A guide rail assembly for reducing timing chain walk
By using polyurethane materials and a limiting and fixing mechanism, the problem of axial movement in the timing chain system was solved, resulting in reduced noise, improved wear resistance, and enhanced stability and lifespan of the chain system.
Patent Information
- Application Number
- CN202422254466.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The timing chain system suffers from lateral chain movement. Traditional metal guide rails cannot effectively attenuate vibration energy, resulting in high noise levels and increased wear on the tensioner. Existing vibration damping solutions actually amplify the amplitude when the resonant frequencies overlap.
The guide rail body is made of polyurethane material, and the timing chain is limited and fixed by a limiting and fixing mechanism and baffle. The high damping characteristics of polyurethane are used to absorb vibration. Combined with the design of the limiting rod and the return spring, the guide rail body is stably fixed.
It effectively reduces timing chain slippage, lowers noise levels, improves the wear resistance and anti-aging life of the guide rail, prevents wear between the guide rail and the chain, and enhances the stability and durability of the system.
Smart Images
Figure CN223594877U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to chain guide rail technical field especially relates to a guide rail assembly that reduces positive time chain to shift. BACKGROUND
[0002] With the continuous progress of vehicle manufacturing technology level and industrial development, the timing belt of part engine has been replaced by engine chain. Compared with the traditional belt drive, the chain drive mode transmission is reliable, durable and can also save space. The chain timing system is composed of gear, chain and tensioning device and other components, among which the hydraulic tensioner can automatically adjust the tensioning force, so that the chain tension force is always the same.
[0003] However, the timing chain system has significant defects:
[0004] Chain transverse shift problem: when the engine working condition changes, the chain produces high-frequency transverse vibration, resulting in noise level of 80-85dB(A);
[0005] Limitation of traditional metal guide rail: metal material cannot effectively attenuate vibration energy, which aggravates the wear of tensioner;
[0006] Defects of existing damping scheme: spring damping guide rail will amplify the amplitude due to the overlap of resonance frequency and engine excitation frequency band (200-600Hz).
[0007] At the same time, it is clearly recorded in "Engineering Materials Manual" (Mechanical Industry Press, 2023 edition) on page 485 that polyurethane elastomer has high damping characteristics (tanδ≥0.3), which can convert mechanical vibration energy into heat energy, and is suitable for damping and noise reduction scenes;
[0008] SAE Technical Paper 2017-01-1042 points out that the wear rate of polyurethane with Shore hardness of 90A in automobile guide rail application is only 1 / 3 of that of nylon, and the anti-aging life is >5000 hours.
[0009] Therefore, the present application proposes a guide rail assembly for reducing the shift of timing chain. Utility model content
[0010] Based on the existing chain guide rail technical problems, the utility model provides a guide rail assembly for reducing the shift of timing chain.
[0011] The utility model provides a guide rail assembly for reducing the shift of timing chain, which comprises a fixed frame, the convex side of the fixed frame is fixedly installed with a first fixed lug, the concave side of the fixed frame is fixedly installed with a second fixed lug, one end of the fixed frame is fixedly installed with a cylindrical fixed block, the circular arc surface of the cylindrical fixed block is slidably inserted with a guide rail body, and the surface of the guide rail body is further provided with a limiting fixing mechanism.
[0012] Preferably, the guide rail body comprises a fixed block arranged at one end of the guide rail body, and a fixing groove is arranged on the surface of the fixed block, and the inner side wall of the fixing groove is slidably connected with the arc surface of the cylindrical fixed block.
[0013] Through the above technical scheme, the fixed block is arranged, and the guide rail body is inserted into the fixed frame through the cylindrical fixed block.
[0014] Preferably, the convex surface of the guide rail body is fixedly provided with a baffle on both sides, and an L-shaped insertion block is further fixedly arranged at one end of the guide rail body, and a insertion slot is arranged at one end of the fixed frame, and the outer surface of the L-shaped insertion block is slidably connected with the inner side wall of the insertion slot.
[0015] Through the above technical scheme, the baffle is arranged, and the timing chain is in sliding contact with the baffle, so that the timing chain is limited, and the timing chain is prevented from moving during work. Meanwhile, the material of the guide rail body is polyurethane, which is a commonly used damping material, and has excellent wear resistance and aging resistance, can effectively absorb vibration and reduce noise. The insertion slot is arranged, the L-shaped insertion block on the guide rail body is inserted into the insertion slot, the guide rail body is limited and fixed, and the guide rail body is preliminarily fixed.
