A clamping device for turning an internal gear ring

Abstract

A clamping device for turning an internal gear ring, comprising a base, on which a clamping mechanism and a supporting mechanism are detachably connected, and the clamping mechanism and the supporting mechanism cooperate with each other to clamp the internal gear ring; the clamping mechanism comprises an inner clamping claw and a transmission member, the inner clamping claw and the supporting mechanism can slide on the base, a wedge-shaped groove is provided on one side of the inner clamping claw, a wedge-shaped block matching the wedge-shaped groove is provided on the transmission member, and the inclined surface of the wedge-shaped block contacts the inclined surface of the wedge-shaped groove in a slidable manner; the transmission member is connected to the base through a threaded rod, and the transmission member is displaced relative to the base by rotating the threaded rod; the base is provided with a limiting groove, and the transmission member is provided with a limiting block matching the limiting groove. The utility model has a simpler structure, a larger jaw stroke and is detachable, which can meet the turning processing requirements of most thin-walled internal gear rings, and solves the problems of complex structure and poor versatility of the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of turning auxiliary devices, in particular to a clamping device used for turning an internal gear ring. Background Art

[0002] With the wide application of internal gear rings, the processing accuracy of internal gear rings is also constantly improving. Due to the structural characteristics of internal gear rings, they are thin-walled parts. Controlling clamping deformation is one of the main difficulties in the processing process. At present, there are three main clamping methods used for processing thin-walled parts:

[0003] One is to turn the chuck jaws into the shape of the clamping position to maximize the contact area between the part and the chuck to reduce clamping deformation. This method can reduce the problem of clamping deformation, but it cannot be completely avoided, and the turned jaws are only suitable for processing one type of part.

[0004] The second is to use a pressure plate to press the thin wall in the vertical direction, so that the pressure does not directly act on the thin wall surface to reduce deformation. This method will block part of the surface to be processed, which is not conducive to part processing.

[0005] The third is to adjust the clamping force of the chuck and reduce the pressure to the critical point of just tightening to reduce the deformation of the thin wall caused by the clamping force. This method will cause the parts to fall due to vibration and other reasons during the turning process due to insufficient clamping force, which is easy to cause danger.

[0006] CN111940772A discloses a clamping device for processing thin-walled parts; wherein a plurality of inner jaws are slidably connected inside a main body, and each inner jaw can slide radially along the main body; a plurality of outer jaws corresponding to each inner jaw are slidably connected outside the main body, and each outer jaw can slide radially along the main body; the right end of the inner jaw pull rod is sleeved inside the outer jaw pull rod; the right end of each inner jaw is respectively matched with an inclined surface at the left end of the inner jaw pull rod, so that the inner jaw can slide along the inclined surface at the left end of the inner jaw pull rod; the right end of each outer jaw is respectively matched with an inclined surface at the left end of the outer jaw pull rod, so that the outer jaw can slide along the inclined surface at the left end of the outer jaw pull rod; and pressure sensors are respectively provided on the inner jaw pull rod and the outer jaw pull rod; the technical problem that thin-walled parts of rotating bodies are easily deformed during clamping and the parts fall off due to insufficient clamping force can be solved.

[0007] However, the device disclosed in the prior art has many components, a complex structure, high production difficulty and cost, and poor versatility. Utility Model Content

[0008] The purpose of the utility model is to provide a clamping device for turning internal gear rings. Compared with the prior art, the clamping device has a simpler structure and can be connected and used with any ordinary lathe, CNC lathe and other machine tools with chuck clamping. The clamping claw has a large stroke and is detachable, which can meet the turning processing needs of most thin-walled internal gear rings, solving the problems of complex structure and poor versatility of the prior art.

