阅读说明：本技术 一种柴油机用张紧轮部件 (Tensioning wheel component for diesel engine ) 是由 赵国梁 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种柴油机用张紧轮部件,包括一体式轴承轮和张紧轮支架；一体式轴承轮包括张紧轮、内轴套、滚动体和保持架,滚动体通过保持架安装在张紧轮的内壁与内轴套的外壁形成的滑道内；张紧轮支架包括一体成型的底板和圆柱凸台,内轴套插套圆柱凸台上,圆柱凸台成型有下侧开口的圆孔及以圆孔为中心圆周阵列的多个矩形孔,矩形孔内套接有定位插块,内轴套的内壁上成型有环形凹槽,定位插块的外端插套在环形凹槽内；底板上成型有螺栓孔及以螺栓孔为圆心的弧形槽。本发明通过一体式轴承轮与张紧轮支架连接,能够减少装配工艺,提高张紧轮部件的运行性能；同时它通过定位插块能有效防止一体式轴承轮发生轴向窜动。(The invention discloses a tensioning wheel component for a diesel engine, which comprises an integrated bearing wheel and a tensioning wheel bracket; the integrated bearing wheel comprises a tension wheel, an inner shaft sleeve, a rolling body and a retainer, wherein the rolling body is arranged in a slide way formed by the inner wall of the tension wheel and the outer wall of the inner shaft sleeve through the retainer; the tensioning wheel support comprises a base plate and a cylindrical boss which are integrally formed, the inner shaft sleeve is inserted in the cylindrical boss, the cylindrical boss is formed with a round hole with an opening at the lower side and a plurality of rectangular holes which are circumferentially arrayed by taking the round hole as a center, a positioning insertion block is sleeved in the rectangular holes, an annular groove is formed in the inner wall of the inner shaft sleeve, and the outer end of the positioning insertion block is inserted in the annular groove; the bottom plate is formed with a bolt hole and an arc-shaped groove taking the bolt hole as the center of a circle. According to the invention, the integrated bearing wheel is connected with the tension wheel bracket, so that the assembly process can be reduced, and the running performance of the tension wheel component can be improved; meanwhile, the integrated bearing wheel can be effectively prevented from axially shifting through the positioning insert block.)

1. A tensioning wheel component for a diesel engine comprises an integrated bearing wheel (1) and a tensioning wheel bracket (2); the method is characterized in that: the integrated bearing wheel (1) comprises a tension wheel (11), an inner shaft sleeve (12), a rolling body (13) and a retainer (14), wherein the rolling body (13) is arranged in a slide way (101) formed by the inner wall of the tension wheel (11) and the outer wall of the inner shaft sleeve (12) through the retainer (14);

the tensioning wheel support (2) comprises a base plate (21) and a cylindrical boss (22) which are integrally formed, an inner shaft sleeve (12) is inserted in the cylindrical boss (22), the cylindrical boss (22) is formed with a circular hole (221) with an opening at the lower side and a plurality of rectangular holes (222) which are circumferentially arrayed by taking the circular hole (221) as the center, a positioning insertion block (3) is sleeved in the rectangular holes (222), an annular groove (121) is formed in the inner wall of the inner shaft sleeve (12), and the outer end of the positioning insertion block (3) is inserted in the annular groove (121); the bottom plate (21) is formed with a bolt hole (211) and an arc-shaped groove (212) taking the bolt hole (211) as a circle center.

2. The tensioner component for diesel engines as claimed in claim 1, wherein: the thickness of the positioning insertion block (3) in the axial direction is equal to the width of the rectangular hole (222) in the axial direction and the groove width of the annular groove (121) in the axial direction.

3. The tensioner component for diesel engines as claimed in claim 1, wherein: a threaded hole (222) is formed in the upper bottom surface of the round hole (221); a fastening plug head (4) is sleeved in the round hole (221); the fastening plug head (4) comprises a positioning circular truncated cone (41), a conical truncated cone (42) and a stud (43) which are integrally formed; the inner end of the rectangular inserting plate (3) is pressed against the outer wall of the positioning table (41); the stud (43) is screwed in the threaded hole (222).

4. The tensioner assembly of claim 2 or 3, wherein: the outer end of the positioning insertion block (3) is formed with a guide cone part.

5. The tensioner component for diesel engines as claimed in claim 3, wherein: a counter bore (223) which is eccentrically arranged with the threaded hole (222) is formed above the cylindrical boss (22), a locking round block (5) is sleeved and fixed in the counter bore (223), and a spline shaft (51) which is coaxially arranged with the threaded hole (222) is formed on the lower bottom surface of the locking round block (5); a splined hole (431) matched with the spline shaft (51) is formed in the stud (43), and the lower end of the spline shaft (51) is inserted in the splined hole (431); and a hexagonal hole (411) with an opening at the lower side is formed on the positioning circular truncated cone (41).

