CN216580476U - Threaded transmission assembly and brake booster - Google Patents
Threaded transmission assembly and brake booster Download PDFInfo
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- CN216580476U CN216580476U CN202123270500.1U CN202123270500U CN216580476U CN 216580476 U CN216580476 U CN 216580476U CN 202123270500 U CN202123270500 U CN 202123270500U CN 216580476 U CN216580476 U CN 216580476U
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Abstract
The utility model discloses a screw thread drive assembly and brake booster, screw thread drive assembly includes: a screw housing portion; the screw rod part is arranged in the screw sleeve part in a penetrating way and is in threaded fit with the screw sleeve part, and one end of the screw rod part is provided with a guide anti-rotation part; and the elastic piece is positioned between the screw sleeve part and the guide rotation preventing part and is suitable for elastically abutting against the screw sleeve part. According to the utility model discloses screw drive subassembly prevents changeing through setting up the elastic component between portion at swivel nut portion and direction for the elastic component can cushion screw rod portion effectively and roll back the in-process direction and prevent the impact force between portion and the swivel nut portion, and reduce the direction and prevent the inertia moment of torsion of portion, prevent to appear the direction and prevent changeing portion and screw rod portion and be connected cracked problem, promote the product competitiveness.
Description
Technical Field
The utility model belongs to the technical field of the vehicle manufacturing technique and specifically relates to a screw thread drive assembly and brake booster who has this screw thread drive assembly are related to.
Background
In the related art, a mechanical structure for converting a rotational motion of a motor into a linear thrust motion is commonly used in a brake boosting system of a motor vehicle, especially an electronic brake boosting system. Wherein, the screw thread transmission structure of lead screw thread insert form possesses the transmission efficiency height, arranges that the space is little, advantage such as with low costs, is the preferred structure of straight line thrust structure. In a screw-threaded linear thrust structure, a component (a guide rotation-preventing mechanism) is generally required to be designed, wherein the component is fixedly connected with a screw rod and prevents the screw rod from rotating. When the motor gear works and drives the threaded sleeve to rotate, the screw rod cannot rotate along with the threaded sleeve due to the anti-rotation mechanism, but can realize linear motion under the action of the threaded structure.
When the brake is released, the linear thrust structure retreats to the initial position under the action of the pressure of the main cylinder and the rebound force of the return spring. And when the screw sleeve is retreated to the initial position, the guide anti-rotation mechanism is attached to the end face of the screw sleeve and generates interaction impact force. Because the gear transmission system has motion inertia, the transmission system can continuously twist the screw rod through the thread structure of the thread sleeve. The screw rod is fixedly connected with the guide rotation-preventing mechanism, and the guide rotation-preventing mechanism cannot rotate due to the limitation of other parts. Therefore, the fixed connection part of the guiding rotation-preventing mechanism, the guiding rotation-preventing mechanism and the screw rod can be acted by the moment of inertia torque. The damage of the guide rotation-preventing mechanism or the fixed connection part of the guide rotation-preventing mechanism and the screw rod can occur under the repeated rollback impact and the inertia torque action, and an improved space exists.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a screw drive assembly, can solve the direction effectively and prevent that the mechanism is prevented changeing or the direction prevents changeing the problem that the mechanism and screw rod fixed connection position damaged, this screw drive assembly's stability.
According to the utility model discloses screw drive subassembly, include: a screw housing portion; the screw rod part is arranged in the screw sleeve part in a penetrating way and is in threaded fit with the screw sleeve part, and one end of the screw rod part is provided with a guide anti-rotation part; and the elastic piece is positioned between the screw sleeve part and the guide rotation preventing part and is suitable for elastically abutting against the screw sleeve part.
According to the utility model discloses screw drive subassembly prevents changeing through setting up the elastic component between portion at swivel nut portion and direction for the elastic component can cushion screw rod portion effectively and roll back the in-process direction and prevent the impact force between portion and the swivel nut portion, and reduce the direction and prevent the inertia moment of torsion of portion, prevent to appear the direction and prevent changeing portion and screw rod portion and be connected cracked problem, promote the product competitiveness.
According to some embodiments of the present invention, the screw drive assembly further comprises a spring member disposed between the screw portion and the screw portion.
According to some embodiments of the threaded drive assembly of the present invention, the end surface of the screw sleeve portion facing the guide rotation preventing portion is provided with a mounting bearing; one end of the elastic piece is suitable for abutting against the guide rotation preventing part, and the other end of the elastic piece is suitable for abutting against the mounting bearing.
