Multi-directional hole hydraulic plug hand precision positioning and pressing device and method

Abstract

This invention provides a manual precision positioning and tightening device and method for a multi-directional hydraulic plug, comprising: a mechanical counter, a locking nut, a push rod, a compression spring, a handle, a pull rod, a push rod, a positioning sleeve, a nut, a buffer spring, and a floating block. The handle has an external thread at its upper end for installing the locking nut and the push rod; a positioning hole in its inner cavity for installing the positioning sleeve and centering the push rod; and an external thread at its lower end for connecting the nut. The locking nut has an internal thread at its upper end for installing the mechanical counter. The push rod has a positioning hole on its upper side wall for installing the pull rod, which slides up and down in a pull rod groove within the handle. The push rod has a vent hole at its lower end to prevent air entrapment during plug installation. The nut has a positioning hole in its inner cavity for installing the floating block. The floating block has a positioning hole in its inner cavity for positioning the push rod and the outer circle of the plug core; and a lower boss on the floating block pre-positions the plug cup hole.

Description

Technical Field

[0001] This invention belongs to the field of precision assembly technology, specifically relating to a manual precision positioning and clamping device and method for a multi-directional hydraulic plug. Background Technology

[0002] like Figure 1 As shown, LEE-type hydraulic plugs are typically pressed in using a hand-operated press, hydraulic press, or hammer. The LEE-type hydraulic plug installation manual specifies a positioning method: Place the pre-installed plug cup and plug core into the mounting hole, and then use a positioning tool to gently push the end face of the plug cup opening so that the front end of the plug head is in close contact with the bottom shoulder of the mounting hole, thereby positioning the plug cup and plug core for proper pressing.

[0003] However, the plug positioning method of LEE-type hydraulic plugs has limitations: 1. The product needs to be secured using positioning tools: Using specialized positioning fixtures can accurately position the plug core while ensuring that the positioning tool is perpendicular to the mounting hole. However, many press-fit plugs have multi-directional holes in their hydraulic housings, making positioning during press-fitting difficult. Positioning with fixtures is too expensive and not easily implemented.

[0004] 2. Hydraulic plugs are generally assembled on-site using a manual pressing method with a press-fitting punch and hammer. For LEE type hydraulic plugs, it is difficult to ensure the perpendicularity of the positioning tool to the mounting hole when using this positioning tool. At the same time, moving the positioning tool will cause the plug core to shift, thus failing to achieve the positioning purpose.

[0005] 3. When pressing in many or even hundreds of hydraulic plugs onto a hydraulic housing, omissions may occur, causing hydraulic leakage during verification and requiring repeated installation and debugging. Positioning tools cannot meet the manual positioning and pressing requirements for multi-directional holes and multi-angle plugs. Summary of the Invention

[0006] This invention provides a manual precision positioning and tightening device and method for multi-directional hydraulic plugs, which solves the problem of skewness during hydraulic plug pressing, resulting in excessive pressing force, causing plug to flip or crack and affecting sealing performance. In a first aspect, this application provides a manual precision positioning and tightening device for a multi-directional hydraulic plug, comprising: a mechanical counter 1, a locking nut 2, a push rod 3, a compression spring 4, a handle 5, a pull rod 6, a push rod 7, a positioning sleeve 8, a nut 9, a buffer spring 10, and a floating block 11, wherein: The handle 5 has an external thread at its upper end for installing the locking nut 2 and the push rod 3. The handle 5 has a positioning hole in its inner cavity for installing the positioning sleeve 8 to center and position the push rod 7. The lower end has an external thread for connecting the nut 9. The locking nut 2 has an internal thread at its upper end for installing the mechanical counter 1. The push rod 7 has a positioning hole on its upper side wall for installing the pull rod 6. The pull rod 6 slides up and down in the pull rod groove inside the handle 5. The lower end of the push rod 7 has a vent hole to prevent air from being trapped during the press-fitting of the plug. The nut 9 has a positioning hole in its inner cavity for installing the floating block 11. The floating block 11 has a positioning hole in its inner cavity to position the push rod 6 and the outer circle of the plug core. The lower boss of the floating block 11 pre-positions the plug cup hole. A compression spring 4 is installed between the mechanical counter 1 and the push rod 7, and a buffer spring 10 is installed between the push rod 7 and the floating block 11.

[0007] Specifically, the push rod 3 is screw-shaped, with one end connected to the internal thread of the push rod 7, and the other end pressing against the contact of the mechanical counter 1, used to adjust the compression stroke of the compression spring 4 and trigger the counting function of the mechanical counter 1.

