Direction selecting jig for finishing internal teeth

Abstract

The utility model relates to the technical field of direction selection jigs, in particular to a direction selection jig for finishing internal teeth, which comprises a base, and a support frame is fixedly connected to the top of the base. According to the device, the output end of the stepping motor can drive the driving shaft and the cross-shaped shaft at the bottom to rotate, when a certain tooth groove of an inner tooth hole in a round workpiece is driven to be aligned with the tooth-shaped direction-selecting insert, the first lifting air cylinder is started to drive the jacking column to ascend, and the tooth-shaped direction-selecting insert is synchronously driven to slide upwards in the limiting sliding groove; then the tooth-shaped direction-selecting insert can be inserted into an inner tooth hole, and tooth groove strips on the two sides of the tooth-shaped direction-selecting insert can be embedded into an inner tooth groove of the circular workpiece in a sliding mode, so that automatic feeding of the inner tooth workpiece is conveniently achieved, manpower consumption is reduced, and the production efficiency of powder metallurgy inner tooth parts is improved; according to the direction-selecting jig, the incomplete circumferential positioning core rod is used for achieving center positioning of the circular workpiece, meanwhile, space is reserved, the tooth-shaped direction-selecting insert stretches out and draws back to make contact with the feature of the to-be-selected object, and therefore circumferential positioning of the workpiece is automatically achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of direction selection fixture, specifically is the direction selection fixture for internal tooth finishing. BACKGROUND

[0002] Powder metallurgy parts need to be finished after sintering to meet the precision requirement, most of the center of the rotary workpiece has an inner hole, if the workpiece needs to be circumferentially positioned during finishing, the center positioning core rod is usually sleeved into the center inner hole, the workpiece rotates around the core rod, and then the insert is clamped into the feature (such as the notch on the outer circle, the external tooth, etc.) needing circumferential positioning, the workpiece stops rotating to realize circumferential positioning; for the powder metallurgy part needing finishing machining of internal tooth, the internal tooth is exactly the feature to be circumferentially positioned, the internal tooth of the workpiece needs to correspond to the external tooth of the finishing die (the die external tooth is inserted into the internal tooth of the workpiece to correct the deformation of the workpiece due to sintering), if the direction selection insert is arranged in the inner hole, the center positioning core rod cannot be placed at the inner hole position, and the contradiction leads to the fact that the direction selection mechanism in the traditional automatic feeding mechanism cannot realize circumferential positioning of the internal tooth part, so manual feeding is often used for such parts, thereby reducing the production efficiency of powder metallurgy. SUMMARY

[0003] The utility model discloses a direction selection fixture for internal tooth finishing, which solves the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] The direction selection fixture for internal tooth finishing includes a base seat, the top of the base seat is fixedly connected with a support frame, the side wall of the support frame is fixedly connected with a positioning hoop, a circular shaft seat is fixedly sleeved in the positioning hoop, a positioning core rod is fixedly sleeved at the center position of the circular shaft seat, a limiting shaft column is fixedly connected to the top of the positioning core rod, a tooth-shaped direction selection insert is slidingly inserted into the limiting shaft column, and a circular workpiece is slidingly sleeved on the outside of the limiting shaft column.

[0006] Further, the base seat is provided with:

[0007] A lifting cylinder one is fixedly connected to the bottom end of the base seat;

[0008] A connecting block is fixedly connected to the top end of the lifting cylinder one;

[0009] A jacking column is fixedly connected to the top of the connecting block;

[0010] A rotating shaft is rotatably connected to the top end of the jacking column, and the rotating shaft is fixedly connected to the bottom end of the tooth-shaped direction selection insert.

[0011] Further in, the relative outer wall of the tooth shape selection direction insert block is fixedly connected with a tooth groove strip, the circular workpiece is provided with an inner tooth hole, and the tooth shape selection direction insert block and the tooth groove strip are slidably connected with the inner tooth hole.

[0012] Further in, the circular shaft seat is symmetrically provided with two limiting sliding grooves which are slidably connected with the tooth shape selection direction insert block.

[0013] Further in, the top of the support frame is fixedly connected with two lifting cylinders II, the top ends of the two lifting cylinders II are fixedly connected with a bending plate, one end of the bending plate is rotatably connected with a sleeve seat, and the bottom of the sleeve seat is fixedly connected with a rotary pressing head.

[0014] Further in, the sleeve seat is slidably sleeved with a cross-shaped shaft, the top end of the cross-shaped shaft is fixedly connected with a driving shaft, the center of the driving shaft is fixedly connected with the output end of a stepping motor, and the bottom of the stepping motor is fixedly connected with a positioning frame.

