Steel ball mounting device of valve rod positioning assembly

Abstract

The utility model discloses a steel ball mounting device of a valve rod positioning assembly, which comprises a square-frame-shaped support, a rotatable supporting seat is mounted in the middle of the lower end in the support, and a supporting sleeve is mounted on the supporting seat in a positioning and inserting manner and used for supporting the valve rod positioning assembly to be mounted; a lifting air cylinder is arranged in the middle of the upper end of a support, a pressing sleeve is connected to the lower end of a piston rod of the lifting air cylinder, U-shaped notches are evenly distributed in the circumference of the lower end of the pressing sleeve, a connecting plate is arranged outside the pressing sleeve in a sleeved mode through clearance fit, and three ball pressing mechanisms are evenly distributed on the circumference of the lower face of the connecting plate and correspond to the U-shaped notches respectively. And steel balls of the valve rod positioning assembly are pushed into radial through holes uniformly distributed in the positioning sleeve. The device can realize one-time press-fitting forming of three steel balls of the valve rod positioning assembly, so that the labor intensity can be reduced, and the working efficiency can be improved; and moreover, the entry standard of workers in the process can be reduced, so that women or weak people can be competent for the work of the project.

Description

Technical Field

[0001] The utility model relates to a mounting device, in particular to a steel ball mounting device of a valve stem positioning component. Background Art

[0002] The valve stem positioning assembly is installed at one end of the valve stem of the hydraulic reversing valve, and is used to achieve auxiliary positioning after the valve stem is reversing. The existing valve stem positioning assembly includes a positioning column, a pressure spring, a spring seat, a positioning sleeve and a positioning steel ball, wherein the pressure spring and the spring seat are sequentially sleeved on the positioning sleeve, and the three positioning steel balls respectively pass through the radial through holes evenly distributed on the positioning sleeve and are stuck between the spring seat and the V-groove on the positioning column under the action of the pressure spring. The positioning column is provided with three V-grooves. During installation, the positioning column is fixed to one end of the valve stem. When the valve stem moves in reverse direction, the steel ball is pushed radially away from the current V-groove. When the V-groove at the next position reaches the steel ball position, the steel ball enters the V-groove under the push of the pressure spring and the spring seat to complete the positioning of the valve stem after reversing.

[0003] The existing steel ball installation device usually uses a sleeve with multiple U-shaped notches evenly distributed at one end of the sleeve. During installation, hold the sleeve and press down the spring seat until the evenly distributed radial through holes on the positioning sleeve are completely exposed, and then press the three positioning steel balls into the radial through holes respectively. After loosening the sleeve, the positioning steel balls are clamped between the spring seat and the V-shaped groove on the positioning column under the action of the pressure spring.

[0004] The following problems exist when installing the valve stem positioning assembly using the existing steel ball installation device:

[0005] 1. The sleeve needs to be pressed down manually, which requires a certain amount of strength from the assembler. Moreover, if the installation time is a little longer, the worker will be easily fatigued, which will affect the installation efficiency.

[0006] 2. When the steel ball is pressed in manually, it is easy to fall out of your hand due to its small diameter and smooth surface.

[0007] 3. Since the three steel balls are evenly distributed along the circumference of the positioning sleeve, one person cannot press all three steel balls in at one time. It takes two or three times to press all the steel balls in, which is inefficient. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide a steel ball installation device of a valve stem positioning assembly which can reduce labor intensity and improve work efficiency.

[0009] In order to solve the above problems, the utility model adopts the following technical solutions:

[0010] A steel ball installation device for a valve stem positioning assembly comprises a square frame bracket, a rotatable support seat is installed in the middle of the lower end of the bracket, and a support sleeve is inserted and positioned on the support seat to support the valve stem positioning assembly to be installed;

[0011] A lifting cylinder is provided in the middle of the upper end of the bracket, a pressing sleeve is connected to the lower end of the piston rod of the lifting cylinder, U-shaped notches are evenly distributed on the circumference of the lower end of the pressing sleeve, a connecting plate is provided on the outside of the pressing sleeve through a clearance fit, and three ball pressing mechanisms are evenly distributed on the circumference below the connecting plate. The ball pressing mechanisms correspond to a U-shaped notch respectively, and are used to push the steel balls of the valve stem positioning assembly into the radial through holes evenly distributed on the positioning sleeve.

[0012] As a further preference, a base is fixed in the middle of the lower end of the bracket, and the support seat is installed on the base through a thrust bearing; a positioning plug is installed in the center hole of the support seat to facilitate positioning of the valve stem positioning assembly to be installed.

[0013] As a further preference, an annular boss is provided in the middle of the outer edge of the pressing sleeve, the connecting plate is three-petal-shaped and welded with a center sleeve, and the center sleeve is sleeved outside the pressing sleeve and clamped on the annular boss.

