CN219372169U - Motor aligning tool of steering gear - Google Patents

Abstract

The utility model discloses a motor aligning tool of a steering gear, which comprises the following components: the aligning mounting frame is used for being connected with a shell of the steering gear; the aligning block is movably arranged on the aligning mounting frame and is adjustable in distance relative to the shell, the aligning block is connected with an aligning belt, and the aligning belt is suitable for being sleeved outside a motor of the steering gear. According to the motor aligning tool of the steering gear, the aligning block can slide on the aligning mounting frame, and meanwhile, the motor is sleeved and connected with the aligning block through the aligning belt, so that the aligning block can drive the motor to move in the moving process, the change of the axis position of the motor is further realized, and the purpose of aligning is achieved. Wherein, aligning piece and motor are stable rectilinear movement, can reduce the error probability that artificially causes, guarantee the aligning precision.

Description

Motor aligning tool of steering gear

Technical Field

The utility model relates to the technical field of steering systems, in particular to a motor aligning tool of a steering gear.

Background

The R-EPS steering gear is a speed reducing mechanism formed by large and small belt wheels and belts, so that the purposes of increasing torque and providing assistance are achieved, the accurate control of the center distance of the large and small belt wheels is particularly critical, the steering gear in the prior art is complex in structure and insufficient in aligning capability, the later maintenance cost is high, and gaps exist among internal action structures. Further, there is a problem of insufficient accuracy in steering control and production, and therefore there is room for improvement.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the motor aligning tool for the steering gear, which utilizes the tool for aligning, reduces the probability of human error and ensures the aligning precision.

According to the embodiment of the utility model, the motor aligning tool of the steering gear comprises: the aligning mounting frame is used for being connected with a shell of the steering gear; the aligning block is movably arranged on the aligning mounting frame and is adjustable in distance relative to the shell, the aligning block is connected with an aligning belt, and the aligning belt is suitable for being sleeved outside a motor of the steering gear.

According to the motor aligning tool of the steering gear, the aligning block can slide on the aligning mounting frame, and meanwhile, the motor is sleeved and connected with the aligning block through the aligning belt, so that the aligning block can drive the motor to move in the moving process, the change of the axis position of the motor is further realized, the aim of aligning is achieved, the error probability caused by people is reduced, and the aligning precision is guaranteed.

According to the motor aligning tool of the steering gear, the aligning mounting frame comprises a supporting plate and two supporting blocks, the supporting plate is used for being connected with the shell, the two supporting blocks are mounted on the supporting plate at intervals, and two sides of the aligning block are slidably mounted on the two supporting blocks.

According to the motor aligning tool of the steering gear, the aligning mounting frame further comprises a pressing plate, two ends of the pressing plate are respectively connected with the two supporting blocks, and the pressing plate is provided with an adjusting piece which is used for driving the aligning blocks to slide.

According to the motor aligning tool of the steering gear, the supporting plate is detachably connected with the supporting block, and/or the pressing plate is detachably connected with the supporting block.

According to the motor aligning tool of the steering gear, the adjusting piece is rotatably arranged on the pressing plate in a penetrating mode, and the adjusting piece is in threaded fit with the aligning block.

According to the motor aligning tool of the steering gear, the sliding direction of the aligning block is perpendicular to the axis of the motor.

According to the motor aligning tool of the steering gear, the side faces of the two supporting blocks facing each other are respectively provided with the sliding grooves, the sliding parts are formed on the two sides of the aligning block, and the sliding parts extend into the sliding grooves to be in sliding fit with the supporting blocks.

According to the motor aligning tool of the steering gear, the supporting plate is provided with the avoidance space, and the avoidance space is used for avoiding the shell and/or the motor.

According to the motor aligning tool of the steering gear, the aligning block is arranged on the aligning column, one part of the aligning belt is sleeved outside the aligning column, the other part of the aligning belt is sleeved outside the motor, and the axis of the aligning column is parallel to the axis of the motor in a spaced mode.

According to the motor aligning tool of the steering gear, the aligning mounting frame is provided with the connecting hole, and the connecting hole is used for penetrating the connecting piece connected with the shell.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a diagram of the installation effect of a motor aligning tool, a steering gear shell and a motor of a steering gear according to an embodiment of the utility model;

fig. 2 is a schematic structural view of a motor aligning tool of a steering gear according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a motor aligning tool (another view angle) of a steering gear according to an embodiment of the present utility model;

fig. 4 is a structural exploded view of a motor aligning tool of a steering gear according to an embodiment of the present utility model.

