Auxiliary assembly jig for nitrogen spring

Abstract

The utility model relates to the technical field of machining, manufacturing and assembling, in particular to a nitrogen spring auxiliary assembling jig which comprises a lead screw, a fixed end support, a movable end support, a guide shaft and a lead screw nut, one end of the guide shaft is fixedly connected to the fixed end support, and the movable end support can be installed on the guide shaft in a linear sliding mode along the guide shaft. One end of the lead screw is rotatably installed on the fixed end support, the other end of the lead screw is provided with the lead screw nut, the lead screw nut is fixedly connected with the movable end support, and the two ends of the nitrogen spring are fixedly connected to the fixed end support and the movable end support respectively. According to the auxiliary assembling jig for the nitrogen spring, the hand wheel is rotated to drive the lead screw to enable the movable end support to move towards the fixed end support along the guide shaft, compression assembling of the nitrogen spring is achieved, the assembling efficiency is greatly improved, and the labor cost is reduced; and meanwhile, the operation risk is reduced, personal injury is completely eradicated, the repair time caused by equipment surface scratch is shortened, and the product delivery progress is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing, manufacturing and assembly technology, and specifically to a nitrogen spring-assisted assembly fixture. Background Technology

[0002] Nitrogen springs are common and critical components in the assembly of some large equipment. However, without the use of specialized assembly fixtures, the assembly of nitrogen springs faces numerous challenges and risks.

[0003] Traditional nitrogen spring assembly typically requires 2-3 people working together to manually compress the nitrogen spring before assembling it into its designated position on the equipment. This purely manual operation method poses serious safety hazards. Because nitrogen springs possess significant elastic potential energy, improper operation during the compression process can easily cause the spring to spring back, potentially injuring the operator and posing a direct threat to their personal safety.

[0004] Furthermore, this manual assembly method can potentially damage the equipment surface. During the tightening of the nitrogen springs, uneven force or slippage can easily scratch the surface. Once scratches appear, significant time and effort are required for repairs, which not only extends product delivery times and impacts production schedules but also increases production costs.

[0005] From an assembly efficiency perspective, manual assembly of nitrogen springs is extremely inefficient. The entire assembly process heavily relies on manual operation, which not only consumes a large amount of human resources but also results in slow assembly speed, failing to meet the needs of large-scale production and severely restricting capacity expansion.

[0006] In view of the above problems, it is urgent to develop a nitrogen spring-assisted assembly fixture. By using this fixture, the probability of rework caused by improper nitrogen spring assembly can be effectively reduced, assembly efficiency can be significantly improved, personal injury accidents can be eliminated, thereby improving production efficiency and product quality. Utility Model Content

[0007] To address the aforementioned issues, this utility model provides a nitrogen spring auxiliary assembly fixture. This fixture uses a handwheel to drive a lead screw, causing the movable end support to move along the guide axis to the fixed end support, thereby achieving the compression assembly of the nitrogen spring. This significantly improves assembly efficiency and reduces labor costs. Simultaneously, it reduces operational risks, eliminates personal injury, reduces the time required for rework due to scratches on the equipment surface, and ensures product delivery schedules.

[0008] The technical solution of this utility model is as follows:

[0009] A nitrogen spring-assisted assembly fixture includes a lead screw, a fixed end support, a movable end support, a guide shaft, and a lead screw nut. One end of the guide shaft is fixedly connected to the fixed end support. The movable end support is slidably mounted on the guide shaft along the guide shaft. One end of the lead screw is rotatably mounted on the fixed end support. The other end of the lead screw is fitted with a lead screw nut, which is fixedly connected to the movable end support. Both ends of the nitrogen spring are fixedly connected to the fixed end support and the movable end support, respectively.

[0010] A handwheel is installed at one end of the lead screw on the side of the fixed end support.

[0011] Handles are fixedly installed on both the fixed end support and the movable end support.

[0012] The lead screw is mounted on a fixed end support via ball bearings.

[0013] A bushing is fixedly installed on the fixed end support, and the bushing is provided with a connection structure that mates with the telescopic end of the nitrogen spring.

