Arc crossed anti-creep guide rail pair

Abstract

The invention provides an arc crossed anti-creep guide rail pair which comprises two guide rails which are oppositely arranged in parallel, arc-shaped V-groove rails are arranged on the opposite faces of the two guide rails in the length direction, U-shaped grooves are formed in the bottoms of the arc-shaped V-groove rails, and racks are arranged in the U-shaped grooves. A retainer consistent with the arc-shaped V-groove track in radian is arranged between the two guide rails, a gear meshed with the rack is installed in the middle of the retainer through a gear carrier, a plurality of position holes are formed in the two sides of the gear carrier, and rolling bodies making contact with the arc-shaped V-groove track are placed in the position holes. Limiting fixing pieces used for fixing the racks are installed at the two ends of the two guide rails. The racks are additionally arranged on the two guide rails, and the gears meshed with the racks are mounted on the retainers through the gear carriers, so that when the guide rails move, the gears and the racks can be matched to drive the retainers and the guide rails to run synchronously, the situation of dislocation of the retainers and the guide rails is avoided, and the running precision of the arc crossed anti-creep guide rail pair is improved.

Description

Technical Field

[0001] The invention relates to the technical field of guide rails, and in particular to an arc cross anti-creep guide rail pair. Background Art

[0002] A guide pair is a mechanical transmission device, mainly composed of a guide rail and a cage, used to guide moving parts to move in a specific direction. The design of the guide pair enables the moving parts to move smoothly and accurately along a straight or curved track, and is widely used in various mechanical devices, such as machine tools, automatic production lines, etc.

[0003] The existing guide rail pair has the problem of poor machining accuracy. The main reason is that during the operation of the guide rail and the cage, the cage is difficult to keep in sync with the guide rail under the push of the roller. As the guide rail pair operates, the relative displacement between the guide rail and the cage gradually increases, which reduces the machining accuracy of the guide rail pair. Summary of the invention

[0004] The invention provides an arc cross anti-creep guide rail pair, which is used to solve the problem of asynchronism between a retainer and a guide rail during operation of the guide rail pair in the prior art.

[0005] The present invention provides an arc cross anti-creep guide rail pair, comprising two relatively parallel guide rails, arc V-groove tracks are provided on the opposite surfaces of the two guide rails along the length direction, a U-shaped groove is provided at the bottom of the arc V-groove track, and a rack is provided in the U-shaped groove. A retaining frame having the same curvature as the arc V-groove track is provided between the two guide rails, a gear meshing with the rack is installed in the middle of the retaining frame through a gear rack, a plurality of position holes are provided on both sides of the gear rack, and rolling bodies contacting the arc V-groove track are placed in the position holes. Position limiting fixings for fixing the rack are installed at both ends of the two guide rails.

[0006] Optionally, the rolling body is a cylindrical roller, two adjacent rollers are arranged crosswise, and the end faces and cylindrical surfaces of the rollers are in contact with the two side faces of the arc-shaped V-groove track respectively.

[0007] Optionally, a plurality of mounting holes are provided on any side surface of the guide rail except the arc-shaped V-groove track.

[0008] Optionally, circular holes for installing limiting fixing members are provided on both end surfaces of the guide rail.

[0009] Optionally, the limiting fixing member includes a baffle plate, a slot is formed on the baffle plate, and the baffle plate is fastened to the end surface of the guide rail after the screw passes through the slot and matches with the round hole. The two ends of the rack extend out of the two ends of the U-shaped groove and are inserted into the slot, and the screw presses the end of the rack to constrain it.

[0010] Optionally, a rectangular groove for mounting the gear rack is provided in the middle of the retaining frame.

[0011] Optionally, two protrusions are respectively connected to the two end surfaces of the gear rack, and the gear rack is clamped with the rectangular groove through the protrusions.

[0012] Optionally, a cross-shaped gear groove is provided on the gear rack, the rotating shaft portion of the gear is installed in the vertical portion of the gear groove, and the tooth plate portion of the gear is placed in the horizontal portion of the gear groove.

[0013] Optionally, the rack is a hollow cylindrical tooth shape.

[0014] Optionally, the guide rail is made of stainless steel.

[0015] The beneficial effects of the circular arc cross anti-creep guide rail pair provided by the present invention include: 1. By adding racks on the two guide rails and installing gears that mesh with the racks on the retaining frame through the gear frame, when the guide rails move, the gears and racks can cooperate to drive the retaining frame and the guide rails to run synchronously, avoiding the occurrence of misalignment between the two and improving the operation accuracy of the circular arc cross anti-creep guide rail pair.

