Axially continuously adjustable sleeve structure and positioning method

Abstract

The application provides a sleeve structure with continuously adjustable axial size and a positioning method, which comprises an outer threaded sleeve, an inner threaded sleeve, a short circumferential wedge-shaped block sleeve, a V-shaped block and a long circumferential wedge-shaped block sleeve; a first wedge-shaped block is arranged on the circumferential side of the short circumferential wedge-shaped block sleeve, a second wedge-shaped block is arranged on the circumferential side of the long circumferential wedge-shaped block sleeve, and the V-shaped block is mounted between the first wedge-shaped block and the second wedge-shaped block; the V-shaped surface of the V-shaped block is respectively abutted on the inclined surfaces of the first wedge-shaped block and the second wedge-shaped block, and the distance between the short circumferential wedge-shaped block sleeve and the long circumferential wedge-shaped block sleeve is realized by adjusting the position of the V-shaped block relative to the inclined surfaces of the first wedge-shaped block and the second wedge-shaped block; and the outer threaded sleeve is connected with the inner threaded sleeve. The axial size of the application can be continuously changed according to specific use requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of axial size positioning devices, in particular to a sleeve structure with continuously adjustable axial size and a positioning method. BACKGROUND

[0002] Axial positioning sleeves are widely used for positioning between two parts on a shaft, with the characteristics of simple structure, reliable positioning, and no influence on the fatigue strength of the shaft. The inner hole surface of the axial positioning sleeve is the limiting base surface, and the two end surfaces are the main limiting surfaces. The distance between the two end surfaces is a certain value, that is, the axial size of the sleeve is a certain value. With the continuous progress of the technology in the field of mechanical assembly, the complexity and flexibility of the assembly system are also increasingly required. In the assembly process, it is often necessary to use positioning sleeves of various axial sizes. Since the axial size of the positioning sleeve is usually fixed, if the distance between the limiting surfaces needs to be adjusted, the sleeve needs to be replaced. Especially during the development stage of mechanical equipment, frequent replacement of the sleeve is very common. In order to avoid such a situation of complicated operation and low efficiency, it is of practical application value to develop a positioning sleeve structure with continuously adjustable axial size.

[0003] Patent document CN111975697A and patent document CN210307549U respectively propose two sleeve structures with variable radial size, but the related technical field pays little attention to sleeve structures with variable axial size. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a sleeve structure with continuously adjustable axial size and a positioning method.

[0005] The sleeve structure with continuously adjustable axial size provided by the present application comprises an external thread sleeve, an internal thread sleeve, a short circumferential wedge block sleeve, a V-shaped block, and a long circumferential wedge block sleeve.

[0006] The short circumferential wedge block sleeve is provided with a first wedge block on the circumferential side, the long circumferential wedge block sleeve is provided with a second wedge block on the circumferential side, and the V-shaped block is installed between the first wedge block and the second wedge block.

[0007] The V-shaped surface of the V-shaped block is respectively abutted on the inclined surface of the first wedge block and the second wedge block, and the distance between the short circumferential wedge block sleeve and the long circumferential wedge block sleeve is realized by adjusting the position of the V-shaped block relative to the inclined surface of the first wedge block and the second wedge block.

[0008] The outer threaded sleeve is connected to the inner threaded sleeve, the outer threaded sleeve is installed on the side of the short circumferential wedge sleeve away from the long circumferential wedge sleeve and is limited by the short circumferential wedge sleeve, and the inner threaded sleeve is installed on the side of the long circumferential wedge sleeve away from the short circumferential wedge sleeve and is limited by the long circumferential wedge sleeve.

[0009] Preferably, the middle part of the short circumferential wedge sleeve is provided as a first sleeve, a plurality of first wedge blocks are extended from the circumferential side of the first sleeve in the diameter direction, and the side of the first wedge block away from the first sleeve is provided as an inclined surface inclined to the side of the second wedge block.

[0010] Preferably, the middle part of the long circumferential wedge sleeve is provided as a second sleeve, a plurality of second wedge blocks are extended from the circumferential side of the second sleeve in the diameter direction, and the side of the second wedge block away from the second sleeve is provided as an inclined surface inclined to the side of the first wedge block.