[0008] Specifically, the mechanical counter 1 includes a ratchet and pawl mechanism, a counting wheel group, a carry mechanism, a positioning and anti-reverse mechanism, and a housing, and realizes the internal counting function through the reciprocating linear motion of the contacts.

[0009] Specifically, the floating block 11 is a stepped shaft shape. The upper outer circle is fitted with the positioning hole of the nut 9 with a small clearance, and the lower boss is fitted with the plugging cup hole of the shell for centering and positioning of the plugging cup.

[0010] Specifically, the locking nut 2, push rod 3, handle 5, pull rod 6, and nut 9 are made of 40Cr alloy structural steel, with a hardness of HRC40-45 after heat treatment; the push rod 7 and floating block 11 are made of Cr12MoV alloy tool steel, with a hardness of HRC58-62 after heat treatment, ensuring high wear resistance and impact toughness.

[0011] Specifically, the handle 5 has a pull rod groove on one side, and the pull rod groove has N push rod positions, where N is greater than or equal to 2.

[0012] Specifically, by pulling the push rod 7 to compress the spring 4, the push rod 7 is released and impacts the plug core, allowing more of the plug core to enter the plug cup hole, achieving a stable state and realizing the impact positioning of the hydraulic plug.

[0013] Specifically, by setting the floating block 11 of the plug cup, the hydraulic plug positioning device and the plug cup are positioned synchronously.

[0014] Specifically, a mechanical counter 1 is installed on the upper end of the push rod. When the push rod is pulled manually, the push rod compresses the spring and pushes the counter top rod with the upper end face of the push rod to achieve one count and complete one positioning press-fit, that is, synchronous counting after press-fit.

[0015] Secondly, this application provides a method for manually and precisely positioning and tightening a multi-directional hydraulic plug, wherein the method is implemented using the aforementioned manual and precisely positioning and tightening device for a multi-directional hydraulic plug, and the method includes: Step 1: Before use, manually pull up lever 6 to move push rod 7 upward to the desired position, simultaneously compressing and counting the compression spring 4. Step 2: Place the pre-installed plug cup into the housing mounting hole, hold the device by hand, and insert the plug core into the positioning hole of the floating block 11. The boss of the floating block 11 is pre-positioned in the center of the plug cup under the action of the buffer spring 10, while ensuring that the lower end face of the nut 9 is close to the upper end face of the housing mounting hole. Step 3: Use your finger to pull the lever 6. Under the action of the compressed spring 4, the push rod 7 is forced to impact the plug core, embedding the plug core into the plug cup to form a tight position, so as to facilitate correct pressing; Step 4: Remove the manual precision positioning and tightening device for the multi-directional hydraulic plug to complete the positioning and pre-tightening of the plug core; Step 5: By adjusting the relative positions of the locking nut 2 and the push rod 3, the impact force requirements of different plug specifications can be met; Step 6: When pressing a plug of another specification, the positioning and pressing can be achieved by replacing the push rod 7, nut 10, and floating block 11.

[0016] In summary, this invention provides a manual precision positioning and pressing device and method for multi-directional hydraulic plugs, specifically a LEE-type plug precision positioning device. This invention uses the upper end face of the mounting hole for positioning, a spring-driven floating block to press the plug cup, and manual pushing of the push rod compresses the spring and releases the push rod to impact the end face of the plug core, pressing the plug core firmly into the plug cup. This ensures that the positioned plug core will not deviate after the tooling is removed. A mechanical counter is designed at the top of the device to synchronously record the number of pressing operations. This invention effectively solves the problems of difficulty in positioning LEE-type plugs during manual pressing, plug core deviation after removing the positioning tool, excessive pressing force, and cracking and deformation of the plug cup. It achieves a 100% pass rate for LEE-type plug pressing, avoiding the losses from scrapped plugs and housings due to manual pressing. This invention uses manual precision positioning of plugs for multi-directional hydraulic housing holes, replacing the need for customized positioning fixtures and pressing equipment during machine pressing, resulting in lower processing costs and higher processing efficiency. Attached Figure Description

[0017] Figure 1 A schematic diagram illustrating the press-fitting principle of a LEE-type plug; Figure 2 A schematic diagram of a manual precision positioning and clamping device for a multi-directional hydraulic plug provided for the implementation of this invention; Figure 3A partially enlarged view of the manual precision positioning and clamping device provided for the implementation of this invention.

[0018] Figure 4 The handle is shown in front / side view for implementation of the present invention.

