CN101737442B - Braking device - Google Patents
Braking device Download PDFInfo
- Publication number
- CN101737442B CN101737442B CN 200810217658 CN200810217658A CN101737442B CN 101737442 B CN101737442 B CN 101737442B CN 200810217658 CN200810217658 CN 200810217658 CN 200810217658 A CN200810217658 A CN 200810217658A CN 101737442 B CN101737442 B CN 101737442B
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- China
- Prior art keywords
- fixed
- armature
- base
- permanent
- braking device
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Abstract
The invention discloses a braking device, which comprises a fixed seat, a movable seat, an electromagnet, an armature and a resetting piece capable of resetting the movable seat, wherein the movable seat and the fixed seat form a moving pair capable of doing linear reciprocating motion; one of the electromagnet and the armature is fixed on the fixed seat, and the other one of the electromagnet and the armature is fixed on the movable seat; a friction block having a friction surface is fixed on the movable seat; the friction block moves between a first position and a second position; in the first position, the electromagnet and the armature break away; and in the second position, the electromagnet attracts the armature. The movable seat and the friction block are driven to move through the acting force of the resetting piece and the resultant force between the electromagnet and the armature, so that the friction block in the first position or the second position can compress a braking surface, and a carrier can be braked in a needed position in time. When the carrier needs to be released, the on/off power state of the electromagnet is switched, and the resultant force allows the friction block to move to the other position in order to separate the friction block from the braking surface, thus the carrier can run freely.
Description
Technical field
The invention relates to a kind of braking device, especially about a kind of braking device of the X-ray tube carrier being braked for X-ray shooting system.
Background technique
In the X-ray tube horizontal motion of hanging type medical X-ray camera chain, in order to realize the location of X-ray tube, need to provide reliable braking device, in time brake at needed horizontal position by braking device realization X-ray tube carrier.When manually and automatically moving, braking device breaks away from braking surface, and the X-ray tube carrier can be moved easily.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of braking device that can realize in desired location braking is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of braking device, the return unit that comprises fixed base, active base, permanent-magnet electromagnet, armature and the active base that can reset, but active base and fixed base form sliding pair and straight reciprocating motion, be fixed on the fixed base one of in permanent-magnet electromagnet and the armature, in permanent-magnet electromagnet and the armature another is fixed on the active base, be fixed with the brake pad with rubbing surface on the active base, this brake pad moves between primary importance and the second place, when primary importance, permanent-magnet electromagnet and armature break away from; When the second place, permanent-magnet electromagnet and armature adhesive.
Described fixed base is fixed with guide pin bushing, and active base is fixed with guide shaft, has penetrated guide shaft in the guide pin bushing.Described active base is included in mounting plate and the joining plate that lays respectively at the fixed base both sides on the moving direction, guide shaft be connected this mounting plate and joining plate, and brake pad is fixed on the joining plate.The quantity of described guide pin bushing is less than the quantity of guide shaft, and return unit is enclosed within on the guide shaft that does not penetrate guide pin bushing and between fixed base and mounting plate.
Described guide shaft horizontal positioned, the active base horizontal motion is fixed with the carrier that carries X-ray tube on the fixed base.Described active base also comprises cushion block, and cushion block is fixed on the joining plate, and brake pad is fixed on this cushion block.Described return unit is can be at the flexible elastomer of the moving direction of active base.
The rubbing surface of described brake pad is the plane, the move distance of the primary clearance of this rubbing surface and braking surface during less than permanent-magnet electromagnet, armature adhesive.Described brake pad comprises that metallic matrix reaches and the elastomer block of the elastically deformable that it is fixing, and rubbing surface is the surface of elastomer block.The material of described elastomer block is rubber or polyurethane, and return unit is spring.
The invention has the beneficial effects as follows, utilize make a concerted effort to drive active base, the brake pad motion of magnetic force between the active force of return unit and permanent-magnet electromagnet, the armature, make brake pad one of can be in primary importance and the second place compress braking surface during the position, carrier is in time braked in needed position; In the time of need to unclamping carrier, switch the switching electricity condition of permanent-magnet electromagnet, make a concerted effort to make brake pad to move to the another location, make brake pad break away from braking surface, thereby the carrier that is installed on the braking device can move freely.
