Axle rear axle head press-fitting device

Abstract

The utility model discloses an axle rear axle head press-fitting device, and particularly relates to the field of axle head press-fitting, two sides of the top of a workbench base are fixedly connected with axle tube fixing seats, the tops of the axle tube fixing seats are provided with placing grooves, and the tops of the placing grooves are provided with connecting axle tubes. The shaft head press-in oil cylinder is started through an external power source, the output end of the shaft head press-in oil cylinder drives the shaft head fixing base to move, the shaft head fixing base drives the sliding base to slide along the surface of the linear guide rail, the connecting shaft head and the connecting shaft tube are press-fitted, when the press-fitting device is manufactured, the linear guide rail with high precision is selected as the movable guide rail, the error of the 100mm stroke is very small, and the press-fitting efficiency is high. And bearing positioning parts at the two ends are required to be clamped and machined on numerical control equipment at one time after being assembled. And the coaxiality error of the positioning part of the bearing position is less than 0.05. The coaxiality of shaft head press-in holes of the shaft tube assembly is 0.1, and the coaxiality of bearing positions of the shaft heads at the two ends can be smaller than 0.25 mm after the shaft heads at the two ends are pressed in. Therefore, the effect of high-precision press fitting is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of axle head press-fitting, in particular to a device for pressing the axle head of a rear axle of an axle. Background Art

[0002] The rear axle of a car is divided into a drive axle and a support axle. The support axle is the support axle that supports the car frame and is mainly subject to the gravity of the car. The drive axle folds the power transmitted by the universal transmission device at a 90° angle, changes the direction of force transmission, and reduces the speed through the main reducer, increases the torque, and distributes it to the left and right half shafts and drive wheels through the differential.

[0003] When press-fitting the axle heads at both ends of the rear axle of a vehicle axle, the existing press-fitting device cannot achieve the coaxiality of the axle heads at both ends of the axle head bearing positions to be less than 0.25mm after the axle heads are pressed in. Therefore, inaccurate installation of the axle heads may cause partial wear and deformation of the axle heads when the car is driving. Therefore, the inventor provides a press-fitting device for the axle heads of the rear axle of a vehicle axle to solve the problems raised in the above-mentioned background technology. Utility Model Content

[0004] The utility model aims to provide a device for pressing the axle head of a rear axle of an axle, which has high pressing accuracy for the axle head and the axle tube.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A device for pressing the axle head of a vehicle axle rear axle comprises a workbench base, and cylinder fixing seats are fixedly connected to the top two sides of the workbench base, and linear guide rails are respectively fixedly connected to the two sides of the cylinder fixing seat, and a movable sliding seat is slidably connected to the linear guide rail, and an axle head fixing mechanism is installed on the sliding seat; axle tube fixing seats are fixedly connected to the top two sides of the workbench base, and a placement groove is opened on the top of the axle tube fixing seat, and a connecting axle tube is arranged on the top of the placement groove.

[0007] As a further solution of the utility model: the shaft head fixing mechanism includes a shaft head fixing seat, and a shaft head clamping cylinder is fixedly connected to one side of the top of the shaft head fixing seat; a lower arc plate is fixedly connected to the top of the shaft head fixing seat, and an upper arc plate is fixedly connected to the output end of the shaft head clamping cylinder, and a connecting shaft head is placed on the top of the lower arc plate.

[0008] As a further solution of the utility model: the inner sides of the upper arc plate and the lower arc plate are adapted to the outer surface of the connecting shaft head; one side of the oil cylinder fixing seat is fixedly connected to a circumferential positioning piece of the shaft head.

[0009] As a further solution of the utility model: one side of the oil cylinder fixing seat is fixedly connected to the oil cylinder mounting seat, one side of the oil cylinder mounting seat is fixedly connected to the shaft head pressed into the oil cylinder, and the output end of the shaft head pressed into the oil cylinder passes through the surface of the oil cylinder fixing seat and is fixedly connected to the shaft head fixing seat.

[0010] As a further solution of the utility model: a column is fixedly connected to one side of the shaft tube fixing seat, a leveling cylinder support is fixedly connected to one side of the column, and a shaft tube leveling cylinder is fixedly connected to the inner side of the leveling cylinder support.

[0011] As a further solution of the utility model: the placement groove is "V"-shaped.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The rear axle shaft head press-fitting device of the axle axle, after the connecting shaft head and the connecting shaft tube are fixed, the shaft head press-fitting cylinder is started through an external power supply, the output end of the shaft head press-fitting cylinder drives the shaft head fixing seat to move, and the shaft head fixing seat drives the sliding seat to slide along the surface of the linear guide rail, and the connecting shaft head and the connecting shaft tube are press-fitted. When making the press-fitting device, the moving guide rail uses a high-precision linear guide rail, and the error of the 100mm stroke is very small. The processing of the bearing positioning parts at both ends is required to be completed by clamping and processing on the CNC equipment once after the assembly is completed. Ensure that the coaxiality error of the bearing position positioning part is less than 0.05. The coaxiality of the shaft head press-fitting hole of the shaft tube assembly is 0.1, which can achieve the coaxiality of the bearing positions of the shaft heads at both ends less than 0.25mm after the shaft heads at both ends are pressed in. Thereby achieving the effect of high-precision press-fitting.