According to some embodiments of the screw drive assembly of the present invention, an end surface of the screw sleeve portion facing the guide rotation preventing portion is provided with a mounting sink, and the mounting bearing is configured as a needle bearing; one axial end of the needle bearing is embedded into the mounting sunken groove, and the other axial end of the needle bearing is suitable for abutting against the other end of the elastic piece.
According to the utility model discloses some embodiments's screw drive assembly in the axial of screw rod portion, needle bearing's the axial other end is less than swivel nut portion orientation the terminal surface of the portion of preventing changeing of direction.
According to the utility model discloses some embodiments's screw drive assembly still includes: the support frame, the support frame with the elastic component links to each other, just the support frame is used for linking to each other with mounting structure.
According to the utility model discloses the screw drive subassembly of some embodiments, the support frame is located the direction prevents that commentaries on classics portion deviates from one side of spiro union portion, just the support frame is through running through the support column of the portion is prevented changeing in the direction with the elastic component links to each other.
According to the utility model discloses the screw drive subassembly of some embodiments, the support column is a plurality of, and is a plurality of the support column encircles screw rod portion distributes.
According to some embodiments of the invention, the threaded drive assembly further comprises a spring member configured to be coupled to the threaded member.
The utility model also provides a brake booster.
According to the utility model discloses brake booster is provided with any kind of above-mentioned embodiment the screw drive assembly.
The advantages of the brake booster and the threaded transmission assembly are the same as those of the prior art, and are not described in detail herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a threaded drive assembly according to some embodiments of the present invention.
Fig. 2 is a threaded drive assembly according to further embodiments of the present invention.
Reference numerals:
the screw drive assembly 100 is provided with a threaded drive member,
a screw sleeve part 1, a threaded hole 11, a tooth structure 12, a screw rod part 2, a guide rotation-preventing part 3,
a coil spring 41, a mounting sink 42, a mounting bearing 43,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
The following describes a screw transmission assembly 100 according to an embodiment of the present invention with reference to fig. 1 to 2, and an elastic member is provided between the screw sleeve portion 1 and the guide rotation preventing portion 3 of the screw transmission assembly 100, so that the guide rotation preventing portion 3 and the screw portion 2 contact the screw sleeve portion 1 after the backspacing, thereby effectively buffering the impact force of the guide rotation preventing portion 3, reducing the inertia torque, and improving the connection stability and safety of the guide rotation preventing portion 3 and the screw portion 2.
As shown in fig. 1-2, a screw drive assembly 100 according to an embodiment of the present invention includes: a screw sleeve part 1, a screw rod part 2 and an elastic piece. It should be noted that the threaded drive assembly 100 of the present invention is applicable to a brake booster.
Screw portion 2 wears to locate screw portion 1, and the periphery wall of screw portion 2 is equipped with the external screw thread promptly, simultaneously, is equipped with screw hole 11 in screw portion 1, and screw portion 2 runs through screw hole 11, forms lead screw mechanism, and as shown in fig. 1 and fig. 2, is equipped with the direction in one section of screw portion 2 and prevents changeing portion 3, and the direction is prevented changeing portion 3 and is used for preventing screw portion 2 along with changeing with it in screw portion 1 pivoted in-process.
Wherein, the utility model provides a when screw drive assembly 100 is applicable to brake booster, the periphery wall of swivel nut portion 1 is equipped with tooth structure 12, and the output gear meshing of swivel nut portion 1 and brake booster's motor, so that when motor output drive power, swivel nut portion 1 can rotate for lead screw portion, and screw portion 2 prevents with the direction that the portion 3 links to each other that changes, the portion 3 is prevented changeing by the direction is circumference fixed knot structure, so that when motor drive swivel nut portion 1 rotates, screw portion 2 prevents changeing the prevention effect of portion 3 along the axial displacement of swivel nut portion 1 down in the direction, realize that the motor rotates and turn into linear thrust motion. And the screw part 2 is connected with a master cylinder of the brake booster and a return spring, so that when the motor finishes braking and releases braking force, the screw part 2 retreats under the acting force of the master cylinder and the return spring.
