A spinning machine cradle and a method for fine-tuning pressure

Abstract

The present invention discloses a cradle of a spinning machine, comprising a handle, a rocker arm and a cradle seat. The cradle seat is provided with a pressure fine-tuning component; the pressure fine-tuning component comprises a limit assembly and a pressure regulating assembly; the limit assembly comprises at least one limit portion, and the limit portion is fixedly connected to the cradle support rod shaft; the limit assembly is used to fix the cradle seat to prevent unwanted movement relative to the support rod shaft; the pressure regulating assembly is fixed in the cradle seat, and can make the cradle seat move appropriately relative to the limit assembly, and the pressure can be adjusted by operation behind or below the cradle. The present invention also provides a method for fine-tuning the pressure from behind / below the cradle. The cradle of the present invention is easy to install and operate, has a simple structure, can reliably adjust the pressure value within a wide range, and takes into account the fixity of the cradle.

Description

Technical Field

[0001] The invention relates to the field of spinning machinery and equipment, and in particular to a drafting and pressurizing device of a spinning machine, in particular to a cradle, a cradle seat and a pressure regulating device thereof. Background Art

[0002] The modern drafting and pressurizing mechanism used for spinning is commonly known as a cradle. The structure of a conventional cradle mainly includes: a rocker arm, a cradle seat and a handle movably connected to the rocker arm; a leather roller claw is provided on the lower side of the rocker arm. The stability and consistency of the cradle pressurizing directly affect the quality of spinning. Therefore, pressure adjustment is a necessary operation when using the cradle.

[0003] In the prior art, the cradle usually adopts a connecting rod locking mechanism composed of a rocker arm, a handle, and a cradle seat, and the pressure change is achieved by adjusting the pressure transmission crank of the cradle seat to unlock and lock the rocker arm. One of the more optimized methods is to set an eccentric component in the pressure transmission crank to adjust the locking offset, and to achieve pressure regulation of the entire cradle by rotating the eccentric component to fine-tune the position of the pressure transmission crank rotating around its fulcrum. The main feature of this pressure regulation method is that the pressure is adjusted from the left and right sides of the cradle or the cradle seat, while the cradle seat is always stationary. In the actual application process, it is found that for the cradle with a connecting rod locking mechanism using an eccentric component, no matter whether the eccentric wheel is continuously adjusted or the eccentric block is multi-stage adjusted, and no matter where the eccentric component is specifically set, the maximum and minimum pressure ranges mainly depend on the eccentric distance of the eccentric component. Based on the mechanical structure limitation of the entire cradle, the pressure value can be adjusted in a narrow range, which sometimes cannot fully meet the production needs of the enterprise.

[0004] Another prior art considers not adjusting from the left and right sides of the cradle, but designs a pressure regulating structure that can perform pressure fine-tuning operations from the top of the cradle. In this solution, on the basis of keeping the cradle seat stationary, a pressure fine-tuning component such as an additional screw, nut or similar fixing and force transmission structure is set on the upper part of the handle; the handle is movably connected to the rocker arm, and there is also a pin fixed in the center position on the cradle seat as the fulcrum of the pressure transmission crank. The pressure applied by the pressure transmission crank on the pin is changed by the pressure fine-tuning device, thereby achieving the effect of pressure fine-tuning. The main feature of this pressure regulation method is that the pressure is adjusted from the top of the cradle. Since this method directly adjusts the pressure from the top, it is more convenient to adjust, and it has been widely used in actual production.

[0005] At present, there is a common view among the existing technicians in this field based on actual production conditions and industry experience: after the cradle is fixedly installed, since the lower end of the pressure transmission crank of the cradle seat obtains the pressure source from the airbag and the upper end transmits the pressure to the rocker arm, the cradle seat can only be used to fix the cradle and the position cannot be moved. At present, the technicians mainly set a fine-tuning device on the handle to adjust the pressure from the top or set the fulcrum of the pressure transmission crank to an eccentric component to adjust the pressure from the side; there is no technical solution to use the appropriate micro-movement of the cradle seat to adjust the pressure. It is precisely because of this that the above two technical solutions both emphasize that the cradle seat must be fixed and motionless.