Description of drawings
Fig. 1 is the structural representation of present embodiment braking device;
Fig. 2 and Fig. 3 are respectively the stereograms at two visual angles of the brake pad of present embodiment braking device.
Embodiment
As shown in Figure 1 to Figure 3, the present embodiment braking device comprises fixed base 17, active base 18, permanent-magnet electromagnet 5, armature 4, return unit 7 and brake pad 12.Fixed base 17 comprises the base plate 1 that keeps flat and the riser 2 of placing vertically, and base plate 1 is fixing, and riser 2 is fixing with base plate 1 by screw 14, and a side of riser 2 is fixed with two guide pin bushings that play the guiding role 3.But active base 18 forms sliding pair and straight reciprocating motion (direction shown in the arrow among Fig. 1) with fixed base 17, active base 18 comprises mounting plate 6 and the joining plate 9 of placing vertically, mounting plate 6 and joining plate 9 lay respectively at the left and right sides of riser 2 in active base 18 moving direction, mounting plate 6 is connected with joining plate by four guide shafts, 8 connections of crossing riser 2, and four guide shaft 8 two guide shafts 8 parallel and that wherein be positioned on the diagonal cross two guide pin bushings 3 simultaneously.Permanent-magnet electromagnet 5 is fixed on mounting plate 6 towards a side of riser 2, and armature 4 is fixed on riser 2 towards a side of mounting plate 6, and permanent-magnet electromagnet 5 is corresponding with armature 4.Return unit 7 has elasticity, and it is located between riser 2 and the mounting plate 6.Brake pad 12 has the rubbing surface 1203 with braking surface (such as the section material guide rail surface) rubbing contact.Brake pad 12 adopts iron plate as matrix 1201, and utilizes rubber perfusion die sinking processing.
During installation, one end of every guide shaft 8 is penetrated corresponding flange 10 and be fixed on the joining plate 9, tightening the first screw 15 makes guide shaft 8 consistent with the length that guarantees each guide shaft 8 with joining plate 9 close contacts, cushion block 11 is fixed on a dorsad side of riser 2 of joining plate 9, makes flange 10, guide shaft 8, joining plate 9 and integral body of cushion block 11 affixed one-tenth; Four guide shafts 8 are crossed riser 2 (wherein two guide shafts 8 cross two guide pin bushings 3 simultaneously), regulate and tighten the second screw 13 after smooth and easy; Two return units 7 are enclosed within on two guide shafts 8 that are on another diagonal; After making permanent-magnet electromagnet 5 aim at corresponding armature 4, be enclosed within mounting plate 6 on four guide shafts 8 and compress return unit 7 until permanent-magnet electromagnet 5 and corresponding armature 4 adhesives, at last, be screwed into guide shaft 8 and tighten with nut 16 and plain cushion and bullet pad.Brake pad 12 is fixed on the cushion block 11.
According to effective adhesive distance of permanent-magnet electromagnet 5, the design braking device in the Stroke Control of moving direction at 0.5～0.7mm.In order to guarantee this trip distance, two guide shafts 8 on a pair of linea angulata are moved in two guide pin bushings 3 of correspondence, guarantee the straightness accuracy of active base motion, 8 of other two guide shafts put return unit 7, and the elastic force by return unit 7 overcomes the remanent magnetism power after the permanent-magnet electromagnet energising.After permanent-magnet electromagnet 5 energising, return unit 7 momentary actions (namely recovering deformation) push away corresponding armature 4 with permanent-magnet electromagnet 5, and straight line motion to flange 10 on the definite moving direction of guide shaft 8 and guide pin bushing 3 such as brake pad 12 parts such as grade contacts with riser 2.After permanent-magnet electromagnet 5 outages, 4 in permanent-magnet electromagnet 5 and armature produce electromagnetic force, pushing return unit 7, the moving direction adhesive that permanent-magnet electromagnet 5 and armature 4 are determined at guide shaft 8 and guide pin bushing 3, promote the part movement such as brake pad 12, make the rubbing surface 1203 of brake pad 12 compress braking surface, thereby the X-ray tube carrier is located.In the installation process, the rubbing surface of adjusting brake pad and the primary clearance to 0.2 of braking surface～0.3mm, thus so that braking device has the effect of wear compensation in the effective adhesive distance of permanent-magnet electromagnet.
