CN218868038U - Electric push rod with adjustable stroke and installation - Google Patents

Abstract

The utility model belongs to the technical field of electric putter, concretely relates to stroke, installation adjustable electric putter, which comprises a motor, the worm wheel, the lead screw, the ejector sleeve, the sleeve pipe, the worm wheel is equipped with the box outward, the motor is fixed on the box, the motor shaft extends to in the box and meshes with the worm wheel, the cover is equipped with the nut on the lead screw, the nut is connected with the ejector sleeve, the intraductal spout that is equipped with along the push rod axial that is equipped with of sleeve, be equipped with limit element on the stroke board, be equipped with on the nut and trigger limit element and continue the switch contact spare along the current direction motion with the restriction push rod, still be equipped with the locating piece on the stroke board, be equipped with the set screw that extends to the cover outside of tubes on the locating piece, be equipped with the stroke slotted hole that cooperation set screw passed on the sleeve pipe, the stroke slotted hole is along the axial rectangular shape hole of push rod, the cover outside of tubes is equipped with the compact heap of being connected with set screw, electric putter's output stroke, the installation is adjustable, thereby the use effect is improved, production and use cost are reduced.

Description

Electric push rod with adjustable stroke and installation

Technical Field

The utility model belongs to the technical field of electric putter, concretely relates to stroke, installation adjustable electric putter.

Background

The electric push rod is an electric driving device which converts the rotation motion of a motor into the linear reciprocating motion of the push rod, and is widely used as an execution machine in scenes such as sofas, beds, automobile seats and the like, or used as an execution machine in other scenes or fields to realize remote control, centralized control or automatic control. The electric push rod generally comprises a motor, a worm wheel, a screw rod, a nut and the like.

The traditional stroke control of the electric push rod is to fixedly install two micro switches at corresponding positions according to the fixed length of the push rod stroke to respectively control the on-off of a power supply when the push rod runs to the front dead center position and the rear dead center position. The stroke and installation controlled by the device are fixed in length and cannot be adjusted, and the requirement of a client on adjusting the stroke and installation of the push rod within a certain range is difficult to meet. In daily use, the electric push rods with different stroke lengths are independently designed according to the actual installation scene and the length requirement, so that the use cost is high. Therefore, an electric push rod which can be used in different length requirement environments, has adjustable stroke and installation and is convenient to adjust is needed to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned defect, provide stroke, installation adjustable electric putter, electric putter's output stroke, the adjustable of installation, controllable have improved the result of use, reduction in production and use cost.

The utility model provides a technical scheme that its technical problem adopted as follows:

stroke, installation adjustable electric putter, including motor, worm wheel, lead screw, the cover establish the nut outside the lead screw, the cover establishes the sleeve pipe outside the nut, and the worm wheel setting is equipped with the box outside lead screw one end and lead screw meshing, the worm wheel, and the motor is fixed on the box, and the motor shaft extends to and meshes with the worm wheel in the box, the cover is equipped with the nut on the lead screw, the nut is connected with the push rod, the intraductal spout that is equipped with along the push rod axial that is equipped with of cover, be equipped with spacing component on the stroke board, be equipped with on the nut and trigger spacing component in order to restrict the push rod and continue the switch contact piece along current direction motion, still be equipped with the locating piece on the stroke board, be equipped with the set screw who extends to the cover outside of tubes on the locating piece, be equipped with the stroke slotted hole that cooperation set screw passed on the sleeve pipe, the stroke slotted hole is along the axial rectangular shape hole of push rod, the cover outside tubes is equipped with the compact heap that is connected with set screw, and compact heap location compact and realize spacing component's rigidity on the sleeve pipe outer wall.

Furthermore, the limiting element and the positioning block are distributed at two ends of the stroke plate.

Furthermore, an embedding groove for installing a limiting element is arranged on the stroke plate, a flange protruding upwards and/or downwards is arranged at the end part of the stroke plate, the flange is embedded into the sliding groove and is in sliding fit with the sliding groove, and the inner side of the flange and the groove opening of the sliding groove are not in contact with the positioning block and the limiting element.

Furthermore, the switch contact piece comprises a connecting part connected with the nut and a trigger plate extending towards one side close to the limiting element, the connecting part and the trigger plate are of an integrated structure, the top end of the limiting element is provided with a spherical contact, the end faces of the two opposite sides of the trigger plate and the contact are inclined or slope surfaces, the outer end of the trigger plate close to the sleeve is embedded into a guide groove arranged inside the sleeve, and the guide groove is axially arranged along the push rod.