[0006] In the existing spinning machinery, the support rod shaft supporting the cradle is a hollow rod, and there are two main types according to the cross-sectional shape: one is a round tube support rod shaft; the other is a polygonal support rod shaft, and the most common one is a regular hexagonal support rod shaft. The general operation is to install the cradle support rod shaft on the cradle support rod shaft seat of the spinning machine and tighten the cradle support rod shaft screw. According to the relevant technical parameters of the cradle, the cradle support rod shaft gauge is used to correct the spacing from the front lower roller to the cradle support rod shaft to meet the standard, and the cradle support rod shaft seat screw is tightened, and the cradle support rod shaft is always fixed. When a round tube cradle support rod shaft is used in the prior art, a boss on the cradle seat is used to position the cradle seat and the support rod shaft, and the cradle seat is fixed on the support rod shaft as much as possible without moving. When the cradle support rod shaft is a polygon such as a hexagonal support rod shaft, the cradle seat uses a hexagonal hole in the half form to lock the cradle seat on the cradle support rod shaft, thereby ensuring that the cradle seat is fixed on the support rod shaft and does not move.

[0007] In order to be more conducive to actual production, improve efficiency, and help upgrade and transform existing production equipment such as cradles, a new type of pressure fine-tuning cradle, cradle seat and pressure fine-tuning method are provided to break through the view of technicians in the prior art on the limitation of pressure adjustment position. The pressure fine-tuning operation can be performed at the rear or bottom of the cradle and a wider pressure adjustment range can be achieved while taking into account the fixity and stability of the cradle. Summary of the invention

[0008] The purpose of the present invention is to overcome the view of existing technicians on the position limitation of the pressure fine-tuning device on the basis of the existing technology, and to provide a spinning machine cradle with reasonable design and configuration, reliable performance, good stability and flexible pressure value adjustment range setting.

[0009] The side view of the cradle of the present invention is shown in the attached figure. Figure 3 As shown, the front and rear positions described herein are indicated by X in the figure, and the arrow direction is from front to back; the upper and lower parts are indicated by Y in the figure, and the arrow direction indicates from the upper part to the lower part of the cradle. The present invention mainly provides a cradle for a spinning machine, and a pressure fine-tuning component is arranged at the rear or lower part of the cradle seat, so that the cradle seat can not only be used to fix the cradle, but also can realize the pressure fine-tuning operation of the cradle from the rear or lower direction of the cradle.

[0010] A spinning machine cradle of the present invention comprises a handle, a rocker arm, and a cradle seat. The cradle seat comprises a pressure transmission crank, an upper fixing card, and a lower fixing card; the upper fixing card and the lower fixing card are closed to form a circular space, and the circular space matches the round tube cradle support rod shaft, so that the cradle seat can be installed on the cradle support rod shaft, and the lower end of the pressure transmission crank abuts against the air bag hole reserved in the round tube cradle support rod shaft. It is characterized in that the cradle seat is provided with a pressure fine-tuning component, and the pressure fine-tuning component comprises a limit assembly and a pressure regulating assembly. The pressure fine-tuning component is adjusted so that the cradle seat can be appropriately rotated around the axis of the support rod shaft, so that the pressure regulating assembly can be operated from the rear or lower direction of the cradle to perform pressure fine-tuning.

[0011] The limit assembly includes at least one limit portion, which is fixedly connected to the circumferential outer surface of the cradle support rod shaft side, and the specific position can be determined according to the actual design; the limit assembly is used to fix the cradle seat to prevent the cradle seat from making unnecessary movement relative to the cradle support rod shaft; and cooperates with the pressure regulating assembly to fine-tune the pressure, that is, to adjust the pressure regulating assembly to ensure that the force acting on the limit assembly can push the cradle seat to make a corresponding displacement.