[0014] The fixed end of the nitrogen spring rests against the side of the movable end support.

[0015] Limit caps are provided at the ends of the lead screw and guide shaft on the side of the movable end support.

[0016] The movable end support is mounted on the guide shaft via a linear bearing.

[0017] The bushing is made of rigid plastic.

[0018] The movable end support is equipped with a support buckle, and the fixed end of the nitrogen spring rests against the support buckle.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. This utility model discloses a nitrogen spring auxiliary assembly fixture. The nitrogen spring auxiliary assembly fixture drives the lead screw by rotating the handwheel, so that the movable end support moves along the guide axis to the fixed end support, thereby realizing the compression assembly of the nitrogen spring. Compared with the traditional manual assembly method, it greatly improves the assembly efficiency and reduces labor costs.

[0021] 2. This utility model discloses a nitrogen spring-assisted assembly fixture, which reduces operational risks. In traditional nitrogen spring assembly, 2-3 people work together to manually tighten the spring, which carries the risk of injury from the spring rebounding and may also scratch the equipment surface. Using this fixture avoids such risks, eliminates personal injury, and reduces the time required for repairs due to scratches on the equipment surface, thus ensuring product delivery schedule.

[0022] 3. The present invention discloses a nitrogen spring-assisted assembly fixture, which uses ball bearings and linear bearings to make the lead screw and guide shaft move more smoothly inside the fixed end support and the movable end support, reduce the friction between the components, ensure the rotation accuracy, and thus improve the overall service life of the fixture.

[0023] 4. This utility model discloses a nitrogen spring auxiliary assembly fixture, which can prevent the nitrogen spring from flying off. The bushing adopts a spherical contour design to cooperate with the telescopic end of the nitrogen spring. The movable end support is equipped with a support buckle, and the fixed end of the nitrogen spring is pressed against the support buckle, which can prevent the nitrogen spring from flying off when squeezed, thus ensuring the safety of the assembly process.

[0024] 5. The present invention discloses a nitrogen spring auxiliary assembly fixture, which uses the force generated by rotating the handwheel to drive the lead screw to assemble the nitrogen spring. The operator does not need to apply a large amount of manpower to tighten the nitrogen spring, thus achieving the effect of saving time and effort and achieving twice the result with half the effort.

[0025] 6. This utility model discloses a nitrogen spring auxiliary assembly fixture, which can realize the assembly of nitrogen springs with a length of less than 900 mm, and can be widely used in the nitrogen spring assembly work of parts, components and equipment equipped with nitrogen springs in various industries.

[0026] 7. The present invention discloses a nitrogen spring-assisted assembly fixture, which has a simple structure, is easy to process, has low cost and high efficiency. The fixture has a simple single-piece structure and a standard part modification station, which is easy to process and manufacture. While achieving efficient assembly function, it reduces manufacturing cost and achieves the goal of low cost and high efficiency. Attached Figure Description

[0027] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0028] In the attached diagram:

[0029] Figure 1 This is a three-dimensional exploded view of a nitrogen spring-assisted assembly fixture according to an embodiment of the present invention;

[0030] Figure 2 This is a cross-sectional schematic diagram of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model;

[0031] Figure 3 for Figure 2 Enlarged view at point A in the middle;

[0032] Figure 4 for Figure 2 Enlarged view at point B;

[0033] Figure 5 This is a three-dimensional structural diagram of the lead screw of a nitrogen spring-assisted assembly fixture according to an embodiment of the present invention.

[0034] Figure 6 This is a three-dimensional structural diagram of the fixed end support of a nitrogen spring-assisted assembly fixture according to an embodiment of the present invention. Figure 1 ;

[0035] Figure 7 This is a three-dimensional structural diagram of the fixed end support of a nitrogen spring-assisted assembly fixture according to an embodiment of the present invention. Figure 2 ;

[0036] Figure 8 This is a three-dimensional structural schematic diagram of the bushing of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model.

[0037] Figure 9 This is a three-dimensional structural diagram of the movable end support of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model.

