Positioning tool for machining rocker arm shaft sector gear

Abstract

The utility model relates to a positioning tool for machining fan teeth of a rocker arm shaft. Comprising a base, a sliding block, a turning plate seat, a turning plate, a steel ball seat and a steel ball, a long key groove A is formed in the base, a key A is arranged at one end of the sliding block, the key A is matched with the long key groove A to enable the sliding block to slide on the base, the sliding block is additionally connected with the base through a bolt, a long key groove B is formed in the sliding block, a key B is arranged below the turning plate seat, and the long key groove B is matched with the key B to enable the turning plate seat to slide on the sliding block. The turning plate seat is further connected with the sliding block through a bolt and connected with one end of the turning plate through a pin shaft, a long key groove C is formed in the lower portion of the turning plate, the steel ball seat is in clearance fit with the long key groove C, the turning plate is further connected with the steel ball seat through a bolt, and the steel ball is fixedly welded to the lower portion of the steel ball seat. The tool is low in cost, and cost is saved. The notch groove of the rocker arm shaft is used for positioning, machining of the sector is achieved, the size is stable in the machining process, the size requirement is met, and the sector gear machining precision is higher.

Description

Technical Field

[0001] The utility model relates to the field of commercial vehicle steering gears, and particularly to a positioning tooling for machining the sector teeth of a rocker shaft. Background Art

[0002] The rocker shaft is a key component of a commercial vehicle steering gear. The existing hydraulic steering gears are developing towards high-end electro-hydraulic steering gears, and at the same time, the product requirements for the rocker shaft are also improving synchronously. The rocker shaft generally includes a threaded portion 100, a spline portion 200, a long-end optical shaft portion 300, a sector tooth portion 400, and a short-end optical shaft portion 500. A notch 600 and an inner hole 700 are machined at one end of the short-end optical shaft portion. The machining process is to first machine the sector tooth blank, position it with the sector tooth blank, machine the notch at the short end, then place the rocker shaft on a three-jaw chuck, and the operator positions it according to experience and finely inserts the sector teeth with a sector tooth shaping machine. This machining method results in low machining accuracy of the sector teeth. Now, the requirements for the symmetry of both ends of the sector teeth of the rocker shaft in electro-hydraulic steering gears are increasing, resulting in the inability of the existing machining methods to meet the needs of high-end products.

[0003] There are two solutions for the current situation: Solution 1: Change the existing process, first finely machine the sector teeth, and add a piece of equipment after the sector tooth machining process to mill the notch with the sector teeth positioned; Solution 2: Do not change the existing process, still mill the notch first, but add a tooling in the sector tooth machining process to machine the sector teeth with the notch positioned. Solution 1 requires a cost of about 100,000 yuan for new equipment and the number of processes increases, and both the quality and labor costs increase. While the manufacturing cost of the tooling in Solution 2 is only about 1,000 yuan. After comprehensive consideration, Solution 2 is selected, and a positioning tooling is added. Content of the Utility Model

[0004] The purpose of the utility model is to provide a positioning tooling for machining the sector teeth of a rocker shaft. The use of this tooling can make the sector teeth machined by the shaping machine have higher symmetry relative to the notch with the notch positioned.

[0005] The technical solution of the utility model:

[0006] A positioning tooling for machining the sector teeth of a rocker shaft includes a base, a slider, a flap seat, a flap, a steel ball seat, and a steel ball. A long keyway A is provided on the base. One end of the slider is provided with a key A, and the key A is matched with the long keyway A to enable the slider to slide on the base. The slider is also connected to the base by bolts. A long keyway B is provided on the slider, and a key B is provided under the flap seat. The long keyway B and the key B are matched to enable the flap seat to slide on the slider. The flap seat is also connected to the slider by bolts. The flap seat is connected to one end of the flap by a pin shaft. A long keyway C is opened under the flap. The steel ball seat is in clearance fit with the long keyway C. The flap is also connected to the steel ball seat by bolts. A steel ball is welded and fixed under the steel ball seat.

[0007] Advantages of the utility model:

[0008] 1. The positioning tooling of the present application has a low cost, saving actual cost and quality cost. Moreover, by positioning with the notch of the rocker shaft through the tooling of the present application, the machining of the tooth sector is realized. The operation process is convenient, the dimensions are stable during the machining process, meeting the dimensional requirements, and the symmetry of the fan teeth on both sides of the rocker shaft is good, and the machining accuracy of the fan teeth is higher. Description of the drawings

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative work.

[0010] Figure 1 It is a schematic diagram of the overall structure of the positioning tooling for machining the fan teeth of the rocker shaft in the present application.

[0011] Figure 2 It is a schematic diagram of the overall structure of the positioning tooling for machining the fan teeth of the rocker shaft in the present application.

[0012] Figure 3 It is a schematic diagram of the overall structure of the positioning tooling for machining the fan teeth of the rocker shaft in the present application.

[0013] Figure 4 It is a schematic diagram of the structure of the rocker shaft described in the present application.

[0014] Figure 5 It is a top view of the rocker shaft described in the present application.

[0015] Figure 6 It is a diagram of the working state of the tooling in the present application.

[0016] Reference numerals:

[0017] Base 1; Slide block 2; Flap seat 3; Flap 4; Ball seat 5; Ball 6; Long keyway A 7; Long keyway B 9; Key B 10; Pin shaft 11; Long keyway C 12; Long through hole 13; Arc surface 14; Chuck jaw groove 15.