[0012] The pressure regulating assembly includes at least one regulating part and at least one assembling part, wherein the assembling part fixes the pressure regulating assembly to the cradle seat, and the regulating part is arranged on the assembling part and contacts the limiting assembly; changing the acting force between the regulating part and the limiting assembly can realize the appropriate movement of the cradle seat relative to the limiting assembly.

[0013] Specifically, the limiting part of the limiting assembly is matched with a bolt and a circular nut to achieve fixed connection with the circular opening on the surface of the support rod shaft of the round tube cradle.

[0014] In a preferred embodiment, the limiting assembly includes two limiting parts. The limiting parts can limit the relative displacement of the cradle seat in two opposite directions around the circumference of the support rod axis, thereby more effectively controlling the change of the pressure value during and after the pressure fine-tuning process.

[0015] In another advantageous embodiment, the pressure regulating assembly includes two regulating parts; changing the acting force between the regulating parts and the limit assembly respectively can make the cradle seat move appropriately in two corresponding opposite directions relative to the limit assembly. When fine-tuning the pressure in this way, the two regulating parts are operated respectively, one for controlling the pressure increase and the other for controlling the pressure release. The process of increasing and decreasing the pressure value is easier to control, which is conducive to improving the accuracy and reliability of the pressure value adjustment.

[0016] Preferably, the contact surface between the adjusting part and the limit assembly is an arc surface, so that the relative displacement process between the two is smoother, and after long-term use, the contact surface is not easily deformed to affect the accuracy of pressure regulation.

[0017] In another effective implementation, a limiting slot is provided in the limiting assembly, and the adjusting part moves in the limiting slot during adjustment. In this solution, the movement of the pressure regulating assembly relative to the limiting assembly is bidirectional, so as to better achieve pressure increase and pressure release; at the same time, the pressure regulating assembly has a larger range of position change for the limiting assembly, so that the adjustment range of the pressure value is wider; the pressure value change process generated by fine-tuning the pressure regulating assembly can be continuous or step-by-step, which is more convenient and controllable.

[0018] In order to ensure that the movement direction of the pressure regulating assembly relative to the limiting assembly is always consistent with the tangent direction of the circumferential surface of the cradle support rod shaft, and also to help maintain the good rigidity of the pressure fine-tuning component after long-term operation, in a particularly advantageous embodiment, two opposite side walls in the cradle seat are arranged with arc grooves, and the pressure regulating assembly is limited to sliding along the arc groove, and the movement direction of the pressure regulating assembly during the pressure fine-tuning process remains tangent to the circumferential direction of the cradle support rod shaft.

[0019] In another feasible embodiment, the limit assembly further includes a cushion block; the gripping surface of the cradle seat in contact with the support rod shaft has an arc-shaped notch, and the cushion block is arranged in the arc-shaped notch and enables the cradle seat to move in an arc direction. Furthermore, the bearing surface of the cushion block in contact with the cradle support rod shaft matches the outer surface of the cradle support rod shaft, and the curvature of the outer arc surface of the cushion block matches the arc-shaped notch of the cradle seat, so that the cradle seat can move relative to the cushion block or the circular support rod shaft during adjustment. The contact area between the limit assembly including the cushion block and the cradle support rod shaft is larger, and the connection and force transmission between the two are smoother.

[0020] The present invention provides a spinning machine cradle pressure regulating device adopting a polygonal cradle support rod shaft, wherein a holding circular tube is fixedly sleeved on the outside of the polygonal support rod shaft; the holding circular tube is pre-set with an opening matching the polygonal support rod shaft; by using the spinning machine cradle described in the present invention, the circular hole formed by the upper and lower fixed card closing of the cradle seat is adapted to the holding circular tube, and pressure fine-tuning can be achieved from the rear or lower part of the cradle by fine-tuning the pressure component.