[0019] Figure 5 A schematic diagram illustrating the clamping and positioning of a plug cup for the purpose of implementing this invention; Figure 6 A schematic diagram illustrating the state after the impact method stabilizes the plug core positioning, provided for the implementation of this invention; Explanation of reference numerals in the attached figures: 1-Mechanical counter, 2-Locking nut, 3-Push rod, 4-Compression spring, 5-Handle, 6-Pull rod, 7-Push rod, 8-Positioning sleeve, 9-Nut, 10-Buffer spring, 11-Floating block. Detailed Implementation

[0020] The present application will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0021] Example 1 like Figure 2-3 As shown, this invention provides a manual precision positioning and tightening device for a multi-directional hydraulic plug, comprising a mechanical counter 1, a locking nut 2, a push rod 3, a compression spring 4, a handle 5, a pull rod 6, a push rod 7, a positioning sleeve 8, a nut 9, a buffer spring 10, and a floating block 11, wherein: The handle 5 has an external thread at its upper end for installing the locking nut 2 and the push rod 3. The handle 5 has a positioning hole in its inner cavity for installing the positioning sleeve 8 to center and position the push rod 7. The lower end has an external thread for connecting the nut 9. The locking nut 2 has an internal thread at its upper end for installing the mechanical counter 1. The push rod 7 has a positioning hole on its upper side wall for installing the pull rod 6. The pull rod 6 slides up and down in the pull rod groove inside the handle 5. The lower end of the push rod 7 has a vent hole to prevent air entrapment during plug installation. The nut 9 has a positioning hole in its inner cavity for installing the floating block 11. The floating block 11 has a positioning hole in its inner cavity for positioning the push rod 6 and the outer circle of the plug core. The lower boss of the floating block 11 pre-positions the plug cup hole. A compression spring 4 is installed between the mechanical counter 1 and the push rod 7, and a buffer spring 10 is installed between the push rod 7 and the floating block 11.

[0022] Specifically, the push rod 3 is screw-shaped, with one end connected to the internal thread of the push rod 7, and the other end pressing against the contact of the mechanical counter 1, used to adjust the compression stroke of the compression spring 4 and trigger the counting function of the mechanical counter 1.

[0023] Specifically, the mechanical counter 1 includes a ratchet and pawl mechanism, a counting wheel group, a carry mechanism, a positioning / anti-reverse mechanism, and a housing, and realizes the internal counting function through the reciprocating linear motion of the contacts.

[0024] Specifically, the floating block 11 is a stepped shaft shape. The upper outer circle is fitted with the positioning hole of the nut 9 with a small clearance, and the lower boss is fitted with the plugging cup hole of the shell for centering and positioning of the plugging cup.

[0025] Specifically, the locking nut 2, push rod 3, handle 5, pull rod 6, and nut 9 are made of 40Cr alloy structural steel, with a hardness of HRC40-45 after heat treatment; the push rod 7 and floating block 11 are made of Cr12MoV alloy tool steel, with a hardness of HRC58-62 after heat treatment, ensuring high wear resistance and impact toughness.

[0026] Specifically, such as Figure 4 As shown, the handle 5 has a pull rod groove on one side, and the pull rod groove has N push rod positions, where N is greater than or equal to 2, to meet the precise control of impact force for different sizes of plugs. For example, a two-position push rod can be set to adjust the impact force. When the push rod is pulled manually, the impact force is sufficient to stably embed the plug without causing the device to tilt or move due to vibration.

[0027] As can be seen, the present invention clarifies that the push rod is manually pulled to the appropriate position, and each position corresponds to different specifications of pressing. The spring force of the push rod at this position can make the plug core stably embedded after impacting the push rod without causing the device to tilt or move due to vibration.

[0028] Specifically, by pulling the push rod 7 to compress the spring 4, the push rod 7 is released and impacts the plug core, allowing more of the plug core to enter the plug cup hole, achieving a stable state and realizing the impact positioning of the hydraulic plug.

[0029] It should be added that the problems of difficulty in positioning, core deviation after the positioning tool is removed, excessive pressure on the plug, cracking and deformation of the plug cup have been effectively solved.

[0030] Specifically, by setting the floating block 11 of the plug cup, the hydraulic plug positioning device and the plug cup are positioned synchronously, solving the over-positioning problem that occurs when the positioning device and the plug cup are positioned synchronously. This ensures that the plug cup can fit tightly against the chamfer at the bottom of the hole during the pressing process, thus ensuring a correct sealing state.

[0031] Specifically, a mechanical counter is installed on the upper end of the push rod. When the push rod is pulled manually, the push rod compresses the spring, and the upper end of the push rod pushes the counter rod to achieve one count and complete one positioning press-fit, that is, synchronous counting after press-fit.