[0014] As a further preference, the ball pressing mechanism includes a side cylinder seat, on which are provided a steel ball trough and a steel ball trajectory which are vertically connected to each other, the steel ball trajectory being arranged radially along the pressing sleeve, and a side cylinder being installed on the outer side of the side cylinder seat, the piston rod of the side cylinder being inserted into the steel ball trajectory; a ball head plunger is installed on the side cylinder seat in front of the discharge port of the steel ball trough, so that only one steel ball in the steel ball trough can fall into the steel ball trajectory and be clamped between the piston rod of the side cylinder and the ball head plunger.

[0015] As a further preference, a discharge nozzle is inserted at the inner end of the steel ball trajectory on the side cylinder seat, and the discharge nozzle is close to the outer side of the U-shaped notch, so as to accurately push the steel ball through the U-shaped notch into the evenly distributed radial through holes on the positioning sleeve.

[0016] As a further preference, three feeding holes are evenly distributed on the circumference of the connecting plate, and the feeding holes correspond one-to-one to the steel ball troughs of the three ball pressing mechanisms. A feeding assembly is provided on each feeding hole to allow the steel ball to enter the feeding port of the steel ball trough and fall into the steel ball trajectory.

[0017] As a further preference, the feeding assembly includes a trough upper cover, which is inserted into the upper opening of the feeding hole through a clearance fit, and a probe passes through the center of the trough upper cover, and the lower end of the probe is inserted into the steel ball trough and connected to a spring pressure head; a reset spring is provided on the probe located above the trough upper cover to achieve reset of the probe after being pressed down.

[0018] As a further preference, a guide sleeve is further provided, which is arranged on the upper end of the positioning column of the valve stem positioning assembly to be installed, and is used to achieve guidance when the pressing sleeve is pressed downward.

[0019] As a further preference, a compression spring is further provided in the pressing sleeve, and the upper end of the compression spring is fixed in the pressing sleeve for pressing the guide sleeve when the pressing sleeve is lifted.

[0020] The beneficial effects of the utility model are:

[0021] By installing a rotatable support seat in the middle of the lower end of the bracket and positioning a support sleeve on the support seat, the valve stem positioning assembly to be installed can be supported; the pressing sleeve is driven downward by the lifting cylinder arranged in the middle of the upper end of the bracket, and the three ball pressing mechanisms evenly distributed on the circumference under the connecting plate sleeved outside the pressing sleeve cooperate, so that the three steel balls of the valve stem positioning assembly can be pushed into the radial through holes evenly distributed on the positioning sleeve; therefore, the three steel balls of the valve stem positioning assembly can be press-fitted and formed at one time, which can not only reduce labor intensity and improve work efficiency; but also lower the entry standard for workers in this process, so that female workers or people with weak physique can also be competent for this project, laying a good foundation for automated and semi-automated mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 yes Figure 1 Left view of .

[0024] Figure 3 yes Figure 1 Three-dimensional structure diagram.

[0025] Figure 4 yes Figure 2 AA section view.

[0026] Figure 5 yes Figure 1 BB cross-sectional view.

[0027] Figure 6 yes Figure 4 Enlarged view of the H part.

[0028] Figure 7 yes Figure 4 A magnified view of part I.

[0029] In the figure: bracket 1, base 2, support sleeve 3, support seat 4, discharge nozzle 5, ball plunger 6, side cylinder 7, side cylinder seat 8, connecting plate 9, center sleeve 10, lifting cylinder 11, unloading assembly 12, pressing sleeve 13, guide sleeve 14, positioning plug 15, spring pressure head 16, trough upper cover 17, return spring 18, compression spring 19, pressure cover 20, probe 21, positioning sleeve 22, pressure spring 23, spring seat 24, positioning column 25. DETAILED DESCRIPTION

[0030] like Figure 1 to Figure 7As shown, the utility model relates to a steel ball installation device for a valve stem positioning assembly, comprising a square frame bracket 1, a base 2 is fixed in the middle of the lower end cross beam in the bracket 1, a support seat 4 is installed on the base 2 through a thrust bearing; a positioning plug 15 is installed in the center hole of the support seat 4 to facilitate positioning of the valve stem positioning assembly to be installed. A support sleeve 3 is inserted and positioned on the support seat 4 through an annular groove provided at the upper end of the positioning plug 15, and is used to support the valve stem positioning assembly to be installed.