[0016] 2. By using rollers as rolling elements, the guide rail has good guiding properties, thereby improving the positioning accuracy of the guide rail. And because the contact area between the ball and the arc V-groove track is large, the guide rail can withstand a larger load to adapt to high-load applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the overall structure of the arc cross anti-creep guide rail pair provided in an embodiment of the present invention in a moving state;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure from another perspective;

[0020] Figure 3 A schematic diagram of the overall structure of the arc cross anti-creep guide rail pair provided by an embodiment of the present invention in another motion state;

[0021] Figure 4 for Figure 3 Schematic diagram of the structure from another perspective;

[0022] Figure 5 An exploded view of a guide rail provided in an embodiment of the present invention;

[0023] Figure 6 An exploded view of a retainer provided in accordance with an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1-guide rail, 2-cage, 11-arc V-groove track, 12-U-shaped groove, 13-rack, 14-limit fixing piece, 15-mounting hole, 16-round hole, 21-gear rack, 22-gear, 23-position hole, 24-rolling body, 25-rectangular groove, 141-baffle, 142-slot, 143-screw, 211-bump, 212-gear groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present invention.

[0027] like Figure 1-6 As shown, an arc cross anti-creep guide rail pair includes two relatively parallel guide rails 1, arc V-groove tracks 11 are provided on the opposite surfaces of the two guide rails 1 along the length direction, a U-shaped groove 12 is provided at the bottom of the arc V-groove track 11, and a rack 13 is provided in the U-shaped groove 12. A retaining frame 2 with the same curvature as the arc V-groove track 11 is provided between the two guide rails 1, a gear 22 meshing with the rack 13 is installed in the middle of the retaining frame 2 through a gear rack 21, and a plurality of position holes 23 are provided on both sides of the gear rack 21, and rolling bodies 24 in contact with the arc V-groove track 11 are placed in the position holes 23. Position limit fixings 14 for fixing the rack 13 are installed at both ends of the two guide rails 1.

[0028] The circular arc cross anti-creep guide pair is composed of two relatively parallel guide rails 1 and an arc-shaped retaining frame 2, and utilizes the rolling of the rolling body 24 on the retaining frame 2 to perform arc-shaped reciprocating motion.

[0029] When in use, the rack 13 is installed in the U-shaped groove 12, and is limited and fixed by the limit fixing parts 14 installed on the two end surfaces of the guide rail 1 to prevent the rack 13 from escaping from the U-shaped groove 12 during use. The gear rack 21 with the gear 13 installed is installed in the middle of the retaining frame 2, and a plurality of rolling bodies 24 are symmetrically placed on the position holes 23 on both sides of the gear rack 21, thereby completing the assembly of the retaining frame 2. After the retaining frame 2 is assembled, the retaining frame 2 is placed on a side plane of any guide rail 1 with an arc-shaped V-groove track 11, so that the rolling body 24 can complete rolling on the rolling body 24. At the same time, when placing the retaining frame 2, the gear 22 must also be meshed with the rack 13 in the U-shaped groove 12. After the retaining frame 2 is placed on one guide rail 1, another guide rail 1 is installed in conjunction with the retaining frame 2. The matching installation is to install the two guide rails 1 with the arc V-groove tracks 11 on one side opposite to the other, so that the rolling elements 24 on the retainer 2 can roll on the arc V-groove tracks 11 on the two guide rails 1 at the same time. At the same time, the arc V-groove tracks 11 also need to mesh with the racks 13 in the two guide rails 1 at the same time.

[0030] The arc cross anti-creep guide pair can be used after being assembled. When in use, the arc reciprocating motion between the two guide rails 1 is completed by the rolling of the rolling body 24 on the arc V-groove track 11. When the reciprocating motion is generated between the two guide rails 1, the retaining frame 2 also moves on the arc V-groove track 11. On the one hand, the retaining frame 2 moves under the push of the rolling body 24, and also moves under the transmission of the gear 22 meshing with the rack 13. The gear 22 is installed on the gear rack 21, and the gear rack 21 and the retaining frame 2 are kept fixed after the arc cross anti-creep guide pair is assembled, and no relative displacement will occur between the two. Therefore, when the retaining frame 2 moves, the gear 22 will cooperate with the rack 13 to drive the retaining frame 2 to move, thereby ensuring that the retaining frame 2 keeps synchronization with the guide rail 1 during the movement without misalignment. The appearance of the two guide rails 1 can be cut and polished by themselves according to the plane or workpiece to be installed, as long as the arc V-groove track 11 on the two guide rails 1 is consistent.

[0031] The arc cross anti-creep guide pair provided by the present invention has racks 13 added to the two guide rails 1, and a gear 22 meshing with the rack 13 is installed on the retaining frame 2 through the gear frame 21. When the guide rail 1 moves, the gear 22 and the rack 13 can cooperate to drive the retaining frame 2 and the guide rail 1 to run synchronously, avoiding the misalignment of the two and improving the operation accuracy of the arc cross anti-creep guide pair.

