CN216691916U - High-stability three-axis ball pin - Google Patents

Abstract

The present application relates to a high-stability triaxial ball pin, which comprises a tri-pin seat, a pin shaft, an outer ball ring, a needle roller, a needle-roller washer and a circlip, wherein the needle-roller washer is located at one end of the pin shaft away from the tri-pin seat and It is sleeved on the pin shaft, the needle roller washer is used for abutting the end of the needle roller away from the pin shaft, and the outer diameter of the needle roller washer is larger than the inner diameter of the outer ball ring; the pin shaft is provided with a slot, and the slot is located on the needle roller. The washer is on the side away from the three-pin seat, the circlip is embedded in the groove, a part of the circlip extends out of the groove and abuts with the needle washer, and the end face of the circlip and the needle washer is flat. After the ball washer is sleeved on the pin, the circlip is inserted into the groove. At this time, a part of the circlip is located outside the groove and is in contact with the needle washer, and the end face of the circlip and the needle washer is set. In order to increase the contact area between the circlip and the needle roller washer, it is convenient to better restrict the movement of the needle roller washer in the axial direction and ensure the stable operation of each component.

Description

High Stability Triaxial Ball Pin

technical field

The present application relates to the field of universal joints, and in particular, to a high-stability triaxial ball pin.

Background technique

The universal joint is a mechanism that realizes variable-angle power transmission and is used for positions where the direction of the transmission axis needs to be changed. Universal joints are divided into constant velocity joints, unequal velocity joints and quasi-constant velocity joints. Constant velocity joints connect two shafts whose axes do not overlap, and make the two shafts have the same angular velocity. Mechanisms that transmit motion. The tripod pin is a constant velocity joint.

The three-ball constant velocity joint includes a three-pin seat, a pin shaft, an outer ball ring and a needle roller. Three pins are arranged at equal intervals in the circumferential direction of the three-pin seat and are connected to the three-pin seat, the outer ball ring is sleeved on the pin shaft and there are three, and there is a space between the outer ball ring and the pin for needle rollers. Embedded rolling gap.

When the three-ball constant velocity joint transmits motion, the needle rotates in the rolling gap, and the needle easily slips out of the rolling gap, resulting in unstable operation of the three-ball and affecting the three-ball transmission at the same angular velocity.

Utility model content

In order to ensure the stable operation of the three-ball pin, the present application provides a high-stability three-axis ball pin.

A kind of high-stability triaxial ball pin provided by this application adopts the following technical scheme:

A high-stability triaxial ball pin includes a tri-pin seat, a pin shaft, an outer ball ring and a needle roller. On the pin, and between the outer ball ring and the pin, there is a rolling gap for the needle to be embedded, including a needle washer and a circlip. The needle washer is located at the end of the pin away from the three-pin seat and is sleeved. On the pin shaft, the needle roller washer is used for abutting the end of the needle roller away from the pin shaft, and the outer diameter of the needle roller washer is larger than the inner diameter of the outer ball ring;

The pin shaft is provided with a slot, the slot is located on the side of the needle washer away from the three-pin seat, the retaining spring is embedded in the slot, and a part of the retaining spring extends out of the slot and is connected to the needle washer. contact, and the end surface of the circlip and the needle washer abutting is set as a flat surface.

By adopting the above technical solution, after the ball washer is sleeved on the pin shaft, the circlip is inserted into the groove. At this time, a part of the circlip is located outside the groove and is in contact with the needle washer, and the circlip is connected to the needle. The end face of the washer abutting is set to be flat to increase the contact area between the circlip and the needle washer, so as to better restrict the movement of the needle washer in the axial direction, and then when the needle rolls in the rolling gap, the needle washer It can restrict the needle roller from sliding out of the rolling gap, ensure the stable operation between the components, and realize the purpose of transmitting the movement of the high-stability triaxial ball pin at the same angular velocity.

Preferably, the cross-section of the retaining spring is set as a regular quadrilateral, and the groove wall of the retaining slot is perpendicular to the groove bottom of the retaining slot.

By adopting the above technical solution, the contact area between the surface of the circlip and the groove wall of the circlip is increased. Compared with setting the cross-section of the circlip to a circle, it is convenient to better restrict the circlip from the circlip and ensure the Stability of needle position.

Preferably, there is a space for the axial movement of the outer ball ring between the outer ring of the needle washer and the three-pin seat.

