CN218801859U - Limiting clamp for press fitting of transmission shaft - Google Patents

Abstract

The utility model provides a limiting clamp for press fitting of a transmission shaft, which comprises an upper clamp and a lower clamp; the upper clamp comprises an upper clamp body with an avoidance groove; the top surface of the upper clamp body is provided with a limiting device which is matched with the first triangular flange to enable the first triangular flange to rotate between a first angle position and a second angle position; the first angle position and the second angle position are symmetrical about a front-rear midline of the avoidance groove, and the phase angle theta of the first angle position and the second angle position is not more than 50 degrees; the lower clamp comprises a lower clamp body; three first positioning holes are uniformly distributed in the circumferential direction at the top of the lower clamp body, and the axial center line of one first positioning hole is positioned in a vertical plane determined by the front and rear midline of the avoidance groove and the axial center line of the lower clamp body; the three first positioning holes are matched with the three through bolts on the second triangular flange in a positioning mode, so that the second triangular flange is symmetrical about the front-back center line of the avoidance groove; so that the maximum phase angle deviation of the two triangular flanges is limited within 25 DEG by the cooperation of the upper and lower clamps.

Description

Limiting clamp for press fitting of transmission shaft

Technical Field

The utility model belongs to transmission shaft assembly field, concretely relates to spacing anchor clamps are used in transmission shaft pressure equipment.

Background

An automobile transmission shaft is one of key parts of an automobile transmission system and is used for connecting a transmission and a differential so as to transmit power output by the transmission to the differential; at present, a transmission shaft is obtained by connecting a first transmission shaft assembly and a second transmission shaft assembly through a spline; as shown in fig. 1, the first transmission shaft assembly 01 includes a first transmission shaft 011, a first flexible coupling 013, a splined shaft 014, an intermediate support 015, and a high speed joint boot 016; one end of the first transmission shaft 011 is provided with a first triangular flange 012, and the first flexible coupling 013 is installed on the first triangular flange 012 through three circumferentially uniformly distributed penetrating bolts 017; the spline shaft 014 is coaxially welded at the other end of the first transmission shaft 011, and the middle support 015 and the high-speed joint sheath 016 are coaxially arranged on the spline shaft 014; as shown in fig. 2, the second transmission shaft assembly 02 includes a second transmission shaft 021, a ball cage universal joint 024, and a second flexible coupling 023, wherein one end of the second transmission shaft 021 has a second triangular flange 022, and the second flexible coupling 023 is mounted on the second triangular flange 022 by three circumferentially uniformly distributed through-bolts 017; a ball cage universal joint 024 is arranged at the other end of the second transmission shaft 021, and an inner star wheel of the ball cage universal joint 024 is provided with an inner spline matched with the spline shaft 014; when the transmission shaft is assembled, the first transmission shaft assembly 01 and the second transmission shaft assembly 02 need to be assembled respectively, then the spline shaft 014 of the first transmission shaft assembly 01 and the ball cage universal joint 024 of the second transmission shaft assembly 02 are aligned and pressed together, but when the two are aligned, a large ground phase angle deviation (the maximum phase angle deviation can reach 60 degrees) is easily caused between the two triangular flanges, so that when the subsequent transmission shaft is assembled and connected with the transmission and the differential, the transmission or the differential can be connected only after the transmission or the differential is rotated by a large angle manually (for example, after the first flexible coupling of the transmission shaft assembly is connected with the transmission, the differential can be connected with the second flexible coupling of the transmission shaft assembly only after the differential is rotated by a large angle because of the large ground phase angle deviation of the two triangular flanges), and the subsequent installation difficulty is increased.

SUMMERY OF THE UTILITY MODEL

In view of the shortcoming of above prior art, the utility model aims at providing a spacing anchor clamps are used in transmission shaft pressure equipment, it is through the biggest phase angle deviation of second triangle bead on first triangle bead on the first transmission shaft assembly of upper and lower two anchor clamps cooperation restriction and the second transmission shaft assembly to when first transmission shaft assembly aligns the installation with the second transmission shaft assembly, the phase angle deviation of two triangle beads can be restricted in less angular range, with the equipment degree of difficulty that reduces follow-up transmission shaft assembly and derailleur, differential mechanism.

