Quick pressure adjusting mechanism for compression spring

Abstract

The invention provides a compression spring pressure fast adjusting mechanism which comprises an adjusting unit, a spring unit, a guide unit and a locking unit, the spring unit comprises a compression spring, a mounting seat and a spring inner shaft, the spring inner shaft penetrates through the mounting seat, and the upper end and the lower end of the spring inner shaft are fixed to the mounting seat through a cover plate and a bottom plate respectively; the compression spring sleeves the outer side of the spring inner shaft, one end of the compression spring abuts against a step at the lower end of the spring inner shaft, and the other end of the compression spring abuts against an adjusting block of the adjusting unit sleeving the spring inner shaft; the cover plate is provided with an adjusting unit used for adjusting the compression spring. A guide unit is arranged between the adjusting unit and a screw rod of the spring inner shaft, so that the spring inner shaft moves in the axial direction; a locking unit is arranged on the outer side of the mounting base and used for locking the adjusting unit. The abrasion loss can be slightly compensated through the high-precision adjusting mechanism, the optimal pressure can be recovered without great adjustment, and the pressure can be accurately adjusted in multiple gears through the spring of the adjusting mechanism.

Description

Technical Field

[0001] This invention relates to a spring adjustment device, and more particularly to a compression spring pressure quick adjustment mechanism, which is suitable for equipment scenarios that require frequent adjustment of spring preload and where the preload adjustment can be performed in equal increments. Background Technology

[0002] like Figure 1 The existing bolt-fastening adjustment mechanism shown involves adjusting the compression spring 101 on the screw 100 by first loosening the outer first nut 103, then screwing the second nut 102 (the support for the compression spring 101) to the desired position, and finally tightening the first nut 103. This existing bolt-fastening adjustment mechanism suffers from technical problems such as cumbersome operation, low efficiency, difficulty in controlling the preload, inability to achieve equal-progressive tension, and poor positioning accuracy.

[0003] In the scenario of adjusting the pressure rollers of the roller traction assembly in cotton spinning drawing frames, the existing bolt-fastened adjustment mechanism is used for drawing and drafting. The clamping force of the pressure rollers affects the stress state of the fibers during drafting. Insufficient pressure may cause slippage and result in fine knots, while excessive pressure may clamp the fibers and result in thick knots. The pressure of the pressure rollers varies under different operating conditions for different fiber varieties (pure cotton, polyester-cotton blend, viscose) and different sliver linear densities (weight). Usually, it is necessary to adjust the pressure rollers in an equal and progressive manner. Over long-term operation, the pressure rollers and rollers will wear down, causing changes in the contact state of the gripping jaws, which in turn leads to a decrease in gripping force. Summary of the Invention

[0004] This invention provides a rapid adjustment mechanism for compression spring pressure. Addressing the shortcomings of existing bolt-type adjustment mechanisms that fail to meet requirements for adjustment accuracy and ease of operation, this invention solves technical problems such as low adjustment efficiency, difficulty in controlling preload, inability to achieve equal increments, and poor positioning accuracy. The technical solution is as follows:

[0005] A compression spring pressure quick adjustment mechanism includes an adjustment unit, a spring unit, a guide unit, and a locking unit. The spring unit includes a compression spring, a mounting base, and an inner spring shaft. The inner spring shaft passes through the mounting base, and its upper and lower ends are fixed to the mounting base by a cover plate and a base plate, respectively. The compression spring is sleeved on the outside of the inner spring shaft, with one end abutting against a step at the lower end of the inner spring shaft and the other end abutting against an adjustment block of the adjustment unit sleeved on the inner spring shaft. The cover plate is equipped with an adjustment unit for adjusting the compression spring. A guide unit is provided between the adjustment unit and the screw of the inner spring shaft, allowing the inner spring shaft to move axially. A locking unit is provided on the outside of the mounting base for locking the adjustment unit.

[0006] The inner shaft of the spring is divided into a screw, a step, and an end from top to bottom. The screw is divided into a first screw and a second screw with different diameters, and the diameter of the first screw is smaller than that of the second screw. The first screw is provided with an annular protrusion, which is used to contact the cover plate and define the screw position of the inner shaft of the spring.

[0007] The adjustment unit includes an adjustment screw, an adjustment block, and a scale display block. The adjustment screw is mounted on the cover plate and can be rotated on the cover plate. The adjustment block is sleeved on the screw of the inner shaft of the spring, with its upper end abutting against the adjustment screw and its lower end abutting against the compression spring through the washer of the spring unit.

