JP3212649U - Linear motion module - Google Patents

Abstract

A linear motion module is provided that is less likely to be distorted during assembly and that can ensure stability and smoothness when a slide block is reciprocating. A linear rail portion having a rail groove, a screw shaft disposed in parallel to the linear rail portion, a slide block that is slidably installed on the linear rail portion and is provided through the screw shaft. , Two receiving bases 4 respectively installed at both ends of the linear rail part 1, the receiving base 4 has positioning columns 41, the positioning columns 41 are installed corresponding to the rail grooves 11, and slide The block is installed on both sides of the slide block main body, the two end caps installed at both ends of the slide block main body, and the slide block main body and the two end caps. Two dustproof assemblies. [Selection] Figure 3A

Description

  The present invention relates to a linear motion module, and more particularly to a linear motion module in which a positioning column is disposed on a receiving base.

  The linear motion module includes a linear rail portion, a slide block, and a plurality of balls. The straight rail portion has at least two rail grooves, and the screw shafts are disposed in parallel with the straight rail portion at the same time as being installed on the two receiving bases. By combining the linear rail part and the screw shaft, the ball is continuously rolled in the circulation path, thereby converting the rotation of the screw shaft into a linear motion, and moving the slide block and its mechanism along the linear rail part. Move. Since the linear motion module is often applied to high-precision machining processes, it is a basic requirement for the quality of the linear motion module that stable and smooth operation can be maintained.

  The conventional linear motion module uses a plurality of screws to fix a pair of pedestals to both ends of the linear rail portion, so that the screw shaft installed between the pair of pedestals and the rail of the linear rail portion Maintains parallelism or collimation with the groove. However, since the tolerance of a normal screw and its corresponding screw hole is between 0.2 mm and 1 mm, there is a relatively large error in collimation after each element is assembled. When the slide block reciprocates linearly in the linear rail portion, the collimation between the screw shaft and the two rail grooves that causes the slide block motion affects the stability and smoothness of the slide block motion. If distortion occurs between the screw shaft and the two rail grooves, the slide block collides with the linear rail portion and the screw shaft in the reciprocating movement path, so that the slide block temporarily stops in high speed motion. Vigorous vibrations or loss of stability cause significant loss to related components.

  Therefore, when assembling a linear motion module, one of the current important issues is how to optimize the collimation between the screw shaft and the rail groove.

  In view of the above problems, the object of the present invention is to have at least two positioning columns on each pedestal, each positioning column engages with its corresponding rail groove, and its tolerance is screw and center It is smaller than the screw hole of the base and the straight rail part. It is an object to provide a linear motion module that secures collimation between a screw shaft and a rail groove by lowering an assembly error between a receiving base and a linear rail portion on the premise that other structures are not affected. .

  To achieve the above object, a linear motion module according to the present invention is installed in a linear rail part having at least two rail grooves, a screw shaft arranged in parallel to the linear rail part, and slidable on the linear rail part. And a slide block provided through the screw shaft, and two receiving bases respectively installed at both ends of the linear rail part, and the receiving base has at least two positioning columns, The positioning column is installed corresponding to the rail groove, and the slide block includes a slide block main body, two end caps installed at both ends of the slide block main body, the slide block main body, and the two end caps. And two dustproof assemblies located at least partially on the straight rail portion. Characterized in that it obtain.

  In one Example, it is provided with a linear rail part, a screw shaft, a slide block, and two receiving bases. The straight rail portion has at least two rail grooves, and the screw shaft is disposed in parallel to the straight rail portion. The slide block is slidably installed on the linear rail portion, and at the same time, the screw shaft penetrates the slide block. The slide block includes a slide block body, two end caps, and two dustproof assemblies. The two end caps are respectively installed at both ends of the slide block main body. The two dustproof assemblies are installed on both sides of the slide block body and the two end caps, respectively, and at least a part of the dustproof assembly is located on the straight rail portion. The two pedestals are respectively installed at both ends of the linear rail portion, and at the same time, each pedestal has at least two positioning columns, and each positioning column is installed correspondingly in each rail groove. .

  In one embodiment, each positioning column engages with each rail groove, and at the same time, the major axis direction of each positioning column is parallel to the major axis direction of each rail groove.

  In one embodiment, each positioning column and the corresponding groove surface of each rail groove are concentric.

  In one embodiment, the plurality of positioning pillars are fitted to both ends of the corresponding rail grooves, and the tolerance is 0 to 0.02 mm.

