CN211778827U

CN211778827U - Linear actuator with stable structure

Info

Publication number: CN211778827U
Application number: CN201922497392.8U
Authority: CN
Inventors: 胡仁昌; 陆小健; 卫寿亮
Original assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Current assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-27
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a stable in structure's linear actuator, including linear telescoping device and decelerator, linear telescoping device includes the outer tube, locate the lead screw in the outer tube, screw-nut and cup joint the spacing bearing on the lead screw, decelerator is including installing the casing on the outer tube, spacing bearing includes bearing inner circle and bearing inner race, the both sides of spacing bearing are equipped with respectively with the locating part that the bearing inner circle offseted and the holding ring that offsets with the bearing inner race, the locating part is fixed on the lead screw, the casing compresses tightly spacing bearing on the locating part through the axial of holding ring along the lead screw. The utility model discloses well casing of fixing on the outer tube passes through location ring to locating part direction extrusion bearing inner race, prevents that spacing bearing from taking place to remove along the axial of lead screw, prevents promptly that spacing bearing from taking place the axial float, prevents that the lead screw from taking place to rock together with install the screw-nut on the lead screw for linear actuator's stable in structure improves and uses experience.

Description

Linear actuator with stable structure

Technical Field

The utility model belongs to the linear actuator field, concretely relates to stable in structure's linear actuator.

Background

At present, linear actuator adopts the jump ring for the hole to carry on spacingly to cup jointing the spacing bearing on the lead screw usually, sets up the draw-in groove promptly on the inner wall of outer tube, then sets up the hole jump ring that the part is located the draw-in groove in the draw-in groove, and two terminal surfaces of spacing bearing offset with the jump ring for the hole respectively for spacing bearing installs on the outer tube, and carries on spacingly to spacing bearing along the axial of outer tube.

However, because the width of the clamping groove for installing the clamping spring is slightly larger than the thickness of the clamping spring for the hole during processing, the clamping springs for the two holes are shaken in the clamping groove, and then the shaking of the limiting bearing between the clamping springs for the two holes is caused, so that the limiting bearing has a larger play gap along the axial direction of the screw rod when the linear actuator works, the screw rod and the screw nut installed on the screw rod can be shaken, the structure of the linear actuator is unstable, and the use experience is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a prevent spacing bearing axial float stable in structure's linear actuator is provided.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a stable in structure's linear actuator, including linear telescoping device and decelerator, linear telescoping device includes the outer tube, locate the lead screw in the outer tube, screw-nut and cup joint the spacing bearing on the lead screw, decelerator is including installing the casing on the outer tube, spacing bearing includes bearing inner race and bearing inner race, the both sides of spacing bearing are equipped with respectively with the locating part that the bearing inner race offseted and the holding ring that offsets with the bearing inner race, the locating part is fixed on the lead screw, the casing compresses tightly spacing bearing on the locating part through the axial of holding ring along the lead screw.

Furthermore, a positioning groove is formed in the shell, and the positioning ring is installed in the positioning groove.

Furthermore, the holding ring is including locating the installation department in the constant head tank and the location portion of protrusion in the constant head tank, and location portion offsets with the terminal surface of bearing inner race.

Further, the lead screw includes the pivot and is located the pivot middle part and protrusion in the screw thread section of pivot, and the locating part is the screw thread section, and spacing bearing cup joints on the pivot and offsets with the tip of screw thread section.

Furthermore, the rotating shafts at two ends of the thread section are respectively arranged on the outer tube and the shell through supporting bearings.

Furthermore, a cushion pad is arranged between the screw rod nut and the limiting bearing.

Furthermore, a supporting gasket is arranged between the cushion pad and the limiting bearing, and the outer diameter of the supporting gasket is smaller than the inner diameter of the bearing outer ring.

Furthermore, the speed reducer also comprises a worm gear which drives the screw rod to rotate, and the worm gear is connected with the screw rod through a positioning pin.

Furthermore, the worm wheel comprises a spoke sleeved on the screw rod and a wheel tooth surrounding the spoke, and the spoke penetrates through the positioning ring to be abutted to the inner ring of the bearing.