6. The tensioner component for diesel engines as claimed in claim 3, wherein: the outer diameter of the positioning round platform (41) is matched with the inner diameter of the round hole (221).

7. The tensioner component for diesel engines as claimed in claim 1, wherein: the arc-shaped slot (212) has a central angle alpha of 10 DEG < alpha <25 deg.

Technical Field

The invention relates to the technical field of engines, in particular to a tensioning wheel component for a diesel engine.

Background

The tensioning wheel is a belt-driven tensioning device, and can be used for tensioning the belt when the center distance of the belt cannot be adjusted. The method is mainly applied to the power output of the small diesel engine. At present, in general belt transmission, the center distance between two pulleys is fixed, the position of a tension pulley is also fixed, the tension pulley deforms and relaxes along with long-term running of a belt, and then the tension degree of the belt is changed by adjusting the position of the tension pulley. The existing tensioning wheel component generally comprises a tensioning wheel, the tensioning wheel is hinged to a tensioning wheel support through a bearing, the tensioning wheel and the bearing are assembled in an interference fit mode, a direct press-fit mode that the bearing is directly pressed into the tensioning wheel is generally adopted by a heavy press, or the tensioning wheel is heated firstly, and then the bearing is pressed into a hot press-fit mode in the tensioning wheel. Although the bearings and the tensioning wheels are standard products for mass production and have high processing precision and quality, no matter what assembling mode is adopted, the performance of the assembled tensioning wheel component is reduced in the assembling process, the assembling process is complicated, and the requirements on the working environment and operating personnel are high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the tension pulley component for the diesel engine, which is connected with the tension pulley bracket through the integrated bearing wheel, can reduce the assembly process and improve the running performance of the tension pulley component; meanwhile, the integrated bearing wheel can be effectively prevented from axially shifting through the positioning insert block.

The scheme for solving the technical problems is as follows:

a tensioning wheel component for a diesel engine comprises an integrated bearing wheel and a tensioning wheel bracket; the integrated bearing wheel comprises a tension wheel, an inner shaft sleeve, a rolling body and a retainer, wherein the rolling body is arranged in a slide way formed by the inner wall of the tension wheel and the outer wall of the inner shaft sleeve through the retainer;

the tensioning wheel support comprises a base plate and a cylindrical boss which are integrally formed, an inner shaft sleeve is sleeved on the cylindrical boss in an inserting mode, the cylindrical boss is formed with a round hole with an opening at the lower side and a plurality of rectangular holes which are circumferentially arrayed by taking the round hole as a center, a positioning insertion block is sleeved in the rectangular holes, an annular groove is formed in the inner wall of the inner shaft sleeve, and the outer end of the positioning insertion block is sleeved in the annular groove in an inserting mode; the bottom plate is formed with a bolt hole and an arc-shaped groove taking the bolt hole as a circle center.

The thickness of the positioning insertion block in the axial direction is equal to the width of the rectangular hole in the axial direction and the groove width of the annular groove in the axial direction.

A threaded hole is formed in the upper bottom surface of the round hole; a fastening plug is sleeved in the round hole; the fastening plug head comprises a positioning circular truncated cone and a frustum stud which are integrally formed; the inner end of the rectangular inserting plate is pressed against the outer wall of the positioning table; the stud is screwed in the threaded hole.

And a guide cone part is formed at the outer end of the positioning insertion block.

A counter bore eccentrically arranged with the threaded hole is formed above the cylindrical boss, a locking round block is sleeved and fixed in the counter bore, and a spline shaft coaxially arranged with the threaded hole is formed on the lower bottom surface of the locking round block; a spline hole matched with the spline shaft is formed in the stud, and the lower end of the spline shaft is inserted and sleeved in the spline hole; and a hexagonal hole with an opening at the lower side is formed on the positioning round platform.

The outer diameter of the positioning round platform is matched with the inner diameter of the round hole.

The central angle of the arc-shaped groove is alpha, 10 degrees < alpha <25 degrees.

The invention has the following outstanding effects: compared with the prior art, the tension wheel bracket is connected with the integrated bearing wheel, so that the assembly process can be reduced, and the running performance of the tension wheel component can be improved; meanwhile, the integrated bearing wheel can be effectively prevented from axially shifting through the positioning insert block.

Drawings

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

FIG. 2 is a cross-sectional view of FIG. 1 taken about A-A;

FIG. 3 is a cross-sectional view of FIG. 2 taken about B-B;

FIG. 4 is an enlarged view of a portion of FIG. 2 about C;

FIG. 5 is a schematic view of the present invention in partial assembly with a belt.

Detailed Description