TWM610569U - Linear motion device - Google Patents

Abstract

The present disclosure provides a linear motion device including a guiding element extending along a first direction, and a sliding block component slidably engaged on the guiding element. The sliding block component includes a sliding block, two channel elements respectively disposed at opposite sides of the sliding block, two circulation elements respectively disposed at opposite sides of the sliding block along the first direction, and two end covers respectively disposed on the two circulation elements. At least one of the two circulation elements has two reflux channel elements, and each of the reflux channel elements has an upper protruding element and a lower protruding element. The lower protruding element protrudes from the upper protruding element in the top view. Since the portion of the lower protruding element protruding from the upper protruding element can be directly served as a bottom of the reflux channel, there will be no gap between the bottom of the reflux channel and other adjacent parts resulted from the assembly process, so that the balls can move more smoothly.

Description

Linear actuator

This case is about a transmission device, especially a linear transmission device.

Because the linear transmission device only needs to apply minimal power to drive operation and is not easy to generate heat, it has a variety of applicable scenarios, so it has always occupied an important position as a conveying device in various production line equipment or products. At present, various linear transmission devices have been widely used in devices or fields such as computer machinery, semiconductor equipment, conveying and handling machines, machine tools, and automated engineering equipment.

With the continuous development of various devices toward miniaturization, linear transmission devices have gradually generated demand for miniaturization. However, when the linear transmission device is miniaturized, its components are too small to be easily aligned and positioned, which greatly increases the difficulty of assembly and/or leads to poor relative position accuracy between the assembled components, which affects the smooth operation of the transmission device. For example, in some known linear transmission device structures, there are separate sliding blocks, cover plates arranged on both sides of the sliding blocks, and end covers located on the outermost side. However, the assembly between the end cover and the sliding block, or between the end cover and the cover plate, often has a step problem due to difficult alignment. This makes it impossible for this type of linear transmission device to slide smoothly on the ball, which greatly reduces the device yield.

In view of this, this case provides a linear transmission device that can reduce the difficulty of assembly and/or improve the accuracy of the device after assembly.

According to an embodiment of the present application, the linear transmission device includes a guide member extending along the first direction and a slider assembly slidably disposed on the guide member. A track groove is respectively provided on two opposite sides of the guide member parallel to the first direction. The slider assembly includes a slider, two ball passage members, a first circulation member and a second circulation member, a first end cover and a second end cover, a plurality of balls, and two fixers. The sliding block is straddled and slidably arranged on the guide, and the sliding block has two ball grooves respectively corresponding to a track groove, and a track groove and a ball groove jointly form an inner ball channel. Each ball channel piece extends along the first direction and is respectively arranged on opposite sides of the sliding block, and each ball channel piece has an outer ball channel. The first circulation member and the second circulation member are respectively disposed on opposite sides of the slider in the first direction, and are used to communicate with the inner ball channel and the outer ball channel. The first circulation member includes a sheet portion and two return channel members. The sheet-shaped portion abuts against the sliding block and has a stopping plane. The two return channel members protrude from the side of the first circulation member away from the slider. The two return channel members are respectively provided with return curved grooves, and the return curved grooves are communicated with the outer ball passage through the connecting channel. Each return channel component includes an upper protruding piece, a lower protruding piece and a connecting piece, and the connecting piece is connected with the upper protruding piece and the lower protruding piece. Wherein, the longest distance of the upper protruding member extending in the first direction is smaller than the longest distance of the lower protruding member extending in the first direction. The first end cover and the second end cover are respectively installed on the first circulation member and the second circulation member. The first end cover and the second end cover have two assembling grooves on a surface away from the slider. One surface of the first end cover close to the slider is provided with a groove for accommodating the sheet-shaped part, and the groove has a positioning plane that matches with the stop plane and abuts against the stop plane. When the positioning plane of the first end cover corresponds to the stop plane of the sheet portion, the first end cover at least covers the upper protruding member and the connecting member of the return bend groove. Each retainer passes through an inner ball channel, and two ends of each retainer are respectively inserted into the assembly grooves on the first end cover and the second end cover. The two inner ball passages, the first circulation member, the first end cover, the two outer ball passages, the second circulation member and the second end cover together form a second ball circulation channel, and a plurality of balls are rollably accommodated in the second ball circulation channel Inside.

Thereby, the longitudinal position of the end cover can be positioned by the stop plane of the sheet-like part, so that the end cover can cover at least the upper protruding part and the connecting part of the return bend groove, so that the end cover and the return channel part A space is formed for the return of the balls to complete the assembly of the end cover. In addition, because the lower protruding piece protrudes from the upper protruding piece and can be directly used as the bottom surface of the return curve, the bottom part will not have a step difference with other adjacent components due to assembly or component tolerance issues, and can be positioned more accurately At the desired position, the rolling ball is smoother when rolling between the extension member and the return channel member, or between the return channel member and the inner ball channel. Also due to the arrangement of the return channel member, the bottom of the end cover can be designed as an open type, and the assembly direction can be changed from top to bottom, and the assembly can be completed under the positioning of the stop plane.

Therefore, the positioning or installation of the end cap can be completed easily by the aforementioned structure, which effectively reduces the accuracy requirements for assembly, and because the position after installation has been accurately positioned, the overall accuracy of the assembled device can also be Effectively promote.

The technical content of this case will be described in detail below in conjunction with the implementation mode shown in the drawings. The same reference numbers in the drawings indicate the same or similar parts. In addition, the term "two planes co-planar" in this case or a term with its corresponding meaning does not require that the two planes be completely on the same plane, but it may allow the existence of the two planes caused by the process of manufacturing or assembly. Reasonable tolerance.

Please refer to Figure 1 first. Fig. 1 is a three-dimensional schematic diagram of a linear transmission device drawn according to an embodiment of the present case. As shown in FIG. 1, in this embodiment, the linear transmission device includes a guide A extending in the front-rear direction and a slider assembly B straddling and slidably disposed on the guide A. That is, the slider assembly B can be on the guide A and move back and forth along the guide A.

