CN214007940U

CN214007940U - Tension wheel

Info

Publication number: CN214007940U
Application number: CN202023162285.9U
Authority: CN
Inventors: 陈国亮
Original assignee: Taizhou Engi Automobile Parts Co ltd
Current assignee: Taizhou Engi Automobile Parts Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-20
Anticipated expiration: 2030-12-24

Abstract

The utility model provides a tight pulley that rises belongs to the auto-parts field. It has solved the inconvenient problem of current tight pulley equipment that rises. The tension roller comprises a stamping arm and a mandrel arranged on the front side of the stamping arm, wherein a ring-shaped roller shell is sleeved outside the front end of the mandrel, the axial section of the roller shell is approximately U-shaped, the mandrel is solid and cylindrical, an outer ring coaxial with the mandrel is arranged between the front end of the mandrel and the roller shell, and the roller shell is fixedly connected with the outer ring; the outer circumferential surface of the front end of the mandrel is provided with an annular outer raceway, an annular inner raceway is correspondingly arranged on the outer ring, a retainer is arranged between the inner raceway and the outer raceway, a circle of pocket holes are formed in the retainer, and a ball body matched with the inner raceway and the outer raceway is arranged in each pocket hole; the positioning ring is integrally formed on the rear end face of the mandrel, the punching arm is provided with a jack which penetrates through the mandrel in the axial direction and is matched with the positioning ring, the positioning ring is inserted and embedded in the jack, and the rear end face of the mandrel is tightly pressed on the punching arm. The tension roller is convenient to assemble.

Description

Tension wheel

Technical Field

The utility model belongs to the auto-parts field relates to a tight pulley that rises.

Background

The tension wheel is used as an important part on the engine and rotates in a waist hole in the center of a bearing of the tension wheel. The belt is supported, and the vibration of the belt span is reduced.

The existing tension wheel such as the tension wheel (application number: 201820159359.7) proposed by the applicant comprises an aluminum arm, the lower end of the aluminum arm is a tubular connecting part, core sleeves are fixed in two ends of the connecting part, the two core sleeves are opposite, a ball bearing is arranged on one side of the upper end of the aluminum arm and is positioned right above the connecting part, the upper end of the aluminum arm and the ball bearing are distributed along the axial direction of the connecting part, a shaft sleeve is arranged in the ball bearing, the axes of the shaft sleeve and the connecting part are parallel, a cylindrical wheel shell is sleeved outside the ball bearing, the shaft sleeve and the wheel shell are fixedly connected with the inner ring and the outer ring of the ball bearing respectively, and the aluminum arm and the shaft sleeve are fixedly connected through a bolt assembly.

In the tension wheel, the aluminum arm is connected with the shaft sleeve through the bolt assembly, the wheel shell is connected with the shaft sleeve through the ball bearing, the whole installation process has more steps, and the assembly is more complicated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a tight wheel that rises convenient to equipment.

The purpose of the utility model can be realized by the following technical proposal: a tension roller comprises a stamping arm and a mandrel arranged on the front side of the stamping arm, wherein a ring-shaped roller shell is sleeved outside the front end of the mandrel, and the axial section of the roller shell is approximately U-shaped; the outer circumferential surface of the front end of the mandrel is provided with an annular outer raceway, an annular inner raceway is correspondingly arranged on the outer ring, a retainer is arranged between the inner raceway and the outer raceway, a circle of pocket holes are formed in the retainer, and a ball body matched with the inner raceway and the outer raceway is arranged in each pocket hole; the positioning ring is integrally formed on the rear end face of the mandrel, the punching arm is provided with a jack which penetrates through the mandrel in the axial direction and is matched with the positioning ring, the positioning ring is inserted and embedded in the jack, and the rear end face of the mandrel is tightly pressed on the punching arm.

During actual production, the nonstandard bearing part consisting of the mandrel, the outer ring, the retainer and the ball body can be replaced by a bearing factory, so that the tension pulley factory only needs to complete two working procedures of connecting the wheel shell and the outer ring and press-mounting the mandrel and the stamping arm, the mounting steps are fewer, and the assembly is more convenient.