[0038] Figure 10 This is a three-dimensional structural diagram of a limiting cap for a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model.

[0039] Figure 11 This is a three-dimensional structural diagram of a support buckle of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model.

[0040] Figure 12 This is a three-dimensional structural diagram of the handle of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model.

[0041] Figure 13 This is a three-dimensional structural diagram of a pad block for a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model.

[0042] Figure 14 This is a three-dimensional structural diagram of the guide shaft of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model.

[0043] Figure 15 This is a three-dimensional structural diagram of the stop block of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model;

[0044] Figure 16 This is a three-dimensional structural diagram of a linear bearing in a nitrogen spring-assisted assembly fixture according to an embodiment of the present invention.

[0045] Figure 17 This is a three-dimensional structural diagram of the lead screw nut of a nitrogen spring-assisted assembly fixture according to an embodiment of the present invention.

[0046] Figure 18 This is a three-dimensional structural diagram of the handwheel of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model;

[0047] Figure 19 This is a three-dimensional structural diagram of a ball bearing in a nitrogen spring-assisted assembly fixture according to an embodiment of the present invention.

[0048] Figure 20 This is a three-dimensional structural diagram of a flat key of a nitrogen spring-assisted assembly fixture according to an embodiment of the present utility model.

[0049] The components represented by the various reference numerals in the diagram are:

[0050] This utility model includes: 1. Lead screw, 101. Threaded hole A, 102. Threaded post, 103. Keyway; 2. Fixed end support, 201. Fine hole A, 202. Countersunk hole A, 203. Threaded hole B, 204. Threaded hole C, 205. Threaded hole D; 3. Bushing, 301. Spherical surface, 302. Threaded hole E; 4. Movable end support, 401. Countersunk hole B, 402. Semi-waisted groove, 403. Waisted hole, 40 4. Precision hole B, 405. Precision hole C, 406. Threaded hole F, 5. Limit cap, 501. Plain hole A, 6. Support buckle, 601. Waist-shaped column, 7. Handle, 701. Plain hole B, 8. Pad, 801. Plain hole C, 9. Guide shaft, 901. Threaded hole G, 10. Stop block, 1001. Threaded hole H, 11. Linear bearing, 12. Lead screw nut, 13. Handwheel, 14. Ball bearing, 15. Flat key. Detailed Implementation

[0051] like Figures 1 to 4 As shown, the nitrogen spring auxiliary assembly fixture includes a modified lead screw 1, a fixed end support 2, a bushing 3, a movable end support 4, a limit cap 5, a support buckle 6, a handle 7, a pad 8, a modified guide shaft 9, a stop block 10, a linear bearing 11, a trapezoidal lead screw nut 12, a handwheel 13, a ball bearing 14, and a flat key 15. One end of the guide shaft 9 is fixedly connected to the fixed end support 2. The movable end support 4 can slide linearly along the guide shaft 9 and is mounted on the guide shaft 9. One end of the lead screw 1 can be rotatably mounted on the fixed end support 2. The other end of the lead screw 1 is mounted with a lead screw nut 12, which is fixedly connected to the movable end support 4. The two ends of the nitrogen spring are respectively fixedly connected to the fixed end support 2 and the movable end support 4.

[0052] In this embodiment, the nitrogen spring is model A4A4-4N-207-567-002 800N and brand name is Bansbach.

[0053] In this embodiment, the lead screw 1 is a modified lead screw of model LHP17-D22-L1040-T54-S30-Q15-E12 (brand: Yiheda), made of 45# steel. It is used to drive the movable end support 4 towards the fixed end support 2, thereby compressing the nitrogen spring and achieving the purpose of installing the nitrogen spring. Figure 5 As shown, one end of the lead screw 1 is provided with a threaded hole A101 for installing the limit cap 5, and the other end is provided with a threaded post 102. A keyway 103 is machined on the lead screw inside the threaded post 102 for installing a flat key 15, thereby preventing the handwheel 13 from rotating.

[0054] Flat key 15 Figure 20 As shown, in this embodiment, the flat key 15 is model E-BLC01-B4-L10 (brand: Yiheda), and for ease of installation, it is clearance-fitted with the keyway 103.