In order to achieve the above and other related objects, the present invention provides a limiting clamp for press fitting of a transmission shaft, which is used for limiting a phase angle deviation between a first triangular flange on a first transmission shaft assembly and a second triangular flange on a second transmission shaft assembly; the limiting clamp comprises an upper clamp and a lower clamp which are fixed relatively; the upper clamp comprises an upper clamp body, and an avoidance groove communicated with the right end face of the upper clamp body is formed in the upper clamp body; the avoidance groove is used for allowing the first transmission shaft assembly to enter so that the first triangular flange is positioned above the upper clamp body; the top surface of the upper clamp body is provided with a limiting device; the limiting device is provided with two stopping surfaces, and the two stopping surfaces are matched with the two lug angles on the first triangular lug so that the first triangular lug can only rotate between a first angle position and a second angle position; the first angle position and the second angle position are symmetrical about a front-back dividing line of the avoidance slot, and a phase angle theta between the first angle position and the second angle position is not more than 50 degrees; the lower clamp comprises a lower clamp body; the axial center line of the lower clamp body is vertically intersected with the front and rear midline of the avoidance groove; three first positioning holes are uniformly distributed on the top surface of the lower clamp body in the circumferential direction, and the axial center line of one first positioning hole is positioned in a vertical plane defined by the front and rear midline of the avoidance groove and the axial center line of the lower clamp body; the three first positioning holes are in positioning fit with the three through bolts connected to the second triangular flange, so that the second triangular flange of the second transmission shaft assembly is symmetrical about the front-rear midline of the avoidance groove; the utility model firstly positions the angle position of the second triangular flange through the lower clamp, and then adjusts the angle position of the first triangular flange on the upper clamp; because the rotation angle of the first triangular flange on the upper clamp is not more than 50 degrees, the maximum phase angle deviation of the two triangular flanges is limited within 25 degrees, and the assembly difficulty of a subsequent transmission shaft assembly, a transmission and a differential is reduced.

Preferably, the limiting device comprises a limiting block; the two stop surfaces are positioned on the side wall of the limiting block.

Preferably, the limiting device comprises two limiting blocks which are symmetrically arranged relative to a front and rear midline of the avoidance groove; the two stop surfaces are respectively positioned on the two limit blocks.

Preferably, the avoidance groove is used for allowing the first transmission shaft 011 on the first transmission shaft assembly to enter, and the width of the avoidance groove is matched with the outer diameter of the first transmission shaft so as to limit the front and rear positions of the first transmission shaft in the avoidance groove; therefore, a user only needs to adjust the left and right positions of the first transmission shaft assembly on the upper clamp, and the first transmission shaft assembly can be conveniently coaxial with the second transmission shaft assembly on the lower clamp.

Preferably, the avoidance groove comprises a semi-circular groove and a rectangular groove which are communicated with each other; the semicircular groove is positioned on the left side of the rectangular groove, and the diameter of the semicircular groove is equal to the width of the rectangular groove; the circle center of the semicircular groove is located on the axial center line of the lower clamp body, so that a user can rapidly adjust the first transmission shaft assembly to a position coaxial with the second transmission shaft assembly.

Preferably, the spline tooth number n1 of the spline shaft on the first transmission shaft satisfies: n1 is more than or equal to 15 and less than or equal to 28, so that the phase angle deviation of the two triangular lugs is limited within the angle range of one key tooth, and the phase angle deviation of the two triangular lugs on the transmission shaft assembly after press fitting is further reduced.

Preferably, the rotation angle of the first triangular flange on the upper clamp body is 40 °, and the number of spline teeth of the spline shaft on the first transmission shaft is 26.

Preferably, the lower clamp is mounted on a lower mounting seat of the press-fitting device through a bolt; the bottom of the lower clamp body is coaxially provided with a lower positioning shaft; a first bolt hole is formed in the side wall of the lower positioning shaft, and the center line of the first bolt hole and the front and rear branch center lines of the avoidance groove are located in the same vertical plane; the top of the lower mounting seat is coaxially provided with a second positioning hole matched with the lower positioning shaft; a second bolt hole matched with the first bolt hole is formed in the side wall of the lower mounting seat, and the second bolt hole is communicated with a second positioning hole; the center line of the second bolt hole is located in a vertical plane determined by the center line of the second positioning hole and the front and rear center lines of the avoidance groove, and coaxiality of the lower clamp and the lower mounting seat is guaranteed.