By adopting the above technical solution, by moving the outer ball ring in the axial direction, it is convenient to add lubricant to the needle roller, reduce the friction between the needle roller, the outer ball ring and the pin shaft, and ensure that the needle roller, the outer ball ring and the pin shaft are ensured. The matching accuracy between them improves the running stability of the high-stability triaxial ball pin.

Preferably, it also includes a backing ring, the backing ring is located at one end of the pin shaft close to the three-pin seat and sleeved on the pin shaft, the backing ring is connected with the three-pin seat, and the end face of the backing ring facing away from the three-pin seat is used for For needle roller contact.

By adopting the above technical solution, the needle roller is restricted from sliding out from the rolling gap toward one end of the three-pin seat by the backing ring.

Preferably, there is a space for the needle roller to move axially between the needle roller washer and the backing ring.

By adopting the above technical solution, the needle roller is allowed to move a certain space in the axial direction, and it is convenient to apply lubricant to both ends of the needle roller.

Preferably, the backing ring and the three-pin seat are integrally formed.

By adopting the above technical solution, if a backing ring is additionally provided and sleeved on the pin shaft, the backing ring may move in the axial direction. By setting the backing ring to be integrally formed with the three-pin seat, the backing ring can better limit the position of the needle roller.

Preferably, an undercut groove is provided on the peripheral side of the pin shaft close to one end of the backing ring, and the undercut groove extends for one round in the circumferential direction.

By adopting the above technical solution, during processing, the end face of the pin shaft and the needle roller abutting needs to ensure high precision, so that the high-stability triaxial ball pin has high transmission precision. When the grinding wheel processes the peripheral side of the pin shaft close to one end of the backing ring, the backing ring interferes with the grinding wheel to grind the pin shaft, so the relief groove is provided, so that it is no longer necessary to process the peripheral side of the pin shaft near one end of the backing ring, which is convenient to ensure The matching accuracy between the pin and the needle roller improves the stability.

Preferably, there is a smooth transition between the groove wall of the undercut groove and the groove bottom of the undercut groove.

By adopting the above technical solution, since the pin shaft is provided with an undercut groove, the outer diameter of the pin shaft is suddenly reduced, and a smooth transition is made between the groove wall of the undercut groove and the groove bottom of the undercut groove to avoid the internal stress concentration of the pin shaft. The outer diameter of the pin is smaller to increase the service life.

Preferably, the end surfaces at both ends of the needle roller are set as arc surfaces.

By adopting the above technical solution, the two ends of the needle roller are in point contact with the backing ring or the needle roller washer, so that the contact area is small, reducing the debris generated by the friction between the needle roller and the backing ring or the needle roller washer, ensuring that the The matching accuracy between the needle roller, the outer ball ring and the pin shaft ensures the stability of the needle roller during operation.

To sum up, the present application includes at least one of the following beneficial technical effects:

1. After the ball washer is sleeved on the pin, insert the circlip into the groove. At this time, a part of the circlip is located outside the groove and abuts against the needle washer, and the circlip is in contact with the needle washer. The end face is set to be flat to increase the contact area between the circlip and the needle roller washer, so as to better restrict the needle roller washer from moving in the axial direction, and then when the needle roller rolls in the rolling gap, the needle roller washer can restrict the needle roller washer It slides out from the rolling gap to ensure the stable operation between the components, and realizes the purpose of transmitting the movement of the high-stability triaxial ball pin at the same angular velocity.

2. If an additional backing ring is provided and sleeved on the pin shaft, the backing ring may move in the axial direction. By setting the backing ring to be integrally formed with the three-pin seat, the backing ring can better limit the position of the needle roller.

During processing, the end face where the pin shaft and the needle roller fit need to ensure high precision, so that the high-stability triaxial ball pin has high transmission precision. When the grinding wheel processes the peripheral side of the pin shaft close to one end of the backing ring, the backing ring interferes with the grinding wheel to grind the pin shaft, so the relief groove is provided, so that it is no longer necessary to process the peripheral side of the pin shaft near one end of the backing ring, which is convenient to ensure The matching accuracy between the pin and the needle roller improves the stability.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure in the embodiment of the present application.

FIG. 2 is a cross-sectional view of an embodiment of the present application.

Figure 3 is a schematic diagram of the structure of the three-pin seat, the pin shaft, the backing ring and the needle roller.

