CN218377563U - Light transmission device - Google Patents

Abstract

A lightweight transmission device comprises a first motion unit, a second motion unit and a rolling unit. The first motion unit has a first rolling groove extending along a motion path. The second moving unit is provided with a second moving part movably arranged on the first moving unit and track pieces, the number of the second moving parts corresponds to that of the first rolling grooves and the track pieces are embedded in the second moving part, the track pieces are provided with second rolling grooves extending along the moving path, the second moving part is made of a first material, the track pieces are made of a second material, and the specific gravity of the first material is smaller than that of the second material. The rolling unit includes a plurality of rolling members. The effect of reducing weight is achieved on the premise of maintaining rigidity by using firmer and durable materials at the parts which need to be stressed frequently and stress concentration.

Description

Light transmission device

Technical Field

The utility model relates to a transmission especially relates to a lightweight transmission.

Background

Generally, a conventional transmission device, such as a spline or a ball screw, is made of metal for the most part, and is manufactured by casting, forging, cutting, and surface hardening.

However, although the metal material has the characteristics of being sturdy and durable, the weight of the metal material is relatively high, the weight is high in the transmission process, namely, the driving process needs to consume larger force, in addition, the inertia is large due to the high weight, the speed and the movement direction are difficult to change, and therefore the metal material has the rigidity and reduces the weight, and the problem to be solved is solved.

Disclosure of Invention

An object of the utility model is to provide a lightweight transmission that can lighten weight.

The utility model discloses a lightweight transmission contains first motion unit, second motion unit, and rolls the unit.

The first motion unit has at least one first rolling groove extending along a motion path.

The second motion unit is arranged on the first motion unit, can move relative to the first motion unit, and comprises a second moving part movably arranged on the first motion unit and a track piece, the number of the second moving part corresponds to that of the first rolling groove, the track piece is embedded in the second moving part, the track piece is provided with at least one second rolling groove extending along the motion path, the second moving part is made of a first material, the track piece is made of a second material, and the specific gravity of the first material is smaller than that of the second material.

The rolling unit comprises a plurality of rolling parts, and each rolling part is a sphere and can be arranged between the at least one first rolling groove and the at least one second rolling groove in a rolling manner.

The utility model discloses a lightweight transmission, first motion unit includes and extends and supply along an axis the first moving part that the second moving part cover was established, first moving part has at least a pair of angulation and defines out for the plane the first groove inner face in first roll groove.

The utility model discloses a lightweight transmission, the second motion unit still includes two edges the axis set up in the backward flow lid at the opposite both ends of second moving part, the second moving part has quantity and corresponds to open and can the holding in first roll groove and both ends the holding hole of rolling member, the track spare has two angulations and defines out for the plane the second inslot face in second roll groove, each backward flow lid have the quantity correspond to first roll groove and intercommunication first roll groove reaches the guide part in holding hole, the rolling member is in the guide part the holding hole reaches the circulation rolls between first roll groove.

The utility model discloses a lightweight transmission, the second motion unit is still located including the cover the outer sleeve of second moving part, the outer sleeve has the edge the axis extends and the cover is located the sleeve portion of second moving part, and by the one end of sleeve portion is followed the radial flange portion that outwards extends of sleeve portion.

The utility model discloses a lightweight transmission, flange portion has two edges the lock solid face that the extending direction of axis set up in opposite, and a plurality of cave in lock solid face one of them subtracts the weight of groove, subtract the weight of groove and wind axis angle interval sets up.

The utility model discloses a lightweight transmission, at least one second roll groove perpendicular to the cross-section in motion route is the V style of calligraphy respectively.

The utility model discloses a lightweight transmission, each rolling member have two butt in the first butt portion of first inslot face, and two be opposite to first butt portion and butt in the second butt portion of second inslot face, each second inslot face form the indenture, the shape fit of indenture the second butt portion, the second moving part is made for plastics injection moulding, the track spare is made for metal processing.

The utility model discloses a lightweight transmission, first motion unit is the integral key shaft, the second motion unit is the spline urceolus.

The utility model discloses a lightweight transmission, first motion unit is the screw rod, the second motion unit is the nut.

The utility model discloses a lightweight transmission, the rolling member is the steel ball.

The beneficial effects of the utility model reside in that: the utility model discloses a position that needs frequent atress and stress concentration uses comparatively sturdy and durable material, uses and has firm and lightweight material simultaneously in the part that does not receive the force relatively, under the prerequisite of maintaining the rigidity, reaches the efficiency of weight reduction.

