Mechanical gripper without return of the thread

Abstract

The present application relates to the technical field of thread clippers, and discloses a mechanical thread clipper without thread falling, which comprises an upper shell and a lower shell, has a spacing between the upper shell and the lower shell, is connected through two connecting plates between the upper shell and the lower shell, and is provided with a compression assembly inside the upper shell and the lower shell, and is provided with a guide assembly on the lower shell.In the present application, when the thread clipper needs to be lubricated, the lower pull guide sleeve exposes the lifting seat between the upper shell and the lower shell, so that the lubrication operation can be performed without disassembling the shell, the maintenance process is simplified, the first fixed rod and the second fixed rod are provided with the first sealing ring, the first fixed rod and the second fixed rod extend into the annular sealing groove corresponding to the second sealing ring to form a zigzag sealing path, the dust and the fiber flocculation in the outside are blocked from entering the inside of the shell, the impurities are prevented from adhering to the lubricating oil on the surface of the lifting seat, the oil sludge is prevented from being formed to cause the movement to be stuck, the smooth movement is ensured, the sealing effect is maintained, and the present application is suitable for the textile workshop environment with much dust.

Description

Technical Field

[0001] This invention relates to the field of yarn clamping technology, and in particular to a mechanical yarn clamping device that prevents yarn from falling back. Background Technology

[0002] Yarn clamps are key components used in textile processing to hold, fix, or guide the movement of yarns, ensuring stable yarn tension and smooth passage through the process.

[0003] During use, the internal parts of the yarn clamp require regular lubrication. The yarn clamp repeatedly performs clamping and releasing actions at an extremely high frequency during loom operation. Whether it's the pushing action between the cam and the top column, the opening and closing contact between the movable and fixed clamping blocks, the sliding contact between the movable shaft and the yarn clamp seat, the axial movement between the sliding sleeve and the fastening screw sleeve, or the reciprocating motion between the sliding needle and the inner wall of the sliding sleeve, all are typical friction pairs. At a frequency of hundreds or even thousands of times per minute, without lubrication, the dry friction between the metal surfaces will quickly lead to wear, scratches, or even seizing of the contact surfaces, increasing the clearance and reducing the accuracy of the action. In existing technology, the outer shell of the yarn clamp needs to be manually removed, grease applied to the internal parts, and the outer shell reassembled. This overall operation is inconvenient, time-consuming, and labor-intensive.

[0004] Therefore, it is necessary to design a mechanical yarn clamp that prevents yarn slippage and solves the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mechanical yarn clamping device that eliminates yarn backflow.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A mechanical yarn clamping device for non-rebound yarn doffing includes an upper housing and a lower housing, with a gap between the upper housing and the lower housing. The upper housing and the lower housing are connected by two connecting plates. A pressing assembly is provided inside both the upper housing and the lower housing, and a guiding assembly is provided on the lower housing.

[0007] As a preferred embodiment of the present invention, the pressing assembly includes a lifting seat, the outer peripheral surface of which is fixed with a plurality of teeth, a first fixing rod fixed on the top surface of the lifting seat, a pressure block fixed at the end of the first fixing rod away from the lifting seat, the pressing assembly further includes a fixing block, the fixing block is fixed inside the upper housing and is positioned directly opposite the pressure block, a second fixing rod is fixed on the bottom surface of the lifting seat, the end of the second fixing rod away from the lifting seat extends into the interior of the lower housing, and the second fixing rod is connected to the lower housing by a spring.

[0008] As a preferred embodiment of the present invention, the guide assembly includes a guide sleeve, which is slidably disposed on the lower housing. The guide sleeve has a plurality of guide grooves, which correspond to a plurality of teeth respectively. A plurality of teeth on the lifting seat slide in the plurality of guide grooves respectively. A limiting lip is fixed at the top of the guide sleeve.

[0009] As a preferred embodiment of the present invention, in the initial state, the top end of the guide sleeve is attached to the bottom end of the upper housing, and the guide sleeve is set directly opposite the distance between the upper housing and the lower housing.

[0010] As a preferred embodiment of the present invention, the outer surface of the guide sleeve is fitted with the inner surface of the lower housing.

[0011] In a preferred embodiment of the present invention, the guide sleeve and the lower housing are connected by two bolts.

[0012] As a preferred embodiment of the present invention, a first mounting ring is fixedly sleeved on both the first fixing rod and the second fixing rod, and a first sealing ring is fixedly sleeved on both of the first mounting rings. A second mounting ring is fixed inside both the upper housing and the lower housing, and a second sealing ring is fixed to the inner ring of each of the two second mounting rings. An annular sealing groove is formed in the inner ring of each of the two second sealing rings, and the two first sealing rings extend into the two annular sealing grooves respectively.

