Force limiting type mandrel and retractor
阅读说明:本技术 一种限力式芯轴和卷收器 (Force limiting type mandrel and retractor ) 是由 赵轰 谢杰 孙波 于 2020-06-23 设计创作,主要内容包括:本申请公开一种限力式芯轴和卷收器中,其中,限力式芯轴包括:芯轴本体和限力杆;限力杆的两端设置有连接结构;芯轴本体的内部设有容置空间,且在芯轴本体两端的轴头上设置有与连接结构匹配的限定结构;限定结构以可拆卸方式设置在芯轴本体两端的轴头上;连接结构与限定结构连接,限力杆同轴向设置芯轴本体的容置空间中。本申请实施例将限定结构设置为可拆卸式的结构,且每个限定结构可设置为对应于连接结构的不同的样式,从而通过拆换不同的限定结构,即可实现不同的限定结构与不同的限力杆上的连接结构的连接。即在不更换限力式芯轴的其它部件的前提下,改善了限力杆和芯轴轴头配合的方式较为单一的缺陷。(The application discloses in limit force formula dabber and coiler, wherein, limit force formula dabber includes: the mandrel comprises a mandrel body and a force limiting rod; two ends of the force limiting rod are provided with connecting structures; the mandrel comprises a mandrel body and is characterized in that an accommodating space is arranged inside the mandrel body, and limiting structures matched with the connecting structures are arranged on the mandrel heads at two ends of the mandrel body; the limiting structures are detachably arranged on the shaft heads at two ends of the mandrel body; the connecting structure is connected with the limiting structure, and the force limiting rod is arranged in the accommodating space of the mandrel body in the same axial direction. The limiting structures are arranged to be detachable structures, and each limiting structure can be arranged to be different types corresponding to the connecting structures, so that the different limiting structures can be connected with the connecting structures on different force limiting rods by detaching and replacing the different limiting structures. Namely, the defect that the matching mode of the force limiting rod and the spindle head of the spindle is single is overcome on the premise of not replacing other parts of the force limiting spindle.)
1. The utility model provides a power-limiting formula dabber installs in the coiler which characterized in that includes: the mandrel comprises a mandrel body and a force limiting rod;
two ends of the force limiting rod are provided with connecting structures;
the mandrel comprises a mandrel body and is characterized in that an accommodating space is formed inside the mandrel body, and limiting structures matched with the connecting structures are arranged on the shaft heads at two ends of the mandrel body; the limiting structures are detachably arranged on the spindle heads at two ends of the spindle body;
the connecting structure is connected with the limiting structure, and the force limiting rod is coaxially arranged in the accommodating space of the mandrel body.
2. The force-limiting mandrel of claim 1 wherein said limiting structure comprises a limiting rim and a limiting groove;
the limiting wheel ring is arranged on the inner surface of the mandrel body;
the limiting groove is positioned in the limiting rim and is arranged into a groove shape which can be matched with the connecting structure.
3. The force-limiting mandrel of claim 2 wherein the limiting rim is fixedly disposed on the inner surface of the mandrel body by a locating structure; or
The limiting rim is fixedly arranged on the inner surface of the mandrel body through a threaded structure.
4. The force-limiting mandrel of claim 3 wherein said locating structure comprises a locating groove and a locating block that mate with each other;
the positioning grooves are arranged on the peripheral wall of the limiting rim at intervals along the peripheral direction of the limiting rim; the notch direction of the positioning groove faces to the inner surface of the mandrel body;
the positioning blocks are distributed on the inner surface of the mandrel body at intervals corresponding to the positioning grooves; the positioning block and the positioning groove are fixedly positioned so as to fixedly arrange the limiting rim on the inner surface of the mandrel body;
alternatively, the positioning grooves and the positioning blocks can be arranged oppositely.
5. The force-limiting mandrel of claim 3 wherein the wall of the spacing rim has an assembly gap along the circumferential direction; the thread structure comprises internal threads arranged on the side wall of the limiting rim forming the assembling gap and an annular convex body with external threads;
the annular convex body is arranged by protruding the inner surface of the mandrel body and can be sleeved between the assembly gaps of the limiting wheel rims, and the external threads of the annular convex body are in threaded connection with the internal threads on the side walls of the limiting wheel rims so as to fix the limiting wheel rims on the inner surface of the mandrel body.
