CN111637178A - One-way adjusting device of structural clearance - Google Patents
One-way adjusting device of structural clearance Download PDFInfo
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- CN111637178A CN111637178A CN202010488545.7A CN202010488545A CN111637178A CN 111637178 A CN111637178 A CN 111637178A CN 202010488545 A CN202010488545 A CN 202010488545A CN 111637178 A CN111637178 A CN 111637178A
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- adjusting
- sleeve
- adjusting nut
- ring
- spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/42—Slack adjusters mechanical non-automatic
- F16D65/46—Slack adjusters mechanical non-automatic with screw-thread and nut
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Abstract
The invention provides a structure clearance one-way adjusting device, comprising: the rotating structure is formed by sleeving an adjusting screw rod on an adjusting nut; the thrust seat is sleeved on the rotating structure; the adjusting sleeve is sleeved with the rotating structure as a stress structure; the transmission ring is sleeved with the rotating structure and abuts against the top of the rotating structure, spring parts are arranged on the outer sides of the adjusting sleeve and the transmission ring, and when the adjusting sleeve is stressed and moves in the same direction as the rotating direction of the spring parts, the spring parts tightly hold the adjusting sleeve and the transmission ring, so that the adjusting sleeve rotates to drive the transmission ring to rotate through the spring parts, and the rotating structure rotates; when the adjusting sleeve is stressed and moves in the direction opposite to the rotating direction of the spring piece, the spring piece is separated from the adjusting sleeve and the conducting ring, and the rotating structure stops rotating, so that excessive clearance generated by contact friction of the moving piece and the static piece due to relative movement is eliminated.
Description
Technical Field
The invention belongs to the technical field of mechanical structures, and particularly relates to a structure gap unidirectional adjusting device.
Background
In the prior art, there are various transmission structures that include relative movement of a stationary member and a moving member. In one model, the movable part is controlled to move towards the direction of the static part, so that the movable part is butted with the static part, corresponding transmission is completed, in other words, the distance between the movable part and the static part is adjusted, and the movable part moves towards the static part.
In contrast to the above model, one practical application is in a vehicle brake where braking is generated or eliminated by adjusting the clearance distance between a friction pad and a brake disc to control the movement of the friction pad towards or away from the brake disc. That is, when the braking function needs to be generated, the clearance between the brake disc and the friction plate is eliminated, so that the brake disc and the friction plate are attached to generate braking; on the contrary, when it is required to eliminate the braking function, a predetermined interval should be maintained between the disc and the friction plate. It is readily seen that in structures such as brake disc braking, the accuracy of the clearance adjustment directly affects the rate at which the braking force is generated and the magnitude of the braking force generated.
The prior art provides an adjustment structure, and it combines including adjusting sleeve and conduction ring to constitute the adjustment structure with the nut adaptation, in this kind of structure, produce the jamming easily between rectangular spring and the adjusting sleeve, the conduction ring can't produce stable frictional force with adjusting nut contact, under the long-term operating mode, causes structural damage easily. Furthermore, taking the braking process as an example, when the friction plate and the brake disc should be in a non-contact state, that is, the friction plate and the brake disc should be away from each other according to a preset interval, so as to avoid drag braking of the friction plate and the brake disc. Under prior art, the clearance between brake disc and the friction disc is adjusted, mostly linear motion adjusts, also through linear motion's mechanical structure to realize contact or separation between brake disc and the friction disc, however, linear adjustment mode has the motion line length in the accommodation process, the big problem of regulating power of demand, in addition, because the limitation that linear adjustment mode exists, the structure of assembly is difficult to compact, has been difficult to satisfy the requirement that pneumatic braking technique proposed to the whole volume of mechanism. In summary, the way of adjusting the clearance between moving part and the stationary part is mostly through the linear motion mode promotion moving part to stationary part one side removal promptly, and simple linear adjustment mode has the adjustment line journey length, the big technical problem of regulating power demand.
On the other hand, theoretically, the friction generated between the brake disc and the friction plate during each braking will reduce the thickness of the friction plate and the brake disc to different degrees, that is, the mutual friction generated during the braking process will increase the distance between the friction plate and the brake disc due to the thickness reduction of the friction plate and the brake disc, and then the distance between the brake disc and the friction plate will gradually increase to exceed the set standard along with the running and repeated braking of the vehicle, so as to form an excessive gap. For example, if a predetermined clearance of a brake is 0.8mm, that is, a stable clearance between a brake disc and a friction plate is 0.8mm, and the clearance therebetween exceeds 0.8mm and the brake is applied again, the time for applying the brake is delayed or the brake disc and the friction plate are not brought into close contact with each other to apply a sufficient braking force. In summary, the excessive clearance generated between the brake disc and the friction plate causes the clearance adjustment distance between the brake disc and the friction plate to deviate from the adjustment distance required for actual braking, that is, the time for generating the braking force or the magnitude of the generated braking force is affected.
Summarizing the above examples of the brake disc and the friction plate, that is, the prior art lacks a transmission structure, which can realize the unidirectional adjustment of the gap between the moving member and the stationary member, or lacks a transmission structure which can keep the gap between the moving member and the stationary member at a preset distance all the time without being influenced by the transmission process and the movement process.