[0031] A lifting cylinder 11 is fixed in the vertical direction in the middle of the crossbeam at the upper end of the bracket 1. The lifting cylinder 11 is arranged coaxially with the support sleeve 3. A pressing sleeve 13 is connected to the lower end of the piston rod of the lifting cylinder 11 through a thread. Six U-shaped notches are evenly distributed on the circumference of the lower end of the pressing sleeve 13. A connecting plate 9 is provided on the outside of the pressing sleeve 13 through a clearance fit. Three ball pressing mechanisms are evenly distributed on the circumference under the connecting plate 9. The ball pressing mechanisms correspond to a U-shaped notch respectively, and are used to push the steel balls of the valve stem positioning assembly into the radial through holes evenly distributed on the positioning sleeve.

[0032] An annular boss is provided in the middle of the outer edge of the pressing sleeve 13. The connecting plate 9 is three-petal shaped and welded to the outer edge of a center sleeve 10. The center sleeve 10 is fitted on the outside of the pressing sleeve 13 through a sliding clearance and is clamped on the annular boss.

[0033] The ball pressing mechanism includes a side cylinder seat 8 fixed by screws under the connecting plate 9, and a steel ball trough 801 and a steel ball trajectory 802 which are vertically connected to each other are provided on the side cylinder seat 8. The steel ball trough 801 is in the shape of a stepped hole, and the aperture of the discharge port at the lower end is smaller than the aperture of the upper end, and is used to place the steel balls to be installed; the steel ball trajectory 802 is arranged radially along the pressing sleeve 13, and a side cylinder 7 is fixedly installed on the outer side of the side cylinder seat 8, and the piston rod of the side cylinder 7 is inserted into the steel ball trajectory 802; a ball head plunger 6 is installed on the side cylinder seat 8 at the front side of the discharge port of the steel ball trough 801, and the ball head at the front end of the ball head plunger 6 is inserted into the steel ball trajectory 802, so that only one of the steel balls in the steel ball trough 801 can fall into the steel ball trajectory 802 and be clamped between the piston rod of the side cylinder 7 and the ball head plunger 6;

[0034] A sleeve-shaped discharge nozzle 5 is fixedly inserted on the inner end of the steel ball trajectory 802 on the side cylinder seat 8. The discharge nozzle 5 is close to the outer side of the U-shaped notch. The inner diameter of the discharge nozzle 5 and the steel ball trajectory 802 matches the clearance of the steel ball to be installed, so that the steel ball can be accurately pushed into the evenly distributed radial through holes on the positioning sleeve through the U-shaped notch.

[0035] There are three feeding holes 901 evenly distributed on the circumference of the connecting plate 9, and the feeding holes 901 correspond one by one to the steel ball troughs 801 of the three ball pressing mechanisms. A feeding assembly 12 is installed on each feeding hole 901 to allow the steel ball to enter the feeding port of the steel ball trough 801 and fall into the steel ball trajectory 802.

[0036] The feeding assembly 12 includes a trough cover 17, the outer edge of which is stepped and inserted into the upper opening of the feeding hole 901 through a clearance fit, and a probe 21 is passed through the central hole of the trough cover 17 through a clearance fit, and the lower end of the probe 21 is inserted into the steel ball trough 801 and is connected to a spring pressure head 16; a reset spring 18 is sleeved on the probe 21 and located above the trough cover 17, and the upper end of the reset spring 18 is clamped on the upper end of the probe 21 through the pressure cover 20, so as to realize the reset of the probe 21 after being pressed down.

[0037] The steel ball installation device is also provided with a guide sleeve 14, the upper end of the outer edge of the guide sleeve 14 is conical and is sleeved on the upper end of the positioning column of the valve stem positioning assembly to be installed, and is used to guide when the pressing sleeve 13 is pressed down. A compression spring 19 is also provided in the pressing sleeve 13, and the upper end of the compression spring 19 is fixed in the pressing sleeve 13 through a screw plug, and is used to press the guide sleeve 14 when the pressing sleeve 13 is lifted.

[0038] When working, the specific process is as follows:

[0039] 1. Sleeve the positioning sleeve 22 of the valve stem positioning assembly to be installed on the support sleeve 3, rotate the positioning sleeve 22 so that any radial through hole on it is roughly aligned with the axis of the side cylinder 7, and sequentially sleeve the pressure spring 23 and the spring seat 24 on the positioning sleeve 22, then insert the positioning column 25 into the positioning sleeve 22 and the support sleeve 3, and sleeve the guide sleeve 14 on the upper end of the positioning column 25;

[0040] 2. The piston rod of the control lifting cylinder 11 extends, driving the pressing sleeve 13 to move downward and pass through the guide sleeve 14 to press the spring seat 24 to the lower limit position, exposing the radial through hole on the positioning sleeve 22;

[0041] 3. Control the piston rods of the three side cylinders 7 to extend simultaneously, and push the steel ball clamped between the piston rod of the side cylinder 7 and the ball plunger 6 into the radial through hole on the positioning sleeve 22 through the discharge nozzle 5 and the corresponding U-shaped notch; if there is a small deviation between the discharge nozzle 5 and the radial through hole, just manually rotate the connecting plate 9 slightly;