6. The force-limiting mandrel of claim 1 wherein the limiting structures provided on the mandrel heads at both ends of the mandrel body are referred to as a first limiting structure and a second limiting structure, respectively;
the first limiting structure is arranged on a first shaft head, wherein a collision sensor is arranged on the outer side of the shaft head;
the second limiting structure is arranged on a second shaft head provided with a coil spring on the outer side of the shaft head.
7. The force-limiting mandrel of claim 6 wherein the first limiting structure comprises a first limiting rim and a first limiting groove;
the first limiting rim is arranged on the inner surface of the first spindle head;
the first limiting groove is positioned in the first limiting rim, and the first limiting groove is arranged to be a groove shape which can be matched with the connecting structure.
8. The force-limiting mandrel of claim 7 wherein said first limiting rim is fixedly disposed on an inner surface of said first mandrel head by a locating structure; or
The first limiting rim is fixedly arranged on the inner surface of the first shaft head through a threaded structure.
9. The force-limiting mandrel of claim 8 wherein said locating structure comprises a locating groove and a locating block that mate with each other;
the positioning grooves are arranged on the peripheral wall of the first limiting rim at intervals along the peripheral direction of the first limiting rim; the notch direction of the positioning groove faces to the inner surface of the first shaft head;
the positioning blocks are distributed on the inner surface of the first shaft head at intervals corresponding to the positioning grooves; the positioning block and the positioning groove are fixedly positioned, so that the first limiting rim is fixedly arranged on the inner surface of the first shaft head;
alternatively, the positioning grooves and the positioning blocks can be arranged oppositely.
10. The force-limiting mandrel of claim 6 wherein said second limiting structure is configured as a second limiting groove recessed in an inner surface of said second mandrel, and said second limiting groove is configured as a groove-type mateable with said connecting structure.
11. The force-limiting mandrel of any one of claims 1-10 wherein the shape of the connecting structure comprises at least one of the following shapes: spline, quadrilateral, and triangular.
12. A retractor, comprising: coiler body and setting are in limit for the formula dabber on the coiler body, limit for the formula dabber includes: the mandrel comprises a mandrel body and a force limiting rod;
two ends of the force limiting rod are provided with connecting structures;
the mandrel comprises a mandrel body and is characterized in that an accommodating space is formed inside the mandrel body, and limiting structures matched with the connecting structures are arranged on the shaft heads at two ends of the mandrel body;
the connecting structure is connected with the limiting structure, so that the force limiting rod and the mandrel body are coaxially arranged in the accommodating space.
Technical Field
The application relates to the technical field of automobile equipment, in particular to a force limiting type mandrel and a retractor.
Background
The safety belt retractor is a safety belt retractor with an emergency locking function, is a core component of an automobile safety belt, and the retractor is the core component of the automobile safety belt. The pre-tightening device detonates the gas generator within a few milliseconds by colliding the sensor and pushes the pull-back device to pull back the braid, so that people are bound on the seat.
The existing force limiting device generally realizes the force limiting function of rotation failure in a mode of matching a force limiting rod with a spindle head of a spindle. However, the structure that can be connected with the force-limiting rod that sets up on current dabber spindle nose is fixed to make a force-limiting device can only install the force-limiting rod that matches each other and the structure of injecing that corresponds, also make force-limiting rod and dabber spindle nose complex mode comparatively single. When the force limiting device needs to meet different force limiting requirements, the force limiting device can be realized only by replacing the whole force limiting device, so that the force limiting devices with different structures need to be manufactured, the manufacturing cost is increased, and the mass production of the force limiting device is not facilitated.
Therefore, how to improve the matching mode of the force limiting rod and the spindle head of the spindle is single, and the cost for manufacturing the force limiting device is reduced, which becomes a problem to be solved by the technical personnel in the field.
Disclosure of Invention
The embodiment of the application provides a force-limiting type mandrel to solve the problems that a mode that a force limiting rod is matched with a mandrel head of the mandrel is single, and the cost for manufacturing a force limiting device is high. The embodiment of the application further provides a retractor.
The embodiment of the application provides a limit force formula dabber installs in the coiler, includes: the mandrel comprises a mandrel body and a force limiting rod;
two ends of the force limiting rod are provided with connecting structures;
the mandrel comprises a mandrel body and is characterized in that an accommodating space is formed inside the mandrel body, and limiting structures matched with the connecting structures are arranged on the shaft heads at two ends of the mandrel body; the limiting structures are detachably arranged on the spindle heads at two ends of the spindle body;
the connecting structure is connected with the limiting structure, and the force limiting rod is coaxially arranged in the accommodating space of the mandrel body.
