CN214582995U

CN214582995U - Raceway shape and contact point detection device

Info

Publication number: CN214582995U
Application number: CN202121152616.2U
Authority: CN
Inventors: 孙尧超; 王彦明; 王云生; 邹云晓
Original assignee: Yantai Haoyang Machinery Co ltd
Current assignee: Yantai Haoyang Machinery Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-11-02
Anticipated expiration: 2031-05-27

Abstract

The utility model relates to a raceway shape and contact point detection device, which comprises a fixed sample plate and a sliding sample plate, the fixed sample plate and the sliding sample plate are connected through an elastic component, arc sections matched with the upper and lower arcs of the raceway to be detected are arranged on the fixed sample plate and the sliding sample plate, the sliding sample plate is provided with a rack, the fixed sample plate is also provided with a fixed gear train I, a fixed gear train II, a pointer I and a pointer II, the ordinary gear train I and the ordinary gear train II are meshed with the rack, the pointer I and the pointer II are coaxially overlapped and arranged on the front surface of the fixed sample plate, the pointer I is linked with the ordinary wheel train I, and the pointer II is linked with the ordinary wheel train II, the utility model is used for synchronously detecting the shape of the roller path and the offset of the circular arc circle center of the roller path, and the theoretical contact point of the steel ball and the raceway is reflected through the pointing positions of the pointer I and the pointer II.

Description

Raceway shape and contact point detection device

Technical Field

The utility model relates to a raceway shape and contact point detection device belongs to bearing raceway and detects technical field.

Background

The slewing bearing is a large bearing capable of bearing comprehensive load, and is an important transmission part necessary for machinery which needs to do relative slewing motion between two objects and simultaneously bear axial force, radial force and tilting moment. The slewing bearing generally comprises an outer ring, an inner ring, a steel ball and a sealing belt, wherein the steel ball moves in a raceway of the outer ring and the inner ring, the raceway is an important component of a slewing bearing structure, the change of a contact point of the raceway and the steel ball is caused by the up-and-down deviation of the circular arc centers of the upper raceway and the lower raceway, the contact points reflected by the different circle center deviations are different, the raceway is machined by a method that a machine tool drives a cutter to cut, and the actual shape of the actually machined raceway is inconsistent with the theoretical shape due to the inevitable size errors of the machine tool rigidity, the clearance and the cutter, namely the up-and-down deviation of the circular arc centers of the upper raceway and the lower raceway is changed, but the actual shape is within a tolerance range allowed by design.

The traditional raceway shape detection mode only uses a standard raceway sample plate for detection, the sample plate is fixed in shape and cannot move up and down, the accuracy of an actual contact point cannot be directly reflected, and the detection efficiency and the detection result are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a raceway shape and contact point detection device aiming at the defects of the prior art, which comprises a fixed sample plate and a sliding sample plate, wherein the fixed sample plate and the sliding sample plate are connected through an elastic component, and arc sections are arranged on the fixed sample plate and the sliding sample plate;

the elastic assembly comprises a sliding needle, a sliding sleeve and a compression spring, the sliding needle is fixed on the sliding sample plate, the sliding sleeve is fixed on the fixed sample plate, the sliding needle is slidably arranged in the sliding sleeve, the compression spring is positioned between the sliding sleeve and the sliding sample plate and sleeved on the sliding needle, and a limiting block used for limiting the position of the sliding sample plate is arranged on the fixed sample plate.

The utility model discloses a gear train structure, including slip model I, ordinary gear train I, pointer II, fixed gear train I, pointer II, fixed gear train I, fixed gear train II, fixed gear train I, pointer II, fixed gear train I's terminal output gear direction of rotation with fixed gear train II's terminal output gear direction of rotation is opposite.

The fixed-axis gear train I and the fixed-axis gear train II are in gear transmission with a proper transmission ratio, so that the rack moves and outputs the same angular displacement to the pointer I and the pointer II, the change of an included angle between the pointer I and the pointer II from the displacement of the sliding template can be realized through the device, the actually processed circular arc center offset of the raceway can be detected according to the actual included angle change angle between the pointer I and the pointer II, the theoretical contact point between a steel ball and the raceway is reflected by the pointing directions of the pointer I and the pointer II, and the synchronous detection of the shape of the raceway and the circular arc center offset of the raceway is realized.

Furthermore, the fixed sample plate and the sliding sample plate are provided with positioning bolts and oblong holes, and when the measurement is finished, the measurement result is stored.

