Linear motion structure capable of transmitting torque

Abstract

The utility model provides a linear motion structure capable of transmitting torque. The device comprises a sliding sleeve, a mandrel and balls, the sliding sleeve is provided with a circulating channel and a hollow structure, and the hollow structure is provided with an inner raceway; the mandrel is provided with an outer roller path, the mandrel is located in the hollow structure, and the outer roller path and the inner roller path are arranged in a matched mode to form a containing channel; the multiple balls are located in the containing channel and the circulating channel, and the containing channel communicates with the circulating channel. The rolling ball circulating devices are arranged at the two ends of the sliding sleeve, the rolling ball circulating devices, the mandrel and the sliding sleeve form a complete circulating rolling way, and when the sliding sleeve axially moves relative to the mandrel, the rolling balls circulate in the rolling way; different from a traditional linear bearing, the linear bearing not only can realize low-friction rolling motion in the horizontal direction, but also can bear torque, and the torque of the mandrel can be transmitted to the sliding sleeve.

Description

Technical Field

[0001] This utility model relates to vehicle braking technology, specifically to a linear motion structure that can transmit torque based on ball friction. Background Technology

[0002] Currently, disc brakes for vehicles on the market are mainly divided into two categories based on the power transmission medium: pneumatic and hydraulic. However, pneumatic and hydraulic braking systems generally suffer from problems such as complex structure, environmental pollution, slow response, and complex control, making them unable to adapt to the future development trend of intelligent and drive-by-wire vehicles.

[0003] In response, existing technologies have developed linear motion mechanisms based on motor drives. The power provided by the motor is converted into linear thrust through a conversion unit, and the linear motion structure can then brake the vehicle.

[0004] However, existing mechanisms that convert torque into linear motion often have certain problems, namely, the large friction generated during linear motion, which makes the motion less smooth and the parts more prone to damage. Utility Model Content

[0005] To address the problems existing in the above-mentioned technologies, this utility model provides a technology for reducing friction in linear motion structures.

[0006] The present invention first provides a linear motion structure capable of transmitting torque, which includes a sliding sleeve, a spindle, and balls;

[0007] The sliding sleeve has a circulation channel and a hollow structure, the hollow structure having an inner raceway;

[0008] The mandrel has an outer raceway, and the mandrel is located inside the hollow structure. The outer raceway and the inner raceway are arranged together to form a receiving channel.

[0009] Multiple balls are located in the receiving channel and the circulation channel, the receiving channel being connected to the circulation channel.

[0010] Preferably, the sliding sleeve includes a sliding sleeve body, a first reverser, and a second reverser. The sliding sleeve body has mounting grooves at both ends, and the first reverser and the second reverser are respectively disposed in the mounting grooves at both ends. Both the first reverser and the second reverser have reverse raceways.

[0011] The sliding sleeve body has a main channel, and the reverse raceway of the first reverser, the main channel, and the reverse raceway of the second reverser constitute the circulation channel.

[0012] Preferably, the first and second reversers have a reverse hole and a reverse body portion, the reverse hole being disposed at the center of the reverse body portion, and the reverse body portion having a side surface;

[0013] The reverse raceway has a first port and a second port, the first port being located on the reverse hole and the second port being located on the side.

[0014] The first port is connected to the receiving channel, and the second port is connected to the main channel.

[0015] Preferably, the mandrel has multiple sets of outer raceways arranged in the axial direction, and the hollow structure has multiple sets of inner raceways arranged in the axial direction.

[0016] Preferably, both the inner raceway and the outer raceway are semi-circular raceway structures, and the inner raceway and the outer raceway are aligned to form a circular raceway structure, which serves as the receiving channel.

[0017] Preferably, the edge of the mounting groove has a positioning slot, and the first reverser and the second reverser are mounted in the positioning slot by positioning pins.

[0018] Preferably, the number of positioning slots and positioning pins is three sets, and the three sets of positioning slots are evenly arranged around the circumference.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. Both ends are equipped with ball circulation devices, which together with the spindle and the sliding sleeve form a complete circulation raceway. When the sliding sleeve moves axially relative to the spindle, the balls circulate repeatedly in the raceway.

[0021] 2. The sliding sleeve has a hollow structure with an axial raceway inside the hole, as well as a circumferentially distributed circulation channel;

[0022] 3. Multiple evenly distributed axial raceways are provided on the circumference of the mandrel, which cooperate with the sliding sleeve with inner raceways;

[0023] 4. It can transmit torque. When transmitting torque, the angle between the line connecting the first contact point and the second contact point and the diameter of the raceway is an acute angle.

[0024] 5. Unlike traditional linear bearings, this solution can achieve low-friction rolling motion in the horizontal direction while also bearing torque, and can transmit the torque of the spindle to the sliding sleeve. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the linear motion structure capable of transmitting torque according to this utility model.

[0026] Figure 2This is a schematic diagram of the sliding sleeve of the linear motion structure capable of transmitting torque according to this utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of the linear motion structure capable of transmitting torque according to this utility model.

