CN212250890U - A sprag clutch - Google Patents

Abstract

The utility model discloses a wedge block type clutch, which comprises an inner ring and an outer ring. A control sleeve, an inner ring, an outer ring and a wedge block arranged between the inner ring and the outer ring are symmetrically arranged at both ends of the clutch, respectively. Cage and wedge, the outer ring is provided with convex-shaped notches at both ends to form a separation cavity, the inner ring is provided with a first limit block and a wedge hole, and the outer ring is provided with a second limit block and a wedge hole , the inner side of the control sleeve is provided with an inverted trapezoidal separation block. The first and second limit blocks are installed in the separation cavity. The separation block is sandwiched between the first and second limit blocks. The springs are respectively arranged between the second limit blocks; when the separation block axially penetrates into the space between the first limit block and the second limit block, the first limit block and the second limit block move away from each other so that the The wedge is disengaged from the inner ring and/or the outer ring, and the one-way transmission function is turned off. The utility model can control the opening and closing of one-way and two-way transmission functions, and has good running stability.

Description

A sprag clutch

technical field

The utility model relates to the technical field of clutches, in particular to a wedge-type clutch.

Background technique

The one-way clutch has two movement modes: first, torque transmission or engagement; second, idling or overrun, its function is that when the power source drives the passive element, it can only rotate in one direction, if the power source changes direction, such as clockwise If it becomes counterclockwise, it will automatically disengage without any power transmission function; or when the power output part of the one-way clutch rotates faster than the power source, the clutch is in a disengaged state, and there is no linkage between the inner and outer rings. One-way overrun function of the directional clutch.

At present, the commonly used one-way clutches can be divided into two types: roller type one-way clutches and sprag type clutches. Wherein, the wedge type clutch usually includes a plurality of wedges, an outer ring and an inner ring arranged coaxially; a gap is arranged between the inner circumference of the outer ring and the outer circumference of the inner ring in the radial direction, and the wedges are arranged in the gap One end of the wedge is hinged with the inner ring, and the other end is a free end that can rotate around the hinge shaft; the inner circumference of the outer ring is provided with a slot that engages with the free end of the wedge; along the circumferential direction of the outer ring , one end of the card slot is the dead end, the shape is satisfied to lock the free end of the wedge block, so as to limit the swing of the wedge block and ensure the follow-up of the outer ring and the inner ring, the other end of the card groove is the cam end, and the shape satisfies the Force the free end of the wedge block to swing to the inner ring side, so as to separate the outer ring from the inner ring; a retaining spring is arranged between the inner ring and the wedge block, and the retaining spring pushes the free end of the wedge block into the groove of the outer ring , so as to ensure that the free end of the wedge is always in close contact with the inner peripheral surface of the outer ring.

However, the above-mentioned wedge-type clutch cannot control the opening and closing of the one-way rotation function, and usually can only transmit in a certain direction (such as clockwise or counterclockwise), and cannot artificially select the direction of transmission, or realize two-way transmission. transmission. There are still some limitations in practical applications.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a wedge-type clutch with multiple transmission control modes in order to solve the deficiencies of the prior art.

The utility model adopts the following technical solutions to achieve the above purpose:

A wedge-type clutch, comprising an inner ring, an outer ring, and a wedge-ring control assembly, characterized in that a control sleeve and the wedge-ring control assembly are symmetrically arranged at both ends of the clutch, and the wedge-ring control assembly It includes an inner ring, an outer ring, a wedge block holder arranged between the inner ring and the outer ring, and several groups of wedge blocks. The two ends of the outer ring are provided with convex-shaped gaps to form a separation cavity, and the inner ring is provided with a first limit block and a wedge block hole, the outer ring is provided with a second limit block and a wedge block hole, an inverted trapezoidal separation block is arranged inside the control sleeve, the first limit block and the second limit block are provided The block is installed in the separation cavity, the separation block is sandwiched between the first and second limit blocks, and springs are respectively arranged between the two side walls of the separation cavity and the first limit block and the second limit block; When the block axially penetrates into the space between the first limit block and the second limit block, the first limit block and the second limit block move away from each other, so that the wedge block is separated from the inner ring and/or the outer ring, The one-way drive function is turned off.

The inner circumference of the inner ring is axially sleeved with the inner ring, the outer circumference of the outer ring is axially arranged with the outer ring, and one end of the wedge block passes through the wedge block hole of the inner ring and the inner ring. The other end of the wedge block is in contact with the inner peripheral wall of the outer ring through the wedge block hole of the outer ring, so as to realize the one-way transmission function between the inner ring and the outer ring on one side of the clutch.