[0042] 4. Control the three side cylinders 7 to reset at the same time, and then control the lifting cylinder 11 to drive the pressing sleeve 13 to reset. The spring seat 24 moves upward under the elastic force of the pressure spring 23 to clamp the steel ball in the radial through hole on the positioning sleeve 22 to complete the assembly; when the pressing sleeve 13 is reset, the guide sleeve 14 is pressed by the compression spring 19 to prevent the guide sleeve 14 from following the pressing sleeve 13 upward;

[0043] 5. When the piston rod of the lifting cylinder 11 is reset and rises to a certain height, the upper end of the probe 21 hits the crossbeam at the upper end of the bracket 1, so that the probe 21 no longer rises with the connecting plate 9. The spring pressure head fixed under the probe 21 squeezes the steel ball, so that the steel ball enters the discharge port of the steel ball trough 801 and falls into the steel ball trajectory 802 for the next assembly.

[0044] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A steel ball installation device for a valve stem positioning assembly, characterized in that: It comprises a square frame bracket, a rotatable support seat is installed in the middle of the lower end of the bracket, and a support sleeve is inserted and positioned on the support seat to support the valve stem positioning assembly to be installed; A lifting cylinder is provided in the middle of the upper end of the bracket, a pressing sleeve is connected to the lower end of the piston rod of the lifting cylinder, U-shaped notches are evenly distributed on the circumference of the lower end of the pressing sleeve, a connecting plate is provided on the outside of the pressing sleeve through a clearance fit, and three ball pressing mechanisms are evenly distributed on the circumference below the connecting plate. The ball pressing mechanisms correspond to a U-shaped notch respectively, and are used to push the steel balls of the valve stem positioning assembly into the radial through holes evenly distributed on the positioning sleeve.

2. A steel ball installation device for a valve stem positioning assembly according to claim 1, characterized in that: A base is fixed in the middle of the lower end of the bracket, and the support seat is installed on the base through a thrust bearing; a positioning plug is installed in the center hole of the support seat to facilitate positioning of the valve stem positioning component to be installed.

3. The steel ball installation device of the valve stem positioning assembly according to claim 1, characterized in that: An annular boss is arranged in the middle of the outer edge of the pressing sleeve. The connecting plate is in a three-petal shape and is welded with a center sleeve. The center sleeve is sleeved outside the pressing sleeve and clamped on the annular boss.

4. The steel ball installation device of a valve stem positioning assembly according to claim 1, characterized in that: The ball pressing mechanism includes a side cylinder seat, on which are provided a steel ball trough and a steel ball trajectory which are vertically connected to each other. The steel ball trajectory is arranged radially along the pressing sleeve, and a side cylinder is installed on the outer side of the side cylinder seat, and the piston rod of the side cylinder is inserted into the steel ball trajectory; a ball head plunger is installed on the side cylinder seat in front of the discharge port of the steel ball trough, so that only one steel ball in the steel ball trough can fall into the steel ball trajectory and be clamped between the piston rod of the side cylinder and the ball head plunger.

5. A steel ball installation device for a valve stem positioning assembly according to claim 4, characterized in that: A discharge nozzle is inserted at the inner end of the steel ball trajectory on the side cylinder seat, and the discharge nozzle is close to the outer side of the U-shaped notch, so as to accurately push the steel ball through the U-shaped notch into the radial through holes evenly distributed on the positioning sleeve.

6. A steel ball installation device for a valve stem positioning assembly according to claim 4, characterized in that: There are three feeding holes evenly distributed on the circumference of the connecting plate, which correspond to the steel ball troughs of the three ball pressing mechanisms one by one. A feeding assembly is provided on each feeding hole to allow the steel ball to enter the feeding port of the steel ball trough and fall into the steel ball trajectory.

7. A steel ball installation device for a valve stem positioning assembly according to claim 6, characterized in that: The feeding assembly includes a trough upper cover, which is inserted into the upper opening of the feeding hole through a clearance fit. A probe runs through the center of the trough upper cover, and the lower end of the probe is inserted into the steel ball trough and connected to a spring pressure head. A reset spring is provided on the probe located above the trough upper cover to achieve reset of the probe after it is pressed down.

8. A steel ball installation device for a valve stem positioning assembly according to any one of claims 1 to 7, characterized in that: A guide sleeve is also provided, which is arranged on the upper end of the positioning column of the valve stem positioning assembly to be installed and is used to guide the pressing sleeve when it is pressed downward.

9. A steel ball installation device for a valve stem positioning assembly according to claim 8, characterized in that: A compression spring is also arranged in the pressing sleeve, and the upper end of the compression spring is fixed in the pressing sleeve and is used for pressing the guide sleeve when the pressing sleeve is lifted.

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