CN213027704U

CN213027704U - Stroke-adjustable linear push rod motor

Info

Publication number: CN213027704U
Application number: CN202022306250.1U
Authority: CN
Inventors: 徐荣富; 朱永庆
Original assignee: Dongguan Pinfeng Electronic Technology Co ltd
Current assignee: Dongguan Pinfeng Electronic Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-04-20
Anticipated expiration: 2030-10-15

Abstract

The utility model belongs to the technical field of thrust motors, in particular to a stroke-adjustable linear push rod motor, which comprises a motor, a reduction box and a linear transmission pair, wherein the linear transmission pair is sleeved with a push pipe which passes through a tail cover; the stroke control assembly comprises a screw rod arranged in parallel with the top pipe, a control block in threaded fit with the screw rod, an electromagnetic induction switch arranged on the control block and an inductor arranged on the linear transmission pair and used for controlling the start and stop of the motor; the screw rod passes through the tail cover and is rotationally arranged on the reduction gearbox, a first wire groove limited to the linear sliding of the control block is formed in the inner wall of the outer pipe, the screw rod is rotated to adjust the distance between the electromagnetic induction switch and the inductor, and the telescopic amount of the top pipe relative to the tail cover is controlled. The utility model discloses a push pipe can carry out manual regulation for the flexible volume of this linear push rod motor, realizes the convenient installation of this linear push rod motor, and it is more nimble convenient to use, has stronger commonality, and market spreading value is high.

Description

Stroke-adjustable linear push rod motor

Technical Field

The utility model belongs to the technical field of thrust motor, especially, relate to a stroke adjustable linear push rod motor.

Background

The push rod motor is an electric driving device which converts the rotary motion of a motor into the linear reciprocating motion of a push rod. The device can be used as an execution machine in various simple or complex process flows to realize remote control, centralized control or automatic control. The electric push rod is a universal auxiliary driving device and can be widely applied to industries such as electric power, machinery, traffic, chemical engineering, hoisting, transportation, building and the like; the device has the characteristics of reliable performance, sensitive action, stable operation, same push-pull force, good environmental adaptability and the like. The working principle of the push rod motor is as follows: after the motor is decelerated by the gear, the rotary motion of the motor is changed into linear motion, and the action of a push rod is completed by utilizing the forward and reverse rotation of the motor; complex motions such as rotation, shaking and the like can be completed through various motion mechanisms such as levers, rockers or connecting rods; by changing the length of the arm of force of the push rod, the movement stroke can be increased or enlarged.

In the push rod motor in the prior art, the motion stroke of the push rod is limited by the position of the micro switch, and the motor is operated by the contact of the limit switch and the micro switch in the push rod motor. Among the current push rod motor, the switch wire casing position of installing micro-gap switch is fixed, and the drawback that this mode brought has: 1. the positions of push rod motors installed in the same batch of equipment are different, so that the positions of the push rod motors installed on the equipment need to be continuously adjusted when the push rod motors are specifically installed, time and labor are wasted, and the installation cost is high; 2. because the position of the switch wire groove of the microswitch is fixed, the movement stroke of the push rod is also fixed, so that the adjustment cannot be carried out during actual use, the use is not flexible enough, and the popularization and the use of the push rod motor are limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stroke adjustable linear push rod motor, the switch wire casing rigidity that aims at solving the push rod motor among the prior art and installs micro-gap switch leads to the push rod motion stroke fixed, can't adjust according to actual need when causing in-service use, uses not nimble enough and installs technical problem such as inconvenient.

In order to achieve the above object, an embodiment of the present invention provides a stroke-adjustable linear push rod motor, which includes a motor, a reduction box and a linear transmission pair, wherein an input end of the reduction box is connected to an electric shaft of the motor, and an output end of the reduction box is connected to the linear transmission pair; the reduction gearbox is provided with an outer pipe with one end provided with a tail cover, and the outer pipe wraps the linear transmission pair; the linear transmission pair is sleeved with a top pipe penetrating through the tail cover, and the linear transmission pair moves to drive the top pipe to make telescopic motion relative to the tail cover. The structural design realizes that the rotary motion of the motor is converted into the reciprocating linear motion of the top pipe.

Optionally, the linear push rod motor further comprises a stroke control assembly, which comprises a screw rod arranged in parallel with the push pipe, a control block in threaded fit with the screw rod, an electromagnetic induction switch arranged on the control block, and an inductor arranged on the linear transmission pair and controlling the motor to be turned on and off; the screw rod penetrates through the tail cover and is rotatably arranged on the reduction gearbox, a first wire groove limited to the linear sliding of the control block is formed in the inner wall of the outer pipe, and the screw rod is rotated to adjust the distance between the electromagnetic induction switch and the inductor so as to control the telescopic amount of the top pipe relative to the tail cover. The structure design can adjust the expansion amount of the top pipe relative to the tail cover in a manual mode according to actual conditions.

