Deep hole mounting method for spring retainer ring

Abstract

The invention provides a deep hole mounting method for a spring retainer ring. A retainer ring pin at the bottom of a radial adjustable unit is inserted into a clamp spring hole of the spring retainer ring; the linear driving unit is driven, so that the lower end of the radial adjustable unit is shrunk in the radial direction, and then the spring clamping ring is driven to be shrunk uniformly through the circumferential clamping ring pin; when the outer diameter of the spring clamping ring is contracted to be smaller than the mounting inner diameter of the ultra-deep hole, the linear driving unit is stopped; the clamping ring installation tool continues to stretch into the ultra-deep hole till the front end of the spring clamping ring makes contact with an installation groove in the ultra-deep hole; the linear driving unit is reversely driven to enable the lower end of the radial adjustable unit to expand in the radial direction, and at the moment, the spring clamping ring is evenly loosened until the spring clamping ring is in a non-contraction state; and then, the spring retainer ring is clamped in the mounting groove, mounting of the ultra-deep hole spring retainer ring is completed, and the retainer ring mounting tool is moved out. The tool is easy to operate and high in installation efficiency, installation of the groove spring retainer ring at the ultra-deep hole can be completed only by rotating the handle clockwise and anticlockwise, and the installation process is simple and efficient.

Description

Technical Field

[0001] This invention relates to a deep-hole installation method for spring retainers, which can safely and quickly complete the installation of spring retainers for products that require installation in ultra-deep holes. Background Technology

[0002] Hydraulic actuators are widely used in modern aerospace products, and many of their internal structures require spring retainers for component positioning. The diversity of actuator structures has led to an increasing number of ultra-deep holes requiring spring retainers. Holes with a length-to-diameter ratio greater than 10–30 (L / d ≥ 10–30) are generally considered deep holes. Holes with a length-to-diameter ratio greater than 30 (L / d > 30) are classified as ultra-deep holes.

[0003] The main difficulties encountered when installing spring retainers in ultra-deep holes are as follows: ① Obstructed view, making it impossible to see the groove at the installation location. ② Due to the excessive depth, the jaws of ordinary retainer pliers are too short, and the jaws of extended retainer pliers have poor rigidity and are prone to interference with the inner hole wall, collision, and scratches on the parts. ③ When using a custom installation sleeve, the retainer is prone to deformation and jamming as it is inserted into the ultra-deep hole. ④ In the narrow space of an ultra-deep hole, it is difficult to apply a uniform force to compress the retainer.

[0004] Deep-hole spring retainers are highly challenging to install, yet they are a common structural feature in aerospace hydraulic products. Therefore, successfully installing deep-hole spring retainers is crucial for product assembly. Consequently, we require a device that enables quick and convenient installation of deep-hole spring retainers. Summary of the Invention

[0005] The purpose of this invention is to address the difficulty of installing spring retainers in ultra-deep holes by providing a simple, convenient, efficient, and easy-to-maintain method for installing spring retainers in deep holes.

[0006] To achieve the above-mentioned objectives, the technical solution of this invention is as follows: A deep-hole mounting method for a spring retainer includes the following steps: Step S1: Assemble the retaining ring mounting fixture, which includes a housing and a drive mechanism and retaining ring pins disposed inside the housing. The bottom of the housing is open. The drive mechanism includes a linear drive unit and a radially adjustable unit that is driven by the linear drive unit and causes the lower end to retract radially. The top of the radially adjustable unit is provided with a plurality of retaining ring pins along the circumferential direction. The retaining ring pins are used to engage with the retaining ring holes of the spring retaining ring, thereby driving the spring retaining ring to move radially. Step S2: Insert the retaining pin at the bottom of the radially adjustable unit into the retaining hole of the spring retaining ring; Step S3: Fix the position of the housing, and then drive the linear drive unit to make the lower end of the radially adjustable unit retract radially, thereby driving the spring retainer to retract evenly through the circumferential retaining pin. Step S4: When the spring retainer retracts to an outer diameter smaller than the inner diameter of the ultra-deep hole installation. At point D, stop the linear drive unit; continue to extend the retainer mounting fixture into the deep hole until the front end of the spring retainer contacts the mounting groove inside the deep hole. Step S5: Reverse drive the linear drive unit to make the lower end of the radially adjustable unit expand radially. At this time, the spring retainer is evenly loosened until it is in a non-contracted state. Then, the spring retainer is locked in the mounting groove to complete the installation of the ultra-deep hole spring retainer. Remove the retainer installation fixture.

