CN204900731U

CN204900731U - Zero clearance turning device

Info

Publication number: CN204900731U
Application number: CN201520593615.XU
Authority: CN
Inventors: 梁海鹏; 成希革; 黄吉发
Original assignee: Shinva Medical Instrument Co Ltd
Current assignee: Shinva Medical Instrument Co Ltd
Priority date: 2015-08-07
Filing date: 2015-08-07
Publication date: 2015-12-23
Anticipated expiration: 2025-08-07

Abstract

The utility model relates to a medical instrument for the radiodiagnosis, concretely relates to zero clearance turning device, vice including initiative pivot, support arm shaft bearing, drive arrangement, box support and ball, it is vice that the vice one side of ball is equipped with linear guide, and the opposite side is equipped with link mechanism, link mechanism includes driving lever and passive pole, is equipped with the screw seat on ball is vice, is equipped with the slider on linear guide is vice, the screw seat is connected with the slider on the one hand, and on the other hand is connecting the driving lever, and passive pole is being connected through pivot and bearing to the driving lever, and the pivot of taking the initiative is being connected to passive pole, and the box support is passed in the initiative pivot, the utility model discloses cooperateing through motor gear and lead screw gear, turning into the upset through lead screw, link mechanism etc. With linear motion and move, the upset motion can realize 90 degrees flip vertical, and the clearance between motor gear and the lead screw gear is adjustable, can realize the zero clearance transmission to in the switching process, rocking can not appear in the machine yet.

Description

Gapless upender

Technical field

The utility model relates to a kind of radiodiagnosis medical apparatus, is specifically related to a kind of gapless upender.

Background technique

At present, along with the develop rapidly of radiotherapy technology, the requirement of people to radiotherapy apparatus is more and more higher, EPID is as the indispensable equipment of accurate radiotherapy, therefore its control of transmitting motion intermediate gap will play vital effect, existing radiodiagnosis switching mechanism many employings turbine and worm mechanism, be limited by level of processing domestic at present, gap between turbine and worm, gap between gear is difficult to control, thus when causing flip-flop movement to stop or starting, machine there will be and rocks, finally cause locating inaccuracy, there is error in diagnosis, have a strong impact on result for the treatment of.

Model utility content

In order to the deficiency in solving the problems of the technologies described above, the purpose of this utility model is: provide a kind of gapless upender, can realize gapless driving, stopping that can be stable in the arbitrary position of 0-90 degree, and there will not be and rock.

The technological scheme that the utility model adopts for its technical problem of solution is:

Described gapless upender, comprise active rotating shaft, support arm shaft bearing, antinose-dive leg and ball screw pair, the side of ball screw pair is provided with linear guide pairs, opposite side is provided with linkage mechanism, described linkage mechanism comprises driving lever and by lever, ball screw pair is provided with nut seat, linear guide pairs is provided with slide block, described nut seat is connected with slide block on the one hand, be connected to driving lever on the other hand, driving lever is connected to by lever by rotating shaft and bearing, active rotating shaft is connected to by lever, active rotating shaft is through antinose-dive leg, described ball screw pair lower end is also provided with drive unit.

Further preferably, drive unit comprises driving seat and motor, drive on seat and be fixed wtih motor flange, motor is fixed on motor flange, and motor lower end is provided with motor shaft, and motor shaft periphery is overlapped from inside to outside successively motor gear and motor bearing seat, motor bearings is provided with between motor gear and motor bearing seat, motor bearing seat is fixed on and drives on seat, and motor gear side is provided with screw gear, is arranged with lead screw shaft bearing outside screw gear.

Further preferably, motor flange and be provided with the gap of 0-0.5mm between motor bearing seat and driving seat, this gap is expanding slot, thus gap can be made to reach minimum value, realizes gapless driving.

Further preferably, nut seat is connected with driving lever with bearing by rotating shaft.

Compared with prior art, the utility model has following beneficial effect:

The utility model structure is simple, mainly matched with screw gear by motor gear, be flip-flop movement through leading screw, linkage mechanism etc. by transform linear motion, flip-flop movement can realize the flip vertical of 90 degree, gap between motor gear and screw gear is adjustable, can realize gapless driving, and in umklapp process, machine also there will not be and rocks.

Accompanying drawing explanation

Fig. 1 the utility model left view;

Fig. 2 the utility model plan view;

Fig. 3 the utility model plan view;

Fig. 4 the utility model driving device structure schematic diagram.

In figure: 1, support arm shaft bearing; 2, casing is reversed; 3, drive unit; 4, nut seat; 5, driving lever; 6, ball screw pair; 7, by lever; 8, active rotating shaft; 9, linear guide pairs; 10, slide block; 11, seat is driven; 12, lead screw shaft bearing; 13, screw gear; 14, motor gear; 15, motor bearings; 16, motor bearing seat; 17, motor flange; 18, motor.

