CN217216172U - High-thrust lifting actuator - Google Patents

Abstract

The utility model discloses a high-thrust lifting actuator, which comprises a shell, a shell cover, a motor, a transmission assembly, an outer tube and a screw rod, wherein the shell and the shell cover are matched to form a containing cavity; the outer pipe sleeve is arranged at one end of the screw rod, a plurality of mounting holes are correspondingly formed in the outer pipe, the shell and the shell cover, and the bolt assembly sequentially penetrates through the mounting holes in the shell cover, the shell and the outer pipe to be fixedly connected with the shell cover, the shell and the outer pipe. Big thrust lift executor, outer tube, casing and cap three set up the mounting hole that corresponds, can connect outer tube, casing and cap simultaneously through same longer bolt, adopt nut locking again to avoid bolt assembly to loosen, improve the anti ability of falling of outer tube by a wide margin, can be used for big thrust lift executor, reduced screw quantity simultaneously, improve production efficiency, reduce cost.

Description

High-thrust lifting actuator

Technical Field

The utility model relates to a lift executor technical field especially relates to a high thrust lift executor, mainly is applied to body-building apparatus that needs the adjustment slope such as treadmill, spinning.

Background

The lifting actuator applied to fitness equipment needing gradient adjustment, such as a treadmill, a spinning bike and the like, generally comprises a motor assembly, an outer pipe assembly and a reduction gear box; outer pipe subassembly direct fixed mounting refers to the patent that publication number is CN210839144U on the board of equipment such as treadmill, spinning, and the base of outer pipe subassembly is connected on reduction gear's casing with self-tapping screw fastening, and because reduction gear inner space is limited, self-tapping screw's length is very short, and fastening strength is not high, and long-time push-and-pull operation can lead to self-tapping screw to loosen, and the outer tube drops to lead to the unable normal operating of lift executor.

SUMMERY OF THE UTILITY MODEL

In order to solve the self-tapping screw length that is used for fixed outer tube subassembly among the lift executor of prior art shorter, fastening strength is not high, and long-time push-and-pull operation can lead to self-tapping screw to loosen, and the outer tube drops to lead to the technical problem of the unable normal operating of lift executor, the utility model provides a big thrust lift executor solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a high-thrust lifting actuator comprises a shell, a shell cover, a motor, a transmission assembly, an outer tube and a screw rod, wherein the shell and the shell cover are matched to form an accommodating cavity, the transmission assembly is located in the accommodating cavity, and the transmission assembly is suitable for transmitting the torque of the motor to the screw rod so as to enable the screw rod to do reciprocating linear motion; the outer pipe sleeve is arranged at one end of the screw rod, a plurality of mounting holes are correspondingly formed in the outer pipe, the shell and the shell cover, and the bolt assembly sequentially penetrates through the mounting holes in the shell cover, the shell and the outer pipe to be fixedly connected with the shell cover, the shell and the outer pipe.

The axial outer end face of the shell cover is also provided with a reinforcing cover suitable for surrounding the convex part.

Furthermore, the axial outer end face of the convex part is provided with at least two positioning convex points, and the reinforcing cover is provided with positioning grooves correspondingly matched with the positioning convex points.

Furthermore, the reinforcing cover is also provided with mounting holes corresponding to the outer pipe, the shell and the shell cover, and the reinforcing cover, the outer pipe, the shell and the shell cover are fixedly connected by the same bolt assembly.

Furthermore, a bottom plate is arranged at one axial end of the outer tube, the mounting hole of the outer tube is located on the bottom plate, at least two positioning bosses protruding towards the direction of the bottom plate are arranged on the axial end face of the shell, and positioning holes matched with the positioning bosses are formed in the bottom plate.

The Hall sensor further comprises a Hall assembly and a Hall pressing plate suitable for pressing the Hall assembly, wherein the Hall assembly comprises a Hall element and a lead wire connected with the Hall sensor; the screw rod is in threaded connection with a final-stage gear of the transmission assembly, and a magnetic ring which is opposite to the Hall sensor is arranged on the final-stage gear of the transmission assembly; the circumference outer fringe of casing has the hall installing port that is suitable for hall element to pass, and the casing surface that is located hall installing port both sides is equipped with the draw-in groove, the hall clamp plate is located hall installing port department, and has the jack catch with the draw-in groove joint on the hall clamp plate.