[0007] To better realize the present invention, further, the lower end of the radially adjustable unit is provided with a plurality of elastic strips along the circumferential direction, and a sliding sleeve is sleeved on the outer side of the radially adjustable unit. The sliding sleeve is slidably connected to the housing, and the linear drive unit is used to drive the sliding sleeve to move linearly.

[0008] To better realize the present invention, the radially adjustable unit further includes: Elastic cone: Made of elastic material, with a sloping base at the bottom, and a conical sloping surface on the sloping base. The top of the conical sloping surface is close to the center of the elastic cone, and the bottom is far from the center of the elastic cone. The bottom of the elastic cone is slotted. The conical sloping surface of the sloping base and the shell sloping surface at the bottom of the housing are in contact when not in operation. The bottom of the housing is open, and the inner surface of the lower end of the housing is provided with a shell sloping surface. The shell sloping surface is in contact with the conical sloping surface of the sloping base when not in operation. Snap ring pin: Detachably connected to the bottom of the inclined base; the outer diameter of the snap ring pin matches the circlip hole diameter of the spring snap ring to be installed.

[0009] To better realize the present invention, the linear drive unit further includes: Pull rod: Detachably connected to the upper end of the elastic cone; The housing surrounds the outside of the pull rod; End cap: Fixed to the upper end of the housing, the upper end of the pull rod passes through the end cap. Handle: Located at the top of the entire retaining ring mounting fixture, and fixedly connected to the top of the pull rod.

[0010] To better realize the present invention, the outer diameter of the retaining ring mounting fixture is further less than or equal to the inner diameter of the upper end of the ultra-deep hole.

[0011] To better realize the present invention, a fixing bushing is further provided between the outer side of the ultra-deep hole part and the housing, and a fixing bushing is fitted on the top outer side of the housing, and a snap-fit ​​groove is provided between the fixing bushing and the housing corresponding to the ultra-deep hole part.

[0012] The present invention has the following advantages over other installation methods at present: (1) Simple operation and high installation efficiency: The installation of the grooved spring ring in the ultra-deep hole can be completed simply by rotating the handle clockwise or counterclockwise. The installation process is simple and efficient. (2) The circlip installation fixture is simple to manufacture and highly versatile: In the entire circlip installation fixture, only the elastic cone and the shell have a beveled fit relationship, and the other parts have their own tolerances, making the manufacturing process simple. For ultra-deep holes of different diameters, only the diameter of the entire circlip installation fixture needs to be adjusted accordingly; (3) The clamping ring installation fixture is compact and lightweight: the clamping ring pin and tie rod in the clamping ring installation fixture are made of steel, the elastic cone is made of elastic material, and the remaining parts are made of aluminum, making the clamping ring installation fixture lightweight and easy to operate. (4) This invention can be used to install spring clips in ultra-deep holes with different length-to-diameter ratios. It is simple to install, highly efficient, and has a wide range of applications. Attached Figure Description

[0013] Figure 1 This is a flowchart of the deep hole installation method of the spring retainer ring of the present invention.

[0014] Figure 2 This is a schematic diagram of a spring retainer.

[0015] Figure 3 yes Figure 2 A schematic diagram of the mounting location inside an ultra-deep hole component.

[0016] Figure 4 This is a schematic diagram showing the usage status of the circlip installation tool.