In view of this, the prior art should be improved to solve the technical problem that the gap between the moving part and the stationary part is difficult to adjust in one direction in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a structural gap one-way adjusting device which can eliminate excessive gaps generated by friction deformation in the relative motion process of a moving part and a static part, so that a preset distance is kept between the moving part and the static part, and meanwhile, the gap adjusting mode between the moving part and the static part in the prior art is changed from a linear mode to a mode of converting rotary motion into a linear mode, so that the relative motion between a motion hall and the static part and the whole transmission structure are more stable.
In order to solve the above technical problem, the present invention provides a structure gap unidirectional adjusting device, comprising: the rotating structure is formed by sleeving an adjusting screw rod on an adjusting nut; the thrust seat is sleeved on the rotating structure; the adjusting sleeve is sleeved with the rotating structure as a stress structure; the transmission ring is sleeved with the rotating structure and abuts against the top of the rotating structure, spring parts are arranged on the outer sides of the adjusting sleeve and the transmission ring, and when the adjusting sleeve is stressed and moves in the same direction as the rotating direction of the spring parts, the spring parts tightly embrace the adjusting sleeve and the transmission ring, so that the adjusting sleeve rotates to drive the transmission ring to rotate through the spring parts, and the rotating structure rotates; when the adjusting sleeve is stressed and moves in the direction opposite to the rotating direction of the spring piece, the spring piece is separated from the adjusting sleeve and the conducting ring, and the rotating structure stops rotating.
Preferably, the adjusting screw rod is sleeved in the adjusting nut and forms a threaded connection with the adjusting nut, and then the adjusting nut rotationally drives the adjusting screw rod to rotationally move axially.
Further preferably, the adjusting sleeve comprises a first shaft sleeve and a second shaft sleeve which are integrally formed from bottom to top, the radius of the first shaft sleeve is larger than that of the second shaft sleeve, a step structure is formed between the first shaft sleeve and the second shaft sleeve, the clamping groove and the second shaft sleeve are of a non-communicating structure, a clamping groove which is radially recessed is formed in the first shaft sleeve, the driving piece is inserted into the clamping groove, the width of the driving piece is smaller than that of the clamping groove, and the driving piece reciprocates in the clamping groove and is limited by the notch of the clamping groove.
Still further preferably, form annular assembly mesa on the adjusting nut, define as first assembly mesa, the thrust bearing with the adjusting nut cover is established, its one side surface with the laminating of first assembly mesa, adjusting collar, conduction ring in proper order with the adjusting nut cover is established, wherein, the spring part with adjusting collar with the conduction ring cover is established, just the conduction ring with when adjusting nut cover is established, the conduction ring inboard wall with adjusting nut's top offsets, so that the conduction ring with leave the clearance between the top of adjusting collar.
Still further preferably, a circumferential flange is formed at an opening at one end of the inner cavity wall of the guide ring, and a tangent plane formed between the circumferential flange and the inner cavity wall of the guide ring is in contact with one end of the adjusting nut, wherein the adjusting sleeve drives the guide ring to rotate through the spring piece when rotating, and the tangent plane formed between the circumferential flange and the inner cavity wall is in contact extrusion with one end of the adjusting nut to generate friction force, so that the adjusting nut rotates.
Still further preferably, a tangent plane formed between the circumferential flange and the inner cavity wall is a spherical surface, a conical surface or a flat surface.
Still further preferably, a screw gasket is arranged between the adjusting nut and the thrust seat, and the thrust seat is attached to the first assembling table surface of the adjusting nut and compresses the screw gasket.
Still further preferably, an adjusting gasket, a pressure spring and a pressing gasket are arranged at one end of the adjusting nut, which is close to the adjusting sleeve and the conducting ring, wherein the pressing gasket is located between the conducting ring and the pressure spring, the pressing gasket, the pressure spring and the adjusting gasket are sequentially sleeved on the adjusting nut, and the pressing gasket and the conducting ring are pressed by the pressure spring, so that the conducting ring is tightly attached to the adjusting nut.
Still further preferably, a belleville spring and a shaft retainer ring may be further included between the thrust seat and the adjusting sleeve, wherein the shaft retainer ring is located between the belleville spring and the adjusting sleeve and is clamped with the adjusting nut, and the belleville spring is limited and compressed by the shaft retainer ring and the adjusting nut, so that the belleville spring forms resistance to movement between the adjusting nut and the thrust seat.
Still preferably, a bottom surface of the adjusting screw is formed with an anti-rotation pin extending vertically downward, the anti-rotation pin being inserted into the push plate.
