Assembly jig and method for installing elastic piece

Abstract

The invention discloses an assembling clamp and a method for installing an annular elastic part, the assembling clamp is used for installing the elastic part on a workpiece, the assembling clamp comprises a base, a guide column and a driving part, the base comprises a joint part, and the joint part is cylindrical; the guide column is located at the top end of the joint part, and the radial size of the guide column is gradually increased from top to bottom. The driving piece comprises at least two pressing blocks and a bias pressing piece, the at least two pressing blocks are arranged around the radial outer side of the guide column, and the at least two pressing blocks are arranged to be capable of being switched between an initial state and a downward pressing state; in the initial state, the elastic piece is arranged on the radial outer side of the guide column in a sleeving mode, and at least parts of the opposite side faces of every two adjacent pressing blocks abut against each other. In the downward pressing state, the bottoms of every two adjacent pressing blocks are arranged at intervals, and the radial outer sides of the joint parts are sleeved with the elastic pieces; the bias pressing piece is connected with the at least two pressing blocks and arranged to be capable of driving the bottoms of the two adjacent pressing blocks to be close to each other.

Description

Technical Field

[0001] The invention relates to the technical field of elastic component installation, and in particular to an assembly fixture and a method for installing an elastic component. Background Art

[0002] At present, for most working machines, workers need to grasp the handles on the working machines with their hands to control the work of the working machines. During the operation of the working machines, the movement of their internal mechanisms will generate vibrations, and the vibration of the handles is more obvious. Although the outside of the handles is wrapped with a layer of rubber, the rubber layer alone has limited ability to absorb the vibrations of the handles, so that when people operate the working machines, their hands are subjected to relatively large impact force, which makes the hand feel uncomfortable, affects the operation, and even leads to operational errors.

[0003] In the prior art, in order to improve the vibration reduction effect on the handle, CN218875355U is taken as an example, which discloses a handle cover, which includes a handle cover body and a fixing part, wherein the handle cover body is detachably mounted on the outer periphery of the handle, and a plurality of elastic protrusions are arranged at intervals on the inner cavity wall of the handle cover body, and the elastic protrusions abut against the outer peripheral wall of the handle, and the fixing part can fix the handle cover body on the outer periphery of the handle. The handle cover is provided with a plurality of elastic protrusions at intervals on the inner cavity wall of the handle cover body, and when the handle vibrates, the elastic protrusions are elastically deformed under the action of the vibration force, thereby absorbing the vibration of the handle, reducing the vibration and impact of the handle on the hand, and providing comfort for holding.

[0004] In the above, the fixing member is a spring. A spring installation position is provided on the outer peripheral wall of the handle cover body, and the spring installation position is an annular receiving groove, in which the spring can be installed, so that the handle cover body is tightly sleeved on the outer peripheral wall of the handle.

[0005] In the prior art, when the handle cover body needs to be fixed to the handle, the spring is first manually stretched to allow the tension spring to be sleeved on the handle cover body and to allow the spring to face the annular receiving groove. Then, the spring is released to allow the spring to contract under the action of its own elastic restoring force and to abut against the bottom of the annular receiving groove, thereby achieving the fixation of the handle cover body and the handle. However, manually installing the spring into the receiving groove requires a large force, which is difficult and time-consuming to assemble, and has low assembly efficiency.

[0006] Therefore, it is urgent to invent a method for simply and quickly installing the spring to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a method for assembling a clamp and installing an elastic member to solve the above problems.