Preferably, the second triangular flange is coaxially provided with an intermediate connecting shaft, the top of the lower clamp body is coaxially provided with an upper locating sleeve, and the locating sleeve is in locating fit with the intermediate connecting shaft on the second triangular flange, so that the coaxiality of the second transmission shaft assembly and the lower clamp is ensured.

As above, the utility model discloses a spacing anchor clamps are used in transmission shaft pressure equipment has following beneficial effect:

the device of the utility model positions the angle position of the second triangular flange through the lower clamp, and then adjusts the angle position of the first triangular flange on the upper clamp; because the rotation angle of the first triangular flange on the upper clamp is not more than 50 degrees, when the first transmission shaft assembly and the second transmission shaft assembly are pressed, the maximum phase angle deviation of the two triangular flanges is limited within a smaller angle range, and the assembly difficulty of the subsequent transmission shaft assembly, a transmission and a differential is reduced; the device of the utility model is simple in structure, convenient operation, convenient to popularize and use.

Drawings

FIG. 1 is a schematic view of a first driveshaft assembly.

FIG. 2 is a schematic view of a second driveshaft assembly.

Fig. 3 is a top view of the upper clamp of the first embodiment.

Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 3.

Fig. 5 is a plan view of the upper jig of the second embodiment.

Fig. 6 is a top view of the lower clamp.

Fig. 7 is a main sectional view of the lower jig.

FIG. 8 is a schematic view showing the angle of rotation of the first triangular flange on the first upper jig according to the embodiment.

FIG. 9 is a schematic view showing the angle of rotation of the first triangular flange on the second upper jig according to the embodiment.

Fig. 10 is a schematic view of the first and second transmission shaft assemblies being clamped by upper and lower clamps, respectively.

Description of the reference numerals

First transmission shaft assembly 01, first transmission shaft 011, first triangle lug 012, first flexible coupling 013, integral key shaft 014, middle support 015, high-speed festival sheath 016, to wearing bolt 017, second transmission shaft assembly 02, second transmission shaft 021, second triangle lug 022, second flexible coupling 023, ball cage universal joint 024, middle connecting shaft 025, go up anchor clamps 1, go up anchor clamps body 11, dodge groove 11a, stopper 12, backstop face 12a, lower anchor clamps 2, lower anchor clamps body 21, first locating hole 21a, lower locating shaft 22, first bolt hole 22a, go up position sleeve 23.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1 to 10. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

The limiting clamp for press mounting of the transmission shaft is applied to a press mounting device of the transmission shaft, so that when a first transmission shaft assembly 01 and a second transmission shaft assembly 02 of the transmission shaft are connected in a press mounting mode, phase angle deviation between two triangular flanges respectively positioned on the two transmission shaft assemblies can be limited within a smaller angle range, therefore, the quality distribution of the transmission shaft obtained by press mounting on the circumference is more uniform, two ends of the transmission shaft are more easily connected with corresponding opponent parts (such as a speed changer and a differential), and the difficulty in mounting the opponent parts is reduced; the application relates to a press-fitting device, which comprises a lower fixed seat and an upper press-fitting seat which are coaxially arranged, wherein the specific structure of the upper press-fitting seat refers to a patent with the patent number of CN202120509117.8, the patent name of the press-fitting device is a Hooke type transmission shaft middle connection spline pair press-fitting device, and the upper press-fitting seat comprises a connecting plate, a rotating table, a locking structure and a clamping press-fitting mechanism, wherein the connecting plate is installed on an upper driving unit and a lower driving unit, the rotating table is installed on the connecting plate in a horizontally rotating mode, the locking structure is used for locking the rotating table on the connecting plate, and the clamping press-fitting mechanism is arranged on the rotating table.

