Rotary positioning tool for gear machining

Abstract

The utility model provides a rotary positioning tool for gear machining, and belongs to the technical field of machinery. The problem that an existing tool is poor in practicability is solved. The gear machining rotary positioning tool comprises a cylindrical base and a positioning rod vertically fixed in the base, the upper end of the positioning rod extends out of the base, the upper end of the positioning rod is sleeved with a pressing ring and connected with a nut in a threaded mode, the nut is pressed on the top face of the pressing ring, and a clamping opening used for horizontally clamping a gear is formed between the top face of the base and the pressing ring. A key block is detachably fixed outside the upper end of the positioning rod and located in the clamping opening, a circle of positioning holes are vertically formed in the top face of the base, and the circle of positioning holes are evenly distributed in the circumferential direction of the base at intervals; linkage rods and springs enabling the upper ends of the linkage rods to tend to extend out of the corresponding positioning holes are vertically arranged in the positioning holes, and the lower ends of the linkage rods are always in sliding connection with the inner walls of the positioning holes. The rotary positioning tool for gear machining is practical.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery, and relates to a rotary positioning tooling, in particular to a rotary positioning tooling for gear processing. Background Technique

[0002] The rotary positioning tooling for gear processing is a tool or device specifically used in the gear processing process to ensure the accurate position and stability of the gear during rotation and positioning.

[0003] The existing positioning tooling, such as a indexable floating centering taper hole gear drill fixture (application number: 201720143077.3) disclosed in the Chinese patent database, installs a mandrel at the center of the rotating disk. The rotating disk is installed in the inner hole of the fixture body. The lower end face of the mandrel is floatingly clamped through a washer and a round nut; a rubber ring is installed on the mandrel, a taper sleeve is installed above the rubber ring, a drill bushing is installed on the drill template, a pressure foot is installed below the drill template, a locator is installed on the lower side of one end of the drill template, the drill template is sleeved on the mandrel, and the drill template is fixed by pressing with a hexagon nut. A pad iron is installed on the rotating disk, the workpiece is sleeved outside the taper sleeve on the mandrel, and the workpiece is fixedly installed through the pressure foot and the pad iron.

[0004] In the above fixture, the inner hole of the workpiece and the taper sleeve are in conical surface fit, resulting in that the fixture can only be used for workpieces with a tapered inner hole, with a narrow application range and poor practicability. Content of the Utility Model

[0005] The purpose of the utility model is to provide a rotary positioning tooling for gear processing with good practicability in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be realized by the following technical solutions: A rotary positioning tooling for gear processing includes a cylindrical base and a positioning rod vertically fixed in the base. The upper end of the positioning rod extends out of the base. A pressure ring is sleeved on the upper end of the positioning rod and a nut is screwed thereon. The nut presses on the top surface of the pressure ring, and a clamping opening for horizontally clamping the gear is formed between the top surface of the base and the pressure ring. A key block is detachably fixed outside the upper end of the positioning rod, and the key block is located in the clamping opening. It is characterized in that a circle of positioning holes is vertically opened on the top surface of the base, and the circle of positioning holes is evenly spaced along the circumferential direction of the base; a linkage rod is vertically arranged in the positioning hole and a spring is arranged to make the upper end of the linkage rod have a tendency to extend out of the corresponding positioning hole. The lower end of the linkage rod and the inner wall of the positioning hole always maintain a sliding connection.

[0007] During use, for a gear with a keyway on the inner wall, the key block and the keyway cooperate to form a stable circumferential fit between the positioning rod and the gear, so that the gear accurately follows the rotation of the base. At this time, the linkage rod moves downward against the spring force under the extrusion of the gear and completely retracts into the corresponding positioning hole.

[0008] For a gear having a circle of vertically arranged bolt holes, when the gear is clamped between the base and the pressure plate, at least part of the linkage rod is inserted into the corresponding bolt hole to form a stable circumferential fit between the positioning rod and the gear, so that the gear can accurately follow the base to operate.

[0009] By disassembling and assembling the key block and replacing the linkage rod type, the tooling can be adapted to different types of gears, which is not only easy to operate but also practical.

[0010] In the above-mentioned gear processing rotation positioning tool, the outer wall of the lower end of the above-mentioned linkage rod and the inner wall of the positioning hole are in contact with each other through the circumferential surface, which not only ensures a stable sliding fit between the linkage rod and the positioning hole, but also has the advantage of a simple structure.

