Grinding head special for ball groove of inner ball cage

Abstract

The utility model discloses a special grinding head for a ball groove of an inner ball cage, which is characterized in that the special grinding head comprises a hollow rod body, a through hole II is arranged at the right end of the rod body, an input rod is arranged in the through hole II through a bearing II, a driving wheel is fixed at the upper end of the input rod, and an input joint is fixed at the lower end of the input rod; a through hole I is formed in the left end of the rod body, the output rod is installed in the through hole I through a bearing, a driven wheel is fixed to the upper end of the output rod, the driving wheel and the driven wheel are connected through a conveying belt, a grinding wheel is fixed to the lower end of the output rod, and a channel is formed in the middle of the rod body, distributed in the length direction of the rod body and penetrates through the middle of the bearing I and the middle of the bearing II. The two ends of the channel are sealed through end covers, the driving wheel and the driven wheel are belt wheels, and the conveying belt is a belt. Convex teeth matched with each other are arranged among the driving wheel, the driven wheel and the belt, a mounting seat is arranged at the lower end of the output rod, a disc is arranged in the middle of the mounting seat, and a grinding wheel is fixed at the bottom end of the mounting seat through a grinding wheel seat.

Description

Technical Field

[0001] The technical solution relates to a mechanical processing tool, in particular to a special grinding head for an inner ball cage ballway. Background Art

[0002] As we all know, the car's ball joint, also known as the "constant velocity joint", is an important component in the car's transmission system. It is mainly used to connect the power transmission between the engine and the drive wheel to ensure that during the driving process of the car, even if there is an angle change between the wheel and the drive shaft, the power can be transmitted smoothly and accurately.

[0003] The ball cage shell (ball cage shell for short) is one of the important components. Figure 3 As shown, there are multiple raceways (or ball tracks) inside. The rollers (or ball wheels) of the universal joint need to roll in the raceways. The inner ball cage is an important component related to automobile safety. The coordination requirements between the rollers and the raceways are very high. Limited by process precision, there are certain processing errors in the universal joint and the ball cage shell, which makes it difficult to put the rollers into the raceways at the same time after the universal joint is assembled. There are two solutions, namely, widening the raceways or grinding smaller rollers. Due to the narrow roller track and the difficulty in grinding, companies usually choose to grind smaller rollers. Also limited by processing precision, grinding rollers is still very difficult, and it is difficult to grind different rollers consistently. The final feedback to the inner ball cage product is that the universal rotation is not smooth enough, and the product quality is not high. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a special grinding head for the inner ball cage raceway which is convenient for grinding the raceway of the ball cage shell, thereby solving the technical problem of lack of suitable processing equipment. At the same time, the equipment also has the characteristics of good stability, safety, high efficiency and good consistency.

[0005] The grinding head specially used for the inner ball cage fairway is characterized in that it comprises a hollow rod body, a through hole II is opened at the right end of the rod body, an input rod is installed in through hole II through bearing II, a driving wheel is fixed to the upper end of the input rod, and an input joint is fixed to the lower end of the input rod; a through hole I is opened at the left end of the rod body, an output rod is installed in through hole I through a bearing, a driven wheel is fixed to the upper end of the output rod, the driving wheel and the driven wheel are connected by a transmission belt, and a grinding wheel is fixed to the lower end of the output rod.

[0006] The middle part of the rod body is a channel, which is distributed along the length direction of the rod body. The channel is connected to the middle parts of bearings I and II, and both ends of the channel are sealed by end covers.

[0007] The driving wheel and the driven wheel are belt pulleys, and the transmission belt is a belt. The driving wheel, the driven wheel and the belt are provided with convex teeth that cooperate with each other.

[0008] The lower end of the output rod is a mounting seat, a disc is arranged in the middle of the mounting seat, and the grinding wheel is fixed on the bottom end of the mounting seat through a grinding wheel seat.

[0009] This technical solution solves the problem of not having a suitable special tool to grind the raceway of the ball cage shell. Through the use of this device, the grinded raceway has good consistency, good product quality, high grinding efficiency, and also achieves the technical effect of long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the connection structure between the driving wheel and the belt of the utility model;

[0012] Figure 3 This is a schematic diagram of the three-dimensional structure of the ball cage shell processed by the utility model Figure 1 ;

[0013] Figure 4 This is a schematic diagram of the three-dimensional structure of the ball cage shell processed by the utility model Figure 2 .

[0014] Explanation of the reference numerals: 1 driven wheel, 2 output rod, 3 rod body, 4 bearing I, 5 channel, 6 disc, 7 mounting seat, 8 grinding wheel seat, 9 grinding wheel, 10 input rod, 11 driving wheel, 12 bearing II, 13 input joint, 14 transmission belt, 15 gasket, 16 ball cage shell, 16-1 raceway. DETAILED DESCRIPTION

[0015] Embodiment 1, a grinding head specially used for inner ball cage fairway, characterized in that it comprises a hollow rod body 3, a through hole II is opened at the right end of the rod body, an input rod 10 is installed in through hole II through bearing II 12, a driving wheel 11 is fixed to the upper end of the input rod, and an input joint 13 is fixed to the lower end of the input rod; a through hole I is opened at the left end of the rod body, an output rod 2 is installed in through hole I through a bearing, a driven wheel 1 is fixed to the upper end of the output rod, the driving wheel and the driven wheel are connected by a transmission belt 14, and a grinding wheel 9 is fixed to the lower end of the output rod.

