A mechanism for replacing sliding backing with bearing sliding

Abstract

The utility model discloses a kind of mechanism for bearing sliding to replace sliding backing, including shell, the shell inside is equipped with bearing frame, and synchronous pulley is installed on bearing frame, and synchronous pulley is connected drive motor by synchronous belt, bearing mounting seat is equipped at the two sides of synchronous pulley, bearing is embedded in bearing mounting seat, and bearing and synchronous belt rolling friction. Preferably, the bearing is high-precision ball bearing, and its outer ring is directly contacted with synchronous belt. Preferably, the surface of the synchronous pulley is provided with anti-skid tooth pattern, which is engaged with the tooth groove on the inner side of the synchronous belt. In the utility model, the rolling friction of the bearing roller is used to replace the general sliding gasket, and is used in the mechanism requiring synchronous pulley to make precise transportation, clamping, etc. It can effectively reduce the loss of synchronous conveying belt due to friction, reduce the movement compliance caused by friction, reduce the burden of motor, and prolong the service life of motor.

Description

Technical Field

[0001] This utility model relates to the field of precision mechanical transmission technology, and in particular to a mechanism that uses bearing sliding to replace sliding backing. Background Technology

[0002] In traditional synchronous belt drive systems, sliding backing mechanisms typically use fixed pads (such as nylon, polytetrafluoroethylene, etc.) as the belt support structure. The core principle is to guide and maintain belt tension through sliding friction.

[0003] Existing technologies have the following problems:

[0004] The existing sliding friction coefficient is high, which leads to rapid wear of the belt and the pad contact surface, requiring frequent pad replacement, short maintenance cycle, increased production cost, and the sliding friction is prone to vibration and abnormal noise, affecting the positioning accuracy of precision equipment and causing machining errors. Secondly, the sliding friction torque is large, and the motor needs to output an additional 20%-30% of power to overcome the friction resistance, which significantly increases energy consumption. Moreover, under long-term operation, the friction heat causes the pad material to soften and deform, further aggravating wear.

[0005] To address this issue, we propose a mechanism that utilizes bearing sliding instead of a sliding backing to resolve the aforementioned drawbacks. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mechanism that utilizes bearing sliding to replace the sliding backing.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a mechanism that uses bearing sliding to replace sliding backing, comprising a housing, a support frame inside the housing, and a synchronous pulley mounted on the support frame, the synchronous pulley being connected to a drive motor via a synchronous belt, bearing mounting seats on both sides of the synchronous pulley, bearings being embedded in the bearing mounting seats, and the bearings rolling and rubbing against the synchronous belt.

[0008] Preferably, the bearing is a high-precision ball bearing, and its outer ring is in direct contact with the synchronous belt.

[0009] Preferably, the surface of the synchronous pulley is provided with anti-slip teeth that mesh with the tooth grooves on the inner side of the synchronous belt.

[0010] Preferably, the support frame is fixed to the inner wall of the outer casing by bolts.

[0011] Preferably, the bottom of the housing is provided with heat dissipation holes, and the inside of the housing is coated with a wear-resistant coating.

[0012] Preferably, the bearing mounting base is designed to be detachable and is connected to the support frame via a snap-fit ​​structure.

[0013] Preferably, the drive motor is a servo motor and is electrically connected to an external controller.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention replaces the ordinary sliding pad with the rolling friction of the bearing roller. It is used in mechanisms that require synchronous pulleys to perform precision transportation, clamping, etc. This can effectively reduce the loss of synchronous conveyor belts caused by friction, reduce the motion caused by friction, reduce the burden on the motor, and extend the service life of the motor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a mechanism that utilizes bearing sliding to replace a sliding backing, as proposed in this utility model.

[0018] Figure 2 for Figure 1 Enlarged diagram of A in the middle;

[0019] Figure 3 for Figure 1 A schematic diagram of the external structure.

[0020] Legend:

[0021] 1. Support frame; 2. Synchronous pulley; 3. Bearing; 4. Synchronous belt; 5. Bearing mounting base. Detailed Implementation

[0022] 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.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0024] Please refer to Figure 1-3 A mechanism that uses bearing sliding to replace sliding backing includes a housing, a support frame 1 inside the housing, and a synchronous pulley 2 mounted on the support frame 1. The synchronous pulley 2 is connected to a drive motor through a synchronous belt 4. Bearing mounting seats 5 are provided on both sides of the synchronous pulley 2, and bearings 3 are embedded in the bearing mounting seats 5. The bearings 3 and the synchronous belt 4 roll and rub against each other.

[0025] When used, the rolling friction of the bearing rollers replaces the ordinary sliding pads. When applied to mechanisms that require synchronous pulleys to perform precision transportation, clamping, etc., it can effectively reduce the loss of synchronous conveyor belts caused by friction, reduce the motion caused by friction, reduce the burden on the motor, and extend the service life of the motor.

[0026] It should be noted that:

[0027] Assembly steps: Fix the support frame 1 inside the housing, install the synchronous pulley 2 and bearing 3, and connect the synchronous belt 4 to the drive motor.

[0028] Work process: After the motor is started, the synchronous pulley 2 drives the synchronous belt 4 to move, and the bearing 3 rolls to support the synchronous belt, reducing the frictional resistance by 80%.

