CN206680119U

CN206680119U - Negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure

Info

Publication number: CN206680119U
Application number: CN201720459430.9U
Authority: CN
Inventors: 王成孝
Original assignee: Beijing Zhongke Kemei Polytron Technologies Inc
Current assignee: Beijing Zhongke Kemei Polytron Technologies Inc
Priority date: 2017-04-27
Filing date: 2017-04-27
Publication date: 2017-11-28
Anticipated expiration: 2027-04-27

Abstract

The utility model discloses negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure, including pedestal, stepper motor, elevating mechanism and guide rod, the elevating mechanism includes feed screw nut, leading screw, elevating lever, elevating lever guide pin bushing, bellows weldment and lifting fixed plate, the stepper motor is fixed on the pedestal by motor bent plate, the leading screw passes through bellows weldment by feed screw nut, one end connects the stepper motor output shaft by shaft coupling, and the other end is connected by self-aligning ball bearing with lifting fixed plate；The guide rod passes through the bellows weldment by linear bearing, and both ends are separately fixed on lifting fixed plate and pedestal, and through lifting fixed plate, lower end is welded and fixed the elevating lever with bellows weldment；While solving the problems, such as that cathode assembly is lifted in vacuum environment, ensure the high accuracy, low noise, stable, simple and compact for structure of apparatus for automatically lifting transmission.

Description

Negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure

Technical field

A kind of lowering or hoisting gear is the utility model is related to, it particularly relates to which negative electrode is automatic in a kind of photomultiplier processing procedure Lowering or hoisting gear.

Background technology

In the prior art, elevating mechanism realizes the lifting of object by motor driven screw-threaded shaft elevator, in photomultiplier transit During pipe manufacture, cathode assembly needs to realize elevating function in vacuum environment, and is rubbed between moving component under high vacuum environment Wipe factor to increase, frictional heat can not be conducted to take away by gaseous exchange, and lubricant grease is volatile and easily pollutes internal part, be passed System elevating mechanism can not be applicable, therefore be badly in need of a kind of high transmission accuracy, low noise, adaptation stable, simple and compact for structure very The apparatus for automatically lifting of Altitude.

Utility model content

For the above-mentioned technical problem in correlation technique, the utility model proposes negative electrode in a kind of photomultiplier processing procedure from Dynamic lowering or hoisting gear, cathode assembly is can solve the problem that vacuum environment is lifted the problem of, and make apparatus for automatically lifting transmission accuracy It is high and low noise, stable, simple and compact for structure.

In order to solve the above technical problems, the technical scheme that the utility model uses is：

Negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure is provided, including pedestal, stepper motor, elevating mechanism and Guide rod, the elevating mechanism, which includes feed screw nut, leading screw, elevating lever, elevating lever guide pin bushing, bellows weldment and lifting, to be fixed Plate, the stepper motor are fixed on the pedestal by motor bent plate, and the leading screw is welded by feed screw nut through bellows Part, described leading screw one end connect the stepper motor output shaft by shaft coupling, and the leading screw other end passes through self-aligning ball bearing It is connected with lifting fixed plate；The guide rod passes through the bellows weldment, the guide rod both ends difference by linear bearing It is fixed on lifting fixed plate and pedestal, the elevating lever passes through lifting fixed plate, the elevating lever lower end and bellows weldment It is welded and fixed, the elevating lever passes through the cathode chamber of vacuum, the elevating lever upper end and cathode assembly by elevating lever guide pin bushing Bolt is fixedly connected.

Further, in addition to position-limit mechanism, the position-limit mechanism include limit switch and triggering block, the limit switch Fix on the guide bar, the triggering block is fixed on bellows weldment.

Further, it is connected with bellows between the bellows weldment and cathode chamber.

Further, the bellows is in hollow structure, and the elevating lever passes through the bellows.

Further, the elevating lever guide pin bushing is process using tin bronze.

Further, the elevating lever guide pin bushing is arranged on the center of the cathode chamber bottom.

The beneficial effects of the utility model：The utility model proposes negative electrode automatic lifting in a kind of photomultiplier processing procedure to fill Put, while solving the problems, such as that cathode assembly is lifted in vacuum environment, ensure that apparatus for automatically lifting transmission high accuracy, It is low noise, stable, simple and compact for structure.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description are only of the present utility model Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this A little accompanying drawings obtain other accompanying drawings.

Fig. 1 is the structural representation of the preferred embodiment of apparatus for automatically lifting one of the present utility model；

Fig. 2 is Fig. 1 top views；

Fig. 3 is the diagrammatic cross-section in A-A directions in Fig. 2；；

Fig. 4 is mplifying structure schematic diagram at B in Fig. 3；

Fig. 5 is mplifying structure schematic diagram at C in Fig. 3.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, every other embodiment that those of ordinary skill in the art are obtained all belongs to In the scope of the utility model protection.