The end of the outer ring has a connecting wall extending in the axial direction, the connecting wall is formed with several groups of the separation cavities, and the outer peripheral wall of the connecting wall is also provided with several groups of positioning chute; The inner peripheral wall is also provided with several groups of guide sliders, and the guide sliders are slidably connected with the positioning chute.

One side corresponding to the first limit block and the separation block is provided with a mutually matching inclined surface, and the other side of the first limit block is elastically connected to the separation cavity through a spring; the second limit block is elastically connected to the separation cavity. One side of the block corresponding to the separating block is provided with mutually matched inclined surfaces, and the other side of the second limiting block is elastically connected with the separating cavity through a spring.

The beneficial effects that the utility model can achieve by adopting the above-mentioned technical solutions are:

1. The utility model symmetrically arranges two sets of control sleeves and wedge ring control assemblies on both sides of the clutch. The wedge ring control assembly is composed of a wedge retainer, an inner ring and an outer ring, and the wedge ring is controlled by the two control sleeves. Whether the components interfere or not, realize various control methods such as non-transmission between the inner and outer rings, clockwise/counterclockwise one-way transmission, clockwise and counterclockwise two-way transmission, etc., which are more widely used.

2. For the unilateral control sleeve of the clutch, the utility model is provided with a first limit block on the inner ring and a second limit block on the outer ring to cooperate to form a separate control position. When the control sleeve moves in the axial direction , when the separation block on it is connected to the separation control position, due to the inclined plane of contact, a thrust in the opposite direction is formed on the first limit block and the second limit block, so that the inner ring and the outer ring rotate relative to each other, and the wedge The block is separated from the inner ring and the outer ring, and the one-way transmission function is closed; when the separation block exits the separation control position, the inner ring and the outer ring are reset under the action of the spring, and the one-way transmission function is turned on, that is, the controllable single ring is realized. To turn the function on and off.

Description of drawings

FIG. 1 is an exploded view of the wedge-type clutch of the present invention.

FIG. 2 is an exploded view of the sprag ring control assembly of the sprag clutch of the present invention.

FIG. 3 is a schematic view of the appearance of the wedge-type clutch of the present invention.

Figure 4 is a schematic structural diagram of the control sleeve and the left side of the outer ring.

5 is a schematic structural diagram of the inner ring and the outer ring of the wedge ring control assembly of the present invention.

FIG. 6 is an end view of the assembly relationship on the left side of the sprag clutch.

FIG. 7 is a schematic diagram of the state where the one-way transmission on the left side of the wedge-type clutch of the present invention is opened.

FIG. 8 is a cross-sectional view taken along the line A-A in FIG. 7 .

9 is a schematic diagram of the state of the control sleeve and the inner and outer rings when the one-way transmission on the left side of the wedge-type clutch of the present invention is closed.

10 is a schematic diagram of the state of the wedge block with the one-way transmission on the left side of the wedge block clutch of the present utility model closed.

Description of reference numerals: 1. Control sleeve, 20, Wedge ring control assembly, 1-1, Separating block, 1-2, Guide slider, 2. Inner ring, 2-1, First annular connecting portion, 2 -2, the first limit block, 2-3, the first spring, 2-4, the first wedge block limit hole, 3, the outer ring, 3-1, the second annular connecting part, 3-2, the first Second limit block, 3-3, Second spring, 3-4, Second wedge limit hole, 4, Wedge retainer, 4-1, Wedge, 5, Inner ring, 6, Outer ring, 6 -1. Connecting wall, 6-2. Separating cavity, 6-3. Positioning chute.

Detailed ways

The technical solution will be described in detail below with reference to specific embodiments.

As shown in Figures 1-10, the present utility model is a wedge-type clutch, comprising a control sleeve 1, a wedge-ring control assembly 20, an inner ring 5, and an outer ring 6, wherein the wedge-ring control assembly 20 includes an inner ring 2. The outer ring 3, the wedge block holder 4 and several groups of wedge blocks 4-1 arranged between the inner ring 2 and the outer ring 3. The inner ring 5 is arranged inside the outer ring 6 , and a set of control sleeves 1 and wedge ring control assemblies are arranged at both ends of the inner and outer rings, as shown in FIG. 1 . The inner ring 5 is axially sleeved on the inner circumference of the inner ring 2 at both ends, the outer ring 6 is axially provided on the outer circumference of the outer ring 3 at both ends, and the wedge block 4-1 is arranged in the wedge block holder 4, One end of the wedge 4 - 1 is in contact with the outer peripheral wall of the inner ring 5 , and the other end is in contact with the inner peripheral wall of the outer ring 6 .

