CN109914956A - A kind of limit shaft and preparation method thereof on floor spring - Google Patents
A kind of limit shaft and preparation method thereof on floor spring Download PDFInfo
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- CN109914956A CN109914956A CN201910277761.4A CN201910277761A CN109914956A CN 109914956 A CN109914956 A CN 109914956A CN 201910277761 A CN201910277761 A CN 201910277761A CN 109914956 A CN109914956 A CN 109914956A
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Abstract
The present invention provides the limit shafts and preparation method thereof on a kind of floor spring, belong to the accessory technical field of floor spring.It solves the problems, such as that existing limit shaft processing difficulties, qualification rate are not high.Limit shaft on this floor spring includes axis body, cam one and cam two, axis body one end has Connecting jont, the axis body other end has positioning head, positioning head has bulge loop one and bulge loop two axially outside, one outer peripheral surface of bulge loop includes arc surface one and is connected between one both ends of arc surface and faces one directly, cam one is equipped with matching hole one identical with one shape of bulge loop, cam one is fixed on bulge loop one by matching hole one, two outer peripheral surface of bulge loop includes arc surface two and is connected between two both ends of arc surface and faces two directly, cam two is equipped with matching hole two identical with two shape of bulge loop, cam two is fixed on bulge loop two by matching hole two, face directly one with to face two directly in the same plane.It has many advantages, such as that qualification rate is high, easy to process, positioning accuracy is high.
Description
Technical field
The invention belongs to the accessory technical field of floor spring, a kind of be related on floor spring limit shaft and preparation method thereof.
Background technique
Floor spring is a kind of hydraulic door closer, and for example application No. is one kind disclosed in 201410660425.5 for structure
The adjustable multistage of switch gate power positions floor spring, including valve body and central axis, is equipped with the valve body cavity and movable chamber communicated in valve body,
The both ends of valve body cavity are respectively equipped with piston and rear cover, are connected with spring between piston and rear cover, in movable chamber from up to down successively
Equipped with upper drawing piece, main cam, auxiliary cam and lower drawing piece, guide groove is equipped on upper drawing piece and lower drawing piece, central axis passes through upper drawing piece
With the guide groove of lower drawing piece and be connected in movable chamber vertically, main cam and auxiliary cam are fixedly connected with central axis, upper drawing piece with
Lower drawing piece passes through big roller axis connection, and the live roller abutted with main cam is connected on big roller axis, and main cam has continuous
Arc-shaped curved surface outer profile, main cam is equipped with the notch that can be used cooperatively with live roller, and auxiliary cam has arc
Outer profile is connected with trundle axis on lower drawing piece, the cushion idler that can be abutted with auxiliary cam, piston is connected on trundle axis
Head be equipped with the oil leak hole of connection valve body cavity and movable chamber, check valve is equipped in oil leak hole, the head of piston is fixed on pull-up
Between piece and lower drawing piece, the top of movable chamber is equipped with upper cover, is equipped with aperture on upper drawing piece and lower drawing piece, drawing is connected in aperture
Piece screw, the head of piston are equipped with the via hole being aligned with aperture, and upper drawing piece and lower drawing piece are fixed by pulling-on piece screw with piston.It
Using double-cam structure, 90 degree of positioning not only may be implemented, and any point location of 90~180 degree may be implemented.
Since main cam and auxiliary cam decide the locating effect of door, in general, central axis, main cam and auxiliary cam are all
Integral structure can be made, that is, blank is processed in the way of solid forging by machining center, can guarantee in this way
Fit angle between main cam and auxiliary cam and central axis, so that central axis be enable to have good service performance.However,
Requirement of this solid forging mode for processing quality is very high, and process it is also difficult in the extreme, it is especially main
Between cam and auxiliary cam require have suitable spacing and the spacing be again smaller and central axis both ends shapes and
The shape of main cam and auxiliary cam is all more special, and the selection and use for process tool are even more to have very high requirement,
Once deviation, which occurs, in the processing of some position will lead to entire scrap of the product, therefore the problem not high there is also qualification rate.
Summary of the invention
The purpose of the present invention is in view of the above-mentioned problems existing in the prior art, propose a kind of limit shaft on floor spring and
Its production method, the technical problem to be solved is that reduce processing request while guaranteeing good service performance, improve product
Qualification rate.
