CN215148774U

CN215148774U - Auxiliary tool for installing return spring of gearbox

Info

Publication number: CN215148774U
Application number: CN202120583115.3U
Authority: CN
Inventors: 徐升; 吴鹏; 童小红; 任早早; 汪勤峰; 胡东旭
Original assignee: Hangzhou Advance Gearbox Group Co Ltd
Current assignee: Hangzhou Advance Gearbox Group Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-12-14
Anticipated expiration: 2031-03-22

Abstract

The utility model discloses an auxiliary fixtures that is used for return spring installation of gear box, including drive nut, stroke screw rod, fixed swivel nut, push-in cover and spring tray, fixed swivel nut is installed on the transmission shaft that return spring overlaps and establishes through screw-thread fit, fixed swivel nut, push-in cover and the coaxial distribution of spring tray, fixed swivel nut is located the inboard of push-in cover and spring tray and respectively with push-in cover and spring tray clearance fit, stroke screw rod and fixed swivel nut fixed mounting or integrated into one piece, drive nut is through screw-thread fit reciprocating motion on the stroke screw rod, and when drive nut moves forward, drive nut can promote the push-in cover to move forward, and then promotes the spring tray and will return the spring and press to the assigned position; by adopting the technical scheme, a single person can complete compression of the return spring, and the compression is efficient and quick; and the whole assembly process is controllable, and secondary damage to parts can not be caused.

Description

Auxiliary tool for installing return spring of gearbox

Technical Field

The utility model relates to a gear box technical field especially relates to an auxiliary fixtures that is used for gear box return spring to install.

Background

In order to control the specific rotational speed of the central output shaft of the gearbox individually, a clutch (brake) is also typically provided in the gearbox; comprises an inner friction plate, an outer friction plate, a bearing plate, an annular piston, a return spring seat and a return spring screw which are positioned in a box body, wherein the bearing plate, the outer friction plate and a first shell are in circumferential positioning axial movable fit, the inner friction plate and a first semi-axis are in circumferential positioning axial movable fit, a plurality of annular inner friction plates and a plurality of annular outer friction plates are alternately overlapped, the annular piston moves between a braking position and a non-braking position, the return spring enables the annular piston to move from the braking position to the non-braking position, a plurality of second mounting holes are uniformly distributed in the side face of the annular piston, the return spring seat is mounted in the second mounting holes in an interference fit mode, the return spring screw penetrates through the return spring seat and is mounted on the first shell, the return spring is sleeved on the return spring screw, one end of the return spring abuts against the return spring seat, and the other end of the return spring abuts against the return spring screw.

The spring is large in diameter, tools are usually needed to be used for installation, and currently, a press machine is mainly used for pressing the spring and then the spring is clamped into a positioning check ring; in the assembly process, the fixed part needs to be hoisted by a crane and fixed on a press bed, so that manpower and material resources are consumed, the efficiency is not high, the part is easy to be damaged, and unnecessary loss is caused;

in addition, such assembly methods are also very cumbersome when replacing the return spring; because direct replacement on the gearbox is not possible, the entire set of clutch piston components typically needs to be removed and assembled on a conditioned site. When the gearbox with a compact structure is encountered, the components are not easy to disassemble, and the box disassembling treatment is required. The maintenance is time-consuming and labor-consuming, and the maintenance difficulty is large.

Disclosure of Invention

In order to solve the above problems, the present invention aims to overcome the deficiencies of the prior art and provide an auxiliary tool for mounting a return spring of a gearbox; the compression of the return spring can be finished by a single person through the tool, so that the tool is efficient and quick; and the whole assembly process is controllable, and secondary damage to parts can not be caused.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an auxiliary fixtures for installation of gear box return spring, includes drive nut, stroke screw rod, fixed swivel nut, the cover of impressing and spring tray, fixed swivel nut is installed on the transmission shaft that return spring overlaps and establish through screw-thread fit, fixed swivel nut, the cover of impressing and the coaxial distribution of spring tray, fixed swivel nut is located the inboard of cover of impressing and spring tray and respectively with cover of impressing and spring tray clearance fit, stroke screw rod and fixed swivel nut fixed mounting or integrated into one piece, drive nut passes through screw-thread fit reciprocating motion on the stroke screw rod to when drive nut removes forward, drive nut can promote the cover of impressing and remove forward, and then promotes the spring tray and will return resilience spring pressure to assigned position.

