Wheel shaft sleeve for synchronous pulley

Abstract

The utility model relates to the technical field of synchronous belts, and discloses a wheel shaft sleeve for a synchronous pulley, which comprises a shaft sleeve and a connecting plate, the connecting plate is fixedly connected to the upper end of the shaft sleeve, side plates are fixedly connected to the front surface and the rear surface of the connecting plate, and five oil grooves are formed in the inner wall of the shaft sleeve in a front-back array mode. Six connecting oil grooves are formed in the inner wall of the shaft sleeve in an annular array mode, first reinforcing grooves are formed in the upper surface of the connecting plate, the same first reinforcing grooves are formed in the left surface and the right surface of the connecting plate, second reinforcing grooves are formed in the upper surfaces of the two side plates, and the same second reinforcing grooves are formed in the left surface and the right surface of the two side plates. Through the design of the oil grooves and the connecting oil grooves, the flowing path of lubricating oil is increased, lubricating is more sufficient and comprehensive, heat dissipation is more efficient, the service life of the shaft sleeve and the service life of the shaft are prolonged, and through the design of the first reinforcing grooves, the second reinforcing grooves and the reinforcing ribs, the strength and rigidity of the wheel shaft sleeve are enhanced while the weight of the wheel shaft sleeve is reduced and light weight is achieved.

Description

Technical Field

[0001] This utility model relates to the field of synchronous belt technology, specifically to a wheel and axle sleeve for a synchronous belt pulley. Background Technology

[0002] Synchronous pulleys are mechanical transmission components that work in conjunction with synchronous belts to achieve precise power transmission. They belong to the meshing type of transmission device, transmitting motion and power through the precise meshing of the pulley teeth and the synchronous belt teeth, completely solving the slippage problem of traditional friction belt drives and ensuring a constant transmission ratio. Their core characteristics are significant: transmission efficiency of over 98% with low energy loss; high transmission precision with no relative slippage, suitable for scenarios requiring strict speed and position control; compact structure, more flexible center distance requirements compared to gear drives; low operating noise and easy maintenance. Structurally, the main body is the pulley base, with evenly distributed teeth (commonly trapezoidal or circular arc teeth) on the outer circumference. Some pulleys have side guards to prevent the synchronous belt from slipping off. The inner hole often features keyways, tapered holes, or expansion sleeves for shaft connection. Materials are selected according to working conditions: gray cast iron is used for conventional scenarios, steel is suitable for high loads, aluminum alloy is suitable for high-speed transmission, and engineering plastics are used for lightweight, low-noise equipment. They are widely used in machine tools, printing machinery, medical devices, automotive accessories, automated robots, and other fields, and are a core component for precision transmission.

[0003] The timing belt pulley bushing is a key connecting component between the timing belt pulley and the shaft. Its main function is to achieve precise matching between the pulley and the shaft, reduce wear, and ensure transmission stability. It is an important auxiliary component of the timing belt drive system. Currently, when using the bushing, there is relative rotation or reciprocating motion between the shaft and the bushing, which generates a large friction force. Friction will lead to accelerated wear on the surfaces of the shaft and the bushing, thereby affecting the transmission accuracy and normal operation of the equipment. The bushing and the shaft are usually in close contact, and the flow path of lubricating oil is limited, which can easily lead to insufficient local lubrication. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a wheel bushing for a synchronous belt pulley. It solves the problem that when using the wheel bushing, there is relative rotation or reciprocating motion between the shaft and the bushing, which generates a large friction force. This friction leads to increased wear on the surfaces of the shaft and the bushing, thereby affecting the transmission accuracy and normal operation of the equipment. Furthermore, the bushing and the shaft are usually in close contact, resulting in limited flow paths for lubricating oil and a tendency for localized insufficient lubrication.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wheel bushing for a timing belt pulley, comprising a bushing and a connecting plate, wherein the connecting plate is fixedly connected to the upper end of the bushing, and side plates are fixedly connected to both the front and rear surfaces of the connecting plate;

[0008] The inner wall of the bushing has five oil grooves arranged in a front-to-back array, and the inner wall of the bushing has six connecting oil grooves arranged in a ring array. The upper surface of the connecting plate has a first reinforcing groove, and the left and right surfaces of the connecting plate have the same first reinforcing groove.

[0009] Preferably, the upper surface of both side plates is provided with a second reinforcing groove, and the left and right surfaces of both side plates are provided with the same second reinforcing groove, and the six second reinforcing grooves are respectively connected to the interior of the corresponding first reinforcing groove.