[0013] As a preferred embodiment of the present invention, the outer surface of the first sealing ring is in contact with the groove wall of the annular sealing groove.

[0014] The present invention has the following beneficial effects: In this invention, when the yarn clamp needs to be lubricated, the guide sleeve is pulled down to expose the lifting seat between the upper and lower housings. Lubrication can be performed without disassembling the outer shell, simplifying the maintenance process. The first and second fixed rods are equipped with first sealing rings that extend into the annular sealing grooves of the corresponding second sealing rings to form a tortuous sealing path. This prevents external dust and fibrous material from entering the housing and avoids impurities adhering to the lubricating oil on the surface of the lifting seat, thus preventing sludge formation that could cause movement jamming. The sealing rings undergo elastic deformation when the fixed rods move but do not detach from the sealing grooves, ensuring smooth movement while maintaining a sealing effect. This invention is suitable for dusty textile workshop environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a mechanical yarn clamping device that eliminates yarn retraction according to the present invention. Figure 2 This is a structural diagram of the upper shell, lower shell, and two connecting plates; Figure 3 This is a schematic cross-sectional view of the upper and lower shell structures. Figure 4 This is a schematic diagram of the structure when the lifting seat is exposed; Figure 5 This is a cross-sectional three-dimensional structural diagram of the upper and lower shells; Figure 6 This is a structural diagram of the lifting seat, the first fixing rod, and the second fixing rod. Figure 7 This is a schematic diagram of the guide component. Figure 8 This is a schematic diagram of the structure of the second mounting ring and the second sealing ring; Figure 9 for Figure 5 Enlarged view of the structure at point A.

[0016] In the diagram: 1. Upper housing; 2. Lower housing; 3. Connecting plate; 41. Lifting seat; 42. First fixing rod; 43. Pressure block; 44. Fixing block; 45. Second fixing rod; 46. Spring; 51. Guide sleeve; 52. Guide groove; 53. Limiting lip; 61. First mounting ring; 62. First sealing ring; 63. Second mounting ring; 64. Second sealing ring; 65. Annular sealing groove. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Example 1: This example describes a mechanical yarn clamping device that eliminates yarn retraction during doffing. Refer to... Figure 1-7 The device includes an upper housing 1 and a lower housing 2, with a gap between them. The upper housing 1 and lower housing 2 are connected by two connecting plates 3, which are typically made of metal plates and fixed to the upper housing 1 and lower housing 2 respectively by bolts or welding, ensuring the rigidity and stability of the overall structure. A clamping assembly is commonly installed inside both the upper housing 1 and lower housing 2. This clamping assembly is the core functional component of the yarn clamp, used to apply or release clamping force to the yarn. The clamping assembly includes a lifting seat 41, whose outer circumferential surface is fixed with several teeth. The lifting seat 41 is evenly distributed around its circumference. A first fixing rod 42 is fixed on the top surface of the lifting seat 41. The first fixing rod 42 extends vertically. A pressure block 43 is fixed at the end of the first fixing rod 42 away from the lifting seat 41. The pressure block 43 is positioned opposite the fixing block 44. The pressing assembly also includes a fixing block 44. The fixing block 44 is fixed inside the upper housing 1 and is positioned opposite the pressure block 43. The fixing block 44 is usually made of wear-resistant metal material. Fine textures can be processed on the side facing the pressure block 43 to increase the friction between it and the yarn and prevent the yarn from slipping.

[0019] A second fixing rod 45 is fixed to the bottom surface of the lifting seat 41. One end of the second fixing rod 45, away from the lifting seat 41, extends into the interior of the lower housing 2. The second fixing rod 45 and the lower housing 2 are connected by a spring 46. The spring 46 is used for the automatic reset of the pressure block 43. The spring 46 is typically a cylindrical helical compression spring 46, sleeved on the second fixing rod 45. One end of the spring abuts against the inner bottom surface of the lower housing 2, and the other end abuts against the second fixing rod 45. When it is necessary to clamp the yarn, power is applied to the lifting seat 41, causing the lifting seat 41 to move upward. The power can be provided by an external cylinder, electromagnet, or cam mechanism, which can be flexibly selected according to the overall design of the textile equipment. This is existing technology. Without going into too much detail, when the lifting seat 41 moves upward, it can drive the pressure block 43 to move upward through the first fixing rod 42, so that the pressure block 43 is close to the fixing block 44. The yarn passes through the gap between the pressure block 43 and the fixing block 44. When the pressure block 43 moves upward, it can press the yarn tightly onto the fixing block 44, thereby fixing the yarn. At this time, the yarn is firmly clamped between the pressure block 43 and the fixing block 44 and will not slip. When it is necessary to release the yarn, the power applied to the lifting seat 41 is removed. At this time, the lifting seat 41 is reset under the action of the spring 46, so that the pressure block 43 is reset as well. When the pressure block 43 is reset, it will move away from the fixing block 44, thereby releasing the yarn.