Preferably, the transmission shaft at least comprises a first shaft body, a second shaft body, a third shaft body and a fourth shaft body, the diameters of the first shaft body, the second shaft body, the third shaft body and the fourth shaft body are continuously increased along the direction from the front to the back, the fixed threaded sleeve is installed on the fourth shaft body in a threaded fit mode, the return spring is installed on the second shaft body in a sleeved mode, a first annular groove is formed in the second shaft body, and the first annular groove is close to the third shaft body. After the return resilience spring is pressed to the front of the first annular groove by the spring tray, the elastic retainer ring for the shaft is arranged in the first annular groove; thereby completing the installation of the return spring.

Preferably, the return springs are each located forward of the first annular groove when the spring tray presses the return spring to a specified position.

Preferably, the press-in sleeve is provided with a central through hole through which the stroke screw rod can pass, and the diameter of the central through hole is smaller than the outer diameter of the driving nut.

Preferably, the press-in sleeve and the driving nut are fixedly connected or integrally formed.

Preferably, the spring tray comprises a cylinder body, the cylinder body is positioned at the front end of the spring tray, and the inner diameter of the cylinder body is larger than that of the second shaft body.

Preferably, the front end face of the barrel extends forwards to form a circle of arc-shaped bulge, the thickness of the arc-shaped bulge is smaller than that of the barrel, and the arc-shaped bulge is close to the outer edge of the front end face of the barrel.

Preferably, the side wall of the cylinder body is provided with at least one notch, and the distance between the two side walls of the notch is not less than 5 cm.

Preferably, the inner side wall of the barrel is further provided with a circle of arc-shaped groove, and the arc-shaped groove is close to the front end face of the barrel.

The utility model has the advantages that: the compression of the return spring can be finished by a single person through the tool, so that the tool is efficient and quick; and the whole assembly process is controllable, and secondary damage to parts can not be caused.

Drawings

FIG. 1 is a schematic view of the quick return spring assembly of the present invention;

FIG. 2 is a first schematic diagram illustrating the explosion of FIG. 1 according to the present invention;

FIG. 3 is a second exploded view of FIG. 1 in accordance with the present invention;

fig. 4 is a schematic structural diagram of the spring tray of the present invention.

Description of reference numerals: 1. a drive nut; 2. a travel screw; 3. fixing the threaded sleeve; 4. pressing in the sleeve; 5. a spring tray; 6. a return spring; 7. a drive shaft; 70. a first shaft body; 71. a second shaft body; 72. a third shaft body; 73. a fourth shaft body; 74. a first annular groove; 50. a barrel; 501. an arc-shaped bulge; 502. a notch; 503. an arc-shaped groove; 8. circlip for shaft.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the present invention, the return spring is located "forward" of the drive nut.

The first embodiment is as follows:

an auxiliary tool for mounting a return spring of a gearbox as shown in figures 1-3 comprises a driving nut 1, a stroke screw rod 2, a fixed threaded sleeve 3, a pressing sleeve 4 and a spring tray 5, the fixed threaded sleeve 3 is arranged on a transmission shaft 7 sleeved with a return spring 6 in a threaded fit manner, the fixed threaded sleeve 3, the press-in sleeve 4 and the spring tray 5 are coaxially distributed, the fixed threaded sleeve 3 is positioned at the inner sides of the press-in sleeve 4 and the spring tray 5 and is respectively in clearance fit with the press-in sleeve 4 and the spring tray 5, the stroke screw rod 2 and the fixed screw sleeve 3 are fixedly arranged or integrally formed, the driving nut 1 is matched with the stroke screw rod 2 through threads to move in a reciprocating manner, and when the driving nut 1 moves forward, the driving nut 1 can push the press-in sleeve 4 to move forward, and further push the spring tray 5 to press the return spring 6 to a designated position.

In the embodiment, the tool is mainly used for pressing the return spring 6 to a specified position, so that the press machine adopted in the prior art is replaced for pressing the return spring 6 to the specified position; and then make this frock have following advantage:

firstly, the whole tool has few and small parts, so that the whole tool is convenient to carry, the return spring 6 in the gear box can be installed on site, and the problem that the return spring 6 in the gear box is difficult to replace is solved;

secondly, when the return spring 6 is installed through the tool, the installation can be completed by one person, and the installation is efficient and rapid;

thirdly, when the return spring 6 is installed through the tool, the assembling process is controllable, and secondary damage to parts cannot be caused.