  In one embodiment, each of the pedestals further includes a bearing holding hole, and both end portions of the screw shaft are respectively screwed into the bearing, and the bearing and the corresponding bearing holding hole are interference fits, and at the same time, an allowable tolerance. Is 0 to 0.02 mm.

  In one embodiment, each of the receiving bases and the plurality of positioning columns are a single part.

  In one embodiment, each pedestal has at least two fixing holes, and each fixing hole and its corresponding positioning column is an interference fit.

  In one embodiment, each pedestal has at least one first screw hole, both ends of the linear rail portion each have at least one second screw hole, and at least one screw is the first screw hole. And each pedestal is screwed into the both ends of a linear rail part by penetrating the 2nd screw hole, It is characterized by the above-mentioned.

  In one embodiment, the groove surfaces of the plurality of rail grooves have a Gothic arch shape.

  In one embodiment, the apparatus further comprises a power module having a motor and a motor holder, wherein the motor holder is connected to the pedestal and at the same time the motor holder and the pedestal are a single part.

  As described above, the linear motion module of the present invention reduces the assembly error between the receiving base and the linear rail portion because the allowable tolerance between the positioning column and the rail groove is smaller than the allowable tolerance between the assembly screw and the screw hole. To provide better collimation between the screw shaft and the rail groove. Compared with a normal linear motion module, the positioning column can optimize the collimation between the screw shaft and the rail groove, thereby ensuring the stability and smoothness of the slide block during the reciprocating motion.

It is a three-dimensional view of a linear motion module according to an embodiment of the present invention. It is an exploded view of the linear motion module shown in FIG. It is the schematic of the positioning pillar and rail groove | channel which concern on the Example of this invention. 1 is a schematic diagram of a local assembly of a linear motion module according to a preferred embodiment of the present invention. 1 is a schematic diagram of a local assembly of a linear motion module according to a preferred embodiment of the present invention. It is a single component schematic diagram of a receiving stand and a positioning column according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the linear motion module shown in FIG. 1 taken along line A-A ′. It is the single component schematic of a motor holder and a receiving stand which concerns on the Example of this invention.

  A linear motion module according to a preferred embodiment of the present invention will be described as follows with reference to the related drawings, in which the same members are denoted by the same reference numerals.

  Please refer to FIG. 1, FIG. 2, FIG. 3A to FIG. 3C and FIG. FIG. 1 is a three-dimensional view of a linear motion module according to an embodiment of the present invention. FIG. 2 is an exploded view of the linear motion module shown in FIG. FIG. 3A is a schematic view of positioning columns and rail grooves according to an embodiment of the present invention. 3B and 3C are local assembly schematic diagrams of a linear motion module according to a preferred embodiment of the present invention. 4 is a cross-sectional view of the linear motion module shown in FIG. 1 taken along the line A-A ′.

  The linear motion module L of the present invention includes a linear rail portion 1, a screw shaft 2, a slide block 3, and two receiving bases 4. The straight rail portion 1 has at least two rail grooves 11, and the screw shaft 2 is disposed in parallel to the straight rail portion 1. The slide block 3 is slidably installed on the linear rail portion 1, and at the same time, the screw shaft 2 penetrates the slide block 3. The slide block 3 includes a slide block main body 31, two end caps 32, and two dustproof assemblies 33. The two end caps 32 are respectively installed at both ends of the slide block main body 31. The two dustproof assemblies 33 are installed on both sides of the slide block main body 31 and the two end caps 32, respectively, and at least a part thereof is positioned on the straight rail portion 1. Both ends of the screw shaft 2 are installed between the two receiving bases 4, and the two receiving bases 4 are installed at both ends E 1 and E 2 of the linear rail portion 1 using the screws S, respectively. Each receiving base 4 has at least two positioning columns 41, and each positioning column 41 is installed correspondingly in each rail groove 11.

  As shown in FIGS. 3A to 3C, each pedestal base 4 has at least two fixing holes 42, and the joining method of each fixing hole 42 and each corresponding positioning column 41 is an interference fit. The cradle 4 has at least one first screw hole O1, the ends P1 and P2 of the two linear rail portions 1 each have at least one second screw hole O2, and at least one screw S is provided. By passing through the first screw hole O1 and the second screw hole O2, each receiving base 4 is screwed into both ends E1, E2 of the linear rail portion 1.