Description of reference numerals: 1, three-pin seat; 2, pin shaft; 21, card groove; 22, undercut 3, outer ball ring; 4, needle roller; 5, rolling clearance; 6, needle roller washer; 7, Circlip; 8. Backing ring.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-3.

Referring to FIG. 1 and FIG. 2 , an embodiment of the present application discloses a high-stability triaxial ball pin comprising a tri-pin seat 1 , a pin shaft 2 , an outer ball ring 3 and a needle roller 4 .

Three pin shafts 2 are provided at equal intervals in the circumferential direction of the three-pin seat 1 , and one end of the pin shaft 2 is fixedly connected with the three-pin seat 1 . The outer ball ring 3 is sleeved on the pin shaft 2 , and three outer ball rings 3 are provided corresponding to the three pin shafts 2 , and there is a rolling gap 5 between the inner diameter of the outer ball ring 3 and the outer circumference of the pin shaft 2 . The needle roller 4 is located in the rolling gap 5. The axis of the needle roller 4 is parallel to the axis of the pin shaft 2. There are multiple needle rollers 4 along the circumferential direction of the pin shaft 2. The plurality of needle rollers 4 rotate and fit together, and the needle rollers 4 are connected in rotation. On the inner ring of the outer ball head and the outer circumference of the pin 2. In this embodiment, the pin shaft 2 and the three-pin seat 1 are integrally formed.

Referring to FIG. 2 , a high-stability triaxial ball pin further includes a needle washer 6 , a retaining spring 7 and a backing ring 8 .

The needle roller washer 6 is located at the end of the outer ball ring 3 away from the three-pin seat 1 and is sleeved on the pin shaft 2. The outer diameter of the needle roller washer 6 is larger than the inner diameter of the outer ball ring 3, and the needle roller washer 6 faces the end face of the three-pin seat 1 It is used for the contact between the outer ball ring 3 and the needle roller 4.

The pin shaft 2 is provided with a clamping groove 21 , the clamping groove 21 is located on the side of the needle washer 6 away from the three-pin seat 1 , and the clamping groove 21 extends for a circle along the circumferential direction of the pin shaft 2 . The retaining spring 7 is embedded in the retaining slot 21 , the outer ring of the retaining spring 7 extends out of the retaining slot 21 , and the end surface of the retaining spring 7 facing the three-pin seat 1 is in surface contact with the needle roller washer 6 . The cross section of the retaining spring 7 is set as a regular quadrilateral, and the groove wall of the retaining slot 21 is perpendicular to the groove bottom of the retaining slot 21, so that the surface of the retaining spring 7 is between the groove wall of the retaining slot 21 and the groove bottom of the retaining slot 21. For surface contact, it is better to limit the slipping of the retaining spring 7 from the retaining slot 21 .

There is space for the outer ball ring 3 to move axially between the needle roller washer 6 and the three-pin seat 1, so as to add lubricant to the rolling gap 5 and reduce the needle roller 4, the outer ball ring 3 and the pin shaft 2 friction between them.

2 and 3 , the backing ring 8 is located at one end of the pin shaft 2 close to the three-pin seat 1 , the backing ring 8 is sleeved on the pin shaft 2 , and the backing ring 8 and the three-pin seat 1 are integrally formed. The end face of the backing ring 8 away from the three-pin seat 1 is used for one end of the needle roller 4 to abut, and there is a space for the needle roller 4 to move axially between the backing ring 8 and the needle roller washer 6 . Both ends of the needle roller 4 are used to abut with the needle roller washer 6 and the backing ring 8 respectively, and the ends of both ends of the needle roller 4 are set as arc surfaces, so that the gap between the needle roller 4 and the needle roller washer 6 and the backing ring 8 is For point contact, the friction between the needle roller 4 and the needle roller washer 6 and backing ring 8 is reduced.

Referring to FIG. 3 , the peripheral side of the pin shaft 2 close to one end of the backing ring 8 is provided with an undercut 22 , and the undercut 22 extends for one round in the circumferential direction. Since the backing ring 8 interferes with the grinding wheel when the grinding wheel processes the end face of the pin shaft 2 and the needle roller 4, the setting of the undercut 22 eliminates the need to grind the peripheral side of the pin shaft 2 close to the backing ring 8, so as to ensure The matching accuracy between the needle roller 4 and the pin shaft 2 and the smooth transition between the groove wall of the undercut groove 22 and the groove bottom of the undercut groove 22 prevent the internal stress of the pin shaft 2 from being excessively concentrated.