[0011] In the above gear processing rotary positioning tool, the linkage rod includes a vertically arranged rod body and a sliding sleeve sleeved outside the lower end of the rod body, the upper end of the rod body can extend out of the corresponding positioning hole under the action of a spring, the outer wall of the sliding sleeve slides with the inner wall of the positioning hole, and the sliding sleeve is detachably connected to the rod body. The linkage rod is split into a detachably connected sliding sleeve and a rod body, so that the sliding sleeve and the rod body can be replaced separately, effectively reducing costs.

[0012] In the above-mentioned gear processing rotation positioning tool, the sleeve and the rod body are threadedly connected to facilitate the disassembly and assembly of the two.

[0013] As another solution, in the above gear processing rotation positioning tool, the inner wall of the sleeve and the outer wall of the rod body are close to each other, a threaded hole is radially penetrated on the side wall of the sleeve, a screw is screwed in the threaded hole, and the end of the screw is pressed tightly on the rod body. With the above design, the sleeve and the rod body can also be detachably connected.

[0014] In the above gear processing rotation positioning tool, a horizontally arranged and annular limiting surface is formed on the outer wall of the rod body, the outer diameter of the limiting surface is larger than the inner diameter of the sleeve, and the sleeve is pressed on the corresponding limiting surface. The limiting surface is provided so that the sleeve can be installed in place at one time, which further facilitates disassembly and assembly.

[0015] In the above-mentioned gear processing rotation positioning tool, the upper end of the spring is sleeved on the corresponding rod body, and the two ends of the spring act on the corresponding sliding sleeve bottom wall and the corresponding positioning hole bottom wall respectively, so that the spring can operate stably.

[0016] In the above gear processing rotation positioning tool, a conical guide surface is formed on the outer wall of the upper end of the rod body, and the guide surface extends to the top surface of the rod body. The guide surface is used to guide the rod body to be inserted into the gear bolt hole, which facilitates the positioning of the gear.

[0017] In the above-mentioned gear processing rotary positioning tooling, an annular shoulder is formed on the outer wall of the lower end of the positioning rod, and an annular step matching the annular shoulder is provided on the inner wall of the lower end of the base. The annular shoulder is inserted into the annular step and pressed against the bottom wall of the annular step. With the above design, it is convenient to connect the positioning rod and the base.

[0018] In the above-mentioned gear processing rotary positioning tooling, a lower round hole vertically penetrates through the annular shoulder, and an upper round hole is vertically opened on the bottom wall of the annular step. And the same cylindrical pin is embedded in the upper round hole and the lower round hole. With the cooperation of the upper round hole, the lower round hole and the cylindrical pin, the coaxiality of the positioning rod and the base can be effectively strengthened, and the rotation accuracy can be improved.

[0019] Compared with the prior art, the gear processing rotary positioning tooling of the present invention has the following advantages:

[0020] 1. By disassembling and assembling the key block and replacing the type of linkage rod, the tooling can be adapted to different types of gears, which is not only convenient to operate but also has good practicability.

[0021] 2. The linkage rod is split into a detachable and fixedly connected sliding sleeve and a rod body, so that both the sliding sleeve and the rod body can be replaced separately, effectively reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional schematic diagram of the gear processing rotary positioning tooling of the present invention.

[0023] Figure 2 is a sectional schematic diagram of the gear processing rotary positioning tooling of the present invention.

[0024] Figure 3 is Figure 2 an enlarged schematic diagram at A in

[0025] In the figure, 1. base; 1a. positioning hole; 1b. annular step; 2. positioning rod; 2a. annular shoulder; 3. pressing ring; 4. nut; 5. gear; 6. key block; 7. linkage rod; 7a. rod body; 7a1. limiting surface; 7a2. guiding surface; 7b. sliding sleeve; 8. spring; 9. cylindrical pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments. Embodiment 1

[0027] As Figure 1 shown, the gear processing rotary positioning tooling of the present invention includes a cylindrical base 1 and a positioning rod 2 vertically fixed in the base 1, and the positioning rod 2 and the base 1 are coaxially arranged.

[0028] Specifically,

[0029] like Figure 2 and Figure 3 As shown, the upper end of the positioning rod 2 extends out of the base 1, and the upper end of the positioning rod 2 is sleeved with a pressing ring 3 and a nut 4 is screwed, wherein the nut 4 is pressed on the top surface of the pressing ring 3; a clamping opening for horizontally clamping the gear 5 is formed between the top surface of the base 1 and the pressing ring 3. Figure 1 As shown, a key block 6 can be detachably fixed on the upper end of the positioning rod 2, and the key block 6 is in the clamping mouth. A circle of positioning holes 1a is vertically opened on the top surface of the base 1, and the circle of positioning holes 1a is evenly spaced along the circumference of the base 1. A linkage rod 7 and a spring 8 that makes the upper end of the linkage rod 7 have a tendency to extend out of the corresponding positioning hole 1a are vertically arranged in the positioning hole 1a. Among them, the lower end of the linkage rod 7 and the inner wall of the positioning hole 1a are always kept in sliding connection, and the linkage rod 7 can be completely retracted into the positioning hole 1a under force.

