A rapid positioning fixture for bearing housing machining

Abstract

The present invention discloses a rapid positioning fixture for bearing housing machining, belonging to the field of machining technology. It includes a circumferential positioning mechanism, a floating support mechanism and a positioning boss arranged at intervals on a bottom plate, and a pressing plate mechanism arranged on the positioning boss. The circumferential positioning mechanism is arranged on one side of the positioning boss and cooperates with it to circumferentially fix the bearing housing. The floating support mechanism assists in supporting the bearing housing. The positioning boss is T-shaped, its shaft part is sleeved in the inner hole of the bearing housing, and the stepped surface supports the end face of the bearing housing. The pressing plate mechanism is located at the top of the positioning boss and cooperates with it to axially fix the bearing housing. The present invention realizes the rapid positioning and clamping of the bearing housing before machining on a machine tool, and has the characteristics of reasonable structure, accurate positioning, simple operation, high efficiency, no energy consumption, improved part machining quality and reduced production cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining, and particularly relates to a rapid positioning fixture for bearing housing machining. Background Art

[0002] In traditional bearing housing machining, the operation method is that after a single bearing housing is cast and formed, lines are drawn to determine the allowance and datum. During machining, the bearing housing is repeatedly adjusted in orientation on the machine tool according to the datum, so as to ensure the unity of the line-drawn datum and the machine tool datum, and then machining is carried out. This alignment and clamping method consumes a long time, has low efficiency, and low positioning accuracy. Moreover, due to manual alignment and clamping, due to the differences in the skill levels of operators, the alignment and clamping of workpieces are prone to errors, leading to quality accidents such as the scrapping and repair of bearing housings, and the quality of bearing housing machining in the same batch is unstable, seriously affecting the product quality of the enterprise. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a rapid positioning fixture for bearing housing machining to solve the problems of complex alignment and clamping process, low efficiency, and unstable quality in bearing housing machining.

[0004] The present invention is realized through the following technical solutions:

[0005] A rapid positioning fixture for bearing housing machining provided by the present invention includes a circumferential positioning mechanism, a floating support mechanism, and a positioning boss arranged at intervals on a bottom plate, and a pressing plate mechanism arranged on the positioning boss. The circumferential positioning mechanism is arranged on one side of the positioning boss and cooperates with it to circumferentially fix the bearing housing. The floating support mechanism assists in supporting the bearing housing. The positioning boss is in a T shape, its shaft part is sleeved in the inner hole of the bearing housing, and the stepped surface supports the end face of the bearing housing. The pressing plate mechanism is located at the top of the positioning boss and cooperates with it to axially fix the bearing housing.

[0006] Adopting the above scheme, the inner hole of the bearing housing of the part to be machined is fitted with the positioning boss to position the bearing housing in the vertical direction and the center of the inner hole; and by rotating the cam of the hexagonal end cover, the circumferential positioning plate connected to the slide plate is pushed forward. The end of the circumferential positioning plate that first contacts the bearing housing pushes the bearing housing to rotate around the center of the positioning boss until both ends of the circumferential positioning plate contact the bearing housing, realizing the circumferential positioning of the bearing housing; then the bearing housing with correct positioning is clamped tightly by the pressing plate mechanism, that is, the rapid positioning and clamping of the bearing housing are completed. In this way, the machining of the peripheral plane and the two end stepped holes of the bearing housing can be completed in one clamping.

[0007] Further, the circumferential positioning mechanism is composed of a slide plate, a circumferential positioning plate, a pin shaft, a cam, and a hexagonal end cover. The circumferential positioning plate is arranged on the slide plate. The slide plate is slidably arranged on the bottom plate. The pin shaft is fixed on the bottom plate. The cam is rotatably arranged on the pin shaft and acts on the slide plate. The hexagonal end cover is arranged on the cam.

[0008] Furthermore, the circumferential positioning plate is of a U-shaped structure, and rotating pressure wheels are provided at both ends thereof, which can be better used in cooperation during the process of pressing against the rotating bearing seat.