As Figure 1-5, according to negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure described in the utility model, Including pedestal 1, stepper motor 2, elevating mechanism 3 and guide rod 4, the elevating mechanism 3 includes feed screw nut 31, leading screw 32, risen Bar 33, elevating lever guide pin bushing 34, bellows weldment 35 and lifting fixed plate 36, the stepper motor 2 is dropped to fix by motor bent plate On the pedestal 1, the leading screw 32 passes through bellows weldment 35 by feed screw nut 31, and described one end of leading screw 32 passes through shaft coupling Device connects the output shaft of stepper motor 2, and the other end of leading screw 32 is connected by self-aligning ball bearing with lifting fixed plate 36；Institute State guide rod 4 and the bellows weldment 35 is passed through by linear bearing, the both ends of guide rod 4 are separately fixed at lifting fixed plate 36 and pedestal 1 on, the elevating lever 33 is solid through lifting fixed plate 36, the welding of the lower end of elevating lever 33 and bellows weldment 35 Fixed, the elevating lever 33 passes through the cathode chamber 6 of vacuum, the upper end of elevating lever 33 and cathode assembly by elevating lever guide pin bushing 34 7 bolts are fixedly connected so that cathode assembly 7 is with elevating mechanism 3 with liter with drop.

When specifically used, in addition to position-limit mechanism 5, the position-limit mechanism 5 include limit switch 51 and triggering block 52, institute State limit switch 51 to be fixed on guide rod 4, the triggering block 52 is fixed on bellows weldment 35；In triggering block 52 with ripple In the lifting process of pipe weldment 35, when triggering block 52 contacts with limit switch 51, elevating mechanism 3 stops lifting immediately.

Also include cathode chamber 6 and cathode assembly 7, the elevating lever 33 passes through the negative electrode of vacuum by elevating lever guide pin bushing 34 Chamber 6, upper end are fixedly connected with the bolt of cathode assembly 7 so that cathode assembly 7 is with elevating mechanism 3 with liter with drop.

Bellows 8 is connected between the bellows weldment 35 and cathode chamber 6, the bellows 8 is in hollow structure, the liter Drop bar 33 passes through the bellows 8, because there is the bellows 8 scalability make it that its is flexible, passes through liter so as to reduce Drop bar 33 and promote and shaken caused by cathode assembly 7.

The elevating lever guide pin bushing 34 is process using tin bronze, installed in the center of the bottom of cathode chamber 6；Utilize Tin bronze hardness is high, and wearability is fabulous and is not likely to produce the characteristic of deadlock phenomenon, and pole length is long makes for lifting when reducing motion Into shake, the concentricity of cathode assembly 7 and cathode chamber 6, and the elevating lever guide pin bushing under high vacuum environment has been effectively ensured 34 have good oil-free lubrication performance, frictional force problems of too caused by alleviating vacuum cold welding.

In summary, by means of above-mentioned technical proposal of the present utility model, the utility model proposes a kind of photomultiplier Negative electrode apparatus for automatically lifting in processing procedure, while solving the problems, such as that cathode assembly is lifted in vacuum environment, it ensure that certainly It is dynamic lowering or hoisting gear transmission high accuracy, low noise, stable, simple and compact for structure.

Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in Protection domain within.

Claims

1. negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure, including pedestal (1), stepper motor (2), elevating mechanism And guide rod (3)（4）, it is characterised in that the elevating mechanism（3）Including feed screw nut（31）, leading screw（32）, elevating lever （33）, elevating lever guide pin bushing（34）, bellows weldment（35）With lifting fixed plate（36）, the stepper motor (2) is curved by motor Plate is fixed on the pedestal (1), the leading screw（32）Pass through feed screw nut（31）Through bellows weldment（35）, the leading screw （32）One end connects the stepper motor (2) output shaft, the leading screw by shaft coupling（32）The other end passes through self-aligning ball bearing With lifting fixed plate（36）Connection；The guide rod（4）The bellows weldment is passed through by linear bearing（35）, the guiding Bar（4）Both ends are separately fixed at lifting fixed plate（36）On pedestal (1), the elevating lever（33）Through lifting fixed plate （36）, the elevating lever（33）Lower end and bellows weldment（35）It is welded and fixed, the elevating lever（33）Pass through elevating lever guide pin bushing （34）Through the cathode chamber of vacuum（6）, the elevating lever（33）Upper end and cathode assembly（7）Bolt is fixedly connected.

2. negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure according to claim 1, it is characterised in that also wrap Include position-limit mechanism（5）, the position-limit mechanism（5）Including limit switch（51）And triggering block（52）, the limit switch（51）Gu It is scheduled on guide rod（4）On, the triggering block（52）It is fixed on bellows weldment（35）On.

3. negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure according to claim 2, it is characterised in that described Bellows weldment（35）With cathode chamber（6）Between be connected with bellows（8）.

4. negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure according to claim 3, it is characterised in that described Bellows（8）In hollow structure, the elevating lever（33）Through the bellows（8）.

5. negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure according to claim 1, it is characterised in that described Elevating lever guide pin bushing（34）It is process using tin bronze.

6. negative electrode apparatus for automatically lifting in a kind of photomultiplier processing procedure according to claim 5, it is characterised in that described Elevating lever guide pin bushing（34）Installed in the cathode chamber（6）The center of bottom.