Eccentric crankshaft without additional counter weight for warp knitting machine

Abstract

The utility model relates to an additional counterweight-free eccentric crankshaft for a warp knitting machine, which comprises a plurality of circle center shaft bodies and eccentric shaft bodies which are alternately arranged and jointly connected into a shaft, and the crankshaft is provided with at least one shaft head for mounting at one end; the eccentric shaft body is provided with a notch used for subtracting weight, the notch is predetermined according to dynamic balance calculation in the design stage, and materials are removed in the machining process to achieve dynamic balance. By innovatively optimizing the design and manufacturing process of the eccentric crankshaft, not only are the problems in the traditional design solved, but also a series of beneficial effects of improving the dynamic balance performance, prolonging the service life of equipment, improving the operation efficiency, optimizing the use of lubricating oil, being easy to produce and maintain and improving the product competitiveness are provided. Therefore, substantive benefits are brought to users of related mechanical equipment such as the warp knitting machine.

Description

Technical Field

[0001] The utility model relates to the field of textile machinery, in particular to an eccentric crankshaft for a warp knitting machine which does not require additional counterweights. Background Art

[0002] In the field of textile machinery, especially in the design and operation of warp knitting machines, the eccentric crankshaft is a key component responsible for converting the rotational motion of the motor into the reciprocating or vibrating motion required by other components. This conversion plays a vital role in controlling the structure and quality of textiles. Traditional eccentric crankshafts usually consist of a series of eccentric mass blocks distributed at different positions of the shaft to generate the required motion.

[0003] However, the traditional eccentric crankshaft design faces multiple challenges in practical applications. First, the non-optimized mass distribution will lead to excessive vibration and noise at high speeds, which not only affects the operational stability of the machine, but also over time, excessive vibration will cause premature wear of mechanical components and reduce the service life of the equipment. Secondly, because the crankshaft needs to run in lubricating oil during operation, the resistance characteristics of the lubricating oil to the crankshaft will also affect its dynamic balancing performance. It is difficult for traditional crankshafts to achieve the ideal dynamic balancing standard during the manufacturing process, and additional balancing corrections are required in the later stage, which will increase production costs and time.

[0004] In addition, the operation of the crankshaft in lubricating oil also involves fluid dynamics. The viscosity and fluid resistance of the lubricating oil may have a significant impact on the dynamic response of the crankshaft, especially under high-speed operation conditions. Traditional designs often ignore this effect of lubricating oil, resulting in inaccurate adjustment of the crankshaft dynamic balance, which further increases energy consumption and reduces the overall efficiency of the warp knitting machine.

[0005] Some solutions currently on the market include using various balancing mechanisms and vibration dampers to reduce this vibration, but these solutions often increase the complexity and cost of the machine and may sacrifice the operating efficiency of the equipment while reducing vibration. In addition, these solutions fail to fully address the impact of lubricant resistance on dynamic balance.

[0006] Therefore, there is an urgent need to develop a new eccentric crankshaft design that can not only reduce vibration and noise while maintaining or improving power transmission efficiency, improve the operating stability and service life of mechanical equipment, but also adapt to changes in resistance in the lubricating oil and optimize the efficiency of lubricating oil use. The new design should also take into account ease of manufacturing so that it can be produced without adding too much cost, while achieving more accurate dynamic balancing adjustment and reducing the need for post-processing and balancing correction. Utility Model Content

[0007] The utility model proposes an eccentric crankshaft for a warp knitting machine that does not require additional counterweights. The eccentric crankshaft for a warp knitting machine that does not require additional counterweights not only solves the problems existing in traditional designs, but also provides a series of beneficial effects, including improved dynamic balancing performance, extended equipment service life, improved operating efficiency, optimized lubricating oil usage, easy production and maintenance, and improved product competitiveness, thereby bringing substantial benefits to users of warp knitting machines and other related mechanical equipment.

[0008] The technical solution of the utility model is as follows:

[0009] An eccentric crankshaft for a warp knitting machine that does not require additional counterweights comprises: a plurality of circular shaft bodies and eccentric shaft bodies that are alternately arranged and connected together to form an axis, the crankshaft having at least one shaft head at one end for installation; a cutout for reducing weight is provided on the eccentric shaft body, the cutout is predetermined based on a dynamic balance calculation in the design stage, and material is removed through a machining process to achieve dynamic balance.

[0010] The number and position of the eccentric shafts are designed according to the specific weaving requirements and power transmission requirements of the warp knitting machine.

[0011] Wherein, the shaft head is designed as a cylindrical joint so as to be connected with a transmission component or a driving motor shaft in the warp knitting machine.

[0012] Wherein, the incision is determined and machined by computer-aided design and computer-aided manufacturing technology.

[0013] The cutout is designed to extend along the radial direction of the central axis and has a certain depth and width to ensure the stability of the eccentric crankshaft during high-speed rotation.