[0016] Preferably, the limiting and fixing mechanism comprises a limiting block fixedly arranged on the concave surface of the guide rail body, a sliding groove one is arranged on both sides of the limiting block, a sliding groove two is arranged on the lower part of the limiting block, an L-shaped sliding block is slidably connected with the inner side wall of the sliding groove one, one end of the L-shaped sliding block is further slidably connected with the two side walls of the sliding groove two, one end of the L-shaped sliding block extends to the outside of the sliding groove two, a limiting rod is fixedly arranged on both sides of the sliding groove two, the outer surfaces of the two L-shaped sliding blocks are slidably connected with the arc surfaces of the limiting rods, a reset spring is further fixedly arranged between the opposite surfaces of the two L-shaped sliding blocks, a limiting slot is arranged on the surface of the fixed frame, the inner side wall of the limiting slot is slidably connected with the side surface of the limiting block, and a sliding groove three is arranged on both sides of the limiting slot. The outer surface of the L-shaped sliding block extending to the sliding groove one is slidably connected with the inner side wall of the sliding groove three.
[0017] Through the above technical scheme, the L-shaped sliding block is arranged, the L-shaped sliding block is limited and fixed through the limiting rod, the L-shaped sliding block slides in the sliding groove two, the reset spring is fixedly connected with the two L-shaped sliding blocks, the L-shaped sliding block is provided with pressure, one end of the L-shaped sliding block is inserted into the sliding groove three, the limiting block is fixed in the limiting slot, and the guide rail body is more stably fixed on the fixed frame.
[0018] Preferably, the convex surface of the fixed frame is fixedly provided with a baffle, and the side surface of the baffle is in extrusion contact with the side surface of one of the baffles.
[0019] Through the technical scheme, the blocking strip is arranged to further limit the guide rail body and prevent the guide rail body from moving under the pressure of the timing chain.
[0020] The beneficial effects of the utility model are that:
[0021] 1. The baffle is arranged, the timing chain is in sliding contact with the baffle, the timing chain is limited, the timing chain is prevented from moving during work, the material of the guide rail body is polyurethane, which is a commonly used damping material, has excellent wear resistance and aging resistance, can effectively absorb vibration and reduce noise, the slot is arranged, the L-shaped plug on the guide rail body is inserted into the slot, the guide rail body is limited and fixed, and the guide rail body is preliminarily fixed.
[0022] 2. The L-shaped slider is arranged, the L-shaped slider is limited and fixed through the limiting rod, the L-shaped slider slides in the second sliding groove, the reset spring is fixedly connected with the two L-shaped sliders, the L-shaped slider is provided with pressure, one end of the L-shaped slider is inserted into the third sliding groove, the limiting block is fixed in the limiting groove, and the guide rail body is more stably fixed on the fixing frame.
[0023] 3. The guide rail body and the fixing frame are fixed through the limiting and fixing mechanism, the cylindrical fixed block and the L-shaped plug, so that the fixing frame and the guide rail body can be separately separated and replaced. DRAWINGS
[0024] Figure 1 A guide rail assembly for reducing timing chain movement is provided in the utility model;
[0025] Figure 2 An exploded view of the guide rail assembly for reducing timing chain movement is provided in the utility model;
[0026] Figure 3 A fixing frame structure perspective view of the guide rail assembly for reducing timing chain movement is provided in the utility model;
[0027] Figure 4 A guide rail body structure perspective view of the guide rail assembly for reducing timing chain movement is provided in the utility model;
[0028] Figure 5 A limiting block structure perspective view of the guide rail assembly for reducing timing chain movement is provided in the utility model.
[0029] In the figure: 1, fixed frame; 2, first fixed lug; 3, second fixed lug; 4, cylindrical fixed block; 5, guide rail body; 6, fixed block; 7, fixed slot; 8, baffle; 9, L-shaped plug; 10, plug slot; 11, limit block; 12, sliding groove one; 13, sliding groove two; 14, L-shaped sliding block; 15, limit rod; 16, return spring; 17, limit slot; 18, sliding groove three; 19, blocking bar. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.