[0009] The utility model provides the following solutions

[0010] A clamping device for turning an inner gear ring, comprising a base, on which a clamping mechanism and a supporting mechanism are detachably connected, and the clamping mechanism and the supporting mechanism cooperate with each other to clamp the inner gear ring;

[0011] The clamping mechanism comprises an inner clamping claw and a transmission member, wherein the inner clamping claw and the support mechanism can slide on the base, a wedge-shaped groove is provided on one side of the inner clamping claw, and a wedge-shaped block matching with the wedge-shaped groove is provided on the transmission member, and the inclined surface of the wedge-shaped block contacts with the inclined surface of the wedge-shaped groove in a slidable manner;

[0012] The transmission member is connected to the base through a threaded rod, and the transmission member is displaced relative to the base by rotating the threaded rod;

[0013] The base is provided with a limiting groove, and the transmission member is provided with a limiting block matched with the limiting groove.

[0014] Furthermore, the base is provided with a slide rail, and the inner clamping claw and the supporting mechanism are both provided with a slider matched with the slide rail, and the slider is slidably connected to the slide rail.

[0015] Furthermore, a central groove is provided on the base, and the central groove can accommodate the transmission member. A first threaded hole matching with the threaded rod is provided on the bottom surface of the central groove, and the threaded rod is threadedly connected with the first threaded hole.

[0016] Furthermore, the limiting groove is arranged on the side wall of the central groove, and the limiting block of the transmission member is embedded in the limiting groove and fits with the limiting groove.

[0017] Furthermore, a first sliding block is provided at the bottom of the inner clamping claw, and the first sliding block is slidably connected to the slide rail.

[0018] Furthermore, the support mechanism includes an outer claw and a second slider, the outer claw is provided with a through hole, the second slider is provided with a second threaded hole, and the support mechanism also includes a fastening bolt, which passes through the through hole and is threadedly connected to the second threaded hole.

[0019] Furthermore, there are multiple inner clamping claws, and the number of the supporting mechanisms is the same as that of the inner clamping claws. One inner clamping claw and one supporting mechanism are arranged on the same slide rail.

[0020] Furthermore, the slide rail is radially arranged with the center of the central groove as a virtual center.

[0021] Furthermore, the outer wall of the inner clamping jaw and the inner wall of the outer clamping jaw are arc surfaces, and both the inner clamping jaw and the outer clamping jaw are detachably connected to the base.

[0022] Furthermore, the inner clamping jaws and the outer clamping jaws are provided with bosses for supporting the inner gear ring.

[0023] Compared with the prior art, the utility model has the following advantages:

[0024] 1. The clamping device for turning the internal gear ring provided by the utility model is provided with two sets of inner and outer jaws, and both sets of inner and outer jaws are adjusted manually, which is more conducive to controlling the clamping force to ensure that the parts are not easily deformed during the clamping process.

[0025] 2. The clamping device for turning the internal gear ring provided by the utility model has a simple structure and can be connected and used with any ordinary lathe, CNC lathe or other machine tools with chuck clamping, and the jaw stroke is large, which can meet the turning processing requirements of most thin-walled internal gear rings and has strong versatility; the inner jaw and the outer jaw are both detachably connected to the base, and for internal gear rings of different diameters, the inner jaw and the outer jaw with different curvature surfaces can be replaced, which further enhances the versatility.

[0026] 3. The clamping device for turning the internal gear ring provided by the utility model adopts external auxiliary support and manual clamping of the inner claw for clamping, which ensures the clamping strength and stability of the parts. At the same time, the parts will not be deformed by the unidirectional clamping force, which effectively improves the processing stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Attached Figure 1 This is a schematic diagram of the structure of the clamping device for turning an internal gear ring according to the utility model;

[0029] Attached Figure 2This is an exploded schematic diagram of the structure of the clamping device for turning an internal gear ring according to the utility model;

[0030] Attached Figure 3 This is a schematic cross-sectional view of the structure of the clamping device for turning an internal gear ring according to the utility model;

[0031] Attached Figure 4 It is a structural schematic diagram of the clamping mechanism of the utility model;

[0032] Attached Figure 5 It is a structural schematic diagram of the support mechanism of the utility model;

[0033] Attached Figure 6 This is a schematic diagram of the structure of the clamping mechanism described in Example 2 of the utility model;

[0034] Attached Figure 7 This is a schematic diagram of the structure of the support mechanism described in Example 2 of the utility model.