[0032] Furthermore, the rolling body 24 is a cylindrical roller, and two adjacent rollers are arranged crosswise, and the end surface and cylindrical surface of the roller are in contact with the two side surfaces of the arc-shaped V-groove track 11 respectively.

[0033] Rollers are selected as the rolling bodies 24. The rollers form linear contact with the arc V-groove track 11, and compared with the point contact of the ball, the rollers have higher rigidity. At the same time, due to the large contact area between the ball and the arc V-groove track 11, the guide rail 1 can withstand a larger load to adapt to high-load applications. Using rollers as the rolling bodies 24 also has good guiding properties, which can improve the positioning accuracy of the guide rail 1.

[0034] like Figure 2-4 As shown, further, a plurality of mounting holes 15 are provided on any side surface of the guide rail 1 except the arc-shaped V-groove track 11 .

[0035] The mounting hole 15 is used to connect the guide rail 1 to other devices that need to perform arc-shaped reciprocating motion.

[0036] like Figure 5 As shown, further, both end surfaces of the guide rail 1 are provided with round holes 16 for installing the position-limiting fixture 14. Further, the position-limiting fixture 14 includes a baffle 141, and a clamping groove 142 is provided on the baffle 141. The baffle 141 is fastened to the end surface of the guide rail 1 by screws 143 passing through the clamping groove 142 and then cooperating with the round hole 16. The two ends of the rack 13 extend out of the two ends of the U-shaped groove 12, and are inserted into the clamping groove 142, and the ends of the rack 13 are pressed by the screws 143 to constrain them.

[0037] Both ends of the rack 13 extend to the outside of the U-shaped groove 12 and are inserted into the slot 142 on the baffle 141. The slot 142 can restrain the rack 13 to prevent the rack 13 from shaking up and down in the U-shaped groove 12. The baffle 141 needs to be close to the end surface of the guide rail 1, and the baffle 141 is fixed to the guide rail 1 by the screw 143 and the circular hole 16. The end of the screw 143 is set to be round, which can cover the slot 142.

[0038] like Figure 6 As shown, further, a rectangular groove 25 for mounting the gear frame 21 is provided in the middle of the retaining frame 2. Further, two protrusions 211 are connected to each of the two end faces of the gear frame 21, and the gear frame 21 is engaged with the rectangular groove 25 through the protrusions 211. Further, a cross-shaped gear groove 212 is provided on the gear frame 21, the shaft part of the gear 22 is installed in the vertical part of the gear groove 212, and the tooth part of the gear 22 is placed in the horizontal part of the gear groove 212. Further, it is characterized in that the rack 13 is a hollow cylindrical tooth shape in the middle.

[0039] A gear slot 212 for placing the gear 22 is provided in the middle of the gear rack 21. The gear slot 212 is cross-shaped, wherein the vertical slot (i.e., the slot opened along the width direction of the gear rack 21, hereinafter referred to as the vertical slot) is used to place the shaft portion of the gear 22. Concavities matching the shaft of the gear 22 are provided on both side walls of the vertical slot for placing the shaft. The horizontal slot (i.e., the slot opened along the length direction of the gear rack 21, hereinafter referred to as the horizontal slot) is used to place the toothed portion of the gear 22.

[0040] The size of the rectangular groove 25 opened in the middle of the retaining frame 2 is the same as that of the gear frame 21 .

[0041] Two protrusions 211 are provided on the end faces of both sides of the gear rack 21. The gear rack 21 and the rectangular groove 25 are connected in a snap-fit ​​manner through the protrusions 211. And because the cross-sectional size of the rectangular groove 25 is the same as that of the gear rack 21, when the gear rack 21 and the rectangular groove 25 are snap-fitted, there will be no shaking between the two. And the gear rack 21 and the gear 22 can be replaced according to the specific usage.

[0042] Furthermore, the guide rail 1 is made of stainless steel.

[0043] The following is the complete use process of the arc cross anti-creep guide rail pair provided by the present invention:

[0044] The arc cross anti-creep guide rail pair is first assembled when in use: the rack 13 is installed in the U-shaped groove 12, and then the baffle 141 is tightly attached to the two side end faces of the guide rail 1, so that the rack 13 is inserted into the slot 142 on the baffle 141. At the same time, the slot 142 needs to be aligned with the circular hole 16 on the end face of the guide rail 1. After the alignment is completed, the screw 143 is passed through the slot 142 and matched with the circular hole 16, so that the baffle 141 is fastened to the end face of the guide rail 1. The baffles 141 on the end faces of the two parallel guide rails 1 are installed according to this step.