In order to explain this case more clearly, in the drawings provided in this case, the extension direction of the guide A will be referred to as the first direction (ie the X-axis direction shown in the figure, or the front-rear direction); and The direction perpendicular to the first direction on the same plane is called the second direction (ie, the Y-axis direction shown in the figure, or the left-right direction). In addition, the direction perpendicular to the first direction and the second direction at the same time is called the third direction (ie, the Z-axis direction shown in the figure, or the up-down direction).

Next, please refer to FIG. 2 for a detailed description of the structure of the slider assembly B. Fig. 2 is an exploded schematic diagram of the linear transmission device drawn according to an embodiment of the present case. As shown in FIG. 2, in this embodiment, the slider assembly B may include two ball channel members 1, a slider 2, a first circulation member 3a and a second circulation member 3b, a first end cover 4a and a second end A cover 4b, a plurality of balls 5, and two holders 6. The slider 2 is straddled and slidably disposed on the guide member A, and the two ball channel members 1 are each a long tube extending in a first direction (front-rear direction) and having a channel inside, and are respectively arranged on the slider 2 Opposite sides of the left and right. The sliding block 2 has a sleeve opening 21 that cooperates with the guiding piece A, so that the sliding block 2 can be straddled and slidably disposed on the guiding piece A. The sleeve opening 21 faces the guide member A on both sides with concave ball grooves 22, and the guide member A has a track groove A1 on the left and right opposite sides. Each ball groove 22 can be arranged corresponding to the adjacent track groove A1, so that a channel for the ball 5 to pass through can be formed between the slider 2 and the guide A. For the convenience of description, the channel formed by the ball groove 22 and the track groove A1 may be referred to as the "inner ball channel". In contrast, the channel in the ball channel member 1 can be referred to as an "outer ball channel".

In some embodiments, for example, in this embodiment, each of the two ball channel members 1 has a bottom plate 11 extending from the bottom thereof toward the other ball channel member 1, and the slider 2 is disposed between the two ball channel members 1 and abuts Relying on the bottom plate 11 of each ball channel member 1 makes the relative position between the slider 2 and the two ball channel members 1 more stable. The outer side wall of the right ball passage piece 1 may be coplanar with the right side wall of the slider 2, and the outer side wall of the left ball passage piece 1 may be coplanar with the left side wall of the slider 2. Thereby, the overall volume of the slider assembly B can be effectively reduced, and the slider 2 can be supported in the slider assembly B more stably.

Please continue to refer to Figure 2. In this embodiment, after the slider 2 is set on the two ball channel members 1, the first circulation member 3 a and the second circulation member 3 b will be respectively disposed on the front and back sides of the slider 2. Each of the first circulating member 3a and the second circulating member 3b is connected to one end of the two ball channel members 1 respectively. Thereby, the ball channel member 1 and the slider 2 can be fixed and sandwiched between the first circulation member 3a and the second circulation member 3b, and the first circulation member 3a is placed on one side of the slider 2 to make the inner The ball channel communicates with the outer ball channel; the inner ball channel communicates with the outer ball channel through the second circulating member 3b on the other side of the slider 2.

It should be noted that although in this embodiment, the first circulation member 3a and the second circulation member 3b have the same structure. However, in some embodiments, the structure of the first circulation member 3a and the second circulation member 3b may not be the same. That is, in some embodiments, as long as one of the first circulation member 3a and the second circulation member 3b has the partial structure described in this case. However, in order to facilitate the description of the structure in the drawing, in this case, an embodiment in which the first circulation member 3a and the second circulation member 3b have the same structure will be described, so that the first circulation member 3a and the second circulation member 3a have the same structure. 3b can be used as corresponding references. Also, since in this embodiment, the first circulation member 3a and the second circulation member 3b have the same structure, for a more concise description, in the following description, both the first circulation member 3a and the second circulation member 3b The loop member 3 will be collectively referred to or each abbreviated.

Specifically, in this embodiment, each of the circulation members 3 may include two extension members 31, two return channel members 32, and a sheet portion 33. As shown in FIG. 2, the two extension pieces 31 extend from the two ends of the circulation piece 3 facing one side of the two ball passage pieces 1 toward the two ball passage pieces 1, and the two extension pieces 31 are respectively connected to one ball passage piece 1. The two extension members 31 respectively have a connecting channel 311 inside, and the connecting channel 311 communicates with the channel (outer ball channel) in the ball channel member 1 connected to each other, so that the channel in the ball channel member 1 is further extended. In some embodiments, the cross-sectional shape of each of the two extension members 31 is the same as the cross-sectional shape of the ball channel member 1 connected thereto. At this time, the two extension members 31 can be regarded as the entire extension of the two ball channel members 1.

Please continue to refer to Figure 2. In this embodiment, the two extension members 31 each have a tenon member 312 protruding to the two ball channel members 1, and the two ball channel members 1 each have a tenon groove 12 that can be matched with the tenon member 312. The extension piece 31 and the ball channel piece 1 are connected by the tenon piece 312 and the tenon groove 12 (refer to FIG. 4). In this embodiment, the two extension members 31 each have two tenon members 312, and each end of the ball channel member 1 is provided with two tenon grooves 12 respectively. When the first end cover 4a is viewed in the first direction (X-axis direction), the two tenon members 312 are respectively located above and below the connecting channel 311. The tenon member 312 located below the connecting channel 311 can be used to support the ball channel member 1, and the tenon member 312 located above the connecting channel 311 can be used to prevent the ball channel member 1 from turning to the outside of the slider 2. In addition, with the arrangement of the locking member 312 and the locking groove 12, the connecting channel 311 and the channel in the ball channel member 1 can also be quickly positioned. Therefore, with this arrangement, the overall installation efficiency and stability of the slider assembly B can be further increased.

Please continue to refer to Figure 2. In this embodiment, the two return channel members 32 are constructed to protrude from the two ends of the circulating member 3 away from the two ball channel members 1 toward the direction away from the two ball channel members 1. Each of the two return channel members 32 has a return curve 32a to form a semicircular path for connecting the connecting channel 311 in the extension member 31 and the channel formed by the ball groove 22 and the track groove A1 of the guide member A (Inner ball channel).