[0055] The fixed end support 2 is made of AL6061 material, such as Figure 6 and Figure 7 As shown, the fixed end support 2 is the fixed end of the fixture, and it is machined with a precision hole A201 for assembling the linear bearing 11 and the ball bearing 14. The linear bearing 11 and the ball bearing 14 are as follows: Figure 16 and Figure 19 As shown; the top is machined with a square groove for installing bushing 3, and the side of the square groove is machined with a countersunk hole A202 for fitting an internal hex bolt to fix bushing 3; the side is machined with a threaded hole C204 for fitting an internal hex bolt to fix handle 7; on both sides of the precision hole A201 for installing linear bearing 11, threaded holes B203 and D205 are machined respectively for installing linear bearing 11 and stop 10.

[0056] Bushing 3 is made of Teflon, such as Figure 8 As shown, a spherical surface 301 is machined to mate with the nitrogen spring in this embodiment. It should be noted that different nitrogen springs have different end connection structures. The structure here should be designed according to the specific structure of the nitrogen spring to provide a corresponding mating structure. The purpose is to fix one end of the nitrogen spring. The spherical surface 301 in this embodiment is only used as an example. A threaded hole E302 is machined to mate with the countersunk hole A202 for fixing to the fixed end support 2 with an internal hex bolt. The bushing 3 is made of hard plastic to prevent friction damage to one end of the nitrogen spring to a certain extent.

[0057] The movable end support 4 is made of AL6061 stainless steel. Its main function is to modify the lead screw 1 to move towards the fixed end support 2, compressing the nitrogen spring and achieving the purpose of installing the nitrogen spring. Figure 9As shown, precision holes B404 and C405 are machined for assembling the trapezoidal lead screw nut 12 and the linear bearing 11, respectively; countersunk hole B401 is machined; threaded hole F406 is machined; semi-waist groove 402 and waist hole 403 are machined for installing the end of the support buckle 6 to limit the compression of the nitrogen spring.

[0058] The limit cap 5 is made of AL6061, and its main function is to limit the movable end support 4 and prevent the movable end support 4 from disengaging from the modified lead screw 1; for example Figure 10 As shown, a hole A501 is machined to fit an internal hex bolt and fix it to the modified lead screw 1 and the modified guide shaft 9.

[0059] The support clip 6 is made of AL6061, and its main function is to fix one end of the nitrogen spring compression mechanism; for example... Figure 11 As shown, the machined features a waist-shaped column 601, which can be inserted into the waist-shaped hole 403 of the movable end support 4, so as to fix it on the movable end support 4, thereby achieving the purpose of fixing the compressed end of the nitrogen spring.

[0060] Handle 7 is made of AL6061 material, such as Figure 12 As shown, the handle 7 has a light hole B701 machined on it. The two handles are fixed to the fixed end support 2 and the movable end support 4 respectively with the help of hexagon socket bolts, making the tooling easier to move.

[0061] The pad 8 is made of AL6061 stainless steel, and its main function is to prevent interference between the handwheel 13 and the stop block 10 and the internal hex bolt of the handle. Figure 13 As shown, C801 apertures are machined.

[0062] The guide shaft 9 is made of 45# steel and is modified from the guide shaft of model SAD11-D16-L980 (brand name Yiheda). It mainly serves as a guide and has threaded holes G901 at both ends for use with internal hex bolts to fix the limit cap 5 and the stop block 10.

[0063] Block 10 is made of AL6061 material, such as Figure 15 As shown, two small smooth holes or threaded holes H1001 are machined to fit into the socket head cap screws and fix it to the fixed end support 2. One large smooth hole or threaded hole H1001 is machined to fit into the socket head cap screws and fix it to the modified guide shaft 9. Its main function is to fix the guide shaft and prevent the guide shaft from detaching from the fixed end support 2.

[0064] The linear bearing 11 is a standard part. In this embodiment, the brand is Yiheda and the model is LME73-d16. The two linear bearings 11 are respectively installed on the fixed end support 2 and the movable end support 4, so that the movable end support 4 moves more smoothly to the fixed end support 2.