[0021] The present invention also provides a method for fine-tuning the pressure of a spinning machine cradle. Using the spinning machine cradle described in the present invention, the first step is to measure the first pressure value of the cradle to obtain the difference between the pressure value and the target value; the second step is to adjust the pressure fine-tuning component from the rear or bottom of the cradle according to the difference obtained in the first step, and test the adjusted second pressure value; the third step is to determine whether the second pressure value is within the range to be adjusted. If it is within the range to be adjusted, the adjustment is completed; if adjustment is still required, repeat the second step.

[0022] The above-mentioned method of fine-tuning the pressure at the rear or lower part of the cradle using the pressure fine-tuning component may also include: before adjustment or before the above-mentioned first step, appropriately loosening the opening gaps of the upper and lower fixing cards; after the adjustment is completed, tightening the opening gaps of the upper and lower fixing cards to completely lock the cradle seat.

[0023] When the cradle support rod shaft is a polygonal support rod shaft, the fine-tuning pressure method also includes: when installing the cradle seat, firstly putting the holding circular tube onto the polygonal support rod shaft, and the inner wall circumference of the holding circular tube forms a fixed connection with the contact part of the polygonal cradle support rod shaft; or replacing the polygonal cradle support rod shaft with a circular tube cradle support rod shaft.

[0024] In summary, the spinning machine cradle of the present invention breaks through the limitations of the pressure regulating device design and pressure fine-tuning method in the prior art, realizes pressure fine-tuning from the rear or lower part of the cradle by changing the position of the cradle seat, can achieve a wide range of pressure value adjustment, and can firmly position the cradle seat on the cradle support rod shaft when the adjustment is completed. The beneficial effects achieved are simple structure, flexible cradle installation and adjustment, convenient operation, and meeting the actual required range of pressure value adjustment and the fixity of the cradle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the cradle of the present invention.

[0026] Figure 2 It is a schematic diagram of the cradle seat and its pressure fine-adjusting component in the first embodiment.

[0027] Figure 3 It is a schematic diagram of the force of the cradle fine-tuning pressure and the cradle orientation of the present invention; Figure 4 It is a schematic diagram of a method process for fine-tuning pressure using the cradle of the present invention;

[0028] Figure 5 is a schematic diagram of the connection between the limit assembly and the cradle seat in the second embodiment; Figure 6 is a schematic diagram of the voltage regulating assembly in Example 3;

[0029] Figure 7 is a schematic diagram of a voltage regulating assembly and a limiting assembly in Embodiment 4;

[0030] Figure 8 is a schematic diagram of the connection between the limit assembly and the cradle seat in the fifth embodiment; Fig. 9 is a schematic diagram of the limit assembly in the sixth embodiment;

[0031] Fig.10 is a schematic diagram of a cradle support rod axis in Embodiment 7 that is a regular polygonal support rod axis;

[0032] Fig.11a , 11b 11c and 11d are schematic diagrams of the structure of the coordination between the limit assembly and the voltage regulating assembly in the three specific embodiments eight, nine and ten respectively.

[0033] The reference numerals in the figure are:

[0034] 1-handle; 2-rocker arm; 21-front leather roller claw; 22-middle leather roller claw; 23-rear leather roller claw; 3-cradle seat;

[0035] 31-upper fixing card; 32-lower fixing card; 311-locking nut; 321-slot; 322-locking bolt; 4-cradle support rod shaft; 5-connecting joint; 6-holding round tube; 7-connecting shaft; 8-pin shaft; 9-limiting assembly; 91-positioning bolt; 92-positioning nut; 93-limiting part; 94-threaded through hole; 95-pad; 95A-supporting surface; 95B-outer arc surface; 10-pressure regulating assembly; 100-adjusting part; 101-assembly part; 102-arc slide groove; 11-pressure transmission crank; F-force; D-transmission of force; X-front and rear direction of cradle; Y-up and down direction of cradle; M-moving direction of cradle seat. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0037] Please refer to Figure 1 and Figure 3 The overall structure of the cradle of the present invention is shown in the figure. The spinning machine cradle includes a handle 1, a rocker arm 2, and a cradle seat 3; the cradle is installed on a cradle support rod shaft 4 (taking a circular shape as an example). The rocker arm 2 and the cradle seat 3 are movably connected through a connecting joint 5. The front leather roller claw 21, the middle leather roller claw 22 and the rear leather roller claw 23 are arranged at the lower part of the rocker arm 2. The handle 1 and the rocker arm 2 are also movably connected. The pin 8 is arranged at the lower end of the movable connection point between the handle 1 and the rocker arm 2, and is against the pressure transmission crank 11.