[0032] It should be added that after all plugs are installed, check that the number of mounting holes on the hydraulic housing is the same as the count on this device to ensure that there are no omissions in the press-fitting process.

[0033] Specifically, vent holes and vent grooves are provided on the handle, push rod, and positioning sleeve. The vent hole in the center of the push rod is connected to the inner hole of the plug. The air in the plug mounting hole is vented through the side vent hole to avoid problems such as incomplete pressing or uneven force due to air retention, thereby improving the reliability of plug pressing.

[0034] Specifically, the push rod, floating block, and nut are all modular, allowing for quick replacement according to the plug specifications; by adjusting the relative positions of the push rod and locking nut, the impact force requirements of different plug specifications can be met.

[0035] Example 2 This invention provides a method for manually and precisely positioning and tightening a multi-directional hydraulic plug, which is implemented using the manual and precisely positioning and tightening device for a multi-directional hydraulic plug provided in Embodiment 1 above. The method includes: Step 1: Before use, manually pull up lever 6 to move push rod 7 upward to the desired position, simultaneously compressing and counting the compression spring 4. Step 2: Place the pre-installed plug cup into the housing mounting hole, hold the device by hand, and insert the plug core into the positioning hole of the floating block 11. The boss of the floating block 11 is pre-positioned at the center of the plug cup under the action of the buffer spring 10, while ensuring that the lower end face of the nut 9 is close to the upper end face of the housing mounting hole.

[0036] like Figure 5 As shown, a buffer spring pushes a push rod to press the plug cup tightly, and a floating block is designed to change the repetitive positioning to floating positioning. This allows the plug cup to be pushed simultaneously while ensuring that the positioning device is in contact with the upper surface of the mounting hole, so that the chamfer at the bottom of the plug cup is in contact with the conical surface of the mounting hole, ensuring the correct installation of the plug and achieving the pressing and positioning of the plug cup.

[0037] Step 3: Use your finger to turn the lever 6. The compression spring 4 forces the push rod 7 to impact the plug core, embedding the plug core into the plug cup to form a tight position, so as to facilitate correct pressing.

[0038] It should be noted that by using your finger to move the lever 6, the push rod 7 is moved upward to the desired position, the plug is inserted, and the lever 6 is pushed to the lever groove position. Under the action of the compression spring 4, the push rod 7 is forced to impact the plug, thus completing the tight positioning of the plug.

[0039] like Figure 6 As shown, the device's inner hole mates with the plug core to ensure the plug core is vertical; then, the push rod is manually pulled to compress the spring, and the push rod is released to impact the end face of the plug core, pressing the plug core tightly into the plug cup. This ensures that the positioned plug core will not deviate after the tooling is removed. By using the impact positioning method, the contact area of ​​the plug core's conical surface is increased, thus preventing the plug core from failing to maintain its position after the tooling is removed.

[0040] Step 4: Remove the manual precision positioning and tightening device for the multi-directional hydraulic plug to complete the positioning and pre-tightening of the plug core.

[0041] Step 5: By adjusting the relative positions of the locking nut 2 and the push rod 3, the impact force requirements of different plug specifications can be met.

[0042] Step 6: When pressing a plug of another specification, the positioning and pressing can be achieved by replacing the push rod 7, nut 9, and floating block 11.

[0043] In summary, this invention provides a manual precision positioning and pressing device and method for multi-directional hydraulic plugs. Addressing the challenges of ensuring the manual verticality of the plug positioning fixture and the inability to maintain the plug's state after removing the fixture, this manual precision positioning device for plugs was designed. This invention uses the upper end face of the mounting hole for positioning. The positioning device uses a spring to push the pressing block to press the plug cup, solving the problem of repeated positioning. The inner hole of the fixture mates with the plug, ensuring the plug's verticality. Manually pushing the push rod compresses the spring, releasing the push rod to impact the end face of the plug, pressing the plug into the plug cup. This ensures that the positioned plug will not deviate after removing the fixture, solving the problem of the plug's state not being maintained after fixture removal. The push rod has two positions, generating different impact forces to accommodate different plug specifications. A counter is used to solve the problem of missed pressing of hydraulic plugs. By designing a positioning device for hydraulic plugs, the problem of inaccurate plug positioning during manual pressing of hydraulic plugs is solved.

[0044] The above description merely illustrates the embodiments of this application, and while it is quite specific and detailed, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Furthermore, any parts not detailed in this application are conventional techniques.