Object of the invention can be realized by the following technical scheme:
A kind of limit shaft on floor spring is set to including axis body and along axial on axis body and for realizing door positioning
Cam one and cam two, described axis body one end have the Connecting jont for being connected with door, and the axis body other end has positioning head,
It is characterized in that, the positioning head has bulge loop one and bulge loop two axially outside, and bulge loop one is close to Connecting jont, one outer peripheral surface of bulge loop
It including arc surface one and is connected between one both ends of arc surface and faces one directly, cam one is equipped with identical with one shape of bulge loop
Matching hole one, cam one are fixed on bulge loop one by matching hole one, and two outer peripheral surface of bulge loop includes arc surface two and is connected to
Two are faced directly between two both ends of arc surface, and cam two is equipped with matching hole two identical with two shape of bulge loop, and cam two is by matching
Hole two is closed to be fixed on bulge loop two, face directly one with to face two directly in the same plane.
By limit shaft be designed as include axis body and for realizing door positioning cam one with it is split type as cam two
Structure is individually produced and is processed to each component, is then carried out group again and is filled with to form complete limit shaft.Compared to existing skill
Limit shaft is more easier to control, to make this limit when each component individually produces using for solid forging for details in art
Axis reduces processing request well, and the size of each component is more easier to control, and improves the qualification rate of product；Meanwhile
In the art, cam one and cam two are standard size, and there will be institute's differences for the size of axis body part, therefore limit shaft is torn open
It is extra including mass-produce enterprise can in advance to be divided into
Cam one is stored with cam two, need to only produce corresponding axis body when needing to produce the limit shaft of different size next time,
Then directly the cam one produced in advance, cam two are mutually spliced with axis body, improve the production efficiency of enterprise well,
Realize batch production.
Since the angle of cam one and cam two decides the positioning performance of door, although Integral forge type limit shaft is for adding
Work has relatively high requirement, but the cam one after machine-shaping and two angle changing rate of cam are accurate.For this purpose, this limit shaft is fixed
Bulge loop one and bulge loop two are set on potential head, and one outer peripheral surface of bulge loop includes arc surface one and is connected between one both ends of arc surface
Face one directly, two outer peripheral surface of bulge loop includes arc surface two and is connected between two both ends of arc surface and faces two directly, in production axis body
When will directly face Connecting jont opening relationships together directly, then identical with one shape of bulge loop matching hole one is set on cam one,
Matching hole two identical with two shape of bulge loop is set on cam two, matching hole one and bulge loop one can be passed through in assembling in this way
Cooperation and the cooperation of matching hole two and bulge loop two ensure cam one and setting angle of the cam two on axis body, thus dropping
Low difficulty of processing ensure that the normal use performance of limit shaft while improve production efficiency, will especially face directly one with face directly
Two are set as in the same plane, can even more control the relative angle between cam one and cam two, to make
It obtains cam one and the installation accuracy of cam two is higher, it is ensured that positioning accuracy when use on the door.In addition, facing one directly and facing two directly
Setting may also be ensured that between cam one and bulge loop one and cam two and bulge loop two and be not all disc and contact, can play
The effect for increasing torque when the effect and use relative to axis body beat of cam one and cam two is prevented when use.
In the limit shaft on above-mentioned floor spring, there is annular stop face, cam at bulge loop one on the axis body
One is resisted against on annular stop face close to an end face of Connecting jont.
When assembly, cam one is fixed on bulge loop one with interference fit type, while cam one is close to the one of Connecting jont
End face can be resisted against on the annular stop face of axis body, can guarantee that cam one is accurately installed in place in this way, to add improving
Ensure that limit shaft has good service performance while work convenience.
In the limit shaft on above-mentioned floor spring, the bulge loop two is equipped with annular limit close to one end outer peripheral surface of bulge loop one
One end face in position portion, cam two is equipped with limit chamber, and limit chamber is connected with one end of matching hole two, the insertion limit of annular stop portion
It is intracavitary.
In limit shaft professional standard, the gap size between cam one and cam two is required, gap mistake
The big or too small locating effect that can all influence door, this is also to determine that existing limit shaft uses the major reason of solid forging mode
One of, because solid forging mode may insure that the gap between cam one and cam two can control in the reasonable scope.