[0038] In the first specific embodiment, Figure 2As shown, the cradle seat 3 includes an upper fixing card 31 and a lower fixing card 32. The upper fixing card 31 and the lower fixing card 32 are movably connected through a connecting shaft 7 to achieve opening and closing; the upper fixing card 31 and the lower fixing card 32 close the cradle support rod shaft 4 to form a gripping contact surface shape that matches the surface shape of the cradle support rod shaft. In this embodiment, the cradle support rod shaft 4 is a round tube, and the upper and lower fixing cards are closed by a locking nut 311 and a locking bolt 322. By adjusting the locking bolt 322 on the lower side of the lower fixing card 32, the closing gap of the upper and lower fixing cards can be adjusted to change the tightness of the gripping support rod shaft. The lower end of the pressure transmission crank 11 is inserted into the opening of the cradle support rod shaft 4 for the airbag in the support rod shaft to transmit pressure. In this embodiment, the pressure regulating assembly 10 in the pressure fine-tuning component includes an adjusting portion 100 and an assembly portion 101. The adjusting part 100 uses an adjusting bolt, such as a hexagon socket bolt; the assembling part 101 uses a square nut, and the side of the square nut is fixedly installed with the two side walls of the lower fixing card 32, such as by welding. The adjusting bolt of the adjusting part 100 cooperates with the square nut of the assembling part 101, and the adjusting bolt passes through the screw hole of the square nut. In this embodiment, the limiting assembly 9 includes a limiting part 93, which is a square steel block welded to the surface of a round tube of a cradle support rod shaft 4. The position of this square steel block is not limited to the position shown in the figure. Figure 2 The square steel block can be fixedly connected to the circumference of the round tube surface of the cradle support rod shaft 4. The head of the adjusting bolt of the adjusting part 100 contacts the side of the square steel block of the limiting part 93. The adjusting part 100 is fine-tuned, that is, the adjusting bolt is rotated to screw in or out of the threaded hole of the square nut of the assembly part 101. At this time, the thrust acting on the side of the limiting part 93 will increase or decrease accordingly. The limiting component 9 is fixed to the cradle support rod shaft 4 and cannot move, and the pressure regulating component 10 is fixed to the cradle seat 3. When the force F of the limiting component 9 on the pressure regulating component 10 increases or decreases accordingly, the cradle seat 3 will move clockwise or counterclockwise in the M direction accordingly.

[0039] Combination Figure 3 and 4 The specific process of fine-tuning the cradle pressure is shown in the figure. According to the lever principle, the relative displacement of the cradle seat 3 as a whole relative to the limit assembly 9 causes the force F transmitted to the lower end of the pressure transmitting crank 11 to change accordingly, and the pressure F acting on the pin 8 at the upper end of the pressure transmitting crank 11 changes. The pressure F change is transmitted to each leather roller claw through the rocker arm 2, thereby realizing the pressure adjustment of the cradle.