[0014] The bottom surface of the cutout is an outwardly convex arc surface, so as to reduce the resistance of the lubricating oil immersed in the box body during high-speed rotation.

[0015] Wherein, the cutout on the central shaft body is also subjected to a surface treatment process, including polishing or plating.

[0016] The eccentric crankshaft is made of corrosion-resistant and high-strength materials to adapt to the working conditions of the warp knitting machine under high-speed operation and constantly changing loads.

[0017] A warp knitting machine, comprising:

[0018] At least one of the eccentric crankshafts.

[0019] The utility model has the following beneficial effects:

[0020] The eccentric crankshaft provided by the utility model is carefully designed and optimized, and adopts a series of innovative measures to improve the dynamic balance problem of the traditional eccentric crankshaft when rotating at high speed, reduce the vibration and noise caused by the unbalanced mass, and take into account the resistance effect of the lubricating oil:

[0021] 1. Improve dynamic balancing performance

[0022] The utility model achieves a better mass distribution by presetting the cutouts on the eccentric shaft and removing the excess material according to the precise dynamic balance calculation, which significantly improves the dynamic balance performance of the eccentric crankshaft, reduces the vibration generated during high-speed operation, thereby reducing the noise level and improving the stability and reliability of the whole machine.

[0023] 2. Extend equipment life

[0024] Reduced vibration means less impact and wear on mechanical parts, especially for key parts such as bearings and shaft heads, which effectively extends the service life of the equipment. In the long run, it will save users a lot of maintenance and replacement costs.

[0025] 3. Improve operational efficiency

[0026] By optimizing the dynamic balance of the eccentric crankshaft, the energy loss in unnecessary vibration is reduced, so that more energy can be used for effective work, improving the operating efficiency of the warp knitting machine. In addition, the optimized design also takes into account the resistance effect of the lubricating oil, ensuring that the crankshaft moves more smoothly in the lubricating oil, further reducing energy consumption.

[0027] 4. Optimize lubricant usage

[0028] Taking the resistance effect of lubricating oil into consideration and reducing this resistance through design not only makes the crankshaft rotate more smoothly, but also reduces the temperature rise of lubricating oil and improves the lubrication effect. It not only extends the lubricating oil replacement cycle, but also protects mechanical parts and reduces maintenance costs.

[0029] 5. Easy to produce and maintain

[0030] The use of computer-aided design (CAD) and computer-aided manufacturing (CAM) technology not only ensures the accuracy of design and manufacturing, but also simplifies the production process and reduces production costs. At the same time, due to the improvement of dynamic balancing performance, the need for later maintenance and balancing adjustments is reduced, reducing the maintenance cost throughout the product life cycle.

[0031] In summary, the utility model not only solves the problems existing in the traditional design by innovatively optimizing the design and manufacturing process of the eccentric crankshaft, but also provides a series of beneficial effects, including improving dynamic balancing performance, extending equipment service life, improving operating efficiency, optimizing lubricating oil use, facilitating production and maintenance, and improving product competitiveness, thereby bringing substantial benefits to users of warp knitting machines and other related mechanical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the eccentric crankshaft of the utility model.

[0033] The reference numerals in the figure represent:

[0034] 1. Central shaft; 2. Eccentric shaft; 3. Notch; 4. Shaft head. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] See also Figure 1 An eccentric crankshaft for a warp knitting machine that does not require additional counterweights comprises: a plurality of circular shaft bodies 1 and eccentric shaft bodies 2 that are alternately arranged and connected together to form a shaft, the crankshaft having at least one shaft head 4 at one end for installation; a cutout 3 for reducing weight is provided on the eccentric shaft body 2, the cutout 3 is predetermined according to a dynamic balance calculation in the design stage, and material is removed through a machining process to achieve dynamic balance.

[0037] Furthermore, the number and position of the eccentric shafts 2 are designed according to the specific weaving requirements and power transmission requirements of the warp knitting machine.

[0038] Furthermore, the shaft head 4 is designed as a cylindrical joint so as to be connected to a transmission assembly or a drive motor shaft in the warp knitting machine.

[0039] Furthermore, the cutout 3 is determined and machined by computer-aided design and computer-aided manufacturing techniques.

[0040] Furthermore, the cutout 3 is designed to extend along the radial direction of the central shaft body 1 and has a certain depth and width to ensure the stability of the eccentric crankshaft during high-speed rotation.

[0041] Furthermore, the bottom surface of the cutout 3 is in the shape of an outwardly convex arc surface, so as to reduce the resistance of the lubricating oil immersed in the box body during high-speed rotation.

[0042] Furthermore, the cutout 3 on the central shaft body 1 is also subjected to a surface treatment process, including polishing or plating.

[0043] Furthermore, the eccentric crankshaft is made of corrosion-resistant and high-strength materials to adapt to the working conditions of the warp knitting machine under high-speed operation and constantly changing loads.

