Automatic centering gear grinding clamp

Abstract

The utility model discloses an automatic centering gear grinding clamp which comprises a clamp base, a movable chuck matched with the clamp base and a locking rod structure used for connecting the clamp base and the movable chuck. According to the device, a positioning mode of the centering rod is adopted, the centering rod is inserted into the axis of the gear, automatic and rapid positioning of the gear is completed, pressing is conducted through the movable chuck above the centering rod, locking is conducted through the locking rod structure, the gear is prevented from coaxially rotating along the positioning rod, and machining reliability is ensured; the device can be matched with a lathe and a milling machine and is suitable for popularization and use.

Description

Technical Field

[0001] The utility model relates to an automatic centering gear grinding fixture. Background Art

[0002] When grinding gears, the gears need to be clamped. Some gears have a center axis at the axis center, and such gears can be directly clamped by grinding machines and other processing equipment. Some gears do not have a center axis at the axis center, but a through hole. The processing and clamping of such gears require special fixtures. The prior art uses a special chuck. This type of chuck uses more than three claws that slide outward along the chuck diameter line, and the gears are clamped by multiple claws moving from the center to the outside. During the clamping process, the centering effect of the gear is relatively poor, resulting in eccentric wear during gear grinding.

[0003] Based on the above problems, we designed an automatic centering gear grinding fixture which can realize rapid positioning of gears. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an automatic centering gear grinding fixture which can realize the rapid positioning of the gear.

[0005] The utility model is realized by the following technical solutions:

[0006] An automatic centering gear grinding fixture comprises a fixture seat, a movable chuck matched with the fixture seat, and a locking rod structure used for connecting the fixture seat and the movable chuck.

[0007] Preferably, the clamp seat has a conical centering rod, the diameter of which gradually decreases upward, and a threaded hole for assembling the locking rod structure is provided at the axis of the centering rod. The threaded hole penetrates the centering rod downward, and a clamping rod is cooperated with the threaded hole at the bottom of the centering rod, and the chuck is coaxial with the centering rod; a plurality of clamping openings are provided in a ring shape on the outer side of the clamp seat.

[0008] Preferably, the movable chuck includes a chuck, which is coaxial with the centering rod, and a plurality of positioning rods for positioning the processed gear are arranged in a ring at the bottom of the chuck, and a bracket body is arranged on the top of the chuck, and a through hole through the locking rod structure is arranged at the middle position of the bracket body, and the locking rod structure is screwed into the threaded hole after passing through the through hole, and the chuck has an axial hole, and the aperture of the axial hole is larger than the large end diameter of the centering rod.

[0009] Preferably, a threaded portion is disposed at the upper end of the positioning rod, and a first threaded hole for assembling the threaded portion is disposed at the bottom of the chuck.

[0010] Preferably, the positioning rod is a tapered rod, and the diameter of the positioning rod gradually decreases downward.

[0011] Preferably, the locking rod structure includes a locking rod body, the upper end of the locking rod body is provided with a polygonal force-bearing end, the surface of the locking rod body is processed with an external threaded portion that matches the threaded hole, the locking rod body passes through the through hole, and the part of the locking rod body that passes through the through hole is the smooth rod part, and the smooth rod part is transitionally matched with the through hole.

[0012] Preferably, the surface of the clamping rod is processed to form a knurled portion for anti-slip.

[0013] Preferably, the clamping opening is U-shaped.

[0014] The beneficial effects of the utility model are as follows: the device adopts a positioning method of a centering rod, the centering rod is inserted into the axis of the gear, the gear is automatically and quickly positioned, and then pressed by the movable chuck above, and locked by the locking rod structure, thereby avoiding the coaxial rotation of the gear along the positioning rod, thereby ensuring the reliability of processing; secondly, the device can not only cooperate with grinders, but also with lathes and milling machines, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the clamping of the utility model;

[0017] Figure 2 is a schematic diagram of the structure of the gear being processed;

[0018] Figure 3 It is a structural schematic diagram of the device;

[0019] Figure 4 This is the structural explosion diagram of the device;

[0020] Figure 5 is a top view of the fixture seat;

[0021] Figure 6 It is the front view of the movable chuck;

[0022] Figure 7 A bottom view of the movable chuck;

[0023] Figure 8 A top view of the movable chuck. DETAILED DESCRIPTION

[0024] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0025] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0026] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, in the description of the present invention, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "set", "socket", "connect", "penetrate", "plug in" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 and Figure 2 The automatic centering gear grinding fixture shown comprises a fixture base 1, a movable chuck 2 matched with the fixture base 1, and a locking rod structure 3 for connecting the fixture base 1 and the movable chuck 2.

[0030] The clamped gear 4 is centered by the clamp seat 1, clamped at the upper end by the movable clamping plate 2, and then locked by the locking rod structure 3.

[0031] When turning is performed on a lathe, the fixture seat 1 is fixed to the axis of the three-jaw chuck. When grinding is performed on a milling machine or a grinder, the fixture seat 1 is clamped by a workbench.