[0018] Three-jaw chuck 20; Rocker shaft 30; Tooling 40; Gear shaper 50; Tailstock center 60;

[0019] Threaded part 100; Spline part 200; Long-end optical shaft part 300; Fan tooth part 400; Short-end optical shaft part 500; Notch 600; Inner hole 700. Detailed implementation manners

[0020] In order to solve the problems in the background art, the present application particularly invents a positioning tooling for processing the rocker shaft sector gear. The use of this tooling makes the processing accuracy of the sector gear higher.

[0021] It should be noted that in the description of the present application, the terms "inner", "outer", "upper", "lower", "left", "right" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0023] A positioning tooling for processing the rocker shaft sector gear includes a base 1, a slider 2, a flap seat 3, a flap 4, a ball seat 5 and a ball 6. A long keyway A7 is provided on the base. One end of the slider is provided with a key A (not shown in the figure), and the key A cooperates with the long keyway A to enable the slider to slide on the base. The slider is additionally connected to the base by bolts and fixed with bolts after sliding to the corresponding position. A long keyway B9 is provided on the slider 2, and a key B10 is provided under the flap seat. The long keyway B and the key B cooperate to enable the flap seat to slide on the slider. The flap seat is additionally connected to the slider by bolts and fixed with bolts after sliding to the corresponding position. The flap seat 3 is connected to one end of the flap by a pin shaft 11. A long keyway C12 is opened under the flap 4. The ball seat 5 has a clearance fit with the long keyway C12. The flap 4 is additionally connected to the ball seat by bolts and fixed with bolts after sliding to the corresponding position. A ball 6 is welded and fixed under the ball seat.

[0024] In the present application, the base and the slider are positioned in the form of a clearance fit between a key and a keyway, the slider and the flap seat are positioned in the form of a clearance fit between a key and a keyway, and the flap and the ball seat are positioned in the form of a clearance fit between a key and a keyway. The overall structure is stable and reliable. The present application is positioned by keys and fixed by bolts, the operation process is convenient, the dimensions are stable during the processing process, the dimensional requirements are met, and the actual cost and quality cost are saved for the enterprise. The present application is positioned by the notch of the rocker shaft to realize the processing of the tooth fan, saving the actual cost and quality cost.

[0025] On both sides of the long keyway A7 on the base 1, there is a long through-hole 13 respectively. Bolts pass through the two long through-holes on the base and are connected to the slider. On both sides of the long keyway B on the slider, there is a long through-hole 13 respectively. Bolts pass through the two long through-holes on the slider and are connected to the flap seat. At the position corresponding to the long keyway C on the upper surface of the flap, there is a long through-hole. Bolts pass through the long through-hole on the flap and are connected to the steel ball seat.

[0026] The side of the slider facing the outside is an inwardly concave arc surface 14, and the radian matches the outer diameter of the rocker arm shaft.

[0027] The base 1 is in an overall "L" shape. In the middle of the lower end of the base, there is a chuck jaw groove 15, and the chuck jaw groove 15 divides the lower end of the base into two symmetrical left and right parts. During use, insert the chuck jaw groove at the lower end of the base onto the chuck jaw for tooling positioning.

[0028] Usage process:

[0029] After the tooling of this application is assembled, use the three-jaw chuck 20 to pre-clamp the long-end threaded part 100 of the rocker arm shaft 30. Push the chuck jaw groove 15 of the base of the tooling of this application onto the chuck jaw. After the arc surface part of the slider of the tooling 40 of this application abuts against the short-end optical axis of the rocker arm shaft, flip the flap so that the steel ball falls into the notch of the rocker arm shaft to complete the positioning. Remove the tooling of this application, and the tailstock center 60 of the gear shaper 50 presses against the short-end inner hole 700 of the workpiece rocker arm shaft. The three-jaw chuck clamps the long-end threaded part of the workpiece rocker arm shaft to complete this positioning and clamping.

[0030] The tooling of this application has been actually verified by machining the rocker arm shaft 3411081-ZDL001 on-site. The dimensions and stability meet the requirements, saving actual costs and quality costs for the enterprise.

[0031] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and without departing from the content of the technical solution of the present invention, and design similar structural manners and implementations to this technical solution without creative efforts based on the technical essence of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A positioning tooling for machining the rocker shaft sector gear, characterized in that: It includes a base, a slider, a flap seat, a flap, a steel ball seat and a steel ball. A long keyway A is provided on the base. One end of the slider is provided with a key A, and the key A is matched with the long keyway A to enable the slider to slide on the base. The slider is additionally connected to the base by bolts. A long keyway B is provided on the slider, and a key B is provided under the flap seat. The long keyway B and the key B are matched to enable the flap seat to slide on the slider. The flap seat is additionally connected to the slider by bolts. The flap seat is connected to one end of the flap by a pin shaft. A long keyway C is opened under the flap. The steel ball seat and the long keyway C are in clearance fit. The flap is additionally connected to the steel ball seat by bolts. A steel ball is fixedly welded under the steel ball seat.

2. The positioning tooling for processing the rocker shaft sector gear according to claim 1, characterized in that: On both sides of the long keyway A on the base, there is a long through hole respectively. Bolts pass through the two long through holes on the base and are connected to the slider. On both sides of the long keyway B on the slider, there is a long through hole respectively. Bolts pass through the two long through holes on the slider and are connected to the flap seat. At the position corresponding to the long keyway C on the flap, there is a long through hole. Bolts pass through the long through hole on the flap and are connected to the steel ball seat.

3. A positioning tooling for processing rocker shaft sector gears according to claim 1, characterized in that: The side of the slider facing the outside is an inwardly concave arc surface.

4. A positioning tooling for processing the rocker shaft sector gear according to claim 1, characterized in that: The base is integrally in an "L" shape. A chuck jaw groove is provided in the middle of the lower end of the base, and the chuck jaw groove divides the lower end of the base into two symmetrical parts.

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