[0011] Preferably, a plurality of sliding grooves are provided on the circumferential side of one end of the second sleeve, the sliding grooves are in the same straight line as the first wedge blocks or the second wedge blocks in the parallel axis direction and have the same number.

[0012] Preferably, the first wedge blocks and the second wedge blocks have the same number and are one-to-one corresponding in the parallel axis direction, and the inclinations of the inclined surfaces of the first wedge blocks and the second wedge blocks are the same.

[0013] Preferably, a guide hole is provided on the V-shaped block, the V-shaped block is installed on the sliding bolt through the guide hole and fastening nut and is allowed to slide in the axial direction of the sliding bolt;

[0014] The inclination of the V-shaped surface of the V-shaped block is the same as the inclination of the inclined surface of the first wedge block and the second wedge block.

[0015] Preferably, the head of the sliding bolt is installed on the sliding groove and is allowed to slide relative to the sliding groove;

[0016] The V-shaped block realizes axial movement and radial movement relative to the short circumferential wedge sleeve and the long circumferential wedge sleeve through the sliding bolt, and the V-shaped block realizes movement of the V-shaped surface relative to the inclined surface of the first wedge block and the second wedge block through radial movement.

[0017] Preferably, one end of the outer threaded sleeve is provided with a step, the other end is threadedly connected to the inner threaded sleeve after passing through the first sleeve, one end of the inner threaded sleeve is provided with a step, and the other end is threadedly connected to the outer threaded sleeve after passing through the second sleeve;

[0018] The step of the outer threaded sleeve is located on the side of the short circumferential wedge sleeve away from the long circumferential wedge sleeve, the short circumferential wedge sleeve limits the movement of the outer threaded sleeve towards the inner threaded sleeve, the step of the inner threaded sleeve is located on the side of the long circumferential wedge sleeve away from the short circumferential wedge sleeve, and the long circumferential wedge sleeve limits the movement of the inner threaded sleeve towards the outer threaded sleeve.

[0019] Preferably, the outer threaded sleeve and the short circumferential wedge sleeve are clearance fit, and the inner threaded sleeve and the long circumferential wedge sleeve are clearance fit.

[0020] Preferably, a positioning method of the sleeve structure with continuous adjustable axial size comprises the following steps:

[0021] Step S1, determining the basic size of the sleeve structure according to the installation conditions, load conditions and operation environment, and designing and manufacturing each part;

[0022] Step S2, initially assembling each part and checking whether the mutual movement of each part can occur as preset;

[0023] Step S3, determining the target axial size according to the use requirement;

[0024] Step S4, rotating the steps of the outer threaded sleeve and the inner threaded sleeve until the total length of the outer threaded sleeve and the inner threaded sleeve is the target axial size;

[0025] Step S5, adjusting the phase of the short circumferential wedge sleeve and the long circumferential wedge sleeve so that the first wedge and the second wedge are aligned;

[0026] Step S6, locking the fastening nut to generate a pre-tightening force between the V-shaped block and the inclined surface of the first wedge and the second wedge, and then limiting the axial position of the outer threaded sleeve and the inner threaded sleeve by the short circumferential wedge sleeve and the long circumferential wedge sleeve, respectively;

[0027] Step S7, checking whether the axial size of the sleeve structure is consistent with the target axial size by using a measuring tool, and if not, repeating steps S4 to S6 until the axial size of the sleeve structure is consistent with the target axial size;

[0028] Step S8, assembling the debugged sleeve structure to the target position for use as an axial positioning sleeve;

[0029] Step S9, when the target axial size continuously changes, repeating steps S4 to S6 to directly and continuously adjust the axial size of the sleeve structure without disassembly and adjustment.