The utility model has the advantages that:

1. the shapes of the raceways are measured by comparing the two templates, the sliding displacement of the sliding template under the action of a compression spring is converted into the change of the included angle between the pointer I and the pointer II, and the actually processed circular arc center offset of the raceways can be detected according to the actually changed angle of the included angle between the pointer I and the pointer II;

2. the pointer I and the pointer II point to contact points reflecting theories of the steel ball and the raceway, synchronous detection of the shape of the raceway and the offset of the circular arc center of the raceway is achieved, and the detection result is direct, high in efficiency and high in accuracy.

Drawings

Fig. 1 is a schematic front structural view of the present invention;

FIG. 2 is a schematic view of the reverse structure of the present invention;

FIG. 3 is a schematic structural view of the pointer and ordinary gear train of the present invention;

fig. 4 is a schematic view of the back structure of the fixed sample plate of the present invention;

fig. 5 is a schematic view of the back structure of the sliding sample plate of the present invention;

FIG. 6 is a schematic diagram of a standard raceway configuration;

FIG. 7 is a schematic view of a contact point change structure after the offset of the circular arc center of the upper and lower raceways is increased;

FIG. 8 is a schematic view of a contact point variation structure after the offset of the circular arc centers of the upper and lower raceways is reduced;

FIG. 9 is a schematic diagram of a standard raceway pointer position;

FIG. 10 is a schematic diagram showing the change of the included angle of the pointer after the offset of the circular arc center of the upper and lower raceways is increased;

fig. 11 is a schematic diagram of the change of the included angle of the pointer after the offset of the circle centers of the circular arcs of the upper and lower raceways is reduced.

In the figure, 1 fixed sample plate, 1.1 circular arc I, 2 sliding sample plates, 2.1 circular arc II, 3.1 sliding needle, 3.2 sliding sleeve, 3.3 compression spring, 4 limiting blocks, 5 racks, 6 fixed-axis gear train I, 7 fixed-axis gear train II, 8 pointer I, 9 pointer II, 10 positioning bolt, 11 slotted hole, 12 raceway bearing, 13 upper raceway, 14 lower raceway, 15 steel ball, A upper contact point, A 'lower contact point, R upper raceway circular arc radius and R' lower raceway circular arc radius.

Detailed Description

The principles and features of the present invention are described below in conjunction with examples, which are set forth only to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in the figure, the raceway shape and contact point detection device comprises a fixed sample plate 1 and a sliding sample plate 2, wherein the fixed sample plate 1 and the sliding sample plate 2 are connected through an elastic component, an arc I1.1 is arranged on the fixed sample plate 1, an arc II 2.1 is arranged on the sliding sample plate 2, and the radii of the arc I1.1 and the arc II 2.1 are the same;

elastic component includes sliding needle 3.1, sliding sleeve 3.2 and compression spring 3.3, sliding needle 3.1 is fixed the 2 backs of slip model, sliding sleeve 3.2 is fixed the 1 backs of fixed model, sliding sleeve 3.2 is hollow cylindrical structure, sliding needle 3.1 slides in sliding sleeve 3.2, compression spring 3.3 is located between sliding sleeve 3.2 and the slip model 2 and overlaps on sliding needle 3.1, stopper 4 is fixed on fixed model 1, stopper 4 makes sliding needle 3.1 slide in compression spring 3.3's elasticity within range, stopper 4 is used for injecing the position of slip model, sliding sleeve 3.2 cooperates with sliding needle 3.1, it is spacing to compression spring 3.3.

The sliding sample plate 2 slides under the action of a compression spring 3.3, a circle center connecting line of the arc I1.1 and the arc II 2.1 is always parallel to the telescopic direction of the compression spring 3.3, a rack 5 is installed on the sliding sample plate 2, and the transmission direction of the rack 5 is parallel to the telescopic direction of the compression spring 3.3.

The fixed sample plate 1 is further provided with an ordinary gear train I6, an ordinary gear train II 7, a pointer I8 and a pointer II 9, the ordinary gear train I6 and the ordinary gear train II 7 are meshed with the rack 5, the pointer I8 and the pointer II 9 are coaxially overlapped and arranged on the front face of the fixed sample plate 1, the pointer I8 is linked with the ordinary gear train I6, the pointer II 9 is linked with the ordinary gear train II 7, and the pointer I8 and the pointer II 9 point to the arc edges of the fixed sample plate 1 and the sliding sample plate 2 respectively and are used for indicating contact points of steel balls on raceways.