The circulating member 3 may additionally have a sheet-shaped portion 33 which is located above the two return channel members 32. When the sliding block 2 is sandwiched between the two circulating parts 3, the sheet portion 33 can abut against the sliding block 2. In this embodiment, the side of the sheet portion 33 facing the slider 2 has a fixing protrusion 331 protruding toward the slider 2, and the side of the slider 2 facing the sheet portion 33 has a locking hole 23. The fixing protrusion 331 can be inserted into the locking hole 23 to limit the movement of the slider 2 relative to the sheet portion 33, so that the slider 2 can be better fixed. The sheet portion 33 may further have a through hole 332, which penetrates from the side of the sheet portion 33 away from the slider 2 to the end of the fixing convex portion 331 close to the slider 2. The first end cover 4a and the second end cover 4b may also have locking holes 46 corresponding to the through holes 332 and the locking holes 23, respectively. In this way, the first end cover 4a and the second end cover 4b, and the sheet portion 33 and the slider 2 can be further fixed by a locking member, such as a screw.

The first end cover 4a and the second end cover 4b are respectively installed on the second circulation member 3. In this embodiment, the first end cover 4a and the second end cover 4b have the same structure, so in order to make the description more concise, in the following description, the first end cover 4a and the second end cover 4b will be Collectively or each abbreviated as the end cap 4. The side of the end cover 4 facing the circulating member 3 has a groove 41 matched with the circulating member 3 and two revolving grooves 42 located at both ends of the end cover 4 respectively. The revolving groove 42 has a curved surface. When the end cover 4 is installed on the circulating member 3 and positioned to a predetermined position, it can form a channel for the return of the balls 5 together with the return channel member 32. In addition, the end cover 4 has an assembly groove 43 on the side away from the slider 2, which can be used to accommodate the holder 6. Specifically, the holder 6 may have a holding portion 61 and buckling portions 62 located at both ends of the holding portion 61. The retaining portion 61 of the retainer 6 penetrates the slider 2 through the sleeve opening 21 of the slider 2, and the buckling portions 62 at both ends of the retainer 6 are respectively buckled in the assembly grooves 43 on the two end covers 4, thereby The two end caps 4 can be pressed against the slider 2 to complete the assembly of the slider assembly B, and the ball 5 can be kept within a certain range to prevent it from detaching.

In this embodiment, since the first end cover 4a and the second end cover 4b have the same structure, the first end cover 4a and the second end cover 4b can serve as corresponding reference objects. However, it should be noted that, in fact, only the end cover 4 installed with the circulating member 3 having the structure described in this case needs to have an end cover structure corresponding to the circulating member 3 in this case. Therefore, although in this embodiment, the first end cover 4a and the second end cover 4b have the same structure, it is due to the two circulating members 3 having the aforementioned structure. In contrast, in some embodiments, when the two circulating members 3 have different structures from each other, the structures between the first end cover 4a and the second end cover 4b do not need to be the same. In other words, in the slider assembly B, only one side of the circulating member 3 and the end cover 4 (for example, the first circulating member 3a and the first end cover 4a) can use the structure described in this case. The structure of the circulation member 3 and the end cover 4 on the other side, as long as the guide member A, the two ball channel members 1, the slider 2, the second circulation member 3, and the two end covers 4 can jointly form two ball circulations The channels C are provided on opposite sides of the guide A for the balls 5 to circulate or roll therein.

One implementation aspect of forming the ball circulation channel C will be described below. Please refer to Figure 2 and Figure 3 at the same time. FIG. 3 is a schematic cross-sectional top view of the linear transmission device drawn according to the section line 3-3 in FIG. 1, but the ball 5 in the ball circulation channel C is not shown. As shown in Figure 3, when the assembled slider assembly B is installed on the guide A, the ball groove 22 of the slider 2 and the track groove A1 of the guide A can form an inner ball channel for the ball 5 to pass through. , And the channel in the ball channel member 1 can be regarded as an outer ball channel. The inner ball passage and the outer ball passage are connected by a circulating member 3. By arranging the circulating members 3 at both ends of the slider 2 in the first direction, a return curve can be formed at both ends of a set of corresponding inner ball passages and outer ball passages, so that the entire passage forms a ball circulating passage C. The end cover 4 is used to prevent the balls 5 from falling out during rotation, and the curved surface of the revolving groove 42 of the end cover 4 allows the balls 5 to enter the circulating member 3 and be guided to the next path by revolving. In some embodiments, the ball 5 may be a plurality of discrete balls or a plurality of balls 5 connected in series by a retainer. It should be noted that, in order to make the drawing more concise, the ball 5 will not be drawn in the subsequent drawing.

To further illustrate the arrangement of the end cap 4 on the circulating member 3, please refer to FIGS. 4 and 5. 4 is a three-dimensional schematic diagram of the slider assembly B when the end cap 4 is to be assembled according to an embodiment of the present case, wherein the slider 2 of the slider assembly B is not shown. FIG. 5 is a three-dimensional schematic diagram drawn from another perspective according to the slider assembly B of FIG. 4, in which the two end caps 4 have not been assembled to the slider assembly B.

As shown in Figures 4 and 5, in this embodiment, the left and right ends of the circulating member 3 respectively have return channel members 32 that protrude away from the two ball channel members 1, and the sheet portion 33 is located in the second return channel. Above the channel member 32. The left and right sides of the sheet portion 33 each have a guiding inclined surface 333, and between the two guiding inclined surfaces 333, there is a stopping plane 334 that can be parallel to the bottom surface of the two return channel members 32. The side of the end cover 4 facing the circulating member 3 has a groove 41 matched with the circulating member 3 and two revolving grooves 42 located at both ends of the end cover 4 respectively. Specifically, the groove 41 matched with the circulating member 3 has two positioning inclined surfaces 411 that cooperate with the two guiding inclined surfaces 333, and the groove 41 has a positioning flat surface 412 that cooperates with the stopping plane 334.