The elastic element is positioned between the screw sleeve part 1 and the guide rotation-preventing part 3 and is suitable for being pressed against the screw sleeve part 1. Thus, when the brake is released, the screw portion 2 and the rotation preventing guide portion 3 are retracted to the initial positions by the master cylinder pressure and the return spring repulsive force. And in the process of backing, the elastic part is positioned between the screw sleeve part 1 and the guide rotation preventing part 3 so that the elastic part firstly generates elastic extrusion force with the screw sleeve part 1 to buffer the impact generated between the guide rotation preventing part 3 and the screw sleeve part 1, buffer the impact force of the backing of the guide rotation preventing part 3 and reduce the inertia torque, prevent the problem of the connection fracture of the guide rotation preventing part 3 and the screw rod part 2, and improve the structural stability and the safety of the thread transmission assembly 100.
The elastic piece can be in the form of various spring structures, various rubber structures and assemblies containing various springs or various rubbers, and the structure is flexibly arranged and can be selected.
According to the utility model discloses threaded transmission subassembly 100 prevents changeing the portion 3 between through at swivel nut portion 1 and direction for the elastic component can cushion screw portion 2 effectively and roll back the in-process direction and prevent changing the impact force between portion 3 and the swivel nut portion 1, and reduce the direction and prevent changeing the inertia moment of portion 3, prevent to appear the direction and prevent changeing portion 3 and screw portion 2 and be connected cracked problem, promote the product competitiveness.
In some embodiments, the elastic member is configured as an annular member, for example, configured as an annular ring, and the elastic member is sleeved outside the screw portion 2, so that the elastic member can play a role of buffering the rotation preventing guide portion 3 and the screw portion 1 at each position in the circumferential direction of the screw portion 2, and ensure that each position in the circumferential direction of the rotation preventing guide portion 3 does not directly make rigid contact with the screw portion 1, thereby improving the structural stability between the rotation preventing guide portion 3 and the screw portion 2.
And, screw rod portion 2 wears to locate the elastic component to make screw rod portion 2 can radially play spacing effect to the elastic component, when screw rod portion 2 and direction were prevented that portion 3 rotated for screw sleeve portion 1 motion, the elastic component can be located the direction all the time and prevent rotating between portion 3 and screw sleeve portion 1, avoids appearing the condition that the elastic component breaks away from screw rod portion 2, improves the installation stability of elastic component.
In some embodiments, the end surface of the screw sleeve portion 1 facing the guide rotation-preventing portion 3 is provided with a mounting bearing 43, and it should be noted that the mounting bearing 43 includes two rotating portions and a ball located between the two rotating portions. In this way, during specific installation, one rotating portion of the installation bearing 43 may be fixed to the end face of the guide rotation-preventing portion 3, and the other rotating portion may be disposed toward the elastic member, and in the axial direction of the screw portion 2, the other rotating portion, the elastic member and the guide rotation-preventing portion 3 are aligned, so that when the guide rotation-preventing portion 3 moves axially relative to the screw housing portion 1, one end of the elastic member is adapted to abut against the guide rotation-preventing portion 3, and the other end is adapted to abut against the installation bearing 43.
Like this, can make the elastic component can prevent the effect that changes 3 and the screw sleeve portion 1 between play the elasticity buffering in the direction, avoid appearing the direction and prevent the problem of changing 3 and the rigid contact of screw sleeve portion 1, and through setting up installation bearing 43, can rotate the relative rotation of portion through two, prevent that the tip of elastic component from forming rigid contact to the terminal surface of screw sleeve portion 1, guarantee the stable in structure of screw transmission subassembly 100, and do benefit to and reduce the direction and prevent the inertia moment of torsion of changing 3.
In some embodiments, as shown in fig. 1, an end surface of the screw housing portion 1 facing the guide rotation-preventing portion 3 is provided with a mounting sunken groove 42, and the mounting sunken groove 42 is recessed in an axial direction on the end surface of the screw housing portion 1 to form a mounting space for mounting the bearing 43.
The mounting bearing 43 in this embodiment may be configured as a needle bearing, i.e., the two rotating parts of the mounting bearing 43 are distributed in sequence in the axial direction, and the balls between the two rotating parts serve as axial rolling support. And in the specific installation, one axial section of the needle bearing is embedded in the installation sunken groove 42, and the other axial end of the needle bearing is suitable for abutting against the other end of the elastic piece. Namely, one rotating part of the needle bearing is embedded into the mounting sunken groove 42 and is relatively fixed with the screw sleeve part 1, and the other rotating part is used for abutting against the elastic part, so that the buffering effect of the elastic part is realized.