[0014] In addition, the rear axle shaft head pressing device of the axle axle is configured to place the connecting shaft head on the top surface of the lower arc plate, and then start the shaft head clamping cylinder through an external power supply. The output end of the shaft head clamping cylinder drives the upper arc plate to move downward to clamp and fix the top surface of the connecting shaft head. Then, the connecting shaft tube is placed on the top of the two placement grooves. Since the placement grooves are V-shaped, the connecting shaft tube will be stuck inside the placement grooves and difficult to flip. Then, the shaft tube leveling cylinder is started through an external power supply. The output end of the shaft tube leveling cylinder extends downward to press the top surface of the connecting shaft tube, thereby achieving the effect of fixing the two ends of the connecting shaft tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the overall structure of a press-fit device for the rear axle head of an axle;

[0016] Figure 2 It is a schematic diagram of the overall structure of a vehicle axle rear axle head press-fitting device from another perspective;

[0017] Figure 3 It is a right side schematic diagram of the overall structure of a press-fit device for the rear axle head of an axle;

[0018] Figure 4 It is a right-view cross-sectional schematic diagram of the overall structure of a vehicle axle rear axle head press-fitting device.

[0019] In the figure: 10, workbench base; 20, cylinder fixing seat; 21, linear guide; 22, sliding seat; 23, shaft head fixing seat; 24, shaft head clamping cylinder; 25, upper arc plate; 26, shaft head circumferential positioning piece; 27, cylinder mounting seat; 28, shaft head pressed into cylinder; 29, lower arc plate; 30, column; 31, shaft tube fixing seat; 32, leveling cylinder support; 33, shaft tube leveling cylinder; 34, placement groove; 40, connecting shaft head; 41, connecting shaft tube. DETAILED DESCRIPTION

[0020] like Figures 1 to 4 As shown, a device for pressing the axle head of a vehicle axle rear axle comprises a workbench base 10, and cylinder fixing seats 20 are fixedly connected to the left and right sides of the top of the workbench base 10, and linear guide rails 21 are fixedly connected to the front and rear sides of the opposite ends of the two cylinder fixing seats 20 respectively, and a movable sliding seat 22 is slidably connected to the linear guide rail 21 on the same side, and an axle head fixing mechanism is installed on the sliding seat 22.

[0021] refer to Figure 1 , 2 The shaft head fixing mechanism includes a shaft head fixing seat 23, a shaft head clamping oil cylinder 24 is fixedly connected to the top rear side of the shaft head fixing seat 23; a lower arc plate 29 is fixedly connected to the top of the shaft head fixing seat 23, and an upper arc plate 25 is fixedly connected to the output end of the shaft head clamping oil cylinder 24. A connecting shaft head 40 is placed on the top of the lower arc plate 29.

[0022] Preferably, the inner sides of the upper arc plate 25 and the lower arc plate 29 are adapted to the outer surfaces of the connecting shaft head 40, and the butt end of the connecting shaft head 40 is exposed on the outside; when in use, the connecting shaft head 40 can be placed on the top surface of the lower arc plate 29, and then the shaft head clamping cylinder 24 is started by an external power supply, and the output end of the shaft head clamping cylinder 24 drives the upper arc plate 25 to move downward to clamp and fix the top surface of the connecting shaft head 40, thereby achieving the effect of axial positioning of the connecting shaft head 40.

[0023] Preferably, the opposite sides of the two cylinder fixing seats 20 are fixedly connected with shaft head circumferential positioning members 26, and the shaft head circumferential positioning members 26 include a disc, and a group of positioning plugs are fixedly connected to the disc. When in use, a group of hole grooves at the outer end of the connecting shaft head 40 are plugged into a group of positioning plugs, so as to achieve the effect of circumferential positioning before the connecting shaft head 40 is fixed, and when the connecting shaft head 40 is plugged into the positioning plugs, the bottom of the connecting shaft head 40 fits against the surface of the lower arc plate 29.

[0024] Specifically, the opposite sides of the two cylinder fixing seats 20 are fixedly connected with cylinder mounting seats 27, and the inner side of the cylinder mounting seats 27 is fixedly connected with a shaft head pressed into the cylinder 28, and the output end of the shaft head pressed into the cylinder 28 passes through the surface of the cylinder fixing seat 20 and is fixedly connected with the shaft head fixing seat 23.

[0025] After the connecting shaft head 40 is fixed, the shaft head pressing cylinder 28 is started by an external power supply, and the output end of the shaft head pressing cylinder 28 drives the shaft head fixing seat 23 to move, and the shaft head fixing seat 23 drives the sliding seat 22 to slide along the surface of the linear guide rail 21.

[0026] refer to Figures 1 to 4 The left and right sides of the top of the workbench base 10 are respectively fixedly connected with an axle tube fixing seat 31, and a placement groove 34 is opened on the top of the axle tube fixing seat 31; the rear side of the axle tube fixing seat 31 is fixedly connected with a column 30, the outer front side of the column 30 is fixedly connected with a leveling cylinder support 32, and the inner side of the leveling cylinder support 32 is fixedly connected with an axle tube leveling cylinder 33.