Furthermore, connecting portion are the C type, and connecting portion have elasticity, set up the spread groove with connecting portion joint on the nut.

Furthermore, an upper protrusion is arranged at the upper end of the trigger plate, and the upper protrusion is attached to an inner protrusion arranged inside the sleeve to limit the position of the trigger plate in the sleeve.

Furthermore, the connecting part and the trigger plate are of an integrated structure, and the limiting element is a microswitch.

Furthermore, the upper portion of the positioning block is provided with a protruding block protruding towards the inner wall of the sleeve, the inner wall of the sleeve is provided with a protruding block groove in sliding fit with the protruding block, and the protruding block groove is axially arranged along the push rod.

Furthermore, an inner convex block embedded into the sliding groove is arranged inside the pressing block close to the sleeve, and the positioning screw penetrates through the pressing block and the inner convex block from outside to inside to be in threaded fit with the positioning block.

Furthermore, the stroke plate comprises a front stroke plate and a rear stroke plate, the limiting element comprises a front limiting element and a rear limiting element which are fixed on the front stroke plate and the rear stroke plate correspondingly, the positioning block comprises a front positioning block and a rear positioning block which correspond to the front stroke plate and the rear stroke plate, and the pressing block comprises a front pressing block and a rear pressing block which correspond to the front stroke plate and the rear stroke plate.

The utility model has the advantages that: by adopting the above scheme, the position of promotion stroke board in the cover that can be convenient through the compact heap, thereby the position of the spacing original paper of adjustment, the electric putter output stroke has been realized, the adjustment of installation, moreover, the steam generator is simple in structure, the adjustment is convenient, in stroke board sliding range, can realize the output stroke of multiple specification, installation control, thereby need not be according to different output strokes, the design, the electric putter that the production specification is different, apparent reduction production and use cost, through the adjustment of preceding stroke board, realize the adjustment of electric putter initial position, through the adjustment of back stroke board, realized the accurate control to electric putter output stroke, the installation, general structure, output stroke, installation adjustment is convenient, electric putter's result of use has been improved.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of the present invention after the casing is hidden.

Fig. 3 is a schematic view of the matching position of the front stroke plate, the rear stroke plate and the push rod in the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a switch contact according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional structure diagram of a matching portion between the front pressing block and the sleeve in an embodiment of the present invention.

Fig. 6 is a schematic view of a cross-sectional structure of a matching portion of a front stroke plate and a sleeve in an embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a sleeve according to an embodiment of the present invention.

Wherein: 1 is a sleeve, 2 is a screw rod, 3 is a nut, 4 is a push rod, 5 is a front stroke plate, 51 is a flange, 6 is a front limit element, 7 is a front positioning block, 71 is a lug, 8 is a rear stroke plate, 9 is a rear limit element, 10 is a rear positioning block, 11 is a chute, 12 is a front pressing block, 13 is a rear pressing block, 14 is a front positioning screw, 15 is a front moving Cheng Caokong, 16 is a rear stroke slot hole, 17 is an opening Guan Chujian, 171 is a connecting part, 172 is a trigger plate, 173 is a protrusion, 18 is a guide groove, 181 is a protrusion, 19 is a lug groove,

101 is a screw cavity, 102 is an adjustment cavity, 103 is an upper protrusion, 104 is a lower protrusion, 1041 is a first inner groove, and 1042 is a second inner groove.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1: referring to fig. 1 and 2, the stroke and installation adjustable electric push rod comprises a motor, a worm gear, a lead screw, a push rod sleeved outside the lead screw, a sleeve sleeved outside the push rod, a worm gear sleeve arranged at one end of the lead screw and meshed with the lead screw, a box body arranged outside the worm gear, the motor fixed on the box body, a motor shaft extending into the box body and meshed with the worm gear, one end of the sleeve 1 connected with the box body, a nut 3 sleeved on the lead screw 2, the nut 3 connected with a push rod 4, the rotation of the motor transmitted to the lead screw 2 through the worm gear to rotate the lead screw 2, and the nut 3 axially reciprocates on the lead screw 2, so that the reciprocating linear motion of the push rod 4 is realized.

