Manual adjustment tensioning wheel with combined belt pulley structure

Abstract

The utility model relates to the technical field of engines, in particular to a combined belt pulley structure manual adjustment tensioning wheel which comprises a support, a combined belt pulley, a bearing, a check ring, a cushion block, a wheel shaft, a fixed mandrel, a dustproof cover and a bolt. The wheel core is machined and manufactured by adopting a forge piece blank machine, the wheel sleeve and the wheel core are connected in a welding mode, and through the scheme, the production efficiency of the belt wheel can be improved, and the weight and the cost of the belt wheel are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a combined pulley structure manual tensioner. Background Technique

[0002] The front-end belt drive of an engine usually adopts a multi-wedge belt and a V-belt drive. In the fields of agricultural machinery, construction machinery, passenger cars, etc., a V-belt drive is usually adopted, and a manual tensioner is usually used to tension the belt. At present, pulleys are usually made of cast blanks and then machined. Due to the large machining allowance of the V-groove of the pulley, the production efficiency is low and the processing cost is high. In this context, it is necessary to develop a lightweight pulley with high production efficiency and low cost. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a combined pulley structure manual tensioner, which has the advantages of effectively reducing the weight of the pulley, improving the production efficiency, and saving the processing cost of the pulley, and solves the problems of large machining allowance of the V-groove of the pulley, low production efficiency, and high processing cost.

[0004] The combined pulley structure manual tensioner of the utility model comprises a bracket, a combined pulley, a bearing, a retaining ring, a cushion block, a wheel shaft, a fixed mandrel, a dust cover and a bolt. The combined pulley comprises two parts, a wheel sleeve and a wheel core. The wheel sleeve is made by a spinning method, the wheel core is made by machining a forging blank, and the wheel sleeve and the wheel core are connected by a welding method. By this scheme, the production efficiency of the pulley can be improved, the weight of the pulley can be reduced, and the cost of the pulley can be reduced.

[0005] The combined pulley structure manual tensioner of the utility model, wherein the bracket comprises a mounting surface, a mounting hole and a U-shaped groove. The manual tensioner is fixed on the engine through the mounting hole on the bracket, and the U-shaped groove determines the adjustment range of the manual tensioner.

[0006] The combined pulley structure manual tensioner of the utility model, wherein the wheel sleeve comprises more than one V-shaped groove, the wheel sleeve is provided with a center positioning hole, the wheel sleeve is made by a sheet metal spinning process, the wheel core is a multi-step structure, and is provided with a bearing mounting hole, a wheel sleeve positioning step, a retaining ring groove, a retaining edge and a dust cover mounting annular groove. The wheel sleeve is mounted at the wheel core positioning step and then connected by a welding method, realizing weight reduction while improving the production efficiency.

[0007] A hand-adjustable tension pulley with a combined pulley structure of the present utility model, wherein the spacer block is of a multi-step structure for adjusting the installation center height of the hand-adjustable tension pulley. The spacer block and the core retaining edge form a dust-proof structure on one side of the hand-adjustable tension pulley bracket. The bearing is a contact-type sealed bearing. The bearing is installed in the inner hole of the pulley. The outer ring of the bearing is in interference fit with the inner hole of the pulley. The axle is of a multi-step structure, including an external hexagonal head and an internal thread. The spacer block, the axle and the inner ring of the bearing are in clearance fit. The retaining ring is a hole-type snap ring and is installed in the retaining ring groove of the core. The fixed mandrel includes a flat square structure, an external thread and a threaded hole that cooperate with the U-shaped groove of the bracket. The bolt is installed in the threaded hole of the fixed mandrel. The dust cover is made of plastic and is installed in the annular groove of the core dust cover.

[0008] A hand-adjustable tension pulley with a combined pulley structure of the present utility model, wherein the fixed mandrel, the spacer block, the bearing, the combined pulley, the retaining ring, the axle and the dust cover are coaxial. The axle is threadedly connected to the fixed mandrel to lock the hand-adjustable tension pulley.