Please continue to refer to Figure 4 and Figure 5. With the aforementioned structure, when the end cover 4 is to be installed on the circulating member 3, in addition to pressing the end cover 4 to the circulating member 3 in the front-to-rear direction, the end cover 4 can also be installed as shown in FIG. Install to the circulating part 3 in a top-down manner. Specifically, when the end cover 4 is installed in a top-down manner, first, the two revolving grooves 42 at both ends of the end cover 4 will be sleeved to the two return channel members 32 respectively. Then, since the sheet portion 33 of the circulating member 3 has guiding slopes 333 on the left and right sides, and the groove 41 of the end cover 4 has corresponding positioning slopes 411, the end cover 4 is in contact with the sheet of circulating member 3 After the portion 33, it can be slid to a predetermined lateral position of the end cover by the guidance between the guiding inclined surface 333 and the positioning inclined surface 411. Then, the end cap 4 continues to move downward until its positioning plane 412 is abutted by the stop plane 334 of the sheet portion 33, that is, it reaches the predetermined longitudinal position of the end cap. That is, even if the initial landing position of the end cap 4 is deviated from the predetermined lateral position of the end cap, under the guidance of the structure, the end cap 4 can still be automatically guided during the installation process. Lead to the desired horizontal position of the end cap. Then, as long as the end cover 4 is continuously installed downward, when the end cover 4 is blocked by the stop plane 334, it can be known that the end cover 4 has reached the predetermined longitudinal position of the end cover. At this time, since the two positioning slopes 411 of the end cover 4 are provided in cooperation with the two guiding slopes 333 of the sheet portion 33, the positioning slopes 411 and the guiding slopes 333 on the same side of the guide A are received by the end cover 4. The stopping planes 334 will abut against each other after being blocked, and can also provide the longitudinal positioning function of the 4 part of the end cover.

In other known linear transmission device structures, the end caps can only be installed on the slider assembly in the front-to-back direction (the extension direction of the guide). In the assembly process of the end caps of these linear actuators, it is still necessary to rely on the assembler’s own skills or the special alignment mechanism design of the assembly device to pass the components to be joined (such as the convex and concave) between the components. After alignment, press-fit installation. However, when the components are further miniaturized, as the fault tolerance space is narrower, the assembly difficulty is significantly increased. When there is a slight deviation in the assembly, the relative position of the components inside the assembled slider assembly will be different due to misalignment, or even make it impossible to assemble or engage between the components, resulting in a decrease in the overall accuracy of the slider assembly. Affect the smooth operation of the device and/or reduce assembly efficiency.

However, if the sheet portion 33 described in the present application has the two guiding inclined surfaces 333 and the stopping plane 334 structure between the two guiding inclined surfaces 333, and the end cap 4 corresponding to these structures, Then the end cover 4 can be assembled from top to bottom, so that the end cover 4 can be automatically guided to the desired predetermined position during the assembly process. In this way, even for a micro-actuator that requires high device accuracy, it can still effectively reduce the accuracy requirements for assembly, and because the position after installation has been accurately positioned, the overall accuracy of the assembled device can also be effectively improved , Can also achieve semi-automatic assembly to a certain extent.

Please continue to refer to Figure 4 and Figure 5. In some embodiments, such as this embodiment, when the slider assembly B is viewed in the first direction (the extending direction of the guide member A, that is, the X-axis direction), the two guiding inclined surfaces 333 and the two return channel members 32 are respectively There is an acute angle θ between them. The two acute angles θ on the opposite sides of the guide A can be the same or different, but if the angles of the two acute angles θ are the same, the left and right sides of the end cover 4 can slide at the same rate when assembled, so that The assembly process of the end cap 4 is smoother. In addition, the two guiding inclined surfaces 333 can have the same inclined surface length L, so that the left and right sides of the end cover 4 can have similar installation displacement distances, which also contributes to the smoothness of the assembly process.

Please continue to refer to Figure 4. In this embodiment, on the side of the sheet portion 33 away from the slider 2, there is no component protruding toward the end cover 4. That is, on the side of the sheet portion 33 away from the slider 2, there is no component extending in the front-rear direction (the first direction) to ensure that the end cover 4 can be smoothly covered on the circulating member 3 from top to bottom.

Please continue to refer to Figure 4 and Figure 5, especially Figure 4 of them. In this embodiment, the two return channel members 32 each include an upper protruding member 321, a lower protruding member 322 and a connecting member 323, and the connecting member 323 connects the upper protruding member 321 and the lower protruding member 322. When viewing the end cover 4 in the first direction, the upper protrusion 321 and the lower protrusion 322 are correspondingly located on two opposite sides of the connecting channel 311. Specifically, the upper protrusion 321 is located above the connecting channel 311 on the same side, and the lower protrusion 322 is located below the connecting channel 311 on the same side. Furthermore, in this embodiment, the design is such that the longest distance D1 of the upper protrusion 321 extending in the first direction is smaller than the longest distance D2 of the lower protrusion 322 extending in the first direction.

Therefore, in these embodiments, when viewing the slider assembly B from top to bottom (that is, in the top view), the maximum area of the upper protrusion 321 is smaller than the maximum area of the lower protrusion 322. In other words, in the top view, the upper protrusion 321 will not protrude from the lower protrusion 322. With this feature, when the end cap 4 is assembled to the circulation member 3, the two revolving grooves 42 can be sleeved to the two return channel members 32 more smoothly.

In addition, since the portion of the lower protrusion 322 protruding from the upper protrusion 321 will serve as the bottom surface of the return curve (that is, the semicircular path portion formed by the return channel member 32). When the portion of the lower protrusion 322 larger than the upper protrusion 321 is a part of the single element of the circulation member 3, since two separate elements are not used for cooperative assembly, the return channel member 32 as the part of the bottom surface of the return curve will not be affected. Due to assembly or component tolerance issues, the difference with other adjacent components can be generated, and it can be more accurately positioned at the desired position, so that the ball 5 is between the extension member 31 and the return channel member 32, or the return channel member 32 and the inner When rolling between the ball channels, it can be more smooth. That is, when the lower protruding member 322 of the return channel member 32 protrudes from the upper protruding member 321, the bottom of the revolving groove 42 at both ends of the end cover 4 can be set as an open end (refer to FIG. 5), so that it can The end cap 4 is sleeved on the circulating member 3 in a top-down manner. With this arrangement, because the bottom of the return curve is directly provided by the lower protrusion 322 of the return channel member 32, instead of being provided by the bottom of the revolving groove 42 of the end cover 4, the inside of the extension member 31 The connecting channel 311 and the return curve will not be affected by the step difference between the end cover 4 and the return channel member 32.