[0032] See also Figure 3 , Figure 4 and Figure 5 As shown, the clamp seat 1 has a conical centering rod 101, the diameter of which gradually decreases upward, and a threaded hole 102 for assembling the locking rod structure 3 is arranged at the axis of the centering rod 101, and the threaded hole 102 penetrates the centering rod 101 downward, and a clamping rod 103 is cooperated with the threaded hole 102 at the bottom of the centering rod 101, and the chuck 2 is coaxial with the centering rod 101; a plurality of clamping openings 104 are arranged in a ring shape on the outer side of the clamp seat 1.

[0033] When used in conjunction with a lathe, the clamping rod 103 needs to be assembled. When used in conjunction with a milling machine or a grinder, the clamping rod 103 is removed and directly installed through the fixture seat 1.

[0034] The use of the tapered centering rod 101 can meet the centering requirements of gears with different inner diameters.

[0035] See also Figures 1 to 8 As shown, the movable chuck 2 includes a chuck 201, which is coaxial with the centering rod 101, and a plurality of positioning rods 202 for positioning the processed gear are arranged in a ring at the bottom of the chuck 201, and a bracket body 203 is arranged on the top of the chuck 201, and a through hole 204 for passing through the locking rod structure 3 is arranged at the middle position of the bracket body 203. The locking rod structure 3 passes through the through hole 204 and is screwed into the threaded hole 102. The chuck 201 has an axial hole 205, and the aperture of the axial hole 205 is larger than the large end diameter of the centering rod 101.

[0036] In the above technical solution, the gear 4 to be processed is clamped by the chuck 201, and the positioning rod 202 is inserted into the process hole 41 of the gear 4 to lock the gear 4 to prevent the gear 4 from rotating during the processing.

[0037] The chuck 201 is locked by the locking rod structure 3 to prevent deflection.

[0038] See also Figure 6 and Figure 7 As shown, a threaded portion 222 is disposed at the upper end of the positioning rod 202 , and a first threaded hole 223 for assembling the threaded portion 222 is disposed at the bottom of the chuck 201 .

[0039] In the above technical solution, the positioning rod 202 is replaceable and can be replaced after being worn.

[0040] The positioning rod 202 is a tapered rod, and the diameter of the positioning rod 202 gradually decreases downward.

[0041] See also Figure 4 As shown, the locking rod structure 3 includes a locking rod body 31, and a polygonal force-bearing end 32 is provided at the upper end of the locking rod body 31. The surface of the locking rod body 31 is processed with an external threaded portion 33 that matches the threaded hole. The locking rod body 31 passes through the through hole, and the part of the locking rod body 31 that passes through the through hole 204 is a smooth rod portion 34, and the smooth rod portion 34 is transitionally matched with the through hole 204.

[0042] See also Figure 3 As shown, the surface of the clamping rod 103 is processed to form a knurled portion 133 for anti-slip.

[0043] The above technical solution is to increase the stability of the clamping rod 103 and the machine tool chuck during assembly and reduce the anti-slip.

[0044] The clamping opening is U-shaped.

[0045] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. An automatic centering gear grinding fixture, characterized in that: The utility model comprises a clamp seat, a movable clamping plate matched with the clamp seat, and a locking rod structure used for connecting the clamp seat and the movable clamping plate.

2. The automatic centering gear grinding fixture according to claim 1 is characterized in that: The clamp seat has a conical centering rod, the diameter of which gradually decreases upwards, and a threaded hole for assembling the locking rod structure is arranged at the axis of the centering rod. The threaded hole penetrates the centering rod downward, and a clamping rod is fitted through the threaded hole at the bottom of the centering rod. The chuck is coaxial with the centering rod; a plurality of clamping openings are arranged in a ring shape on the outer side of the clamp seat.

3. The automatic centering gear grinding fixture according to claim 2 is characterized in that: The movable chuck includes a chuck, which is coaxial with the centering rod. A plurality of positioning rods for positioning the processed gears are arranged in a ring at the bottom of the chuck. A bracket body is arranged on the top of the chuck. A through hole for passing the locking rod structure is arranged at the middle position of the bracket body. The locking rod structure passes through the through hole and is screwed into the threaded hole. The chuck has an axial hole, and the diameter of the axial hole is larger than the large end diameter of the centering rod.

4. The automatic centering gear grinding fixture according to claim 3 is characterized in that: The upper end of the positioning rod is provided with a threaded portion, and the bottom of the chuck is provided with a first threaded hole for assembling the threaded portion.

5. The automatic centering gear grinding fixture according to claim 4 is characterized in that: The positioning rod is a tapered rod, and the diameter of the positioning rod gradually decreases downward.

6. The automatic centering gear grinding fixture according to claim 3 is characterized in that: The locking rod structure includes a locking rod body, the upper end of which is provided with a polygonal force-bearing end portion, the surface of the locking rod body is processed with an external threaded portion that matches the threaded hole, the locking rod body passes through the through hole, and the portion of the locking rod body that passes through the through hole is a smooth rod portion, and the smooth rod portion is transitionally matched with the through hole.

7. The automatic centering gear grinding fixture according to claim 2, characterized in that: The surface of the clamping rod is processed to form a knurled portion for anti-slip.

8. The automatic centering gear grinding fixture according to claim 2, characterized in that: The clamping opening is U-shaped.

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