[0020] A guide assembly is provided on the lower housing 2. The guide assembly is used to guide the lifting seat 41. During the up and down movement of the lifting seat 41, good guidance is the key to ensuring accurate clamping position and smooth movement. The guide assembly includes a guide sleeve 51, which is slidably mounted on the lower housing 2. The guide sleeve 51 is cylindrical, and its inner diameter is adapted to the outer diameter of the lifting seat 41. Several guide grooves 52 are formed on the guide sleeve 51, and the several guide grooves 52 correspond to several teeth. The guide grooves 52 extend along the axial direction of the guide sleeve 51, and their width matches the width of the teeth. Several teeth on the lifting seat 41 slide in several guide grooves 52. The teeth and guide grooves 52 are designed to... The guide sleeve 51 provides guidance for the lifting seat 41, preventing it from shaking during lifting and ensuring its stability during movement. Simultaneously, the engagement of the teeth with the guide groove 52 prevents the lifting seat 41 from rotating, ensuring that the pressure block 43 and the fixing block 44 always maintain the correct alignment. A limiting lip 53 is fixed to the top of the guide sleeve 51, extending radially outwards from the top of the guide sleeve 51. Its outer diameter is larger than the inner diameter of the lower housing 2. The limiting lip 53 provides a limit for the guide sleeve 51, preventing it from completely retracting into the lower housing 2, ensuring that a portion of the guide sleeve 51 is always located within the gap between the upper housing 1 and the lower housing 2.

[0021] In the initial state, such as Figure 2As shown, the top end of the guide sleeve 51 is fitted against the bottom end of the upper housing 1. At this time, the guide sleeve 51 is exactly located in the gap between the upper housing 1 and the lower housing 2. In this state, the lifting seat 41 is completely wrapped by the guide sleeve 51, and the lubricating oil on its surface is not easily volatilized or contaminated by the outside. When the lifting seat 41 needs to be lubricated, the operator can pull down the guide sleeve 51 to move it downward until the limiting lip 53 is fitted against the top end of the lower housing 2. At this time, the guide sleeve 51 is withdrawn from the gap between the upper housing 1 and the lower housing 2, exposing the lifting seat 41. In this case, the guide sleeve 51 will be misaligned with the lifting seat 41, so that the lifting seat 41 is exposed in the gap between the upper housing 1 and the lower housing 2, forming as shown in the figure. Figure 4 As shown in the diagram, the operator can apply lubricating oil or grease to the surface of the lifting seat 41. Since the outer periphery of the lifting seat 41 is exposed, the operator can easily complete the lubrication operation without disassembling any outer shell parts, which greatly saves maintenance time.

[0022] This operation replaces the traditional yarn clamp structure, allowing for convenient lubrication of the yarn clamp without disassembling the outer casing. Traditional yarn clamps often require disassembling the entire outer casing for lubrication, which is not only cumbersome but also prone to damaging internal parts during disassembly and assembly. It should be noted that the guide sleeve 51 and the lower housing 2 can be connected by bolts for easy disassembly and fixing. When the guide sleeve 51 is pulled down to its position, it can be temporarily fixed to the lower housing 2 by bolts, keeping the lifting seat 41 exposed for easy lubrication by hand. After lubrication, loosen the bolts and push the guide sleeve 51 back to its original position to restore the guiding function.

[0023] Example 2: Based on Example 1, this example discloses a mechanical yarn clamping device that eliminates yarn retraction during doffing, referring to... Figure 8-9 Both the first fixing rod 42 and the second fixing rod 45 are fixedly fitted with first mounting rings 61. Both first mounting rings 61 are annular and are fixed to the outer circumference of the first fixing rod 42 and the second fixing rod 45 respectively by interference fit or set screws. Each first mounting ring 61 is fixedly fitted with a first sealing ring 62. Second mounting rings 63 are fixed inside both the upper housing 1 and the lower housing 2. The second mounting rings 63 are fixed to the inner walls of the upper housing 1 and the lower housing 2 by thread or press fitting. The inner rings of both second mounting rings 63 are fixed with second sealing rings 64, and the inner rings of both second sealing rings 64 have annular sealing grooves 65. Figure 9As shown, the two first sealing rings 62 extend into the two annular sealing grooves 65 respectively. The arrangement of the first sealing rings 62 and the second sealing rings 64 can provide a sealing effect between the first fixed rod 42 and the upper housing 1, and at the same time provide a sealing effect between the second fixed rod 45 and the lower housing 2. This double sealing structure effectively prevents dust, fibrous material and short fibers from the external environment from entering the yarn clamp through the gap between the fixed rod and the housing. Under the sealing effect of the two first sealing rings 62 and the second sealing rings 64, dust and thread ends from the external environment cannot adhere to the lubricating oil or grease on the surface of the lifting seat 41. This ensures the cleanliness of the lubricating oil, extends the lubrication cycle, and avoids the formation of sludge after dust and lubricating oil mix, which would cause the lifting seat 41 to jam.