Reference numerals:

the motor aligning tool 100 of the steering gear,

the aligning mounting frame 1, the supporting plate 11, the first connection hole 111, the fifth connection hole 112, the supporting block 12, the second connection hole 121, the third connection hole 122, the sliding groove 123, the pressing plate 13, the regulating member 131, the pressing portion 132, the limiting portion 133, the fourth connection hole 134, the limiting hole 135,

the aligning block 2, the aligning column 21, the adjusting hole 22,

the aligning belt 3, the first connecting piece 4, the second connecting piece 5, the connecting piece 6,

housing 200, motor 300, evasion space a.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

If not specified, the front-rear direction in the present application is the longitudinal direction of the aligning mounting frame 1, i.e., the X-direction; the left-right direction is the transverse direction of the aligning mounting frame 1, namely the Y direction; the vertical direction is the vertical direction of the aligning mounting frame 1, namely the Z direction.

A motor centering fixture 100 of a steering gear according to an embodiment of the present utility model is described below with reference to fig. 1 to 4, including: a aligning mounting frame 1 and an aligning block 2. As shown in fig. 2, the center-adjusting mount 1 is configured as a U-shaped flat structure as a whole. In actual installation, the side surface of the aligning and mounting frame 1 is attached to the steering gear housing 200, and the stability of the connection effect is ensured. The U-shaped structure constructed by the aligning mounting frame 1 can meet the requirement of connection strength, meanwhile, the structure still avoids occupying redundant mounting space, the middle part of the aligning mounting frame 1 is of a hollow structure, the weight of the aligning mounting frame 1 can be reduced, and the lightweight design of the steering gear can be improved.

And, the aligning block 2 is movably installed on the aligning installation frame 1 and has an adjustable distance relative to the shell 200, the aligning block 2 is connected with an aligning belt 3, and the aligning belt 3 is suitable for being sleeved outside the motor 300 of the steering gear. That is, the aligning block 2 is of a movable structure, and the aligning mounting frame 1 is provided with a movable space for providing the aligning block 2 with movement, so that the aligning block 2 can move after being mounted on the aligning mounting frame 1, the distance between the aligning block 2 and the housing 200 changes, the aligning belt 3 is driven by the aligning block 2, the motor 300 is driven by the aligning belt 3 to accurately control the center distance of the aligning belt 3, and the aligning process is completed.

Wherein, the aligning block 2 slides along the Z direction of the aligning mounting frame 1 during movement, and the aligning belt 3 is connected with the aligning block 2, namely, the moving direction of the aligning belt 3 and the aligning block 2 is consistent.

The specific installation process is as follows: the aligning block 2 is arranged on the aligning and mounting frame 1, the aligning and mounting frame 1 is fixedly connected with the shell 200 of the steering gear, and finally, two ends of the aligning belt 3 are respectively sleeved and connected with the aligning block 2 and the motor 300 of the steering gear. Therefore, when in operation, the aligning block 2 moves along the moving space in the aligning mounting frame 1 in the Z direction, and the aligning belt 3 drives the motor 300 to move along with the movement of the aligning block 2. When the motor 300 moves, the position of the axis of the motor 300 relative to the housing 200 changes, i.e. the position of the axis of the motor 300 in space changes, so as to finish accurate aligning of the motor 300.

According to the motor aligning tool 100 of the steering gear, the aligning block 2 is arranged to slide on the aligning mounting frame 1, and meanwhile, the motor 300 is sleeved and connected with the aligning block 2 through the aligning belt 3, so that the aligning block 2 can drive the motor 300 to move in the moving process, the change of the axis position of the motor is further realized, the aim of aligning is achieved, the error probability caused by human factors is reduced, and the aligning precision is guaranteed.

In some embodiments, the aligning and mounting frame 1 includes a support plate 11 and two support blocks 12, the support plate 11 is used for being connected with the housing 200, the two support blocks 12 are mounted on the support plate 11 at intervals, and two sides of the aligning block 2 are slidably mounted on the two support blocks 12. As shown in fig. 3, the support plate 11 is configured as a U-shaped plate structure, the two support blocks 12 are each configured as an L-shaped rod structure, the aligning block 2 is configured as a T-shaped structure, and the length of the aligning block 2 along the X-direction is the same as the distance between the two arms of the support plate 11. In actual installation, the bottom of the support plate 11 is fixedly connected with the housing 200, two support blocks 12 are respectively installed at the two arm ends of the support plate 11, and the X-direction two ends of the aligning block 2 are respectively slidably installed in the two support blocks 12.

