CN201012860Y

CN201012860Y - Scale division rotating pedestal

Info

Publication number: CN201012860Y
Application number: CNU2007200666569U
Authority: CN
Inventors: 朱汝平; 糜卫东; 徐菁; 覃健; 顾培
Original assignee: SHANGHAI LIBAO SCI-TECH Co Ltd
Current assignee: SHANGHAI LIBAO SCI-TECH Co Ltd
Priority date: 2007-01-25
Filing date: 2007-01-25
Publication date: 2008-01-30
Anticipated expiration: 2017-01-25

Abstract

The utility model discloses an indexing rotation cabinet base, which comprises a frame box (18), a worm gear (17) and a worm gear driving device such as a motor. The utility model also comprises an annular helical gear (8) and a bearing disk (7). Two ends of the worm gear are capable to purport in rotated way in the frame box (18). The worm gear (17) is meshing with a centering device fixed in the frame box (18), comprising the annular helical gear (8) fixed on the core sleeve (15) with external bench. Axial line of the worm gear (17) is vertical to that of the annular helical gear (8). The bearing disk (7) is arranged on top of the annular helical gear (8). The indexing rotation cabinet base can be applied in conditions with requirements of precision indexing. Therefore precise indexing and rotation is realized and the bearing weight of the machine is capable of rising to greater range. Service life of the machine is also long.

Description

The calibration spin stand platform

Technical field

The utility model relates to a kind of mechanism that is used to carry the rotation of needs realization calibration, specifically is a kind of calibration spin stand platform.

Background technology

Generally all there is following shortcoming in the calibration spin stand platform of prior art:

One, existing design generally all adopts worm and gear engaged transmission mode, and the vertical rotation that changes horizontally rotating of worm screw into worm gear realizes the change of power direction.But, can't guarantee the accuracy requirement of calibration during startup, so this type of mechanism can not be used to have the occasion of precision indexing requirement because the idle running difference of worm and gear engagement system is bigger.

Two, existing design is owing to be subjected to space constraint, worm screw to have only an end bearing on chassis box.When loaded object, because the worm screw unbalance stress, so, can only the very light object of load capacity.

Three, the worm gear of the vertical rotation in the existing design only is placed in the middle of a pair of contiguous block by a circle ball, and ball is disposable to be enclosed between two contiguous blocks.And ball hardness ratio contiguous block is a lot of greatly, and ball grooves easily weares and teares on the contiguous block, and then ball has very big play in ball grooves, so when worm gear rotated, center of turn will be offset, and influences precision; Because the difficult dismounting of this enclosed construction can not be changed contiguous block, therefore, the service life of this mechanism is very short again.

The utility model content

The technical problems to be solved in the utility model is to provide a kind of precision indexing that can be used to have precision indexing requirement occasion can realize loaded object to rotate, can guarantee that its load capacity expands the calibration spin stand platform of wider and long service life to.

Technical solution of the present utility model is, a kind of calibration spin stand platform with following structure is provided, and it comprises chassis box and worm screw and worm drive device, and it also comprises annular helical wheel and carrier; The two ends rotatable support of worm screw is in chassis box, and worm screw meshes with the rotatable annular helical wheel that is installed on the spotting device that is fixed in the chassis box, and the axis of worm screw is vertical mutually with annular helical gear axis; Carrier is installed in annular helical gear top.

During work, worm drive device such as motor drives worm screw are around self rotational, power is directly delivered on the helical wheel by the working portion of worm screw, and this moment, helical wheel rotated around the center of spotting device such as core retainer plate, rotated together thereby drive the carrier that is installed in the helical wheel top.

After adopting above structure, the utility model is compared with the calibration spin stand platform of prior art, has the following advantages:

One, because the idle running difference of helical wheel and worm mesh type of drive is little a lot of than worm and gear engaged transmission mode, when starting, helical wheel and worm screw mesh rapidly, it is very fast that motion is passed to helical gear speed by worm screw, to guarantee the accuracy requirement of calibration, so this type of mechanism can be used for having the occasion of precision indexing requirement can realize that the precision indexing of loaded object rotates, and can play a role in wider field.

Two, since the two ends rotatable support of worm screw in chassis box, when loaded object, worm screw is stressed evenly, so the weight range of loaded object enlarges at double.

Three, because helical wheel rotates around the center of spotting device, and helical wheel center of turn generation out-of-position possibility reduces significantly, has further guaranteed its high precision, prolong its service life significantly.

As improvement, its spotting device can adopt the concrete structure of convenient disassembly, and tumbler wherein can adopt long a lot and change bearing such as ball bearing of main shaft easily than the ball grooves life-span, and this has further prolonged the service life of this calibration spin stand platform.

Description of drawings

Fig. 1 is the calibration spin stand platform cross-sectional structure scheme drawing of prior art.

Fig. 2 is the contour structures scheme drawing of the utility model calibration spin stand platform.