For braking device, permanent-magnet electromagnet 5 and armature 4 can be to there being two; Certainly, permanent-magnet electromagnet can only have one or more, and armature also can have one or more.The situation that permanent-magnet electromagnet and armature are corresponding can comprise: permanent-magnet electromagnet and armature is the corresponding armature of corresponding, a plurality of permanent-magnet electromagnets, the corresponding permanent-magnet electromagnet of a plurality of armature one by one.Armature 4 is fixed on the fixed base 17, and permanent-magnet electromagnet 5 is fixed on the active base 18 and can be along with active base 18 straight reciprocating motions; Certainly, also armature can be fixed on the active base, and permanent-magnet electromagnet is fixed on the fixed base.Active base 18 can comprise mounting plate 6 and the joining plate 9 that lays respectively at fixed base 17 both sides; Certainly, also can only comprise mounting plate, or only comprise joining plate; Perhaps other structural type.Move distance during for the straightness accuracy that guarantees active base motion and permanent-magnet electromagnet, armature adhesive can arrange the guide pin bushing and the guide shaft that match, and the quantity of guide pin bushing can have two, also can be one or more; The quantity of guide shaft can arrange as requested.Return unit can be enclosed within on the guide pin bushing, also can be enclosed within on the guide shaft, perhaps is located at other position between fixed base and the active base.Return unit 7 can be spring, also can be that other can be at the flexible elastic element of the moving direction of active base.Brake pad 12 has the rubbing surface 1203 with the braking surface frictional fit, and this rubbing surface 1203 is preferably the plane.Brake pad 12 can comprise that metallic matrix 1201 reaches the elastomer block 1202 of the elastically deformable of fixing with matrix 1201, rubbing surface 1203 is the surface of elastomer block 1202, guaranteed the flatness of intensity, hardness and the rubbing surface of whole brake pad by this structure, when braking, elastomer block 1202 has buffering with the braking surface extruding and reduces the effect of noise, and can prevent that braking surface is worn.The material of elastomer block 1202 such as rubber, polyurethane or other have flexible material (such as nonmetallic material).The move distance of the primary clearance of rubbing surface 1203 and braking surface during preferably less than permanent-magnet electromagnet, armature adhesive, thus the effect of wear compensation had.
For braking device, it adopts permanent-magnet electromagnet, guide shaft guide pin bushing guiding, and return unit resets, and brake pad contacts with braking surface to compress and produces frictional force and horizontal location X-ray tube carrier.This structure has reliable braking, its smoothly adhesive in effective stroke.When permanent-magnet electromagnet is switched on, the instantaneous remanent magnetism that overcomes permanent-magnet electromagnet pushes away section material guide rail (even brake pad is in primary importance) with brake pad under the effect of return unit, the X-ray tube carrier gets final product unrestricted motion, and during this state, return unit is stretched out; When permanent-magnet electromagnet cuts off the power supply, permanent-magnet electromagnet moment adhesive armature, promote brake pad and compress section material guide rail (even brake pad is in the second place), the X-ray tube carrier namely is positioned, during this state, return unit compression, aforementioned return unit are stretched out and are referred to that this compression is in extended state relatively.Stretch out when certainly, return unit also can be in primary importance compression and in the second place; Brake pad also can be braked when primary importance, and breaks away from braking surface when the second place.
Return unit can be the elastomer that can stretch on the moving direction of active base, such as stage clip, extension spring, resilient sleeve etc.; Return unit also can also can play in the moving direction motion of active base for other structure of the active base effect that resets, such as magnet.