[0009] The installation steps of the tension pulley of the present utility model are as follows: First, fix the bracket on the engine, pre-tighten the axle and the adjusting bolt to a position where the tension meets the requirements, lock the axle, and finally install the dust cover.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. The present utility model includes a bracket, a combined pulley, a bearing, a retaining ring, a spacer block, an axle, a fixed mandrel, a dust cover and a bolt. The combined pulley includes two parts, a pulley sleeve and a core. The pulley sleeve is made by spinning, and the core is made by machining a forging blank. The pulley sleeve and the core are connected by welding. Through this solution, the production efficiency of the pulley can be improved, the weight of the pulley can be reduced, and the cost of the pulley can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0013] Figure 1 is a three-dimensional schematic diagram of the combined pulley of the present utility model;

[0014] Figure 2 is the front view of the hand-adjustable tension pulley with a combined pulley structure of the present utility model;

[0015] Figure 3 is the cross-sectional view of the hand-adjustable tension pulley with a combined pulley structure of the present utility model;

[0016] Figure 4 This is a three-dimensional view of the hand-tensioning pulley of the combined pulley structure of the present utility model.

[0017] In the figure: 1. Bracket; 2. Combined pulley; 201. Sleeve; 202. Pulley core; 3. Bearing; 4. Retaining ring; 5. Spacer block; 6. Axle; 7. Fixed mandrel; 8. Dust cover; 9. Bolt. Specific embodiments

[0018] The following will disclose multiple embodiments of the present utility model in diagrams. For the sake of clear description, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0019] Please refer to Figures 1-4 , a hand-tensioning pulley of a combined pulley structure of the present utility model, includes a bracket 1, a combined pulley 2, a bearing 3, a retaining ring 4, a spacer block 5, an axle 6, a fixed mandrel 7, a dust cover 8 and a bolt 9. The combined pulley 2 includes two parts, a sleeve 201 and a pulley core 202. The sleeve 201 is made by spinning, the pulley core 202 is made by machining a forging blank, and the sleeve 201 and the pulley core 202 are connected by welding. Through this solution, the production efficiency of the pulley can be improved, the weight of the pulley can be reduced, and the cost of the pulley can be reduced.

[0020] The bracket 1 includes a mounting surface, mounting holes, and a U-shaped groove. The hand-tensioning pulley is fixed to the engine through the mounting holes on the bracket 1, and the U-shaped groove determines the adjustment range of the hand-tensioning pulley.

[0021] The sleeve 201 includes more than one V-shaped groove. The sleeve 201 is provided with a central positioning hole. The sleeve 201 is made by a sheet metal spinning process. The pulley core 202 is a multi-step structure, provided with bearing mounting holes, sleeve positioning steps, retaining ring grooves, ribs, and a dust cover mounting annular groove. The sleeve 201 is installed at the positioning step of the pulley core 202, and then connected by welding, which not only reduces the weight but also improves the production efficiency.

[0022] The spacer block 5 has a multi-step structure and is used to adjust the installation center height of the manual tensioning pulley. The spacer block 5 and the edge of the wheel core 202 form a dust-proof structure on one side of the manual tensioning pulley bracket 1. The bearing 3 is a contact-sealed bearing. The bearing 3 is installed in the inner hole of the pulley. The outer ring of the bearing 3 is interference-fitted with the inner hole of the pulley. The wheel shaft 6 has a multi-step structure and includes an external hexagonal head and an internal thread. The spacer block 5, the wheel shaft 6 and the inner ring of the bearing 3 are clearance-fitted. The retaining ring 4 is a hole-type snap ring and is installed in the snap ring groove of the wheel core 202. The fixed mandrel 7 includes a flat square structure, an external thread and a threaded hole that cooperate with the U-shaped groove of the bracket 1. The bolt 9 is installed in the threaded hole of the fixed mandrel 7. The dust cover 8 is made of plastic and is installed in the dust cover annular groove of the wheel core 202.

[0023] The fixed mandrel 7, the spacer block 5, the bearing 3, the combined pulley 2, the retaining ring 4, the wheel shaft 6 and the dust cover 8 are coaxial. The wheel shaft 6 and the fixed mandrel 7 are connected by threads to lock the manual tensioning pulley.