Fig. 3 is the sectional structure scheme drawing along the A-A line among Fig. 2.

Fig. 4 is the sectional structure scheme drawing along the B-B line among Fig. 2.

Fig. 5 is part assembling (blast) scheme drawing of the main portion of the utility model calibration spin stand platform.

Shown in the figure 1, former worm screw, 2, former worm gear, 3, former chassis box, 4, former ball, 5, former contiguous block I, 6, former contiguous block II; 7, carrier, 8, helical wheel, 9 bearing cap shims, 10, the axial limiting cover, 11, packing ring, 12, head bearing, 13, little spacer, 14, lower bearing, 15, core retainer plate, 16, the foundation ring, 17, worm screw, 18, chassis box, 19, nut, 20, the bearing of flanged dish, 21, the chassis, 22, electrical motor, 23, coupler, 24, worm hole, 25, gear hole.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

In Fig. 1, the former worm screw 1 of the calibration spin stand platform of prior art has only an end bearing on former chassis box 3, is installed in the former worm gear 2 and former worm screw 1 engagement on former chassis box 3 tops, to realize the change of power direction.One circle ball 4 is placed between contiguous block I5 and the contiguous block II6 ball 4 disposable being enclosed between two

contiguous blocks

5,6.

As Fig. 2, Fig. 3, Fig. 4, shown in Figure 5.

The utility model calibration spin stand platform comprises chassis box 18 and worm screw 17 and worm drive device, and it also comprises annular helical wheel 8 and carrier 7 etc.

The two ends rotatable support of worm screw 17 is in chassis box 18: worm screw 17 is arranged in the worm hole 24 of chassis box 18 1 ends (Fig. 3 is a left end), and the two ends of worm screw 17 are rotatably supported in the two ends of worm hole 24 through bearing.Described bearing, present embodiment adopt flanged dish (rolling) bearing 20, i.e. the cylindrical flush fit of the two end axles of the interior circle of the bearing 20 of flanged dish and worm screw 17, the interior round flush fit at the cylindrical of the bearing 20 of flanged dish and worm hole 25 two ends.The restricted worm screw 17 in two ends of worm screw 17 and worm hole 24 is along the device of worm hole 24 end float misalignments, present embodiment adopts following concrete structure: on the cylindrical of the bearing 20 of two flanged dishes the axial limiting step is arranged all, screw thread is arranged on the worm screw 17 of the axial outer end of its flange and screw the nut 19 that tightens up with it.

Described worm drive device present embodiment adopts electrical motor 22, and it is installed on outer chassis box 18 sidewalls of worm hole 25 1 ends (being right-hand member among Fig. 4).The axle of electrical motor 22 is connected through coupler 23 with worm screw 17 coaxial lines and both, and in other words, the center of turn of electrical motor 22 is realized overlapping by coupler 23 with the center of turn of worm screw 17.

Worm screw 17 and rotatable annular helical wheel 8 engagements that are installed on the spotting device that is fixed in the chassis box 18, carrier 7 is installed in the top of annular helical wheel 8.The described spotting device that is fixed in the chassis box 18, present embodiment refer to that the bottom has the core retainer plate 15 of outer step to be spirally connected on (connecting with screw) chassis 21 in the gear hole 25 of chassis box 18.The described rotatable top that annular helical wheel 8 on the spotting device and carrier 7 are installed in annular helical wheel 8 that is installed in, present embodiment adopts following concrete structure: lower bearing 14, septulum cover 13, head bearing 12, axial limiting cover 10 and bearing cap shim 9 are housed on the outer step of core retainer plate 15 from bottom to up in proper order, and bearing cap shim 9 is screwed onto the top of core retainer plate 15.Lower bearing 14 and head bearing 12 all can adopt antifriction-bearing box.The radial wall thickness of the outer step of core retainer plate 15 is roughly half of radial wall thickness of lower bearing 14; The radial wall thickness of axial limiting cover 10 is roughly half of radial wall thickness of head bearing 12; The radial wall thickness of septulum cover 13 is roughly half of radial wall thickness of head bearing 12 (being lower bearing 14).Interior circle and the inner ring of head bearing 12 and the cylindrical flush fit of core retainer plate 15 of the inner ring of described lower bearing 14, septulum cover 13, the top end face flush fit of the bottom face of described lower bearing 14 inner rings and the outer step of core retainer plate 15, the bottom face flush fit of the top end face of described head bearing 12 inner rings and axial limiting cover 10.One packing ring 11 is arranged on the top end face of the outer ring of described head bearing 12.The interior circle of described annular helical wheel 8 is locked on the cylindrical of lower bearing 14 and head bearing 12.The radially major part of carrier 7 is screwed onto on the top end face of annular helical wheel 8, its radially in the bottom face of convex portion be pressed on the top end face of packing ring 11.The radially major part of foundation ring 16 is screwed onto on the bottom face of annular helical wheel 8, its radially in the bottom face of outer ring of the top end face of convex portion and lower bearing 14 be close to.The axial location of the inner ring of described head bearing 12, lower bearing 14 is limited by step, septulum cover 13, axial limiting cover 10 and the bearing cap shim 9 of core retainer plate 15 from bottom to up successively.The upper and lower two ends of the axial location of the outer ring of head bearing 12, lower bearing 14 are limited by foundation ring 16 and packing ring 11 and bearing cap shim 9.The axis of worm screw 17 is vertical mutually with the axis of annular helical wheel 8.Described worm screw 17 and annular helical wheel 8 engagements, present embodiment refers to that described worm hole 24 radially communicates with gear hole 25, and the helical teeth (all not drawing among the helical teeth figure of helical teeth of worm screw 17 and annular helical wheel 18) on helical teeth of described worm screw 17 and described annular helical wheel 8 cylindricals is meshing with each other.

