CN207086951U - A kind of top adjustment spacer - Google Patents

Abstract

A kind of top adjustment spacer, the center of the adjustment spacer is provided with the mounting hole for being used for being arranged on top shaft end boss, adjustment spacer has the interior contact surface being oppositely arranged and external contacting surface, interior contact surface therein contacts with the needle bearing on tail spindle, external contacting surface contacts with the disk spring on tail spindle, the inwall of mounting hole is provided with the first order step from the outside contact surface extension of interior contact surface, second level step and interval body, second level step shares a side being radially arranged along adjustment spacer with interval body, width of the first order step along adjustment spacer axial direction is less than width of the second level step along adjustment spacer axial direction, height of the first order step along adjustment spacer radial direction is less than height of the second level step along adjustment spacer radial direction.By setting multi-stage stairs in adjustment spacer inner chamber, axially position is played a part of to bearing；Prevent the leakage of top lubricating oil in the course of the work.

Description

A kind of top adjustment spacer

Technical field

It the utility model is related to top technical field, and in particular to a kind of top adjustment spacer.

Background technology

It is top to be divided into preceding top and back centre, for feeling relieved and bearing the gravity and cutting force of workpiece.Wherein, it is preceding top straight Connect in lathe spindle taper hole；Back centre is divided into stationary center and live center, in use, back centre is inserted into tail stock In the taper hole of sleeve.It is top including centre head, housing and installation tail spindle in the housing, pacify between tail spindle and housing Multiple bearing groups are filled, tail spindle afterbody is additionally provided with the adjustment spacer being located between bearing and disk spring, tune of the prior art The structure type and assembly method of whole spacer are as shown in figure 1, the internal diameter of adjustment spacer one end is more than the internal diameter of bearing outer ring, adjustment The groove for being used for storing lubricating oil is provided with spacer, but the adjustment spacer, in actual use, there are the following problems：Adjust spacer Go out to have the leakage of lubricating oil；Adjustment spacer bears the scarce capacity of axial force and radial load, uses the top of the adjustment spacer Bearing capacity be only 10 tons.

Utility model content

The purpose of this utility model is to provide a kind of top adjustment spacer, and the shape and structure of spacer is adjusted by improving, Prevent the leakage of top lubricating oil in the course of the work.

Used technical scheme is the utility model to achieve the above object：A kind of top adjustment spacer, the adjustment The center of spacer is provided with the mounting hole for being used for being arranged on top shaft end boss, and adjustment spacer has the interior contact being oppositely arranged Face and external contacting surface, interior contact surface therein contact with the needle bearing on tail spindle, and external contacting surface is with being arranged on top Disk spring contact on spivot, the inwall of mounting hole are provided with the first order step from the outside contact surface extension of interior contact surface, the Two stage steps and interval body, second level step share a side being radially arranged along adjustment spacer with interval body, wherein, first Level step is less than width of the second level step along adjustment spacer axial direction, the adjustment of first order step edge along the axial width of adjustment spacer The height of spacer radial direction is less than height of the second level step along adjustment spacer radial direction.

Preferably, interior contact surface and the roughness Ra of external contacting surface requirement be：Ra≤1.6μm.

Preferably, the roughness Ra requirement for adjusting spacer outer peripheral face radially is：Ra≤1.6μm.

In the utility model, width L1, second level step edge adjustment spacer axle of the first order step along adjustment spacer axial direction To width L3 ratio along adjustment spacer axial direction of width L2 and interval body be L1：L2：L3=1：3：2.

In the utility model, height H1 and second level step edge adjustment spacer footpath of the first order step along adjustment spacer radial direction To height H2 ratio be H1：H2=1：3.

In the utility model, the internal diameter of first order step is more than the internal diameter of needle bearing outer ring, at work, adjusts spacer The retainer of bearing can be made not stress and indeformable, improve the service life of bearing；The internal diameter of second level step is more than top The external diameter of axle, i.e. second level step coordinate with tail spindle in gap.