[0008] In order to solve the above technical problems, an embodiment of the present invention provides an assembly fixture, which is used to install an annular elastic member on a workpiece, comprising:

[0009] A base, the base comprising:

[0010] A joint portion, the joint portion is in a cylindrical shape with an axis extending in a vertical direction, and the outer diameter of the joint portion is larger than the inner diameter of the elastic member in a natural state;

[0011] A guide post, wherein the guide post is detachably connected to the top end of the joint portion and the outer diameter of the guide post gradually increases from top to bottom, and the outer diameter of the bottom end of the guide post is not less than the outer diameter of the joint portion;

[0012] A driving member, the driving member comprising:

[0013] At least two pressing blocks, a plurality of the pressing blocks are arranged around the radial outer side of the guide column and located on the top of the elastic member, and the plurality of the pressing blocks are arranged to be switchable between an initial state and a downward pressing state; in the initial state, the elastic member is sleeved on the radial outer side of the guide column, and at least a portion of the mutually opposite side surfaces of two adjacent pressing blocks abut against each other; in the downward pressing state, the bottoms of two adjacent pressing blocks are spaced apart, and the elastic member is sleeved on the radial outer side of the joint portion; and

[0014] A biasing member is connected to the plurality of pressing blocks and is configured to drive two adjacent pressing blocks to approach each other.

[0015] In one embodiment, the joint portion is cylindrical; the guide column is a cone, and the outer diameter of the bottom end of the guide column is the same as the outer diameter of the joint portion.

[0016] In one embodiment, the engaging portion and the guide post are snap-fitted.

[0017] In one embodiment, a groove is provided at the top end of the engaging portion, and a boss is provided at the bottom end of the guide column and is located in the groove.

[0018] In one embodiment, the groove is annular and is formed by a radial inner depression of the engaging portion; the boss is annular and the radial outer side of the boss abuts against the radial inner side of the groove.

[0019] In one embodiment, the driving member includes two pressing blocks. In the initial state, the opposite sides of the two pressing blocks abut against each other; in the downward pressing state, the bottoms of the two pressing blocks are spaced apart and the tops abut against each other.

[0020] In one embodiment, in the initial state, the two pressing blocks surround the guide post to form a cylindrical shape.

[0021] In one embodiment, in the initial state, the bottoms of the opposite sides of the two pressing blocks abut against each other, and the tops are spaced apart; in the pressing state, the bottoms of the two pressing blocks are spaced apart, and the tops abut against each other.

[0022] In one embodiment, the two pressing blocks have the same shape.

[0023] In one embodiment, the radial outer sides of the two pressing blocks are respectively provided with limiting grooves extending in the circumferential direction;

[0024] In one embodiment, the base further includes a limiting portion connected to a radially outer side of the engaging portion;

[0025] In the pressed-down state, the elastic member is located at the top of the limiting portion.

[0026] The biasing member is an elastic ring, which is elastic and located in the limiting grooves of the two pressing blocks.

[0027] In one embodiment, the assembly fixture further includes a pull piece, which is annular and sleeved on the radially outer side of the engaging portion, and the pull piece is located between the elastic member and the limiting portion along the axial direction.

[0028] In one embodiment, the limiting portion is in a ring shape extending along the circumference of the engaging portion.

[0029] The present invention also relates to a method for installing an elastic member, comprising the steps of:

[0030] S1, preparing the above-mentioned assembly fixture, installing the guide column on the top end of the joint portion of the base, and sleeve the elastic member on the radial outer side of the guide column;

[0031] S2, sleeve the driving member on the radial outer side of the guide column and make the pressing block be located on the top of the elastic member,

[0032] The plurality of pressing blocks are pressed down along the guide column, so that the plurality of pressing blocks continuously push the elastic member downward.

[0033] until the elastic member is moved to the engaging portion;

[0034] S3, removing the driving member and the guide column;

[0035] S4, sleeve the base on the outside of the workpiece, move the base along the workpiece to the installation position of the workpiece, and move the elastic member from the joint portion to the installation position;

[0036] S5. Remove the base from the workpiece, and the assembly is completed.

[0037] In one embodiment, in step S1, before installing the guide post on the top end of the joint portion, the step further includes: sleeve an annular puller on the radial outer side of the joint portion;

[0038] In step S2, the elastic member moves to the joint portion and is located on the top of the pull piece;

[0039] In step S4, the pull piece is moved and the elastic member is pushed to the installation position.