As shown in fig. 1 and 2, the transmission shaft to be press-fitted in the present application includes a first transmission shaft assembly 01 and a second transmission shaft assembly 02; the first transmission shaft assembly 01 comprises a first transmission shaft 011, a first flexible coupling 013, a spline shaft 014, an intermediate support 015 and a high-speed joint jacket 016; wherein, a first triangular flange 012 is coaxially fixed at the top end of the first transmission shaft 011; the first triangular protrusion 012 has three circumferentially distributed protrusion corners, and a protrusion groove is formed between two adjacent protrusion corners; the first flexible coupling 013 is connected with three flange angles on the first triangular flange 012 through three circumferentially uniformly distributed through bolts 017; a spline shaft 014 is coaxially welded at the bottom end of the first transmission shaft 011, and a middle support 015 and a high-speed joint sheath 016 are coaxially arranged on the spline shaft 014; the second transmission shaft assembly 02 comprises a second transmission shaft 021, a ball cage universal joint 024 and a second flexible coupling 023; wherein, the bottom end of the second transmission shaft 021 is coaxially fixed with a second triangular flange 022, the second triangular flange 022 has three flange angles distributed circumferentially, and a flange groove is formed between two adjacent flange angles; the second flexible coupling 023 is connected with three flange corners on a second triangular flange 022 through three circumferentially uniformly distributed penetrating bolts 017; the ball cage universal joint 024 is arranged at the top end of the second transmission shaft 021, and an inner star wheel of the ball cage universal joint 024 is provided with an inner spline matched with the spline shaft 014; when the transmission shaft is assembled, the first transmission shaft assembly 01 and the second transmission shaft assembly 02 are respectively assembled, then the spline shaft 014 of the first transmission shaft assembly 01 and the ball cage universal joint 024 of the second transmission shaft assembly 02 are aligned and pressed to form a middle spline pair, but when the external spline of the spline shaft is aligned with the internal spline of the ball cage universal joint 024, a large phase angle deviation (the maximum phase angle deviation can reach 60 degrees) is easily generated between triangular lugs on the two transmission shaft assemblies, so that the transmission shaft obtained by pressing has large mass distribution unevenness on the circumference, and when the transmission shaft is assembled and connected with a transmission and a differential, the transmission or the differential can be connected after being manually rotated by a large angle, and the subsequent connection difficulty is increased.

The first embodiment is as follows:

the limiting clamp for press mounting of the transmission shaft is used for limiting phase angle deviation between two triangular flanges on the transmission shaft; the limiting clamp comprises an upper clamp 1 and a lower clamp 2 which are fixed relatively; the lower clamp 2 is coaxially arranged on a lower press-mounting seat of the press-mounting device through a bolt; the upper clamp 1 is positioned below an upper press-mounting seat of the press-mounting device, and a gap for accommodating the first flexible coupling 013 and the first triangular flange 012 is formed between the upper clamp 1 and the upper press-mounting seat;

as shown in fig. 3, 4 and 8, the upper clamp 1 includes an upper clamp body 11 and a limiting device fixed on the top of the upper clamp body 11; an avoiding groove 11a communicated with the right end face of the upper clamp body 11 is formed in the upper clamp body 11, the avoiding groove 11a is used for allowing the first transmission shaft 011 to enter so that the first transmission shaft assembly 01 can be smoothly installed on a clamping press-fitting mechanism of the upper press-fitting seat, and at the moment, the first triangular flange 012 is positioned above the upper clamp body 11; the limiting device is a limiting block 12, and the limiting block 12 is matched with a flange groove on the first triangular flange 012 to realize the initial positioning of the angle position of the first triangular flange 012; the side wall of the limiting block 12 is provided with two stopping surfaces 12a, so that when the rotating table on the upper press-mounting seat drives the first transmission shaft assembly 01 on the clamping press-mounting mechanism to rotate, the two stopping surfaces 12a are matched with two side surfaces of the flange groove (i.e. the two stopping surfaces 12a are matched with flange corners on two sides of the flange groove), so that the first triangular flange 012 can only rotate between a first angle position and a second angle position; wherein the first and second angular positions are symmetrical about a front-rear dividing line of the avoidance groove 11a, and a phase angle θ between the first and second angular positions is not more than 50 °; the first angular position and the second angular position are respectively the angular positions of the two first triangular lugs 012 depicted by the broken lines in fig. 8;

as shown in fig. 6, the lower clamp 2 includes a lower clamp body 21, and an axial center line of the lower clamp body 21 perpendicularly intersects with a front-rear center line of the escape groove 11 a; three first positioning holes 21a are circumferentially and uniformly distributed on the top surface of the lower clamp body 21, and the axial center line of one first positioning hole 21a is positioned in a vertical plane determined by the front and rear dividing lines of the avoidance groove and the axial center line of the lower clamp body; the three first positioning holes 21a are positioned and fitted with three through-bolts 017 circumferentially uniformly distributed on the second triangular flange 022 to make the second triangular flange 022 of the second drive shaft assembly 02 symmetrical with respect to the front-rear midline of the avoidance groove 11a (even though the second triangular flange 022 is completely aligned with the first triangular flange 012 depicted by a solid line in fig. 8).