Beneficial effect：（1）, the utility model set between needle bearing and disk spring adjustment spacer, biography can be made It is steady to be presented to the pressure of bearing, protection bearing is injury-free, furthermore it is possible to be spaced disk spring, protects bearing not frayed.Should Axial force and radial load that spacer can be larger are adjusted, top bearing capacity of the present utility model is up to 30 tons, running accuracy Reach 0.005mm.

（2）, by setting multi-stage stairs in adjustment spacer inner chamber, the overall shaft shoulder or bearing seating shoulder can be substituted, to bearing Play a part of axially position；Avoid the direct contact between metal, reach vibration damping, avoid abrasion effect, sealing and dustproof, Prevent the leakage of top lubricating oil in the course of the work.

（3）, the utility model adjustment spacer in contact surface, external contacting surface, outer peripheral face roughness Ra requirement be：Ra≤ 1.6 μm, reduce adjustment spacer outer peripheral face and top shaft housing between, adjustment spacer interior contact surface and bearing between, adjustment The rate of wear between the external contacting surface and disk spring of spacer, improve the service life of adjustment spacer.

Brief description of the drawings

Fig. 1 is the assembling schematic diagram of the top adjustment spacer of prior art；

Fig. 2 is the schematic diagram of adjustment spacer of the present utility model；

Fig. 3 is Fig. 2 and top installation diagram；

Fig. 4 is the enlarged diagram that A is marked in Fig. 3.

Reference：1st, tail spindle, 10, boss, 2, shell, 3, adjustment spacer, 30, interior contact surface, 31, external contacting surface, 32nd, outer peripheral face, 33, mounting hole, 4, first order step, 5, second level step, 6, interval body, 7, needle bearing, 8, disk spring.

Embodiment

Technological means, creation characteristic and the purpose reached to realize the utility model readily appreciate, with reference to Specific scheme of installation, the utility model is expanded on further, but the utility model scope claimed is not limited to have Scope described in body embodiment.

The structure type and assembly method of adjustment spacer of the prior art are as shown in figure 1, adjustment spacer bears axial force With the scarce capacity of radial load, the top bearing capacity using the adjustment spacer is only 10 tons.

A kind of top adjustment spacer of the present utility model, as shown in Figures 2 and 3, the center of the adjustment spacer 3, which is provided with, to be used In the mounting hole 33 on the end boss 10 of tail spindle 1, adjustment spacer 3 has the interior contact surface 30 that is oppositely arranged and external Contacting surface 31, interior contact surface 30 therein contact with the needle bearing 7 on tail spindle 1, and external contacting surface 31 is with being arranged on top Disk spring 8 on spivot 1 contacts.Interior contact surface 30 and the requirement of the roughness Ra of external contacting surface 31 are：Ra≤1.6μm；Adjustment The roughness Ra of the outer peripheral face 32 of spacer 3 radially requires：Ra≤1.6μm.

Wherein, as shown in Fig. 2 the inwall of mounting hole 33 is provided with the first order extended from the outside contact surface 31 of interior contact surface 30 Step 4, second level step 5 and interval body 6, second level step 5 share what an edge adjustment spacer 3 was radially arranged with interval body 6 Side, wherein, width of the first order step 4 along the axial direction of adjustment spacer 3 is less than width of the second level step 5 along the axial direction of adjustment spacer 3 Degree, height of the first order step 4 along the adjustment radial direction of spacer 3 are less than height of the second level step 5 along the adjustment radial direction of spacer 3.

As shown in Fig. 2 width L1 of the first order step 4 along adjustment spacer 3 axial direction, second level step 5 are along the adjustment axle of spacer 3 To width L3 along adjustment spacer 3 axial direction of width L2 and interval body 6 ratio be L1：L2：L3=1：3：2.

As shown in Fig. 2 first order step 4 along adjustment the radial direction of spacer 3 height H1 and second level step 5 along adjustment spacer 3 The height H2 of radial direction ratio is H1：H2=1：3.