And in the application, in addition to adopt a split structure improve processing convenience other than, also in bulge loop two close to bulge loop one
One end outer peripheral surface on setting (setting in annular stop portion is also by numerically-controlled machine tool completion when producing axis body in annular stop portion
, and it is very simple to process annular stop portion, therefore does not reduce processing convenience), and be arranged in an end face of cam two
Cam two is fixed on bulge loop two in assembling in the mode opposite with cam one of the end face where limit chamber, so by limit chamber
It is embedded into limit chamber by annular stop portion afterwards to be defined to the position of cam two, is guaranteed in conjunction with upper annular stop face convex
The accurate installation of wheel one, so that it is guaranteed that the gap between cam one and cam two can control in the reasonable scope.
In the limit shaft on above-mentioned floor spring, the outer peripheral surface in the annular stop portion includes arc surface three and connection
Three are faced directly between three both ends of arc surface, three is faced directly and is connected with facing two directly, and are faced three directly and be generally aligned in the same plane with facing two directly
On, the limit chamber shape is identical as annular stop portion.
Three are faced directly by being arranged in annular stop portion, are faced three directly and are located at facing two directly with facing two directly and be connected and face three directly
On same plane, while limit chamber being shaped to identical as annular stop portion, cam two and bulge loop can be increased in this way
The contact area at non-circular place between two, the setting angle that can be further ensured that between cam two and axis body, while can also mention
The effect that height prevents cam two from rotating relative to axis body.
In the limit shaft on above-mentioned floor spring, the size of the matching hole one is slightly larger than the size in annular stop portion.
The size design of matching hole one is slightly over the size in annular stop portion, and such cam one can not be by annular stop
The influence in portion and smoothly be fixed to bulge loop one on, ensure that convenience when assembled.
In the limit shaft on above-mentioned floor spring, the cam one is all made of powder metallurgy mode with cam two and forms.
Using powder metallurgy mode shaping cam one and cam two, the convenience of processing can be further improved, especially
For needing to be arranged the cam one of matching hole one and needing to be arranged the cam two of matching hole two and limit chamber, only need prior
The mold with respective shapes is made, without still further processing after die sinking.
The production method of limit shaft on a kind of floor spring, which is characterized in that the production method includes the following steps:
A, next section of bar blank blanking: is cut on metal bar material；
B, axis body forms: the bar blank in step a being placed on numerically-controlled machine tool and is machined out, obtains one end as connection
Tieing, the axis body that the other end is positioning head, positioning head have bulge loop one and bulge loop two, the outer peripheral surface of bulge loop one axially outside
Including arc surface one and be connected to one both ends of arc surface face one directly, and the outer peripheral surface of bulge loop two includes arc surface two and connection
Two are faced directly in two both ends of arc surface；
C, cam forms: cam one and cam two are respectively obtained in the way of powder metallurgy by metal powder, it is after molding
There is matching hole one identical with one shape of bulge loop on cam one, have on cam two after molding identical with two shape of bulge loop
Matching hole two；
D, it assembles: being successively fixed to cam one and cam two in an interference fit in the way of manually or mechanically hand
On the positioning head of axis body, complete limit shaft is obtained, wherein cam one is fixed on bulge loop one by matching hole one, cam two-way
Matching hole two is crossed to be fixed on bulge loop two；
E, it welds: being welded using brazing mode between cam two and axis body and between cam one and axis body.
When making limit shaft using this production method, next section of bar hair is cut from metal bar material according to design size
Bar blank is placed on numerically-controlled machine tool and is machined out by base, and bar blank is made to be capable of forming one end for connecting with door
Connecting jont, the other end be positioning head axis body, and should during to be processed on the positioning head of axis body bulge loop one with it is convex
Ring two.Then fetching metal powder cooperates corresponding punching block to be separately formed out cam one and cam two in a manner of powder metallurgy, forms
There is matching hole one identical with one shape of bulge loop on cam one afterwards, have and two shape phase of bulge loop on cam two after molding
Same matching hole two.Then, cam one after molding is fixed in an interference fit in the way of manually or mechanically hand
On the bulge loop one of positioning head, and similarly again in a manner of manually or mechanically hand by cam two after molding in an interference fit
On bulge loop two fixed to positioning head, such axis body, cam are connected into once with cam two for complete limit shaft.Most
Afterwards, brazing mode is recycled to weld between cam two and axis body and between cam one and axis body, so that cam one, convex
Wheel two and axis body are firmly attached as an entirety.