[0040] The assembly fixture of the present invention can easily install the elastic member on the workpiece without manually stretching the elastic member, and can also improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a three-dimensional diagram of an assembly fixture in an initial state according to an embodiment of the present invention.

[0042] Figure 2 yes Figure 1 Exploded view of the assembly fixture in the illustrated embodiment.

[0043] Figure 3 yes Figure 1 A three-dimensional view of the assembly fixture in the embodiment shown in the downward pressing state.

[0044] Figure 4 and Figure 5 is a three-dimensional diagram of an assembly fixture according to another embodiment of the present invention in an initial state.

[0045] Figure 6 yes Figure 4 Exploded view of the assembly fixture in the illustrated embodiment.

[0046] Figure 7 yes Figure 4 A three-dimensional view of the assembly fixture in the embodiment shown in the downward pressing state.

[0047] Figure 8 and Fig. 9 It is a three-dimensional diagram of a base, an elastic member, a pull piece, a handle and a handle cover in one embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present invention, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed for protection in the claims of the present application can be implemented.

[0049] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0050] The following will be described in detail with reference to the accompanying drawings to provide a clearer understanding of the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0051] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0052] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0053] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0054] The present invention relates to an assembly fixture 100, which can be used to install an elastic member 5 on a workpiece, and the workpiece can be a handle 200 and a handle cover 201 in patent CN218875355U. Figure 8 and 9 As shown, the handle 200 can be used on a lawn mower or other mechanical equipment for convenient manual operation. The handle cover 201 is sleeved on the outside of the handle 200 for preventing hand tremors. The handle cover 201 is provided with a mounting position, which is a recessed receiving groove 202 on the outside of the handle cover 201. The receiving groove 202 is close to both ends of the handle cover 201, and the receiving groove 202 is used to accommodate the elastic member 5. The device fixture of the present invention can install the elastic member 5 in the receiving groove 202 on the outside of the handle cover 201, and the installation is convenient and quick, and the assembly efficiency can be improved.

[0055] Specifically, the assembly fixture 100 includes a base 1 , a pull piece 2 , a guide column 3 and a driving member 4 .

[0056] The base 1 includes a cylindrical joint portion 11 and an annular limiting portion 12. The joint portion 11 is a cylindrical shape extending around a vertical axis, which can be used to install the elastic member 5, and the outer diameter of the joint portion 11 is larger than the inner diameter of the elastic member 5 in the natural state, that is, the elastic member 5 needs to be stretched before it can be installed on the joint portion 11. The joint portion 11 can also be sleeved on the outside of the handle 200, that is, the elastic member 5 can be stretched and then sleeved on the joint portion 11, and then the joint portion 11 is sleeved on the outside of the handle 200, and the elastic member 5 is transferred to the handle cover 201 along with the joint portion 11, and the elastic member 5 is moved from the joint portion 11 to the receiving groove 202 of the handle cover 201. It should be understood that the joint portion 11 can also be a cylindrical shape of other shapes, such as a cylindrical shape with a radial cross section of a square or polygonal shape, etc., as long as the outer diameter of the joint portion 11 can adapt to the handle 200.

[0057] The limiting portion 12 is sleeved on the radially outer side of the joint portion 11 and extends along the circumference of the joint portion 11 to form a circular ring shape. The limiting portion 12 can prevent the elastic member 5 from being separated from the joint portion 11. The limiting portion 12 can be a circular ring with an outer diameter greater than that of the joint portion 11, or a ring of other shapes, as long as the outer diameter of the limiting portion 12 is greater than that of the joint portion 11. In some embodiments, the limiting portion 12 can also be a plurality of protrusions protruding from the radially outer side of the joint portion 11, and the plurality of protrusions are arranged along the circumference of the joint portion 11, which can also limit the elastic member 5 from being separated from the joint portion 11.

[0058] It should be understood that the cylindrical joint 11 includes a plurality of strip rods arranged along the vertical axis to form a cylinder, that is, the cylindrical joint 11 is not necessarily an integrally formed cylinder, but may also be other shapes, as long as there is a circular hole in the middle for installing the handle 200 and the radial outer side can support the elastic member 5.