[0040] In the second specific embodiment, refer to Figure 5, the main difference from the first embodiment lies in the fixed connection method of the limit assembly 9 and the cradle support rod shaft 4. In this embodiment, the cradle support rod shaft is a round tube cradle support rod shaft, and a circular hole is also opened at the position where the center of the cross section of the cradle support rod shaft 4 through which the central axis of the pressure transmission crank 11 is inserted into the opening intersects with the surface of the cradle support rod shaft 4 (the position of the circular hole can also be modified accordingly according to actual conditions), and a positioning nut 92 is arranged in this circular hole, and the size of the positioning nut 92 matches this circular hole; the limit assembly 9 is composed of a positioning bolt 91 passing through a limiting portion 93 and cooperating with a positioning nut 92, and the limiting portion 93 in this embodiment is a square steel block. The positioning bolt 91 is a hexagon socket bolt, which passes through the limiting portion 93 and cooperates with the positioning nut 92 to achieve a fixed connection between the limit assembly 9 and the cradle support rod shaft 4.

[0041] In specific embodiment 3, Figure 6 As shown, the only difference from the first embodiment is that the pressure regulating assembly 10 includes two adjusting parts 100 and two assembly parts 101. The assembly parts 101 are respectively fixed inside the lower fixing card 32 and on both sides of the limiting part 93 in the M direction. The heads of the adjusting bolts of the two adjusting parts 100 are in contact with the two side surfaces of the square steel block of the limiting part 93 in the M direction respectively. The two adjusting parts 100 cooperate to fine-tune the resultant force acting on the limiting part 93 in the M direction, that is, the force F of the limiting assembly 9 on the pressure regulating assembly 10. In this embodiment, the corresponding clockwise or counterclockwise displacement of the cradle seat 3 in the M direction can be better controlled, thereby better controlling the increase and decrease of the pressure value.

[0042] In specific embodiment 4, Figure 7 As shown, the only difference from the first embodiment is that the limit assembly 9 includes two limit parts 93; the pressure regulating assembly 10 includes two adjustment parts 100 and an assembly part 101. The limit parts 93 are arranged on both sides of the assembly part 101 in the M direction. In this embodiment, the assembly part 101 is fixedly installed with two opposite side walls inside the lower fixing card 32, such as welding, etc., and has two threaded through holes in the M direction. The adjustment part 100 adopts an adjustment bolt, and the two adjustment bolts pass through the threaded holes in the M direction and the opposite direction of the M direction respectively, and contact with the two opposite limit parts 93. Fine-tuning the two adjustment parts 100 respectively can increase or decrease the corresponding clockwise or counterclockwise displacement of the cradle seat 3 in the M direction. In this embodiment, the process of pressurization and pressure release is better controlled.

[0043] In specific embodiment 5, Figure 8As shown, the difference from the second embodiment is that the limiting assembly 9 also includes a pad 95, and the gripping surface of the lower fixing card 32 is circumferentially arranged with an arc-shaped notch 321, and the pad 95 is arranged in the notch 321. The pad 95 in this embodiment adopts a steel block with an axial threaded through hole. The top of the pad 95 is a bearing surface 95A that matches the contact surface of the cradle support rod shaft 4; the bottom outer arc surface 95B of the pad 95 matches the notch of the circumferential arc-shaped notch 321, so that the cradle seat moves along the arc direction relative to the support rod shaft via the pad 95 and the notch 321; the limiting part 93 is arranged in the lower fixing card 32, which is a square steel block with an axial threaded hole, and its top is connected to the bottom of the pad 95, and the threaded hole of the square steel block is aligned with the threaded hole of the pad 95, and the positioning bolt 91 passes through the limiting part 93, the pad 95 and the positioning nut 92 in sequence to fix the limiting assembly on the cradle support rod shaft 4.

[0044] In specific embodiment six, Fig. 9 As shown, the only difference from the fifth embodiment is that the limiting portion 93 and the cushion block 95 are an integrally formed steel block.

[0045] In specific embodiment seven, Fig.10 As shown, the only difference from the third embodiment is that the cradle support rod shaft 4 is a hexagonal support rod shaft, and a gripping round tube 6 is added to be fixedly connected to the cradle support rod shaft 4. Specifically, the gripping round tube 6 is welded and fixed to the six vertices of the hexagonal support rod shaft. The pressure transmission crank 11 is inserted into the opening of the gripping round tube 6; the gripping round tube 6 has a round hole that matches the positioning nut 92.