Furthermore, a Hall positioning sleeve suitable for positioning the Hall element is further arranged in the shell, and a first ribbed plate abutted against the Hall element and a second ribbed plate abutted against the Hall positioning sleeve are further arranged at one end, facing the Hall mounting opening, of the Hall pressure plate.

Furthermore, the number of the clamping jaws is two, and the first rib plate and the second rib plate are located between the two clamping jaws.

Further, the bottom plate is profiled with the shell.

Furthermore, the peripheral outer edge of the shell cover is provided with a protruding part, and the end face, perpendicular to the central shaft of the screw rod, of the protruding part is attached to the surface of the Hall pressure plate.

The utility model has the advantages that:

(1) big thrust lift executor, outer tube, casing and cap three set up the mounting hole that corresponds, can connect outer tube, casing and cap simultaneously through same longer bolt, adopt nut locking again to avoid bolt assembly to loosen, improve the anti ability of falling of outer tube by a wide margin, can be used for big thrust lift executor, reduced screw quantity simultaneously, improve production efficiency, reduce cost.

(2) High thrust lift executor, set up corresponding constant head tank and location bump on strengthening cover and convex part, guarantee that the assembling process strengthens cover and cap and can not produce the position in week and remove.

(3) High thrust lift executor, press hall element in the casing through hall clamp plate to hall clamp plate and the mutual joint of casing do not need the screw connection during the assembly, reduce the screw and use, improve production efficiency, reduction in production cost.

Drawings

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

Fig. 1 is a perspective view (as viewed from the end of the housing cover) of an embodiment of a high thrust lift actuator according to the present invention;

fig. 2 is a perspective view (viewed from one end of the housing) of a specific embodiment of a high thrust lift actuator of the present invention;

FIG. 3 is a cross-sectional view of an embodiment of the high thrust lift actuator of the present invention;

fig. 4 is an exploded view of the high thrust lift actuator of the present invention;

FIG. 5 is a schematic view of the assembly of the housing cover and the reinforcing cage according to the present invention;

FIG. 6 is a schematic view of the assembly of the housing and the outer tube according to the present invention;

fig. 7 is a schematic structural view of the high-thrust lift actuator according to the present invention;

FIG. 8 is an enlarged view taken at a in FIG. 7;

fig. 9 is an assembly schematic diagram of the hall assembly of the present invention;

fig. 10 is an enlarged view of fig. 9 at b.

In the figure, 1, a housing, 101, a positioning boss, 102, a hall mounting port, 103, a clamping groove, 2, a housing cover, 201, a convex part, 202, a positioning salient point, 203, a reinforcing rib, 204, an extension part, 3, a motor, 4, a transmission assembly, 401, a wheel, 402, a wheel, 403, a wheel, 404, a four wheel, 5, an outer tube, 501, a bottom plate, 502, a positioning hole, 6, a screw rod, 7, an accommodating cavity, 8, an assembling hole, 9, a first screw, 10, a second screw, 11, a bolt, 12, a nut, 13, a thrust bearing, 14, a reinforcing cover, 1401, a bowl-shaped structure, 1402, a mounting plate, 1403, a positioning groove, 15, a hall assembly, 1501, a hall element, 1502, a lead wire, 16, a hall pressing plate, 1601, a claw, 1602, a first rib plate, 1603, a second rib plate, 17, a magnetic ring, 18, and a hall positioning sleeve.

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 with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-10, a high thrust lifting actuator comprises a housing 1, a housing cover 2, a motor 3, a transmission assembly 4, an outer tube 5 and a screw rod 6, wherein the housing 1 and the housing cover 2 cooperate to form an accommodating cavity 7, the transmission assembly 4 is located in the accommodating cavity 7, and the transmission assembly 4 is adapted to transmit torque of the motor 3 to the screw rod 6 so as to enable the screw rod 6 to make reciprocating linear motion; the one end of lead screw 6 is located to the outer tube 5 cover, and all correspond on outer tube 5, casing 1 and the cap 2 and be provided with a plurality of mounting holes, and bolt assembly passes the mounting hole of cap 2, casing 1 and outer tube 5 in proper order so that three fixed connection. The bolt assembly generally comprises a bolt 11 and a nut 12, i.e. the bolt 11 passes through the mounting holes of the housing cover 2, the housing 1 and the outer tube 5 in sequence and is locked by the nut 12.