Compared with the prior art, the invention has the following beneficial technical effects due to the adoption of the technical scheme:
1. the adjusting rod in the gap adjusting structure is simply linearly moved in the relative movement process of the moving part and the static part in the prior art, the adjusting rod is improved into the adjusting screw rod and the adjusting nut which are matched through threads, and the adjusting nut is rotated to drive the adjusting screw rod to axially move, so that the linear movement of the adjusting screw rod is improved into the axial movement driven through rotation;
2. the other beneficial effect of the mode of driving the adjusting screw rod to move axially in a rotating mode is that the gap adjusting structure of the structure can reduce the movement thread in the adjusting process, reduce the adjusting force required by gap adjustment, and correspondingly, the size of the adjusting structure can be reduced by reducing the movement thread in the adjusting process, so that the structure is more compact, and the new requirement of the air braking technology on the whole size of the mechanism is met;
3. the adjusting sleeve is provided with a clamping groove which is radially sunken, relative movement between the driving device and the adjusting sleeve is realized by inserting a driving piece of the driving device into the clamping groove of the adjusting sleeve, the driving piece moves in the clamping groove and is limited by the side walls on two sides of the clamping groove, meanwhile, the adjusting sleeve comprises a first shaft sleeve and a second shaft sleeve which are integrally formed from bottom to top, and the clamping groove and the second shaft sleeve are of a non-communicated structure, so that when a spring part is sleeved on the adjusting sleeve and the transmission ring, the spring part can be ensured to freely rotate on the surface of the adjusting sleeve without generating clamping stagnation, and the service life of the spring part is obviously prolonged;
4. in the invention, the contact surface is designed into a spherical surface, a conical surface or a right-angle plane, so that the angular contact between the inner cavity wall of the conductive ring and the adjusting nut is more stable, namely, when the conductive ring rotates, the friction force generated by the contact of the circumferential flange and one end of the adjusting nut is more stable, thereby ensuring the stability of the conductive ring driving the adjusting nut to rotate so as to generate braking;
5. in order to achieve the purpose of reducing and adjusting the volume of the structure, the problem that the elasticity of the spring part is insufficient and unstable after the volume is reduced is solved, in the invention, a butterfly spring and a shaft check ring are arranged between a thrust seat and an adjusting sleeve, the requirement of reducing and adjusting the volume of the structure is met by utilizing the characteristic of low height of the butterfly spring, and meanwhile, the butterfly spring has the characteristics of large elasticity and stable elasticity;
6. after the adjusting sleeve and the conducting ring are assembled, the spring part is sleeved on the outer side of the adjusting sleeve, and a rectangular spring is adopted to realize one-way holding and reverse releasing; during assembly, when force is applied to the adjusting sleeve to enable the adjusting sleeve to rotate along the rotation direction of the spring part, the spring part tightly embraces the adjusting sleeve and the conducting ring, so that the rotation of the adjusting sleeve drives the conducting ring to rotate through the spring part, the adjusting nut is further driven to rotate, and the adjusting screw rod drives the moving part to move towards the direction of the static part so as to adjust the gap between the moving part and the static part; when force is applied to the adjusting sleeve to enable the adjusting sleeve to move reversely along the screwing direction of the spring part, the spring part is separated from the adjusting sleeve and the conducting ring, so that the adjusting nut is not driven to rotate any more, and the one-way adjustment of the gap between the moving part and the static part is realized; when the process is applied to the brake, the excessive clearance generated between the friction plate and the brake disc due to the friction between the friction plate and the brake disc can be eliminated when the brake is generated each time; in other words, each braking process comprises a process of moving the adjusting screw rod towards the brake disc by a distance which is the excessive clearance, and the spring part is separated from the adjusting sleeve and the conducting ring when the adjusting screw rod is in contact braking, so that the advancing distance of the adjusting screw rod is not recovered when the adjusting screw rod is in contact braking, and the unidirectional adjustment of the excessive clearance between the brake disc and the friction plate is realized.
Drawings
FIG. 1 is a sectional view showing a sectional structure of a one-way adjusting device for a structural gap according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view illustrating the structure of an adjusting nut in the adjusting device shown in FIG. 1;
FIG. 3 is a schematic view showing the structure of an adjusting screw in the adjusting device shown in FIG. 1;
FIG. 4 is a schematic view illustrating the structure of a thrust block in the adjustment device shown in FIG. 1;
FIG. 5 is a schematic view illustrating the structure of an adjustment sleeve in the adjustment device shown in FIG. 1;
FIG. 6 is a schematic view illustrating the structure of a conductive ring in the adjustment device shown in FIG. 1;
FIG. 7 is a cross-sectional view showing a cross-sectional structure in which the inner cavity of the conductive ring forms a spherical surface in the adjustment apparatus shown in FIG. 6;
FIG. 8 is a sectional view showing a sectional structure of a conductive ring having a tapered inner cavity in another preferred embodiment;
FIG. 9 is a sectional view showing a sectional structure of a conductive ring in which an inner cavity is formed to be flat in a further preferred embodiment;
FIG. 10 is a schematic view showing the configuration of the spring member in the adjustment device of FIG. 1;
FIG. 11 is an exploded view showing an exploded structure of the one-way gap adjustment apparatus of FIG. 1;
FIG. 12 is a state diagram showing a state structure in which the adjusting device shown in FIG. 1 is assembled with a pressure arm;
fig. 13 is a partial sectional view showing a state in which the latch member of the pressure arm is coupled with the latching groove of the adjustment sleeve in the state shown in fig. 12;
FIG. 14 is a diagram illustrating the condition of the adjustment apparatus of FIG. 1 before clearance is eliminated during actual operation;
fig. 15 is an operation diagram showing a state in which the adjusting device shown in fig. 14 eliminates the gap.
