Machining tool for control arm

Abstract

The utility model discloses a machining tool for a control arm, which belongs to the technical field of machining tool structures and comprises a bottom plate, an inclined seat, an expansion sleeve, a spring, a pressing plate and a first fastening screw. The inclined seat comprises a circular shaft part and a big-end-down circular truncated cone part, the large-diameter end of the circular truncated cone part is fixedly connected with the upper end of the circular shaft part, and the circular shaft part and the circular truncated cone part are integrally machined; the upper end face of the bottom plate makes contact with the end, away from the circular truncated cone part, of the circular shaft part. The expansion sleeve is of a circular ring sleeve structure, and an inner hole of the expansion sleeve is a conical hole with a large end and a small end. Compared with the prior art, a workpiece is tensioned by utilizing internal and external taper movement, so that the coaxiality of the control arm can be conveniently measured by adopting detection tools such as a dial indicator in the machining process of the control arm, the coaxiality of the machined control arm is ensured to meet the requirement, the rejection rate is further reduced, and the production efficiency is improved. And the utility model has the advantages of small deformation, good stability, no trace in the inner hole and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of machining tooling structures, and more specifically, it especially belongs to a machining tooling for a control arm. Background Art

[0002] The control arm is a part in the chassis drive system of a commercial bus. In traditional machining of the control arm, due to few orders, small-batch machining is carried out using a horizontal machine tool. However, the horizontal machine tool is widely used in the machining and manufacturing of diversified products with its flexibility and adaptability. With the increase in the order quantity of the control arm, the horizontal machine tool can no longer meet the demand for mass production of the control arm. Therefore, the current solution is to add a set of vertical tooling, which is applied to the vertical machine tool for mass production of the control arm.

[0003] Since there is a coaxiality requirement for the bearing seats on the upper and lower parts of the control arm, it is necessary to complete the machining at one time to ensure the form and position tolerances. In the current vertical tooling used, it is difficult to measure the bearing seat at the lower part of the control arm during the machining process, resulting in the control arm after machining not meeting the coaxiality requirement, especially being particularly prominent after changing the tool, and the rejection rate remaining high. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the above traditional technologies, and provide a machining tooling for a control arm, achieving the purpose of facilitating the measurement of coaxiality during the machining process of the control arm.

[0005] The machining tooling for a control arm provided by the utility model includes a bottom plate, an inclined seat, an expansion sleeve, a spring, a pressing plate and a first fastening screw; the inclined seat includes a circular shaft part and a frustum part with a smaller upper part and a larger lower part. The large-diameter end of the frustum part is fixedly connected to the upper end of the circular shaft part, and the circular shaft part and the frustum part are integrally machined; the bottom plate is fixedly connected below the inclined seat, and the upper end surface of the bottom plate contacts the end of the circular shaft part away from the frustum part;

[0006] The expansion sleeve is of an annular sleeve structure, and the inner hole of the expansion sleeve is a tapered hole with one end large and one end small; one end of the expansion sleeve is processed with a stepped protrusion, and the stepped protrusion is located at the small-hole end of the inner hole of the expansion sleeve; the expansion sleeve is respectively provided with U-shaped grooves distributed in an annular array on the outer circle and the inner hole;

[0007] The expansion sleeve is sleeved on the inclined seat, and the large-hole end direction of the expansion sleeve is close to the bottom plate; the outer circumference of the inclined seat is provided with springs distributed in an annular array; the springs are located between the bottom plate and the expansion sleeve, and both ends of the springs are respectively connected and fixed to the bottom plate and the expansion sleeve;

[0008] A groove is opened at the end of the inclined seat away from the bottom plate; the pressing plate is of a stepped shaft structure, the diameter of the small-head end of the pressing plate is matched with the diameter of the groove, and the diameter of the large-head end of the pressing plate is larger than the diameter of the stepped protrusion; a circular groove is opened on the side of the large-head end of the pressing plate close to the small-head end, and the inner diameter of the circular groove is matched with the diameter of the stepped protrusion;

[0009] In the assembled state, the small head end of the pressing plate is located in the groove, and the stepped protrusion is located in the card slot. The pressing plate and the inclined seat are fixedly connected by a first fastening screw.

[0010] Furthermore, the bottom plate and the inclined seat are fixedly connected by a second fastening screw.