[0010] Preferably, the front and rear surfaces of the connecting plate are fixedly connected with reinforcing ribs, the upper ends of the two reinforcing ribs are fixedly connected to the two side plates respectively, and the lower ends of the two reinforcing ribs are fixedly connected to the bushings.

[0011] Preferably, the depth of the connecting oil trough is the same as that of the oil trough.

[0012] Preferably, the reinforcing ribs are symmetrically installed on the front and rear surfaces of the connecting plate.

[0013] Preferably, a guide rounded corner is provided at the junction of the first reinforcing groove and the second reinforcing groove.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides a wheel and axle sleeve for a timing belt pulley, which has the following advantages:

[0016] 1. The timing belt pulley bushing, through the design of oil grooves and connecting oil grooves, increases the flow path of lubricating oil, making lubrication more thorough and comprehensive, heat dissipation more efficient, and extending the service life of the bushing and shaft. The design of the first reinforcing groove, the second reinforcing groove and the reinforcing ribs reduces the weight of the bushing, achieving lightweighting, while enhancing the strength and rigidity of the bushing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall front view of the wheel and axle sleeve for the synchronous belt pulley of this utility model;

[0018] Figure 2 This is a top view of the overall structure of the wheel and axle sleeve for the synchronous belt pulley of this utility model;

[0019] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4This is a top view of the internal cross-section structure of the wheel and axle sleeve for the synchronous belt pulley of this utility model;

[0021] Figure 5 This is a front view of the internal cross-section structure of the wheel bushing for the synchronous belt pulley of this utility model.

[0022] In the diagram: 1. Bushing; 2. Connecting plate; 3. Side plate; 4. Oil groove; 5. Connecting oil groove; 6. First reinforcing groove; 7. Second reinforcing groove; 8. Reinforcing rib. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a new technical solution: a wheel bushing for a timing belt pulley, including a bushing 1 and a connecting plate 2, the connecting plate 2 being fixedly connected to the upper end of the bushing 1, and side plates 3 being fixedly connected to both the front and rear surfaces of the connecting plate 2;

[0025] Five oil grooves 4 are arranged in a front-to-back array on the inner wall of the bushing 1. Six connecting oil grooves 5 are arranged in a ring array on the inner wall of the bushing 1. A first reinforcing groove 6 is provided on the upper surface of the connecting plate 2. The same first reinforcing groove 6 is provided on both the left and right surfaces of the connecting plate 2.

[0026] Furthermore, the upper surface of both side plates 3 is provided with a second reinforcing groove 7, and the left and right surfaces of both side plates 3 are provided with the same second reinforcing groove 7. The six second reinforcing grooves 7 are respectively connected to the interior of the corresponding first reinforcing groove 6.

[0027] Furthermore, the design of oil groove 4 and connecting oil groove 5 increases the flow path of lubricating oil, making lubrication more thorough and comprehensive, heat dissipation more efficient, and extending the service life of bushing and shaft. The design of first reinforcing groove 6, second reinforcing groove 7 and reinforcing rib 8 reduces the weight of wheel bushing to achieve lightweighting, while enhancing the strength and rigidity of wheel bushing.

[0028] Furthermore, the front and rear surfaces of the connecting plate 2 are fixedly connected with reinforcing ribs 8, the upper ends of the two reinforcing ribs 8 are fixedly connected to the two side plates 3 respectively, and the lower ends of the two reinforcing ribs 8 are fixedly connected to the bushing 1.

[0029] Furthermore, the depth of the connecting oil trough 5 is the same as that of the oil trough 4.

[0030] Furthermore, the reinforcing ribs 8 are symmetrically installed on the front and rear surfaces of the connecting plate 2.

[0031] Furthermore, a guide rounded corner transition is provided at the junction of the first reinforcing groove 6 and the second reinforcing groove 7.

[0032] Furthermore, five oil grooves 4 are arranged in a front-to-back array along the axial direction of the bushing 1, which can store and guide lubricating oil to be evenly distributed on the mating surfaces of the bushing and the shaft, achieving continuous lubrication and reducing friction and wear. Six connecting oil grooves 5 are arranged in a ring and cooperate with the oil grooves 4 to form a crisscrossing lubrication channel network, allowing the lubricating oil to cover more comprehensively, further optimizing the lubrication effect, and at the same time assisting in heat dissipation, preventing the bushing from deforming due to frictional heat. The overall structure, as the basic load-bearing component of the wheel bushing, provides installation support for the connecting plate 2, side plate 3, etc., ensuring the fit and connection between the wheel bushing and the synchronous belt pulley and shaft, transmitting torque and bearing capacity. The first reinforcing groove 6 is formed on the upper and left and right surfaces. By hollowing out part of the material, the overall weight of the wheel axle sleeve is reduced without significantly reducing strength, thus achieving lightweighting. At the same time, it changes the stress transmission path, disperses concentrated stress, improves the deformation resistance of the connecting plate, and enhances the structural stability of the wheel axle sleeve. The second reinforcing groove 7 is connected to the first reinforcing groove 6, extending the effective range of the reinforcing groove and further expanding the stress dispersion path, so that the stress at the connection between the connecting plate and the side plate is more evenly distributed, improving the strength and rigidity of the side plate itself and the connection part with the connecting plate. At the same time, it optimizes the weight of the wheel axle sleeve in line with the lightweighting requirements.