In addition, when the slider assembly B is filled with the ball 5, if the lower protrusion 322 of the return channel member 32 protrudes from the upper protrusion 321, the ball 5 can fill the channel in the channel member 1, except for It can be further filled on the return channel member 32. Then, the end cap 4 is covered to the circulating part 3 in the above-mentioned manner from top to bottom, to complete the ball circulation channel C, and make the ball circulation channel C contain the required balls 5, which is helpful for the filling of the balls 5 . At this time, compared to the state where the upper protruding member 321 and the lower protruding member 322 are not provided, or the lower protruding member 322 is not protruding from the upper protruding member 321, if it is necessary to fill in the ball circulation channel C. The required balls 5 must be additionally filled with the balls 5 in the end cap 4 first, and then the end cap 4 and the circulating part 3 must be carefully aligned and assembled to complete the ball circulation channel C. It can be seen from this that if the required balls 5 are to be filled in the ball circulation channel C, the structure of the return channel member 32 with the lower protrusion 322 protruding from the upper protrusion 321 can be used to effectively simplify the assembly difficulty and improve the assembly. Bead efficiency makes the process of automatic bead loading more optimized.

It should be understood that, since the upper protrusion 321 has the same area as the lower protrusion 322 in the upper view, the lower part of the revolving groove 42 of the end cover 4 has a bottom plate extending toward the return channel member 32 (that is, equivalent to the lower The part of the protruding member 322 larger than the upper protruding member 321 is attached to the lower part of the revolving groove 42), so that the end cap 4 can still be arranged on the circulating member 3 from top to bottom. Therefore, this aspect can also be applied to the slider assembly B of this case.

On the other hand, in addition to the two guiding inclined surfaces 333 and the stop plane 334 of the sheet portion 33 described previously, the end cover 4 is positioned to form the return curve, because the bottom surface of the return curve is formed by the return groove The channel 32 is provided by itself rather than formed after being assembled with the end cover 4, so there is no need to further confirm whether the end cover 4 as the bottom surface of the return curve is assembled to the desired position, and it is not even necessary to make the end cover 4 cover the entire return flow. The curved groove 32a provides the bottom surface of the return curve. Specifically, as long as the longitudinal position of the end cover 4 is positioned by the stop plane 334 of the sheet portion 33, the end cover 4 can cover the upper protruding member 321 of the reflux groove 32a and at least part of the connecting member in the front view. 323 (for example, at least half of the connecting members 323) can form a space between the end cover 4 and the return channel member 32 for the return of the balls 5 to complete the assembly of the end cover 4. In other words, when the lower protruding member 322 protrudes from the upper protruding member 321, the positioning of the end cap 4 can be completed only by the stopping plane 334 of the sheet portion 33 and the positioning plane 412 of the groove 41.

Next, please refer to Figure 4. In some embodiments, such as this embodiment, the stopping plane 334 of the sheet portion 33 may be concavely provided with a positioning groove 3341, and the positioning plane 412 may be convexly provided with a positioning convex portion 4121. After the end cover 4 and the circulating member 3 are assembled, the positioning protrusion 4121 will be correspondingly received in the positioning groove 3341. By arranging matching fixing components between the stop plane 334 of the sheet portion 33 and the positioning plane 412 of the end cap 4, the end cap 4 can be prevented from easily moving along when the end cap 4 receives force from the left and right directions. The guiding inclined surface 333 of the sheet portion 33 slides left and right to increase the stability of the end cover 4.

Next, please refer to Figure 5 and Figure 8. FIG. 8 is a three-dimensional schematic diagram drawn from another angle of view according to the slider assembly B of FIG. 1 (the ball is not shown). In this embodiment, the open end is located below the revolving groove 42 at both ends of the end cover 4. That is, the lower part of the revolving groove 42 is directly connected to the outside. Even if the lower part of the revolving groove 42 has a bottom plate extending toward the return channel member 32, the lower part of the revolving groove 42 is still open and can directly communicate with the outside. When the end cap 4 is to be sleeved on the circulating member 3, it can be sleeved on the return channel member 32 from the open end below the turning groove 42. In some embodiments, when the end cap 4 is set on the circulating member 3 (for example, when the positioning plane 412 abuts against the stop plane 334 of the sheet portion 33), the bottom of the end cap 4 can be connected to the lower protruding member The bottom surface of 322 is coplanar. In addition, the shape of the bottom of the revolving groove 42 of the end cover 4 can match the shape of the outer edge of the lower protrusion 322, so that the bottom of the end cover 4 and the bottom surface of the lower protrusion 322 can be more closely attached, and dust, etc. Enter into the ball circulation channel C.

Please continue to refer to Figure 5 and Figure 6. Fig. 6 is a three-dimensional schematic diagram of the linear transmission device drawn according to the section line 6-6 in Fig. 4. In this embodiment, the end cover 4 may have an oil inlet 44 and an abutment plate 413. Specifically, the groove 41 of the end cover 4 has an abutment plate 413 in the groove 41, which may be located at the lower part of the groove 41 and extend toward the sheet portion 33 (extend in the first direction). The length of the abutment plate 413 in the first direction is smaller than the depth of the groove 41 in the first direction. When the end cover 4 is installed on the circulating member 3, the side of the abutting plate 413 close to the sheet portion 33 of the circulating member 3 will abut against the sheet portion 33, so that the sheet portion 33 and the recess of the end cover 4 The grooves 41 collectively form an end cap cavity 414 (as shown in FIG. 6). The end cover 4 is provided with an oil inlet 44 at a position corresponding to the end cover cavity 414, and the oil inlet 44 communicates with the side of the end cover 4 away from the slider 2 and the end cover cavity 414. In addition, the end cover cavity 414 is further communicated with the two revolving grooves 42.