Referring to fig. 3, a sliding groove 11 along the axial direction of the push rod 4 is formed in the sleeve 1, two independent front stroke plates 5 and rear stroke plates 8 are arranged in the sliding groove 11, a front limiting element 6 and a front positioning block 7 are arranged on the front stroke plates 5, a rear limiting element 9 and a rear positioning block 10 are arranged on the rear stroke plates 8, as a preferred embodiment, the front limiting element 6 and the front positioning block 7 are distributed at two ends of the front stroke plates 5, the structure of the rear stroke plates 8 is the same as that of the front stroke plates 5, a front pressing block 12 and a rear pressing block 13 are arranged on the outer wall of the sleeve 1, the front pressing block 12 is connected with the front positioning block 7 through a front positioning screw 14, the rear pressing block 12 is connected with the rear positioning block 8 through a rear positioning screw, correspondingly, a front positioning screw 14 and a rear positioning screw matched with the front positioning screw Cheng Caokong and a rear stroke slot 16 are arranged on the tube wall of the sleeve 1, the front pressing block 3262 zxft 3215 and the rear stroke slot 16 are long holes along the axial direction of the push rod 1, the push rod 12, the rear pressing block 13 can respectively push rod 5, the sleeve 6 and the rear stroke limiting element can be controlled by a simple structure, thereby realizing the simple structure of the push rod.

Referring to fig. 4, a switch contact 17 is disposed on a nut 3, the switch contact 17 includes a C-shaped connecting portion 171, a trigger plate 172 extending from the connecting portion 171 to a side close to a limit element, the connecting portion 171 and the trigger plate 172 are of an integral structure, the C-shaped connecting portion 171 has elasticity, a connecting groove matched with the connecting portion 171 is disposed on the nut 3, the connecting portion 171 is clamped into the connecting groove to realize connection of the connection Guan Chujian with the nut 3, when the nut 3 pushes a push rod 4 to move, the switch contact 17 moves synchronously, as a preferred embodiment, the front limit element 6 and the rear limit element 9 both adopt microswitches of the same structure, a trigger point of the microswitches is of a spherical structure, end faces of the trigger plate 172 opposite to the contact are inclined or sloping faces, so as to press the contact downward when in contact, the contact triggers the microswitches, the outer end of the trigger plate 172 close to the sleeve 1 is embedded into a guide groove 18 disposed inside the sleeve 1, the guide groove 18 is disposed axially along the push rod 4, the inner end of the switch contact 17 is embedded into the guide groove 18, the outer end of the microswitches are embedded into the guide 17, the microswitches are formed circumferentially and the microswitch, the effective control of the microswitch, and the accurate installation of the push rod is achieved.

Specifically, referring to fig. 5 and 6, in order to further ensure the position stability of the switch contact 17 and enable the switch contact 17 to reciprocate only in the axial direction of the push rod, an upper protrusion 173 is provided at the upper end of the trigger plate 172, and the upper protrusion 173 abuts against an end surface of an inner protrusion 181 provided inside the sleeve 1 to limit the position of the trigger plate 172 inside the sleeve 1, so that the position stability of the switch contact 17 is improved and the switch contact 17 can reciprocate only in the axial direction of the push rod.

The front stroke plate 5 is provided with an embedding groove for installing the front limiting element 6, so that the assembly operation is convenient, two side end parts of the front stroke plate 5 are provided with flanges 51 protruding upwards, the flanges 51 are embedded into the sliding groove 11 and are in sliding fit with the sliding groove 11, the inner sides of the flanges 51, the groove opening of the sliding groove 11 is not contacted with the front positioning block 7 and the front limiting element 6, so that the friction interference of the front positioning block 7 and the front limiting element 6 on the sliding of the front stroke plate 5 is avoided, and lubricating grease can be stored in gaps between the inner sides of the flanges 51 and the front positioning block 7 and between the front limiting element 6, so that the friction between the front stroke plate 5 and the front positioning block 7 is reduced, and the service life is prolonged.

Preceding compact heap 12 is equipped with the interior protruding piece 121 that imbeds in the spout 11 near the inside of sleeve pipe 1, and preceding housing screw 14 outside-in passes preceding compact heap 121, interior protruding piece 121 and preceding housing block 7 screw-thread fit, through the preceding housing screw 14 of screwing, can compress tightly preceding compact heap 12 on sleeve pipe 1 outer wall, realizes the location to preceding stroke board 5 to realized the location to preceding limiting element 6, location operation is simple and effective.