When the cradle 4 and the linear rail portion 1 are assembled, the major axis direction MA ₄₁ of each positioning column 41 of the cradle 4 is parallel to the major axis direction MA ₁₁ of each rail groove 11 of the linear rail portion 1, and each positioning The column 41 engages with both ends P1 and P2 of each rail groove 11, and at the same time, each positioning column 41 has a tolerance of 0.02 mm or less at both ends P1 and P2 of each rail groove 11. The allowable tolerance is smaller than the allowable tolerance between the screw S and the first screw hole O1 and the second screw hole O2, and the screw shaft and the rail groove are secured by ensuring the assembly accuracy of the pedestal 4 and the linear rail portion 1. Have better collimation between.

As shown in FIGS. 3B and 3C, each screw S passes through each first screw hole O1 of the pedestal 4 and each second screw hole O2 of the linear rail portion 1, and at the same time, each screw S and each first screw. The allowable tolerance between the hole O1 and each second screw hole O2 is between 0.02 mm and 1 mm. Each positioning column 41 of the cradle 4 of this embodiment is engaged with each rail groove 11 of the linear rail portion 1 and its allowable tolerance is 0.02 mm or less. Each screw S and each first screw hole O1 and It is much smaller than the allowable tolerance between each second screw hole O2. Therefore, when each screw S passes through each first screw hole O1 of the pedestal 4 and each second screw hole O2 of the linear rail portion 1, a better positioning is achieved by the combination of each positioning column 41 and each rail groove 11. provides an effective, long-axis direction MA _S and screwing direction of the screw S can be secured, by between the long axis direction MA ₄₁ of the alignment pins 41 and the long axis direction MA ₁₁ of the rail grooves 11 Have good collimation.

  As shown in FIG. 2 to FIG. 3C, in this embodiment, each receiving stand 4 further has bearing holding holes OB1 and OB2, and both ends of the screw shaft 2 are screwed into bearings B1 and B2, respectively. The bearings B1 and B2 and their corresponding bearing holding holes OB1 and OB2 are interference fits, and at the same time, the tolerances of the bearings B1 and B2 and their corresponding bearing holding holes OB1 and OB2 are 0 to 0.02 mm. . Since the both ends of the screw shaft 2 and the bearings B1 and B2 are installed in common between the receiving bases 4, the screw shaft 2 is not easily distorted when mounted, and the rail groove 11 of the screw shaft 2 and the linear rail portion 1 The collimation between the two can be ensured.

Therefore, the long axis direction _{MA 41} of each positioning post 41, by the long axis direction MA _S, and screwing direction of the long axis direction _{MA 11,} and the screw S of the rail grooves 11 parallel to each other, the screw shaft 2 length by axial MA ₂ is parallel to the long axis direction MA ₁₁ of the rail grooves 11, the slide block 3 at the time of reciprocating motion, by the strain between the screw shaft 2 and the rail groove 11, straight rail section 1 and the screw It does not hit the shaft 2.

  In assembly, a relatively small tolerance between each positioning column 41 and the rail groove 11 reduces the assembly error between the pedestal 4 and the straight rail portion 1, and further holds each bearing B1, B2 and each bearing. Due to the relatively small tolerance between the holes OB1 and OB2, the screw shaft 2 is hardly distorted when mounted, and stability and smoothness can be ensured when the slide block reciprocates.

As shown in FIG. 3C, the long axis direction MA ₂ of the screw shaft 2 to the axial direction MA ₁₁ of the rail grooves 11, in order to ensure the collimation therebetween, in addition to parallel, in Figure 3A As shown, each positioning column 41 and the corresponding groove surface of each rail groove 11 are further restricted concentrically. Alternatively, as shown in FIG. 4, the design of the groove surface 111 of the plurality of rail grooves 11 of the linear rail portion 1 can be a Gothic arch shape in which two arches are abutted.

  In the present embodiment, a preferable material of the plurality of positioning columns 41 includes iron, steel, or other metals or alloys having similar rigidity. In addition to the configuration shown in FIG. 3A, as shown in FIG. 3D, each receiving base 4 and the plurality of positioning columns 41 may have a single-part structure that is continuously formed of the same material. In FIG. 3D, the bearing B1 is omitted for the sake of brevity.