[0017] In the diagram: 1-Clamping pin, 2-Elastic cone, 3-Housing, 4-Pull rod, 5-End cap, 6-Bushing, 7-Fixing pin, 8-Handle, 9-Sloping base, 91-Sloping cone, 31-Sloping housing, 10-Spring clamping ring, 101-Clamping ring hole, 11-Arch groove. Detailed Implementation

[0018] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0019] Example 1: A deep-hole mounting method for a spring retainer, such as... Figure 1 As shown, it includes the following steps: Step S1: Assemble the retaining ring mounting fixture, which includes a housing 3 and a drive mechanism and retaining ring pins 1 disposed inside the housing 3. The bottom of the housing 3 is open. The drive mechanism includes a linear drive unit and a radially adjustable unit that is driven by the linear drive unit and causes the lower end to retract radially. The top of the radially adjustable unit is provided with a plurality of retaining ring pins 1 circumferentially. The retaining ring pins 1 are used to engage with the retaining ring holes 101 of the spring retaining ring 10, thereby driving the spring retaining ring 10 to move radially. Step S2: Insert the retaining pin 1 at the bottom of the radially adjustable unit into the retaining hole 101 of the spring retaining ring 10; Step S3: Fix the position of the housing 3, and then drive the linear drive unit to make the lower end of the radially adjustable unit retract radially, thereby driving the spring retainer 10 to retract evenly through the circumferential retainer pin 1. Step S4: When the spring retainer 10 retracts to an outer diameter smaller than the inner diameter of the ultra-deep hole installation. At point D, stop the linear drive unit; continue to extend the retainer mounting fixture into the deep hole until the front end of the spring retainer 10 contacts the mounting groove inside the deep hole. Step S5: Reverse drive the linear drive unit to make the lower end of the radially adjustable unit expand radially. At this time, the spring retainer 10 is evenly loosened until it is in a non-contracted state. Then, the spring retainer 10 is locked in the mounting groove to complete the installation of the ultra-deep hole spring retainer 10. Remove the retainer installation fixture.

[0020] Preferably, the lower end of the radially adjustable unit is provided with a plurality of elastic strips along the circumferential direction, and a sliding sleeve is fitted on the outer side of the radially adjustable unit. The sliding sleeve is slidably connected to the housing 3, and the linear drive unit is used to drive the sliding sleeve to move linearly.

[0021] Preferably, the outer diameter of the retaining ring mounting fixture is less than or equal to the inner diameter of the upper end of the ultra-deep hole. A fixing bushing 6 is provided between the outer side of the ultra-deep hole part and the housing 3. The fixing bushing 6 is also fitted onto the outer top of the housing 3, and a snap-fit ​​groove is provided between the fixing bushing 6 and the housing 3 corresponding to the ultra-deep hole part. When the housing 3 moves to the target position, the lower end of the fixing bushing 6 is fixedly fitted onto the outer side of the ultra-deep hole part, thus fixing its position.

[0022] This invention achieves the contraction and expansion of the spring retainer 10 through simple linear drive, facilitating the installation of the housing 3 with the spring retainer 10 inside deep holes of different inner diameters. This invention can be used to install spring retainers 10 in ultra-deep holes with different length-to-diameter ratios; it is simple to install, highly efficient, widely applicable, and has good practicality.