Through the oil inlet 44 and the end cover cavity 414 connected to the two revolving grooves 42, the lubricating oil can be injected from the oil inlet 44 into the end cover cavity 414, and then flow into the end cover cavity 414 to the second revolution. In the groove 42, the lubrication required by the ball 5 when running in the ball circulation channel C is provided to reduce the friction loss between the components, thereby improving the smoothness of the operation of the slider assembly B and the service life of each component. In addition, because the positioning inclined surfaces 411 on both sides of the groove 41 are set in cooperation with the two guiding inclined surfaces 333 of the sheet portion 33, and the positioning plane 412 of the groove 41 is set in cooperation with the stop plane 334 of the sheet portion. When the shaped portion 33 abuts on the abutment plate 413, the two positioning inclined surfaces 411 can be attached to the two guiding inclined surfaces 333, and the positioning plane 412 can be attached to the stopping plane 334 (as shown in FIG. 4). The lubricating oil injected into the cavity 414 of the end cover will not leak out from above or on both sides of the end cover 4. In addition, since the two sides of the groove 41 are positioning inclined surfaces 411, the two sides of the end cover cavity 414 formed by the groove 41 are also inclined surfaces. When the lubricating oil is injected into the end cover cavity 414 from the oil inlet 44 and advances to the left and right sides of the lubricating oil, it can follow the guidance of the positioning inclined surfaces 411 on both sides of the groove 41 and flow down into the second turning groove 42.

Please continue to refer to Figure 5. In this embodiment, each of the two revolving grooves 42 has a concave edge 421 above it. The concave edge 421 can be engaged with the corresponding upper protrusion 321 (that is, the shape of the concave edge 421 can match the shape of the outer edge of the upper protrusion 321), so that the end cap 4 and the return channel member 32 can be separated from each other. The room can be tighter and more stable. The two concave edges 421 may have grooves 4211 respectively, so that the end cover cavity 414 can still communicate with the lower revolving groove 42 through the grooves 4211 when the concave edge 421 and the upper protrusion 321 are correspondingly engaged . In addition, the groove 4211 can also be provided to enable the lubricating oil in the end cover cavity 414 to flow into the lower revolving groove 42 at a relatively slow speed, thereby achieving the effect of long-term lubrication.

Please continue to refer to Figure 5. In this embodiment, the left and right sides of the abutment plate 413 respectively protrude to the two concave edges 421, and the portion of the abutment plate 413 protrudes to the two concave edges 421, the bottom of which abuts against the two return channel members 32, so the abutment plate 413 also has the function of assisting the longitudinal positioning of the end cap 4 at this time. In addition, the left and right sides of the abutment plate 413 can be respectively connected with the two grooves 4211 on the two concave edges 421. That is, the left side of the abutment plate 413 is in contact with the edge of the left groove 4211, and the right side of the abutment plate 413 is in contact with the edge of the right groove 4211. In this way, the lubricating oil in the cavity 414 of the end cover can be assisted to flow into the groove 4211.

In this embodiment, the positioning plane 412 of the end cover 4 is provided with abutting convex points 4122. For example, as shown in FIG. 5, abutting convex points 4122 are respectively provided on the left and right sides of the positioning convex portion 4121 on the positioning plane 412. The abutting protrusion 4122 is used to further abut the sheet portion 33 to maintain the stability of the volume of the end cover cavity 414 (as shown in FIG. 6), so the length of the abutting protrusion 4122 in the first direction and the abutment The length of the plate 413 in the first direction is the same, and the length of the abutting protrusion 4122 in the first direction is smaller than the length of the positioning protrusion 4121 in the first direction.

Please continue to refer to Figure 5. In this embodiment, an abutting member 415 is provided between the positioning slope 411 of the groove 41 and the return channel member 32 on the same side thereof. Specifically, one side of the abutment member 415 abuts against the positioning inclined surface 411, and the other side of the abutment member 415 abuts against the return channel member 32. Therefore, the abutting member 415 can also be used to assist the longitudinal positioning of the end cap 4. In addition, the abutting member 415 can also support the sheet portion 33 on the left and right sides of the sheet portion 33 to assist in maintaining the stability of the volume of the end cover cavity 414. At this time, the length of the abutment 415 in the first direction will be the same as the length of the abutment plate 413 in the first direction, so as to abut the sheet portion 33 at the same time as the abutment plate 413. In addition, in some embodiments, the side surface of the abutting member 415 is in contact with the edge of the adjacent groove 4211, thereby assisting in guiding the lubricating oil in the end cover cavity 414 to flow into the groove 4211.

Next, please refer to Figure 5 and Figure 7. FIG. 7 is a schematic diagram of a front view according to the slider assembly B of FIG. 4. In this embodiment, the two revolving grooves 42 at both ends of the end cover 4 each have an auxiliary wall 422 extending toward the adjacent track groove A1 on the side close to the guide A to extend the curved surface in the revolving groove 42 to In the track groove A1. With this structure, when the ball 5 enters the return curve formed by the return channel member 32 and the revolving groove 42 from the outer ball channel through the connecting channel 311 in the extension member 31, the ball 5 can be more smoothly and stably Lead into the inner ball channel. Conversely, when the ball 5 wants to enter the return curve from the inner ball passage, it can also be guided by the auxiliary wall 422 to enter the return curve more smoothly.

Please continue to refer to Figure 7. In this embodiment, when the end cover 4 is viewed from the first direction (for example, in the front view), the oil inlet 44 of the end cover 4 and the positioning groove 3341 of the sheet portion 33 are arranged in a staggered manner. That is, when the end cap 4 is set on the circulating member 3, the oil inlet 44 does not overlap with the positioning groove 3341, and passes through the upper and lower lines of the center of the oil inlet 44 in the third direction, and is not connected to the center of the oil inlet 44 in the third direction. The upper and lower lines passing through the center of the positioning groove 3341 overlap. With this arrangement, because the positioning protrusion 4121 and the positioning groove 3341 are not directly behind the oil inlet 44, it can reduce the initial pressure when the lubricating oil is injected from the oil inlet 44 directly along the positioning protrusion. The probability that the gap between 4121 and the positioning groove 3341 oozes out.