[0008] The adjustment block has a scale display block on its side, and the mounting base has an opening on its side for the scale display block to extend out.

[0009] The guiding unit includes a guide sleeve, which is embedded inside the adjusting block and engages with the screw of the inner shaft of the spring.

[0010] The locking unit includes a spring and a pawl connected together, the pawl passing through the side of the mounting base and abutting against a stop groove on the side of the adjusting block.

[0011] The side of the adjusting block is provided with multiple evenly arranged stop grooves, and the distance between adjacent stop grooves is 1mm.

[0012] The adjustment block is equipped with a scale display block that points to the scale on the mounting base. Adjacent scales represent the unit distance between adjacent stop grooves, and the spring pressure value achieved by the unit distance between adjacent stop grooves is the same.

[0013] The cover plate is fixedly installed on the upper surface of the mounting base by the first bolt, and the base plate is fixedly installed on the lower surface of the mounting base by the second bolt.

[0014] A method for quickly adjusting the pressure of a compression spring, comprising the following steps for compression and relaxation:

[0015] S1: The spring is initially in a compressed state;

[0016] S2: Rotate the adjusting screw to press down the spring. When the pressing amount reaches one unit spacing of the stop groove, the pawl will lock into the stop groove on the side of the adjusting block.

[0017] S3: Repeat step S2 until the spring pressure is adjusted to the set value. The spring pressure value corresponding to the unit spacing of each stop groove is the same.

[0018] S4: When it is necessary to reduce the spring force, loosen the adjusting screw and press the spring upward. At this time, the spring in the compressed state drives the adjusting block to move upward. Determine the required adjustment position according to the alignment of the scale display block with the scale on the mounting base.

[0019] The compression spring pressure quick adjustment mechanism can, in the scenario of pressure roller adjustment, compensate for wear in a small amount through a high-precision adjustment mechanism, and restore the optimal pressure without large adjustments. The spring of the adjustment mechanism can precisely adjust the pressure in multiple levels. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the existing bolt-fastened adjustment mechanism;

[0021] Figure 2 This is a schematic diagram of the structure of the compression spring pressure quick adjustment mechanism;

[0022] Figure 3 This is a side view of the compression spring pressure quick adjustment mechanism;

[0023] Figure 4 This is an exploded structural diagram of the compression spring pressure rapid adjustment mechanism;

[0024] Figure 5 This is a schematic diagram of the inner shaft of the spring;

[0025] The labels in the diagram are as follows:

[0026] 1-Cover plate; 2-Scale display block; 3-Adjusting block; 4-Spring; 5-Pawl; 6-Mounting base; 7-Compression spring; 8-Spring inner shaft; 9-Adjusting screw; 10-Washer; 11-Guide bushing; 12-Base plate; 13-Annular protrusion; 14-First screw; 15-Second screw; 16-Step; 17-End; 18-First bolt; 19-Second bolt. Detailed Implementation

[0027] like Figure 1 As shown, the compression spring pressure quick adjustment mechanism includes an adjustment unit, a spring unit, a guide unit, and a locking unit. The spring unit includes a compression spring 7, a mounting base 6, and a spring inner shaft 8. The spring inner shaft 8 passes through the mounting base 6, and its upper and lower ends are fixed to the mounting base 6 by a cover plate 1 and a base plate 12, respectively. The compression spring 7 is sleeved on the outside of the spring inner shaft 8, with one end abutting against the step 16 at the lower end of the spring inner shaft 8, and the other end abutting against the adjustment block 3 of the adjustment unit sleeved on the spring inner shaft 8. The cover plate 1 is equipped with an adjustment unit for adjusting the compression spring 7. A guide unit is provided between the adjustment unit and the screw of the spring inner shaft 8, allowing the spring inner shaft 8 to move axially. The mounting base 6 is equipped with a locking unit for locking the adjustment unit. The spring unit also includes a shim 10, which is provided between the adjustment block 3 and the compression spring 7.

[0028] The inner spring shaft 8 is divided into a screw, a step 16, and an end 17 from top to bottom. The screw is divided into a first screw 14 and a second screw 15 with different diameters, and the diameter of the first screw 14 is smaller than that of the second screw 15. The first screw 14 is provided with an annular protrusion 13, which is used to contact the cover plate 1 and define the screw position of the inner spring shaft 8.