Example one

The overall structure of the lifting actuator is shown in fig. 1-4, and comprises a housing 1, a housing cover 2, a motor 3, a transmission assembly 4, an outer tube 5 and a screw rod 6, wherein the transmission assembly 4 comprises a first wheel 401, a second wheel 402, a third wheel 403 and a fourth wheel 404. The first wheel 401 is coaxially arranged with the output shaft of the motor 3 and synchronously rotates with the output shaft of the motor 3, the second wheel 402 is externally meshed with the first wheel 401, the third wheel 403 is externally meshed with the second wheel 402, the fourth wheel 404 is externally meshed with the third wheel 403, both the second wheel 402 and the third wheel 403 are two-stage coaxial gears, the first-stage gear of the second wheel 402 is externally meshed with the first wheel 401, the first-stage gear of the third wheel 403 is externally meshed with the second-stage gear of the second wheel 402, and the fourth wheel 404 is externally meshed with the second-stage gear of the third wheel 403. The shell 1 and the shell cover 2 are provided with shaft holes suitable for the screw rod 6 to pass through, the inner peripheries of the four wheels 404 are provided with internal threads in threaded connection with the screw rod 6, and when an output shaft of the motor 3 rotates, the four wheels 404 are driven to rotate, so that the coaxially arranged screw rod 6 is pushed or pulled.

On can installing the board of equipment such as treadmill, spinning when lift executor uses, pilot hole 8 on the lead screw 6 and the pilot hole 8 on the outer tube 5 pass through pin joint with the board, because lead screw 6 and outer tube 5 are fixed at the board, the motor 3 drives the gear rotation after the circular telegram, and four-wheel 404 can produce relative rectilinear movement with lead screw 6, and the board can follow the motion of lead screw 6 and rise the decline.

Wherein the motor 3 is fixedly connected on the shell 1 through a first screw 9; the four wheels 404 are in trapezoidal thread connection with the screw rod 6; the anti-collision gasket is fixed at the end of the screw rod 6 through a second screw 10; the shell 1, the shell cover 2 and the outer tube 5 are fastened and connected together through a bolt 11 and a nut 12, and the outer tube 5 is prevented from falling off.

Example two

On the basis of the first embodiment, the accommodating cavity 7 usually further has a thrust bearing 13 sleeved on the lead screw 6 and pressed against an inner end surface of the housing cover 2, where the thrust bearing 13 is used for realizing the rotational connection between the lead screw 6 and the housing cover 2, and the inner end surface of the housing cover 2 refers to an end surface of the housing cover 2 facing the accommodating cavity 7. The screw 6 exerts a force on the thrust bearing 13 towards the housing cover 2 during the pushing and pulling process, and when this force is too large, the thrust bearing 13 will push the housing cover 2 to be broken, for this reason, in this embodiment, the end face of the housing cover 2 has a convex portion 201 protruding away from the housing 1 and adapted to receive the thrust bearing 13, and the axially outer end face of the housing cover 2 is further provided with a reinforcing cage 14 adapted to surround the convex portion 201. The reinforcing cap 14 is preferably made of metal, and the housing 1 and the housing cover 2 are made of plastic.

During the load rise, the thrust bearing 13 will exert a force on the plastic housing cover 2, and if the metal reinforcing cover 14 is protected, the phenomenon that the housing cover 2 is cracked can be avoided. As shown in fig. 5, the reinforcing cover 14 is composed of a bowl-shaped structure 1401 for accommodating the protrusion 201 and a mounting plate 1402 located at the outer edge of the bowl-shaped structure 1401, the mounting plate 1402 is detachably fixed to the housing cover 2, a plurality of reinforcing ribs 203 are arrayed on the circumference of the outer side in the circumferential direction of the protrusion 201, the reinforcing ribs 203 are used for reinforcing the wall strength of the protrusion 201, the inner diameter of the bowl-shaped structure 1401 on the reinforcing cover 14 is larger than the outer diameter with the reinforcing ribs 203, and the upper inner wall of the reinforcing cover 14 is attached to the upper outer wall of the protrusion 201.

In a further design, at least two positioning protrusions 202 are disposed on the axial outer end surface of the protrusion 201, and the reinforcing cover 14 has positioning grooves 1403 correspondingly matched with the positioning protrusions 202, so as to ensure that the reinforcing cover 14 and the housing cover 2 do not rotate circumferentially during the assembling process. In this embodiment, the upper end of the boss is symmetrically provided with two positioning protruding points 202, the reinforcing cover 14 is correspondingly provided with two positioning grooves 1403, and the two positioning grooves 1403 are located at the edge of the shaft hole of the reinforcing cover 14.