Embodiment

Below in conjunction with accompanying drawing, the utility model embodiment is described further:

As Figure 1-4, gapless upender described in the utility model, comprise active rotating shaft 8, support arm shaft bearing 1, antinose-dive leg and ball screw pair 6, the side of ball screw pair 6 is provided with linear guide pairs 9, opposite side is provided with linkage mechanism, described linkage mechanism comprises driving lever 5 and by lever 7, ball screw pair 6 is provided with nut seat 4, linear guide pairs 9 is provided with slide block 10, described nut seat 4 one aspect is connected with slide block 10, be connected to driving lever 5 on the other hand, driving lever 5 is connected to by lever 7 by rotating shaft and bearing, active rotating shaft 8 is connected to by lever 7, active rotating shaft 8 is through antinose-dive leg, described ball screw pair 6 lower end is also provided with drive unit 3.

Wherein, drive unit 3 comprises driving seat 11 and motor 18, drive on seat 11 and be fixed wtih motor flange 17, motor 18 is fixed on motor flange 17, and motor 18 lower end is provided with motor shaft, and motor shaft periphery is overlapped from inside to outside successively motor gear 14 and motor bearing seat 16, motor bearings 15 is provided with between motor gear 14 and motor bearing seat 16, motor bearing seat 16 is fixed on and drives on seat 11, and motor gear 14 side is provided with screw gear 13, is arranged with lead screw shaft bearing 12 outside screw gear 13; Motor flange 17 and motor bearing seat 16 and drive the gap being provided with 0-0.5mm between seat 11, this gap is expanding slot, thus gap can be made to reach minimum value, realizes gapless driving; Nut seat 4 is connected with driving lever 5 with bearing by rotating shaft.

Principle of the present utility model:

As Figure 1-3, drive unit 3 by power by gear transmission to ball screw pair 6, the nut seat 4 of ball screw pair 6 is connected with the slide block 10 of linear guide pairs 9, thus can ensure that nut seat 4 moves point-blank, nut seat 4 is connected with driving lever 5 with bearing by rotating shaft simultaneously, driving lever 5 is connected again with by lever 7, both can do rotation motion, be the rotation motion of linkage mechanism by the transform linear motion of nut seat 4 thus, by lever 7 by active rotating shaft 8 be reversed casing 2 and be connected, active rotating shaft 8 is through antinose-dive leg, antinose-dive leg is fixed on frame or certain stationary object, the rotation motion of linkage mechanism can be converted into the flip-flop movement being reversed casing 2 thus.

As shown in Figure 4, motor bearings 15 can make gear and motor bearing seat 16 relatively rotate, motor flange 17 and motor bearing seat 16 are all fixed on and drive on seat 11, and there is gap between both and driving seat 11, this gap is expanding slot, eliminate the gap between motor gear 14 and screw gear 13 thus, thus realize the effect of gapless driving.

Claims

1. a gapless upender, comprise active rotating shaft (8), support arm shaft bearing (1), antinose-dive leg and ball screw pair (6), it is characterized in that, the side of ball screw pair (6) is provided with linear guide pairs (9), opposite side is provided with linkage mechanism, described linkage mechanism comprises driving lever (5) and by lever (7), ball screw pair (6) is provided with nut seat (4), linear guide pairs (9) is provided with slide block (10), described nut seat (4) is connected with slide block (10) on the one hand, be connected to driving lever (5) on the other hand, driving lever (5) is connected to by lever (7) by rotating shaft and bearing, active rotating shaft (8) is connected to by lever (7), active rotating shaft (8) is through antinose-dive leg, described ball screw pair (6) lower end is also provided with drive unit (3).

2. gapless upender according to claim 1, it is characterized in that, drive unit (3) comprises driving seat (11) and motor (18), drive on seat (11) and be fixed wtih motor flange (17), motor (18) is fixed on motor flange (17), motor (18) lower end is provided with motor shaft, motor shaft periphery is overlapped from inside to outside successively motor gear (14) and motor bearing seat (16), motor bearings (15) is provided with between motor gear (14) and motor bearing seat (16), motor bearing seat (16) is fixed on and drives on seat (11), motor gear (14) side is provided with screw gear (13), lead screw shaft bearing (12) is arranged with outside screw gear (13).

3. gapless upender according to claim 2, is characterized in that, motor flange (17) and motor bearing seat (16) and drive the gap being provided with 0-0.5mm between seat (11), and this gap is expanding slot.

4. gapless upender according to claim 1, is characterized in that, nut seat (4) is connected with driving lever (5) with bearing by rotating shaft.