[0059] The pull piece 2 is annular and is sleeved on the radially outer side of the joint portion 11 and is located at the top of the limiting portion 12, that is, it is located between the limiting portion 12 and the elastic member 5 along the axial direction. The limiting portion 12 can limit the pull piece 2 from being separated from the joint portion 11. After the joint portion 11 is sleeved on the outside of the handle 200, the pull piece 2 can be used to move the elastic member 5 and remove the elastic member 5 from the joint portion 11. Of course, in other embodiments, the pull piece 2 can also be omitted, and the elastic member 5 can be directly removed manually along the joint portion 11.

[0060] The guide post 3 is mainly used to facilitate the installation of the elastic member 5 to the joint 11. Specifically, the guide post 3 is a cone and is located at the top of the joint 11. The diameter of the guide post 3 gradually increases from top to bottom, and the outer diameter of the bottom of the guide post 3 is the same as the outer diameter of the joint 11. Of course, in other embodiments, the outer diameter of the bottom of the guide post 3 can also be greater than the outer diameter of the joint 11. It should be understood that the guide post 3 can also be a cone of other shapes, as long as the outer diameter of the guide post 3 gradually increases from top to bottom, so that the driving member 4 can press the elastic member 5 to the joint 11.

[0061] The guide post 3 is located at the top of the joint 11. If the lower end surface of the guide post 3 is a plane, it can be directly overlapped on the top of the joint 11. Of course, in other embodiments, the guide post 3 can also be detachably connected to the joint 11. Figure 1-3 In the illustrated embodiment, the guide post 3 and the engaging portion 11 are snap-fitted. Specifically, the top of the engaging portion 11 is provided with an annular groove 13, which is formed by a certain depth of depression of the radial inner side of the engaging portion 11. The bottom end of the guide post 3 is provided with an annular boss 31 that matches the groove 13, and the boss 31 protrudes from the bottom end of the guide post 3 and has a certain distance from the radial outer side of the guide post 3, that is, the boss 31 is not close to the radial outer side of the guide post 3. The boss 31 is located in the groove 13 and the radial outer side of the boss 31 is close to the radial inner side of the groove 13. The boss 31 cooperates with the groove 13 to prevent the guide post 3 from tilting.

[0062] In other embodiments, multiple protruding columns may be provided at the bottom of the guide column 3, and the multiple columns are arranged circumferentially and located in the groove 13. Of course, multiple columnar grooves 13 may also be provided at the top of the joint 11 to accommodate multiple columns respectively.

[0063] exist Fig. 9 In the illustrated embodiment, the receiving groove 202 is located at both ends of the handle cover 201. The two ends of the handle cover 201 are also provided with a limiting ring 203. The limiting ring 203 is located at the outer end of the receiving groove 202, which can prevent the elastic member 5 in the receiving groove 202 from being separated from the handle cover 201. In addition, the width of the limiting ring 203 along its axial direction is substantially equal to the depth of the groove 13 of the joint portion 11, that is, the radial outer side of the limiting ring 203 can be directly inserted into the groove 13 of the joint portion 11. When the elastic member 5 needs to be installed, the joint portion 11 can be moved to both ends of the handle cover 201, and the groove 13 of the joint portion 11 is sleeved on the radial outer side of the limiting ring 203, that is, the groove 13 and the limiting ring 203 of the handle cover 201 are just engaged, which is convenient for fixing the base 1. After the base 1 is fixed, the elastic member 5 is moved to the receiving groove 202 by using the puller 2.

[0064] It can be seen that the depth of the groove 13 of the joint 11 needs to be designed according to the depth of the limit ring 203 along its axis, that is, the depth of the cavity needs to be greater than or equal to the width of the limit ring 203 along its axis.

[0065] Optionally, the guide column 3 and the top end of the joint portion 11 may be detachably connected by magnetic attraction, and the present invention does not limit the connection method between the guide column 3 and the joint portion 11 .