Braking device can be realized the timely braking of X-ray tube carrier at needed horizontal position; When changing the placement direction of whole braking device, can realize the timely braking of other device in other position.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. braking device, it is characterized in that: the return unit that comprises fixed base, active base, permanent-magnet electromagnet, armature and the active base that can reset, but active base and fixed base form sliding pair and straight reciprocating motion, fixed base has the fixed board of placing vertically, permanent-magnet electromagnet is fixed on the active base, armature is fixed on the riser, be fixed with the brake pad with rubbing surface on the active base, this brake pad moves between primary importance and the second place, when primary importance, permanent-magnet electromagnet and armature break away from; When the second place, permanent-magnet electromagnet outage and with the armature adhesive; Described fixed base is fixed with guide pin bushing, and active base is fixed with guide shaft, has penetrated guide shaft in the guide pin bushing, and each guide shaft all crosses riser; Described active base is included in mounting plate and the joining plate that lays respectively at the fixed base both sides on the moving direction, guide shaft be connected this mounting plate and joining plate, and brake pad is fixed on the joining plate; The quantity of described guide pin bushing is less than the quantity of guide shaft, and return unit is enclosed within on the guide shaft that does not penetrate guide pin bushing and between fixed base and mounting plate.
2. braking device according to claim 1 is characterized in that: described guide shaft horizontal positioned, the active base horizontal motion is fixed with the carrier of carrying X-ray tube on the fixed base.
3. braking device according to claim 1, it is characterized in that: described active base also comprises cushion block, and cushion block is fixed on the joining plate, and brake pad is fixed on this cushion block.
4. the described braking device of any one according to claim 1-3 is characterized in that: described return unit is can be at the flexible elastomer of the moving direction of active base.
5. the described braking device of any one according to claim 1-3, it is characterized in that: the rubbing surface of described brake pad is the plane, the move distance of the primary clearance of this rubbing surface and braking surface during less than permanent-magnet electromagnet, armature adhesive, this primary clearance is 0.2 ~ 0.3mm.
6. braking device according to claim 5 is characterized in that: described brake pad comprise metallic matrix and with the elastomer block of its fixing elastically deformable, rubbing surface is the surface of elastomer block.
7. braking device according to claim 6, it is characterized in that: the material of described elastomer block is rubber or polyurethane, return unit is spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810217658 CN101737442B (en) | 2008-11-20 | 2008-11-20 | Braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810217658 CN101737442B (en) | 2008-11-20 | 2008-11-20 | Braking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101737442A CN101737442A (en) | 2010-06-16 |
| CN101737442B true CN101737442B (en) | 2013-01-23 |
Family
ID=42461326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810217658 Expired - Fee Related CN101737442B (en) | 2008-11-20 | 2008-11-20 | Braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101737442B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724575A (en) * | 2013-12-23 | 2015-06-24 | 三菱电机上海机电电梯有限公司 | Rolling guide shoe with stopping and vibration absorption functions |
| CN106087272B (en) * | 2016-08-29 | 2022-03-11 | 王贤虎 | Garment piece buckle auxiliary assembly for embedding and clamping machine or looping machine |
| CN106388358A (en) * | 2016-09-30 | 2017-02-15 | 广西大学 | Synchronous tilting chassis and office chair provided with chassis |
| CN106609809B (en) * | 2016-12-30 | 2018-12-21 | 哈尔滨思哲睿智能医疗设备有限公司 | A kind of brake structure for horizontal mobile mechanism |
| CN109099076B (en) * | 2018-09-30 | 2021-01-05 | 中国科学院长春光学精密机械与物理研究所 | Brake for movable shaft |
| CN110255375B (en) * | 2019-06-28 | 2020-10-16 | 管彦传 | Electric trolley type electric hoist |
| CN110985836B (en) * | 2019-12-30 | 2021-09-28 | 昆山国检联信息科技有限公司 | Horizontal rotation unit of camera shooting pan-tilt |
-
2008
- 2008-11-20 CN CN 200810217658 patent/CN101737442B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101737442A (en) | 2010-06-16 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20151120 |
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| EXPY | Termination of patent right or utility model |