[0027] Preferably, the shaft tube leveling cylinder 33 adopts a three-axis cylinder with double guide pillars, which has a guiding effect during output.

[0028] Preferably, the placement groove 34 is in a "V" shape, and a connecting shaft tube 41 is placed on the top of the placement groove 34. When in use, the connecting shaft tube 41 is placed on the top of the two placement grooves 34. Since the placement groove 34 is in a V shape, the connecting shaft tube 41 will be stuck inside the placement groove 34 and difficult to flip. Then the shaft tube leveling cylinder 33 is started by an external power supply, and the output end of the shaft tube leveling cylinder 33 extends downward to press the top surface of the connecting shaft tube 41, thereby achieving the effect of fixing the two ends of the connecting shaft tube 41. Cooperating with the extension of the shaft head pressing cylinder 28, the connecting shaft head 40 is gradually pressed into the connecting shaft tube 41. And because the linear guide 21 uses a high-precision straight wire, the 100mm stroke error is very small, and the processing requirements of the bearing positioning parts at both ends are completed by one clamping process on the CNC equipment after the assembly is completed. Ensure that the coaxiality error of the bearing positioning part is less than 0.05mm. The coaxiality of the pressed-in hole of the shaft head of the shaft tube assembly is 0.1mm, and the coaxiality of the bearing positions of the shaft heads at both ends can be less than 0.25mm after the shaft heads at both ends are pressed in.

[0029] The working principle of the utility model is: the connecting shaft head 40 can be placed on the top surface of the lower arc plate 29, and then the shaft head clamping oil cylinder 24 is started by an external power supply, and the output end of the shaft head clamping oil cylinder 24 drives the upper arc plate 25 to move downward to clamp and fix the top surface of the connecting shaft head 40. Then the connecting shaft tube 41 is placed on the top of the two placement grooves 34. Since the placement grooves 34 are V-shaped, the connecting shaft tube 41 will be stuck inside the placement grooves 34 and is difficult to flip. Then the shaft tube leveling cylinder 33 is started by an external power supply, and the output end of the shaft tube leveling cylinder 33 extends downward to press the top surface of the connecting shaft tube 41, thereby achieving the effect of fixing the two ends of the connecting shaft tube 41; then the shaft head pressing oil cylinder 28 is started by an external power supply, and the output end of the shaft head pressing oil cylinder 28 drives the shaft head fixing seat 23 to move, and the shaft head fixing seat 23 drives the sliding seat 22 to slide along the surface of the linear guide rail 21, and the connecting shaft head 40 and the connecting shaft tube 41 are pressed together.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A rear axle head press-fitting device for an axle, comprising a workbench base (10), with oil cylinder fixing seats (20) fixedly connected to both sides of the top of the workbench base (10), characterized in that: The two sides of the oil cylinder fixing seat (20) are respectively fixedly connected with linear guide rails (21), the linear guide rails (21) are slidably connected with a movable sliding seat (22), and the sliding seat (22) is installed with a shaft head fixing mechanism; the two sides of the top of the workbench base (10) are fixedly connected with shaft tube fixing seats (31), the top of the shaft tube fixing seat (31) is provided with a placement groove (34), and the top of the placement groove (34) is provided with a connecting shaft tube (41); The shaft head fixing mechanism comprises a shaft head fixing seat (23), a shaft head clamping oil cylinder (24) being fixedly connected to one side of the top of the shaft head fixing seat (23); a lower arc-shaped plate (29) being fixedly connected to the top of the shaft head fixing seat (23), an upper arc-shaped plate (25) being fixedly connected to the output end of the shaft head clamping oil cylinder (24), and a connecting shaft head (40) being placed on the top of the lower arc-shaped plate (29); One side of the shaft tube fixing seat (31) is fixedly connected to a column (30), one side of the column (30) is fixedly connected to a leveling cylinder support (32), and the inner side of the leveling cylinder support (32) is fixedly connected to a shaft tube leveling cylinder (33).

2. The rear axle head press-fitting device of the vehicle axle according to claim 1, characterized in that: The inner sides of the upper arc plate (25) and the lower arc plate (29) are adapted to the outer surface of the connecting shaft head (40); and a shaft head circumferential positioning piece (26) is fixedly connected to one side of the oil cylinder fixing seat (20).

3. The rear axle head press-fitting device of claim 1, characterized in that: One side of the oil cylinder fixing seat (20) is fixedly connected to an oil cylinder mounting seat (27), and one side of the oil cylinder mounting seat (27) is fixedly connected to a shaft head pressed oil cylinder (28), and the output end of the shaft head pressed oil cylinder (28) penetrates the surface of the oil cylinder fixing seat (20) and is fixedly connected to the shaft head fixing seat (23).

4. The rear axle head press-fitting device of the vehicle axle according to claim 3, characterized in that: The placement groove (34) is in a "V" shape.

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