[0046] Based on the above implementation process, the only difference lies in the related designs of the limit assembly 9 and the voltage regulating assembly 10. The following three specific embodiments are listed.

[0047] Embodiment eight, as Fig.11a As shown, the limiting part 93 of the limiting assembly 9 is a square steel block, and the adjusting part 100 is a round head hexagon socket bolt. The head of the adjusting part 100 abuts against the side of the limiting part 93. When the adjusting part 100 is rotated, the force of the head on the pressure surface of the limiting part 93 changes. The head of the adjusting part 100 is arc-shaped, and it is not easy to produce an indentation when pressing. The accuracy of the pressure value adjusted each time can still be maintained after long-term use. This solution has a simple structure, is easy to operate, and is reliable and effective.

[0048] Embodiment 9, as Fig.11bAs shown, with the intersection of the extension line of the central axis of the adjusting part 100 and the side of the limiting part 93 as the axis, a threaded through hole 94, i.e., the limiting through groove, is opened in the limiting part 93 in the moving direction of the adjusting part 100. The adjusting part 100 cooperates with the threaded through hole 94. In this embodiment, the adjusting part 100 uses an M6 hexagon socket bolt, which, when it enters or exits the threaded through hole 94, can generate a pushing or pulling force on the limiting part 93 through the interaction between the threads, so that the pressure regulating component 10 can achieve forward and backward bidirectional movement relative to the limiting component 9, and accordingly can adjust the cradle seat 3 to achieve both pressurization and pressure release, and the adjustment range of the pressure value of this scheme is wider due to the larger amplitude of the relative displacement between the adjusting part 100 and the limiting part 93.

[0049] Embodiment ten, as Fig.11c As shown, the difference from the ninth embodiment is that arc grooves 102 are arranged on the two opposite inner walls of the lower fixing card 32, and the assembly part 101 is limited to slide in the arc groove 102; when the adjustment part 100 rotates into or out of the threaded through hole 94, the interaction between the threads generates a pushing or pulling force on the limit part 93. Since the assembly part 101 can slide in the arc groove 102, the direction of displacement of the limit part 93 by the adjustment part 100 can be kept tangent to the circumferential direction of the cradle support rod shaft 4. In addition, after long-term use, the adjustment part 100 can maintain good rigidity, and the resulting cradle pressure value changes more continuously and smoothly, with better consistency, and can avoid adjustment deviation to the greatest extent.

[0050] The above-mentioned embodiment can achieve the technical effect expected by the present invention. It has a simple structure and can obtain a wider cradle pressure adjustment range. At the same time, it is not limited to the existing setting position of the pressure regulating device, so that the working space layout of the spinning machine is more flexible and the operation is quick. The relative position change between the limit assembly and the cradle seat transmits the pressure change, which can ensure the pressure consistency. After the adjustment is completed, the cradle seat cannot be displaced, taking into account stability.

[0051] The present invention is not limited to the specific details in the above-mentioned embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention. The various specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further explain various possible combinations.

Claims

1. A spinning machine cradle, comprising a handle, a rocker arm, and a cradle seat; the cradle seat comprises a pressure transmission crank, an upper fixing card, and a lower fixing card, the upper fixing card and the lower fixing card are closed to form a circular space, and the circular space is matched with the round tube cradle support rod shaft; the lower end of the pressure transmission crank is against the air bag hole reserved in the round tube cradle support rod shaft, characterized in that: The cradle seat is provided with a pressure fine-tuning component, and the pressure fine-tuning component includes a limit assembly and a pressure regulating assembly. The pressure fine-tuning component is adjusted so that the cradle seat can rotate appropriately around the axis of the support rod shaft. The pressure regulating assembly includes two adjusting parts and at least one assembling part, and the assembling part fixes the pressure regulating assembly on the cradle seat, and the adjusting part is arranged on the assembling part and contacts with the limit assembly; changing the action force between the adjusting part and the limit assembly can make the cradle seat move appropriately relative to the limit assembly; the limit assembly includes at least one limit assembly, and the limit assembly is fixedly connected to the circumferential direction of the outer surface of the cradle support rod shaft side; the two adjusting parts respectively change the action force between the adjusting part and the limit assembly so that the cradle seat can move appropriately in two corresponding opposite directions relative to the limit assembly; the contact surface between the adjusting part and the limit assembly is an arc surface; a limit slot is provided in the limit assembly, and the adjusting part moves in the limit slot when adjusting the pressure.