[0030] When in use, for the gear 5 with a keyway on the inner wall, the key block 6 cooperates with the keyway to form a stable circumferential fit between the positioning rod 2 and the gear 5, so that the gear 5 can accurately follow the operation of the base 1, and at this time, the linkage rod 7 moves downward under the extrusion of the gear 5 to overcome the elastic force of the spring 8 and completely retract into the corresponding positioning hole 1a.

[0031] For the gear 5 having a circle of vertically arranged bolt holes, when the gear 5 is clamped between the base 1 and the pressure plate, at least part of the linkage rod 7 is inserted into the corresponding bolt hole to form a stable circumferential fit between the positioning rod 2 and the gear 5, so that the gear 5 can accurately follow the base 1 in operation.

[0032] By disassembling and assembling the key block 6 and replacing the type of the linkage rod 7, the tooling can be adapted to different types of gears 5, which is not only convenient to operate but also has good practicality.

[0033] In this embodiment,

[0034] The outer wall of the lower end of the linkage rod 7 and the inner wall of the corresponding positioning hole 1a are in contact with each other through the circumferential surface, which not only ensures a stable sliding fit between the linkage rod 7 and the positioning hole 1a, but also has the advantage of a simple structure.

[0035] The key block 6 is installed as follows: the length of the key block 6 extends up and down; a slot matching the key block 6 is opened on the outer wall of the upper end of the positioning rod 2, one side of the key block 6 is inserted into the slot, and the key block 6 is fixedly connected to the positioning rod 2 by horizontally arranged screws.

[0036] The positioning rod 2 and the base 1 are welded and fixedly connected. Specifically, an annular shoulder 2a is integrally formed on the outer wall of the lower end of the positioning rod 2, and the annular shoulder 2a and the positioning rod 2 are coaxially arranged. An annular step 1b matching the annular shoulder 2a is provided on the inner wall of the lower end of the base 1. The annular shoulder 2a is inserted into the annular step 1b and pressed against the bottom wall of the annular step 1b, and the annular shoulder 2a is welded and fixedly connected to the base 1. Further explanation, a lower round hole is vertically penetrated through the annular shoulder 2a, an upper round hole is vertically opened on the bottom wall of the annular step 1b, and the same cylindrical pin 9 is embedded in the upper round hole, the lower round hole and the cylindrical pin 9. With the cooperation of the upper round hole, the lower round hole and the cylindrical pin 9, the coaxiality of the positioning rod 2 and the base 1 can be effectively enhanced, and the rotation accuracy can be improved.

[0037] As Figure 3 shown, the linkage rod 7 includes a rod body 7a arranged vertically and a sliding sleeve 7b sleeved outside the lower end of the rod body 7a. Among them, the upper end of the rod body 7a can extend out of the corresponding positioning hole 1a under the action of the spring 8; the outer wall of the sliding sleeve 7b is in sliding fit with the inner wall of the positioning hole 1a; the sliding sleeve 7b is detachably and fixedly connected to the rod body 7a. The linkage rod 7 is split into a detachably and fixedly connected sliding sleeve 7b and a rod body 7a, so that both the sliding sleeve 7b and the rod body 7a can be replaced separately, effectively reducing costs.

[0038] Among them,

[0039] The sliding sleeve 7b and the rod body 7a are threadedly connected, which is convenient for the disassembly and assembly of the two. Further explanation, a horizontally arranged and annular limiting surface 7a1 is formed on the outer side wall of the rod body 7a. The limiting surface 7a1 and the rod body 7a are coaxially arranged. The outer diameter of the limiting surface 7a1 is larger than the inner diameter of the sliding sleeve 7b, and the sliding sleeve 7b is pressed against the corresponding limiting surface 7a1. The provision of the limiting surface 7a1 enables the sliding sleeve 7b to be installed in place at one time, further facilitating disassembly and assembly.

[0040] The upper end of the spring 8 is sleeved on the corresponding rod body 7a, and both ends of the spring 8 act on the bottom wall of the corresponding sliding sleeve 7b and the bottom wall of the corresponding positioning hole 1a respectively, so that the spring 8 can operate stably.