[0011] A machining tool for a control arm provided by the utility model mainly comprises a bottom plate, an inclined seat, an expansion sleeve, a spring, a pressing plate and a first fastening screw; by using the pressing plate to press the small end of the expansion sleeve; when machining the bearing platform at the lower part of the control arm, the bearing platform at the lower part of the control arm is sleeved on the expansion sleeve, and the expansion sleeve is pressed down by the weight of the control arm and moves downward along the contour track of the inclined seat. When the small end of the expansion sleeve leaves the card slot of the pressing plate and is externally supported by the large diameter end of the frustum part, the small end of the expansion sleeve is expanded and enlarged, and the bearing platform hole under the control arm is tightened, so as to realize the clamping and fixing of the control arm on the tooling; after the bearing platform under the control arm is machined, first loosen the first fastening screw that fastens the pressing plate and the inclined seat. The expansion sleeve moves upward under the action of the spring. During the upward movement of the expansion sleeve, the contour of the inclined seat cooperating with the expansion sleeve gradually becomes smaller, and the expansion sleeve loses the expansion force of the inclined seat and gradually returns to its original state until the small end of the expansion sleeve returns to the size that fits the card slot, and then the control arm is taken out of the tooling to complete the machining of the bearing platform of one control arm.

[0012] As can be seen from the above, the utility model realizes the expansion and tightening of the workpiece by using the movement of the internal and external taper. Compared with the prior art, it is convenient to measure the coaxiality of the control arm by using detection tools such as dial indicators during the machining process of the control arm, ensuring that the coaxiality of the control arm after machining meets the requirements, thereby reducing the rejection rate. Moreover, the utility model has the advantages of small deformation, good stability and no traces left in the inner hole. Description of the Drawings

[0013] Figure 1 is the top view of the control arm;

[0014] Figure 2 is the structural schematic diagram of the upper and lower bearing platforms of the control arm;

[0015] Figure 3 is the structural schematic diagram of the utility model;

[0016] Figure 4 is the exploded view of the utility model;

[0017] Figure 5 is the structural schematic diagram of the expansion sleeve of the utility model.

[0018] In the figure, the corresponding relationship between the component names and the drawing reference numbers is:

[0019] 1. Base plate; 2. Inclined seat; 21. Circular shaft part; 22. Frustum part; 23. Groove; 3. Expansion sleeve; 31. Step protrusion; 32. U-shaped groove; 4. Spring; 5. Pressure plate; 51. Card slot; 6. First fastening screw; 7. Second fastening screw. Detailed implementation manner

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying 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 skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] The present invention provides a machining tooling for a control arm, including a base plate 1, an inclined seat 2, an expansion sleeve 3, a spring 4, a pressure plate 5, a first fastening screw 6 and a second fastening screw 7.

[0024] The inclined seat 2 includes a circular shaft part 21 and a frustum part 22 with a smaller upper diameter and a larger lower diameter. The large-diameter end of the frustum part 22 is fixedly connected to the upper end of the circular shaft part 21, and the circular shaft part 21 and the frustum part 22 are integrally machined. The base plate 1 and the inclined seat 2 are fixedly connected by a second fastening screw 7 at the central position, and the upper end surface of the base plate 1 contacts the end of the circular shaft part 21 away from the frustum part 22.

[0025] The expansion sleeve 3 is a ring sleeve structure, and the inner hole of the expansion sleeve 3 is a tapered hole with a large end and a small end. One end of the expansion sleeve 3 is processed with a stepped protrusion 31, and the stepped protrusion 31 is located at the small hole end of the inner hole of the expansion sleeve 3. The expansion sleeve 3 is respectively provided with U-shaped grooves 32 distributed in a ring on the outer circle and the inner hole.

[0026] The expansion sleeve 3 is sleeved on the inclined seat 2, and the large hole end direction of the expansion sleeve 3 is close to the bottom plate 1. The outer circumference of the inclined seat 2 is provided with springs 4 distributed in a ring; the springs 4 are located between the bottom plate 1 and the expansion sleeve 3, and both ends of the springs 4 are fixedly connected to the bottom plate 1 and the expansion sleeve 3 through hooks.

[0027] One end of the inclined seat 2 away from the bottom plate 1 is provided with a groove 23. The pressing plate 5 is a stepped shaft structure, the diameter of the small head end of the pressing plate 5 is matched with the diameter of the groove 23, and the diameter of the large head end of the pressing plate 5 is larger than the diameter of the stepped protrusion 31. The pressing plate 5 is provided with an annular clamping groove 51 on one side of the large head end close to the small head end, and the inner diameter of the clamping groove 51 is matched with the diameter of the stepped protrusion 31. In the assembled state, the small head end of the pressing plate 5 is located in the groove 23, the stepped protrusion 31 is located in the clamping groove 51, and the pressing plate 5 and the inclined seat 2 are fixedly connected by a first fastening screw 6. The pressing plate 5 presses the small end of the expansion sleeve 3 through the clamping groove 51.