[0015] Further in, the center of the rotary pressing head is fixedly connected with a rubber ring, and the rotary pressing head is provided with a pressing groove.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1, through the carrying clamp jaw of previous position, the circular workpiece is placed on the limiting shaft column, the inner tooth hole in the center of the circular workpiece is sleeved with the positioning core rod, the rubber ring in the rotary pressing head can be pressed on the circular workpiece, the output end of the stepping motor can drive the rotation of the driving shaft and the cross-shaped shaft at the bottom, the sleeve seat and the cross-shaped shaft are slidably sleeved, so that the cross-shaped shaft can drive the rotary pressing head to rotate, when the tooth groove of the inner tooth hole in the circular workpiece is aligned with the tooth shape selection direction insert block, the lifting cylinder I is started to drive the top support column to rise, and the tooth shape selection direction insert block is slid upward in the limiting sliding groove, then the tooth shape selection direction insert block can be inserted into the inner tooth hole, and the tooth groove strips on both sides can be slidably embedded in the inner tooth groove of the circular workpiece, so that the circumferential positioning of the powder metallurgy part can be realized quickly, the automatic feeding of the inner tooth workpiece is facilitated, the labor consumption is reduced, and the production efficiency of the powder metallurgy inner tooth part is improved, the positioning core rod of the selection direction tool is not a complete circle, the center of the circular workpiece is positioned, and space is reserved for the tooth shape selection direction insert block to expand and contract, so that the circumferential positioning of the workpiece is automatically realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the utility model;

[0019] Figure 2 It is the connecting structure schematic diagram of the circular shaft seat in the utility model;

[0020] Figure 3 is the schematic diagram of the positioning hoop structure in the utility model;

[0021] Figure 4 is the schematic diagram of the positioning hoop structure in the utility model;

[0022] Figure 5 is the schematic diagram of the positioning hoop structure in the utility model;

[0023] Figure 6 is the schematic diagram of the positioning hoop structure in the utility model.

[0024] In the drawing: 101, base seat; 102, support frame; 103, positioning hoop; 104, round shaft seat; 105, positioning core rod; 106, limiting shaft column; 107, limiting sliding groove; 108, tooth-shaped direction selection insert block; 109, toothed groove strip; 110, rotating shaft; 111, top supporting column; 112, connecting block; 113, lifting cylinder one; 201, positioning frame; 202, stepping motor; 203, driving shaft; 204, cross-shaped shaft; 205, sleeving seat; 206, bent plate; 207, lifting cylinder two; 208, rotary pressing head; 209, rubber ring; 210, pressing groove; 301, round workpiece; 302, inner toothed hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Please refer to Figures 1-6The utility model discloses an inside tooth finishing selects direction tool, including base seat 101, the top fixed connection of base seat 101 has support frame 102, be provided with on base seat 101: the bottom fixed connection of lifting cylinder no. 1 113 with base seat 101, the fixed connection of connecting block 112 is in the top of lifting cylinder no. 1 113, the fixed connection of top bracing column 111 is in the top of connecting block 112, the rotation connection of pivot 110 is in the top of top bracing column 111, and pivot 110 is fixedly connected with the bottom of tooth profile selects direction insert block 108. The lateral wall of support frame 102 is fixedly connected with the locating hoop 103, and the locating hoop 103 is fixedly sleeved with the circular shaft seat 104, the locating core rod 105 is fixedly sleeved with the center position of circular shaft seat 104, the inside tooth hole 302 of the center position of circular workpiece 301 is sleeved with the locating core rod 105, so that circular workpiece 301 can rotate on it, the fixed connection of the top of locating core rod 105 has the limiting shaft column 106, the sliding insertion of tooth profile selects direction insert block 108 is inserted in the limiting sliding slot 107, then tooth profile selects direction insert block 108 can be inserted into the inside tooth hole 302, and the tooth groove strip 109 of its both sides can be slidably embedded in the inside tooth groove of circular workpiece 301, so that the circumferential positioning of powder metallurgy parts can be quickly realized, and the external sliding sleeve of limiting shaft column 106 has circular workpiece 301. The relative outer wall of tooth profile selects direction insert block 108 is fixedly connected with tooth groove strip 109, so that the compression groove 210 can be slidably inserted with circular workpiece 301, so as to increase the friction force of circular workpiece 301, thereby preventing skidding when driving circular workpiece 301 to rotate, the inside tooth hole 302 is set in circular workpiece 301, and tooth profile selects direction insert block 108 and tooth groove strip 109 are slidably connected with the inside tooth hole 302. Two limiting sliding slots 107 that are slidably connected with tooth profile selects direction insert block 108 are symmetrically formed in circular shaft seat 104.

[0027] The top of support frame 102 is fixedly connected with two lifting cylinders no. 207, the top end of the two lifting cylinders no. 207 is fixedly connected with a bent plate 206, one end of the bent plate 206 is rotationally connected with a sleeve seat 205, the bottom of the sleeve seat 205 is fixedly connected with a rotary pressing head 208, the sleeve seat 205 is slidably sleeved with a cross-shaped shaft 204, the top end of the cross-shaped shaft 204 is fixedly connected with a driving shaft 203, the center position of the driving shaft 203 is fixedly connected with the output end of a stepping motor 202, the output end of the stepping motor 202 can drive the driving shaft 203 and the cross-shaped shaft 204 to rotate, the sleeve seat 205 is slidably sleeved with the cross-shaped shaft 204, so that the cross-shaped shaft 204 can drive the rotary pressing head 208 to rotate, the bottom of the stepping motor 202 is fixedly connected with a positioning frame 201, the center position of the rotary pressing head 208 is fixedly connected with a rubber ring 209, and the rotary pressing head 208 is provided with a compression groove 210.