The production method of this limit shaft by will be assembled again after axis body, cam one and the independent machine-shaping of cam two,
The processing method of solid forging is needed instead of existing limit shaft, the production method of this limit shaft reduces processing well and wants
It asks, and the size of each component is more easier to control, improves the qualification rate of product；Meanwhile in the art, cam one with it is convex
Wheel two is standard size, and that there will be institutes is different for the size of axis body part, thus by limit shaft be split as include axis body, cam one with
And makes enterprise that can mass-produce extra cam one in advance after split type structure as cam two and store with cam two
It deposits, need to only produce corresponding axis body when needing to produce the limit shaft of different size next time, then will directly produce in advance
Cam one, cam two mutually splice with axis body, improve the production efficiency of enterprise well, realize batch production.
Compared with prior art, the limit shaft and preparation method thereof on this floor spring has the advantage that
1, it will be assembled again after axis body, cam one and the independent machine-shaping of cam two, reduce processing request well,
And the size of each component is more easier to control, and improves the qualification rate of product；
2, limit shaft is split as to include making enterprise can after axis body, split type structure as cam one and cam two
It mass-produces extra cam one in advance to be stored with cam two, when needing to produce the limit shaft of different size next time only
Corresponding axis body need to be produced, directly the cam one produced in advance, cam two are mutually spliced with axis body then, mentioned well
The production efficiency of Gao Liao enterprise realizes batch production；
3, one is faced directly with the setting of facing two directly so that cam one and cam two, when assembling may insure cam one and cam two
Setting angle on axis body, to ensure that normally making for limit shaft while reducing difficulty of processing, improving production efficiency
Use performance；
4, the setting of annular stop face, annular stop portion and limit chamber guarantees that the spacing between cam one and cam two can
Control in the reasonable scope, further ensures the normal use performance of limit shaft.
Detailed description of the invention
Fig. 1 is the schematic diagram of the limit shaft on this floor spring.
Fig. 2 is the explosive view of the limit shaft on this floor spring.
Fig. 3 is the schematic diagram of cam one in limit shaft on this floor spring.
Fig. 4 A is the schematic diagram of cam two in limit shaft on this floor spring.
Fig. 4 B is another angle schematic diagram of cam two in limit shaft on this floor spring.
Fig. 5 is the cross-sectional view of the limit shaft on this floor spring.
In figure, 1, axis body；1a, Connecting jont；1b, positioning head；1b1, bulge loop one；1b11, arc surface one；1b12, one is faced directly；
1b2, bulge loop two；1b21, arc surface two；1b22, two are faced directly；1b3, annular stop portion；1b31, arc surface three；1b32, it faces directly
Three；1c, annular stop face；2, cam one；2a, matching hole one；3, cam two；3a, matching hole two；3b, limit chamber.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
A kind of production method of limit shaft on floor spring, the production method include the following steps:
A, blanking: next section of bar blank is cut on a metal bar material, the length of bar blank is according to limit shaft
Design length is cut；
B, axis body 1 forms: bar blank obtained in step a being placed on numerically-controlled machine tool and is machined out, so that stick
Material blank forms the axis body 1 that one end is Connecting jont 1a, the other end is positioning head 1b, the shape of Connecting jont 1a and the shape of door base apertures
Shape is identical, while processing two 1b2 of one 1b1 of bulge loop and bulge loop along axial direction on positioning head 1b；
The outer peripheral surface to one 1b1 of bulge loop is also needed to cut during processing one 1b1 of bulge loop, so that bulge loop one
The outer peripheral surface of 1b1 includes one 1b11 of arc surface and is connected between one both ends 1b11 of arc surface and faces a 1b12 directly；And
The outer peripheral surface to two 1b2 of bulge loop is also needed to cut during processing two 1b2 of bulge loop, so that the outer peripheral surface of two 1b2 of bulge loop
It including two 1b21 of arc surface and is connected between two both ends 1b21 of arc surface and faces two 1b22 directly, and to guarantee bulge loop two simultaneously
1b2 has annular stop portion 1b3 on the outside of one end of one 1b1 of bulge loop, and the outer peripheral surface of annular stop portion 1b3 will include circular arc
It three 1b31 of face and is connected between three both ends 1b31 of arc surface and faces three 1b32 directly.