[0009] Furthermore, the floating support mechanism is composed of a positioning pin, a disc spring, and a pin seat. The pin seat is fixed on the bottom plate, and the positioning pin is arranged on the pin seat through the disc spring, which plays an auxiliary supporting role and buffers the cutting force during processing to prevent the vibration of the workpiece from affecting the processing quality.

[0010] Furthermore, the floating support mechanism further includes an adjusting nut arranged on the positioning pin.

[0011] Furthermore, the pressing plate mechanism is composed of a pressing plate and a bolt. The pressing plate is a U-shaped clamp, and the bolt is used to connect the pressing plate and the positioning boss.

[0012] The advantages of the present invention are as follows: The present invention solves the problems of complex centering and clamping process, low efficiency, and unstable quality in the processing of bearing seats, improves the production efficiency, reduces quality accidents, and has the advantages of reasonable structure, accurate positioning, simple operation, high efficiency, no energy consumption, improved machining quality of parts, and reduced production costs.

[0013] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings, where:

[0015] Figure 1 is the front view of the structural schematic diagram of the present invention;

[0016] Figure 2 is Figure 1 the top view of

[0017] Figure 3 is Figure 1 the internal structural schematic diagram of the circumferential positioning mechanism in

[0018] Figure 4 is Figure 1 the internal structural schematic diagram of the floating support mechanism;

[0019] Description of component labels: 1 - bearing housing; 2 - base plate; 3 - circumferential positioning mechanism; 4 - floating support mechanism; 5 - positioning boss; 6 - pressing plate mechanism; 7 - slide plate; 8 - circumferential positioning plate; 9 - pin shaft; 10 - cam; 11 - hexagonal end cap; 12 - positioning pin; 13 - disc spring; 14 - pin seat; 15 - adjusting nut. Detailed implementation mode

[0020] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0021] As Figures 1-4 shown, in the rapid positioning fixture for machining the bearing housing in this embodiment, a circumferential positioning mechanism 3, a floating support mechanism 4, and a positioning boss 5 are provided on the base plate 2. The bearing housing 1 to be machined is quickly positioned on the fixture and is pressed by the pressing plate mechanism 6 provided on the positioning boss 5, realizing the rapid positioning and clamping of the bearing housing before machining on the machine tool. Specifically, the circumferential positioning mechanism 3 is arranged on one side of the positioning boss 5 and cooperates with it to circumferentially fix the bearing housing 1. It is composed of a slide plate 7, a circumferential positioning plate 8, a pin shaft 9, a cam 10, and a hexagonal end cap 11. The circumferential positioning plate is arranged on the slide plate. The slide plate is slidably connected to the base plate through a chute or slide rail provided on the base plate. The pin shaft is fixed on the base plate 2, enabling the cam to be rotatably arranged on the pin shaft, and the cam acts on the slide plate. The hexagonal end cap is arranged on the cam; the floating support mechanism 4 is provided with at least two, and is composed of a positioning pin 12, a disc spring 13, a pin seat 14, and an adjusting nut 15. The pin seat 14 is fixed on the base plate 2. The adjusting nut 15 is installed at the lower part of the pin seat 14 and is restricted from rotating. The positioning pin 12 is threadedly connected to the adjusting nut 15, and a disc spring 13 is installed between the inner hole of the upper part of the pin seat 14 and the positioning pin 12. By rotating the positioning pin 12, the deformation amount of the disc spring 13 can be adjusted to meet the required height dimension of the floating support mechanism 4, and the disc spring 13 provides the required supporting force to support the bearing housing 1 and buffers the cutting force during machining to prevent the workpiece from vibrating and affecting the machining quality; in this way, the floating support mechanism and the positioning boss form a three-point and one-plane to assist in supporting the bearing housing 1, and the positioning boss is in a T shape, its shaft part is sleeved in the inner hole of the bearing housing, and the stepped surface supports the end face of the bearing housing. The pressing plate mechanism is located at the top of the positioning boss and cooperates with it to axially fix the bearing housing.