In some embodiments, the other axial end of the needle bearing is lower than the end face of the screw sleeve portion 1 facing the guide rotation-preventing portion 3, that is, after the needle bearing is fixedly installed in the installation sunken groove 42, both rotation portions of the needle bearing are completely located in the installation sunken groove 42, and when finally elastically pressed, one end of the elastic member extends into the installation sunken groove 42 to elastically press against the needle bearing. Thus, the mounting bearing 43 can be stably positioned in the mounting sinking groove 42, and the elastic member can be effectively pressed against the mounting bearing 43.
In some embodiments, the threaded drive assembly 100 further comprises: the supporting frame 52, the supporting frame 52 is connected with the elastic member, i.e. the elastic member and the supporting frame 52 can transmit impact force. In this way, in the process of retracting the guide rotation preventing part 3, the elastic member is firstly contacted with the screw sleeve part 1, and the impact force applied to the elastic member can be transmitted to the support frame 52, so that the impact force can be diffused.
Wherein, support frame 52 is used for linking to each other with mounting structure, and if mounting structure is return spring and surrounding casing, like this, the impact force that the elastic component received can transmit return spring and surrounding casing through support frame 52, reduces the impact force that the portion 3 that prevents changeing of direction received, and then does benefit to and improves the stability of being connected of portion 3 and screw rod portion 2 is prevented changeing in the direction.
In some embodiments, the support frame 52 is located the direction and prevents that the portion 3 deviates from one side of the screw sleeve portion 1 that changes, and the support frame 52 prevents through running through the direction that the support column 53 of the portion 3 changes and link to each other with the elastic component, promptly the utility model provides a each part of screw drive assembly 100 distributes along the axial of screw rod portion 2, does benefit to and reduces the space that screw drive assembly 100 radially occupied, reduces the whole space that occupies.
Wherein, prevent revolving support 52 and elastic component to link to each other through the support column 53 that runs through direction and prevent revolving support 3 to when swivel nut portion 1 and elastic component contact, the impact force can be followed the axial of screw rod portion 2 and transmitted from elastic component, support column 53 and support frame 52 in proper order, thereby realize the effective buffering to the impact force, and then reduce the impact force that direction rotation prevention portion 3 received.
In some embodiments, the supporting column 53 is multiple, and the multiple supporting columns 53 are distributed around the screw portion 2, that is, the multiple supporting columns 53 are sequentially distributed in the circumferential direction of the screw portion 2, so that the elastic member can be spread to the supporting frame 52 through the multiple supporting columns 53 at the same time when subjected to the impact force.
As shown in fig. 2, the number of the supporting columns 53 is 4, and the supporting columns are uniformly distributed in the circumferential direction of the screw rod part 2 at intervals, so that the elastic part is uniformly diffused by impact force, the problem that the elastic part is locally stressed unevenly to cause overall inclination in the compression process is avoided, and the elastic part is ensured to be capable of effectively buffering the impact force.
Two specific embodiments of the present application of the threaded drive assembly 100 are described below in conjunction with fig. 1 and 2.
In the first embodiment, as shown in fig. 1, the rotation preventing guide portion 3 is provided at the upper end of the screw portion 2, and the outer peripheral wall of the screw housing portion 1 is provided with the tooth structure 12 for engagement with the tooth structure of the motor, and the screw housing portion 1 is provided with the mounting recessed groove 42 at the end surface facing the rotation preventing guide portion 3, and the mounting recessed groove 42 can be used for mounting the needle bearing.
Here, an elastic member is sleeved outside the screw part 2, and the elastic member is configured as a coil spring 41, and the coil spring 41 is located between the guide rotation preventing part 3 and the mounting bearing 43. In this way, in the process of retracting the screw portion 2, the coil spring 41 can elastically abut against between the rotation-preventing guide portion 3 and the mounting bearing 43 to play a role of buffering, so as to avoid the problem that the rotation-preventing guide portion 3 is connected with the screw portion 2 and is broken.
In the second embodiment, as shown in fig. 2, the rotation preventing guide portion 3 is provided at the upper end of the screw portion 2, and the outer peripheral wall of the screw housing portion 1 is provided with the tooth structure 12 for engagement with the tooth structure of the motor, and the screw portion 2 penetrates the screw housing portion 1.