The three-pin seat 1 , the pin shaft 2 and the backing ring 8 are integrally formed. In order to ensure that the embodiment of the present application can transmit motion at the same angular velocity, in the past, the pin shaft 2 was positioned during machining by setting a center hole to ensure the machining accuracy. . However, in the embodiment of the present application, there is no need to provide a center hole, and the three-pin seat 1 , the pin shaft 2 and the backing ring 8 are processed by means of automatic tri-section machining of the processing equipment, and the processing step of additionally setting the center hole is omitted.

The implementation principle of a high-stability triaxial ball pin in the embodiment of the present application is as follows:

During installation, the needle roller washer 6 is sleeved on the pin shaft 2, the circlip 7 is embedded in the groove 21, and the end face of the circlip 7 is in contact with the needle roller washer 6 to better restrict the needle roller washer 6. move along the axis. Therefore, the needle roller washer 6 and the backing ring 8 jointly restrict the movement of the needle roller 4 in the axial direction, so as to ensure the running stability of the needle roller 4 and further ensure the running stability of the high-stability triaxial ball pin.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (9)

1. The utility model provides a high stability three axis type ball round pin, includes tripod seat (1), round pin axle (2), outer ball ring (3) and kingpin (4), round pin axle (2) are equipped with threely about tripod seat (1) circumference equidistant, round pin axle (2) are located to outer ball ring (3) cover, just there is rolling clearance (5) owing to supply kingpin (4) embedding between outer ball ring (3) and round pin axle (2), its characterized in that: the roller pin gasket comprises a roller pin gasket (6) and a clamp spring (7), wherein the roller pin gasket (6) is positioned at one end, away from a three-pin seat (1), of a pin shaft (2) and sleeved on the pin shaft (2), the roller pin gasket (6) is used for enabling one end, away from the pin shaft (2), of a roller pin (4) to be abutted, and the outer diameter of the roller pin gasket (6) is larger than the inner diameter of an outer ball ring (3);

the novel needle roller is characterized in that a clamping groove (21) is formed in the pin shaft (2), the clamping groove (21) is located on one side, away from the three-pin seat (1), of the needle roller gasket (6), the clamp spring (7) is embedded into the clamping groove (21), one part of the clamp spring (7) extends out of the clamping groove (21) and is abutted against the needle roller gasket (6), and the end faces, abutted against the needle roller gasket (6), of the clamp spring (7) are arranged to be planes.

2. The high stability triaxial ball pin of claim 1, wherein: the cross section of the clamp spring (7) is designed to be a regular quadrangle, and the groove wall of the clamping groove (21) is perpendicular to the groove bottom of the clamping groove (21).

3. The high stability three axis ball pin of claim 1, wherein: and a space for the axial movement of the outer ball ring (3) is formed between the outer ring of the needle roller gasket (6) and the tripod seat (1).

4. The high stability triaxial ball pin of claim 1, wherein: the novel needle roller bearing is characterized by further comprising a backing ring (8), wherein the backing ring (8) is located at one end, close to the three-pin base (1), of the pin shaft (2) and sleeved on the pin shaft (2), the backing ring (8) is connected with the three-pin base (1), and the end face, deviating from the three-pin base (1), of the backing ring (8) is used for supporting the needle roller (4) to abut against.

5. The high stability triaxial ball pin of claim 4, wherein: and a space for the axial movement of the needle roller (4) is reserved between the needle roller gasket (6) and the backing ring (8).

6. The high stability triaxial ball pin of claim 4, wherein: the backing ring (8) and the three-pin seat (1) are integrally formed.

7. The high stability triaxial ball pin of claim 6, wherein: the periphery of one end, close to the backing ring (8), of the pin shaft (2) is provided with a tool withdrawal groove (22), and the tool withdrawal groove (22) extends for a circle along the circumferential direction.

8. The high stability triaxial ball pin of claim 7, wherein: the groove wall of the tool withdrawal groove (22) and the groove bottom of the tool withdrawal groove (22) are in smooth transition.

9. The high stability triaxial ball pin of claim 1, wherein: the end faces of two ends of the roller pin (4) are cambered surfaces.

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