[0065] The lead screw nut 12 is a standard part. In this embodiment, a trapezoidal lead screw nut with the brand name Yiheda and the model name LJL22-d22 is selected and installed on the movable end support 4. The internal thread specification corresponds to the external thread specification of the modified lead screw 1, which plays the role of driving the movable end support 4 to move towards the fixed end support 2.

[0066] Handwheel 13 is a standard part, such as Figure 18 As shown, in this embodiment, a handwheel of brand name Yiheda and model name HAM31-D100 is selected. Rotating the handwheel drives the lead screw 1 to move the movable end support 4 towards the fixed end support 2.

[0067] Ball bearing 14 is a standard part. In this embodiment, a ball bearing of brand name Yiheda and model number BBN3302 is selected. Figure 19 As shown, two ball bearings 14 are respectively mounted on both sides of the fixed end support 2, making the modified lead screw 1 rotate more smoothly.

[0068] The flat key 15 is a standard part, such as Figure 20 As shown, in this embodiment, a flat key of brand Yiheda and model E-BLC01-B4-L10 is selected and assembled in the keyway of the modified lead screw 1 to fix the handwheel and prevent it from rotating.

[0069] The installation and use process of this nitrogen spring-assisted assembly fixture is as follows:

[0070] Bushing installation: The Teflon bushing 3 is fixed to the AL6061 fixed end support 2 using hexagon socket bolts through its machined threaded hole features. The fixed end support 2 has countersunk holes for the hexagon socket bolts to fix the bushing 3. The bushing 3 has spherical features that mate with the nitrogen spring, which serves to fix one end of the nitrogen spring, and its hard plastic material prevents friction damage to one end of the nitrogen spring to a certain extent.

[0071] Ball bearing installation: Install the two standard ball bearings 14 on both sides of the fixed end support 2 respectively; the fixed end support 2 is machined with precision holes for assembling the ball bearings 14, so that the modified lead screw 1 rotates more smoothly.

[0072] Linear bearing installation: A standard linear bearing 11 is installed on the fixed end support 2; the fixed end support 2 is machined with precision holes to assemble the linear bearing 11, making the movement of the movable end support 4 towards the fixed end support 2 smoother.

[0073] Stop block installation: The stop block 10, made of AL6061 material, is initially fixed to the fixed end support 2 using internal hex bolts through the two small light holes it has machined; then, it is fixed to the modified guide shaft 9 using internal hex bolts through the one large light hole it has machined; the main function of the stop block 10 is to fix the modified guide shaft 9 and prevent the modified guide shaft 9 from detaching from the fixed end support 2.

[0074] Trapezoidal screw nut installation: The trapezoidal screw nut 12 of the standard part is installed on the movable end support 4 made of AL6061 material, with its internal thread specification corresponding to the external thread specification of the modified screw 1. The movable end support 4 is machined with precision holes for assembling the trapezoidal screw nut 12, which drives the movable end support 4 to move towards the fixed end support 2.

[0075] Linear bearing installation: Install another standard linear bearing 11 onto the movable end support 4; the movable end support 4 is machined with precision holes to assemble the linear bearing 11, making the movement of the movable end support 4 towards the fixed end support 2 smoother.

[0076] Modified lead screw installation: Modified lead screw 1, made of 45# steel and modified from a standard M22 lead screw with one end in two stages, passes through the fixed end support 2 and the movable end support 4 respectively; the modified lead screw 1 has a keyway feature machined on it for mounting a flat key 15; the AL6061 material pad 8 and the standard handwheel 13 are passed through the modified end of the modified lead screw 1, and the handwheel 13 is fixed to the modified lead screw 1 with the nut and the flat key 15 to prevent the handwheel 13 from rotating; the flat key 15 serves to fix the handwheel 13.

[0077] Modified guide shaft installation: The modified guide shaft 9, made of 45# steel and modified from the standard guide shaft, passes through the fixed end support 2 and the movable end support 4 respectively; the modified guide shaft 9 is machined with threaded holes to fit the internal hex bolts to fix the limit cap 5 and the stop block 10.