Therefore, the aligning block 2 can slide in the Z direction relative to the aligning mounting frame 1, and the stable linear motion of the aligning block 2 in the motion process can be ensured through the limiting function of the supporting block 12, so that the axis of the aligning block 2 is not deviated, the axis of the motor 300 is not deviated in the motion process, and the aligning precision is improved.

In some embodiments, the aligning and mounting frame 1 further includes a pressing plate 13, two ends of the pressing plate 13 are respectively connected to the two supporting blocks 12, the pressing plate 13 is provided with an adjusting member 131, and the adjusting member 131 is used for driving the aligning block 2 to slide.

As shown in fig. 2, the pressing plate 13 is provided with a pressing portion 132 and a limiting portion 133, where the pressing portion 132 and the limiting portion 133 are each configured as a strip-shaped plate structure, the pressing portion 132 may abut against the end portions of the two support blocks 12, and the limiting portion 133 may abut against the inner sides of the two arms of the support plate 11. Wherein, still be provided with regulating part 131 on clamp plate 13, regulating part 131 wears to establish clamp plate 13 and makes the one end of regulating part 131 be connected with aligning piece 2. Thus, when the adjusting member 131 moves up and down relative to the pressing plate 13, the adjusting member 131 can drive the aligning block 2 to slide up and down.

That is, the pressing plate 13 is fixedly connected with the supporting block 12 and the supporting plate 11 respectively to ensure that the connecting piece connected with the pressing plate 13 can stably move, and the connecting piece is connected with the aligning block 2, so that a driving force can be provided for the connecting piece, a fixing effect can be provided for the aligning block 2, and the aligning block 2 can be caused to stably slide.

In some embodiments, the support plate 11 is removably coupled to the support block 12 and/or the pressure plate 13 is removably coupled to the support block 12. It should be noted that, as shown in fig. 4, three first connection holes 111 penetrating the support plate 11 are respectively provided on two arms of the support plate 11, and similarly, three second connection holes 121 are provided at the same position where the support block 12 is attached to the support plate 11, so that the first connection holes 111 and the second connection holes 121 are opposite to each other in the Y direction, and the aperture sizes of the first connection holes 111 and the second connection holes 121 are the same.

And, each supporting block 12 is further provided with two third connecting holes 122 at the top, and two fourth connecting holes 134 penetrating through the pressing plate 13 are respectively arranged at positions where two ends of the pressing plate 13 are propped against the two supporting blocks 12, so that the third connecting holes 122 and the fourth connecting holes 134 are opposite to each other in the Z direction, and the aperture sizes of the third connecting holes 122 and the fourth connecting holes 134 are the same.

Therefore, in actual installation, the first connecting piece 4 matched with the first connecting hole 111 and the second connecting hole 121 is sequentially inserted into the first connecting hole 111 and the second connecting hole 121 from the side of the supporting plate 11 away from the aligning block 2, so that the first connecting piece 4 is matched with the first connecting hole 111 and the second connecting hole 121, and the fixing effect is achieved. And, the second connecting piece 5 matched with the second connecting hole 121 and the third connecting hole 122 is sequentially inserted into the third connecting hole 122 and the fourth connecting hole 134 from one side of the pressing plate 13 away from the aligning block 2, so that the second connecting piece 5 is matched with the third connecting hole 122 and the fourth connecting hole 134, and the fixing effect is achieved.

It can be appreciated that the first connecting hole 111, the second connecting hole 121, the third connecting hole 122 and the fourth connecting hole 134 may be configured as threaded holes, while the first connecting piece 4 and the second connecting piece 5 may be configured as threaded rods, and the supporting plate 11 and the supporting block 12, the pressing plate 13 and the supporting block 12 may be detachably connected through the threaded fit of the threaded rods and the threaded holes, so that the assembly of the whole aligning installation frame 1 and the replacement and maintenance of later parts are facilitated, and the process is simple and easy to operate.

In some embodiments, the adjusting member 131 is rotatably disposed through the pressing plate 13, and the adjusting member 131 is in threaded engagement with the centering block 2. It should be noted that, as shown in fig. 4, the pressing plate 13 is provided with a limiting hole 135, the adjusting member 131 may be made of a half-tooth screw, and the size of the limiting hole 135 is guaranteed to be the same as that of the screw, so that the limiting hole 135 is adapted to the adjusting member 131 to perform the function of limiting and fixing, and the adjusting member 131 is guaranteed to penetrate through the pressing plate 13 to ensure the normal operation of the adjusting member 131. Specifically, the adjusting block is also provided with an adjusting hole 22 with the same size as the limiting hole 135 at a position abutting against the adjusting member 131, and the adjusting hole 22 is a threaded hole.