Preferably, the mounting holes on the mounting plate 1402 of the reinforcing cover 14 also correspond to the mounting holes of the outer tube 5, the housing 1, and the housing cover 2, and the bolt assembly fixes the four components at the same time.

EXAMPLE III

On the basis of the first embodiment or the second embodiment, a bottom plate 501 is arranged at one axial end of the outer tube 5, the mounting hole of the outer tube 5 is located on the bottom plate 501, at least two positioning bosses 101 protruding towards the bottom plate 501 are arranged on the axial end surface of the housing 1, and the bottom plate 501 is provided with positioning holes 502 matched with the positioning bosses 101. As shown in fig. 6, the bottom plate 501 and the housing 1 have similar shapes, that is, the outer edge of the bottom plate 501 has the same shape as the outer edge of the housing 1, the upper end of the housing 1 (i.e., the end surface connected to the outer tube 5) is provided with two positioning bosses 101, and the bottom plate 501 is provided with two positioning holes 502, so as to ensure that the outer tube 5 and the housing 1 do not rotate circumferentially during the assembly process.

Since the outer tube 5 and the motor 3 are fixed on the same end surface of the housing 1, in order to avoid interference between the bottom plate 501 and the motor 3, it is preferable that the side of the bottom plate 501 close to the motor 3 is arc-shaped.

Example four

On the basis of the above embodiment, the high-thrust lifting actuator further comprises a hall assembly 15 and a hall pressing plate 16 adapted to press the hall assembly 15, wherein the hall assembly 15 comprises a hall element 1501 and a lead 1502 connected with a hall sensor; the screw rod 6 is in threaded connection with a final gear of the transmission assembly 4, and a magnetic ring 17 which is opposite to the Hall sensor is arranged on the final gear of the transmission assembly 4.

The magnetic ring 17 is fixed in a groove of the four wheels 404 through a buckle, the hall element 15 is assembled with the housing 1, the hall element 15 is pressed by the matching surface of the housing cover 2 and the housing 1, the hall element 15 is prevented from moving axially, and the hall pressing plate 16 can prevent the hall element 15 from moving along the direction of the lead 1502.

The controller supplies power to the hall assembly 15, the magnetic ring 17 rotates along with the four wheels 404 when the four wheels 404 rotate, the hall element 1501 can sense the magnetic pole change of the magnetic ring 17, the hall element 1501 can generate high and low electric frequency signals, and the controller can calculate the extension or retraction length of the screw rod 6 after receiving the change times of the high and low electric frequency signals, so that the gradient adjustment of the machine table is realized.

In this embodiment, the hall assembly 15 is fixed in position by clamping the hall pressing plate 16 with the housing 1, and the specific mounting structure is as follows: as shown in fig. 7-10, a hall mounting port 102 suitable for passing through the hall element 1501 is formed in the circumferential outer edge of the housing 1, card slots 103 are formed in the surface of the housing 1 on two sides of the hall mounting port 102, a hall pressing plate 16 is located at the hall mounting port 102, and a claw 1601 clamped with the card slot 103 is formed on the hall pressing plate 16. The peripheral outer edge of the cover 2 is provided with an extension part 204, and the end surface of the extension part 204 vertical to the central shaft of the screw rod 6 is jointed with the surface of the Hall pressure plate 16. As shown in fig. 10, during assembly, the claws 1601 are aligned with the slots 103, the upper surface of the hall pressing plate 16 is tightly attached to the lower surface of the protruding portion 204, the claws 1601 are plastically deformed during pressing-in, and then the claws 1601 return to the slots 103, and the slots 103 lock the claws 1601.

The Hall assembly 15 does not need to be connected by screws during assembly, so that the number of the screws is reduced, the production efficiency is improved, and the production cost is reduced.

In a further design, a hall locating sleeve 18 suitable for locating the hall element 1501 is further arranged inside the housing 1, and a first rib 1602 abutting against the hall element 1501 and a second rib 1603 abutting against the hall locating sleeve 18 are further arranged at one end of the hall pressure plate 16 facing the hall mounting port 102.

As shown in fig. 10, the hall locating sleeve 18 limits two sides of the hall element 1501, the first rib 1602 limits the hall element 1501 to move towards the lead 1502, so that the hall assembly 15 is fixed, and the second rib 1603 prevents the hall locating sleeve 18 from falling out of the hall mounting port 102.