[0035] In the figure:

[0036] 1-base, 11-slide rail, 12-limiting groove, 13-center groove, 14-first threaded hole, 2-clamping mechanism, 21-transmission member, 211-wedge block, 212-limiting block, 22-inner clamping claw, 221-inner clamping claw body, 222-first slider, 223-wedge groove, 224-first boss, 23-threaded rod, 3-support mechanism, 31-outer clamping claw, 311-through hole, 312-second boss, 32-second slider, 321-second threaded hole, 33-fastening bolt, 4-inner gear ring. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0038] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0039] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0041] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0042] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0043] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0044] Example 1, please refer to Figure 1 As shown, this embodiment provides a clamping device for turning an inner gear ring, including a base 1, on which a clamping mechanism 2 and a supporting mechanism 3 are detachably connected, and the clamping mechanism 2 and the supporting mechanism 3 cooperate with each other to clamp the inner gear ring 4.

[0045] Specifically, see Figure 2 and Figure 3As shown, the base 1 is a cylindrical structure, and may also be other shapes such as a cube; a center groove 13 is provided at the center of the circular top surface of the base 1, and the center of the center groove 13 coincides with the center of the circular top surface of the base 1 on the plane; with the center of the center groove 13 as the virtual center of the circle, a slide rail 11 is radially provided, in this embodiment, there are three slide rails 11, and different numbers may also be provided according to circumstances, and the cross-section of the slide rail 11 is a hollow inverted "T" shape; a limiting groove 12 is provided on the side wall of the center groove 13.

[0046] Specifically, see Figures 2 to 4 As shown, the clamping mechanism 2 includes a transmission member 21, an inner clamping claw 22 and a threaded rod 23. The upper part of the inner clamping claw 22 is an inner clamping claw body 221, and the bottom is a first slider 222. The two can be integrally formed or fixedly connected or detachably connected. The first slider 222 can slide on the slide rail 11; the transmission member 21 is arranged in the central groove 13 and is connected to the base 1 through the threaded rod 23. The bottom surface of the central groove 13 is provided with a first threaded hole 14 that cooperates with the threaded rod 23. The threaded rod 23 is threadedly connected to the first threaded hole 14 and can be screwed in and out of the first threaded hole 14. The transmission member 21 is displaced up and down relative to the base 1 by rotating the threaded rod 14; the A wedge-shaped groove 223 is provided on one side of the inner clamping claw 22, and a wedge-shaped block 211 matching with the wedge-shaped groove 223 is provided on the transmission member 21, and the inclined surface of the wedge-shaped block 211 contacts with the inclined surface of the wedge-shaped groove 223 in a slidable manner. When the transmission member 21 moves, the wedge-shaped block 211 pushes the wedge-shaped groove 223 and then pushes the inner clamping claw 22 to slide along the slide rail 11; the transmission member 21 is also provided with a limit block 212 embedded in the limit groove 12 of the base 1, and fits with the limit groove 12, so as to cooperate with each other to limit the rotation of the transmission member 21 in the central groove 13 and play a self-centering role, so that the centers of the transmission member 21 and the base 1 are located on the same axis.

[0047] Specifically, see Figure 2 and Figure 5 As shown, the support mechanism 3 includes an outer clamping claw 31, a second slider 32 and a fastening bolt 33. The outer clamping claw 31 is provided with a through hole 311, and the second slider 32 is provided with a second threaded hole 321. The fastening bolt 33 passes through the through hole 311 and is threadedly connected with the second threaded hole 321. The second slider 32 is arranged in the slide rail 11. The support mechanism 3 can be loosened by loosening the fastening bolt 33 so that the support mechanism 3 can slide along the slide rail 11, and the position of the support mechanism 3 on the slide rail 11 can be fixed by tightening the fastening bolt 33.