Detailed Description
An embodiment of a structural clearance unidirectional adjustment apparatus according to the present invention will be described with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
It should be noted that, in the embodiments of the present invention, the expressions "first" and "second" are used to distinguish two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and the descriptions thereof in the following embodiments are omitted.
In the preferred embodiment of the present invention, the structure clearance unidirectional adjustment device is matched with a driving member of a driving device during assembly, and the circumferential rotation of the driving device drives the rotation structure of the adjustment device to rotate, so that the adjustment rod in the rotation structure makes an axial linear motion. When the clearance needs to be eliminated, the adjusting rod moves towards the moving part, the moving part moves towards the static part, and the clearance between the moving part and the static part is eliminated, so that the clearance is eliminated.
Specifically, fig. 1 is a sectional view showing a sectional structure of the structural gap unidirectional adjusting apparatus according to a preferred embodiment of the present invention. Referring to fig. 1, in the embodiment of the present invention, the structural clearance unidirectional adjustment device includes an adjusting screw 1 and an adjusting nut 2, and the adjusting nut 2 and the adjusting screw 1 form an internal and external thread fit, that is, during assembly, the rotational movement of the adjusting nut 2 is converted into an axial linear movement of the adjusting screw 1 through the internal and external thread fit.
Fig. 2 is a schematic view illustrating the structure of an adjustment nut in the adjustment device shown in fig. 1. As shown in fig. 2, the adjusting nut 2 includes a sleeve 21 at the bottom for being sleeved with the adjusting screw 1 and a hexagonal head 22 formed at the top of the sleeve 21, and as can be seen from the drawing, a multi-stage table is formed on the hollow sleeve 21, wherein a circumferentially extending annular surface is formed on the outer side wall of the sleeve 21, and the annular surface is defined as a first assembling table 23. Fig. 3 is a schematic view showing the structure of an adjusting screw in the adjusting device shown in fig. 1. Referring to fig. 1 to 3, when the adjusting nut 2 and the adjusting screw 1 are assembled, the screw 11 of the adjusting screw 1 extends into the sleeve 21 and extends in the sleeve 21 until the base 12 of the adjusting screw 1 is limited by the inner surface of the first assembly surface 23. In addition, the bottom surface of the adjusting screw 1 is formed with an anti-rotation pin 13 extending vertically downward, and the anti-rotation pin 13 is used for abutting against the push plate.
The thrust seat is assembled after the adjusting screw rod 1 is sleeved into the sleeve 21 of the adjusting nut 2. Fig. 4 is a schematic view showing the structure of a thrust block in the adjusting apparatus shown in fig. 1. Referring to fig. 1 and 4, a first sleeve hole 31 adapted to the sleeve 21 of the adjusting nut 2 and penetrating through the thrust bearing 3 is formed in the center of the thrust bearing 3, and smooth second assembling table surfaces 32 are formed at the upper and lower openings of the first sleeve hole 31 and along the edges of the openings, when the thrust bearing 3 is assembled with the adjusting nut 2, the sleeve 21 of the adjusting nut 2 partially extends into the first sleeve hole 31 of the thrust bearing 3, and the second assembling table surfaces 32 of the thrust bearing 3 are attached to the first assembling table surfaces 23 on the adjusting nut 2, so that the assembly is completed. Referring to fig. 1, in the preferred embodiment, when the thrust bearing 3 is assembled, a screw gasket 4 may be additionally disposed between the thrust bearing 3 and the adjusting nut 2, the screw gasket 4 is attached to the second assembly table surface 32 on the same side of the thrust bearing 3, and separates the contact surfaces of the adjusting nut 2 and the thrust bearing 3 from each other, so as to reduce the friction between the two, thereby prolonging the service life of the adjusting nut 2 and the thrust bearing 3.
And after the thrust seat 3 is assembled, the adjusting set is assembled. Fig. 5 is a schematic view showing the structure of an adjustment sleeve in the adjustment device shown in fig. 1. Referring to fig. 5, the adjusting sleeve 5 is correspondingly formed with a second sleeve hole 51 which is matched with the sleeve 21 of the adjusting nut 2 and penetrates through the adjusting sleeve 5, meanwhile, the adjusting sleeve 5 comprises a first sleeve 52 and a second sleeve 53 which are integrally formed from bottom to top, the caliber size of the first sleeve 52 is set to be larger than that of the second sleeve 53, and then referring to fig. 5, a step structure is formed between the first sleeve 52 and the second sleeve 53, and the surface of the step structure is defined as a third assembly platform 54. Next, referring to fig. 5, a radially recessed slot 55 is formed on the first shaft sleeve 52, when the assembly is assembled, the slot 55 is used for connecting with a driving member of a driving device, and a width of a slot of the slot 55 needs to be set to be larger than a diameter of the driving member. As mentioned above, in the process of "the adjusting device is rotated by the circumferential rotation of the pressure arm so that the adjusting rod in the adjusting device makes an axial linear motion", the motion of the driving member in the adjusting sleeve is substantially the reciprocating motion of the driving member in the locking slot 55, and the movement of the driving member is limited by two sides of the slot opening of the locking slot 55. When the adjusting sleeve 5 is assembled, the bottom surface of the adjusting sleeve 5 is in contact with the second assembly table surface 32 of the thrust block 3, referring back to fig. 1, in order to achieve the technical effect of reducing the overall volume of the adjusting structure, in the preferred embodiment, the belleville spring 6 and the shaft check ring 7 are additionally arranged at the second assembly table surface 32 where the adjusting sleeve 5 is in contact with the thrust block 3, the belleville spring 6 and the shaft check ring 7 are clamped with a notch (not shown) formed on the adjusting nut 2, and during assembly, the belleville spring 6 is limited and compressed by the shaft check ring 7 and the adjusting nut 2, so that the belleville spring 6 forms resistance to the movement between the adjusting nut 1 and the thrust block 3. The shaft retainer ring 7 plays a role in supporting the adjusting sleeve 5, the requirement of reducing the size of the adjusting structure is met by utilizing the characteristic of low height of the belleville spring 6, and meanwhile, the belleville spring 6 has the characteristics of large elasticity and stable elasticity, so that the elasticity can be still ensured by the belleville spring after the size of the adjusting structure is reduced.