[0044] A warp knitting machine comprises at least one eccentric crankshaft as mentioned above.

[0045] Dynamic balancing calculations involve ensuring that the mass of the crankshaft is evenly distributed as it rotates, using the following basic formula:

[0046] Unbalanced mass vector: U=m×r;

[0047] Where m is the mass and r is the distance the center of mass is offset from the axis of rotation.

[0048] Mass moment: M=U×ω 2 ;

[0049] where ω is the angular velocity.

[0050] Incision design formula:

[0051] Cut volume: V=π×d×ω×l;

[0052] Where d is the cut depth, ω is the cut width, and l is the cut length.

[0053] Material removal weight: W = V × ρ ;

[0054] in ρ is the material density.

[0055] Material Selection Material High Strength Alloy:

[0056] The strength and toughness can meet the requirements of high-speed rotation.

[0057] It has good corrosion resistance and can adapt to changing working environment.

[0058] Manufacturing process:

[0059] Roughing steps:

[0060] Material cutting: Cut high-strength alloy materials into predetermined sizes.

[0061] Rough turning: Use a lathe for rough turning to form the basic centric shaft and eccentric shaft shapes.

[0062] Finishing and cutting:

[0063] Finish turning: Continue to use the lathe for finish turning to meet the design size and surface roughness requirements.

[0064] Cutting process: according to the calculation formula and CAD / CAM program, the cutting is processed by CNC milling machine.

[0065] Dynamic balancing test process:

[0066] Preheating: Preheat the crankshaft to operating temperature to simulate actual working conditions.

[0067] Installation: Install the crankshaft on the dynamic balancing test machine.

[0068] Test: Turn on the test machine, record the vibration data, and analyze whether it is within the allowable range.

[0069] The eccentric crankshaft prepared by this method was tested in an oil bath environment simulating the working environment of a warp knitting machine, and compared with the existing eccentric crankshaft using an external mass block. The test results are summarized as follows:

[0070]

[0071] The test is carried out in a specially designed closed test container filled with lubricating oil to fully simulate the working environment of a warp knitting machine.

[0072] All tests were conducted using the same brand and type of synthetic lubricant with an oil viscosity of 90 cSt (at the test temperature).

[0073] The test room ambient temperature was controlled at 25°C to ensure the consistency of the test.

[0074] Resistance is applied via an electronic load cell connected to the crankshaft, which is able to accurately measure and apply a constant resistance.

[0075] Dynamic balancing quality measurements are performed under resistance conditions to ensure that the test results reflect the performance under actual working conditions.

[0076] Testing machines and equipment (such as dynamic balancing machines) are calibrated before testing to ensure the accuracy of the data.

[0077] All tests were required to record detailed data and each test was repeated at least three times to confirm the repeatability and accuracy of the results.

[0078] Through the above simulation test tables and prerequisites, we can see that the eccentric crankshaft designed in this scheme shows excellent dynamic balancing performance under strict test conditions, meeting or exceeding the dynamic balancing test standards.

[0079] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An eccentric crankshaft for a warp knitting machine without the need for an additional counterweight, comprising: A plurality of alternatingly arranged central shaft bodies (1) and eccentric shaft bodies (2) connected together to form an axis, the crankshaft having at least one shaft head (4) for installation at one end; characterized in that the eccentric shaft body (2) is provided with a cutout (3) for reducing weight, the cutout (3) is predetermined according to a dynamic balance calculation in the design stage, and material is removed through a machining process to achieve dynamic balance; the number and position of the eccentric shaft bodies (2) are designed according to the specific knitting requirements and power transmission requirements of the warp knitting machine; the shaft head (4) is designed as a cylindrical joint so as to be connected to a transmission component or a drive motor shaft in the warp knitting machine; the cutout (3) is determined and machined through computer-aided design and computer-aided manufacturing technology; the cutout (3) is designed to extend along the radial direction of the central shaft body (1) and has a certain depth and width to ensure the stability of the eccentric crankshaft when rotating at high speed.

2. An eccentric crankshaft for a warp knitting machine without additional counterweight as claimed in claim 1, characterized in that: The bottom surface of the cutout (3) is in the shape of an outwardly convex arc surface, so as to reduce the resistance of the lubricating oil immersed in the box body during high-speed rotation.

3. An eccentric crankshaft for a warp knitting machine without additional counterweight as claimed in claim 2, characterized in that: The cutout (3) on the central shaft (1) is also subjected to a surface treatment process, including polishing or plating.

4. An eccentric crankshaft for a warp knitting machine without additional counterweight as claimed in claim 1, characterized in that: The eccentric crankshaft is made of corrosion-resistant and high-strength material to adapt to the working conditions of the warp knitting machine under high-speed operation and constantly changing loads.

5. A warp knitting machine, characterized in that: include: At least one eccentric crankshaft as claimed in claim 1.

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