[0028] Figure 4 This is the utility model Figure 3 A structural schematic diagram of the AA cross-sectional view;

[0029] Figure 5 This is a schematic diagram of the mandrel of the linear motion structure capable of transmitting torque according to this utility model;

[0030] Figure 6 This is a schematic diagram of the linear motion structure of the ball bearing capable of transmitting torque in the receiving channel and the circulation channel of this utility model.

[0031] Figure 7 This is an exploded structural diagram of the ball bearing and its surrounding structure of the linear motion structure capable of transmitting torque according to this utility model.

[0032] Figure 8 This is a schematic diagram of the exploded structure of the linear motion structure capable of transmitting torque according to this utility model.

[0033] Figure 9 This is a schematic diagram of the reversing device of the linear motion structure capable of transmitting torque according to this utility model.

[0034] Figure 10 This is a schematic diagram of the overall structure of the linear motion structure capable of transmitting torque according to this utility model.

[0035] Figure 11 This is the utility model Figure 10 A structural schematic diagram of the BB cross-sectional view;

[0036] Figure 12 This is a schematic diagram of the ball bearings of the linear motion structure capable of transmitting torque according to this utility model, distributed along the circumferential direction.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Sliding sleeve; 11-Sliding sleeve body; 111-Main body channel; 112-Mounting groove; 1121-Positioning groove hole; 12-First reverser; 13-Second reverser; 121-Reverse raceway; 122-First port; 123-Second port; 131-Reverse hole; 132-Reverse main body; 133-Side;

[0039] 15-Hollow structure; 151-Inner raceway; 16-Accommodation channel; 17-Positioning pin;

[0040] 2-Mandrel; 21-Outer raceway;

[0041] 3-Ball; 31-First contact point; 32-Second contact point;

[0042] 4- Mounting clamp body; 5- Brake disc; 6- Linear motion structure capable of transmitting torque. Detailed Implementation

[0043] Example 1:

[0044] like Figure 1-7 As shown, the present invention first provides a linear motion structure capable of transmitting torque, which includes a sliding sleeve 1, a spindle 2, and balls 3;

[0045] The sliding sleeve 1 has a circulation channel and a hollow structure 15, wherein the hollow structure 15 has an inner raceway 151;

[0046] like Figure 4 , 5 As shown, the mandrel 2 has an outer raceway 21, the mandrel 2 is located inside the hollow structure 15, and the outer raceway 21 and the inner raceway 151 are arranged to form a receiving channel 16.

[0047] like Figure 6 , 7 As shown, a plurality of the balls 3 are located in the receiving channel 16 and the circulation channel, and the receiving channel 16 is connected to the circulation channel.

[0048] In practical applications, the spindle 2 receives rotational power from the motor. When the spindle 2 rotates, it provides power to the sliding sleeve 1 through the ball bearings 3, thereby achieving stable torque transmission and driving the sliding sleeve 1 to rotate accordingly. In addition, when it is necessary to adjust the relative position between the spindle 2 and the sliding sleeve 1, an external force is applied to the sliding sleeve 1. The spindle 2 remains stationary, and the sliding sleeve 1 can move axially. During the axial movement, the ball bearings 3 can move within the channel, resulting in low friction and smooth sliding, thus avoiding excessive wear and tear on the components.

[0049] The process of converting torque into linear thrust occurs when the spindle 2 receives a rotational drive. If the sliding sleeve 1 is restricted from circumferential rotation by an external force (but not from axial movement), then the sliding sleeve 1 can undergo axial linear motion, thus forming a ball screw-type linear thrust conversion. This structure can be applied, for example, to braking systems to convert torque into linear thrust for braking, or to other mechanical structures.

[0050] Example 2:

[0051] like Figure 2 , 8As shown, preferably, the sliding sleeve 1 includes a sliding sleeve body 11, a first reverser 12 and a second reverser 13. The sliding sleeve body 11 has mounting grooves 112 at both ends, and the first reverser 12 and the second reverser 13 are respectively disposed in the mounting grooves 112 at both ends. The first reverser 12 and the second reverser 13 both have reverse raceways 121. The first reverser 12 and the second reverser 13 are disposed in the mounting grooves 112 in a detachable manner, which facilitates the disassembly and maintenance of the channel and the internal ball bearings 3.

[0052] like Figure 9 As shown, the sliding sleeve body 11 has a main channel 111, and the reverse raceway 121 of the first reverser 12, the main channel 111, and the reverse raceway 121 of the second reverser 13 constitute the circulation channel.

[0053] Preferably, the first reverser 12 and the second reverser 13 have a reverse hole 131 and a reverse body portion 132. The reverse hole 131 is disposed at the center of the reverse body portion 132, and the reverse body portion 132 has a side surface 133. The spindle 2 is configured to cooperate with the reverse hole 131, so that the receiving channel 16 on the spindle 2 is aligned and connected with the reverse raceways 121 at both ends for the cyclic movement of the ball 3.