Ordinary gear train I6 includes two intermeshing's gear, ordinary gear train II 7 includes three intermeshing's gear, the terminal output gear of ordinary gear train I6 and ordinary gear train II 7 stacks, the terminal output gear direction of rotation of ordinary gear train I6 and ordinary gear train II 7 is opposite, ordinary gear train I6 with ordinary gear train II 7 uses the gear drive of suitable drive ratio, makes rack 5 move the angular displacement volume of exporting pointer I8 and pointer II 9 the same.

The offset of the circle centers of the arcs of the upper and

lower raceways

13 and 14 varies with the upper contact point a and the upper contact point a':

as shown in fig. 6 to 8, the arc radius of the upper raceway of the raceway bearing 12 is the same as the arc radius R and R' of the lower raceway, the arc center of the upper raceway is located at the lower position, the arc center of the lower raceway is located at the upper position, and the arc radius of the upper raceway and the arc radius of the lower raceway are larger than the radius phi/2 of the steel ball 15.

For example, the offset of the circular arc centers of the upper and

lower raceways

13 and 14 of the standard raceway bearing 12 is 1.2mm (as shown in fig. 6), the upper contact point a is the contact point of the steel ball 12 with the upper raceway 13, the lower contact point a 'is the contact point of the steel ball 12 with the lower raceway 14, the central angles of the upper contact point a and the lower contact point a' are 90 °, when the offset of the circular arc centers of the upper and lower raceways is increased to 1.25mm (as shown in fig. 7), the central angles of the upper contact point a and the lower contact point a 'are increased to 95 °, and when the offset of the circular arc centers of the upper and

lower raceways

13 and 14 is decreased to 1.15mm (as shown in fig. 8), the central angles of the upper contact point a and the lower contact point a' are decreased to 85 °.

The utility model discloses a detection device examines the theory of operation of time measuring:

as shown in fig. 9 to 11, firstly, an initial included angle between the pointer i 8 and the pointer ii 9 is set to be a central angle between contact points of standard raceways, the sliding template 2 slides under the action of the compression spring 3.3 according to the actually processed shape of the raceway, the sliding template 2 slides to drive the pointer i 8 and the pointer ii 9 to swing,

if the sliding sample plate 2 moves towards the fixed sample plate, namely the offset of the circle centers of the circular arcs of the upper and lower raceways is increased, the included angle between the pointer I8 and the pointer II 9 is increased relative to the initial included angle, and the contact point is indicated to move outwards;

the sliding sample plate 2 moves away from the fixed sample plate 1, namely the offset of the circle centers of the circular arcs of the upper and lower raceways becomes small, and the included angle between the pointer I8 and the pointer II 9 becomes small relative to the initial included angle, which indicates that the contact point moves inwards.

And the fixed sample plate 1 and the sliding sample plate 2 are provided with positioning bolts 10 and oblong holes 11, when the measurement is finished, the positioning bolts 10 are screwed down to fix the sliding sample plate 2, and the measurement result is stored.

The device can realize the change of the included angle between the pointer I8 and the pointer II 9 output from the displacement of the sliding sample plate 2, the actually processed circular arc center offset of the raceway can be detected according to the actual change angle of the included angle between the pointer I8 and the pointer II 9, and the theoretical contact point of the steel ball and the raceway is reflected by the pointing directions of the pointer I8 and the pointer II 9.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection device for the shape of a roller path and a contact point is characterized by comprising a fixed sample plate and a sliding sample plate, wherein the fixed sample plate and the sliding sample plate are connected through an elastic component, and arc sections are arranged on the fixed sample plate and the sliding sample plate;

the elastic assembly comprises a sliding needle, a sliding sleeve and a compression spring, the sliding needle is fixed on the sliding sample plate, the sliding sleeve is fixed on the fixed sample plate, the sliding needle is slidably arranged in the sliding sleeve, the compression spring is positioned between the sliding sleeve and the sliding sample plate and sleeved on the sliding needle, and the fixed sample plate is provided with a limiting block for limiting the position of the sliding sample plate;

the utility model discloses a gear train structure, including slip model, fixed model, installation rack on the slip model, rack transmission direction with compression spring's flexible direction is parallel, still be equipped with ordinary gear train I, ordinary gear train II, pointer I and pointer II on the fixed model, ordinary gear train I and ordinary gear train II all with rack toothing, the coaxial stack of pointer I and pointer II sets up in the front of fixed model, pointer I links with ordinary gear train I, pointer II links with ordinary gear train II, the terminal output gear direction of rotation of ordinary gear train I and ordinary gear train II is opposite.

2. The race shape and contact point detecting device according to claim 1, wherein the fixing jig and the sliding jig are provided with positioning bolts and oblong holes.