[0028] Specifically, the circular workpiece 301 is placed on the limiting shaft column 106 by the carrying clamping jaw of the previous work station, the inner tooth hole 302 at the center position of the circular workpiece 301 is sleeved with the positioning mandrel 105, so that the circular workpiece 301 can rotate thereon, then the bending plate 206 at the top of the two lifting cylinders two 207 can be driven to descend, thereby driving the sleeving seat 205 and the bottom rotary pressing head 208 to descend, the rubber ring 209 in the rotary pressing head 208 can be pressed on the circular workpiece 301, at the same time, the pressing groove 210 can be slidably inserted with the circular workpiece 301, so as to increase the friction with the circular workpiece 301, thereby preventing slipping when driving the circular workpiece 301 to rotate;

[0029] Then the driving shaft 203 and the cross-shaped shaft 204 at the bottom can be driven to rotate by the output end of the stepping motor 202, the sleeving seat 205 and the cross-shaped shaft 204 are slidably sleeved, so that the cross-shaped shaft 204 can drive the rotary pressing head 208 to rotate, when a certain tooth groove of the inner tooth hole 302 in the driving circular workpiece 301 is aligned with the tooth-shaped selection direction insert 108, the lifting cylinder one 113 is started again to drive the supporting column 111 to rise, synchronously driving the tooth-shaped selection direction insert 108 to slide upward in the limiting sliding groove 107, then the tooth-shaped selection direction insert 108 can be inserted into the inner tooth hole 302, and the tooth groove strip 109 at the two sides can be slidably embedded in the inner tooth groove of the circular workpiece 301, so that the circumferential positioning of the powder metallurgy part can be quickly realized, thereby facilitating the automatic feeding of the inner tooth workpiece, reducing the labor consumption, and improving the production efficiency of the powder metallurgy inner tooth part;

[0030] The selection direction jig uses the positioning mandrel 105 with an incomplete circumference to realize the center positioning of the circular workpiece 301, and at the same time, space is reserved for the tooth-shaped selection direction insert 108 to extend and retract to contact the to-be-selected feature, so that the circumferential positioning of the workpiece is automatically realized.

[0031] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0032] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A direction selecting jig for internal tooth finishing, characterized by, The utility model relates to a kind of circular workpiece positioning device, including base (101), base (101) top fixedly connected with support frame (102), support frame (102) side wall is fixedly connected with positioning hoop (103), positioning hoop (103) is fixedly sleeved with round axle seat (104), round axle seat (104) center position is fixedly sleeved with positioning core rod (105), positioning core rod (105) top is fixedly connected with limiting shaft column (106), limiting shaft column (106) is slidably inserted with tooth shape direction selection insert block (108), the outside of limiting shaft column (106) is slidably sleeved with circular workpiece (301).

2. The direction selecting jig for internal tooth finishing according to claim 1, wherein Base (101) is provided with: Lifting cylinder one (113), lifting cylinder one (113) bottom is fixedly connected with base (101); Connecting block (112), fixedly connected to the top of lifting cylinder one (113); Top support column (111), fixedly connected to the top of connecting block (112); Rotating shaft (110), rotationally connected to the top of top support column (111), rotating shaft (110) is fixedly connected with the bottom of tooth shape direction selection insert block (108).

3. The direction selecting jig for internal tooth finishing according to claim 1, wherein Tooth shape direction selection insert block (108) relative outer wall is fixedly connected with tooth groove strip (109), circular workpiece (301) is provided with inner tooth hole (302), tooth shape direction selection insert block (108) and tooth groove strip (109) are slidably connected with inner tooth hole (302).

4. The direction selecting jig for internal tooth finishing according to claim 1, wherein Two limiting sliding grooves (107) are symmetrically provided in round axle seat (104) and slidably connected with tooth shape direction selection insert block (108).

5. The direction selecting jig for internal tooth finishing according to claim 1, wherein Support frame (102) top is fixedly connected with two lifting cylinder two (207), two lifting cylinder two (207) top are fixedly connected with bending plate (206), bending plate (206) one end is rotatably connected with sleeve seat (205), the bottom of sleeve seat (205) is fixedly connected with rotary pressure head (208).

6. The direction selecting jig for internal tooth finishing according to claim 5, wherein Cross type shaft (204) is slidably sleeved in sleeve seat (205), cross type shaft (204) top is fixedly connected with driving shaft (203), driving shaft (203) center position is fixedly connected with the output end of step motor (202), step motor (202) bottom is fixedly connected with positioning frame (201).

7. The direction selecting jig for internal tooth finishing according to claim 5, wherein Rubber ring (209) is fixedly connected in rotary pressure head (208) center position, rotary pressure head (208) is provided with pressure groove (210).

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