[0033] Structural Description: Bushing 1: As a basic load-bearing component, it provides installation support for connecting plate 2, etc. The inner wall oil groove 4 and connecting oil groove 5 are used to store and guide lubricating oil to achieve lubrication between the shaft and bushing and ensure stable transmission.

[0034] Connecting plate 2: Connects bushing 1 and side plate 3, integrating components into a whole. Its first reinforcing groove 6 can reduce weight, disperse stress, and improve the stability and lightweight level of the wheel bushing structure.

[0035] Side plate 3: There are two in total, which reinforce the connecting plate 2 from the front and rear directions and widen the lateral stress surface; the second reinforcing groove 7 is connected to the first reinforcing groove 6 to optimize stress distribution and enhance its own and the strength of the connecting parts;

[0036] Oil groove 4: There are five in total, which are opened along the axial direction of bushing 1. They can store lubricating oil, continuously supply oil to the mating surface of the shaft and bushing, reduce friction and wear, assist in heat dissipation, and extend the service life of the components.

[0037] Connecting oil grooves 5: There are six in total, arranged in a ring around the circumference of the bushing 1, and connected to the oil grooves 4 to form a lubrication channel network, so that the lubricating oil is evenly distributed, improving the lubrication effect, and the consistent depth ensures smooth flow of oil.

[0038] First reinforcing groove 6: There are three in total, which are opened on the upper surface and left and right surfaces of the connecting plate 2. They change the stress path, disperse concentrated stress, and enhance the deformation resistance of the connecting plate while reducing weight and stabilizing the structure.

[0039] The second reinforcing groove 7: There are six of them in total. They are opened on the side plate 3 and communicate with the first reinforcing groove 6. They extend the stress distribution range, optimize the strength and rigidity of the side plate and the connection part with the connecting plate, and meet the requirements of lightweighting.

[0040] Reinforcing Rib 8: Efficiently transmits force, optimizes the force transmission path, improves the overall torsional and bending resistance of the wheel and axle sleeve, and the symmetrical distribution makes the force more balanced.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bushing for a timing belt pulley, characterized in that: It includes a bushing (1) and a connecting plate (2). The connecting plate (2) is fixedly connected to the upper end of the bushing (1). Side plates (3) are fixedly connected to both the front and rear surfaces of the connecting plate (2). Five oil grooves (4) are arranged in a front-to-back array on the inner wall of the bushing (1), and six connecting oil grooves (5) are arranged in a ring array on the inner wall of the bushing (1). A first reinforcing groove (6) is provided on the upper surface of the connecting plate (2), and the same first reinforcing groove (6) is provided on both the left and right surfaces of the connecting plate (2).

2. The wheel and axle sleeve for a timing pulley according to claim 1, characterized in that: The upper surfaces of both side plates (3) are provided with second reinforcing grooves (7), and the left and right surfaces of both side plates (3) are provided with the same second reinforcing grooves (7). The six second reinforcing grooves (7) are respectively connected to the interior of the corresponding first reinforcing grooves (6).

3. The wheel and axle sleeve for a timing pulley according to claim 1, characterized in that: The front and rear surfaces of the connecting plate (2) are fixedly connected with reinforcing ribs (8). The upper ends of the two reinforcing ribs (8) are fixedly connected to the two side plates (3) respectively, and the lower ends of the two reinforcing ribs (8) are fixedly connected to the bushing (1).

4. The wheel and axle sleeve for a timing belt pulley according to claim 1, characterized in that: The depth of the connecting oil tank (5) is the same as that of the oil tank (4).

5. The wheel and axle sleeve for a timing pulley according to claim 3, characterized in that: The reinforcing ribs (8) are symmetrically installed on the front and rear surfaces of the connecting plate (2).

6. The wheel and axle sleeve for a timing pulley according to claim 2, characterized in that: The first reinforcing groove (6) and the second reinforcing groove (7) are connected by a guide rounded corner transition.

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