[0030] Compared with the prior art, the present application has the following beneficial effects:

[0031] 1、The axial dimension of the application can be continuously changed according to specific use requirements;

[0032] 2、The application has simple structure, low cost and is suitable for various assembly conditions;

[0033] 3、The application is convenient to use, the axial dimension can be adjusted on line, and frequent disassembly and installation are not needed;

[0034] 4、The application is safe and reliable, and does not need auxiliary components such as electricity and hydraulic pressure. BRIEF DESCRIPTION OF DRAWINGS

[0035] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the following drawings:

[0036] Figure 1 It is an exploded view of the sleeve structure;

[0037] Figure 2 It is a perspective view of the sleeve structure;

[0038] Figure 3 It is a sectional view of the sleeve structure;

[0039] Figure 4 It is a schematic view of the sleeve end surface of the short circumferential wedge block;

[0040] Figure 5 It is a schematic view of the sleeve end surface of the long circumferential wedge block;

[0041] Figure 6 It is a state (one) of the sleeve structure for axial positioning;

[0042] Figure 7 It is a state (two) of the sleeve structure for axial positioning;

[0043] In the drawings:

[0044] DETAILED DESCRIPTION

[0045] The application will be described in detail below in conjunction with specific examples. The following examples will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0046] Example 1

[0047] As Figures 1 to 3As shown, the embodiment includes an outer threaded sleeve 1, an inner threaded sleeve 5, a short circumferential wedge sleeve 2, a V-shaped block 3, and a long circumferential wedge sleeve 6; the short circumferential wedge sleeve 2 is provided with first wedge blocks on the circumferential side, the long circumferential wedge sleeve 6 is provided with second wedge blocks on the circumferential side, and the V-shaped block 3 is installed between the first wedge blocks and the second wedge blocks; the inclined surfaces on both sides of the V-shaped surface of the V-shaped block 3 abut on the inclined surfaces of the first wedge blocks and the second wedge blocks, respectively, and the distance between the short circumferential wedge sleeve 2 and the long circumferential wedge sleeve 6 is realized by adjusting the position of the V-shaped block 3 relative to the inclined surfaces of the first wedge blocks and the second wedge blocks; the outer threaded sleeve 1 is connected to the inner threaded sleeve 5, one end of the outer threaded sleeve 1 is provided with a step, the other end passes through the first sleeve and is threadedly connected to the inner threaded sleeve 5, one end of the inner threaded sleeve 5 is provided with a step, the other end passes through the second sleeve and is threadedly connected to the outer threaded sleeve 1, the step of the outer threaded sleeve 1 is located on the side of the short circumferential wedge sleeve 2 away from the long circumferential wedge sleeve 6, and the short circumferential wedge sleeve 2 limits the movement of the outer threaded sleeve 1 towards the inner threaded sleeve 5, the step of the inner threaded sleeve 5 is located on the side of the long circumferential wedge sleeve 6 away from the short circumferential wedge sleeve 2, and the long circumferential wedge sleeve 6 limits the movement of the inner threaded sleeve 5 towards the outer threaded sleeve 1. The outer threaded sleeve 1 and the short circumferential wedge sleeve 2 are clearance fit, and the inner threaded sleeve 5 and the long circumferential wedge sleeve 6 are clearance fit. The number of first wedge blocks and second wedge blocks is the same and one-to-one corresponding in the direction of parallel axis, and the inclination of the inclined surfaces of the first wedge blocks and the second wedge blocks is the same.

[0048] In combination Figure 4 and Figure 5 As shown, the middle part of the short circumferential wedge sleeve 2 is provided as a first sleeve, a plurality of first wedge blocks extend out in the diameter direction on the circumferential side of the first sleeve, and the side of the first wedge block away from the first sleeve is provided as an inclined surface inclined to the side of the second wedge block. The middle part of the long circumferential wedge sleeve 6 is provided as a second sleeve, a plurality of second wedge blocks extend out in the diameter direction on the circumferential side of the second sleeve, and the side of the second wedge block away from the second sleeve is provided as an inclined surface inclined to the side of the first wedge block. The circumferential side of one end of the second sleeve towards the short circumferential wedge sleeve 2 is provided with a plurality of sliding grooves, the sliding grooves are in the same straight line as the first wedge blocks or the second wedge blocks in the direction of parallel axis and the number is the same. The V-shaped block 3 is provided with a guide hole, the V-shaped block 3 is installed on the sliding bolt 7 through the guide hole and is allowed to slide in the axial direction of the sliding bolt 7, and the inclination of the V-shaped surface of the V-shaped block 3 is the same as the inclination of the inclined surfaces of the first wedge blocks and the second wedge blocks. The head of the sliding bolt 7 is installed on the sliding groove and is allowed to slide relative to the sliding groove, the V-shaped block 3 realizes the axial movement and the radial movement relative to the short circumferential wedge sleeve 2 and the long circumferential wedge sleeve 6 through the sliding bolt 7, and the V-shaped block 3 realizes the movement of the V-shaped surface relative to the inclined surfaces of the first wedge blocks and the second wedge blocks through the radial movement.