[0078] The limit cap 5, made of AL6061, is fixed to the ends of the modified lead screw 1 and the modified guide shaft 9 on the movable end support 4 by using hexagonal bolts through the machined optical hole features, to prevent the movable end support 4 from detaching from the modified lead screw 1 and the modified guide shaft 9.

[0079] Two handles 7 made of AL6061 are fixed to the fixed end support 2 and the movable end support 4 with internal hex bolts through their machined threaded holes, making the tooling easier to move.

[0080] Place the nitrogen spring to be assembled in the position that matches the fixture. The telescopic end of the nitrogen spring matches the connecting structure provided on the bushing 3 on the fixed end support 2. The fixed end of the nitrogen spring presses against the movable end support 4.

[0081] The AL6061 material support buckle 6 is inserted into the small waist-shaped groove of the movable end support 4 through its machined waist-shaped column feature, so as to fix it on the movable end support 4, thereby achieving the purpose of fixing the compressed end of the nitrogen spring.

[0082] Rotating the handwheel 13 drives the modified lead screw 1 to rotate. Since the trapezoidal lead screw nut 12 is fixedly connected to the movable end support 4, the movable end support 4 moves towards the fixed end support 2 along the guide direction of the modified guide shaft 9, thereby compressing the nitrogen spring and realizing the assembly of the nitrogen spring.

[0083] This nitrogen spring auxiliary assembly fixture uses a handwheel to drive a lead screw, causing the movable end support to move along the guide axis to the fixed end support, thus achieving the compression assembly of the nitrogen spring. This greatly improves assembly efficiency and reduces labor costs. At the same time, it reduces operational risks, eliminates personal injury, reduces the time required for rework due to scratches on the equipment surface, and ensures product delivery schedule.

Claims

1. A nitrogen spring auxiliary assembly jig characterized by, The screw rod (1), the fixed end support (2), the movable end support (4), the guide shaft (9) and the screw rod nut (12) are included, one end of the guide shaft (9) is fixedly connected to the fixed end support (2), the movable end support (4) is linearly slidably installed on the guide shaft (9), one end of the screw rod (1) is rotatably installed on the fixed end support (2), the other end of the screw rod (1) is installed by the screw rod nut (12), the screw rod nut (12) is fixedly connected to the movable end support (4), and the two ends of the nitrogen spring are fixedly connected to the fixed end support (2) and the movable end support (4) respectively.

2. The nitrogen spring assisted assembly fixture of claim 1, wherein, The hand wheel (13) is installed at the end of the screw rod (1) on the side of the fixed end support (2).

3. The nitrogen spring assisted assembly fixture of claim 1, wherein, The handle (7) is fixedly installed on the fixed end support (2) and the movable end support (4) respectively.

4. The nitrogen spring assisted assembly fixture of claim 1, wherein, The screw rod (1) is installed on the fixed end support (2) through the ball bearing (14).

5. The nitrogen spring assisted assembly fixture of claim 1, wherein, The fixed end support (2) is fixedly installed with the bushing (3), and the bushing (3) is provided with a connecting structure matched with the end of the nitrogen spring.

6. The nitrogen spring assisted assembly fixture of claim 5, wherein, The fixed end of the nitrogen spring is abutted against the side surface of the movable end support (4).

7. The nitrogen spring assisted assembly fixture of claim 1, wherein, The screw rod (1) and the guide shaft (9) are provided with the limit cap (5) at the end on the side of the movable end support (4).

8. The nitrogen spring assisted assembly fixture of claim 1, wherein, The movable end support (4) is installed on the guide shaft (9) through the linear bearing (11).

9. The nitrogen spring assisted assembly fixture of claim 5, wherein, The bushing (3) is made of hard plastic.

10. The nitrogen spring assisted assembly fixture of claim 6, wherein, The movable end support (4) is installed with the support buckle (6), and the fixed end of the nitrogen spring is abutted against the support buckle (6).

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