C, cam forms: cooperating corresponding punching block to be separately formed out in the way of powder metallurgy and designed shape by metal powder
The identical cam of shape 1 and cam 23 have matching hole one identical with one 1b1 shape of bulge loop on cam 1 after molding
2a, have on cam 23 after molding two 3a of matching hole identical with two 1b2 shape of bulge loop and with annular stop portion 1b3 shape
The identical limit chamber 3b of shape；
Step c can be to carry out simultaneously before step a, later or with step a, that is to say, that can first produce axis body 1, again
Cam 1 and cam 23 are produced, or first production cam 1 and cam 23, reproduction axis body 1, also or is to produce
Cam 1 and cam 23 are produced while axis body 1.In order to guarantee the normal assembly of cam 1, by the cooperation on cam 1
The internal diameter of one 2a of hole is designed as the outer diameter greater than annular stop portion 1b3.
D, it assembles: axis body 1 obtained in step b is fixed on fixture, it then first will be convex in a manner of manually or mechanically hand
It takes turns 1 to be installed on one 1b1 of bulge loop of positioning head 1b by one 2a of matching hole, so that cam 1 and one 1b1 of bulge loop is matched with interference
Conjunction mode forms fixation, then cam 23 is installed to the convex of positioning head 1b by two 3a of matching hole in a manner of manually or mechanically hand
On two 1b2 of ring, so that cam 23 and two 1b2 of bulge loop form fixation, while the annular on two 1b2 of bulge loop with interference fit type
Limiting section 1b3 is embedded into the limit chamber 3b of cam 23 to control the spacing between cam 1 and cam 23, such axis body 1,
Cam 1 and cam 23 have just been combined into a complete limit shaft；
E, it welds: being welded using brazing mode between cam 23 and axis body 1 and between cam 1 and axis body 1
It is fixed.Specifically during the brazing process, the limit shaft in step d can be placed vertically, solder is then placed on cam 1 and bulge loop
At the abutting of one 1b1, then solder and limit shaft are heated, after solder is heated to a little higher than brazing filler metal fusing point temperature, pricker
Expect to melt and be inhaled by capillarity and full of in the gap between one 1b1 of cam 1 and bulge loop；Then solder is placed
At the abutting of cam 23 and two 1b2 of bulge loop, solder and limit shaft are heated, brazing filler metal melts and by capillarity quilt
It sucks and full of in the gap between two 1b2 of cam 23 and bulge loop.
As shown in Figure 1, the limit shaft on a kind of floor spring, including axis body 1 and it is set on axis body 1 and is used for along axial
Realize the cam 1 and cam 23 of door positioning, one end of axis body 1 has the Connecting jont 1a for being connected with door, axis body 1
The other end has positioning head 1b, and cam 1 and cam 23 are respectively positioned on positioning head 1b.For real on cam 1 and cam 23
The structure of existing door positioning and the specific structure of Connecting jont 1a can refer to that application No. is one kind disclosed in 201410660425.5
The adjustable multistage of switch gate power positions floor spring.
As depicted in figs. 1 and 2, positioning head 1b has one 1b1 of bulge loop and two 1b2 of bulge loop axially outside, wherein bulge loop one
1b1 is all made of powder metallurgy mode with cam 23 and forms close to Connecting jont 1a, two 1b2 of bulge loop far from Connecting jont 1a, cam 1,
There is one 2a of matching hole on cam 1, there is two 3a of matching hole on cam 23, cam 1 is fixed on convex by one 2a of matching hole
On one 1b1 of ring, cam 23 is fixed on two 1b2 of bulge loop by two 3a of matching hole.
As shown in Fig. 2, Fig. 3 and Fig. 4 A, the outer peripheral surface of one 1b1 of bulge loop includes one 1b11 of arc surface and is connected to arc surface
A 1b12 is faced directly between one both ends 1b11, and the one 2a shape of matching hole on cam 1 is identical as the shape of one 1b1 of bulge loop, convex
1 are taken turns to be welded and fixed with axis body 1 by brazing mode；The outer peripheral surface of two 1b2 of bulge loop includes two 1b21 of arc surface and company
Be connected to two both ends 1b21 of arc surface faces two 1b22 directly, the shape phase of matching hole two 3a shapes and two 1b2 of bulge loop on cam 23
Together, it faces a 1b12 directly and to face two 1b22 directly in the same plane, cam 23 and axis body 1 weld by brazing mode and consolidate
It is fixed.