  As shown in FIGS. 1, 2 and 5, the linear motion module L further includes a power module 5, and the power module 5 includes a motor holder 51 and a motor (not shown). The end of the screw shaft 2 is connected to a motor, and when the motor rotates, the rotational motion of the screw shaft 2 is driven, and the rotation of the screw shaft 2 is converted into linear motion by the linear rail portion 1 and the screw shaft 2. The slide block 3 is driven to reciprocate along the linear rail portion 1. In this embodiment, the motor holder 51 is connected to the pedestal 4 and at the same time, the motor holder 51 and the pedestal 4 are a single component continuously formed of the same material. The cradle 4 has at least two fixing holes 42, and the joining method of each fixing hole 42 and each corresponding positioning column 41 is an interference fit.

  To summarize the above, the linear motion module of the present invention reduces the assembly error between the pedestal and the linear rail portion by a relatively small tolerance between the positioning column and the rail groove, and each bearing and each bearing holding hole. Due to the relatively small tolerances between the screw shafts are less likely to be distorted when installed. Compared with the conventional method that simply relies on the assembly of the screw and the screw hole, the present invention provides a more precise and stable collimation, so that the screw shaft 2 is less likely to be distorted when assembled with the screw and the screw hole. . In addition, stability and smoothness can be further ensured when the slide block reciprocates.

  The above examples are illustrative and not limiting. Any equivalent modifications or changes made without departing from the technical spirit and scope of the present invention shall be included in the appended claims.

  Since the present invention is configured as described above, by providing more precise and stable collimation, the screw and screw are not easily distorted during assembly, and further, the slide block ensures stability and smoothness when reciprocating. It is possible to provide a linear motion module capable of

DESCRIPTION OF SYMBOLS 1 Straight rail part 11 Rail groove 111 Groove surface 2 Screw shaft 3 Slide block 31 Slide block main body 32 End cap 33 Dust-proof assembly 331 Fixing member 332 Dust-proof member 4 Receiving base 41 Positioning column 42 Fixing hole 5 Power module 51 Motor holder L Linear Motion module E1, E2: End part (of the straight rail part) P1, P2: End part (of the rail groove) MA ₁₁ Long axis direction of the rail groove MA ₂ : Long axis direction of the screw shaft MA ₄₁ : Long axis of the positioning column Direction MA _S : Longitudinal direction of screw B1, B2: Bearing OB1, OB2: Bearing holding hole O1 First screw hole O2 Second screw hole S Screw

Claims (10)

A straight rail portion having at least two rail grooves;
A screw shaft arranged in parallel to the straight rail portion;
A slide block that is slidably installed in the linear rail portion and provided through the screw shaft;
Two receiving bases respectively installed at both ends of the linear rail portion,
The pedestal has at least two positioning columns, and the positioning columns are installed corresponding to the rail grooves,
The slide block is
The slide block body,
Two end caps installed at both ends of the slide block body;
A linear motion module comprising: two dustproof assemblies disposed on both sides of the slide block main body and the two end caps, and at least a part of which is positioned on the linear rail portion.   2. The linear motion module according to claim 1, wherein the positioning column engages with the rail groove, and at the same time the major axis direction of the positioning column is parallel to the major axis direction of the rail groove.   The linear motion module according to claim 2, wherein the positioning pillar and the corresponding groove surface of the rail groove are concentric.   2. The linear motion module according to claim 1, wherein the positioning column is aligned with both ends of the corresponding rail groove and has an allowable tolerance of 0 to 0.02 mm.   The pedestal further has a bearing holding hole for holding a bearing, both ends of the screw shaft are screwed into the bearing, respectively, and the bearing and the corresponding bearing holding hole are interference fits. At the same time, the allowable tolerance is 0 to 0.02 mm, the linear motion module according to claim 1.   The linear motion module according to claim 1, wherein the pedestal and the positioning column are a single part.   The linear motion according to claim 1, wherein the pedestal has at least two fixing holes corresponding to the positioning columns, and the fixing holes and the corresponding positioning columns corresponding to the positioning columns are interference fits. module.   The pedestal has a first screw hole, both end portions of the linear rail portion have a second screw hole, and a screw passes through the first screw hole and the second screw hole. The linear motion module according to claim 1, wherein the pedestal is fixed to the both ends.   The linear motion module according to claim 1, wherein the rail groove has a Gothic arch shape.   The straight line according to claim 8, further comprising a power module having a motor and a motor holder, wherein the motor holder is connected to a pedestal and at the same time the motor holder and the pedestal are a single part. Exercise module.

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