Drawings

Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings, in which:

fig. 1 is a perspective view illustrating a first embodiment of the lightweight transmission of the present invention;

FIG. 2 is an exploded view of the first embodiment;

FIG. 3 is a top view of the first embodiment;

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a cross-sectional view taken along line V-V in FIG. 3;

FIG. 6 is an enlarged partial cross-sectional view of the first embodiment; and

fig. 7 is a cross-sectional view illustrating a second embodiment of the lightweight transmission of the present invention.

Detailed Description

Referring to fig. 1, 2 and 3, a first embodiment of the lightweight transmission device of the present invention includes a first motion unit 2, a second motion unit 3, and a rolling unit 4.

Referring to fig. 2, 4 and 5, the first moving unit 2 includes a first movable member 21 extending along an axis L1. The first movable member 21 has two pairs of first angled and planar inner slot surfaces 211 (see fig. 6), each pair of first inner slot surfaces 211 defining a first rolling slot 212 extending along a movement path L2, i.e., the number of the first rolling slots 212 is two, the first rolling slots 212 being angularly spaced about the axis L1.

The second moving unit 3 is disposed on the first moving unit 2 and can move relative to the first moving unit 2, and has a second moving member 31 movably sleeved on the first moving unit 2, two rail members 32 respectively corresponding to the first rolling grooves 212 and embedded on the second moving member 31, two backflow covers 33 disposed on two opposite ends of the second moving member 31 along the axis L1, and an outer sleeve 34 sleeved on the second moving member 31.

More specifically, the second movable member 31 has two accommodating holes 311 corresponding to the first rolling grooves 212 respectively, and two ends of each accommodating hole are open and can accommodate the rolling member 41, that is, the number of the accommodating holes 311 corresponds to the number of the first rolling grooves 212. Each rail member 32 has two angled and planar second grooved inner faces 321, and a second rolling groove 322 defined by the second grooved inner faces 321 and extending along the movement path L2. Each second groove inner face 321 forms an indentation 323 (see fig. 6) extending along the movement path L2. Each of the reflow covers 33 has a number of guides 331 (two in this embodiment) corresponding to the first rolling grooves 212 and communicating the first rolling grooves 212 and the receiving holes 311. The outer sleeve 34 has a sleeve portion 341 extending along the axis L1 and sleeved on the second movable member 31, and a flange portion 342 extending from one end of the sleeve portion 341 outward in a radial direction of the sleeve portion 341. The flange portion 342 has two locking surfaces 343 disposed opposite to each other in the extending direction of the axis L1, and a plurality of weight-reducing grooves 344 recessed in one of the locking surfaces 343, the weight-reducing grooves 344 being angularly spaced around the axis L1.

It should be noted that, in the present embodiment, the number of the first rolling grooves 212 and the second rolling grooves 322 is two, and in other implementation aspects, the number may be adjusted to be one, three, or more than four according to the requirement, which is not limited to this.

Referring to fig. 4, 5 and 6, the rolling unit 4 includes a plurality of rolling elements 41, each rolling element 41 is a ball and is rollably disposed between the first rolling groove 212 and the second rolling groove 322, and includes two first abutting portions 411 abutting against the first groove inner surface 211, and two second abutting portions 412 opposing to the first abutting portions 411 and abutting against the second groove inner surface 321. The shape of the indentation 323 of the second groove inner surface 321 fits the second contact portion 412, and the rolling member 41 rolls cyclically between the guide portion 331, the accommodating hole 311, and the first rolling groove 212 and the second rolling groove 322.

In more detail, in this embodiment, the movement path L2 is a straight line, the first movement unit 2 is a spline shaft, the second movement unit 3 is a spline outer cylinder, and the rolling member 41 is a steel ball, which may be other equivalent elements in other implementation modes, but is not limited thereto; each of the second rolling grooves 322 has a V-shaped cross section perpendicular to the moving path L2, and in other embodiments, the cross section of the second rolling groove 322 perpendicular to the moving path L2 may have another shape that is in point contact with the rolling member 41, such as a U-shape, but not limited thereto.

It is worth mentioning that the second movable member 31 is made of a first material and the rail member 32 is made of a second material, the specific gravity of the first material being lower than that of the second material. In the present embodiment, the second movable member 31 is made of engineering plastic by injection molding, and the rail member 32 is made of steel by metal processing, but in other embodiments, different materials may be selected according to requirements, and the invention is not limited thereto.