As shown in Fig. 2, Fig. 4 B and Fig. 5, there is annular stop face 1c at one 1b1 of bulge loop on axis body 1, cam 1 leans on
An end face of nearly Connecting jont 1a is resisted against on the 1c of annular stop face.Two 1b2 of bulge loop is equipped with close to one end outer peripheral surface of one 1b1 of bulge loop
Annular stop portion 1b3, annular stop portion 1b3 are close to the end face of one 1b1 of bulge loop and two 1b2 of bulge loop close to the end face of one 1b1 of bulge loop
It is flush, an end face of cam 23 is equipped with limit chamber 3b, and limit chamber 3b is connected with one end of two 3a of matching hole, annular stop
Portion 1b3 is embedded into limit chamber 3b.
As shown in Figure 2 and Figure 5, specifically, the outer peripheral surface of annular stop portion 1b3 includes three 1b31 of arc surface and connection
Three 1b32 are faced directly between three both ends 1b31 of arc surface, are faced three 1b32 directly and are connected with two 1b22 are faced directly, and face three 1b32 directly
Two 1b22 are in the same plane with facing directly, and the shape of limit chamber 3b is identical as the shape of annular stop portion 1b3.Since annular limits
The setting of position portion 1b3 is smoothly fixed to one 1b1 of bulge loop to enable cam 1 not influenced by annular stop portion 1b3
On, need the internal diameter by one 2a of matching hole to be designed as the outer diameter slightly larger than annular stop portion 1b3.
When making limit shaft, next section of bar blank is cut from metal bar material according to design size, bar blank is put
It sets and is machined out on numerically-controlled machine tool, bar blank is made to be capable of forming Connecting jont 1a of the one end for connecting with door, another
End is the axis body 1 of positioning head 1b, and to process one 1b1 of bulge loop and bulge loop two on the positioning head 1b of axis body 1 during being somebody's turn to do
1b2.Then fetching metal powder cooperates corresponding punching block to be separately formed out cam 1 and cam 23 in a manner of powder metallurgy, forms
There is one 2a of matching hole identical with one 1b1 shape of bulge loop on cam 1 afterwards, have on cam 23 after molding and bulge loop
Identical two 3a of matching hole of two 1b2 shapes.Then, cam 1 after molding is matched with interference in the way of manually or mechanically hand
The mode of conjunction is fixed on one 1b1 of bulge loop of positioning head 1b, and similarly again will be after molding convex in a manner of manually or mechanically hand
It takes turns 23 to be fixed in an interference fit on two 1b2 of bulge loop of positioning head 1b, such axis body 1, cam 1 and cam 23 are just
It is connected into for complete limit shaft.Finally, recycling brazing mode between cam 23 and axis body 1 and cam 1
It is welded between axis body 1, so that cam 1, cam 23 and axis body 1 are firmly attached as an entirety.
The production method of this limit shaft is by will carry out again group after axis body 1, cam 1 and the independent machine-shaping of cam 23
Dress, the processing method of solid forging is needed instead of existing limit shaft, the production method of this limit shaft reduces processing well
It is required that and the size of each component be more easier to control, improve the qualification rate of product；Meanwhile in the art, cam 1
Be standard size with cam 23, that there will be institutes is different for the size of 1 part of axis body, therefore by limit shaft be split as include axis body 1,
Make after split type structure as cam 1 and cam 23 enterprise can mass-produce in advance extra cam 1 with it is convex
It takes turns 23 to be stored, need to only produce corresponding axis body 1 when needing to produce the limit shaft of different size next time, then directly
The cam 1 produced in advance, cam 23 and 1 phase of axis body are assembled, improve the production efficiency of enterprise well, is realized
Batch production.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (7)
1. the limit shaft on a kind of floor spring, including axis body (1) and along it is axial be set on axis body (1) and for realizing door it is fixed
The cam one (2) and cam two (3) of position, described axis body (1) one end have the Connecting jont (1a) for being connected with door, axis body
(1) other end have positioning head (1b), which is characterized in that the positioning head (1b) axially outside have bulge loop one (1b1) with
Bulge loop two (1b2), bulge loop one (1b1) close to Connecting jont (1a), bulge loop one (1b1) outer peripheral surface include arc surface one (1b11) and
One (1b12) that face directly being connected between the both ends arc surface one (1b11), cam one (2) are equipped with and bulge loop one (1b1) shape phase
Same matching hole one (2a), cam one (2) are fixed on bulge loop one (1b1) by matching hole one (2a), the periphery bulge loop two (1b2)
Face includes arc surface two (1b21) and is connected between the both ends arc surface two (1b21) and faces two (1b22), cam two (3) directly
It is equipped with matching hole two (3a) identical with (1b2) shape of bulge loop two, cam two (3) is fixed on bulge loop by matching hole two (3a)
On two (1b2), faces one (1b12) directly and to face two (1b22) directly in the same plane.