The end of the inner ring 2 is provided with a first annular connecting portion 2-1, and along the outer peripheral wall of the first annular connecting portion 2-1 are disposed several groups of first limiting blocks 2-2. The end of the outer ring 3 is provided with a second annular connecting portion 3-1, and along the outer peripheral wall of the second annular connecting portion 3-1, several groups of second limiting blocks 3-2 are arranged. A limit block 2-2 cooperates with the second limit block 3-2 to form a separate control position in the space between the two. A control sleeve 1 is axially arranged on the outer circumference of the outer ring 3, so The inner peripheral wall of the control sleeve 1 is provided with several groups of separation blocks 1-1 corresponding to the separation control positions, the control sleeve 1 can move in the axial direction, and the separation blocks 1-1 on it are connected to the separation control positions, When the control sleeve 1 moves in the axial direction, the inner ring 2 and the outer ring 3 rotate relative to each other, the wedge blocks are separated from the inner ring and the outer ring, and the one-way transmission function is closed.

More specifically, as shown in FIGS. 3-4 , the end of the outer ring 6 has a connecting wall 6-1 extending in the axial direction, and several groups are formed on the connecting wall 6-1 for accommodating the first A limit block 2-2 and the separation cavity 6-2 of the second limit block 3-2, and the outer peripheral wall of the connecting wall 6-1 is also provided with several groups of positioning chute 6-3.

More specifically, the inner peripheral wall of the control sleeve 1 is also provided with several groups of guide sliders 1-2, and the guide sliders 1-2 are slidably connected with the positioning chute 6-3, that is, the control sleeve 1 can slide along the The connecting wall 6-1 on the outer ring 6 moves axially.

More specifically, the separation block 1-1 is in the shape of a trapezoid, a side corresponding to the first limit block 2-2 and the separation block 1-1 is provided with an inclined surface that cooperates with each other, and the first limit block The other side of 2-2 is elastically connected with the separation cavity 6-2 through the first spring 2-3; The other side of the second limiting block 3-2 is elastically connected with the separating cavity 6-2 through the second spring 3-3.

More specifically, the middle part of the wedge block 4-1 is hinged with the wedge block holder 4, and both ends of the wedge block 4-1 can rotate around the wedge block holder 4.

More specifically, the inner ring 2 is provided with several groups of first wedge block limit holes 2-4, and the outer ring 3 is provided with several groups of second wedge block limit holes 3-4. One end of 4-1 is in contact with the inner ring 5 through the first wedge block limit hole 2-4, and the other end of the wedge block 4-1 passes through the second wedge block limit hole 3-4 contact with the outer ring 6 .

More specifically, two ends of the wedge block 4-1 are correspondingly provided with interlocking areas, and one side of the interlocking area is a dead end, and the shape is sufficient to lock the wedge blocks to ensure that the inner ring 5 is locked. Following the movement of the outer ring 6 , the other end of the interlocking region is a free end, and the shape is sufficient to force the wedge block to rotate to ensure the separation of the inner ring 5 and the outer ring 6 .

In this embodiment, the utility model has two working states of one-way transmission function, closed and open. When one side of the wedge-type clutch is in the one-way transmission state, we define the control sleeve, inner and outer rings shown in Figure 4-6. It is the control sleeve and inner and outer rings on the left side of the sprag clutch, that is, the upper control sleeve and the inner and outer rings in the exploded view shown in FIG. 1 (refer to the sprag ring control assembly 20). As shown in Figures 7-8, the separation block 1-1 on the control sleeve on the left side of the sprag clutch does not contact the separation control position, and the first limit block 2-2 is under the action of the first spring 2-3 , rotate the inner ring 2 clockwise by a certain angle, and press the dead end of the wedge 4-1 against the inner ring 5. Similarly, under the action of the second spring 3-3, the second limit block 3-2 makes the outer The ring 3 is rotated counterclockwise by a certain angle, and the dead end of the wedge 4-1 is pressed against the outer ring 6, that is, the wedge 4-1 is rotated counterclockwise to contact the inner ring 5 and the outer ring 6 respectively. When the inner ring rotates clockwise When the inner ring rotates counterclockwise, the free end of the wedge 4-1 is separated from the inner ring and the outer ring, and no power transmission occurs. As shown in Figure 9-10, the left side of the wedge-type clutch is in the state of one-way transmission closed, the control sleeve 1 is forcibly connected to the control state, and the control sleeve 1 moves to the right along the connecting wall 6-1 of the outer ring 6 to control the The separation block 1-1 on the sleeve is connected to the separation control position. Since the contact surface is an inclined plane, the first limit block and the second limit block form a thrust in the opposite direction, wherein pushing the first limit block makes the inner ring 2 Rotate a certain angle counterclockwise, the free end of the wedge 4-1 corresponds to the inner ring 5, and similarly push the second limit block to make the outer ring 3 rotate clockwise by a certain angle, the free end of the wedge 4-1 and the outer ring 6 corresponds, that is, the wedge 4-1 rotates clockwise to separate from the inner ring 5 and the outer ring 6, respectively. At this time, the power cannot be transmitted and is in a separated state. Only when the control sleeve 1 moves to the left, so that the separation block is separated from the separation control position, the one-way transmission function can be turned on. That is, by controlling the control sleeve on the left side of the wedge-type clutch, two outputs can be realized: 1) The control sleeve is connected to the separation control position, and the inner and outer rings are forcibly controlled not to drive; 2) The inner ring rotates clockwise to drive the outer ring to rotate and the inner ring to rotate. The ring rotates counterclockwise without transmission.