[0024] The outer surface of the first sealing ring 62 fits against the groove wall of the annular sealing groove 65, and the contact surface between them forms a tortuous sealing path. Even if tiny dust particles attempt to enter, they will be blocked outside the annular sealing groove 65. It should also be noted that both the first sealing ring 62 and the second sealing ring 64 are annular structures, ensuring smooth up-and-down movement of the lifting seat 41, the first fixing rod 42, and the second fixing rod 45. The first sealing ring 62 and the second sealing ring 64 are made of elastic rubber material, which can produce slight elastic deformation to adapt to changes in position when the fixing rod moves. During the up-and-down movement, the first sealing ring 62 and the second sealing ring 64 will deform, but the first sealing ring 62 will not detach from the annular sealing groove 65, ensuring the sealing effect. This is because the outer edge of the first sealing ring 62 is wrapped by the annular sealing groove 65 of the second sealing ring 64. Even if it is subjected to radial or axial forces during the movement, the first sealing ring 62 is still constrained in the sealing groove and will not come out or flip. This sealing structure ensures the flexibility of movement while achieving reliable dust and pollution prevention functions. It is particularly suitable for working environments with a lot of dust and fibers, such as textile workshops, and significantly improves the service life and reliability of the yarn clamp.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mechanical yarn clamping device that eliminates yarn backflow, characterized in that, It includes an upper shell (1) and a lower shell (2), with a gap between the upper shell (1) and the lower shell (2), and the upper shell (1) and the lower shell (2) are connected by two connecting plates (3). The upper shell (1) and the lower shell (2) are both provided with a pressing assembly inside, and the lower shell (2) is provided with a guiding assembly. The pressing assembly includes a lifting seat (41), the outer peripheral surface of the lifting seat (41) is fixed with a number of teeth, the top surface of the lifting seat (41) is fixed with a first fixing rod (42), the end of the first fixing rod (42) away from the lifting seat (41) is fixed with a pressure block (43), the pressing assembly also includes a fixing block (44), the fixing block (44) is fixed inside the upper housing (1), and the fixing block (44) is set opposite to the pressure block (43), the bottom surface of the lifting seat (41) is fixed with a second fixing rod (45), the end of the second fixing rod (45) away from the lifting seat (41) extends into the interior of the lower housing (2), and the second fixing rod (45) and the lower housing (2) are connected by a spring (46); The guide assembly includes a guide sleeve (51), which is slidably disposed on the lower housing (2). The guide sleeve (51) has several guide grooves (52), which correspond to several teeth respectively. Several teeth on the lifting seat (41) slide in several guide grooves (52). The top end of the guide sleeve (51) is fixed with a limiting lip (53). In the initial state, the top end of the guide sleeve (51) is attached to the bottom end of the upper housing (1), and the guide sleeve (51) is set to the distance between the upper housing (1) and the lower housing (2).

2. The mechanical yarn clamping device with no yarn backing as described in claim 1, characterized in that, The outer surface of the guide sleeve (51) is in contact with the inner surface of the lower housing (2).

3. The mechanical yarn clamping device for non-rebound yarn doffing according to claim 2, characterized in that, The guide sleeve (51) is connected to the lower housing (2) by two bolts.

4. A mechanical yarn clamping device for non-rebound yarn doffing according to claim 3, characterized in that, A first mounting ring (61) is fixedly sleeved on both the first fixing rod (42) and the second fixing rod (45). A first sealing ring (62) is fixedly sleeved on both of the first mounting rings (61). A second mounting ring (63) is fixed inside both the upper housing (1) and the lower housing (2). A second sealing ring (64) is fixed on the inner ring of both of the second mounting rings (63). An annular sealing groove (65) is opened on the inner ring of both of the second sealing rings (64). The two first sealing rings (62) extend into the two annular sealing grooves (65) respectively.

5. A mechanical yarn clamping device for non-rebound yarn doffing according to claim 4, characterized in that, The outer surface of the first sealing ring (62) is in contact with the groove wall of the annular sealing groove (65).

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