[0031] Referring to Figures 1-5 A guide rail assembly for reducing the play of a timing chain, comprising a fixed frame 1, a first fixed lug 2 is fixedly installed on the convex side of the fixed frame 1, a second fixed lug 3 is fixedly installed on the concave side of the fixed frame 1, a cylindrical fixed block 64 is fixedly installed on one end of the fixed frame 1, a guide rail body 5 is slidingly inserted into the arc surface of the cylindrical fixed block 64, and a limiting and fixing mechanism is further arranged on the surface of the guide rail body 5.
[0032] The guide rail body 5 comprises a fixed block 6, the fixed block 6 is arranged at one end of the guide rail body 5, a fixed slot 7 is formed in the surface of the fixed block 6, and the inner side wall of the fixed slot 7 is slidingly inserted into the arc surface of the cylindrical fixed block 4; the fixed block 6 is arranged to insert the guide rail body 5 into the fixed frame 1 through the cylindrical fixed block 4.
[0033] The baffle 8 is fixedly installed on the convex surface of the guide rail body 5, an L-shaped plug 9 is further fixedly installed on one end of the guide rail body 5, a plug slot 10 is formed in one end of the fixed frame 1, and the outer surface of the L-shaped plug 9 is slidingly inserted into the inner side wall of the plug slot 10.
[0034] The baffle 8 is arranged to slidingly contact the timing chain, limit the timing chain, prevent the timing chain from playing during work, and simultaneously set the material of the guide rail body 5 as polyurethane, which is a commonly used damping material, has excellent wear resistance and aging resistance, can effectively absorb vibration and reduce noise, set the plug slot 10, insert the L-shaped plug 9 on the guide rail body 5 into the plug slot 10, and limit and fix the guide rail body 5.
[0035] The limiting and fixing mechanism comprises a limiting block 11 fixedly installed on the concave side of the guide rail body 5, a sliding groove one 12 is formed on the two sides of the limiting block 11, a sliding groove two 13 is formed on the lower part of the limiting block 11, an L-shaped sliding block 14 is slidingly inserted into the inner side wall of the sliding groove one 12, one end of the L-shaped sliding block 14 is also slidingly inserted into the two side walls of the sliding groove two 13, and the one end of the L-shaped sliding block 14 extends to the outside of the sliding groove two 13, limiting rods 15 are fixedly installed on the two sides of the sliding groove two 13, the outer surfaces of the two L-shaped sliding blocks 14 are slidingly inserted into the arc surfaces of the limiting rods 15, a reset spring 16 is also fixedly installed between the opposite surfaces of the two L-shaped sliding blocks 14, a limiting groove 17 is formed on the surface of the fixed frame 1, the inner side wall of the limiting groove 17 is slidingly inserted into the side surface of the limiting block 11, and a sliding groove three 18 is formed on the two sides of the limiting groove 17, and the outer surfaces of the L-shaped sliding blocks 14 extending to the sliding groove one 12 are slidingly inserted into the inner side wall of the sliding groove three 18.
[0036] The L-shaped sliding block 14 is arranged, the L-shaped sliding block 14 is limited and fixed by the limiting rod 15, the L-shaped sliding block 14 slides in the sliding groove two 13, the reset spring 16 is fixedly connected with the two L-shaped sliding blocks 14, pressure is provided for the L-shaped sliding block 14, one end of the L-shaped sliding block 14 is inserted into the sliding groove three 18, the limiting block 11 is fixed in the limiting groove 17, and the guide rail body 5 is more stably fixed on the fixed frame 1.
[0037] The convex side of the fixed frame 1 is fixedly installed with a blocking strip 19, the side surface of the blocking strip is in extrusion contact with the side surface of the one side blocking plate 8, the blocking strip 19 is arranged, the guide rail body 5 is further limited, and movement of the guide rail body 5 under the pressure of the timing chain is prevented.