The adjustment sleeve 5 is fitted with a conductive ring, and fig. 6 is a schematic view showing the structure of the conductive ring in the adjustment device shown in fig. 1. Referring to fig. 1 and 6, a third sleeve hole 81 is formed at the center of the conductive ring 8 and is adapted to the second sleeve 53 of the adjusting sleeve 5, so that when the conductive ring 8 is assembled with the adjusting sleeve 5, the conductive ring 8 passes through the sleeve 21 of the adjusting nut 2 through the third sleeve hole 82 to be sleeved on the sleeve of the adjusting nut 2, and referring to fig. 1, the inner cavity opening of the conductive ring 8 is in contact with the edge position of the top surface 24 of the sleeve 21 at the top of the adjusting nut 2 and is abutted against the edge position of the top surface 24 of the sleeve, so that the top surface 24 of the sleeve jacks up the conductive ring 8, so that the conductive ring 8 is located above the second sleeve 53 of the adjusting sleeve 5 and has a gap with the surface of the second sleeve 53. Fig. 7 is a sectional view showing a sectional structure of an inner cavity of the conductive ring shown in fig. 6. Referring to fig. 7, a circumferentially extending flange 83 is formed on the inner cavity wall 82 at the upper end opening of the conductive ring 8, and referring to fig. 1, when assembling and forming, a spherical section is formed between the flange 83 and the inner cavity wall 82 of the conductive ring 8, and when the conductive ring 8 is fitted to the adjusting nut 2, the section is a contact surface of the conductive ring 8 and the top surface 24 of the sleeve 21 of the adjusting nut 2, taking the preferred embodiment as an example, the adjusting sleeve 5 rotates to drive the conductive ring 8 to rotate, and meanwhile, in the inner cavity of the conductive ring 8, the section formed between the flange 83 and the inner cavity wall 82 is in contact with the top surface 24 of the sleeve 21 of the adjusting nut 2, and the adjusting nut 2 is driven to rotate by friction force generated by contact extrusion during rotation, and further, the adjusting screw 1 fitted to the thread of the adjusting nut 2 moves axially. Fig. 8 and 9 show cross-sectional structures of conductive rings in two other preferred embodiments of the present invention, respectively. In fig. 8, the section formed between the wall of the lumen of the conductive ring 8 and the flange 83 is a tapered surface, while in fig. 9, the section formed between the wall of the lumen of the conductive ring 8 and the flange 83 is a right-angled plane. In the invention, the tangent plane between the inner cavity wall 82 of the conductive ring 8 and the flange 83, that is, the contact surface between the conductive ring 8 and the adjusting nut 2 is designed to be a spherical surface, a conical surface or a right-angle plane, so as to make the angular contact between the inner cavity wall 82 of the conductive ring 8 and the adjusting nut 2 more stable, that is, when the conductive ring 8 rotates, the friction force generated by the contact between the circumferentially extending flange 83 and one end of the adjusting nut 2 is more stable, thereby ensuring the stability of the conductive ring driving the adjusting nut to rotate and further generating braking.
After the adjusting sleeve 5 and the conducting ring 8 are assembled, a spring part is sleeved outside the whole formed by the adjusting sleeve 5 and the conducting ring 8. Fig. 10 is a schematic view showing the structure of a spring member in the adjusting device shown in fig. 1. In this embodiment of the invention, the spring element 9 shown in fig. 10 is fitted over the entire outer sleeve formed by the adjustment sleeve 5 and the guide ring 8. Meanwhile, referring back to fig. 1, the top of the conductive ring 8 is pressed by the compression spring 10 and the pressing pad 20, and finally the adjusting pad 30 is arranged on the top of the compression spring 10 to press the compression spring 10 and the pressing pad 20, so that the assembly is completed. After assembly of the assembly, the adjustment device is formed as shown in fig. 1, and fig. 11 is an exploded view showing an exploded structure of the structural gap unidirectional adjustment device shown in fig. 1, so that the component composition and assembly sequence of the adjustment device can be seen in comparison with fig. 1 and 11.