[0022] The machining is carried out by using a quick positioning fixture. By means of its positioning boss and floating support mechanism, the quick and precise installation of the bearing housing is achieved. The quick positioning of the circumferential shape of the rough blank of the bearing housing is also carried out by using the circumferential positioning mechanism, and the workpiece is clamped by the pressing plate mechanism. The whole operation process of the fixture does not require any power equipment such as hydraulic pressure, pneumatic pressure, or electricity. Only through the simple manual operation of the operator can the quick positioning and clamping of the bearing housing be realized. When using this quick positioning fixture to machine the bearing housing, the production efficiency is high, the positioning accuracy is high, the quality is stable, and no energy is consumed, which is suitable for mass production.

[0023] During use, the bottom plate 2 of this fixture is fixed on the working table of the machine tool. The inner hole of the bearing housing 1 is fitted onto the shaft part of the positioning boss 5. The outer circle and the stepped surface of the shaft part of the positioning boss 5 position the inner hole and the end face of the bearing housing 1. The bearing housing 1 is jointly supported by the positioning boss 5 and the floating support mechanism 4. Then, a general tool is used to rotate the hexagonal end cap 11, driving the cam 10 to rotate around the pin shaft 9 fixed on the bottom plate 2. The cam 10 pushes the slide plate 7 to move forward. One end of the circumferential positioning plate 8 integrated with the slide plate 7 that first contacts the bearing housing 1 pushes the bearing housing 1 to rotate around the center of the positioning boss 5 until both ends of the circumferential positioning plate 8 contact the bearing housing 1, realizing the circumferential positioning of the bearing housing 1. After the positioning operation is completed, the pressing plate of the pressing plate mechanism 6 is installed, and the bolt in the pressing plate mechanism 6 is rotated to clamp the bearing housing 1.

[0024] The circumferential positioning plate 8 in this embodiment has a U-shaped structure, and rotating pressure wheels are provided at both ends thereof to better cooperate with the positioning boss to position and fix the bearing housing. And a screw for locking with the pin shaft 9 is provided on the hexagonal end cap 11 to lock the cam and ensure the positioning and fixing work of the circumferential positioning mechanism.

[0025] The pressing plate in the pressing plate mechanism 6 in this embodiment is a U-shaped clamp. By slightly rotating the nut on the bolt, the pressing plate can be installed or removed, quickly clamped or loosened, realizing quick operation.

[0026] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and its equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A rapid positioning fixture for bearing housing machining, characterized in that, It includes a circumferential positioning mechanism (3), a floating support mechanism (4), and a positioning boss (5) that are arranged on a bottom plate (2) at intervals, and a pressing plate mechanism (6) arranged on the positioning boss. The circumferential positioning mechanism is arranged on one side of the positioning boss and cooperates with it to circumferentially fix a bearing housing (1). The floating support mechanism assists in supporting the bearing housing. The positioning boss is in a T shape, its shaft part is sleeved in the inner hole of the bearing housing, and the stepped surface supports the end face of the bearing housing. The pressing plate mechanism is located at the top of the positioning boss and cooperates with it to axially fix the bearing housing; The circumferential positioning mechanism is composed of a slide plate (7), a circumferential positioning plate (8), a pin shaft (9), a cam (10), and a hexagonal end cap (11). The circumferential positioning plate is arranged on the slide plate. The slide plate is slidably arranged on the bottom plate. The pin shaft is fixed on the bottom plate. The cam is rotatably arranged on the pin shaft and acts on the slide plate. The hexagonal end cap is arranged on the cam; The circumferential positioning plate has a U-shaped structure, and rotating pressure wheels are provided at both ends thereof; The floating support mechanism is composed of a positioning pin (12), a disc spring (13), a pin seat (14), and an adjusting nut (15). The pin seat is fixed on the bottom plate. The positioning pin is arranged on the pin seat through the disc spring. The adjusting nut is arranged on the positioning pin; One end of the circumferential positioning plate that first contacts the bearing housing pushes the bearing housing to rotate around the center of the positioning boss until both ends of the circumferential positioning plate contact the bearing housing, realizing the circumferential positioning of the bearing housing.

2. The quick positioning fixture for bearing housing machining according to claim 1, characterized in that The pressing plate mechanism is composed of a pressing plate and a bolt. The pressing plate is a U-shaped clamp, and the bolt is used to connect the pressing plate and the positioning boss.

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