[0049] The positioning method of the embodiment specifically comprises the following steps: step S1, determining the basic size of the sleeve structure according to the installation condition, the load condition and the operation environment, designing and manufacturing each part; step S2, initially assembling each part and checking whether the mutual movement between each part can occur according to the preset; step S3, determining the target axial size according to the use requirement; step S4, rotating the step of the outer threaded sleeve 1 and the inner threaded sleeve 5 until the total length of the outer threaded sleeve 1 and the inner threaded sleeve 5 is the target axial size; step S5, adjusting the phase of the short circumferential wedge block sleeve 2 and the long circumferential wedge block sleeve 6 so that the first wedge block and the second wedge block are aligned; step S6, locking the fastening nut 4 to generate a pre-tightening force between the V-shaped block 3 and the inclined surface of the first wedge block and the second wedge block, and then making the short circumferential wedge block sleeve 2 and the long circumferential wedge block sleeve 6 limit the axial position of the outer threaded sleeve 1 and the inner threaded sleeve 5 respectively; step S7, checking whether the axial size of the sleeve structure is consistent with the target axial size by using a measuring tool, if not, repeating steps S4 to S6 until the axial size of the sleeve structure is consistent with the target axial size; step S8, assembling the sleeve structure which has been debugged to the target position to be used as an axial positioning sleeve; and step S9, when the target axial size continuously changes, repeating steps S4 to S6 to continuously adjust the axial size of the sleeve structure.

[0050] Embodiment 2

[0051] Embodiment 2 is a preferred example of embodiment 1.

[0052] As shown in Figures 1 to 5 , the embodiment comprises an outer threaded sleeve 1, an inner threaded sleeve 5, a short circumferential wedge block sleeve 2, a long circumferential wedge block sleeve 6, a sliding bolt 7, a V-shaped block 3 and a fastening nut 4.

[0053] The outer threaded sleeve 1 is clearance fitted with the short circumferential wedge block sleeve 2, the inner threaded sleeve 5 is clearance fitted with the long circumferential wedge block sleeve 6, and the outer threaded sleeve 1 is connected with the inner threaded sleeve 5 through threads.

[0054] The first sleeve is processed with a certain number and a certain slope of first wedge blocks in the circumferential direction. In an embodiment, the first sleeve is processed with four first wedge blocks in the circumferential direction. In actual application, the number of first wedge blocks can be adjusted according to the installation condition, the load condition and the like, and the slope of the first wedge blocks can also be set independently. The second sleeve is processed with second wedge blocks consistent with the number and slope of the first wedge blocks of the first sleeve in the circumferential direction, and the second sleeve is also processed with a sliding groove. The head of the sliding bolt 7 is matched with the sliding groove on the long circumferential wedge block sleeve 6, and the sliding bolt 7 can slide in the sliding groove. The slope of the inclined surface of the V-shaped block 3 is consistent with the slope of the first wedge block and / or the second wedge block, and the V-shaped block 3 is processed with a guide hole which can be penetrated by the sliding bolt 7 and moved up and down along the sliding bolt 7.