In operation, the guiding portion 331, the accommodating hole 311, the first rolling groove 212 and the second rolling groove 322 constrain the rolling element 41 to roll circularly therebetween, so as to reduce the friction force between the first motion unit 2 and the second motion unit 3, so that the second motion unit 3 can smoothly move relative to the first motion unit 2, and can be connected with other components through the outer sleeve 34, so as to transmit power in a manner of reducing loss.

Compare transmission among the prior art, the utility model discloses a position that needs often atress and stress concentration uses comparatively sturdy and durable material, uses and has firm and lightweight material simultaneously in the part that does not atress relatively, under the prerequisite of maintaining the rigidity, reaches the efficiency of weight reduction. In addition, since the indentation 323 and the rolling member 41 can be precisely matched with each other, the effect of improving the precision of the product can be further achieved.

Referring to fig. 7, a second embodiment of the lightweight transmission device of the present invention, which is the same as the first embodiment, also includes the first moving unit 2, the second moving unit 3, and the rolling unit 4, and the difference is: in this embodiment, the first moving unit 2 is a screw, the second moving unit 3 is a nut, and the moving path L2 is a spiral line.

Thus, the second embodiment can achieve the same effects as the first embodiment.

To sum up, the utility model discloses lightweight transmission can reach the purpose of the utility model with low costs really.

Claims (10)

1. The utility model provides a lightweight transmission, contains first motion unit, second motion unit, and rolls the unit, first motion unit has at least one first roll groove that extends along the motion path, the second motion unit set up in first motion unit and can with first motion unit relative motion to including movably set up in first motion unit's second moving part, roll the unit and include a plurality of rolling members, each rolling member is the spheroid, its characterized in that: the second moving unit further comprises rail pieces which correspond to the first rolling grooves in quantity and are embedded in the second moving piece, the rail pieces are provided with at least one second rolling groove extending along the moving path, each rolling piece can be arranged between the at least one first rolling groove and the at least one second rolling groove in a rolling mode, the second moving piece is made of a first material, the rail pieces are made of a second material, and the specific gravity of the first material is smaller than that of the second material.

2. The lightweight transmission of claim 1, wherein: the first moving unit comprises a first moving member which extends along an axis and is provided for the second moving member to be sleeved, and the first moving member is provided with at least one pair of first groove inner surfaces which form an angle and are planes and define the first rolling groove.

3. The lightweight transmission of claim 2, wherein: the second motion unit further comprises two backflow covers arranged at two opposite ends of the second motion unit along the axis, the second motion unit is provided with a plurality of accommodating holes corresponding to the first rolling grooves, two ends of the accommodating holes are open and can accommodate the rolling pieces, the rail piece is provided with two second groove inner faces which form an angle and are planes and define the second rolling grooves, each backflow cover is provided with a plurality of guiding portions corresponding to the first rolling grooves and communicated with the first rolling grooves and the accommodating holes, and the rolling pieces are circularly rolled among the guiding portions, the accommodating holes and the first rolling grooves.

4. The lightweight transmission of claim 2, wherein: the second moving unit further comprises an outer sleeve sleeved on the second moving member, and the outer sleeve is provided with a sleeve portion extending along the axis and sleeved on the second moving member, and a flange portion extending outwards from one end of the sleeve portion along the radial direction of the sleeve portion.

5. The lightweight transmission of claim 4, wherein: the flange portion has two locking surfaces disposed in opposite directions along the axis, and a plurality of weight-reducing grooves recessed in one of the locking surfaces, the weight-reducing grooves being angularly spaced around the axis.

6. The lightweight transmission of claim 1, wherein: the sections of the at least one second rolling groove, which are perpendicular to the motion path, are respectively in a V shape.

7. A lightweight drive according to claim 3, wherein: each rolling piece is provided with two first abutting parts abutting against the inner surfaces of the first grooves and two second abutting parts which are opposite to the first abutting parts and abut against the inner surfaces of the second grooves, each inner surface of the second groove is provided with an indent, the shape of the indent is matched with that of the second abutting parts, the second moving piece is made by plastic injection molding, and the rail piece is made by metal processing.

8. The lightweight transmission of claim 1, wherein: the first moving unit is a spline shaft, and the second moving unit is a spline outer cylinder.

9. The lightweight transmission of claim 1, wherein: the first moving unit is a screw rod, and the second moving unit is a screw cap.

10. The lightweight transmission of claim 8 or 9, wherein: the rolling parts are steel balls.

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