[0029] The adjustment unit includes an adjusting screw 9, an adjusting block 3, and a scale display block 2. The adjusting screw 9 is mounted on the cover plate 1 and can be rotated on the cover plate 1. The adjusting block 3 is sleeved on the screw of the inner shaft 8 of the spring, with its upper end abutting against the adjusting screw 9 and its lower end abutting against the compression spring 7 through a washer 10. The scale display block 2 is provided on the side of the adjusting block 3, and the side of the mounting base 6 is provided with an opening for the scale display block 2 to extend out.

[0030] The intercept of the adjusting screw 9 is equal to the scale increment value of the scale display block 2. In this embodiment, the spring pressure increment of the corresponding compression spring 7 is 30N per scale increment. The specific value can be selected according to the requirements of the compression spring 7 and the scale increment value and other parameters.

[0031] The cover plate 1 is fixedly mounted on the upper surface of the mounting base 6 by the first bolt 18, and the base plate 12 is fixedly mounted on the lower surface of the mounting base 6 by the second bolt 19. The cover plate 1 and the mounting base 6 are connected by bolts, which serves to limit the displacement of the adjusting block 3, spring 7, etc. below.

[0032] The guiding unit includes a guide sleeve 11, which is embedded inside the adjusting block 3 and cooperates with the screw of the inner spring shaft 8, especially with the first screw 14. When the inner spring shaft 8 moves axially, the guide sleeve 11 prevents the screw of the inner spring shaft 8 from deflecting during the adjustment process. The guide sleeve 11 is cylindrical and serves to separate the adjusting block 3 and the inner spring shaft 8. Its inner side passes through the screw of the inner spring shaft 8, and its outer side contacts the central through hole of the adjusting block 3.

[0033] The locking unit includes a spring plate 4 and a pawl 5. The spring plate 4 is mounted on the side of the mounting base 6, and the spring plate 4 and the pawl 5 are fixedly connected. The side of the mounting base 6 is provided with an opening for the pawl 5 to pass through. The pawl 5 passes through the side of the mounting base 6 and abuts against the side of the adjusting block 3. The side of the adjusting block 3 is provided with multiple evenly arranged stop grooves, and the distance between adjacent stop grooves is 1mm. In this embodiment, the distance between adjacent stop grooves can be set according to the spring elasticity coefficient. When the adjusting screw 9 is pressed down, the adjusting block 3 is pressed down with the adjusting screw 9, which drives the compression spring 7 to compress. The pawl 5 is subjected to the elastic force of the spring plate 4, and its end always abuts against the stop groove on the side of the adjusting block 3. Each time the spacing of the stop groove is adjusted, the pawl 5 is stuck in the corresponding stop groove. At this time, the adjusting screw 9 is released, and the scale line on the scale display block 2 coincides with the corresponding scale line on the mounting base 6. The specific position and pressure of the compression spring 7 can be determined according to the scale line. To unlock, press the spring 4 upwards to activate the pawl 5 and unlock the compression spring 7.

[0034] Furthermore, the adjusting block 3 is equipped with a scale display block 2, pointing to the scale on the mounting base. Adjacent scales represent the unit distance between adjacent stop grooves, and the spring pressure value achieved by the unit distance between adjacent stop grooves is the same. In this embodiment, the scale accuracy is 30N, calibrated according to the linear relationship between the pressure and compression amount of the compression spring, which facilitates quick pre-adjustment by the operator and improves adjustment efficiency.

[0035] When using this technical solution, rotate the adjusting screw 9 to press down the spring 7. When the pressing amount reaches 1mm (corresponding to the unit spacing of the stop groove on the adjusting block 3), the pawl 5 locks the adjusting block 3. At this time, the spring adjustment amount is exactly 1mm. Repeat the above actions to continuously and quickly adjust the spring pressure by the same value. When it is necessary to reduce the spring force, loosen the adjusting screw 9 and press the spring piece 4 upward. At this time, the spring 7 in the compressed state drives the upper part to move upward. According to the overlap of the scale on the scale display block 2 and the scale on the mounting base 6, the required adjustment position is determined.

[0036] The scale lines on the scale display block 2 can indicate the gear position, pressure value, or distance. According to Hooke's Law, the pressure of a spring is linearly distributed within its elastic limit, and the adjustment pressure can be calculated.