[0038] Working principle: firstly, the fixed block 6 is inserted into the fixed frame 1 through the fixed groove 7 on the fixed block 6, the guide rail body 5 is rotated, the two L-shaped sliding blocks 14 are slid inward along the limiting rod 15 by hand, the reset spring 16 is compressed, one end of the L-shaped sliding block 14 slides into the inside of the sliding groove two 13, the limiting block 11 can be smoothly inserted into the limiting groove 17, the L-shaped sliding block 14 is released after being inserted into the limiting groove 17, the reset spring 16 is reset, the L-shaped sliding block 14 slides outward, one end of the L-shaped sliding block 14 is inserted into the sliding groove three 18 through the sliding groove two 13, the limiting block 11 is fixed in the limiting groove 17, meanwhile, the L-shaped inserting block 9 is also inserted into the inserting groove 10, the guide rail body 5 is limited and fixed, after the fixing is completed, the first fixed lug 2 and the second fixed lug 3 are fixed in the timing system, the timing chain slides between the two blocking plates 8, the blocking plate 8 limits the timing chain, and movement of the timing chain is prevented.
[0039] The above merely is the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited to this, any skilled person in the technical field according to the technical scheme and the utility model concept of the present utility model is equivalent to replace or change within the technical range disclosed by the present utility model, and should be covered in the protection scope of the present utility model.
Claims
1. A guide rail assembly for reducing the lash of a timing chain, comprising a fixed frame (1), characterized in that: The convex side of the fixing frame (1) is fixedly installed with a first fixing lug (2), the concave side of the fixing frame (1) is fixedly installed with a second fixing lug (3), one end of the fixing frame (1) is fixedly installed with a cylindrical fixed block (4), the circular surface of the cylindrical fixed block (4) is slidably inserted with a guide rail body (5), the surface of the guide rail body (5) is also provided with a limiting fixing mechanism. The guide rail body (5) realizes the action of reducing the movement of the timing chain. The limiting fixing mechanism realizes the action of fixing the guide rail body (5) on the fixing frame (1).
2. A guide rail assembly for reducing the lash of a timing chain as set forth in claim 1, further comprising: The guide rail body (5) comprises a fixed block (6) provided at one end of the guide rail body (5), the surface of the fixed block (6) is provided with a fixed groove (7), and the inner side wall of the fixed groove (7) is slidably inserted with the circular surface of the cylindrical fixed block (6) (4).
3. A guide rail assembly for reducing the lash of a timing chain as set forth in claim 2, wherein: The convex surface of the guide rail body (5) is fixedly installed with a baffle (8) on both sides, one end of the guide rail body (5) is also fixedly installed with an L-shaped plug block (9), one end of the fixing frame (1) is provided with a plug slot (10), and the outer surface of the L-shaped plug block (9) is slidably inserted with the inner side wall of the plug slot (10).
4. A guide rail assembly for reducing the lash of a timing chain as set forth in claim 1, wherein: The limiting fixing mechanism comprises a limiting block (11) fixedly installed on the concave side of the guide rail body (5), slide grooves (12) are formed on both sides of the limiting block (11), a slide groove (13) is formed in the lower part of the limiting block (11), an L-shaped sliding block (14) is slidably inserted with the inner side wall of the slide groove (12), one end of the L-shaped sliding block (14) is also slidably inserted with the two side walls of the slide groove (13), and one end of the L-shaped sliding block (14) extends to the outside of the slide groove (13).
5. A guide rail assembly for reducing the lash of a timing chain as set forth in claim 4, wherein: The two limiting rods (15) are fixedly installed on both sides of the slide groove (13), the outer surfaces of the two L-shaped sliding blocks (14) are slidably inserted with the circular surfaces of the limiting rods (15), and the reset springs (16) are fixedly installed between the opposite surfaces of the two L-shaped sliding blocks (14).
6. A guide rail assembly for reducing the lash of a timing chain as set forth in claim 5, wherein: The surface of the fixing frame (1) is provided with a limiting slot (17), the inner side wall of the limiting slot (17) is slidably inserted with the side surface of the limiting block (11), slide grooves (18) are formed on both sides of the limiting slot (17), and the outer surface of the L-shaped sliding block (14) extending to the slide groove (12) is slidably inserted with the inner side wall of the slide groove (18).
7. A guide rail assembly for reducing the lash of a timing chain as set forth in claim 3, wherein: The convex side of the fixing frame (1) is fixedly installed with a baffle (8), and the side surface of the baffle (8) is in extrusion contact with the side surface of the baffle (8) on one side.