It should be noted that the transmission shaft 7 for housing the return spring at least includes a first shaft 70, a second shaft 71, a third shaft 72 and a fourth shaft 73 with increasing diameters along the direction from front to back, the fixed screw sleeve 3 is installed on the fourth shaft 73 through screw-fit, the return spring 6 is mounted on the second shaft 71 in a housing manner, the second shaft 71 is provided with a first annular groove 74, and the first annular groove 74 is close to the third shaft 72; after the return spring 6 is pressed to the front of the first annular groove 74 by the spring tray 5, the circlip 8 for the shaft is installed in the first annular groove 74; thereby completing the installation of the return spring; and the number of the first and second groups,

even if the rotation of the drive nut 1 is converted into the forward pressure of the spring tray 5, the reaction force of the return spring is too large, and thus it is still necessary to rotate the drive nut 1 by a tool such as a wrench, and it is naturally more preferable to rotate the drive nut 1 by a blower gun.

In order to enable the driving nut 1 to push the press-in sleeve 4 to move forward, in the embodiment, a central through hole through which the stroke screw 2 can pass is formed in the press-in sleeve 4, and the diameter of the central through hole is smaller than the outer diameter of the driving nut 1; thus, when the front end surface of the drive nut 1 abuts against the press-fitting sleeve 4, the drive nut 1 can push the press-fitting sleeve 4 to move forward.

Of course, in other embodiments, the pressing sleeve 4 and the driving nut 1 are fixedly connected or integrally formed, and the purpose that the driving nut 1 pushes the pressing sleeve 4 to move forward can also be achieved.

In this embodiment, as shown in fig. 4, the spring tray 5 includes a cylinder 50, the cylinder 50 is located at the front end of the spring tray 5, and the inner diameter of the cylinder 50 is larger than the diameter of the second shaft 71.

Further preferably, the front end surface of the cylinder 50 extends forwards to form a circle of arc-shaped protrusion 501, the thickness of the arc-shaped protrusion 501 is smaller than that of the cylinder 50, and the arc-shaped protrusion 501 is close to the outer edge of the front end surface of the cylinder 50; thus, when the return spring 6 is compressed by the spring tray 5, the front end of the return spring abuts against the first shaft body 70, the rear end of the return spring abuts against the front end surface of the cylindrical body 50, and the arc-shaped protrusion 501 surrounds the return spring 6 to prevent the return spring 6 from deviating during compression.

Further preferably, at least one notch 502 is arranged on the side wall of the cylinder 50, and the distance between the two side walls of the notch 502 is not less than 5 cm; the reason is so set up is because in the installation of return spring, axle circlip 8 overlaps at first on third axis body 72 for the axle, after spring tray 5 pressed return spring 6 to the place ahead of first annular groove 74, need strut axle circlip 8 and drive it and move forward through axle circlip installation pincers until the card is in first annular groove 74, and it is exactly for the convenience that axle circlip installation pincers can stretch into barrel 50 in order to strut axle circlip 8 that sets up breach 502 on barrel 50.

It should be noted that, in other embodiments, in order to facilitate that the shaft circlip mounting pliers can extend into the cylinder 50 to spread the shaft circlip 8, a radial hole may be further disposed on the side wall of the cylinder 50.

Further preferably, in order to make the circlip 8 for the shaft have a space to be spread in the cylinder 50, a circle of arc-shaped groove 503 is further provided on the inner side wall of the cylinder 50, and the arc-shaped groove 503 is close to the front end face of the cylinder 50.