Claims

1. A manual precision positioning and tightening device for multi-directional hydraulic plugs, characterized in that, include: The components include a mechanical counter (1), a locking nut (2), a push rod (3), a compression spring (4), a handle (5), a pull rod (6), a push rod (7), a positioning sleeve (8), a nut (9), a buffer spring (10), and a floating block (11), wherein: The handle (5) has an external thread at its upper end for installing the locking nut (2) and the push rod (3). The handle 5 has a positioning hole in its inner cavity for installing the positioning sleeve (8) to center and position the push rod (7). The lower end has an external thread for connecting the nut (9). The locking nut (2) has an internal thread at its upper end for installing the mechanical counter (1). The push rod (7) has a positioning hole on its upper side wall for installing the pull rod (6). The pull rod (6) moves up and down in the pull rod groove provided in the handle (5). The sliding push rod (7) has an exhaust hole at its lower end to prevent air from being trapped during the press-fitting of the plug; the nut (9) has a positioning hole in its inner cavity for installing the floating block (11); the floating block (11) has a positioning hole in its inner cavity to position the push rod (6) and the outer circle of the plug core, and the lower end boss of the floating block (11) pre-positions the plug cup hole; a compression spring (4) is installed between the mechanical counter (1) and the push rod (7), and a buffer spring (10) is installed between the push rod (7) and the floating block (11).

2. The apparatus according to claim 1, characterized in that, The push rod (3) is in the shape of a screw. One end is connected to the internal thread of the push rod (7), and the other end is pressed against the contact of the mechanical counter (1). It is used to adjust the compression stroke of the compression spring (4) and trigger the counting function of the mechanical counter (1).

3. The apparatus according to claim 1, characterized in that, The mechanical counter (1) includes a ratchet and pawl mechanism, a counting wheel group, a carry mechanism, a positioning and anti-reverse mechanism and a housing. The internal counting function is realized through the reciprocating linear motion of the contacts.

4. The apparatus according to claim 1, characterized in that, The floating block (11) is a stepped shaft shape. The upper outer circle is fitted with the nut (9) positioning hole with a small clearance. The lower boss is fitted with the shell plugging cup hole for centering and positioning of the plugging cup.

5. The apparatus according to claim 1, characterized in that, The hardness of the locking nut (2), top rod (3), handle (5), pull rod (6), and nut (9) is HRC40-45; the hardness of the push rod (7) and floating block (11) is HRC58-62.

6. The apparatus according to claim 1, characterized in that, The handle (5) has a pull rod groove on one side, and the pull rod groove has N push rod positions, where N is greater than or equal to 2.

7. The apparatus according to claim 1, characterized in that, By pulling the push rod (7) to compress the spring (4), the push rod (7) is released and impacts the plug core, allowing more of the plug core to enter the plug cup hole and reach a stable state, thus achieving the impact positioning of the hydraulic plug.

8. The apparatus according to claim 1, characterized in that, By setting a floating block (11) for the plug cup, the hydraulic plug positioning device and the plug cup are positioned synchronously.

9. The apparatus according to claim 1, characterized in that, A mechanical counter (1) is installed on the upper end of the push rod. The push rod is manually pulled, the push rod compresses the spring, and the upper end face of the push rod pushes the counter rod to achieve one count and complete one positioning press-fit, that is, synchronous counting after press-fit.

10. A method for manually and precisely positioning and tightening a multi-directional hydraulic plug, characterized in that, The method is implemented using the manual precision positioning and tightening device for the multi-directional hydraulic plug as described in any one of claims 1 to 9, and the method includes: Step 1: Before use, manually pull up the lever (6) to move the push rod (7) upward to the desired position, and simultaneously compress the compression spring (4) and complete the counting function; Step 2: Place the pre-installed plug cup into the housing mounting hole, hold the device with your hand, and insert the plug core into the positioning hole of the floating block (11). The boss of the floating block (11) is pre-positioned at the center of the plug cup under the action of the buffer spring (10), while ensuring that the lower end face of the nut (9) is close to the upper end face of the housing mounting hole. Step 3: Use your finger to turn the lever (6), and under the action of the compressed spring (4), the push rod (7) is forced to impact the plug core, embedding the plug core into the plug cup to form a tight position, so as to facilitate correct pressing; Step 4: Remove the manual precision positioning and tightening device for the multi-directional hydraulic plug to complete the positioning and pre-tightening of the plug core; Step 5: By adjusting the relative positions of the locking nut (2) and the push rod (3), the impact force requirements of different specifications of plugs can be met; Step 6: When pressing a plug of another specification, the positioning and pressing are performed by replacing the push rod (7), nut (9), and floating block (11).

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