As shown in Figure 3 and Figure 4, the internal diameter of first order step 4 is more than the internal diameter of the outer ring of needle bearing 7；Second level step 5 Internal diameter is more than the external diameter of tail spindle 1.As shown in Figure 3 and Figure 4, coordinate between second level step 5 and tail spindle 1 for small―gap suture, prevent Only lubricant grease leaks；Interval body 6 is set on boss 10.

According to the specific size of shell and tail spindle, the size of adjustment spacer can be adjusted according to aforementioned proportion.

In the specific implementation, it is preferred that width L1=2mm of the first order step 4 along the axial direction of adjustment spacer 3, second level step Width L2=6mm of the axial direction of 5 edge adjustment spacer 3, width L3=4mm of the interval body 6 along the axial direction of adjustment spacer 3.The edge of first order step 4 Adjust height H1=3mm of the radial direction of spacer 3, height H2=9mm of the second level step 5 along the adjustment radial direction of spacer 3, it is preferred that interval The internal diameter of body 6 is 31mm, and the internal diameter of first order step 4 is 55mm, and the internal diameter of second level step 5 is 49mm, outside adjustment spacer 3 Footpath is 62mm.

In the specific implementation, it is preferred that width L1=4.5mm of the first order step 4 along the axial direction of adjustment spacer 3, second level platform Width L2=13.5mm of the rank 5 along the axial direction of adjustment spacer 3, width L3=9mm of the interval body 6 along the axial direction of adjustment spacer 3.First order platform Height H1=6.75mm of the rank 4 along the adjustment radial direction of spacer 3, height H2=20.25mm of the second level step 5 along the adjustment radial direction of spacer 3, Preferably, the internal diameter of interval body 6 is 69.75mm, and the internal diameter of first order step 4 is 123.75mm, and the internal diameter of second level step 5 is 110.25mm, the external diameter of adjustment spacer 3 is 139.5mm.

Claims (6)

1. a kind of top adjustment spacer, the adjustment spacer（3）Center be provided be used for be arranged on tail spindle（1）End boss （10）On mounting hole（33）, adjust spacer（3）With the interior contact surface being oppositely arranged（30）With external contacting surface（31）, it is therein Interior contact surface（30）With installed in tail spindle（1）On needle bearing（7）Contact, external contacting surface（31）With installed in tail spindle （1）On disk spring（8）Contact, it is characterised in that：Mounting hole（33）Inwall be provided with from interior contact surface（30）To outer contacting Face（31）The first order step of extension（4）, second level step（5）And interval body（6）, second level step（5）With interval body（6）Altogether Spacer is adjusted with an edge（3）The side being radially arranged, wherein, first order step（4）Along adjustment spacer（3）The width of axial direction is small In second level step（5）Along adjustment spacer（3）The width of axial direction, first order step（4）Along adjustment spacer（3）The height of radial direction is small In second level step（5）Along adjustment spacer（3）The height of radial direction.

A kind of 2. top adjustment spacer according to claim 1, it is characterised in that：Interior contact surface（30）With external contacting surface （31）Roughness Ra requirement be：Ra≤1.6μm.

A kind of 3. top adjustment spacer according to claim 1, it is characterised in that：Adjust spacer（3）Radially Outer peripheral face（32）Roughness Ra requirement be：Ra≤1.6μm.

A kind of 4. top adjustment spacer according to claim 1, it is characterised in that：First order step（4）Along adjustment every Set（3）Width L1, the second level step of axial direction（5）Along adjustment spacer（3）The width L2 and interval body of axial direction（6）Along adjustment every Set（3）The width L3 of axial direction ratio is L1：L2：L3=1：3：2.

A kind of 5. top adjustment spacer according to claim 1, it is characterised in that：First order step（4）Along adjustment every Set（3）The height H1 and second level step of radial direction（5）Along adjustment spacer（3）The height H2 of radial direction ratio is H1：H2=1：3.

A kind of 6. top adjustment spacer according to claim 1, it is characterised in that：First order step（4）Internal diameter it is big In needle bearing（7）The internal diameter of outer ring；Second level step（5）Internal diameter be more than tail spindle（1）External diameter.