Optionally, the linear transmission pair comprises a screw rod connected with the output end of the reduction box and a screw nut in threaded fit with the screw rod, the screw nut protrudes along the radial direction to form an anti-rotation piece, and a second wire groove limited to the linear sliding of the anti-rotation piece is arranged on the inner wall of the outer tube; the inductor is arranged on the screw rod nut, and the jacking pipe is clamped at one end of the screw rod nut. The purpose of this structural design is to structurally perform the amount of telescoping of the top tube relative to the tail cap.

Optionally, the reduction gearbox is provided with a through hole for the screw rod to pass through, and a bearing is arranged in the through hole, so that the screw rod is rotatably arranged on the reduction gearbox. The purpose of the structural design is to directly arrange the end part of the screw rod in the box body of the reduction gearbox, so that the structure of the linear push rod motor is simplified.

Optionally, the reduction box includes a pinion connected to the electric shaft of the motor, a bull gear connected to the lead screw, and at least two step gears engaged with the pinion and the bull gear. The purpose of the structural design is to enhance the motion smoothness of the linear transmission pair.

Optionally, the pinion is parallel to the axis of the bull gear, and the lead screw and the motor are arranged on the same side of the reduction gearbox. The purpose of this structural design is to shorten the size of this linear push rod motor length direction for this linear push rod motor structure is compacter.

Alternatively, two of the step gears which are meshed with each other are mutually meshed and assembled in a form of opposite structures. The structure design aims to further reduce the volume of the reduction gearbox on the basis of ensuring the motion stability of the linear transmission pair, so as to reduce the occupied space of the linear push rod motor.

Optionally, a through hole for the screw rod and the top pipe to pass through is formed in the tail cover, and a sealing ring is embedded in the through hole. The structural design prevents mechanical transmission noise from leaking, and improves the silencing effect of the linear push rod motor.

Optionally, a noise reduction cover is arranged on the reduction gearbox, and the motor is accommodated in a cavity defined by the noise reduction cover and the reduction gearbox. The structure design prevents the noise of the motor from leaking, and improves the silencing effect of the linear push rod motor.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the stroke adjustable linear push rod motor have one of following technological effect at least:

1. the control block is matched with the screw in a threaded mode, the screw is manually rotated, and due to the fact that the first wire groove is formed, the control block does not rotate along with the screw, and only can do linear reciprocating motion along the first wire groove, the distance between the electromagnetic induction switch and the inductor can be manually adjusted, the telescopic quantity of the push pipe relative to the linear push rod motor can be adjusted, the defect that the movement stroke of the push rod is fixed due to the fact that the position of a switch wire groove of a push rod motor provided with a microswitch is fixed in the prior art is overcome, the telescopic quantity of the push pipe relative to the linear push rod motor can be manually adjusted, the linear push rod motor can be conveniently installed, meanwhile, the push rod motor is flexible and convenient to use, and the linear push rod motor has high universality and high market popularization value.

2. Through the structural design and the assembly mode design of the small gear, the large gear and the step gear in the reduction gearbox and the design that the screw rod and the motor are arranged on the same side of the reduction gearbox, the stability of the motion of the linear transmission pair is enhanced, the size of the linear push rod motor in the length direction is shortened, the occupied space of the linear push rod motor is reduced, and the linear push rod motor is more compact in structure.

3. The outer pipe with the tail cover at one end is wrapped on the linear transmission pair, the noise reduction cover is wrapped on the motor, and structural designs such as sealing rings are embedded in through holes in the tail cover, so that leakage of noise generated in the process of mechanical transmission and motor rotation of the linear push rod motor is reduced, and the silencing effect of the linear push rod motor is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural view of a linear push rod motor with an adjustable stroke according to an embodiment of the present invention.

Fig. 2 is a schematic view illustrating an installation of a noise reduction cover according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 labeled A;

fig. 4 is a schematic view of a partially exploded view of a linear push rod motor with adjustable stroke according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 labeled A;

fig. 6 is a schematic structural view of a linear transmission pair provided in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a gear box according to an embodiment of the present invention;

wherein, in the figures, the respective reference numerals:

10-motor, 11-noise reduction cover, 20-reduction box, 21-pinion, 22-bull gear, 23-step gear, 30-linear transmission pair, 31-lead screw, 32-lead screw nut, 321-anti-rotation piece, 40-outer tube, 41-tail cover, 411-sealing ring, 42-first wire groove, 43-second wire groove, 50-top tube, 60-stroke control component, 61-screw, 62-control block, 63-electromagnetic induction switch and 64-inductor.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1-2, a stroke-adjustable linear push rod motor is provided, which includes a motor 10, a reduction box 20 and a linear transmission pair 30; the input end of the reduction gearbox 20 is connected with the electric shaft of the motor 10, the output end of the reduction gearbox 20 is connected with the linear transmission pair 30, the motor 10 stably transmits power to the linear transmission pair 30 through the speed reduction effect of the reduction gearbox 20, and the running stability of the linear transmission pair 30 is enhanced.