When in use, as shown in fig. 8 and 10, the upper clamp 1 is fixed on a rack of the press-fitting device, the upper clamp 1 is positioned between the upper pressing seat and the lower fixing seat, and the lower clamp 2 is coaxially arranged on the lower fixing seat of the press-fitting device, so that the central line of one first positioning hole 21a is ensured to be vertically intersected with the front-back midline of the avoidance groove on the upper clamp 1; then, the bolt heads of the three through bolts 017 on the second transmission shaft assembly 02 are aligned and matched with the three first positioning holes 21a on the lower clamp 2 to complete the positioning of the second transmission shaft assembly 02, so that the second triangular flange 022 on the second transmission shaft assembly 02 is symmetrical about the front-rear midline of the avoidance groove 11 a; next, the first transmission shaft 011 of the first transmission shaft assembly 01 is moved into the avoiding groove 11a, and the first transmission shaft assembly 01 is mounted on the clamping press-fitting mechanism of the upper press-fitting seat, so as to ensure that the first triangular flange 012 is positioned above the upper clamp body 11; the angle of the first transmission shaft assembly 01 is initially adjusted through the rotating disc, so that a flange groove of the first triangular flange 012 is positioned right above the limiting block 12; then the first transmission shaft assembly 01 moves downwards, and the lower end of the flange groove is sleeved on the limiting block 12; then, finely adjusting the angle of the first transmission shaft assembly 01 through the rotating disc until the spline shaft 014 of the first transmission shaft assembly 01 is aligned with the inner spline of the ball cage universal joint on the second transmission shaft assembly 02; locking the angle position of the rotating disc, and enabling the first transmission shaft assembly 01 to move downwards to be connected with the second transmission shaft assembly 02 in a press-fitting mode; because the angle adjusting range of the first transmission shaft assembly 01 is limited by the matching of the limiting block 12 and the first triangular flange 012, the phase angle deviation of the two triangular flanges on the transmission shaft obtained by press mounting can be limited within 25 degrees, the quality distribution of the transmission shaft obtained by press mounting on the circumference is more uniform, and the angle of the transmission shaft to a workpiece needs to be manually adjusted to be smaller when the transmission shaft is assembled and connected with a transmission and a differential, so that the assembling difficulty is reduced.

Further, as shown in fig. 3, the width of the avoiding groove 11a is adapted to the outer diameter of the first transmission shaft 011, so as to limit the front and rear positions of the first transmission shaft 011 in the avoiding groove 11a, and facilitate the alignment connection of the first transmission shaft assembly 01 and the upper press-fitting seat.

Further, as shown in fig. 3, the escape groove 11a includes a semicircular groove and a rectangular groove which are communicated with each other; the semicircular groove is positioned on the left side of the rectangular groove, and the diameter of the semicircular groove is equal to the width of the rectangular groove; the circle center of the semicircular groove is located on the axial center line of the lower clamp body 21, and the alignment difficulty of the first transmission shaft assembly 01 and the upper press mounting seat is reduced.

As shown in fig. 6 and 7, a lower positioning shaft 22 is coaxially arranged at the bottom of the lower clamp body 21; a first bolt hole 22a is formed in the side wall of the lower positioning shaft 22, and the central line of the first bolt hole 22a and the front and rear branch central lines of the avoidance groove are located in the same vertical plane; the top of the lower mounting seat is coaxially provided with a second positioning hole matched with the lower positioning shaft 22; the side wall of the lower mounting seat is provided with a second bolt hole matched with the first bolt hole 22a, and the second bolt hole is communicated with the second positioning hole; the central line of the second bolt hole is positioned in a vertical plane determined by the central line of the second positioning hole and the front and rear branch central lines of the avoidance groove; the coaxiality of the lower fixture 2 and the lower mounting seat is ensured through the matching of the second positioning hole and the lower positioning shaft 22; the cooperation of the first bolt hole 22a and the second bolt hole effectively ensures that the angular position of the lower clamp 2 is at the predetermined position.