The claws 1601 are preferably symmetrically arranged in two, and the first rib 1602 and the second rib 1603 are located between the two claws 1601.

In the description of the present invention, it is to be understood that the terms "central," "upper," "lower," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. A high thrust lift executor which characterized in that: the motor-driven screw driver comprises a shell (1), a shell cover (2), a motor (3), a transmission assembly (4), an outer tube (5) and a screw rod (6), wherein the shell (1) is matched with the shell cover (2) to form an accommodating cavity (7), the transmission assembly (4) is positioned in the accommodating cavity (7), and the transmission assembly (4) is suitable for transmitting the torque of the motor (3) to the screw rod (6) so as to enable the screw rod (6) to do reciprocating linear motion;

the outer tube (5) is sleeved at one end of the screw rod (6), a plurality of mounting holes are correspondingly formed in the outer tube (5), the shell (1) and the shell cover (2), and the bolt assembly sequentially penetrates through the mounting holes in the shell cover (2), the shell (1) and the outer tube (5) to be fixedly connected with the shell cover, the shell and the shell cover.

2. The high thrust lift actuator of claim 1, wherein: the screw rod structure is characterized by further comprising a thrust bearing (13) sleeved on the screw rod (6) and pressed against the inner end face of the shell cover (2), the end face of the shell cover (2) is provided with a convex portion (201) protruding towards the direction far away from the shell body (1) and suitable for containing the thrust bearing (13), and the axial outer end face of the shell cover (2) is further provided with a reinforcing cover (14) suitable for surrounding the convex portion (201).

3. The high thrust lift actuator of claim 2, wherein: the axial outer end face of the convex portion (201) is provided with at least two positioning salient points (202), and the reinforcing cover (14) is provided with positioning grooves (1403) correspondingly matched with the positioning salient points (202).

4. The high thrust lift actuator of claim 2, wherein: strengthen cover (14) and also be equipped with the mounting hole that corresponds with outer tube (5), casing (1) and cap (2), strengthen cover (14), outer tube (5), casing (1) and cap (2) and adopt same bolt assembly fixed connection.

5. The high thrust lift actuator of claim 1, wherein: the axial one end of outer tube (5) is equipped with bottom plate (501), the mounting hole of outer tube (5) is located bottom plate (501), the axial terminal surface of casing (1) is equipped with to protruding two at least location bosss (101) of bottom plate (501) direction, have on bottom plate (501) with location boss (101) complex locating hole (502).

6. The high thrust lift actuator of claim 1, wherein: the Hall assembly (15) and a Hall pressure plate (16) suitable for pressing the Hall assembly (15) are further included, and the Hall assembly (15) comprises a Hall element (1501) and a lead (1502) connected with the Hall sensor;

the screw rod (6) is in threaded connection with a final-stage gear of the transmission assembly (4), and a magnetic ring (17) which is opposite to the Hall sensor is arranged on the final-stage gear of the transmission assembly (4);

the Hall installation port (102) suitable for the Hall element (1501) to pass is arranged on the circumferential outer edge of the shell (1), a clamping groove (103) is formed in the surface of the shell (1) located on two sides of the Hall installation port (102), the Hall pressing plate (16) is located at the Hall installation port (102), and a clamping claw (1601) clamped with the clamping groove (103) is arranged on the Hall pressing plate (16).

7. The high thrust lift actuator of claim 6, wherein: the Hall pressure plate (16) is characterized in that a Hall positioning sleeve (18) suitable for positioning a Hall element (1501) is further arranged inside the shell (1), and a first rib plate (1602) abutted against the Hall element (1501) and a second rib plate (1603) abutted against the Hall positioning sleeve (18) are further arranged at one end, facing the Hall mounting port (102), of the Hall pressure plate (16).

8. The high thrust lift actuator of claim 7, wherein: the clamping jaws (1601) are symmetrically arranged in two, and the first rib plate (1602) and the second rib plate (1603) are located between the two clamping jaws (1601).

9. The high thrust lift actuator of claim 5, wherein: the bottom plate (501) is profiled with the shell (1).

10. The high thrust lift actuator of claim 6, wherein: the peripheral outer edge of the shell cover (2) is provided with a protruding part (204), and the end face, perpendicular to the central shaft of the screw rod (6), of the protruding part (204) is attached to the surface of the Hall pressure plate (16).

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