[0041] A conical guiding surface 7a2 is formed on the outer wall of the upper end of the rod body 7a. The diameter of the guiding surface 7a2 gradually becomes larger from top to bottom, and the guiding surface 7a2 extends to the top surface of the rod body 7a. The guiding surface 7a2 is used for guiding the rod body 7a to be inserted into the bolt hole of the gear 5, facilitating the positioning of the gear 5. Embodiment Two

[0042] The structure and principle of this Embodiment Two are basically the same as those of Embodiment One. The difference is that the inner side wall of the sliding sleeve 7b and the outer side wall of the rod body 7a are in contact with each other. A threaded hole is radially penetrated through the side wall of the sliding sleeve 7b, a screw is screwed in the threaded hole, and the end of the screw presses tightly on the rod body 7a. With the above design, the detachable and fixed connection between the sliding sleeve 7b and the rod body 7a can also be achieved.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A rotary positioning tooling for gear machining, comprising a cylindrical base (1) and a positioning rod (2) vertically fixed in the base (1). The upper end of the positioning rod (2) extends out of the base (1). A pressing ring (3) is sleeved on the upper end of the positioning rod (2), and a nut (4) is screwed thereon. The nut (4) presses on the top surface of the pressing ring (3). A clamping opening for horizontally clamping a gear (5) is formed between the top surface of the base (1) and the pressing ring (3). A key block (6) is detachably fixed outside the upper end of the positioning rod (2), and the key block (6) is located in the clamping opening. It is characterized in that, On the top surface of the base (1), a circle of positioning holes (1a) are vertically formed, and the circle of positioning holes (1a) are evenly distributed at intervals along the circumferential direction of the base (1); a linkage rod (7) is vertically arranged in the positioning hole (1a), and a spring (8) that makes the upper end of the linkage rod (7) tend to extend out of the corresponding positioning hole (1a) is provided. A sliding connection is always maintained between the lower end of the linkage rod (7) and the inner wall of the positioning hole (1a).

2. The gear processing rotary positioning tooling according to claim 1, wherein The outer wall of the lower end of the above-mentioned linkage rod (7) and the inner wall of the positioning hole (1a) are in contact and cooperate through the circumferential surface.

3. The gear machining rotary positioning tooling according to claim 1 or 2, characterized in that, The linkage rod (7) includes a vertically arranged rod body (7a) and a sliding sleeve (7b) sleeved outside the lower end of the rod body (7a). The upper end of the rod body (7a) can extend out of the corresponding positioning hole (1a) under the action of the spring (8). The outer wall of the sliding sleeve (7b) is in sliding fit with the inner wall of the positioning hole (1a), and the sliding sleeve (7b) is detachably fixedly connected to the rod body (7a).

4. The gear processing rotary positioning tooling according to claim 3, characterized in that, The sliding sleeve (7b) and the rod body (7a) are threadedly connected.

5. The gear processing rotary positioning tooling according to claim 3, characterized in that, The inner side wall of the sliding sleeve (7b) and the outer side wall of the rod body (7a) are in contact. A threaded hole is radially penetrated through the side wall of the sliding sleeve (7b), and a screw is screwed in the threaded hole, and the end of the screw presses against the rod body (7a).

6. The gear processing rotary positioning tooling according to claim 4, characterized in that A horizontally arranged and annular limiting surface (7a1) is formed on the outer side wall of the rod body (7a). The outer diameter of the limiting surface (7a1) is larger than the inner diameter of the sliding sleeve (7b), and the sliding sleeve (7b) presses on the corresponding limiting surface (7a1).

7. The gear processing rotary positioning tooling according to claim 3, wherein, The upper end of the spring (8) is sleeved on the corresponding rod body (7a), and the two ends of the spring (8) act on the bottom wall of the corresponding sliding sleeve (7b) and the bottom wall of the corresponding positioning hole (1a) respectively.

8. The gear processing rotary positioning tooling according to claim 3, wherein, A conical guiding surface (7a2) is formed on the outer wall of the upper end of the rod body (7a), and the guiding surface (7a2) extends to the top surface of the rod body (7a).

9. The gear processing rotary positioning tooling according to claim 1, wherein An annular shoulder (2a) is formed on the outer wall of the lower end of the positioning rod (2). An annular step (1b) matching the annular shoulder (2a) is formed on the inner wall of the lower end of the base (1). The annular shoulder (2a) is inserted into the annular step (1b) and presses on the bottom wall of the annular step (1b).

10. The gear processing rotary positioning tooling according to claim 9, characterized in that, A lower round hole is vertically penetrated through the annular shoulder (2a), and an upper round hole is vertically formed on the bottom wall of the annular step (1b). The same cylindrical pin (9) is embedded in the upper round hole and the lower round hole.

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