2. A spinning machine cradle according to claim 1, characterized in that: The limiting part of the limiting assembly is matched with a bolt and a circular nut and is fixedly connected with the circular opening on the surface of the supporting rod shaft of the round tube cradle.

3. A spinning machine cradle according to claim 1, characterized in that: The limiting assembly comprises two limiting parts; the limiting parts respectively limit the displacement of the cradle seat in two opposite directions around the circumference of the support rod axis.

4. A spinning machine cradle according to claim 1, characterized in that: The limiting assembly also includes a cushion block; the gripping surface of the cradle seat in contact with the support rod shaft is provided with an arc-shaped notch, and the cushion block is arranged in the arc-shaped notch and can move along the arc direction.

5. A spinning machine cradle according to claim 4, characterized in that: The inner arc surface of the cushion block matches the outer surface of the cradle support rod shaft, and the curvature of the outer arc surface of the cushion block matches the arc-shaped groove of the cradle seat. During adjustment, the cradle seat can move relative to the cushion block or the circular support rod shaft.

6. A spinning machine cradle according to claim 1, characterized in that: Arc grooves are arranged on two opposite side walls of the cradle seat, and the pressure regulating assembly is limited to slide along the arc direction in the arc groove. The movement direction of the pressure regulating assembly during the pressure fine-tuning process remains tangent to the circumference of the cradle support rod axis.

7. A cradle pressure regulating device for a spinning machine using a polygonal cradle support rod shaft, characterized in that: A holding round tube is fixedly sleeved on the outside of the polygonal cradle support rod shaft; the holding round tube is reserved with an opening matching the polygonal support rod shaft; using the spinning machine cradle as described in any one of claims 1 to 3, the round hole formed by the upper and lower fixed card closing of the cradle seat of the cradle is adapted to the holding round tube; and the pressure fine-tuning from the rear or bottom of the cradle is achieved by means of a fine-tuning pressure component.

8. A method for fine-tuning the pressure of a spinning machine cradle, characterized in that: The spinning machine cradle pressure regulating device using the polygonal cradle support rod shaft as claimed in claim 7 is used to measure the first pressure value of the cradle and obtain the difference between the pressure value and the target value; the second step is to adjust the pressure fine-tuning component from the rear or lower part of the cradle according to the difference obtained in the first step, and test the adjusted second pressure value; the third step is to determine whether the second pressure value reaches the range to be adjusted, and if it reaches the range to be adjusted, the adjustment is completed; If adjustment is still required, repeat step 2.

9. A method for fine-tuning the pressure of a spinning machine cradle according to claim 8, characterized in that: Before adjustment or before the first step, the opening gaps of the upper and lower fixing cards are appropriately loosened; after adjustment, the opening gaps of the upper and lower fixing cards are tightened to completely lock the cradle seat.

10. The method for fine-tuning the pressure of a spinning machine cradle according to claim 8, characterized in that: When the cradle support rod shaft is a polygonal support rod shaft, when installing the cradle seat, first put the holding round tube on the polygonal support rod shaft, and the inner wall circumference of the holding round tube forms a fixed connection with the contact part of the polygonal cradle support rod shaft; or replace the polygonal cradle support rod shaft with a round tube cradle support rod shaft.

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