Claims

1. calibration spin stand platform, it comprises chassis box and worm screw and worm drive device, it is characterized in that: it also comprises annular helical wheel (8) and carrier (7); The two ends rotatable support of worm screw (17) is in chassis box (18), worm screw (17) and rotatable annular helical wheel (8) engagement that is installed on the spotting device that is fixed in the chassis box (18), the axis of worm screw (17) is vertical mutually with the axis of annular helical wheel (8); Carrier (7) is installed in the top of annular helical wheel (8).

2. calibration spin stand platform according to claim 1, it is characterized in that: the two ends rotatable support of described worm screw (17) refers in chassis box (18), worm screw (17) is positioned at the worm hole (24) of chassis box (18) one ends, the two ends of worm screw (17) are rotatably supported in the two ends of worm hole (24) through bearing, and the restricted worm screws in two ends (17) of worm screw (17) and worm hole (24) are along the device of worm hole (24) end float misalignment.

3. calibration spin stand platform according to claim 1 and 2, it is characterized in that: described worm drive device refers to electrical motor (22), it is installed on the outer chassis box (18) of worm hole (24) one ends, and the axle of electrical motor (22) is connected through coupler (23) with worm screw (17) coaxial line and both.

4. calibration spin stand platform according to claim 2, it is characterized in that: the two ends of worm screw (17) are rotatably supported in the two ends of worm hole (24) and described restriction worm screw (17) device along worm hole (24) end float misalignment through bearing, the cylindrical flush fit that refers to the two end axles of the interior circle of bearing (20) of flanged dish and worm screw (17), the interior round flush fit at its cylindrical and worm hole (25) two ends; On the cylindrical of the bearing of two flanged dishes (20) the axial limiting step is arranged all, screw thread is arranged on the worm screw of its axial outer end (17) and screw the nut (19) that tightens up with it.

5. calibration spin stand platform according to claim 1 is characterized in that: the described spotting device that is fixed in the chassis box (18) refers to that the bottom has the core retainer plate (15) of outer step to be screwed onto on the interior chassis (21) of the gear hole (25) of chassis box (18).

6. calibration spin stand platform according to claim 1 or 5, it is characterized in that: describedly rotatable be installed in the top that annular helical wheel (8) on the spotting device and carrier (7) be installed in annular helical wheel (8) and refer to, in proper order lower bearing (14), little spacer (13), head bearing (12), axial limiting cover (10) and bearing cap shim (9) are housed from bottom to up on the outer step of core retainer plate (15), bearing cap shim (9) is screwed onto the top of core retainer plate (15); The radial wall thickness of the outer step of core retainer plate (15) is roughly half of radial wall thickness of lower bearing sleeve (14); The radial wall thickness of axial limiting cover (10) is roughly half of radial wall thickness of head bearing (12); The interior circle of the inner ring of described lower bearing (14), little spacer (13) and head bearing (the cylindrical flush fit of 120 inner ring and core retainer plate (15), the top end face flush fit of the bottom face of described lower bearing (14) inner ring and the outer step of core retainer plate (15), the top end face of described head bearing (12) inner ring and the bottom face flush fit of axial limiting cover (10); One packing ring (11) is arranged on the top end face of the outer ring of described head bearing (12); The interior circle of described annular helical wheel (8) is locked on the cylindrical of lower bearing 14 and head bearing 12; The radially major part of carrier (7) is screwed onto on the top end face of annular helical wheel 8, its radially in the bottom face of convex portion be pressed on the top end face of packing ring 11; The radially major part of foundation ring (16) is screwed onto on the bottom face of annular helical wheel (8), its radially in the bottom face of outer ring of the top end face of convex portion and lower bearing (14) be close to.

7. according to claim 1 or 2 or 5 described calibration spin stand platforms, it is characterized in that: described worm screw (17) refers to annular helical wheel (8) engagement, described worm hole (24) radially communicates with gear hole (25), and the helical teeth on helical teeth of described worm screw (17) and described annular helical wheel (8) cylindrical is meshing with each other.