Optionally, the limiting structure comprises a limiting rim and a limiting groove;
the limiting wheel ring is arranged on the inner surface of the mandrel body;
the limiting groove is positioned in the limiting rim and is arranged into a groove shape which can be matched with the connecting structure.
Optionally, the limiting rim is fixedly arranged on the inner surface of the mandrel body through a positioning structure; or
The limiting rim is fixedly arranged on the inner surface of the mandrel body through a threaded structure.
Optionally, the positioning structure comprises a positioning groove and a positioning block which are matched with each other;
the positioning grooves are arranged on the peripheral wall of the limiting rim at intervals along the peripheral direction of the limiting rim; the notch direction of the positioning groove faces to the inner surface of the mandrel body;
the positioning blocks are distributed on the inner surface of the mandrel body at intervals corresponding to the positioning grooves; the positioning block and the positioning groove are fixedly positioned so as to fixedly arrange the limiting rim on the inner surface of the mandrel body;
alternatively, the positioning grooves and the positioning blocks can be arranged oppositely.
Optionally, an assembly gap is formed in the wall body of the limiting rim along the circumferential direction; the thread structure comprises internal threads arranged on the side wall of the limiting rim forming the assembling gap and an annular convex body with external threads;
the annular convex body is arranged by protruding the inner surface of the mandrel body and can be sleeved between the assembly gaps of the limiting wheel rims, and the external threads of the annular convex body are in threaded connection with the internal threads on the side walls of the limiting wheel rims so as to fix the limiting wheel rims on the inner surface of the mandrel body.
Optionally, the limiting structures arranged on the spindle heads at the two ends of the spindle body are respectively called as a first limiting structure and a second limiting structure;
the first limiting structure is arranged on a first shaft head, wherein a collision sensor is arranged on the outer side of the shaft head;
the second limiting structure is arranged on a second shaft head provided with a coil spring on the outer side of the shaft head.
Optionally, the first limiting structure comprises a first limiting rim and a first limiting groove;
the first limiting rim is arranged on the inner surface of the first spindle head;
the first limiting groove is positioned in the first limiting rim, and the first limiting groove is arranged to be a groove shape which can be matched with the connecting structure.
Optionally, the first limiting rim is fixedly arranged on the inner surface of the first spindle head through a positioning structure; or
The first limiting rim is fixedly arranged on the inner surface of the first shaft head through a threaded structure.
Optionally, the positioning structure comprises a positioning groove and a positioning block which are matched with each other;
the positioning grooves are arranged on the peripheral wall of the first limiting rim at intervals along the peripheral direction of the first limiting rim; the notch direction of the positioning groove faces to the inner surface of the first shaft head;
the positioning blocks are distributed on the inner surface of the first shaft head at intervals corresponding to the positioning grooves; the positioning block and the positioning groove are fixedly positioned, so that the first limiting rim is fixedly arranged on the inner surface of the first shaft head;
alternatively, the positioning grooves and the positioning blocks can be arranged oppositely.
Optionally, the second limiting structure is configured as a second limiting groove recessed from the inner surface of the second spindle head, and the second limiting groove is configured as a groove shape that is matable with the connecting structure.
Optionally, the shape of the connecting structure includes at least one of the following shapes: spline, quadrilateral, and triangular.
An embodiment of the present application further provides a retractor, including: coiler body and setting are in limit for the formula dabber on the coiler body, limit for the formula dabber includes: the mandrel comprises a mandrel body and a force limiting rod;
two ends of the force limiting rod are provided with connecting structures;
the mandrel comprises a mandrel body and is characterized in that an accommodating space is formed inside the mandrel body, and limiting structures matched with the connecting structures are arranged on the shaft heads at two ends of the mandrel body;
the connecting structure is connected with the limiting structure, so that the force limiting rod and the mandrel body are coaxially arranged in the accommodating space.
Compared with the prior art, the embodiment of the application has the following advantages:
the embodiment of the application provides a limit force formula dabber installs in the coiler, includes: the mandrel comprises a mandrel body and a force limiting rod; two ends of the force limiting rod are provided with connecting structures; the mandrel comprises a mandrel body and is characterized in that an accommodating space is formed inside the mandrel body, and limiting structures matched with the connecting structures are arranged on the shaft heads at two ends of the mandrel body; the limiting structures are detachably arranged on the spindle heads at two ends of the spindle body; the connecting structure is connected with the limiting structure, and the force limiting rod is coaxially arranged in the accommodating space of the mandrel body. The limiting structures are arranged in a detachable structure in the first embodiment of the application, and each limiting structure can be arranged in a different mode corresponding to the connecting structure, so that the connection between different limiting structures and the connecting structures on different force limiting rods can be realized by replacing different limiting structures. On the premise that other parts of the force limiting type mandrel are not replaced, the defect that the matching mode of the force limiting rod and the mandrel head is single is overcome, different force limiting requirements can be met only by replacing the corresponding limiting structure and the corresponding force limiting rod, and therefore the cost for manufacturing the force limiting device is reduced.