As shown in fig. 2 and 7, the second triangular flange 022 is coaxially mounted with the intermediate connecting shaft 025, the top of the lower clamp body 21 is coaxially provided with the upper positioning sleeve 23, and the positioning sleeve 23 is in positioning fit with the intermediate connecting shaft 025 on the second triangular flange 022 to ensure the coaxiality of the lower clamp 2 and the second transmission shaft assembly 02, and further ensure the coaxiality of the first transmission shaft assembly 01 and the second transmission shaft 02 assembly.

Further, the number n1 of spline teeth of spline shaft 014 on first transmission shaft 011 satisfies: n1 is more than or equal to 15 and less than or equal to 28, so that the phase angle deviation of the two triangular flanges is limited within the angle range of one spline tooth; in the present embodiment, it is preferable that the phase angle θ between the first angular position and the second angular position is set to 40 °, and the number of spline teeth of the spline shaft 014 on the first transmission shaft 011 is set to 26.

The second embodiment:

the second embodiment of the limiting clamp for press mounting of the transmission shaft is used for limiting the phase angle deviation between two triangular flanges on the transmission shaft; the limiting clamp comprises an upper clamp 1 and a lower clamp 2 which are fixed relatively; the lower clamp 2 is coaxially arranged on a lower press-mounting seat of the press-mounting device through a bolt; the upper clamp 1 is positioned below an upper press-mounting seat of the press-mounting device, and a gap for accommodating the first flexible coupling 013 and the first triangular flange 012 is formed between the upper clamp 1 and the upper press-mounting seat;

as shown in fig. 5 and 9, the upper clamp 1 includes an upper clamp body 11 and a limiting device fixed on the top of the upper clamp body 11; an avoiding groove 11a communicated with the right end face of the upper clamp body 11 is formed in the upper clamp body 11, the avoiding groove 11a is used for allowing the first transmission shaft 011 to enter so that the first transmission shaft assembly 01 can be smoothly installed on a clamping press-fitting mechanism of the upper press-fitting seat, and at the moment, the first triangular flange 012 is positioned above the upper clamp body 11; the limiting device comprises two limiting blocks 12 which are symmetrically arranged about the front and rear midline of the avoidance groove; the two limit blocks 12 are matched with the two flange angles on the first triangular flange 012 to realize the initial positioning of the angular position of the first triangular flange 012; the side wall of each limit block 12 is provided with a stop surface 12a, so that when the rotating table on the upper press mounting seat drives the first transmission shaft assembly 01 on the clamping press mounting mechanism to rotate, the two stop surfaces 12a are matched with the side walls of the two flange angles, so that the first triangular flange 012 can only rotate between a first angle position and a second angle position; wherein the first and second angular positions are symmetrical about a front-rear dividing line of the avoidance groove 11a, and a phase angle θ between the first and second angular positions is not more than 50 °;

as shown in fig. 6, the lower clamp 2 includes a lower clamp body 21, and an axial center line of the lower clamp body 21 perpendicularly intersects with a front-rear center line of the escape groove 11 a; three first positioning holes 21a are uniformly distributed on the top surface of the lower clamp body 21 in the circumferential direction, and the axial center line of one first positioning hole 21a is positioned in a vertical plane determined by the front and rear midline of the avoidance groove and the axial center line of the lower clamp body; the three first positioning holes 21a are in positioning fit with three through bolts 017 circumferentially and uniformly distributed on the second triangular flange 022 so that the second triangular flange 022 of the second transmission shaft assembly 02 is symmetrical with respect to the front-rear midline of the avoidance groove 11 a.