The following describes the operation process of the one-way gap adjusting device with the structure according to the present invention, with reference to the accompanying drawings, when the one-way gap adjusting device is applied to a vehicle brake, taking the adjustment of the gap between a brake disc and a friction plate as an example. Fig. 12 is a state diagram showing a state structure in which the adjusting device shown in fig. 1 is assembled with a pressure arm. Fig. 13 is a partial sectional view showing a state in which the latch piece of the pressure arm is coupled with the catching groove of the adjustment sleeve in the state shown in fig. 12. Referring to fig. 12 and 13, the adjustment structure 100 is abutted with the pressure arm 200 of the brake after assembly, as shown in fig. 13, the pressure arm 200 includes a latch member 201, which is inserted into the slot 55 formed on the first sleeve 52 of the adjustment sleeve 5 as described above, and since the width of the slot 55 is larger than the diameter of the latch member 201, the latch member 201 can move in the slot 55 along with the rotation of the pressure arm 200 and is limited by the slot walls on both sides of the slot 55.
For example, when braking is required, the gap preset by the adjusting structure is eliminated first. Referring to fig. 12, in the initial state, the latch 201 of the pressure arm 200 is attached to one side of the slot 55, and when the working condition starts, the pressure arm 200 is turned over in the direction perpendicular to the direction of the spring rotation toward the side away from the latch 201, the latch 201 moves from one side wall to the other side wall in the slot 55, and the adjustment structure 100 assembly is driven to move toward the side away from the pressure arm 200 under the action of the eccentricity of the pressure arm 200. In the process of eliminating the preset interval of the adjusting structure, the latch member 201 moves from one side wall in the slot 55 to the other side wall of the slot 55 along the arc track in the direction away from the second shaft sleeve 53 of the adjusting sleeve 5 until the latch member is attached to the other side wall of the slot 55, and correspondingly, in the process, the adjusting structure 100 also moves by the preset displacement in the direction away from the pressure arm 200.
Fig. 14 is a diagram illustrating a state before the adjusting device shown in fig. 1 removes the gap in an actual operating condition. Fig. 15 is an operation diagram showing a state in which the adjusting device shown in fig. 14 eliminates the gap. As described above, the thickness between the disc 300 and the friction plate 400 is reduced by friction between them at each time of braking, and it is not hard to imagine that, since the thickness is reduced, the interval between the disc 300 and the friction plate 400 is enlarged by repeated braking because of the opposite arrangement of the two, that is, an excessive clearance is generated. Obviously, when excessive clearance is generated, braking is generated according to the original working condition, so that the braking reaction delay is inevitably brought, or the generated braking force is insufficient. This embodiment of the invention is made to eliminate this excess gap. Referring to fig. 14, after the preset gap of the adjusting structure is eliminated in the previous operating condition, a gap still exists between the brake disc 300 and the friction disc 400 of the brake, and the gap, that is, an excessive gap, is set as the first gap 301 and the second gap 302, respectively, with respect to the brake disc 300, at the same time, in the adjusting structure 100, the adjusting screw 1 is tightly attached to the pushing plate 500 and the friction disc 400 of the brake, and since the pushing plate 500 is in the state of fig. 14 and has a gap with the brake disc 300, that is, the brake disc 300 does not generate braking at this time. At this time, the pressure arm 200 continues to rotate, and drives the adjusting sleeve to rotate along the same direction as the spring element 9, and then the spring element 9 which is further compressed holds the adjusting sleeve 5 and the conducting ring 8 therein, so that the pressure arm 200 drives the adjusting sleeve 5 to rotate, and the conducting ring 8 can be driven to rotate through the spring element 9. Next, referring to fig. 1 and 15, in the adjustment structure, the pressing washer 20 presses the pressing spring 10, thereby applying a pressing force to the conductive ring 8 to press the adjustment nut 2. In the process, the tangent plane formed between the cavity wall 82 of the inner cavity of the conduction ring 8 and the flange and the nut of the adjusting nut 2 generate friction force, and the adjusting nut 2 is driven by the friction force to rotate synchronously with the conduction ring 8, so the conduction ring 8 further transmits the rotation to the adjusting nut 2 through the top surface edge 24 of the sleeve 21 contacted with the tangent plane of the inner cavity of the conduction ring 8, thereby driving the adjusting screw rod 1 to rotate, and the anti-rotation pin 13 on the adjusting screw rod 1 is matched with the pushing plate, thereby the adjusting nut 2 which is matched with the thread can not rotate further to drive the adjusting screw rod 1 to convert the rotation motion into the axial motion, namely the motion towards the direction of the brake disc. Then, during the linear motion of the adjusting screw 1, the pushing plate 500 is driven to press the friction plate 400, and the friction plate 400 moves toward the brake disc 300 until the surface of the friction plate 400 presses the surface of the brake disc 300, i.e. the gap between the friction plate 400 and the brake disc 300 is eliminated, so as to generate braking.
Under the next working condition, when the brake needs to be released, the pressure arm 200 rotates, the bolt piece 201 on the pressure arm 200 returns to the initial position from the current position in the clamping groove 55, the adjusting sleeve 5 also rotates due to no longer being pressed, at this time, the whole formed by the adjusting sleeve 5 and the conducting ring 8 is separated from the spring piece 9, correspondingly, the whole formed by the adjusting sleeve 5 and the conducting ring does not transmit torque to the adjusting nut 2 any more, and therefore, the adjusting nut 2 does not enable the adjusting screw 1 to return to the previous position, and therefore the excessive clearance between the brake disc 300 and the friction plate 400 is eliminated based on the complete process.
