portion 122 is disposed in the middle of the locking block 12, and the locking portion 121 and the pressing portion 123 are respectively disposed at two ends of the locking block 12; the locking portion 121 is in the shape of a barb and is in locking engagement with the open slot 22.

The hinge part 122 is provided with a main hole 124, the sliding seat 111 is provided with an auxiliary hole 112 matched with the main hole 124, the bolt 14 penetrates through the main hole 124 and the auxiliary hole 112, and the locking block 12 rotates around the bolt 14 to realize the hinge joint with the travel switch 11; the diameter of the bolt 14 is larger than the width of the open slot 22, and the length of the bolt 14 is larger than the width of the slide rail 21.

One end of the return spring 13 abuts against the pressing portion 123, and the other end of the return spring 13 passes through the slide rail 21 and abuts against the travel switch 11.

The outer end of the push rod 5 is provided with a first through hole 51; the end cover 15 is arranged on the rear cover 4, the second through hole 151 is arranged on the end cover 15, and the first through hole 51 and the second through hole 151 are arranged corresponding to a workpiece or a component needing to be driven.

Two bearings 16 are arranged in the rear cover 4, the outer rings of the bearings 16 are fixed with the rear cover 4, and the inner rings of the bearings 16 are respectively fixed with two ends of the worm wheel 8.

The utility model discloses a concrete theory of operation as follows: when the stroke needs to be adjusted, the pressing portion 123 of the locking block 12 is pressed to enable the locking block 12 to rotate around the bolt 14, at this time, the locking portion 121 is separated from the opening groove 22, so that the stroke switch 11 is unlocked, at this time, the locking block 12 is pushed, the stroke switch 11 slides on the sliding rail 21 until the stroke switch 11 slides to a proper position, so that the relative position of the stroke switch 11 is changed, the operable range of the trigger body 61 on the lead screw nut 6 is changed, so that the stroke of the push rod 5 is changed, at this time, the pressing portion 123 is released from being pressed, and the locking portion 121 and the opening groove 22 are locked and matched again by the locking block 12 under the elastic force of the return spring 13, so that the position of the stroke switch 11 is fixed, and sliding is not generated.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. An electric push rod with an adjustable stroke comprises a motor (1), a cylinder body (2), a front cover (3), a rear cover (4) and a push rod (5), wherein the front cover (3) and the rear cover (4) are respectively arranged at two ends of the cylinder body (2), the push rod (5) is movably arranged in the cylinder body (2), the outer end of the push rod (5) axially extends out of the cylinder body (2) and is in sliding fit with the front cover (3), a screw nut (6) is fixed at the inner end of the push rod (5), a lead screw (7) is arranged in the push rod (5), the lead screw (7) is matched with the screw nut (6), a worm wheel (8) is fixed at the end part of the lead screw (7), a worm (9) meshed with the worm wheel (8) is arranged in the rear cover (4), and the worm (9) is fixedly connected with the output end of the motor (1), the method is characterized in that: push rod (5) with the cooperation is formed with cavity (10) between cylinder body (2), follow two travel switch (11) of axial distribution in cavity (10), all be equipped with the button on travel switch (11), be equipped with on screw nut (6) and be used for triggering trigger body (61) of button, travel switch (11) all with motor (1) electric connection, slide rail (21) have been seted up along the axial on cylinder body (2), be equipped with a plurality of open slots (22) on slide rail (21), be equipped with on travel switch (11) with slide rail (21) sliding fit's slide (111), slide (111) pass slide rail (21) and extend to the cylinder body (2) outside, the cylinder body (2) outside be equipped with slide (111) articulated latch segment (12), the tip of latch segment (12) with open slot (22) locking fit, and a return spring (13) is arranged between the locking block (12) and the travel switch (11) in a propping manner.

2. The stroke adjustable power putter of claim 1, wherein: the locking block (12) comprises a locking part (121), a hinge part (122) and a pressing part (123) which are integrally arranged, the hinge part (122) is arranged in the middle of the locking block (12), and the locking part (121) and the pressing part (123) are respectively arranged at two ends of the locking block (12).

3. The stroke adjustable power putter of claim 2, wherein: the locking part (121) is in a barb shape and is in locking fit with the open slot (22).

4. The stroke adjustable power putter of claim 2, wherein: the hinge portion (122) is provided with a main hole (124), the sliding seat (111) is provided with an auxiliary hole (112) matched with the main hole (124), a bolt (14) penetrates through the main hole (124) and the auxiliary hole (112), and the locking block (12) rotates around the bolt (14) to realize the hinge connection with the travel switch (11).

5. The stroke adjustable power putter of claim 4, wherein: the diameter of the bolt (14) is larger than the width of the open slot (22), and the length of the bolt (14) is larger than the width of the sliding rail (21).

6. The stroke adjustable power putter of claim 2, wherein: one end of the return spring (13) abuts against the pressing part (123), and the other end of the return spring (13) penetrates through the sliding rail (21) to abut against the travel switch (11).

7. The stroke adjustable power putter of claim 1, wherein: the outer end of the push rod (5) is provided with a first through hole (51).

8. The stroke adjustable power putter of claim 7, wherein: an end cover (15) is arranged on the upper cover of the rear cover (4), and a second through hole (151) is formed in the end cover (15).

9. The stroke adjustable power putter of claim 1, wherein: two bearings (16) are arranged in the rear cover (4), the outer rings of the bearings (16) are fixed with the rear cover (4), and the inner rings of the bearings (16) are respectively fixed with the two ends of the worm wheel (8).