[0023] Example 2: like Figures 2-4 As shown, this embodiment provides a deep hole mounting method for spring retainers, which is completed using a retainer mounting fixture and includes the following steps: (1) During installation, first install the retaining ring pin 1 into the retaining ring hole 101 of the spring retaining ring 10. (2) Keeping the housing 3 stationary, rotate the handle 8 clockwise. The direction of the thread causes the elastic cone 2 to move upward along the pull rod 4. The pull rod 4 only rotates and does not move upward. The cone slope 91 of the elastic cone 2 undergoes uniform inward deformation due to the compression of the housing slope 31. This causes the retaining pin 1 to lock into the retaining hole 101 of the spring retaining ring 10, causing the spring retaining ring 10 to contract uniformly. (3) When the spring retainer 10 shrinks to an outer diameter smaller than the inner diameter of the ultra-deep hole installation. At time D, stop rotating handle 8 and keep the device stationary; (4) Insert the retaining ring installation fixture and the retracted spring retaining ring 10 into the ultra-deep hole together. When the front end of the spring retaining ring 10 contacts the installation groove in the ultra-deep hole, keep the retaining ring installation fixture still and rotate the handle 8 counterclockwise. The elastic cone 2 moves downward along the pull rod 4 through the direction of the thread. The cone slope 91 of the elastic cone 2 is released from the pressure of the shell slope 31. The elastic cone 2 recovers its deformation evenly. The retaining ring pin 1 on it evenly loosens the spring retaining ring 10 to the non-retracted state. After the spring retaining ring 10 is locked in the installation groove, take the retaining ring installation fixture out of the ultra-deep hole as a whole to complete the installation of the ultra-deep hole spring retaining ring 10.

[0024] like Figure 4 As shown, the retaining ring mounting fixture includes: 2. Elastic cone, 1. Snap ring pin, 3. Housing, 4. Pull rod, 5. End cap, 8. Handle; Elastic cone 2: Made of elastic material, with a sloping base 9 at the bottom and a cone sloping surface 91 on the sloping base 9. The top of the cone sloping surface 91 is close to the center of the elastic cone 2 and the bottom is far from the center of the elastic cone 2. The bottom of the elastic cone 2 is slotted. The cone sloping surface 91 of the sloping base 9 and the shell sloping surface 31 at the bottom of the shell 3 are in contact when not in operation. Snap ring pin 1: Detachably connected to the bottom of the inclined base 9; the outer diameter of snap ring pin 1 matches the diameter of the snap ring hole 101 of the spring snap ring 10 to be installed; Pull rod 4: Detachably connected to the upper end of the elastic cone 2; Housing 3: Surrounds the outside of the pull rod 4. The bottom of housing 3 is open. The inner surface of the lower end of housing 3 is provided with a housing slope 31. The housing slope 31 is in contact with the conical slope 91 of the slope base 9 when not in operation. End cap 5: Fixed to the upper end of housing 3, the upper end of pull rod 4 passes through the end cap 5. Handle 8: Located at the top of the entire retaining ring mounting fixture, and fixedly connected to the top of the pull rod 4.

[0025] Preferably, the bottom of the inclined base 9 is provided with a threaded hole, and the retaining pin 1 is threadedly connected to the inclined base 9 through the threaded hole.

[0026] Preferably, the top of the elastic cone 2 is provided with a threaded hole, and the pull rod 4 is connected to the upper end of the elastic cone 2 through the threaded hole.

[0027] like Figure 2 As shown, preferably, the spring retainer 10 has 3 retainer holes 101; Preferably, the elastic cone 2 is made of spring steel.

[0028] Preferably, the bottom of the elastic cone 2 has an arched groove 11.

[0029] Preferably, a fixing pin 7 is inserted into the side of the handle 8, and the top of the pull rod 4 is fixedly connected to the handle 8 through the fixing pin 7 to prevent it from falling off.

[0030] Preferably, a bushing 6 is provided at the upper end of the pull rod 4, and the pull rod 4 is fixed to the lower end of the handle 8 after passing through the bushing 6.

[0031] like Figure 3 As shown, the assembly method of the ultra-deep hole spring retainer 10 retainer mounting fixture is as follows: During assembly, first thread the three retaining ring pins 1 into the threaded holes at the lower end of the elastic cone 2, then thread the pull rod 4 into the upper end of the elastic cone 2, insert the housing 3 from the upper end of the pull rod 4, ensuring that the inclined surface 31 of the housing at the lower end of the housing 3 fits against the inclined surface 91 of the cone 2, connect the end cap 5 to the upper end of the housing 3, pass the pull rod 4 through the end cap 5, pass the bushing 6 through the upper end of the pull rod 4, and finally install the handle 8 at the uppermost end of the pull rod 4, and use the fixing pin 7 to fix the handle 8, thus completing the installation of the ultra-deep hole spring retaining ring 10 retaining ring installation fixture.