[0066] The driving member 4 includes two pressing blocks 41 and a biasing member. The two pressing blocks 41 are of the same shape and are symmetrically arranged around the radial outer side of the guide column 3. The two pressing blocks 41 are in a separable state and a cavity is formed on the radial inner side. In this embodiment, the cavity is a cylindrical cavity. The two pressing blocks 41 are sleeved on the radial outer side of the guide column 3 and are located on the top of the elastic member 5. The orthographic projections of the two pressing blocks 41 and the orthographic projections of the annular elastic member 5 at least partially overlap. The orthographic projections are Figure 1 , Figure 3 , Figure 4 or Figure 7 The projection in the vertical direction is shown, that is, in the process of pushing the elastic member 5 downward, at least a part of the two pressing blocks 41 always abuts against the elastic member 5 to push the elastic member 5 to move downward.

[0067] The radial outer sides of the two pressing blocks 41 are respectively provided with limiting grooves 42, and the limiting grooves 42 of the two pressing blocks 41 are respectively arranged in a radial direction to form annular concave circles. The biasing member is an elastic ring 44 with elasticity, and the elastic ring 44 is generally a rubber ring and is sleeved in the annular concave circle. The elastic ring 44 drives the two pressing blocks 41 to approach each other and makes the two pressing blocks 41 elastically connected to prevent the two pressing blocks 41 from separating from each other.

[0068] exist Figure 1 and Figure 4 In the embodiment shown, the two pressing blocks 41 are respectively provided with two limiting grooves 42 arranged along the axial direction, the two limiting grooves 42 of the two pressing blocks 41 respectively form two annular concave circles, and the two elastic rings 44 are respectively located in the two annular concave circles. The two elastic rings 44 can drive the two pressing blocks 41 to approach each other.

[0069] The two pressing blocks 41 can move between the initial state and the downward pressing state. In the initial state, the elastic member 5 is sleeved on the radial outer side of the guide column 3, and the two pressing blocks 41 are located on the radial outer side of the guide column 3, and a cylindrical cavity is formed, and the bottom of the cylindrical cavity is completely against the top of the elastic member 5. In the initial state, the elastic member 5 can be in a natural state, and the outer diameter of the elastic member 5 is greater than or equal to the inner diameter of the bottom of the cavity formed by the two pressing blocks 41. It can be understood that in other embodiments, in the initial state, the elastic member 5 can also be in a stretched state with a certain elasticity, that is, the elastic member 5 is partially expanded by manual operation, and at this time, the outer diameter of the elastic member 5 after being expanded is greater than or equal to the inner diameter of the bottom of the cavity of the two pressing blocks 41. The outer diameter of the elastic member 5 expanded is greater than or equal to the inner diameter of the cavity formed by the two pressing blocks 41. In this embodiment, the inner diameter of the cavity is the inner diameter of the bottom of the cavity. In some embodiments, the inner diameter of the cavity can also be the inner diameter of at least a part of the cavity.

[0070] Applying downward pressure to the two pressing blocks 41 can make the two pressing blocks 41 push the elastic member 5 downward, and finally make the elastic member 5 move to the radial outer side of the joint 11. At this time, the two pressing blocks 41 are in a downward pressure state, and the elastic member 5 is sleeved on the outer side of the joint 11 and located on the top of the pull piece 2. During the downward pressure of the two pressing blocks 41, as the outer diameter of the guide column 3 gradually increases, the part of the bottom of the cavity of the two pressing blocks 41 against the elastic member 5 gradually decreases, but a part of each pressing block 41 always abuts against the elastic member 5. Figure 4 As shown, the parts of the cavity bottoms of the two pressing blocks 41 facing each other always abut against the elastic member 5 .

[0071] After removing the two pressing blocks 41 and the guide column 3, the base 1 can be sleeved on the outside of the handle 200, and the base 1 can be pushed along the handle 200 to the handle sleeve 201, and the groove 13 of the joint part 11 is clamped on the limiting part 12. The pull piece 2 is moved to move the elastic member 5 from the joint part 11 to the accommodating groove 202, and then the base 1 is removed from the handle 200 to complete the installation of the elastic member 5.