When in use, as shown in fig. 9 and 10, the upper clamp 1 is fixed on a rack of the press-fitting device, the upper clamp 1 is positioned between the upper pressing seat and the lower fixing seat, and the lower clamp 2 is coaxially arranged on the lower fixing seat of the press-fitting device, so that the central line of one first positioning hole 21a is ensured to be vertically intersected with the front-back midline of the avoidance groove on the upper clamp 1; then, the bolt heads of the three through bolts 017 on the second transmission shaft assembly 02 are aligned and matched with the three first positioning holes 21a on the lower clamp 2 to complete the positioning of the second transmission shaft assembly 02, so that the second triangular flange 022 on the second transmission shaft assembly 02 is symmetrical about the front-rear midline of the avoidance groove 11 a; next, the first transmission shaft 011 of the first transmission shaft assembly 01 is moved into the avoiding groove 11a, and the first transmission shaft assembly 01 is mounted on the clamping press-fitting mechanism of the upper press-fitting seat, so as to ensure that the first triangular flange 012 is positioned above the upper clamp body 11; the angle of the first transmission shaft assembly 01 is initially adjusted through the rotating disc, so that the two flange grooves of the first triangular flange 012 are respectively positioned right above the two limit blocks 12; then the first transmission shaft assembly 01 moves downwards, and the lower end of the flange groove is sleeved on the corresponding limit block 12; then, finely adjusting the angle of the first transmission shaft assembly 01 through the rotating disc until the spline shaft 014 of the first transmission shaft assembly 01 is aligned with the inner spline of the ball cage universal joint on the second transmission shaft assembly 02; locking the angle position of the rotating disc, and enabling the first transmission shaft assembly 01 to move downwards to be connected with the second transmission shaft assembly 02 in a press-fitting mode; because the limiting block 12 and the first triangular flange 012 are matched to limit the angle adjusting range of the first transmission shaft assembly 01, the phase angle deviation of the two triangular flanges on the transmission shaft obtained by press mounting can be limited within 25 degrees, the quality distribution of the transmission shaft obtained by press mounting on the circumference is more uniform, and the angle of a workpiece needs to be manually adjusted to be smaller when the transmission shaft is assembled and connected with a transmission and a differential mechanism, so that the assembling difficulty is reduced.

Further, as shown in fig. 5, the width of the avoiding groove 11a is adapted to the outer diameter of the first transmission shaft 011, so as to limit the front and rear positions of the first transmission shaft 011 in the avoiding groove 11a, and facilitate the alignment connection of the first transmission shaft assembly 01 and the upper press-fitting seat.

Further, as shown in fig. 5, the escape groove 11a includes a semicircular groove and a rectangular groove which are communicated with each other; the semicircular groove is positioned on the left side of the rectangular groove, and the diameter of the semicircular groove is equal to the width of the rectangular groove; the circle center of the semicircular groove is located on the axial center line of the lower clamp body 21, and the alignment difficulty of the first transmission shaft assembly 01 and the upper press mounting seat is reduced.

As shown in fig. 7, a lower positioning shaft 22 is coaxially arranged at the bottom of the lower clamp body 21; a first bolt hole 22a is formed in the side wall of the lower positioning shaft 22, and the central line of the first bolt hole 22a and the front and rear branch central lines of the avoidance groove are located in the same vertical plane; the top of the lower mounting seat is coaxially provided with a second positioning hole matched with the lower positioning shaft 22; the side wall of the lower mounting seat is provided with a second bolt hole matched with the first bolt hole 22a, and the second bolt hole is communicated with the second positioning hole; the central line of the second bolt hole is positioned in a vertical plane determined by the central line of the second positioning hole and the front and rear branch central lines of the avoidance groove; the coaxiality of the lower fixture 2 and the lower mounting seat is ensured through the matching of the second positioning hole and the lower positioning shaft 22; the cooperation of the first bolt hole 22a and the second bolt hole effectively ensures that the angular position of the lower clamp 2 is at the predetermined position.

As shown in fig. 2, 7 and 10, the second triangular flange 022 is coaxially mounted with the intermediate connecting shaft 025, the top of the lower clamp body 21 is coaxially provided with the upper positioning sleeve 23, and the positioning sleeve 23 is in positioning fit with the intermediate connecting shaft 025 on the second triangular flange 022 to ensure the coaxiality of the lower clamp 2 and the second transmission shaft assembly 02, and further ensure the coaxiality of the first transmission shaft assembly 01 and the second transmission shaft assembly 02.

Further, the number n1 of spline teeth of spline shaft 014 on first transmission shaft 011 satisfies: n1 is more than or equal to 15 and less than or equal to 28, so that the phase angle deviation of the two triangular flanges is limited within the angle range of one spline tooth; in the present embodiment, it is preferable to set the phase angle θ between the first angular position and the second angular position to 40 °, and to set the number of spline teeth of spline shaft 014 on first drive shaft 011 to 26, so as to limit the phase angle deviation of the two triangular lugs to 13.85 °.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (9)