It should be noted that, under the working condition shown in fig. 15, if the pressure arm 200 is continuously rotated, the latch member 201 of the pressure arm 200 abuts against the side wall of the engaging groove 55, so that the adjusting sleeve 5 is continuously driven to rotate, however, the friction force generated between the adjusting sleeve 5 and the adjusting nut 2 cannot drive the adjusting screw 1 to further rotate, and therefore the adjusting sleeve 5 and the adjusting nut 2 start to slip, so that the overload friction force acting on the adjusting nut 2 can be eliminated, and the adjusting structure 100 assembly is protected from being damaged.
Compared with the prior art, the invention has the following beneficial technical effects due to the adoption of the technical scheme:
1. the simple linear motion of a brake adjusting rod in the prior art is improved into the simple linear motion of the brake adjusting rod matched with an adjusting nut through threads, and the adjusting nut rotates to drive the adjusting screw to move axially, so that the linear motion of the adjusting screw is improved into the axial motion driven by rotation, when braking is needed, the adjusting nut rotates to drive the adjusting screw to move towards a pushing plate of the brake, the pushing plate is enabled to be tightly attached to a friction plate and then move towards a brake disc, and a gap between the friction plate and the brake disc is eliminated, so that braking is realized;
2. the gap adjusting structure with the structure has the advantages that the gap adjusting structure can reduce the movement thread in the adjusting process, reduce the adjusting force required by gap adjustment, correspondingly, reduce the movement thread in the adjusting process, namely reduce the volume of the adjusting structure, and enable the structure to be more compact, so that the new requirement of the air braking technology on the whole volume of the mechanism is met;
3. the adjusting sleeve is provided with a clamping groove which is radially sunken, so that relative movement between the pressure arm and the adjusting sleeve is realized by inserting a plug piece of the pressure arm into the clamping groove of the adjusting sleeve, the movement of the plug piece in the clamping groove is limited by the side walls on two sides of the clamping groove, meanwhile, the adjusting sleeve comprises a first shaft sleeve and a second shaft sleeve which are integrally formed from bottom to top, and a non-communicated structure is arranged between the clamping groove and the second shaft sleeve, so that when a spring part is sleeved on the adjusting sleeve and the transmission ring, the spring part can be ensured to freely rotate on the surface of the adjusting sleeve without generating clamping stagnation, and the service life of the spring part is obviously prolonged;
4. in the invention, the contact surface is designed into a spherical surface, a conical surface or a right-angle plane, so that the angular contact between the inner cavity wall of the conductive ring and the adjusting nut is more stable, namely, when the conductive ring rotates, the friction force generated by the contact of the circumferential flange and one end of the adjusting nut is more stable, thereby ensuring the stability of the conductive ring driving the adjusting nut to rotate so as to generate braking;
5. in order to achieve the purpose of reducing and adjusting the volume of the structure, the problem that the elasticity of the spring part is insufficient and unstable after the volume is reduced is solved, in the invention, a butterfly spring and a shaft check ring are arranged between a thrust seat and an adjusting sleeve, the requirement of reducing and adjusting the volume of the structure is met by utilizing the characteristic of low height of the butterfly spring, and meanwhile, the butterfly spring has the characteristics of large elasticity and stable elasticity;
6. after the adjusting sleeve and the conducting ring are assembled, the spring part is sleeved on the outer side of the adjusting sleeve, the rectangular spring is adopted to realize one-way holding and reverse releasing, during assembly, when force is applied to the adjusting sleeve to enable the adjusting sleeve to rotate along the rotation direction of the spring part, the spring part holds the adjusting sleeve and the conducting ring tightly, so that the rotation of the adjusting sleeve drives the conducting ring to rotate through the spring part, the adjusting nut is further driven to rotate, and then the adjusting screw rod drives the friction plate to move towards the brake disc through the pushing plate to adjust the gap between the friction plate and the brake disc; when force is applied to the sleeve set to enable the adjusting sleeve to move reversely along the screwing direction of the spring part, the spring part is separated from the adjusting Orchion conducting ring, so that the adjusting nut is not driven to rotate any more; when the process is applied to the brake, the excessive clearance generated between the friction plate and the brake disc due to the friction between the friction plate and the brake disc can be eliminated when the brake is generated each time; in other words, each braking process comprises the step of moving the adjusting screw rod towards the brake disc by a distance which is the excessive clearance, and the spring part is separated from the adjusting sleeve and the conducting ring when the adjusting screw rod is in contact braking, so that the advancing distance of the adjusting screw rod is not recovered when the adjusting screw rod is in contact braking, and the unidirectional adjustment of the excessive clearance between the brake disc and the friction plate is realized.