[0072] Since the elastic force of the elastic member 5 is relatively large, if the elastic member 5 is directly put on the handle 200 and then installed in the receiving groove 202 manually, a large pulling force will be required, and the installation is very difficult. By using the assembly fixture 100 of the present invention, the elastic member 5 can be easily installed in the receiving groove 202, and the installation efficiency can be improved.

[0073] exist Figure 1-Figure 3In the embodiment shown, the two pressing blocks 41 have the same shape and match each other to form a cylindrical shape. The two pressing blocks 41 can be regarded as two symmetrical arc surfaces formed by cutting a cylindrical column along its axial direction, and the two side surfaces 43 of the two pressing blocks 41 opposite to each other are both vertical surfaces extending in the vertical direction. In the initial state, the vertical surfaces of the two pressing blocks 41 opposite to each other are tightly fitted against each other and form a cylindrical shape. At this time, the two pressing blocks 41 are sleeved on the outside of the guide column 3 and are located on the top of the elastic member 5. In the process of pressing the two pressing blocks 41 downward, the two vertical surfaces of the two pressing blocks 41 opposite to each other are gradually separated, and the spacing between the vertical surfaces of the two pressing blocks 41 opposite to each other is gradually reduced from the bottom to the top. In the downward pressing state, the bottoms of the two pressing blocks 41 are spaced apart, and the tops are against each other. At this time, the elastic member 5 is located radially outside the joint 11.

[0074] It should be understood that the external shapes of the two pressing blocks 41 are not limited by this embodiment and can be any shape. The biasing member can also be in other ways, such as magnetic attraction, where the top ends of the two pressing blocks 41 are movably connected, and the bottom ends are provided with magnetic blocks that attract each other, and the bottoms of the two pressing blocks 41 can also be driven to approach each other.

[0075] exist Figure 4-Figure 7 In the embodiment shown, the two pressing blocks 41 also have the same shape, and Figure 1 The difference between the illustrated embodiments is that the two sides 43 of the two pressing blocks 41 facing each other are not a vertical surface. Specifically, in the initial state, in the two sides 43 of the two pressing blocks 41 facing each other, the bottom of the sides 43 of the two pressing blocks 41 is a vertical surface extending in the vertical direction, the two vertical surfaces abut against each other, and the tops of the sides 43 of the two pressing blocks 41 facing each other gradually deviate from each other, that is, the tops are inclined surfaces that gradually deviate from the vertical surface and form a certain angle, and the angle range can be 0° to 180°. In addition, the inner diameter of the top of the two pressing blocks 41 is greater than the inner diameter of the bottom. In the downward pressing state, the tops of the sides 43 of the two pressing blocks 41 facing each other are vertical surfaces extending in the vertical direction and abut against each other. The bottoms of the sides 43 of the two pressing blocks 41 facing each other are inclined surfaces that gradually deviate from the vertical surface. In other words, in the process of pressing the two pressing blocks 41 downward, the bottoms of the sides 43 of the two pressing blocks 41 facing each other gradually separate and form a certain angle, and the angle of the tops gradually deforms to fit each other. Furthermore, the outer side surfaces 43 of the two pressing blocks 41 in the pressed state are formed into a cylindrical shape.

[0076] During the process of the two pressing blocks 41 moving from the initial state to the downward pressing state, the supporting points where the opposite sides 43 of the two pressing blocks 41 contact each other gradually move from the bottom to the top. In the downward pressing state, the tops of the two pressing blocks 41 are relatively pressed against each other. Figure 1-3In the embodiment shown, the fulcrums of the two pressing blocks 41 are always at the tops of the two pressing blocks 41 from the initial state to the downward pressing state. Long-term use will cause the tops of the two pressing blocks 41 to be worn. Figure 4-7 In the illustrated embodiment, the supporting points of the two pressing blocks 41 gradually transition to the top, which can reduce the wear of the two pressing blocks 41 and extend their service life.