[0048] Specifically, an inner claw 22 and a supporting mechanism 3 are arranged on each slide rail 11, and the outer wall of the inner claw 22 and the inner wall of the outer claw 31 are arc surfaces, which can better fit the thin wall of the inner gear ring 4, and the inner claw 22 and the outer claw 31 are detachably connected to the base 1. For inner gear rings 4 of different diameters, the inner claw 22 and the outer claw 31 with different arc surfaces can be replaced, which has strong versatility.

[0049] When in use, first loosen all the fastening bolts 33 of the supporting mechanism 3 and slide them to a distance from the central groove 13, and screw out the threaded rod 23 to shrink the inner claw 22 of the clamping mechanism 2 to the minimum diameter relative to the virtual center of the circle; put the inner gear ring 4 on the outside of the clamping mechanism 2 and the inside of the supporting mechanism 3, and place the annular end face of the inner gear ring 4 on the top surface of the base 1, and then screw the threaded rod 23 downward. As the threaded rod 23 is screwed in, the transmission member 21 is driven to move axially toward the inside of the central groove 13. The transmission member 21 cooperates with the wedge-shaped recess 223 on the inner side of the inner claw 22 through the wedge block 211 to push the inner claw 22 to slide radially outward. As the inner claw 22 continues to slide outward until all three inner claws 22 contact the inner wall of the inner gear ring 4, stop screwing in the threaded rod 23. After that, one of the support mechanisms 3 is manually pushed to make the inner side of the outer claw 31 contact with the outer wall of the inner gear ring 4, and after contact, the fastening bolts 33 of the support mechanism 3 are tightened to fix the support mechanism 3 on the slide rail 11 of the base 1. The remaining two support mechanisms 3 are fixed by the same operation as above, and after all three support mechanisms 3 are fixed, the threaded rod 23 is screwed in continuously until the clamping force required for processing is reached, and the clamping of the inner gear ring 4 is completed.

[0050] The clamping device for turning the internal gear ring provided in this embodiment is provided with two sets of inner and outer jaws, and both sets of inner and outer jaws are adjusted manually, which is more conducive to controlling the clamping force to ensure that the parts are not easily deformed during the clamping process; the clamping device has a simple structure and can be connected and used with any ordinary lathe, CNC lathe and other machine tools with chuck clamping, and the jaw stroke is large, which can meet the turning processing requirements of most thin-walled internal gear rings; the clamping device adopts external auxiliary support and manual clamping of the inner jaws for clamping, which ensures the clamping strength and clamping stability of the parts, and the parts will not be deformed by the unidirectional clamping force, which effectively improves the processing stability and safety.

[0051] Example 2, please refer to Figure 6 and Figure 7 On the basis of Example 1, the structures of the inner clamping claw 22 of the clamping mechanism 2 and the outer clamping claw 31 of the supporting mechanism 3 are improved.

[0052] Specifically, a first boss 224 is provided on the outer wall of the inner claw 22, and a second boss 312 is provided on the inner wall of the outer claw 31. The top surfaces of the first boss 224 and the second boss 312 are planes and have the same height relative to the base 1. The annular end surface of the inner gear ring 4 can be supported on the first and second bosses.

[0053] When in use, first make the annular end face of the inner gear ring 4 contact with the first boss 224 of one of the inner claws 22, then screw in the threaded rod 23 until all three inner claws 22 contact the inner wall of the inner gear ring 4, then adjust the inner gear ring 4 so that its annular end face contacts with the first boss 224 of all the inner claws 22 to achieve axial positioning; then manually push the supporting mechanism 3 so that the inner side of the outer claw 31 contacts with the outer wall of the inner gear ring 4 while the annular end face of the inner gear ring 4 contacts with the second boss 312 of all the outer claws 31 to achieve axial support of the inner gear ring 4.