[0029] Secondly, the bearing mounting seats 5 are symmetrically distributed on both sides of the synchronous pulley 2 to ensure that the belt is evenly stressed and prevent it from running off-center. By replacing the traditional sliding pad with a rolling bearing 3, sliding friction (friction coefficient ≥ 0.1) is converted into rolling friction (friction coefficient ≤ 0.001), which fundamentally reduces friction loss. The synchronous pulley 2 is linked with the drive motor, and the synchronous belt 4 moves under the support of the bearing 3. The outer ring of the bearing 3 and the contact surface of the synchronous belt 4 form rolling support, avoiding wear caused by sliding friction.

[0030] In this implementation scheme: bearing 3 is a high-precision ball bearing, and its outer ring is in direct contact with the synchronous belt 4.

[0031] Specifically, the surface finish of the outer ring of bearing 3 is Ra≤0.2μm, and the contact surface with the synchronous belt 4 is coated with a silicon nitride wear-resistant layer, which significantly improves its service life.

[0032] In this implementation scheme: the surface of the timing pulley 2 is provided with anti-slip teeth, which mesh with the tooth grooves on the inner side of the timing belt 4.

[0033] Specifically, the toothed meshing design (such as the HTD5M type) ensures the transmission synchronization accuracy (error ≤ 0.1mm), prevents positioning deviation caused by slippage, and the tooth profile of the synchronous pulley 2 is a circular arc tooth with a tooth pitch of 5mm and a tooth height of 2mm; the inner tooth groove of the synchronous belt 4 is made of polyurethane integral molding, and the tooth groove depth matches the tooth height.

[0034] In this implementation scheme: the support frame 1 is fixed to the inner wall of the outer shell by bolts.

[0035] Specifically, the lightweight design of aluminum alloy (such as 6061-T6) reduces weight by 40% while meeting strength requirements (tensile strength ≥310MPa). The load-bearing frame 1 is connected to the outer shell by M8 stainless steel bolts with a preload ≥20N·m. The surface is anodized to improve corrosion resistance and significantly reduce vibration amplitude.

[0036] In this implementation plan: heat dissipation holes are provided at the bottom of the outer casing, and the inside of the outer casing is coated with a wear-resistant coating.

[0037] Specifically, the heat dissipation holes accelerate air convection and reduce the temperature rise of the bearing (operating temperature ≤45℃); the wear-resistant coating (such as tungsten carbide) extends the life of the housing, wherein the heat dissipation holes have a diameter of 5mm, a spacing of 20mm, and are distributed in a matrix; the coating thickness is 50μm and the hardness is ≥1500HV.

[0038] In this implementation scheme: the bearing mounting base 5 adopts a detachable design and is connected to the support frame 1 through a snap-fit ​​structure.

[0039] Specifically, the snap-fit ​​structure (such as spring steel clips) enables quick assembly and disassembly, reducing maintenance time to within 10 minutes.

[0040] In this implementation scheme: the drive motor is a servo motor and is electrically connected to an external controller.

[0041] Specifically, a servo motor (such as the Yaskawa SGMAH type) is used in conjunction with a PID controller to achieve closed-loop speed control (accuracy ±1rpm), adapting to load fluctuations. The controller communicates with the motor via a CAN bus, presets speed curves (such as acceleration time 0.5s, deceleration time 0.3s), and has a dynamic response time ≤10ms, significantly reducing energy consumption.

[0042] In this implementation scheme: the controller is an existing structure, and the control circuit can be implemented by a person skilled in the art through simple programming. It is common knowledge in the art, and it is only used without modification. Therefore, the control method and circuit connection will not be described in detail.

[0043] Working principle: When in use, the rolling friction of the bearing rollers replaces the ordinary sliding pads. When used in mechanisms that require synchronous pulleys to make precision transportation, clamping, etc., it can effectively reduce the loss of synchronous conveyor belts caused by friction, reduce the motion caused by friction, reduce the burden on the motor, and extend the service life of the motor.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mechanism that utilizes bearing sliding instead of a sliding backing, comprising a housing, characterized in that: The housing is provided with a support frame (1) inside, and a synchronous wheel (2) is installed on the support frame (1). The synchronous wheel (2) is connected to the drive motor through a synchronous belt (4). Bearing mounting seats (5) are provided on both sides of the synchronous wheel (2). Bearings (3) are embedded in the bearing mounting seats (5). The bearings (3) and the synchronous belt (4) roll and rub against each other.

2. The mechanism according to claim 1, characterized in that: The bearing (3) is a high-precision ball bearing, and its outer ring is in direct contact with the synchronous belt (4).

3. The mechanism according to claim 1, characterized in that: The surface of the synchronous pulley (2) is provided with anti-slip teeth, which mesh with the tooth grooves on the inner side of the synchronous belt (4).

4. The mechanism according to claim 1, characterized in that: The support frame (1) is fixed to the inner wall of the outer shell by bolts.

5. The mechanism according to claim 1, characterized in that: The bottom of the housing is provided with heat dissipation holes, and the inside of the housing is coated with a wear-resistant coating.

6. The mechanism according to claim 1, characterized in that: The bearing mounting base (5) is designed to be detachable and is connected to the support frame (1) by a snap-fit ​​structure.

7. The mechanism according to claim 1, characterized in that: The drive motor is a servo motor and is electrically connected to an external controller.

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