[0077] exist Figure 4-Figure 7 In the illustrated embodiment, in the initial state, the cavity of the two pressing blocks 41 is not a cylindrical cavity, but a cavity that gradually decreases from the top to the bottom, and the bottom of the cavity is completely against the top of the elastic member 5. In the initial state, the elastic member 5 can also be in a natural state, and the outer diameter of the elastic member 5 is greater than or equal to the inner diameter of the bottom of the cavity formed by the two pressing blocks 41. The elastic member 5 can also be in a stretched state with a certain elasticity, and the stretched outer diameter of the elastic member 5 is greater than or equal to the inner diameter of the cavity formed by the two pressing blocks 41. During the downward pressing process of the two pressing blocks 41, the inner diameter of the bottom of the cavity gradually increases, and the part of the bottom of the cavity against the elastic member 5 gradually decreases, until in the downward pressing state, at least a part of the bottom of the cavity always abuts against the elastic member 5.

[0078] As an optional solution, at least two pressing blocks 41 can be set to drive the elastic member 5 to move. The at least two pressing blocks 41 can be arranged around the vertical axis and located at the top of the elastic member 5. The at least two pressing blocks 41 can be switched between an initial state and a downward pressing state. In the initial state, the elastic member 5 is sleeved on the radial outer side of the guide column 3, and a part or all of the side surfaces 43 of two adjacent pressing blocks 41 facing each other are in contact with each other; in the downward pressing state, the bottoms of two adjacent pressing blocks 41 are spaced apart and the tops are in contact with each other. The number of pressing blocks 41 can be selected to be three or four, or even more, and can be set as needed.

[0079] The present invention also relates to a method for installing an elastic member 5, comprising the steps of:

[0080] S1, prepare the above-mentioned assembly fixture 100, install the guide column 3 on the top of the joint portion 11 of the base 1, and cover the elastic member 5 on the radial outer side of the guide column 3;

[0081] S2, sleeve the driving member 4 on the radial outer side of the guide column 3 so that the driving member 4 is located on the top of the elastic member 5, and press two pressing blocks 41 or at least two pressing blocks 41 down along the guide column 3, so that the pressing blocks 41 continuously push the elastic member 5 downward until the elastic member 5 is moved to the joint portion 11;

[0082] S3, remove the driving member 4 and the guide column 3;

[0083] S4, cover the base 1 on the outside of the handle 200, and move the base 1 along the handle 200 to the installation position of the handle cover 201, and move the elastic member 5 from the joint portion 11 to the installation position, that is, into the receiving groove 202;

[0084] S5. Remove the base 1 from the handle 200, and the assembly is completed.

[0085] In addition, before installing the guide post 3 on the top of the joint portion 11 in step S1, the method further includes: sleeve the annular puller 2 on the radial outer side of the joint portion 11;

[0086] In step S2, the elastic member 5 is moved to the joint portion 11 and positioned on the top of the pull piece 2;

[0087] In step S4, the pull piece 2 is moved to push the elastic member 5 to the installation position.

[0088] In addition, the assembly fixture 100 of the present invention can also be used on other workpieces, not limited to the handle 200, and the shape of the base 1 can be adjusted as needed to adapt it to other workpieces, such as adjusting the size or shape of the circular hole of the joint 11 to adapt it to other workpieces.

[0089] The assembly fixture 100 of the present invention can easily install the elastic member 5 on the workpiece without manually stretching the elastic member 5, and can also improve assembly efficiency.