Further, the shell and the outer pipe are connected through a locking piece.

Compared with the prior art, the beneficial effects of the utility model are that:

when the linear actuator operates, the driving device drives the screw rod to rotate through the speed reducer, the screw rod rotates together with the inner ring of the bearing, when the screw rod rotates, the screw nut in threaded connection with the screw rod moves along the axial direction of the screw rod, the screw nut drives the push rod to stretch along the axial direction of the outer pipe, so as to push and pull an object, at the moment, the outer pipe, the positioning ring and the outer ring of the bearing do not rotate, the outer ring of the bearing is extruded to the direction of the limiting part through the positioning ring by the shell fixed on the outer pipe, the limiting bearing is prevented from moving along the axial direction of the screw rod, namely, the axial movement of the limiting bearing is prevented, the screw rod is prevented from shaking.

Drawings

The invention will be further described with reference to the accompanying drawings and specific embodiments:

fig. 1 is a perspective view of a structurally stable linear actuator of the present invention;

fig. 2 is a cross-sectional view of a structurally stable linear actuator of the present invention;

FIG. 3 is a schematic view of portion A of FIG. 2;

fig. 4 is an exploded view of a structurally stable linear actuator according to the present invention;

fig. 5 is an assembly view of the inside of the outer tube.

Wherein: 1. an outer tube; 2. a screw rod; 21. a rotating shaft; 22. a threaded segment; 3. a feed screw nut; 4. a limit bearing; 41. a bearing inner race; 42. a bearing outer race; 5. a housing; 51. positioning a groove; 52. a locking member; 6. a positioning ring; 61. an installation part; 62. a positioning part; 7. a support bearing; 8. a cushion pad; 9. a support washer; 10. a worm gear; 101. a spoke; 102. gear teeth; 103. and a positioning pin.

Detailed Description

The utility model provides a stable in structure's linear actuator, including linear telescoping device and decelerator, linear telescoping device includes the outer tube, locate the lead screw in the outer tube, screw-nut and cup joint the spacing bearing on the lead screw, decelerator is including installing the casing on the outer tube, spacing bearing includes bearing inner race and bearing inner race, the both sides of spacing bearing are equipped with respectively with the locating part that the bearing inner race offseted and the holding ring that offsets with the bearing inner race, the locating part is fixed on the lead screw, the casing compresses tightly spacing bearing on the locating part through the axial of holding ring along the lead screw. The utility model discloses well casing of fixing on the outer tube passes through location ring to locating part direction extrusion bearing inner race, prevents that spacing bearing from taking place to remove along the axial of lead screw, prevents promptly that spacing bearing from taking place the axial float, prevents that the lead screw from taking place to rock together with install the screw-nut on the lead screw for linear actuator's stable in structure improves and uses experience.

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present 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 present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The first embodiment is as follows:

a structurally stable linear actuator, as shown in fig. 1 to 5, includes a linear expansion device, a reduction gear, and a driving device for driving the linear expansion device to expand and contract through the reduction gear. The linear telescoping device includes outer tube 1, locate lead screw 2 in the outer tube 1, screw-nut 3 and cup joint the spacing bearing 4 on lead screw 2, decelerator is including installing casing 5 on outer tube 1, spacing bearing 4 includes bearing inner race 41 and bearing inner race 42, spacing bearing 4's both sides are equipped with locating part and holding ring 6 respectively, locating part and holding ring 6 carry on spacingly to the spacing bearing 4 who cup joints on lead screw 2 jointly, prevent that spacing bearing 4 from taking place to remove along the axial of lead screw 2, the locating part is fixed on lead screw 2, install casing 5 on outer tube 1 and compress tightly spacing bearing 4 on the locating part through holding ring 6 along the axial of lead screw 2, make locating part and bearing inner race 41 offset, holding ring 6 offsets with bearing inner race 42. When the linear actuator operates, the driving device drives the screw rod 2 to rotate through the speed reducer, the screw rod 2 rotates together with the bearing inner ring 41, when the screw rod 2 rotates, the screw nut 3 in threaded connection with the screw rod 2 moves along the axial direction of the screw rod 2, the screw nut 3 drives the push rod to stretch along the axial direction of the outer pipe 1, so as to push and pull an object, at the moment, the shell 5 is a shell, the outer pipe 1 is an outer positioning ring 6, the shell 5 fixed on the outer pipe 1 extrudes the bearing outer ring 42 towards the direction of the positioning part through the positioning ring 6, the limiting bearing 4 is prevented from moving along the axial direction of the screw rod 2, namely, the axial movement of the limiting bearing 4 is prevented, the screw rod 2 is prevented from shaking together with the screw nut 3 installed on the screw rod.