Furthermore, a noise reduction cover 11 is arranged on the reduction gearbox 20, and the motor 10 is accommodated in a cavity defined by the noise reduction cover 11 and the reduction gearbox 20. The structural design prevents the noise of the motor 10 from leaking, and improves the silencing effect of the linear push rod motor.

As shown in fig. 3, the reduction box 20 is provided with an outer tube 40 with a tail cover 41 at one end, and the outer tube wraps the linear transmission pair 30; the linear transmission pair 30 is sleeved with a top pipe 50 penetrating through the tail cover 41, the linear transmission pair 30 moves to drive the top pipe 50 to do telescopic motion relative to the tail cover 41, the structural design realizes that the rotary motion of the motor is converted into the reciprocating linear motion of the top pipe 50, so that the linear push rod motor outputs linear driving force outwards, and complex actions such as rotation, shaking and the like can be completed by connecting various moving mechanisms such as levers, rockers or connecting rods. It should be noted that, by providing the outer tube 40 with the tail cap 41 at one end, the linear transmission pair 30 is wrapped, so as to prevent the noise generated by the operation of the linear transmission pair 30 from leaking, and further reduce the noise of the linear push rod motor.

As shown in fig. 4 and 5, the linear push rod motor further includes a stroke control assembly 60, which includes a screw 61 parallel to the top pipe 50, a control block 62 in threaded engagement with the screw, an electromagnetic induction switch 63 disposed on the control block, and an inductor 64 disposed on the linear transmission pair 30 and controlling the on/off of the motor 10. In this embodiment, the screw 61 passes through the tail cover 41 and is rotatably disposed on the reduction gearbox 20, and the inner wall of the outer tube 40 is provided with a first wire groove 42 limited to the linear sliding of the control block 62; specifically, the distance between the electromagnetic induction switch 63 and the inductor 64 is adjusted by manually rotating the screw 61, so as to control the expansion amount of the top pipe 50 relative to the tail cover 41. In practical operation, the motor 10 provides power for the linear transmission pair 30 to operate through the reduction box 20, the inductor 64 disposed on the linear transmission pair 30 linearly moves along with the linear transmission pair under the limit of the linear movement of the first wire slot 42, when the electromagnetic induction switch 63 is induced, the motor 10 stops working, and the expansion amount of the top pipe 50 relative to the tail cover 41 is an output amount. Therefore, aiming at different conditions, the telescopic amount of the top pipe 50 relative to the tail cover 41 is adjusted manually, the functions of stroke adjustment and fine adjustment of the linear push rod motor are realized, and the application range of the linear push rod motor is widened.

As shown in fig. 6 and 5, the linear transmission pair 30 includes a screw rod 31 connected to the output end of the reduction box 20 and a screw nut 32 in threaded engagement with the screw rod. In this embodiment, the lead screw nut 32 protrudes along a radial direction thereof to form a rotation preventing piece 321, and a second linear groove 43 limited to the linear sliding of the rotation preventing piece 321 is formed on an inner wall of the outer tube 40; the inductor 64 is disposed on the lead screw nut 32, and the top tube 50 is clamped at one end of the lead screw nut 32. Specifically, the screw rod 31 is driven by the motor 10 to rotate, and the screw rod nut 32 is inserted into the second wire groove 43 due to the rotation preventing piece 321, so that the screw rod nut 32 makes reciprocating linear movement along the second wire groove 43, and synchronous reciprocating linear movement of the top pipe 50 arranged on the screw rod nut 32 is realized.

As shown in fig. 4, the tail cover 41 is provided with a through hole for the screw 61 and the top pipe 50 to pass through. In order to prevent that mechanical transmission noise from leaking through this through-hole, improve this linear push rod motor's silence effect, the utility model discloses an embedded sealing washer 411 that is equipped with of this through-hole can realize.