[0054] The structure of the inner clamping claw 22 and the outer clamping claw 31 provided in this embodiment can prevent the inner gear ring 4 from directly contacting the base 1 and causing damage to the base 1 during the processing; the inner gear ring 4 is only in direct contact with the inner clamping claw 22 and the outer clamping claw 31, and when the inner and outer clamping claws are damaged, only the inner and outer clamping claws need to be replaced, which is convenient for replacement and saves costs.

[0055] 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 of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A clamping device for turning an internal gear ring, characterized in that: It comprises a base (1), on which a clamping mechanism (2) and a supporting mechanism (3) are detachably connected, and the clamping mechanism (2) and the supporting mechanism (3) cooperate with each other to clamp the inner gear ring (4); The clamping mechanism (2) comprises an inner clamping claw (22) and a transmission member (21); the inner clamping claw (22) and the supporting mechanism (3) can slide on the base (1); a wedge-shaped groove (223) is provided on one side of the inner clamping claw (22); a wedge-shaped block (211) matching with the wedge-shaped groove (223) is provided on the transmission member (21); the inclined surface of the wedge-shaped block (211) contacts with the inclined surface of the wedge-shaped groove (223) in a slidable manner; The transmission member (21) is connected to the base (1) via a threaded rod (23), and the transmission member (21) is displaced relative to the base (1) by rotating the threaded rod (23); The base (1) is provided with a limiting groove (12), and the transmission member (21) is provided with a limiting block (212) matched with the limiting groove (12).

2. The clamping device for turning an internal gear ring according to claim 1, characterized in that: The base (1) is provided with a slide rail (11), and the inner clamping claw (22) and the support mechanism (3) are both provided with a sliding block that matches the slide rail (11), and the sliding block is slidably connected to the slide rail (11).

3. The clamping device for turning an internal gear ring according to claim 2, characterized in that: The base (1) is provided with a central groove (13), the central groove (13) can accommodate the transmission member (21), the bottom surface of the central groove (13) is provided with a first threaded hole (14) matching with the threaded rod (23), and the threaded rod (23) is threadedly connected to the first threaded hole (14).

4. The clamping device for turning an internal gear ring according to claim 3, characterized in that: The limiting groove (12) is arranged on the side wall of the central groove (13), and the limiting block (212) of the transmission member (21) is embedded in the limiting groove (12) and fits with the limiting groove (12).

5. The clamping device for turning an internal gear ring according to claim 2, characterized in that: A first sliding block (222) is provided at the bottom of the inner clamping claw (22), and the first sliding block (222) is slidably connected to the slide rail (11).

6. The clamping device for turning an internal gear ring according to claim 3, characterized in that: The support mechanism (3) comprises an outer clamping claw (31) and a second sliding block (32), the outer clamping claw (31) is provided with a through hole (311), the second sliding block (32) is provided with a second threaded hole (321), and the support mechanism (3) further comprises a fastening bolt (33), the fastening bolt (33) passes through the through hole (311) and is threadedly connected to the second threaded hole (321).

7. The clamping device for turning an internal gear ring according to claim 2, characterized in that: There are a plurality of inner clamping claws (22), and the number of the supporting mechanisms (3) is the same as that of the inner clamping claws (22). One inner clamping claw (22) and one supporting mechanism (3) are arranged on the same slide rail (11).

8. The clamping device for turning an internal gear ring according to claim 6, characterized in that: The slide rail (11) is arranged radially with the center of the central groove (13) as a virtual circle center.

9. The clamping device for turning an internal gear ring according to claim 6, characterized in that: The outer wall of the inner clamping claw (22) and the inner wall of the outer clamping claw (31) are arc surfaces, and both the inner clamping claw (22) and the outer clamping claw (31) are detachably connected to the base (1).

10. The clamping device for turning an internal gear ring according to claim 9, characterized in that: The inner clamping claw (22) and the outer clamping claw (31) are provided with bosses for supporting the inner gear ring (4).

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