[0045] Select rollers as rolling bodies 24, and install the rollers in a cross-arranged manner on the position holes 23, and the rollers on both sides of the gear frame 21 must be symmetrical. Then install the gear 22 on the gear groove 212 on the gear frame 21. Then, the gear frame 21 is clamped with the rectangular groove 25 (retaining frame 2) through the protrusions 211 on both sides of the gear frame 21. It should be noted that the selected gear 22 needs to mesh with the rack 13 in the U-shaped groove 12. The end face and cylindrical surface of the roller selected as the rolling body 24 must be in contact with the two side walls of the arc-shaped V-groove track 11 to facilitate the rolling of the rolling body 24.

[0046] The assembled guide rail 1 can be connected to other devices that need to perform arcuate reciprocating motion through the mounting hole 15. The arcuate reciprocating motion can be completed by matching and mounting the two guide rails 1 and the retaining frame 2.

[0047] When reciprocating motion occurs between the two guide rails 1, the retainer 2 also moves on the arc V-groove track 11. The retainer 2 moves under the push of the rolling body 24, and also moves under the transmission of the gear 22 meshing with the rack 13. The gear 22 is installed on the gear rack 21. After the arc cross anti-creep guide rail pair is assembled, the gear rack 21 and the retainer 2 are kept fixed, and no relative displacement occurs between the two. Therefore, when the retainer 2 moves, the gear 22 will cooperate with the rack 13 to drive the retainer 2 to move, thereby ensuring that the retainer 2 keeps synchronization with the guide rail 1 and does not misalign during the movement.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features therein may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circular arc cross anti-creep guide rail pair, characterized in that: It comprises two guide rails (1) arranged in parallel with each other, wherein the two guide rails (1) have arc-shaped V-groove rails (11) formed on the opposite surfaces thereof along the length direction, and the bottom of the arc-shaped V-groove rails (11) has a U-shaped groove (12), and a rack (13) is arranged in the U-shaped groove (12); A retaining frame (2) having the same curvature as the arc-shaped V-groove track (11) is arranged between the two guide rails (1); a gear (22) meshing with the rack (13) is installed in the middle of the retaining frame (2) through a gear frame (21); a plurality of position holes (23) are provided on both sides of the gear frame (21); rolling bodies (24) in contact with the arc-shaped V-groove track (11) are placed in the position holes (23); Both ends of the two guide rails (1) are provided with position limiting fixing members (14) for fixing the racks (13).

2. The arc cross anti-creep guide rail pair according to claim 1, characterized in that: The rolling bodies (24) are cylindrical rollers, and two adjacent rollers are arranged crosswise, and the end faces and cylindrical surfaces of the rollers are in contact with the two side faces of the arc-shaped V-groove track (11) respectively.

3. The arc cross anti-creep guide rail pair according to claim 1, characterized in that: A plurality of mounting holes (15) are provided on any side surface of the guide rail (1) except the arc-shaped V-groove track (11).

4. The arc cross anti-creep guide rail pair according to claim 1, characterized in that: Circular holes (16) for mounting the position-limiting fixing member (14) are provided on both end surfaces of the guide rail (1).

5. The arc cross anti-creep guide rail pair according to claim 4, characterized in that: The position-limiting fixing member (14) comprises a baffle (141), a slot (142) is provided on the baffle (141), and the baffle (141) is fastened to the end surface of the guide rail (1) by a screw (143) passing through the slot (142) and then cooperating with the circular hole (16); The two ends of the rack (13) extend out of the two ends of the U-shaped groove (12) and are inserted into the clamping groove (142), and the ends of the rack (13) are pressed by the screws (143) to constrain them.

6. The arc cross anti-creep guide rail pair according to claim 1, characterized in that: A rectangular groove (25) for mounting the gear rack (21) is provided in the middle of the retaining frame (2).

7. The arc cross anti-creep guide rail pair according to claim 6, characterized in that: Two end surfaces of the gear frame (21) are respectively connected to two protrusions (211), and the gear frame (21) is clamped with the rectangular groove (25) via the protrusions (211).

8. The arc cross anti-creep guide rail pair according to claim 7, characterized in that: The gear frame (21) is provided with a cross-shaped gear groove (212), the rotating shaft portion of the gear (22) is installed in the vertical portion of the gear groove (212), and the tooth plate portion of the gear (22) is placed in the horizontal portion of the gear groove (212).

9. The arc cross anti-creep guide rail pair according to any one of claims 1 to 8, characterized in that: The rack (13) is in the shape of a hollow cylindrical tooth.

10. The arc cross anti-creep guide rail pair according to any one of claims 1 to 8, characterized in that: The guide rail (1) is made of stainless steel.

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