Be equipped with constant head tank 51 in casing 5 in this embodiment, holding ring 6 is installed in constant head tank 51, during the installation, install lead screw 2 with spacing bearing 4 and setting element earlier, then aim at holding ring 6 lid with casing 5's constant head tank 51 and close the tip of outer tube 1, holding ring 6 can be injectd casing 5's mounted position, guarantee casing 5 and lead screw 2's concentricity, because lead screw 2's tip supports respectively on outer tube 1's tip and casing 5, so when guaranteeing the installation casing 5 and lead screw 2's concentricity can be convenient for lead screw 2 and casing 5 between the installation, prevent 2 both ends atress inequalities of lead screw, prolong lead screw 2's life. In the embodiment, the shell 5 is not installed and positioned through the outer pipe 1, but the shell 5 is positioned through the positioning ring 6 when the shell 5 is installed, and even if the structure size in the shell 5 is too large, the installation and the positioning of the shell 5 are not affected.

The preferred of this embodiment, holding ring 6 is including locating installation department 61 in constant head tank 51 and the location portion 62 of protrusion in constant head tank 51, location portion 62 offsets with bearing inner race 42's terminal surface, installation department 61 makes holding ring 6 joint and stable cooperation with constant head tank 51 in constant head tank 51, prevents to take place radially upwards to rock between holding ring 6 and the casing 5, location portion 62 offsets with bearing inner race 42's terminal surface, applys the ascending power in the axial to spacing bearing 4, guarantees the stability of spacing bearing 4 installation.

In this embodiment, the lead screw 2 includes pivot 21 and the screw thread section 22 that is located pivot 21 middle part and protrusion in pivot 21, the locating part is screw thread section 22, spacing bearing 4 cup joints on pivot 21 and offsets with the tip of screw thread section 22, because screw thread section 22 protrusion is on pivot 21 surface, so screw thread section 22's tip can be spacing to spacing bearing 4, screw thread section 22 is used for the flexible of push rod, it is spacing also to be used for spacing bearing 4 simultaneously, need not additionally to set up protruding structure as the locating part, be convenient for more production and processing, reduce the production and processing cost.

In order to eliminate abrasion between the rotating shaft 21 and the outer tube 1 or between the rotating shaft 21 and the housing 5 when the screw rod 2 rotates, the outer tube 1 and the housing 5 are both provided with the supporting bearings 7, the outer rings of the supporting bearings 7 are fixed on the outer tube 1 or the housing 5, and the rotating shafts 21 at two ends of the threaded section 22 are arranged on the inner rings of the supporting bearings 7 in a penetrating manner, so that the supporting bearings 7 support two ends of the screw rod 2.

When feed screw nut 3 moved extreme position, carry on spacingly through the striking between with spacing bearing 4, send huge noise for preventing between feed screw nut 3 and the spacing bearing 4 when striking, prevent simultaneously that the striking from damaging feed screw nut 3 and spacing bearing 4, this embodiment has set up blotter 8 between feed screw nut 3 and spacing bearing 4, the preferred adoption rubber material of blotter 8. In order to prevent the screw nut 3 from partially extruding the cushion pad 8 into the space between the bearing inner ring 41 and the bearing outer ring 42 to influence the rotation of the limit bearing 4 when the screw nut strikes the cushion pad 8 for multiple times, a support washer 9 is arranged between the cushion pad 8 and the limit bearing 4, the outer diameter of the support washer 9 is smaller than the inner diameter of the bearing outer ring 42, and the support washer 9 is prevented from contacting the bearing outer ring 42 when rotating along with the bearing inner ring 41.