Next, please refer to Figure 8. As mentioned earlier, when the two end caps 4, the second circulation member 3, the slider 2, and the two ball channel members 1 are set up with each other, the buckle portions 62 at the two ends of the holder 6 can be moved along the two end caps 4, respectively. The assembling slope 45 is pushed into the corresponding assembling slot 43 from below to press the two end covers 4 against the slider 2 to complete the assembly of the slider assembly B. The retaining portion 61 will pass through the slider 2 and be arranged beside the ball groove 22 of the slider 2 to fix the ball 5 (not shown) within a certain range to prevent it from escaping from the slider assembly B.

Specifically, please refer to FIG. 9. FIG. 9 is a front view diagram according to the slider assembly B of FIG. 1, in which the ball 5 and the holder 6 on the right side are not shown. In this embodiment, the assembly groove 43 has a first groove section 431 and a second groove section 432, and the first groove section 431 and the second groove section 432 are in communication with each other. When viewing the end cover 4 in the first direction, the first groove section 431 and the second groove section 432 are perpendicular to each other, and the second groove section 432 is parallel to the positioning plane 412 of the end cover 4. The bottom of the first groove section 431 is an open end, and the end of the second groove section 432 facing the guide A is an open end. The opening of the second groove section 432 may be disposed corresponding to the auxiliary wall 422.

Continue to refer to Figure 9 in conjunction with Figure 10. Fig. 10 is a partial enlarged bottom view of the left front side of the slider assembly B of Fig. 9 (but the guide A is not shown). In this embodiment, the buckle portion 62 of the holder 6 has a buckling section 621 and a stopping section 622. The detent section 621 is located at one end of the stop section 622, and in the bottom view of the slider assembly B, the extension direction of the detent section 621 and the extension direction of the stop section 622 are perpendicular to each other. When the retainer 6 is to be assembled to the assembly groove 43, the buckling section 621 of the buckle portion 62 will be inserted into the first groove section 431 first, and the stop section 622 of the rear buckle portion 62 will move along the assembly slope 45. The second groove section 432 moves and snaps into the second groove section 432 to stop the end cover 4 from being disengaged. At this time, the holding portion 61 of the holder 6 can abut on the auxiliary wall 422 and penetrate into the track groove A1 of the guide A, so the auxiliary wall 422 can be used to support and position the holder 6.

Next, please refer to Figure 9. According to this embodiment, when the end cover 4 is viewed along the first direction, the opening width H1 of the first groove section 431 may be equal to the section bottom width H2 of the first groove section 431. By making the first groove section 431 have this feature, the overall accuracy of the first groove section 431 can be more easily controlled. In addition, as shown in FIG. 10, in the bottom view of the slider assembly B, the width H1' of the end of the first groove segment 431 away from the slider 2 may be smaller than the width H2' of the end of the first groove segment 431 close to the slider 2. . Thereby, the tail end of the deducting section 621 can be quickly positioned at the position to be penetrated due to the wider width at the width H2', and after penetration, the width H1' can be smaller to provide positioning to Correct position and provide a slightly tighter clamping effect.

In summary, the present application provides a linear transmission device, which has two guiding inclined surfaces 333 and a stopping plane 334 of the inner sheet portion 33, and an end cover 4 corresponding to these structures. When the end cover 4 is assembled from top to bottom, even if the initial landing position is misaligned, it can still be slid to a predetermined lateral position under the guidance of the guiding inclined surface 333, and the back end cover 4 continues downward Move until it is blocked by the stopping plane 334 to reach the predetermined longitudinal position, and the installation of the end cover 4 can be completed.

On the other hand, it is also possible to locate the longitudinal position of the end cover 4 only by the stop plane 334 of the sheet portion 33, so that the end cover 4 can cover at least the upper half of the return bend groove, so that the end cover 4 can interact with the return bend. A space for the return of the balls is formed between the channel members 32 to complete the assembly of the end cover 4. In addition, since the lower protrusion 322 protrudes from the upper protrusion 321 and can be directly used as the bottom surface of the return curve, the part of the bottom surface will not have a step difference with other adjacent components due to assembly or component tolerance issues, which can be more accurate The ground is positioned at the desired position, so that the rolling ball 5 can be smoother when rolling between the extension member 31 and the return channel member 32, or between the return channel member 32 and the inner ball channel.

Therefore, the positioning or installation of the end cap can be completed easily by the aforementioned structure, which effectively reduces the accuracy requirements for assembly, and because the position after installation has been accurately positioned, the overall accuracy of the assembled device can also be Effectively promote.

A: guide A1: Track groove B: Slider assembly 1: Channel parts 11: bottom plate 12: Tenon groove 2: slider 21: Sleeve 22: Ball groove 23: Locking hole 3: Loop parts 31: Extension 311: Connect Channel 312: Tenon pieces 32: Return channel parts 32a: return curve 321: Upper protrusion 322: Lower protrusion 323: Connector 33: Flaky part 331: Fixed convex part 332: Through hole 333: Guiding Bevel 334: Stop plane 3341: positioning groove 4: end cap 41: Groove 411: Positioning bevel 412: positioning plane 4121: Positioning convex part 4122: against bump 413: Abutment Board 414: End cap cavity 415: abutment 42: Rotary groove 421: Concave Edge 4211: groove 422: Auxiliary Wall 43: assembly slot 431: first slot segment H1: Segment width H2: Width of the bottom of the paragraph H1’: width H2’: width 432: second slot segment 44: oil inlet 45: Assemble the inclined plane 46: keyhole 5: Ball 6: Fixer 61: Maintenance Department 62: buckle 622: Stop section 621: deduction segment C: Ball circulation channel D1, D2: longest distance θ: acute angle L: Length of slope