Therefore, the adjusting piece 131 sequentially passes through the limiting hole 135 and the adjusting hole 22, so that the threaded fit of the adjusting piece 131 and the aligning block 2 is realized, and the fixed connection of the adjusting piece 131 and the aligning block 2 is ensured by the extrusion force generated by the threaded fit. When the height of the aligning block 2 needs to be adjusted, the adjusting piece 131 is rotated to change the length of the adjusting piece 131 extending into the adjusting hole 22, namely, the height of the aligning block 2 relative to the pressing plate 13 is changed to change the position of the aligning block 2, the aligning belt 3 is driven by the aligning block 2, the motor 300 is driven by the aligning belt 3, and finally the aligning purpose is achieved.

In some embodiments, the sliding direction of the centering block 2 is perpendicular to the axis of the motor 300. It should be noted that, as shown in fig. 2, the adjusting member 131 sequentially passes through the limiting hole 135 and the adjusting hole 22 opposite to each other in the Z direction, and the degree of freedom of the adjusting member 131 is reduced by the fixing effect of the limiting hole 135 and the adjusting hole 22, so that the adjusting member 131 can only maintain the linear motion in the Z direction.

Specifically, the aligning block 2 is connected to the adjusting member 131 such that the movement path of the aligning block 2 remains the same as that of the adjusting member 131 and is linear movement in the Z direction. And, the motor 300 is perpendicular to the aligning mounting frame 1 at the time of mounting such that the axis of the motor 300 is perpendicular to the aligning mounting frame 1, i.e., the axis of the motor 300 is parallel to the Y axis.

It will be appreciated that the aligning block 2 moves linearly in the Z direction, while the axis of the motor 300 parallel to the Y axis is at a right angle to the path of movement of the aligning block 2. Therefore, when the motor 300 moves along the Z direction along with the aligning block 2, the axis of the motor 300 is always parallel to the Y axis, so that the feasibility of aligning through the axis of the motor 300 is reflected, and the axis of the motor 300 is stable and reliable in the process, so that the aligning accuracy can be ensured.

In some embodiments, the sides of the two support blocks 12 facing each other are each formed with a sliding groove 123, and the two sides of the aligning block 2 are formed with sliding parts that extend into the sliding grooves 123 to slidably fit the support blocks 12. It should be noted that, as shown in fig. 4, the sliding groove 123 is configured as a bar-shaped groove, and the groove width is the same as the width of the sliding portion of the aligning block 2, so as to ensure that the sliding portion can extend into the sliding groove 123 for sliding fit.

It will be appreciated that the two support blocks 12 are configured with the sliding grooves 123 at the same position, so that after the support blocks 12 are assembled with the support plate 11, the sliding grooves 123 of the two support blocks 12 can be kept opposite to each other, and the aligning block 2 can be mounted in the two sliding grooves 123. And, when the aligning block 2 is mounted in the sliding groove 123, the adjusting member 131 may be further connected to the aligning block 2, so that the pulling force applied to the aligning block 2 ensures the fixing of the aligning block 2. Meanwhile, a limiting block can be arranged at the bottom of the sliding groove 123, so that supporting force can be provided for the aligning block 2, and the aligning block 2 is prevented from falling out of the sliding groove 123.

In some embodiments, the support plate 11 is formed with a relief space a for the relief housing 200 and/or the motor 300. That is, as shown in fig. 2, the supporting plate 11 is a U-shaped plate, and the two arms of the supporting plate 11 are hollow to form an avoidance space a, where the width of the avoidance space a is the distance between the two arms of the supporting plate 11, and the length is the distance from the bottom of the pressing plate 13 to the bottom of the supporting plate 11.

In actual installation, the housing 200 or the motor 300 is disposed below the aligning block 2, and the housing 200 is fixed to the bottom of the supporting plate 11, and the motor 300 is connected to the aligning block 2 only through the aligning belt 3. Therefore, after the motor 300 is mounted on the aligning mounting frame 1, an avoidance space A can be provided for shaking of the motor 300 during mounting, so that the motor 300 does not interfere with the structures such as the supporting plate 11 or the supporting block 12, the motor 300 is protected, shaking of the motor 300 in the moving process is weakened, and stability is improved.

Meanwhile, the avoidance space A is provided to satisfy the Y-direction movement of the motor 300. That is, the position of the motor 300 is opposite to the avoiding space A, and the position of the motor 300 sleeved on the motor 300 can be adjusted by adjusting the aligning belt 3, so that the position of the motor 300 relative to the aligning mounting frame 1 is changed, and the aim of accurate aligning is achieved.