[0055] The embodiment also provides a positioning method using the sleeve structure with continuously adjustable axial size, comprising the following steps:

[0056] Non-standard part design step: the basic size of the sleeve structure is determined according to the installation condition, load condition and operation environment, and the non-standard parts are designed and manufactured respectively, and the assembly features corresponding to each other are arranged on the parts with cooperation relationship;

[0057] Basic structure pre-assembly step: the initial assembly of the sleeve structure is performed, and whether the mutual movement between each part can occur according to the preset is checked;

[0058] Axial size determination step: the target axial size of the sleeve structure is determined according to the specific use requirement;

[0059] Assembly condition debugging step: in the embodiment, the hexagonal stepped features are arranged on the outer threaded sleeve 1 and the inner threaded sleeve 5, which provides a possibility for actual operation. The outer threaded sleeve 1 and the inner threaded sleeve 5 are rotated through the hexagonal stepped features until the total length of the sleeve structure is the target axial size, the phase of the short circumferential wedge block sleeve 2 and the long circumferential wedge block sleeve 6 is adjusted to align the first wedge block and the second wedge block, the fastening nut 4 is locked to generate the pre-tightening force between the V-shaped block 3 and the first wedge block and the second wedge block, and then the short circumferential wedge block sleeve 2 and the long circumferential wedge block sleeve 6 limit the axial positions of the outer threaded sleeve 1 and the inner threaded sleeve 5 respectively. At this time, each component is fixed as a whole. Before use, whether the axial size of the sleeve structure is consistent with the target axial size is checked by a measuring tool. If not, the debugging step should be repeated until the axial size of the sleeve structure is consistent with the target axial size.

[0060] Sleeve structure use step: the sleeve structure after debugging is assembled to the target position and can be used as an axial positioning sleeve.

[0061] In the axial size determination step, the target axial size can be continuously changed according to the specific use requirement. In the assembly condition debugging step, the sleeve structure can be used as a component in the mechanical system to complete the debugging step online.

[0062] As shown in Figure 6 , Figure 7 , the sleeve structure with continuously adjustable axial size can limit the axial spacing of the two side schematic parts to Figure 6 state one and Figure 7 state two. Actually, state one and state two represent the minimum value and the maximum value of the axial size of the sleeve structure with continuously adjustable axial size in the embodiment, and any positioning axial state between the two can be realized by the same sleeve structure. In addition, when adjusting from state one to state two or any intermediate state, the operation can be completed online without repeated disassembly, installation and other operations, and vice versa.

[0063] In the description of the present application, it needs to be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0064] The specific embodiments of the present application are described above. It needs to be understood that the present application is not limited to the above specific embodiments, and various changes or modifications can be made by those skilled in the art within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A sleeve structure with continuously adjustable axial dimensions, characterized in that, include: External threaded sleeve (1), internal threaded sleeve (5), short circumferential wedge block sleeve (2), V-block (3) and long circumferential wedge block sleeve (6); The short circumferential wedge sleeve (2) is provided with a first wedge block on its circumference, and the long circumferential wedge sleeve (6) is provided with a second wedge block on its circumference. The V-block (3) is installed between the first wedge block and the second wedge block. The inclined surfaces on both sides of the V-shaped surface of the V-shaped block (3) abut against the inclined surfaces of the first wedge block and the second wedge block, respectively. The distance between the short circumferential wedge block sleeve (2) and the long circumferential wedge block sleeve (6) is achieved by adjusting the position of the V-shaped block (3) relative to the inclined surfaces of the first wedge block and the second wedge block. The external threaded sleeve (1) is connected to the internal threaded sleeve (5). The external threaded sleeve (1) is installed on the side of the short circumferential wedge sleeve (2) facing away from the long circumferential wedge sleeve (6) and is limited by the short circumferential wedge sleeve (2). The internal threaded sleeve (5) is installed on the side of the long circumferential wedge sleeve (6) facing away from the short circumferential wedge sleeve (2) and is limited by the long circumferential wedge sleeve (6). The short circumferential wedge sleeve (2) is configured as a first sleeve in the middle, and a plurality of first wedges extend from the circumferential side of the first sleeve along the diameter direction. The side of the first wedge facing away from the first sleeve is configured as an inclined surface that is inclined toward the side of the second wedge. The long circumferential wedge sleeve (6) is configured as a second sleeve in the middle. Multiple second wedges extend from the circumferential side of the second sleeve along the diameter direction. The side of the second wedge facing away from the second sleeve is configured as an inclined surface that is inclined toward the side of the first wedge. The second sleeve is provided with a plurality of sliding grooves on one side of the short circumferential wedge sleeve (2), and the sliding grooves are on the same straight line as the first wedge or the second wedge along the parallel axis and are the same in number; The V-block (3) is provided with a guide hole, and the V-block (3) is installed on the sliding bolt (7) through the guide hole and the fastening nut (4) is engaged with it, allowing it to slide along the axial direction of the sliding bolt (7); The slope of the V-shaped surface of the V-block (3) is the same as the slope of the slope of the first wedge block and the second wedge block.