[0032] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method of installing a spring collar in a deep hole, characterized by, It comprises the following steps: Step S1: Assemble the collar mounting tool, which comprises a housing (3) and a driving mechanism and a collar pin (1) arranged inside the housing (3), the bottom of the housing (3) is open; the driving mechanism comprises a linear driving unit and a radial adjustable unit driven by the linear driving unit and making the lower end contract radially, the top of the radial adjustable unit is provided with a plurality of collar pins (1) in the circumferential direction, the collar pins (1) are used for clamping with the snap spring hole (101) of the spring collar (10), thereby driving the spring collar (10) to move radially; Step S2: Insert the collar pin (1) at the bottom of the radial adjustable unit into the snap spring hole (101) of the spring collar (10); Step S3: Fix the position of the housing (3), then drive the linear driving unit to make the lower end of the radial adjustable unit contract radially, thereby driving the spring collar (10) to contract uniformly through the circumferential collar pin (1); Step S4: When the spring collar (10) is retracted to an outer diameter less than the installation inner diameter of the super-deep hole D, stop the linear drive unit; continue to extend the collar installation tool into the super-deep hole until the front end of the spring collar (10) contacts the installation groove in the super-deep hole; Step S5: Reverse drive the linear driving unit to make the lower end of the radial adjustable unit expand radially, at this time, the spring collar (10) is uniformly loosened until it is in a non-contracted state; then, the spring collar (10) is clamped in the mounting groove, the installation of the ultra-deep hole spring collar (10) is completed, and the collar mounting tool is removed.

2. The method of installing a spring collar in a deep hole according to claim 1, wherein, The lower end of the radial adjustable unit is provided with a plurality of elastic strips in the circumferential direction, the outer side of the radial adjustable unit is sleeved with a sliding sleeve, the sliding sleeve is in sliding connection with the housing (3), and the linear driving unit is used for driving the sliding sleeve to move linearly.

3. The method of claim 1, wherein, The radial adjustable unit comprises: The elastic cone (2) is made of elastic material, the lowermost end is provided with a beveled base (9), the beveled base (9) is provided with a cone bevel (91), the top of the cone bevel (91) is close to the center of the elastic cone (2), the bottom is away from the center of the elastic cone (2), the bottom of the elastic cone (2) is slotted, and the cone bevel (91) of the beveled base (9) and the housing bevel (31) of the bottom of the housing (3) are in contact in the non-working state; the inner surface of the lower end of the housing (3) is provided with a housing bevel (31), and the housing bevel (31) is in contact with the cone bevel (91) of the beveled base (9) in the non-working state; The collar pin (1) is detachably connected to the bottom of the beveled base (9); the outer diameter of the collar pin (1) is matched with the hole diameter of the snap spring hole (101) of the spring collar (10) to be installed.

4. The method of claim 3, wherein, The linear driving unit comprises: The pull rod (4) is detachably connected to the upper end of the elastic cone (2); The housing (3) surrounds the outer side of the pull rod (4); The end cover (5) is fixed to the upper end of the housing (3), and the upper end of the pull rod (4) penetrates the end cover (5), The handle (8) is located at the top of the entire collar mounting tool and is fixedly connected with the top end of the pull rod (4).

5. The method of installing a spring collar in a deep hole according to claim 1, wherein, The outer diameter of the collar mounting tool is less than or equal to the inner diameter of the upper end of the ultra-deep hole.

6. The method of installing a spring collar in a deep hole according to claim 1, wherein, A fixed bushing (6) is arranged between the outer side of the ultra-deep hole part and the housing (3), the fixed bushing (6) is arranged on the outer side of the top of the housing (3), and a clamping groove is arranged between the fixed bushing (6) and the housing (3) corresponding to the ultra-deep hole part.

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