In some embodiments, the centering block 2 is provided with a centering post 21, a portion of the centering belt 3 is sleeved outside the centering post 21 and another portion is sleeved outside the motor 300, and the axis of the centering post 21 is spaced apart from the axis of the motor 300 in parallel. It should be noted that, as shown in fig. 2, the aligning column 21 is disposed on the aligning block 2 and protrudes horizontally at a side close to the motor 300, that is, the axis of the aligning column 21 may be disposed parallel to the Y axis.

And, the aligning belt 3 is constructed in a drop-shaped structure, that is, both ends of the aligning belt 3 can form circles having different radii. The aligning belt 3 is sleeved at one end of the aligning column 21 and has the same diameter as the aligning column 21, and sleeved at one end of the motor 300 and has the same diameter as the motor 300. The connection is established through the matched sleeve, so that the aligning belt 3 is always kept tight, the stability of connection is improved, and shaking is avoided.

It will be appreciated that when the motor 300 is mounted on the centering rod 21 by the centering belt 3, the axis of the centering rod 21 and the axis of the motor 300 are both parallel to the Y axis, i.e., the axis of the centering rod 21 is parallel to the axis of the motor 300, and both maintain linear motion in the Z direction.

Therefore, the purpose of aligning can be achieved by adjusting the axis of the motor 300, and the accuracy of the aligning process is ensured by utilizing mechanical transmission among parts, so that the probability of errors caused by human beings is reduced.

In some embodiments, the centering mounting frame 1 is provided with connection holes for penetrating the connection pieces 6 connected to the housing 200. That is, as shown in fig. 1 and 4, the support plate 11 of the aligning and mounting frame 1 is provided with three through fifth connection holes 112 at the bottom, and three sixth connection holes are also provided on the housing 200 at positions opposite to the connection holes, and all the connection holes may be provided as screw holes, and the connection member 6 may be provided as a screw. In actual installation, the connecting piece 6 is directly penetrated through the fifth connecting hole 112 and the sixth connecting hole in sequence and is in threaded fit, so that the effect of fixed installation can be achieved.

In practical design, three fifth connecting holes 112 on the aligning and mounting frame 1 are arranged at intervals, that is, two fifth connecting holes 112 on two arms of the supporting plate 11 are opposite to each other, and the fifth connecting holes 112 on the bottom arm are arranged at a central position. Thus, the uniformity of stress when the supporting plate 11 is connected with the housing 200 can be ensured, thereby improving the structural strength and stability.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. Motor aligning frock of steering gear, its characterized in that includes:

the aligning mounting frame is used for being connected with a shell of the steering gear;

the aligning block is movably arranged on the aligning mounting frame and is adjustable in distance relative to the shell, the aligning block is connected with an aligning belt, and the aligning belt is suitable for being sleeved outside a motor of the steering gear.

2. The motor centering tool of a steering gear according to claim 1, wherein the centering mounting frame comprises a support plate and two support blocks, the support plate is used for being connected with the shell, the two support blocks are mounted on the support plate at intervals, and two sides of the centering block are slidably mounted on the two support blocks.

3. The motor aligning tool of a steering gear according to claim 2, wherein the aligning mounting frame further comprises a pressing plate, two ends of the pressing plate are respectively connected with the two supporting blocks, the pressing plate is provided with an adjusting piece, and the adjusting piece is used for driving the aligning blocks to slide.

4. A motor centering fixture for a steering gear according to claim 3, wherein the support plate is detachably connected to the support block, and/or the pressure plate is detachably connected to the support block.

5. The motor centering tool of the steering gear according to claim 3, wherein the adjusting member is rotatably inserted through the pressing plate, and the adjusting member is in threaded engagement with the centering block.

6. The motor centering tool of a steering gear according to claim 2, wherein a sliding direction of the centering block is perpendicular to an axis of the motor.

7. The motor aligning tool of a steering gear according to claim 2, wherein both sides of the supporting blocks facing each other are formed with sliding grooves, both sides of the aligning block are formed with sliding parts, and the sliding parts extend into the sliding grooves to be slidably engaged with the supporting blocks.

8. The motor aligning tool of a steering gear according to claim 2, wherein the support plate is formed with an avoidance space for avoiding the housing and/or the motor.

9. The motor aligning tool of a steering gear according to claim 1, wherein the aligning block is provided with an aligning column, a part of the aligning belt is sleeved outside the aligning column, and the other part of the aligning belt is sleeved outside the motor, and the axis of the aligning column is parallel to and spaced apart from the axis of the motor.

10. The motor aligning tool of a steering gear according to claim 1, wherein the aligning mounting frame is provided with a connecting hole for penetrating a connecting piece connected with the housing.