[0028] The specific usage mode and function of this embodiment:

[0029] When machining the bearing platform at the lower part of the control arm, the bearing platform at the lower part of the control arm is sleeved on the expansion sleeve 3. The expansion sleeve 3 is pressed down by the weight of the control arm and moves downward along the contour track of the inclined seat 2. When the small end of the expansion sleeve 3 leaves the clamping groove 51 of the pressing plate 5 and is externally supported by the large diameter end of the frustum part 22, the small end of the expansion sleeve 3 is expanded and enlarged, and the bearing platform hole at the lower part of the control arm is tightened, realizing the clamping and fixing of the control arm on the tooling. After the machining of the bearing platform at the lower part of the control arm is completed, first loosen the first fastening screw 6 that fastens the pressing plate 5 and the inclined seat 2. The expansion sleeve 3 moves upward under the action of the spring 4, and during the upward movement of the expansion sleeve 3, the contour of the inclined seat 2 that cooperates with the expansion sleeve 3 gradually becomes smaller, and the expansion sleeve 3 loses the tightening force of the inclined seat 2 and gradually returns and retracts until the small end of the expansion sleeve 3 returns and retracts to the size that cooperates with the clamping groove 51. Then move the control arm upward and take it out of the tooling. Finally, tighten the first fastening screw 6 again to fasten the pressing plate 5 above the inclined seat 2, and the small end of the expansion sleeve 3 is also pressed again in the clamping groove 51. In this way, the machining of the lower bearing platform of one control arm is completed.

[0030] In summary, the utility model realizes the tensioning of the workpiece by means of the movement of the internal and external tapers. Compared with the prior art, it is convenient to measure the coaxiality of the control arm by using detection tools such as dial indicators during the machining process of the control arm, ensuring that the coaxiality of the control arm after machining meets the requirements, thereby reducing the rejection rate. Moreover, the utility model has the advantages of small deformation, good stability, and no traces left on the inner hole, and can be popularized to the machining of special-shaped parts with a similar structure of bearing platforms at both ends.

Claims

1. A machining tool for a control arm, characterized in that: The invention comprises a bottom plate (1), an inclined seat (2), an expansion sleeve (3), a spring (4), a pressure plate (5) and a first fastening screw (6); the inclined seat (2) comprises a round shaft portion (21) and a truncated cone portion (22) which is smaller at the top and larger at the bottom, the large diameter end of the truncated cone portion (22) is fixedly connected to the upper end of the round shaft portion (21), and the round shaft portion (21) and the truncated cone portion (22) are integrally processed; the bottom plate (1) is connected and fixed below the inclined seat (2), and the upper end surface of the bottom plate (1) contacts an end of the round shaft portion (21) away from the truncated cone portion (22); The expansion sleeve (3) is a circular ring sleeve structure, and the inner hole of the expansion sleeve (3) is a tapered hole with one end larger than the other end; one end of the expansion sleeve (3) is processed with a step protrusion (31), and the step protrusion (31) is located at the small hole end of the inner hole of the expansion sleeve (3); the expansion sleeve (3) is provided with U-shaped grooves (32) distributed in a ring on the outer circle and the inner hole respectively; The expansion sleeve (3) is sleeved on the inclined seat (2), and the large hole end of the expansion sleeve (3) is close to the bottom plate (1); the outer periphery of the inclined seat (2) is provided with springs (4) distributed in a ring; the spring (4) is located between the bottom plate (1) and the expansion sleeve (3), and the two ends of the spring (4) are respectively connected and fixed to the bottom plate (1) and the expansion sleeve (3); The end of the inclined seat (2) away from the bottom plate (1) is provided with a groove (23); the pressing plate (5) is a stepped shaft structure, the diameter of the small end of the pressing plate (5) matches the diameter of the groove (23), and the diameter of the large end of the pressing plate (5) is larger than the diameter of the step protrusion (31); the pressing plate (5) is provided with a circular groove (51) on the side of the large end close to the small end, and the inner diameter of the groove (51) matches the diameter of the step protrusion (31); In the assembled state, the small head end of the pressing plate (5) is located in the groove (23), the step protrusion (31) is located in the clamping groove (51), and the pressing plate (5) and the inclined seat (2) are fastened together by a first fastening screw (6).

2. The machining tool for a control arm according to claim 1, characterized in that: The base plate (1) and the inclined seat (2) are fastened together by a second fastening screw (7).

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