In order to make the technical content of the case more clearly understood, the case provides the following diagrams to cooperate with the specification to explain the case in detail as follows. However, the attached drawings are only for reference and explanation, and are not used to limit the scope of protection of this case. Fig. 1 is a three-dimensional schematic diagram of a linear transmission device drawn according to an embodiment of the present case. Fig. 2 is an exploded schematic diagram of the linear transmission device drawn according to an embodiment of the present case. Fig. 3 is a schematic cross-sectional top view of the linear transmission device drawn according to the section line 3-3 in Fig. 1 (the ball is not shown). FIG. 4 is a three-dimensional schematic diagram of the slider assembly when the end cover is to be assembled according to an embodiment of the present case, wherein the slider of the slider assembly is not shown. FIG. 5 is a three-dimensional schematic diagram drawn from another perspective according to the slider assembly of FIG. 4, wherein the two end caps have not been assembled to the slider assembly. Fig. 6 is a three-dimensional schematic diagram of the linear transmission device drawn according to the section line 6-6 in Fig. 4 (only the end cover on one side is drawn). FIG. 7 is a schematic front view (including the slider) drawn according to the slider assembly of FIG. 4. FIG. 8 is a three-dimensional schematic diagram drawn from another perspective according to the slider assembly of FIG. 1 (the ball is not shown). FIG. 9 is a front view schematic diagram according to the slider assembly of FIG. 1, in which the ball and the holder on the right side are not shown. Fig. 10 is a partial enlarged bottom view of the left front side of the slider assembly of Fig. 9;

A: guide

A1: Track groove

1: Channel parts

11: bottom plate

12: Tenon groove

2: slider

21: Sleeve

22: Ball groove

23: Locking hole

3: Loop parts

3a: The first loop piece

3b: The second loop piece

31: Extension

311: Connect Channel

312: Tenon pieces

32: Return channel parts

32a: return curve

33: Flaky part

331: Fixed convex part

332: Through hole

4: end cap

4a: The first end cap

4b: second end cap

41: Groove

42: Rotary groove

43: assembly slot

46: keyhole

5: Rolling unit

6: Fixer

61: Maintenance Department

62: buckle

B: Slider assembly

Claims (10)

A linear transmission device, including: A guide member extending along a first direction, and a track groove on each of two opposite sides of the guide member parallel to the first direction; and A slider assembly slidably disposed on the guide, the slider assembly includes: A slider straddling and slidably disposed on the guide member, the slider having two ball grooves respectively corresponding to the track groove, and the track groove and the ball groove together form an inner ball channel; Two ball channel members, each of the ball channel members extends along the first direction and is respectively disposed on opposite sides of the slider, and each of the ball channel members has an outer ball channel; A first circulating member and a second circulating member are respectively disposed on opposite sides of the slider in the first direction to communicate with the inner ball passage and the outer ball passage; wherein the first circulating member includes: A piece-shaped portion abuts against the slider, the piece-shaped portion has a stopping plane; and Two return channel members protrude from the side of the first circulation member away from the slider. The two return channel members each have a return bend groove, and one return bend groove is connected by a connecting channel and a The outer ball channel is connected; each of the return channel components includes an upper protruding piece, a lower protruding piece and a connecting piece, the connecting piece connects the upper protruding piece and the lower protruding piece; wherein, the upper protruding piece The longest distance extending along the first direction is smaller than the longest distance extending along the first direction of the lower protrusion; A first end cover and a second end cover are respectively installed on the first circulation member and the second circulation member, and the first end cover and the second end cover have two The assembling groove, wherein the first end cover has a groove for accommodating the sheet portion on a surface close to the slider, and the groove has a positioning plane that matches with the stop plane and abuts against the stop plane , When the positioning plane of the first end cover corresponds to the stop plane of the sheet portion, the first end cover at least covers the upper protruding member and the connecting member of the return bend groove; A plurality of balls; and Two retainers, each retainer passes through an inner ball channel, and two ends of each retainer are respectively embedded in the first end cover and an assembly groove on the second end cover; Wherein, the two inner ball passages, the first circulating part, the first end cover, the two outer ball passages, the second circulating part, and the second end cover together form two ball circulating passages, and the plurality of balls The two rolling ball circulation channels can be accommodated in a rolling manner. The linear transmission device according to claim 1, wherein the first circulating member further includes two extension members extending in the first direction from both ends of the first circulating member facing the two ball channel members, each The extension piece has the connecting channel, and each extension piece is connected to a ball channel piece. The linear transmission device according to claim 1, wherein the first end cover includes an abutment plate, an oil inlet and two revolving grooves, and the abutment plate is located in the groove and abuts against the sheet portion, An end cover cavity is formed between the sheet portion and the first end cover, the oil inlet is arranged corresponding to the end cover cavity and communicates with the end cover cavity, and the second rotary groove is located on the left and right of the first end cover Two sides, and the cavity of the end cover communicates with the two revolving grooves. The linear transmission device according to claim 3, wherein the bottom of the abutment plate abuts on the two return channel members, and the two revolving grooves each have a concave edge above them, and the two concave edges and the two upper The protruding parts are correspondingly engaged; the two concave edges respectively have a groove, and the cavity of the end cover and the revolving groove are communicated through the groove. The linear transmission device according to claim 4, wherein each side of the sheet-shaped portion has a guiding inclined surface, the stop plane is located between the two guiding inclined surfaces, and the groove has a matching with the two guiding inclined surfaces And it abuts against two positioning inclined surfaces on the two guiding inclined surfaces. The linear transmission device according to claim 5, wherein the positioning plane of the first end cover is provided with an abutting convex point, the length of the abutting convex point in the first direction and the abutting plate on the second The length in one direction is the same. The linear transmission device according to claim 1, wherein the stopping plane is concavely provided with a positioning groove, the positioning plane is convexly provided with a positioning protrusion, and the positioning protrusion is correspondingly accommodated in the positioning groove. The linear transmission device according to claim 1, wherein both ends of the first end cover respectively have a revolving groove; the side of the revolving groove close to the guide member extends an auxiliary wall toward the adjacent track groove, To extend a curved surface of the revolving groove into the track groove. The linear transmission device according to claim 1, wherein the stop plane is parallel to the bottom surface of the two return channel members, and the bottom surface of the first end cover is coplanar with the bottom surface of the two return channel members. The linear transmission device according to claim 2, wherein each of the two extension pieces has a tenon piece protruding to the two passage pieces, and each of the two passage pieces is provided with a tenon groove, the two extension pieces and the two The channel pieces are connected by the tenon piece and the tenon groove.

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