[0024] Steps for installing the tensioning pulley: First, fix the bracket 1 on the engine, pre-tighten the wheel shaft 6 and adjust the bolt 9 to a position where the tension meets the requirements, lock the wheel shaft 6, and finally install the dust cover 8.

[0025] When using the present utility model: The combined pulley 2 includes two parts, a wheel sleeve 201 and a wheel core 202. The wheel sleeve 201 is made by spinning, the wheel core 202 is made by machining a forging blank, and the wheel sleeve 201 and the wheel core 202 are connected by welding. Through this solution, the production efficiency of the pulley can be improved, the weight of the pulley can be reduced, and the cost of the pulley can be reduced.

[0026] The above description is only for the embodiments of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A combined pulley structure manual tensioner, comprising a bracket (1), a combined pulley (2), a bearing (3), a retaining ring (4), a spacer block (5), a wheel axle (6), a fixed mandrel (7), a dust cover (8) and a bolt (9), characterized in that: The combined pulley (2) comprises two parts, namely a pulley sleeve (201) and a pulley core (202). The pulley sleeve (201) is manufactured by spinning, the pulley core (202) is manufactured by machining a forging blank, and the pulley sleeve (201) and the pulley core (202) are connected by welding.

2. The adjustable manual tension pulley of a combined pulley structure according to claim 1, wherein: The bracket (1) includes a mounting surface, mounting holes, and a U-shaped groove. The manual tensioning pulley is fixed to the engine through the mounting holes on the bracket (1), and the U-shaped groove determines the adjustment range of the manual tensioning pulley.

3. The hand - adjustable tension pulley of a combined pulley structure according to claim 1, characterized in that: The pulley sleeve (201) includes more than one V-shaped groove. The pulley sleeve (201) is provided with a central positioning hole and is manufactured by a sheet metal spinning process. The pulley core (202) has a multi-step structure and is provided with bearing mounting holes, a pulley sleeve positioning step, a snap ring groove, a retaining edge, and a dust cover mounting annular groove. The pulley sleeve (201) is installed at the positioning step of the pulley core (202) and then connected by welding.

4. The adjustable manual tensioner of a combined pulley structure according to claim 1, characterized in that: The spacer block (5) has a multi-step structure and is used to adjust the installation center height of the manual tensioning pulley. The spacer block (5) and the retaining edge of the pulley core (202) form a dust-proof structure on one side of the manual tensioning pulley bracket (1). The bearing (3) is a contact seal bearing. The bearing (3) is installed in the inner hole of the pulley, and the outer ring of the bearing (3) is interference-fitted with the inner hole of the pulley. The wheel shaft (6) has a multi-step structure and includes an external hexagonal head and an internal thread. The spacer block (5), the wheel shaft (6), and the inner ring of the bearing (3) are in clearance fit. The snap ring (4) is a hole-type elastic snap ring and is installed in the snap ring groove of the pulley core (202). The fixed mandrel (7) includes a flat square structure, an external thread, and a threaded hole that cooperate with the U-shaped groove of the bracket (1). The bolt (9) is installed in the threaded hole of the fixed mandrel (7). The dust cover (8) is made of plastic and is installed in the dust cover annular groove of the pulley core (202).

5. The hand-adjustable tension pulley of a combined pulley structure according to claim 1, characterized in that: The fixed mandrel (7), the spacer block (5), the bearing (3), the combined pulley (2), the snap ring (4), the wheel shaft (6), and the dust cover (8) are coaxial. The wheel shaft (6) and the fixed mandrel (7) are connected by threads to lock the manual tensioning pulley.

6. The adjustable manual tension pulley with a combined pulley structure according to claim 1, characterized in that: The steps for installing the tensioning pulley are as follows: First, fix the bracket (1) to the engine, pre-tighten the wheel shaft (6) and the adjusting bolt (9) to a position where the tension meets the requirements, lock the wheel shaft (6), and finally install the dust cover (8).

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