In the tension wheel, the shape and the size of the outer side wall of the outer ring are matched with the inner hole of the wheel shell, and the wheel shell is tightly and fixedly connected with the outer ring in a matched mode, namely the outer ring is connected with the wheel shell without other parts, and the outer ring is only required to be pressed into the inner hole of the wheel shell, so that the installation steps are further simplified, and the assembly is facilitated.

In the tension wheel, the rear end of the wheel shell is bent inwards to form an annular flange, the annular flange is positioned between the outer ring and the punching arm, and the annular flange is pressed on the rear end face of the outer ring. The annular flanges are designed to limit the mounting position of the wheel shell, so that the wheel shell is mounted in place at one time, and assembly is facilitated.

In the tension pulley, framework oil seals are arranged between two ends of the outer ring and the mandrel, and the ball body is positioned between the two framework oil seals so as to block impurities such as external dust outside the ball body and ensure smooth and stable rotation of the outer ring.

In the tension wheel, the rear end face of the positioning ring is flush with the rear side face of the punching arm.

In the tension wheel, the inner hole at the rear end of the positioning ring is a conical surface with the diameter gradually increasing from front to back.

Compared with the prior art, the tension wheel has the following advantages:

1. during actual production, the nonstandard bearing part consisting of the mandrel, the outer ring, the retainer and the ball body can be replaced by a bearing factory, so that the tension pulley factory only needs to complete two working procedures of connecting the wheel shell and the outer ring and press-mounting the mandrel and the stamping arm, the mounting steps are fewer, and the assembly is more convenient.

2. The wheel shell and the outer ring are tightly matched and fixedly connected, namely the outer ring and the wheel shell are connected without other parts, and the outer ring is only required to be pressed into an inner hole of the wheel shell, so that the installation steps are further simplified, and the assembly is convenient.

Drawings

Fig. 1 is a schematic structural diagram of a tension wheel.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a front view of the tension roller.

In the figure, 1, a punching arm; 2. a mandrel; 2a, an outer raceway; 2b, a positioning ring; 2b1, a tapered surface; 3. a wheel housing; 3a, an annular flange; 4. an outer ring; 4a, an inner raceway; 5. a holder; 6. a sphere; 7. and (5) framework oil seal.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 3, the tension roller includes a punching arm 1 and a mandrel 2 disposed at the front side of the punching arm 1, a ring-shaped roller housing 3 is sleeved outside the front end of the mandrel 2, and the axial cross section of the roller housing 3 is substantially U-shaped.

Particularly, dabber 2 is solid cylindric, is equipped with the outer loop 4 coaxial with dabber 2 between 2 front ends of dabber and the wheel shell 3, and wheel shell 3 links firmly with outer loop 4. In this embodiment, the shape and size of the outer side wall of the outer ring 4 are matched with the inner hole of the wheel housing 3, and the wheel housing 3 and the outer ring 4 are tightly matched and fixedly connected, namely, the outer ring 4 and the wheel housing 3 are connected without other parts, and only the outer ring 4 is required to be pressed into the inner hole of the wheel housing 3, so that the assembly is facilitated by simplifying the installation steps. Naturally, it is also possible for the wheel housing 3 to be fixedly connected to the ring body by means of fasteners such as screws, rivets, etc. Further, the rear end of the wheel housing 3 is bent inward to form an annular rib 3a, the annular rib 3a is located between the outer ring 4 and the punching arm 1, and the annular rib 3a is pressed on the rear end surface of the outer ring 4. The annular rib 3a is designed to limit the mounting position of the wheel housing 3, so that the wheel housing 3 is mounted in place at one time, and assembly is facilitated.