Referring to fig. 6, the upper portion of the front positioning block 7 is provided with a convex block 71 protruding towards the inner wall of the sleeve 1, the inner wall of the sleeve 1 is provided with a convex block groove 19 in sliding fit with the convex block 71, the convex block groove 19 is arranged along the axial direction of the push rod 4, the convex block 71 is embedded into the convex block groove 19, when the front stroke plate 5 slides, guiding and positioning are provided, the sliding stability of the front stroke plate 7 is maintained, meanwhile, the front stroke plate 7 and the sleeve 1 are conveniently and quickly assembled, the front stroke plate 5 is quickly positioned, the contact area between the front positioning block 7 and the sleeve 1 is increased, when the front positioning screw is locked, the position of the front positioning block 7 is kept stable, deformation of the front positioning block 7 is avoided, and the front stroke plate 5 is effectively fixed.

The electric push rod has adjustable output stroke, controllable installation and simple adjustment operation, obviously improves the use effect of the electric push rod, realizes the control of the output stroke and the installation in a larger range by a universal structure, does not need to design and produce the electric push rods with various specifications, and reduces the production and use cost.

The stroke and installation can be adjusted, when the position of an initial installation distance (the position of the front end of the push rod 1 in an initial state) needs to be adjusted, the front positioning screw 14 on the front pressing block 7 can be correspondingly loosened, the front stroke plate 5 is slid, the front positioning block 7 is driven to move, after the position is in place, the front positioning screw on the front pressing block 7 is locked, and the position of the front limiting element 6 is positioned; when the output stroke of the push rod 1 needs to be adjusted, the rear positioning screw on the rear pressing block 13 can be correspondingly loosened, the rear stroke plate 8 is slid, the position of the rear limiting element 9 is adjusted, after the rear stroke plate is in place, the rear positioning screw on the rear pressing block 13 is locked, the rear limiting element 9 is positioned, the adjustment is convenient, and the universality is high.

Referring to fig. 7, the space in the sleeve 1 is divided into a screw rod cavity 101 for accommodating the screw rod 2 and an adjusting cavity 102 for accommodating the stroke plate and the limiting element, the screw rod 2 is arranged in the screw rod cavity 101, the stroke plate and the limiting element are arranged in the adjusting cavity, the pipe wall of the sleeve 1 is provided with a boss for separating the screw rod cavity 101 from the adjusting cavity 102, the boss comprises an upper boss 103 and a lower boss 104 which are oppositely arranged, the upper boss 103 extends inwards from the upper inner wall of the sleeve 1, the lower boss 104 extends inwards from the lower inner wall of the sleeve 1, the upper boss 103 and the lower boss 104 are not in contact, the adjusting cavity 102 is communicated with the screw rod cavity 101, the switch contact 17 extends from the screw rod cavity 101 to the adjusting cavity 102 to trigger the limiting element, and stroke control is realized, and the inner boss 181 is the inner end of the upper boss 103.

Specifically, referring to fig. 7, an end face of one side of the inner protrusion 181 facing the adjustment cavity 102 contacts an end face of the upper protrusion 173 facing the screw rod cavity 102, a first inner groove 1041 having a U-shaped cross section is disposed on an end face of the lower protrusion 104 facing the adjustment cavity 101, a second inner groove 1042 is disposed on an inner wall of the adjustment cavity 102, the first inner groove 1041, the second inner groove 1042 is oppositely disposed, the openings of the first inner groove 1041 and the second inner groove 1042 are opposite, and the first inner groove 1041 and the second inner groove 1042 are in a unified horizontal plane, the first inner groove 1041 and the second inner groove 1042 are in sliding fit, so that the stroke plate is reliably limited, so that the formed plate can only slide in the adjustment cavity 102 along the axial direction, meanwhile, a protruding reinforcing portion is formed on an inner wall structure of the sleeve 1, so as to reinforce, improve structural strength of the sleeve 1, the sleeve 1 is integrally formed with the sleeve 1, and the structural strength is high, similarly, the adjustment cavity 18 and the inner groove 19 are both corresponding to the sleeve 102, and the sleeve 1 can be manufactured integrally formed into a sleeve structure.