Similarly, when the separation block 1-1 on the control sleeve on the right side of the control wedge-type clutch does not contact the separation control position, that is, the wedge 4-1 rotates clockwise and contacts the inner ring 5 and the outer ring 6 respectively. When the inner ring rotates counterclockwise, the power transmission of the inner ring driving the outer ring can be realized; when the inner ring rotates clockwise, the free end of the wedge 4-1 is separated from the inner ring and the outer ring, and no power transmission occurs. . When the separation block 1-1 on the control sleeve is connected to the separation control position, the inner and outer rings are forcibly controlled to not drive. Therefore, by controlling the control sleeve on the right side of the wedge-type clutch, two outputs can be realized: 1) the control sleeve is connected to the separation control position, and the inner and outer rings are forcibly controlled not to drive; 2) the inner ring rotates counterclockwise to drive the outer ring to rotate and the inner ring to rotate. Clockwise rotation of the ring does not drive.

Therefore, by controlling the access state of the left and right control sleeves of the sprag clutch, it can achieve:

1) The left control sleeve is connected to the separation control position, and the right control sleeve is withdrawn from the separation control position: the inner ring rotates counterclockwise to drive the outer ring to rotate.

2) The left control sleeve exits the separation control position, and the right control sleeve is connected to the separation control position: the inner ring rotates clockwise to drive the outer ring to rotate.

3) Both the left and right control sleeves exit the separation control position: clockwise and counterclockwise rotation of the inner ring can drive the outer ring to rotate.

4) The left and right control sleeves are connected to the separation control position: the inner ring is separated from the outer ring, and no power transmission occurs.

The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the present utility model, several modifications and improvements can be made. It belongs to the protection scope of the present invention.

Claims (4)

1. A wedge type clutch comprises an inner ring, an outer ring and a wedge ring control assembly, and is characterized in that control sleeves and the wedge ring control assembly are symmetrically arranged at two ends of the clutch respectively, the wedge ring control assembly comprises an inner ring, an outer ring, a wedge retainer and a plurality of groups of wedges, the wedge retainer and the groups of wedges are arranged between the inner ring and the outer ring, convex notches are arranged at two ends of the outer ring to form a separation cavity, a first limiting block and a wedge hole are arranged on the inner ring, a second limiting block and a wedge hole are arranged on the outer ring, an inverted trapezoidal separation block is arranged at the inner side of the control sleeve, the first limiting block and the second limiting block are installed in the separation cavity, the separation block is clamped between the first limiting block and the second limiting block, and springs are arranged between two side walls of the separation cavity and the first limiting block and the second limiting; when the separating block axially extends into a space between the first limiting block and the second limiting block, the first limiting block and the second limiting block deviate from each other to move so that the wedge block is separated from the inner ring and/or the outer ring, and the one-way transmission function is closed.

2. The wedge clutch according to claim 1, wherein the inner ring is axially sleeved on an inner circumference of the inner ring, the outer ring is axially arranged on an outer circumference of the outer ring, one end of the wedge passes through a wedge hole of the inner ring and abuts against an outer circumferential wall of the inner ring, and the other end of the wedge passes through a wedge hole of the outer ring and abuts against an inner circumferential wall of the outer ring, so that a one-way transmission function between the inner ring and the outer ring on one side of the clutch is realized.

3. The wedge clutch of claim 2, wherein a connecting wall extends axially from the end of the outer race, the connecting wall having a plurality of sets of said separation cavities formed therein, the connecting wall further having a plurality of sets of positioning grooves formed in an outer peripheral wall thereof; the internal perisporium of control cover still is provided with a plurality of groups direction slider, the direction slider with location spout sliding connection.

4. The wedge type clutch according to claim 3, wherein a slope surface is provided on one side of the first stopper corresponding to the separation block, and the other side of the first stopper is elastically connected to the separation chamber through a spring; one side that the second stopper with the separation piece corresponds is provided with the inclined plane of mutually supporting, the opposite side of second stopper pass through the spring with separation chamber elastic connection.

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