1. A limiting clamp for press mounting of a transmission shaft is used for limiting phase angle deviation between a first triangular flange (012) on a first transmission shaft assembly (01) and a second triangular flange (022) on a second transmission shaft assembly (02); the device is characterized in that the limiting clamp comprises an upper clamp (1) and a lower clamp (2) which are relatively fixed; the upper clamp (1) comprises an upper clamp body (11), and an avoidance groove (11 a) communicated with the right end face of the upper clamp body (11) is formed in the upper clamp body (11); the avoidance groove (11 a) is used for allowing the first transmission shaft assembly (01) to enter, so that the first triangular flange (012) is positioned above the upper clamp body (11); the top surface of the upper clamp body (11) is provided with a limiting device; the limiting device is provided with two stopping surfaces (12 a), and the two stopping surfaces (12 a) are in angle fit with two lug angles on the first triangular lug (012) so that the first triangular lug (012) can only rotate between a first angle position and a second angle position; the first and second angular positions are symmetrical about a front-rear dividing line of the avoidance groove (11 a), and a phase angle theta between the first and second angular positions is not more than 50 degrees; the lower clamp (2) comprises a lower clamp body (21); the axial center line of the lower clamp body (21) is vertically intersected with the front and rear center lines of the avoidance groove (11 a); three first positioning holes (21 a) are uniformly distributed on the top surface of the lower clamp body (21) in the circumferential direction, and the axial center line of one first positioning hole (21 a) is positioned in a vertical plane defined by the front and rear midline of the avoidance groove and the axial center line of the lower clamp body; the three first positioning holes (21 a) are in positioning fit with three penetrating bolts (017) connected to the second triangular flange (022), so that the second triangular flange (022) of the second transmission shaft assembly (02) is symmetrical about the front-rear midline of the avoidance groove.

2. The limit clamp for press fitting of the transmission shaft according to claim 1, wherein the limit device comprises a limit block; the two stop surfaces are positioned on the side wall of the limiting block.

3. The limiting clamp for press fitting of the transmission shaft according to claim 1, wherein the limiting device comprises two limiting blocks symmetrically arranged about a front-rear midline of the avoidance groove; the two stop surfaces are respectively positioned on the two limit blocks.

4. The limiting clamp for press fitting of the transmission shaft according to any one of claims 1 to 3, wherein the avoiding groove (11 a) is used for allowing the first transmission shaft (011) on the first transmission shaft assembly (01) to enter, and the width of the avoiding groove (11 a) is matched with the outer diameter of the first transmission shaft (011) so as to limit the front and rear positions of the first transmission shaft (011) in the avoiding groove (11 a).

5. The limit clamp for press fitting of the transmission shaft according to claim 4, wherein the avoiding groove (11 a) comprises a semicircular groove and a rectangular groove which are communicated with each other; the semicircular groove is positioned on the left side of the rectangular groove, and the diameter of the semicircular groove is equal to the width of the rectangular groove; the circle center of the semicircular groove is positioned on the axial central line of the lower clamp body (21).

6. The limit clamp for press fitting of the transmission shaft according to claim 4, wherein the number n1 of spline teeth of the spline shaft (014) on the first transmission shaft (011) satisfies: n1 is more than or equal to 15 and less than or equal to 28.

7. The limit jig for press-fitting of a transmission shaft according to claim 6, wherein a phase angle θ =40 ° between the first angular position and the second angular position, and the number of spline teeth of the spline shaft (014) on the first transmission shaft (011) is 26.

8. The limiting clamp for press fitting of the transmission shaft as claimed in claim 1, wherein the lower clamp (2) is mounted on a lower mounting seat of the press fitting device through a bolt; a lower positioning shaft (22) is coaxially arranged at the bottom of the lower clamp body (21); a first bolt hole (22 a) is formed in the side wall of the lower positioning shaft (22), and the central line of the first bolt hole (22 a) and the front and rear dividing central lines of the avoidance groove are located in the same vertical plane; the top of the lower mounting seat is coaxially provided with a second positioning hole matched with the lower positioning shaft (22); a second bolt hole matched with the first bolt hole (22 a) is formed in the side wall of the lower mounting seat, and the second bolt hole is communicated with a second positioning hole; the center line of the second bolt hole is located in a vertical plane determined by the center line of the second positioning hole and the front and rear center lines of the avoidance groove.

9. The limiting clamp for press fitting of the transmission shaft as claimed in claim 1, wherein the second triangular flange (022) is coaxially provided with the middle connecting shaft (025), the top of the lower clamp body (21) is coaxially provided with the upper locating sleeve (23), and the locating sleeve (23) is in locating fit with the middle connecting shaft (025) on the second triangular flange (022).

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