The present invention has been described in detail, and the embodiments are only used for understanding the method and the core idea of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and to implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A unidirectional adjustment device for structural clearances, the adjustment device comprising:
the rotating structure is formed by sleeving an adjusting screw rod on an adjusting nut;
the thrust seat is sleeved on the rotating structure;
the adjusting sleeve is sleeved with the rotating structure as a stress structure;
a conductive ring sleeved with the rotating structure and abutting against the top of the rotating structure,
the spring part is arranged on the outer sides of the adjusting sleeve and the conducting ring, when the adjusting sleeve is stressed and moves in the same direction as the rotating direction of the spring part, the spring part tightly embraces the adjusting sleeve and the conducting ring, so that the adjusting sleeve rotates to drive the conducting ring to rotate through the spring part, and the rotating structure rotates; when the adjusting sleeve is stressed and moves in the direction opposite to the rotating direction of the spring piece, the spring piece is separated from the adjusting sleeve and the conducting ring, and the rotating structure stops rotating.
2. The device as claimed in claim 1, wherein the adjusting screw is sleeved in the adjusting nut and is in threaded connection with the adjusting nut, so that the adjusting nut rotates to drive the adjusting screw to rotationally move axially.
3. The one-way structural gap adjusting device according to claim 2, wherein the adjusting sleeve comprises a first sleeve and a second sleeve which are integrally formed from bottom to top, the radius of the first sleeve is larger than that of the second sleeve, the first sleeve and the second sleeve form a step structure, and a non-communication structure is arranged between the clamping groove and the second sleeve, wherein,
a radially recessed clamping groove is formed in the first shaft sleeve, the driving piece is inserted into the clamping groove, the width of the driving piece is smaller than that of the clamping groove, and then the driving piece reciprocates in the clamping groove and is limited by the notch of the clamping groove.
4. The one-way adjusting device for structural clearance according to claim 3, wherein an annular assembly table is formed on the adjusting nut and is defined as a first assembly table, the thrust block is sleeved with the adjusting nut, one side surface of the thrust block is attached to the first assembly table, the adjusting sleeve and the conducting ring are sequentially sleeved with the adjusting nut,
the spring part with the adjusting sleeve with the conduction ring cover is established, and when the conduction ring with the adjusting nut cover was established, the conduction ring inner wall face with the top of adjusting nut offsets to make the conduction ring with leave the clearance between the top of adjusting sleeve.
5. The device for unidirectional adjustment of structural clearance according to claim 4, wherein a circumferential flange is formed on the inner cavity wall of the conductive ring at a position opened at one end, and a tangent plane formed between the circumferential flange and the inner cavity wall of the conductive ring is in contact with one end of the adjusting nut,
when the adjusting sleeve rotates, the conducting ring is driven to rotate through the spring piece, and a tangent plane formed between the circumferential flange and the inner cavity wall is in contact extrusion with one end of the adjusting nut to generate friction force, so that the adjusting nut rotates.
6. The device for unidirectional adjustment of structural clearance of claim 5, wherein a tangent plane formed between the circumferential flange and the inner cavity wall is a spherical surface, a conical surface or a flat surface.
7. The one-way structural gap adjusting device of claim 6, wherein a screw gasket is arranged between the adjusting nut and the thrust seat, and the thrust seat is attached to the first assembling table surface of the adjusting nut and compresses the screw gasket.
8. The one-way structural gap adjustment device of claim 7, wherein an end of the adjusting nut near the adjusting sleeve and the conductive ring is provided with an adjusting gasket, a compression spring and a compression gasket, wherein,
the compression gasket is located the conduction ring with between the pressure spring, compression gasket, pressure spring with the adjusting shim overlaps in order and locates on the adjusting nut, just, the pressure spring will the compression gasket with the conduction ring compresses tightly, so that the conduction ring with adjusting nut closely laminates.
9. The one-way structural gap adjusting device as claimed in claim 8, further comprising a belleville spring and a shaft retainer ring between the thrust seat and the adjusting sleeve, wherein,
the shaft check ring is positioned between the butterfly spring and the adjusting sleeve and clamped with the adjusting nut, and the butterfly spring is limited and compressed by the shaft check ring and the adjusting nut, so that the butterfly spring forms resistance to the movement between the adjusting nut and the thrust seat.
10. The one-way structural gap adjusting device as claimed in claim 1, wherein the bottom surface of the adjusting screw is formed with an anti-rotation pin extending vertically downward, the anti-rotation pin being inserted into the push plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010488545.7A CN111637178A (en) | 2020-06-02 | 2020-06-02 | One-way adjusting device of structural clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010488545.7A CN111637178A (en) | 2020-06-02 | 2020-06-02 | One-way adjusting device of structural clearance |
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| CN111637178A true CN111637178A (en) | 2020-09-08 |
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| CN202010488545.7A Pending CN111637178A (en) | 2020-06-02 | 2020-06-02 | One-way adjusting device of structural clearance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112792583A (en) * | 2020-12-30 | 2021-05-14 | 浙江欣兴工具有限公司 | Displacement adjusting mechanism of magnetic seat drilling machine |
-
2020
- 2020-06-02 CN CN202010488545.7A patent/CN111637178A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112792583A (en) * | 2020-12-30 | 2021-05-14 | 浙江欣兴工具有限公司 | Displacement adjusting mechanism of magnetic seat drilling machine |
| CN112792583B (en) * | 2020-12-30 | 2022-02-22 | 浙江欣兴工具有限公司 | Displacement adjusting mechanism of magnetic seat drilling machine |
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