[0054] The reverse raceway 121 has a first port 122 and a second port 123, the first port 122 being located on the reverse hole 131 and the second port 123 being located on the side 133;

[0055] The first port 122 is connected to the receiving channel 16, and the second port 123 is connected to the main channel 111. That is, the main channel 111 forms a complete annular channel with the receiving channel 16 through the reverse raceways 121 at both ends for the movement of the ball bearings.

[0056] Preferably, the mandrel 2 has multiple sets of outer raceways 21 arranged in the axial direction, and the hollow structure 15 has multiple sets of inner raceways 151 arranged in the axial direction. Each set of outer raceways 21 and inner raceways 151 cooperate to form a receiving channel 16.

[0057] Preferably, both the inner raceway 151 and the outer raceway 21 are semi-circular raceway structures, and the inner raceway 151 and the outer raceway 21 are aligned to form a circular raceway structure, which is the receiving channel 16.

[0058] As can be seen from the above structure, the receiving channel 16, the reverse raceway 121 of the first reverser 12, the main channel 111, and the reverse raceway 121 of the second reverser 13 constitute a complete annular channel. When the spindle 2 and the sliding sleeve 1 slide relative to each other, the balls play a sliding role and reduce friction.

[0059] exist Figure 11 In this arrangement, when the spindle 2 rotates counterclockwise, the contact point between a certain ball 3 and the spindle 2 is the second contact point 32, and the contact point between the ball 3 and the sliding sleeve 1 is the first contact point 31. The angle between the line ab connecting the first contact point 31 and the second contact point 32 and the vertical diameter direction cd is an acute angle. This arrangement makes it easier for forces to be transmitted and converted. In this way, the force distribution of the entire structure is more reasonable, and the torque that can be transmitted is greater under the same size.

[0060] Preferably, the mounting groove 112 has a positioning slot 1121 at its edge, and the first reverser 12 and the second reverser 13 are mounted in the positioning slot 1121 by positioning pins 17. This structure allows the first reverser 12 and the second reverser 13 to be easily and quickly connected to the mounting groove 112.

[0061] Preferably, the number of positioning slots 1121 and positioning pins 17 is three sets, and the three sets of positioning slots 1121 are evenly arranged around the circumference.

Claims

1. A torque-transmitting linear motion structure, characterized by, Comprising: a sliding sleeve (1) having a circulation channel and a hollow structure (15) with an inner raceway (151); a mandrel (2) having an outer raceway (21) arranged in the hollow structure (15) to form an accommodation channel (16) in cooperation with the inner raceway (151); a plurality of balls (3) arranged in the accommodation channel (16) and the circulation channel, the accommodation channel (16) being in communication with the circulation channel.

2. The torque-transmittable linear motion structure according to claim 1, characterized by, The sliding sleeve (1) comprises a sliding sleeve body (11), a first reverser (12) and a second reverser (13), both ends of the sliding sleeve body (11) are provided with mounting grooves (112), and the first reverser (12) and the second reverser (13) are arranged in the mounting grooves (112) at both ends respectively.

3. The torque-transmissible linear motion structure according to claim 2, characterized by, Both the first reverser (12) and the second reverser (13) have a reverse raceway (121). The sliding sleeve body (11) has a body channel (111), and the reverse raceway (121) of the first reverser (12), the body channel (111) and the reverse raceway (121) of the second reverser (13) constitute the circulation channel.

4. The torque-transferring linear motion structure according to claim 3, wherein The first reverser (12) and the second reverser (13) have a reverse hole (131) and a reverse body part (132), the reverse hole (131) is arranged at the center position of the reverse body part (132), and the reverse body part (132) has a side surface (133); The reverse raceway (121) has a first port (122) and a second port (123), the first port (122) is arranged on the reverse hole (131), and the second port (123) is arranged on the side surface (133); The first port (122) is in communication with the accommodation channel (16), and the second port (123) is in communication with the body channel (111).

5. The torque transmissible linear motion structure according to claim 1, characterized by, A plurality of groups of the outer raceways (21) are arranged in the axial direction of the mandrel (2), and a plurality of groups of the inner raceways (151) are arranged in the axial direction of the hollow structure (15).

6. The torque transmissible linear motion structure according to claim 1, characterized by, Both the inner raceway (151) and the outer raceway (21) are semicircular raceway structures.

7. The torque-transmissible linear motion structure according to claim 6, characterized by, The inner raceway (151) and the outer raceway (21) are arranged in cooperation to form a circular raceway structure, and the circular raceway structure is the accommodation channel (16).

8. The torque transmissible linear motion structure according to claim 2, characterized by, The edge position of the mounting groove (112) is provided with a positioning groove hole (1121), and the first reverser (12) and the second reverser (13) are arranged in the positioning groove hole (1121) through a positioning pin (17).

9. The torque-transmissible linear motion structure according to claim 8, characterized by, The number of the positioning groove hole (1121) and the positioning pin (17) is three groups.

10. The torque-transmissible linear motion structure according to claim 9, characterized by, The three groups of positioning groove holes (1121) are uniformly arranged in the circumferential direction.

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