Drawings
Fig. 1 is a schematic structural view of a force-limiting mandrel according to a first embodiment of the present disclosure.
Fig. 2 is a schematic assembly diagram of a force limiting rod and a limiting structure in a force limiting type mandrel provided by a first embodiment of the application.
Fig. 3 is a schematic structural diagram of a first limiting structure in a force-limiting mandrel provided in the first embodiment of the present application.
Fig. 4 is a schematic structural diagram of a second limiting structure in the force-limiting mandrel provided in the first embodiment of the present application.
Fig. 5 is an exploded view of a retractor according to a second embodiment of the present application.
Reference numerals: the force limiting type mandrel comprises a force limiting type mandrel 100, a mandrel body 1, a
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit of this application and is therefore not limited to the specific implementations disclosed below.
The first embodiment of the application provides a force-limiting mandrel, which is arranged on a retractor 200 (shown in fig. 5) and used for realizing locking of an automobile safety belt, wherein the safety belt is continuously pulled out due to inertia of a passenger, the shaft head of the mandrel is locked with a limiting structure on a mounting substrate, and the force-limiting mandrel realizes a rotation failure force-limiting function so as to reduce the problem that the chest of the passenger is greatly pulled by the safety belt. Fig. 1 is a schematic structural view of a force-limiting mandrel according to a first embodiment of the present disclosure. Fig. 2 is a schematic assembly diagram of a force limiting rod and a limiting structure in a force limiting type mandrel provided by a first embodiment of the application. Fig. 3 is a schematic structural diagram of a first limiting structure in a force-limiting mandrel provided in the first embodiment of the present application. Fig. 4 is a schematic structural diagram of a second limiting structure in the force-limiting mandrel provided in the first embodiment of the present application.
With reference to fig. 1 to 4, a force-limiting mandrel 100 provided in a first embodiment of the present application includes a mandrel body 1 and a force-limiting
Specifically, in the first embodiment of the present application, the limiting
In the first embodiment of the present application, in order to achieve that the force-limiting mandrel 100 can satisfy different force-limiting failure functions and reduce the cost of manufacturing the force-limiting mandrel 100, the limiting rim is detachably configured. The spacing groove that sets up on each spacing rim can be different, in order to correspond the
In the first embodiment of the present application, the limiting rim is fixedly disposed on the inner surface of the mandrel body 1 through the positioning structure; alternatively, the spacing rim is fixedly arranged on the inner surface of the mandrel body 1 by a threaded structure (not shown).
Specifically, location structure includes constant head tank and locating piece that matches each other, and the constant head tank sets up on the perisporium of spacing rim along the week of spacing rim along direction interval, and the notch direction of constant head tank towards the internal surface of dabber body 1. The locating piece corresponds the constant head tank interval distribution and sets up at the internal surface of dabber body 1, and the locating piece is fixed with the constant head tank location to the realization sets up the internal surface at dabber body 1 with spacing wheel rim is fixed. In the first embodiment of the present application, the number of the positioning grooves and the number of the positioning blocks are preferably three. The positioning block may be arranged in particular as a vertebral body structure.
Of course, it is understood that the positioning grooves and the positioning blocks may be arranged oppositely, that is, the positioning blocks are arranged on the peripheral wall of the limiting rim at intervals along the circumferential direction of the limiting rim, and the protruding direction of the positioning blocks faces the inner surface of the mandrel body 1. The positioning grooves are distributed on the inner surface of the mandrel body 1 at intervals corresponding to the positioning blocks, and the direction of the groove openings of the positioning grooves faces the peripheral wall of the limiting rim. Of course, the positioning structure may have other configurations, and the first embodiment of the present invention is not particularly limited as long as the positioning structure can fix the position-limiting rim on the inner surface of the mandrel body 1.