As shown in fig. 7, the reduction box 20 includes a pinion 21 connected to the electric shaft of the motor 10, a bull gear 22 connected to the lead screw 31, and at least two or more step gears 23 engaged with the pinion 21 and the bull gear 22. In this embodiment, the number of the step gears 23 is three, and the motion stability of the linear transmission pair 30 is enhanced by the precise combination of the spur gears. Furthermore, the two engaged step gears 23 are engaged with each other in an opposite structure, so that the size of the reduction box 20 is further reduced on the basis of ensuring the motion stability of the linear transmission pair 30, and the occupied space of the linear push rod motor is reduced.

Further, the pinion 21 is parallel to the axis of the bull gear 22, and the lead screw 31 and the motor 10 are disposed on the same side of the reduction box 20. The purpose of this structural design is to shorten the size of this linear push rod motor length direction for this linear push rod motor structure is compacter.

Furthermore, the reduction box 20 is provided with a through hole for the screw rod 31 to pass through, and a bearing is arranged in the through hole, so that the screw rod 31 is rotatably arranged on the reduction box 20. The purpose of the structural design is to directly arrange the end part of the screw rod 31 in the box body of the reduction box 20, so that the structure of the linear push rod motor is simplified.

The utility model discloses a theory of operation does: after the linear push rod motor is arranged on equipment or a device: if the extension amount of the top pipe 50 is not enough to meet the required requirement, the screw 61 is manually adjusted by a tool to rotate anticlockwise, so that the electromagnetic induction switch 63 on the control block 62 is far away from the inductor 64, and the motion stroke of the top pipe 50 is prolonged to meet the required requirement. If the extension amount of the top pipe 50 exceeds the required requirement, the screw 61 is manually adjusted to rotate clockwise through a tool, so that the electromagnetic induction switch 63 on the control block 62 is close to the inductor 64, the movement stroke of the top pipe 50 is reduced, and the required requirement is met. And through the screw thread adjustment of the screw 61 and the control block 62, the fine adjustment of the movement stroke of the push pipe 50 can be realized, the precision of the outward output stroke of the linear push rod motor is improved, the use is more flexible and convenient, and the universality is stronger.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A stroke-adjustable linear push rod motor comprises a motor, a reduction gearbox and a linear transmission pair, wherein the input end of the reduction gearbox is connected with an electric shaft of the motor, and the output end of the reduction gearbox is connected with the linear transmission pair; the reduction gearbox is provided with an outer pipe with one end provided with a tail cover, and the outer pipe wraps the linear transmission pair; a top pipe penetrating through the tail cover is sleeved on the linear transmission pair, and the linear transmission pair moves to drive the top pipe to make telescopic motion relative to the tail cover; the method is characterized in that: the stroke control assembly comprises a screw rod arranged in parallel with the jacking pipe, a control block in threaded fit with the screw rod, an electromagnetic induction switch arranged on the control block and an inductor arranged on the linear transmission pair and used for controlling the starting and the stopping of the motor; the screw rod penetrates through the tail cover and is rotatably arranged on the reduction gearbox, a first wire groove limited to the linear sliding of the control block is formed in the inner wall of the outer pipe, and the screw rod is rotated to adjust the distance between the electromagnetic induction switch and the inductor so as to control the telescopic amount of the top pipe relative to the tail cover.

2. The stroke adjustable linear pusher motor of claim 1 further comprising: the linear transmission pair comprises a screw rod connected with the output end of the reduction box and a screw rod nut in threaded fit with the screw rod, the screw rod nut protrudes along the radial direction to form an anti-rotation piece, and a second wire groove limited in the linear sliding of the anti-rotation piece is arranged on the inner wall of the outer pipe; the inductor is arranged on the screw rod nut, and the jacking pipe is clamped at one end of the screw rod nut.

3. The stroke adjustable linear pusher motor of claim 2, further comprising: the reduction gearbox is provided with a through hole for the screw rod to pass through, and a bearing is arranged in the through hole, so that the screw rod is rotatably arranged on the reduction gearbox.

4. The stroke adjustable linear pusher motor of claim 2, further comprising: the reduction box comprises a pinion connected with the motor shaft, a bull gear connected with the screw rod and at least more than two step gears meshed with the pinion and the bull gear.

5. The stroke adjustable linear pusher motor of claim 4, wherein: the small gear is parallel to the axis of the big gear, and the screw rod and the motor are arranged on the same side of the reduction gearbox.

6. The stroke adjustable linear pusher motor of claim 4, wherein: and the two meshed step gears are mutually meshed and assembled in a form of opposite structures.

7. The stroke adjustable linear pusher motor of claim 1 further comprising: and the tail cover is provided with a through hole for the screw rod and the top pipe to pass through, and a sealing ring is embedded in the through hole.

8. The stroke adjustable linear pusher motor of claim 1 further comprising: the reduction gearbox is provided with a noise reduction cover, and the motor is accommodated in a cavity defined by the noise reduction cover and the reduction gearbox.