Wherein, the screw part 2 is externally sleeved with an elastic member, the elastic member is configured as an elastic pad 51, and the elastic pad 51 is positioned between the guiding rotation-preventing part 3 and the mounting bearing 43. Like this, in the process that screw rod portion 2 retreats, elastic pad 51 can elastically support and press between direction rotation preventing portion 3 and swivel nut portion 1, and as shown in fig. 2, elastic pad 51 links to each other with support frame 52 through four support columns 53 that run through direction rotation preventing portion 3 to the impact force that makes elastic pad 51 receive can transmit to support frame 52 through four support columns 53, and then transmits to return spring and surrounding casing, in order to play the effect of buffering, thereby avoid appearing the direction rotation preventing portion 3 and screw rod portion 2 and be connected cracked problem.
The utility model also provides a brake booster.
According to the utility model discloses brake booster is provided with the screw drive assembly 100 of any kind of above-mentioned embodiment, prevents to change through setting up the elastic component between portion 3 at swivel nut portion 1 and direction for the elastic component can cushion screw portion 2 effectively and roll back the in-process direction and prevent the impact force between portion 3 and the swivel nut portion 1, and reduce the direction and prevent the moment of inertia of portion 3, prevent that the direction from preventing to change portion 3 and screw portion 2 and be connected cracked problem.
The brake booster can be an electronic brake booster, so that the damage of the fixed parts of the screw rod part 2 and the guide rotation preventing part 3 caused by instantaneous tensile force impact in the brake releasing process of the electronic brake booster can be solved, and the functional failure of the electronic brake booster is avoided; the impact noise of the guide rotation preventing part 3 and the screw sleeve part 1 can be solved, and the NVH performance of the product is improved, so that the market competitiveness of the product is improved.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A screw drive assembly (100), comprising:
a screw housing portion (1);
the screw rod part (2) penetrates through the screw sleeve part (1) and is in threaded fit with the screw sleeve part (1), and one end of the screw rod part (2) is provided with a guide rotation preventing part (3);
the elastic piece is positioned between the screw sleeve part (1) and the guide rotation preventing part (3) and is suitable for being elastically pressed against the screw sleeve part (1).
2. The threaded drive assembly (100) according to claim 1, characterized in that said elastic element is configured as an annular element and is sheathed outside said screw portion (2).
3. The screw drive assembly (100) according to claim 2, wherein the end face of the screw sleeve portion (1) facing the guide rotation prevention portion (3) is provided with a mounting bearing (43); wherein
One end of the elastic piece is suitable for abutting against the guide rotation preventing part (3), and the other end of the elastic piece is suitable for abutting against the mounting bearing (43).
4. The thread drive assembly (100) according to claim 3, wherein an end face of the screw sleeve portion (1) facing the guide rotation prevention portion (3) is provided with a mounting undercut (42), the mounting bearing (43) being configured as a needle bearing; wherein
One axial end of the needle bearing is embedded into the mounting sunken groove (42), and the other axial end of the needle bearing is suitable for abutting against the other end of the elastic piece.
5. The threaded drive assembly (100) according to claim 4, wherein the other axial end of the needle bearing is lower than the end face of the nut portion (1) facing the guide rotation prevention portion (3) in the axial direction of the screw portion (2).
6. The thread drive assembly (100) of claim 2, further comprising: a support frame (52), the support frame (52) is connected with the elastic piece, and the support frame (52) is used for being connected with a mounting structure.
7. The screw drive assembly (100) according to claim 6, wherein the support frame (52) is located on a side of the rotation prevention guide portion (3) facing away from the screw housing portion (1), and the support frame (52) is connected to the elastic member by a support column (53) penetrating the rotation prevention guide portion (3).
8. The threaded drive assembly (100) according to claim 7, wherein said supporting column (53) is plural, and a plurality of said supporting columns (53) are distributed around said screw portion (2).
9. The screw drive assembly (100) according to claim 2, wherein the resilient member is configured as a helical spring (41) or a resilient pad (51).
10. A brake booster, characterized in that a threaded transmission assembly (100) according to any one of claims 1 to 9 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123270500.1U CN216580476U (en) | 2021-12-23 | 2021-12-23 | Threaded transmission assembly and brake booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123270500.1U CN216580476U (en) | 2021-12-23 | 2021-12-23 | Threaded transmission assembly and brake booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216580476U true CN216580476U (en) | 2022-05-24 |
Family
ID=81617214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123270500.1U Active CN216580476U (en) | 2021-12-23 | 2021-12-23 | Threaded transmission assembly and brake booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216580476U (en) |
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2021
- 2021-12-23 CN CN202123270500.1U patent/CN216580476U/en active Active
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