Example 2: the difference between the embodiment and the embodiment 1 is that in the embodiment, the switch contact piece 17 and the nut 3 are of an integrated structure, and the rest of the nut 3 of the switch contact piece 17 is an integrated injection molding structural part, so that the rapid production is facilitated, the structural precision is high, and the limiting precision is improved.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the techniques of the present invention are substantially any simple modification and equivalent changes to the above embodiments, all falling within the protection scope of the present invention.

Claims (10)

1. Stroke, installation adjustable electric putter establish the nut outside the lead screw including motor, worm wheel, lead screw, cover, establish the sleeve pipe outside the nut, and the worm wheel setting is equipped with the box outside lead screw one end and lead screw meshing, the worm wheel, and the motor is fixed on the box, and the motor shaft extends to the box in and the worm wheel meshing, its characterized in that: the nut is sleeved on the lead screw and connected with the push rod, a sliding groove along the axial direction of the push rod is arranged in the sleeve, a stroke plate is arranged in the sliding groove, a limiting element is arranged on the stroke plate, a switch contact part which triggers the limiting element to limit the push rod to continue to move along the current direction is arranged on the nut, a positioning block is further arranged on the stroke plate, a positioning screw which extends out of the sleeve is arranged on the positioning block, a stroke groove hole through which the positioning screw passes is formed in the sleeve, the stroke groove hole is a long-strip-shaped hole along the axial direction of the push rod, a pressing block which is connected with the positioning screw is arranged out of the sleeve, and the pressing block is pressed on the outer wall of the sleeve by the positioning screw to fix the position of the limiting element.

2. The stroke, installation adjustable electric putter of claim 1 wherein: the limiting elements and the positioning blocks are distributed at two ends of the stroke plate.

3. The stroke, installation adjustable power putter of claim 1, wherein: the stroke plate is provided with an embedding groove for installing the limiting element, the end part of the stroke plate is provided with a flange which protrudes upwards and/or downwards, the flange is embedded into the sliding groove and is in sliding fit with the sliding groove, and the inner side of the flange and the groove opening of the sliding groove are not in contact with the positioning block and the limiting element.

4. The stroke, installation adjustable power putter of claim 1, wherein: the switch contact piece comprises a connecting part connected with the nut and a trigger plate extending towards one side close to the limiting element, the connecting part and the trigger plate are of an integrated structure, the top end of the limiting element is provided with a spherical contact, the end faces of two sides of the trigger plate, opposite to the contact, are inclined or slope surfaces, the outer end of the trigger plate, close to the sleeve, is embedded into a guide groove arranged inside the sleeve, and the guide groove is axially arranged along the push rod.

5. The stroke, installation adjustable power putter of claim 4, wherein: the connecting portion are C-shaped and elastic, and the nut is provided with a connecting groove connected with the connecting portion in a clamped mode.

6. The stroke, installation adjustable power putter of claim 4, wherein: the upper end of the trigger plate is provided with an upper bulge, and the upper bulge is attached to an inner bulge arranged inside the sleeve to limit the position of the trigger plate in the sleeve.

7. The stroke, installation adjustable power putter of claim 4, wherein: the connecting part and the trigger plate are of an integrated structure, and the limiting element is a microswitch.

8. The stroke, installation adjustable power putter of claim 1, wherein: the upper part of the positioning block is provided with a convex block protruding towards the inner wall of the sleeve, the inner wall of the sleeve is provided with a convex block groove in sliding fit with the convex block, and the convex block groove is axially arranged along the push rod.

9. The stroke, installation adjustable electric putter of claim 1 wherein: the pressing block is provided with an inner convex block embedded into the sliding groove close to the inner portion of the sleeve, and the positioning screw penetrates through the pressing block and the inner convex block from outside to inside to be in threaded fit with the positioning block.

10. The stroke, installation adjustable power putter of claim 1, wherein: the stroke plate comprises a front stroke plate and a rear stroke plate, the limiting elements comprise a front limiting element and a rear limiting element which are correspondingly fixed on the front stroke plate and the rear stroke plate, the positioning blocks comprise a front positioning block and a rear positioning block which correspond to the front stroke plate and the rear stroke plate, and the pressing blocks comprise a front pressing block and a rear pressing block which correspond to the front stroke plate and the rear stroke plate.

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