[0016] The middle part of the rod body is a channel 5, which is distributed along the length direction of the rod body. The channel is connected to the middle part of the bearing I 4 and the bearing II, and both ends of the channel are sealed by end covers.

[0017] The driving wheel and the driven wheel are belt pulleys, and the transmission belt is a belt. The driving wheel, the driven wheel and the belt are provided with convex teeth that cooperate with each other.

[0018] The lower end of the output rod is a mounting seat 7, a disc 6 is arranged in the middle of the mounting seat, and a grinding wheel is fixed to the bottom end of the mounting seat through a grinding wheel seat 8.

[0019] Washers 15 are provided at the intersection of the bearing I and the output rod, and at the intersection of the bearing II and the input rod.

[0020] The method of using this scheme is as follows: 1. Before processing, use a machine tool to clamp the ball cage shell 16, so that the ball cage shell is fixed and the opening is upward; then use a fixture with a track to clamp the rod body of the device, and connect the input connector to the output end of the motor. The motor and the rod body can be fixed on the same fixture. The principle is to extend the grinding wheel of the device into the raceway of the ball cage shell, and the two can move relative to each other. 2. During processing, the slide rail moves down to move the rotating grinding wheel into the raceway of the ball cage shell, and the grinding wheel grinds the raceway.

[0021] Further explanation of this technical solution:

[0022] In this solution, the sleeve (or chuck) at the output end of the motor is connected to the input connector to provide rotational power for the input rod, so that the driving wheel rotates. The driving wheel drives the driven wheel to rotate through the transmission belt (belt), thereby rotating the grinding wheel for grinding, which solves the problem of not having suitable special tools to grind the ball cage shell raceway. The raceway polished by this device has high consistency, and after being installed in the universal joint for testing, it is very smooth and smooth, with good quality, and the grinding efficiency is significantly improved;

[0023] Before designing this scheme, various transmission methods have been tested, such as setting a connecting rod and a bevel gear in the rod body or setting a belt and a pulley in the rod body, but none of them can achieve the effect of this technical scheme. The reason is that since the ball cage shell itself is not large, the rod body can only be reduced in size to penetrate the ball cage shell, and the belt or gear arranged in the rod will be even smaller. However, grinding requires high-speed movement, and the small gear cannot maintain high temperature for a long time and will slip, and the service life is extremely short. The belt is the same. Due to the restriction of the inner diameter width of the rod, the width of the belt can only be very small. In addition, the rod body is a closed environment, and the temperature rises rapidly after the machine is started, and the belt is also easy to break. Therefore, this scheme sets the driving wheel and the driven wheel on the outside of the rod body. First, there is enough space to increase the width of the gear and the belt, so that the belt is stronger and the service life is increased. The contact surface between the belt and the wheel is wider and not easy to slip; second, the wheel can be appropriately enlarged and the gear teeth can be thickened to withstand greater kinetic energy and increase the intensity of grinding; third, the heat dissipation effect is good, maintenance is easier, and the cost is lower;

[0024] The disc can protect the through hole and prevent metal debris generated during grinding from entering the through hole;

[0025] This solution is provided with a channel, and lubricating oil or grease can be added into the channel to reduce friction and wear, reduce noise and vibration, and improve operating efficiency. Both ends of the channel are sealed by detachable end covers;

[0026] The gaskets installed on the bearings can adapt to thermal expansion, reduce shock and resist wear.

[0027] In summary, this technical solution solves the problem of not having a suitable special tool to grind the raceway of the ball cage shell. Through the use of this device, the grinded raceway has good consistency, good product quality, high grinding efficiency, and a long service life.

Claims

1. The special grinding head for inner ball cage ballway is characterized by: It includes a hollow rod body, a through hole II is opened at the right end of the rod body, an input rod is installed in the through hole II through a bearing II, a driving wheel is fixed to the upper end of the input rod, and an input joint is fixed to the lower end of the input rod; a through hole I is opened at the left end of the rod body, an output rod is installed in the through hole I through a bearing, a driven wheel is fixed to the upper end of the output rod, the driving wheel and the driven wheel are connected by a transmission belt, and a grinding wheel is fixed to the lower end of the output rod. The middle part of the rod body is a channel, the channel is distributed along the length direction of the rod body, the channel is connected to the middle part of the bearing I and the bearing II, and both ends of the channel are sealed by end covers.

2. The inner ball cage ballway special grinding head according to claim 1 is characterized in that: The driving wheel and the driven wheel are pulleys, the transmission belt is a belt, and mutually matching convex teeth are arranged between the driving wheel, the driven wheel and the belt.

3. The inner ball cage ballway special grinding head according to claim 1 is characterized in that: The lower end of the output rod is a mounting seat, a disc is arranged in the middle of the mounting seat, and the grinding wheel is fixed on the bottom end of the mounting seat through a grinding wheel seat.

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