2. the limit shaft on floor spring according to claim 1, which is characterized in that close to bulge loop one on the axis body (1)
There is annular stop face (1c) at (1b1), cam one (2) is resisted against annular stop face (1c) close to an end face of Connecting jont (1a)
On.
3. the limit shaft on floor spring according to claim 2, which is characterized in that the bulge loop two (1b2) is close to bulge loop
One end outer peripheral surface of one (1b1) is equipped with annular stop portion (1b3), and an end face of cam two (3) is equipped with limit chamber (3b), limit chamber
(3b) is connected with the one end of matching hole two (3a), and annular stop portion (1b3) is embedded in limit chamber (3b).
4. the limit shaft on floor spring according to claim 3, which is characterized in that outside the annular stop portion (1b3)
Circumferential surface includes arc surface three (1b31) and is connected between the both ends arc surface three (1b31) and faces three (1b32) directly, faces three directly
(1b32) is connected with two (1b22) are faced directly, and faces three (1b32) and in the same plane, the limit of facing two (1b22) directly directly
Position chamber (3b) shape is identical as annular stop portion (1b3).
5. the limit shaft on floor spring according to claim 4, which is characterized in that the size of the matching hole one (2a) is omited
Greater than the size of annular stop portion (1b3).
6. the limit shaft on floor spring described according to claim 1 or 2 or 3 or 4 or 5, which is characterized in that the cam one
(2) powder metallurgy mode is all made of with cam two (3) to form.
7. a kind of production method of the limit shaft on floor spring, which is characterized in that the production method includes the following steps:
A, next section of bar blank blanking: is cut on metal bar material；
B, axis body forms: the bar blank in step a being placed on numerically-controlled machine tool and is machined out, obtaining one end is Connecting jont
(1a), the other end are the axis body (1) of positioning head (1b), and positioning head (1b) has bulge loop one (1b1) and bulge loop axially outside
Two (1b2), the outer peripheral surface of bulge loop one (1b1) include arc surface one (1b11) and are connected to the straight of the both ends arc surface one (1b11)
Face one (1b12), the outer peripheral surface of bulge loop two (1b2) include arc surface two (1b21) and are connected to the both ends arc surface two (1b21)
Face two (1b22) directly；
C, cam forms: cam one (2) and cam two (3) is respectively obtained in the way of powder metallurgy by metal powder, after molding
Cam one (2) on there is matching hole one (2a) identical with (1b1) shape of bulge loop one, have on cam two (3) after molding
Matching hole two (3a) identical with (1b2) shape of bulge loop two；
D, it assembles: successively being fixed cam one (2) and cam two (3) in an interference fit in the way of manually or mechanically hand
Onto the positioning head (1b) of axis body (1), complete limit shaft is obtained, wherein cam one (2) is fixed on by matching hole one (2a)
On bulge loop one (1b1), cam two (3) is fixed on bulge loop two (1b2) by matching hole two (3a)；
E, it welds: being carried out using brazing mode between cam two (3) and axis body (1) and between cam one (2) and axis body (1)
Welding.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127727A (en) * | 2019-06-25 | 2020-12-25 | 盖慈有限公司 | Drive device for a leaf of a door or window and method for producing such a drive device |
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| CN112127727A (en) * | 2019-06-25 | 2020-12-25 | 盖慈有限公司 | Drive device for a leaf of a door or window and method for producing such a drive device |
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