As shown in fig. 1 and 2, a circular outer raceway 2a is formed on the outer peripheral surface of the front end of the mandrel 2, a circular inner raceway 4a is correspondingly formed on the outer ring 4, a retainer 5 is arranged between the inner raceway 4a and the outer raceway 2a, a circle of pocket holes are formed in the retainer 5, a ball body 6 used for being matched with the inner raceway 4a and the outer raceway 2a is arranged in each pocket hole, at the moment, the mandrel 2 and the wheel housing 3 form a similar bearing structure, and the mandrel 2 and the wheel housing 3 are rotatably connected. In the present embodiment, the structures and the assembling manners of the cage 5, the balls 6, the inner raceway 4a and the outer raceway 2a are all conventional, and specific reference is made to the conventional bearing structure. All be equipped with skeleton oil blanket 7 between the both ends of outer loop 4 and the dabber 2, and spheroid 6 is located between two skeleton oil blankets 7 to stop impurity such as outside dust outside spheroid 6, ensure that outer loop 4 is smooth and easy, stable the rotation. Integrated into one piece has holding ring 2b on 2 rear end faces of dabber, and holding ring 2b is coaxial with dabber 2, is equipped with on the punching press arm 1 along 2 axial penetrations of dabber and with the jack that holding ring 2b matches, and the inlay is inserted in the jack to holding

ring

2b, and 2 rear end faces of dabber sticiss on punching press arm 1. Preferably, the rear end face of the positioning ring 2b is flush with the rear side of the punch arm 1.

In this embodiment, the inner hole at the rear end of the positioning ring 2b is a tapered surface 2b1 with a diameter gradually increasing from front to back. During actual production, the nonstandard bearing part consisting of the mandrel 2, the outer ring 4, the retainer 5 and the ball body 6 can be replaced by a bearing factory, so that the tension pulley factory only needs to complete two working procedures of connecting the wheel shell 3 with the outer ring 4 and press-fitting the mandrel 2 and the stamping arm 1, the installation steps are fewer, and the assembly is more convenient. During actual assembly, the mandrel 2 is pressed and positioned on the mounting platform through the limiting rod extending into the positioning ring 2b, and then the wheel shell 3 and the stamping arm 1 are pressed in sequence to complete assembly.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A tension roller comprises a stamping arm (1) and a mandrel (2) arranged on the front side of the stamping arm (1), wherein a circular wheel shell (3) is sleeved outside the front end of the mandrel (2), the axial section of the wheel shell (3) is approximately U-shaped, the tension roller is characterized in that the mandrel (2) is in a solid cylindrical shape, an outer ring (4) coaxial with the mandrel (2) is arranged between the front end of the mandrel (2) and the wheel shell (3), and the wheel shell (3) is fixedly connected with the outer ring (4); the outer circumferential surface of the front end of the mandrel (2) is provided with a circular outer raceway (2a), the outer ring (4) is correspondingly provided with a circular inner raceway (4a), a retainer (5) is arranged between the inner raceway (4a) and the outer raceway (2a), the retainer (5) is provided with a circle of pocket holes, and each pocket hole is internally provided with a ball (6) matched with the inner raceway (4a) and the outer raceway (2 a); integrated into one piece has holding ring (2b) on dabber (2) rear end face, is equipped with on punching press arm (1) along dabber (2) axial run through and with the jack that holding ring (2b) match, and inlay in the jack is inserted in holding ring (2b), and dabber (2) rear end face sticiss on punching press arm (1).

2. The tension roller according to claim 1, wherein the outer side wall of the outer ring (4) is matched with the inner hole of the roller housing (3) in shape and size, and the roller housing (3) and the outer ring (4) are tightly and fixedly connected.

3. The tension roller according to claim 2, wherein the rear end of the roller housing (3) is bent inward to form an annular rib (3a), the annular rib (3a) is located between the outer ring (4) and the punching arm (1), and the annular rib (3a) presses on the rear end face of the outer ring (4).

4. The tension roller according to claim 1, 2 or 3, wherein framework oil seals (7) are arranged between the two ends of the outer ring (4) and the mandrel (2), and the ball body (6) is positioned between the two framework oil seals (7).

5. The tension roller according to claim 1, wherein the rear end face of the positioning ring (2b) is flush with the rear side of the punching arm (1).

6. The tension roller as claimed in claim 1, wherein the inner hole at the rear end of the positioning ring (2b) is a conical surface (2b1) with a diameter gradually increasing from front to back.