[0090] Preferred embodiments of the present invention have been described above in detail, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0091] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0092] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An assembly fixture, which is used to install an annular elastic member on a workpiece, characterized in that: include: A base, the base comprising a joint portion, the joint portion being in a cylindrical shape with an axis extending in a vertical direction, and the outer diameter of the joint portion being larger than the inner diameter of the elastic member in a natural state; as well as A guide post, wherein the guide post is located at the top of the joint portion and the outer diameter of the guide post gradually increases from top to bottom, and the outer diameter of the bottom end of the guide post is not less than the outer diameter of the joint portion; A driving member, the driving member comprising: At least two pressing blocks, at least two of the pressing blocks are arranged around the radial outer side of the guide column and located on the top of the elastic member, and at least two of the pressing blocks are arranged to be switchable between an initial state and a downward pressing state; in the initial state, the elastic member is sleeved on the radial outer side of the guide column, and at least a portion of the mutually opposite side surfaces of two adjacent pressing blocks abut against each other; in the downward pressing state, the bottoms of two adjacent pressing blocks are spaced apart, and the elastic member is sleeved on the radial outer side of the joint portion; and A biasing member is connected to at least two of the pressing blocks and is configured to drive two adjacent pressing blocks to approach each other.

2. The assembly fixture according to claim 1, characterized in that: The joint part is cylindrical; the guide column is a cone, and the outer diameter of the bottom end of the guide column is the same as the outer diameter of the joint part.

3. The assembly fixture according to claim 1, characterized in that: The engaging portion and the guide column are detachably connected.

4. The assembly fixture according to claim 3, characterized in that: The top end of the joint portion is provided with a groove, and the bottom end of the guide column is provided with a boss located in the groove.

5. The assembly fixture according to claim 4, characterized in that: The groove is annular and is formed by a radial inner depression of the engaging portion; the boss is annular and the radial outer side of the boss abuts against the radial inner side of the groove.

6. The assembly fixture according to claim 1, characterized in that: The driving member comprises two pressing blocks. In the initial state, the opposite sides of the two pressing blocks abut against each other. In the downward pressing state, the bottoms of the two pressing blocks are spaced apart and the tops abut against each other.

7. The assembly fixture according to claim 6, characterized in that: In the initial state, the two pressing blocks form a cylindrical shape around the guide column.

8. The assembly fixture according to claim 1, characterized in that: In the initial state, the bottoms of the opposite sides of the two pressing blocks abut against each other, and the tops are spaced apart; in the downward pressing state, the bottoms of the two pressing blocks are spaced apart, and the tops abut against each other.

9. The assembly fixture according to any one of claims 6 or 8, characterized in that: The radial outer sides of the two pressing blocks are respectively provided with limiting grooves extending in the circumferential direction; The biasing member is an elastic ring, which is elastic and located in the limiting grooves of the two pressing blocks.

10. The assembly fixture according to claim 1, characterized in that: The base further includes a limiting portion connected to the radially outer side of the engaging portion; in the pressed-down state, the elastic member is located at the top of the limiting portion.

11. The assembly fixture according to claim 10, characterized in that: The assembly fixture further comprises a pull piece, which is annular and sleeved on the radially outer side of the engaging portion, and is located between the elastic member and the limiting portion along the axial direction.

12. The assembly fixture according to claim 1, characterized in that: The limiting portion is in a ring shape extending along the circumference of the joint portion.

13. A method for installing an elastic member, characterized in that: Includes steps: S1. Prepare the assembly fixture according to claim 1, install the guide post on the top of the joint portion of the base, and sleeve the elastic member on the radial outer side of the guide post; S2, sleeve the driving member on the radial outer side of the guide column and make the pressing block located on the top of the elastic member, and press the plurality of pressing blocks down along the guide column with force, so that the plurality of pressing blocks continuously push the elastic member downward until the elastic member is moved to the joint portion; S3, removing the driving member and the guide column; S4, sleeve the base on the outside of the workpiece, move the base along the workpiece to the installation position of the workpiece, and move the elastic member from the joint portion to the installation position; S5. Remove the base from the workpiece, and the assembly is completed.

14. The method for installing an elastic member according to claim 13, characterized in that: In step S1, before the guide post is installed on the top end of the joint portion, the method further includes: sleeve an annular puller on the radial outer side of the joint portion; In step S2, the elastic member moves to the joint portion and is located on the top of the pull piece; In step S4, the pull piece is moved and the elastic member is pushed to the installation position.

Images