A quick assembly method for a return spring of a gearbox adopts the tool for assisting the installation of the return spring of the gearbox, and comprises the following specific steps:

step one, sleeving a return spring 6 and a shaft elastic check ring 8 on a transmission shaft 7;

step two, the fixed threaded sleeve 3 is installed on the transmission shaft 7 in a threaded fit mode, the spring tray 5 is installed on the transmission shaft 7 and the fixed threaded sleeve 3 in a sleeved mode, and the press-in sleeve 4 is installed on the fixed threaded sleeve 3 in a sleeved mode;

step three, rotating the driving nut 1 clockwise to enable the driving nut 1 to move forwards on the stroke screw 2, and further pushing the pressing sleeve 4 and the spring tray 5 to move forwards to press the return spring 6 to be in front of the first annular groove 74;

step four, extending the shaft elastic check ring mounting pliers into the spring tray 5, expanding the shaft elastic check ring 8, driving the shaft elastic check ring 8 to move forward to the first annular groove 74, and then loosening the shaft elastic check ring mounting pliers to enable the shaft elastic check ring 8 to be mounted in the first annular groove 74;

step five, rotating the driving nut 1 anticlockwise to detach the driving nut 1 from the stroke screw rod 2, and then sequentially detaching the press-in sleeve 4, the spring tray 5 and the fixed threaded sleeve 3; thereby completing the installation of the return spring.

A quick assembly device for a return spring of a gearbox adopts the quick assembly method for the return spring of the gearbox.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an auxiliary fixtures for installation of gear box return spring, its characterized in that, includes drive nut (1), stroke screw rod (2), fixed swivel nut (3), press-in cover (4) and spring tray (5), fixed swivel nut (3) are installed on transmission shaft (7) that return spring (6) cover was established through screw-thread fit, fixed swivel nut (3), press-in cover (4) and spring tray (5) coaxial distribution, fixed swivel nut (3) are located the inboard of press-in cover (4) and spring tray (5) and respectively with press-in cover (4) and spring tray (5) clearance fit, stroke screw rod (2) and fixed swivel nut (3) fixed mounting or integrated into one piece, drive nut (1) is through screw-thread fit reciprocating motion on stroke screw rod (2) to when drive nut (1) moves forward, the driving nut (1) can push the pressing-in sleeve (4) to move forwards, and then push the spring tray (5) to press the return spring (6) to a specified position.

2. The auxiliary tool for mounting the return spring of the gearbox is characterized in that the transmission shaft (7) at least comprises a first shaft body (70), a second shaft body (71), a third shaft body (72) and a fourth shaft body (73) which are continuously increased in diameter along the direction from front to back, the fixed screw sleeve (3) is mounted on the fourth shaft body (73) in a threaded fit mode, the return spring (6) is mounted on the second shaft body (71) in a sleeved mode, a first annular groove (74) is formed in the second shaft body (71), the first annular groove (74) is close to the third shaft body (72), and after the return spring (6) is pressed to the front of the first annular groove (74) by the spring tray (5), the shaft is mounted in the first annular groove (74) through the elastic check ring (8); thereby completing the installation of the return spring (6).

3. Auxiliary tooling for gearbox return spring installation according to claim 2, characterized in that when the spring tray (5) presses the return spring (6) to a given position, the return spring (6) is located in front of the first annular groove (74).

4. The auxiliary tool for mounting the return spring of the gearbox is characterized in that the pressing sleeve (4) is provided with a central through hole through which the stroke screw rod (2) can pass, and the diameter of the central through hole is smaller than the outer diameter of the driving nut (1).

5. The auxiliary tool for mounting the return spring of the gearbox is characterized in that the pressing sleeve (4) and the driving nut (1) are fixedly connected or integrally formed.

6. An auxiliary tool for mounting a return spring of a gearbox according to claim 1, characterized in that the spring tray (5) comprises a cylinder (50), the cylinder (50) is located at the front end of the spring tray (5), and the inner diameter of the cylinder (50) is larger than the diameter of the second shaft (71).

7. The auxiliary tool for mounting the return spring of the gearbox is characterized in that the front end surface of the cylinder body (50) extends forwards to form a circle of arc-shaped protrusions (501), the thickness of the arc-shaped protrusions (501) is smaller than that of the cylinder body (50), and the arc-shaped protrusions (501) are close to the outer edge of the front end surface of the cylinder body (50).

8. The auxiliary tool for mounting the return spring of the gearbox is characterized in that at least one notch (502) is formed in the side wall of the cylinder (50), and the distance between the two side walls of the notch (502) is not less than 5 cm.

9. The auxiliary tool for mounting the return spring of the gearbox is characterized in that a circle of arc-shaped groove (503) is further formed in the inner side wall of the cylinder body (50), and the arc-shaped groove (503) is close to the front end face of the cylinder body (50).