In the first embodiment of the present application, the wall body of the spacing rim is provided with an assembly gap (not shown) along the circumferential direction, the assembly gap is located in the wall body of the spacing rim, the opening of the assembly gap faces the inner surface of the mandrel body 1, and the side wall around the assembly gap is the side wall in the wall body of the spacing rim. The screw structure includes an internal thread provided on a side wall of the spacing rim forming the fitting gap, and an annular boss having an external thread. Specifically, the annular convex body is arranged to protrude out of the inner surface of the mandrel body 1 and can be sleeved between the assembly gaps of the limiting rim, and the external threads of the annular convex body are connected with the internal threads on the side wall of the limiting rim in a threaded manner, so that the limiting rim is fixedly arranged on the inner surface of the mandrel body 1. Of course, in the first embodiment of the present application, the internal thread and the external thread may be arranged in a reversed manner, that is, the external thread is arranged on the side wall of the limiting rim, and the internal thread is arranged on the annular convex body.
In the first embodiment of the present application, an internal thread may be directly disposed on the side wall outside the wall body of the limiting rim, a groove that can be matched with the internal surface of the mandrel body 1 is disposed on the inner surface of the mandrel body, a corresponding external thread is disposed on the groove wall of the circumferential edge of the groove, and the internal thread on the side wall outside the wall body of the limiting rim is in threaded connection with the external thread disposed on the groove wall of the groove, so as to fix the limiting rim on the inner surface of the mandrel body 1.
The above two connection manners for realizing that the limiting rim can be detached from the inner surface of the mandrel body 1 are many, and the first embodiment of the present application is intended to cover all the connection manners for realizing that the limiting rim can be detached from the inner surface of the mandrel body 1 as long as the connection manners are the connection manners for realizing that the limiting rim can be detached from the inner surface of the mandrel body 1.
Further, in the first embodiment of the present application, since the two ends of the force-limiting
Particularly, as for the first embodiment of the present application, the outside of the
In the first embodiment of the present application, the first
When the first limiting
In the first embodiment of the present application, in order to achieve that the force-limiting spindle 100 can meet different force-limiting failure functions and reduce the cost of manufacturing the force-limiting spindle 100, the first limiting
In the first embodiment of the present application, the
Specifically, the
Of course, it is understood that the positioning grooves and the positioning blocks 71 may be arranged oppositely, that is, the positioning blocks 71 are arranged on the peripheral wall of the first position-limiting
In the first embodiment of the present application, the wall body of the
In the first embodiment of the present application, an internal thread may be directly disposed on a side wall of the first limiting
The above two connection manners for realizing that the first limiting
In the first embodiment of the present application, corresponding to the above-mentioned first limiting
In the first embodiment of the present application, in order to achieve that the force-limiting spindle 100 can correspondingly satisfy different force-limiting failure functions and reduce the cost for manufacturing the force-limiting spindle 100, the second limiting rim may be detachably configured. The second spacing groove that sets up on each second spacing rim can be different to correspond the
In the first embodiment of the present application, the second spacing rim is fixedly disposed on the inner surface of the
Specifically, the
Of course, it will be understood that the positioning grooves and the positioning blocks 71 may be arranged oppositely, that is, the positioning blocks 71 are arranged on the peripheral wall of the second spacing rim at intervals along the peripheral direction of the second spacing rim, and the protruding direction of the positioning blocks 71 faces the inner surface of the
In the first embodiment of the present application, the wall body of the second spacing rim is provided with an assembly gap (not shown) along the circumferential direction, the assembly gap is located in the wall body of the second spacing rim, the opening of the assembly gap faces the inner surface of the
In the first embodiment of the present application, an internal thread may be directly disposed on the side wall of the outer side of the wall body of the second limiting rim, a groove capable of being matched is disposed on the inner surface of the
In the first embodiment of the present application, corresponding to the above-mentioned first limiting
It will be appreciated that in the first embodiment of the present application, it is also possible to provide the first limiting
In the first embodiment of the present application, the connecting
The first embodiment of the present application provides a force-limiting spindle 100, installed in a retractor 200, including: the mandrel comprises a mandrel body 1 and a
A retractor according to a second embodiment of the present application is provided, and fig. 5 is an exploded view of the retractor according to the second embodiment of the present application. The retractor 200 according to the second embodiment of the present application includes: coiler body and the power-limiting formula dabber 100 of setting on the coiler body, power-limiting formula dabber 100 includes: the mandrel comprises a mandrel body 1 and a
Based on the structure provided by the force-limiting mandrel 100 in the first embodiment, the specific structure can be set as described in the first embodiment, and repeated description is omitted here.
The retractor 200 according to the second embodiment of the present application further includes: the locking
Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present application, therefore, the scope of the present application should be determined by the claims that follow.
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