[0037] The present invention has the following advantages:

[0038] (1) High adjustment efficiency: Compared with the traditional method of adding shims or cutting the spring length, this method significantly improves the adjustment efficiency of spring preload;

[0039] (2) The spring preload can be adjusted in a progressive and equal manner: Since the spring compression changes at equal intervals when the pawl 5 is engaged in a stop groove, the preload can be adjusted precisely and equally. Compared with the traditional thread adjustment, it is more accurate and reliable.

[0040] (3) The magnitude of the preload can be visually adjusted: by aligning the position of the scale display block 2 with the markings on the mounting base 6, the corresponding gear or actual pressure can be read;

[0041] (4) Easy to operate: When the adjusting block 3 is adjusted to the required position, the pawl 5 will be locked in the corresponding stop groove. To unlock, simply press the spring piece. The operation is convenient.

Claims

1. A compression spring pressure quick adjustment mechanism, characterized in that: The device includes an adjustment unit, a spring unit, a guide unit, and a locking unit. The spring unit comprises a compression spring, a mounting base, and an inner spring shaft. The inner spring shaft passes through the mounting base, and its upper and lower ends are fixed to the mounting base by a cover plate and a base plate, respectively. The compression spring is sleeved on the outside of the inner spring shaft, with one end abutting against a step at the lower end of the inner spring shaft and the other end abutting against an adjustment block of the adjustment unit sleeved on the inner spring shaft. The cover plate is equipped with an adjustment unit for adjusting the compression spring. A guide unit is provided between the adjustment unit and the screw of the inner spring shaft, allowing the inner spring shaft to move axially. A locking unit is provided on the outside of the mounting base for locking the adjustment unit.

2. The compression spring pressure quick adjustment mechanism according to claim 1, characterized in that: The inner shaft of the spring is divided into a screw, a step, and an end from top to bottom. The screw is divided into a first screw and a second screw with different diameters, and the diameter of the first screw is smaller than that of the second screw. The first screw is provided with an annular protrusion, which is used to contact the cover plate and define the screw position of the inner shaft of the spring.

3. The compression spring pressure quick adjustment mechanism according to claim 1, characterized in that: The adjustment unit includes an adjustment screw, an adjustment block, and a scale display block. The adjustment screw is mounted on the cover plate and can be rotated on the cover plate. The adjustment block is sleeved on the screw of the inner shaft of the spring, with its upper end abutting against the adjustment screw and its lower end abutting against the compression spring through the washer of the spring unit.

4. The compression spring pressure quick adjustment mechanism according to claim 3, characterized in that: The adjustment block has a scale display block on its side, and the mounting base has an opening on its side for the scale display block to extend out.

5. The compression spring pressure quick adjustment mechanism according to claim 1, characterized in that: The guiding unit includes a guide sleeve, which is embedded inside the adjusting block and engages with the screw of the inner shaft of the spring.

6. The compression spring pressure quick adjustment mechanism according to claim 1, characterized in that: The locking unit includes a spring and a pawl connected together, the pawl passing through the side of the mounting base and abutting against a stop groove on the side of the adjusting block.

7. The compression spring pressure quick adjustment mechanism according to claim 6, characterized in that: The side of the adjusting block is provided with multiple evenly arranged stop grooves, and the distance between adjacent stop grooves is 1mm.

8. The compression spring pressure quick adjustment mechanism according to claim 1, characterized in that: The adjustment block is equipped with a scale display block that points to the scale on the mounting base. Adjacent scales represent the unit distance between adjacent stop grooves, and the spring pressure value achieved by the unit distance between adjacent stop grooves is the same.

9. The compression spring pressure quick adjustment mechanism according to claim 1, characterized in that: The cover plate is fixedly installed on the upper surface of the mounting base by the first bolt, and the base plate is fixedly installed on the lower surface of the mounting base by the second bolt.

10. A method for rapidly adjusting the pressure of a compression spring, wherein compression and relaxation include the following steps: S1: The spring is initially in a compressed state; S2: Rotate the adjusting screw to press down the spring. When the pressing amount reaches one unit spacing of the stop groove, the pawl will lock into the stop groove on the side of the adjusting block. S3: Repeat step S2 until the spring pressure is adjusted to the set value. The spring pressure value corresponding to the unit spacing of each stop groove is the same. S4: When it is necessary to reduce the spring force, loosen the adjusting screw and press the spring upward. At this time, the spring in the compressed state drives the adjusting block to move upward. Determine the required adjustment position according to the alignment of the scale display block with the scale on the mounting base.

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