In this embodiment, decelerator is still including driving 2 pivoted worm wheels 10 of lead screw and the worm with worm wheel 10 meshing, drive arrangement includes the motor, connect through locating pin 103 between the tip of worm wheel 10 and lead screw 2, the worm links to each other with the motor, the output shaft of motor drives the worm and rotates, the worm drives worm wheel 10 and rotates, worm wheel 10 drives lead screw 2 through locating pin 103 and rotates, worm wheel 10 is including cup jointing spoke 101 on lead screw 2 and the teeth of a cogwheel 102 that encircles spoke 101, spoke 101 passes holding ring 6 and bearing inner race 41 and offsets, make limit bearing 4 can fix a position worm wheel 10 to helping locating pin 103, prevent that locating pin 103 from rocking and leading to worm wheel 10 poor with worm drive effect along the axial of lead screw 2.

In order to facilitate installation and disassembly, the shell 5 and the outer tube 1 are connected through a locking piece 52, for example, screws and other structures are preferably adopted, so that the shell 5 and the outer tube 1 do not need to be aligned relative to the installation of the locking piece 52, and the self-tapping screws can be installed only after the shell 5 is installed on the outer tube 1, thereby facilitating installation.

The utility model provides a linear actuator mainly used kitchen lampblack absorber or integrated kitchen.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a stable in structure's linear actuator, includes linear telescoping device and decelerator, linear telescoping device includes the outer tube, locates lead screw, screw-nut in the outer tube and cup joints the spacing bearing on the lead screw, decelerator is including installing the casing on the outer tube, its characterized in that: the limiting bearing comprises a bearing inner ring and a bearing outer ring, a limiting part and a positioning ring are arranged on two sides of the limiting bearing respectively, the limiting part is abutted against the bearing inner ring, the positioning ring is abutted against the bearing outer ring, the limiting part is fixed on the lead screw, and the shell compresses the limiting bearing on the limiting part along the axial direction of the lead screw through the positioning ring.

2. A structurally stable linear actuator as claimed in claim 1, wherein: a positioning groove is formed in the shell, and the positioning ring is installed in the positioning groove.

3. A structurally stable linear actuator as claimed in claim 2, wherein: the holding ring is including locating the installation department in the constant head tank and the location portion of protrusion in the constant head tank, location portion with the terminal surface counterbalance of bearing inner race.

4. A structurally stable linear actuator as claimed in claim 1, wherein: the lead screw includes the pivot and is located the pivot middle part and the screw thread section of protrusion in the pivot, the locating part is the screw thread section, spacing bearing cup joints on the pivot and offsets with the tip of screw thread section.

5. A structurally stable linear actuator as claimed in claim 4, wherein: and rotating shafts at two ends of the threaded section are respectively arranged on the outer pipe and the shell through supporting bearings.

6. A structurally stable linear actuator as claimed in claim 1, 4 or 5, wherein: and a cushion pad is arranged between the screw rod nut and the limiting bearing.

7. A structurally stable linear actuator as claimed in claim 6, wherein: and a supporting gasket is arranged between the buffer pad and the limiting bearing, and the outer diameter of the supporting gasket is smaller than the inner diameter of the bearing outer ring.

8. A structurally stable linear actuator as claimed in claim 1, wherein: the speed reducer further comprises a worm gear driving the screw rod to rotate, and the worm gear is connected with the screw rod through a positioning pin.

9. A structurally stable linear actuator as claimed in claim 8, wherein: the worm wheel comprises a spoke sleeved on the screw rod and a gear tooth surrounding the spoke, and the spoke penetrates through the positioning ring to abut against the inner ring of the bearing.

10. A structurally stable linear actuator as claimed in claim 1, wherein: the shell is connected with the outer pipe through a locking piece.