2. The sleeve structure with continuously adjustable axial dimensions according to claim 1, characterized in that: The number of the first wedge and the second wedge are the same and their positions correspond one-to-one along the parallel axis direction. The slope of the first wedge and the second wedge are the same.

3. The sleeve structure with continuously adjustable axial dimensions according to claim 1, characterized in that: The head of the sliding bolt (7) is mounted on the groove and allows it to slide relative to the groove; The V-block (3) achieves axial and radial movement relative to the short circumferential wedge sleeve (2) and the long circumferential wedge sleeve (6) through the sliding bolt (7). The V-block (3) achieves the movement of the V-shaped surface relative to the inclined surfaces of the first wedge block and the second wedge block through radial movement.

4. The sleeve structure with continuously adjustable axial dimensions according to claim 1, characterized in that: The external threaded sleeve (1) has a step at one end and the other end passes through the first sleeve and is threaded to the internal threaded sleeve (5). The internal threaded sleeve (5) has a step at one end and the other end passes through the second sleeve and is threaded to the external threaded sleeve (1). The step of the external threaded sleeve (1) is located on the side of the short circumferential wedge sleeve (2) away from the long circumferential wedge sleeve (6). The short circumferential wedge sleeve (2) limits the movement of the external threaded sleeve (1) toward the internal threaded sleeve (5). The step of the internal threaded sleeve (5) is located on the side of the long circumferential wedge sleeve (6) away from the short circumferential wedge sleeve (2). The long circumferential wedge sleeve (6) limits the movement of the internal threaded sleeve (5) toward the external threaded sleeve (1).

5. The sleeve structure with continuously adjustable axial dimensions according to claim 4, characterized in that: The external threaded sleeve (1) and the short circumferential wedge sleeve (2) are in clearance fit, and the internal threaded sleeve (5) and the long circumferential wedge sleeve (6) are in clearance fit.

6. A positioning method using a sleeve structure with continuously adjustable axial dimensions as described in any one of claims 1-5, characterized in that, Includes the following steps: Step S1: Determine the basic dimensions of the sleeve structure based on the installation conditions, load conditions, and operating environment; design and manufacture each part. Step S2: Perform initial assembly of each part and check whether the parts can move relative to each other as preset. Step S3: Determine the target axial dimension based on usage requirements; Step S4: Rotate the steps of the external threaded sleeve (1) and the internal threaded sleeve (5) until the total length of the external threaded sleeve (1) and the internal threaded sleeve (5) is the target axial dimension; Step S5: Adjust the phase of the short circumferential wedge sleeve (2) and the long circumferential wedge sleeve (6) to align the first wedge and the second wedge. Step S6, tighten the fastening nut (4) to generate a preload between the V-block (3) and the inclined surfaces of the first wedge block and the second wedge block, thereby causing the short circumferential wedge block sleeve (2) and the long circumferential wedge block sleeve (6) to respectively restrict the axial position of the external thread sleeve (1) and the internal thread sleeve (5); Step S7: Use a measuring tool to check whether the axial dimension of the sleeve structure is consistent with the target axial dimension. If they are inconsistent, repeat steps S4 to S6 until the axial dimension of the sleeve structure is consistent with the target axial dimension. Step S8: Assemble the debugged sleeve structure to the target position to use it as an axial positioning sleeve; Step S9: When the target axial dimension changes continuously, repeat steps S4 to S6 to continuously adjust the axial dimension of the sleeve structure.

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