General assembly device for small size oil cylinder

Abstract

The scheme discloses a small-size oil cylinder general assembly device, which comprises a pair of clamping pincers capable of clamping along a Y direction, and further comprises a bottom plate extending along an X direction and a Y direction, and a positioning pin with an axis extending along a Z direction; the clamping pincers and the positioning pin are arranged on the bottom plate; a surface extending along the X direction and the Z direction is formed at a clamping point of the clamping pincers, and the axis of the positioning pin is on the surface; the positioning pin is movable and positionable along the X direction; a plurality of positioning pin mounting holes are arranged on the bottom plate along the X direction, and the positioning pin is inserted into one of the positioning pin mounting holes; and a limiting structure for limiting the positioning pin from being pulled out of the positioning pin mounting hole is further arranged. The scheme has the beneficial effects that the fixing problem of a cylinder body in the prior art is solved, the outer surface of the cylinder body is not scratched, the assembly efficiency is significantly improved, the appearance defects are greatly reduced, and the assembly demand of oil cylinders of multiple specifications can be met.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly, specifically a general assembly device for small-sized hydraulic cylinders. Background Technology

[0002] Assembly is an indispensable process in the production of hydraulic cylinders. Chinese patent document CN110340631A, published on July 19, 2019, discloses a "vertical hydraulic cylinder assembly device," comprising a machine base column, piston rod sleeve, lifting frame, piston rod locking handwheel, transmission gear, motor, rack, cylinder sleeve, machine base, cylinder locking handwheel, piston rod locking screw, fixing sleeve one, piston rod sleeve guide rail, cylinder sleeve guide rail, fixing sleeve two, and cylinder locking screw. The applicant believes that the beneficial effects of this invention are: the invention ensures that the piston rod and cylinder are on the same axis when inserted, avoiding damage to the seals and cylinder during piston rod insertion; the invention avoids the low efficiency and misalignment of manually adjusting the piston rod's entry angle into the cylinder, improving efficiency and ensuring accuracy; the invention occupies less space than horizontal hydraulic cylinder assembly equipment, saving space. In practical applications, the prior art, as mentioned above, has shortcomings. In the traditional small hydraulic cylinder assembly process, it is necessary to ensure that the cylinder body is fixed in position. However, since the cylinder body is cylindrical, it is not easy to fix it in both axial and circumferential dimensions. If a method similar to the aforementioned prior art that relies solely on flat-jaw pliers for clamping is used, it will not only easily cause the cylinder body to slide and be difficult to assemble, but will also damage the outer surface of the cylinder body. In addition, such devices can usually only assemble a single hydraulic cylinder and have poor adaptability to the assembly of hydraulic cylinders of multiple specifications. Summary of the Invention

[0003] Based on the above problems, this utility model provides a universal assembly device for small-sized hydraulic cylinders to solve the problem of difficulty in fixing the cylinder body during assembly.

[0004] To achieve the purpose of this invention, the present invention adopts the following technical solution: a universal assembly device for small-sized hydraulic cylinders, comprising a pair of clamps capable of clamping along the Y direction, and further comprising:

[0005] The base plate extends along the X and Y directions;

[0006] Locating pin, with its axis extending along the Z direction;

[0007] Both the clamps and the locating pins are located on the base plate;

[0008] Make a surface extending along the X and Z directions from the clamping point of the clamp, and place the axis of the locating pin on this surface.

[0009] Preferably, the locating pin is movable and positioned in the X direction.

[0010] Preferably, the base plate is provided with several positioning pin mounting holes along the X direction, and the positioning pin is inserted into one of the positioning pin mounting holes.

[0011] Preferably, a limiting structure is also included to prevent the locating pin from dislodging from the locating pin mounting hole.

[0012] Preferably, the limiting structure includes:

[0013] The limiting stop bar extends along the X direction, and there is a gap between the lower end of the limiting stop bar and the base plate.

[0014] The positioning pin limiting piece is located on the outer wall of the positioning pin, extends radially along the positioning pin, and has a notch in some areas;

[0015] When the notch on the positioning pin limit piece faces the limit bar, the lower end of the positioning pin can be inserted into the positioning pin mounting hole; at this time, by rotating the angle of the positioning pin, the positioning pin limit piece rotates into the gap between the lower end of the limit bar and the base plate, thus axially limiting the positioning pin.

[0016] Preferably, the clamping surface of the clamp is provided with a cylinder surface protection structure.

[0017] Preferably, the cylinder block surface protection structure is a nylon block.

[0018] Preferably, the clamp can move in the X direction.

[0019] Preferably, the base plate is provided with a clamp sliding groove extending in the X direction, and a slider is provided below the base of the clamp, which is located in the clamp sliding groove and can slide.

[0020] Preferably, the upper surface of the locating pin limiting piece is a spiral surface that extends in the circumferential direction and rises in one direction.

[0021] As a preferred option, a jack is also included; the jack is positioned between the thrust head or rotor bracket facing the working position and the tooling main board.

[0022] This universal assembly device for small-sized hydraulic cylinders requires the following steps: First, adjust the distance between the clamps and the locating pin according to the length of the cylinder body to be assembled. Then, align the notch on the locating pin's limiting plate with the limiting stop bar, allowing the locating pin to smoothly insert into the pre-selected locating pin mounting hole. Next, rotate the locating pin slightly to ensure the limiting stop bar engages the locating pin's limiting plate, preventing the locating pin from dislodging from the mounting hole or causing any wobbling. Then, place the end ring of one end of the cylinder body onto the locating pin, positioning the middle and rear of the cylinder body between the two clamps. Control the clamps to close until the nylon blocks slightly grip the cylinder body. Because the circumferential rotation and axial movement of the cylinder body are restricted by the locating pin, assembly efficiency is significantly improved. The clamps only serve to prevent the middle and rear of the cylinder body from swaying, requiring very little clamping force. Furthermore, the use of nylon blocks in direct contact with the cylinder body surface eliminates the damaging effects of traditional clamping, greatly helping to protect the product's appearance. Since both the locating pin and the clamp can move in the X direction, it can adapt to the assembly needs of various sizes of small hydraulic cylinders.

[0023] In summary, the advantages of this solution are: it effectively solves the problem of cylinder block fixing in the prior art, without scratching the outer surface of the cylinder block, significantly improves assembly efficiency, greatly reduces appearance defects, and can adapt to the assembly needs of multiple specifications of hydraulic cylinders. Attached Figure Description

[0024] Figure 1 This is a top view of the present invention;

[0025] Figure 2 This is a front view of the present invention;

[0026] Figure 3 This is a left view of the present invention;

[0027] Figure 4 This is a perspective view of the present invention;

[0028] Figure 5 This is a front view of the locating pin;

[0029] Figure 6 This is a top view of the locating pin.

[0030] The components are: 01 clamp base, 11 clamp, 02 nylon block, 03 base plate, 31 positioning pin mounting hole, 32 clamp sliding groove, 04 limit stop bar, 41 limit stop bar gap, 05 positioning pin, 51 positioning pin body, 52 positioning pin limit piece, and 53 positioning pin base. Detailed Implementation

[0031] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0032] For ease of description, the orientation definitions of X, Y, and Z in the following embodiments are provided in [reference needed]. Figure 4 As shown.

[0033] Example 1

[0034] Example 1 details a universal assembly device specifically designed for small-sized hydraulic cylinders. For a more intuitive understanding of the device's structure and layout, please refer to the accompanying documentation. Figure 1 , Figure 2 , Figure 3 and Figure 4 The assembly device involved in this embodiment includes the following core components: a base plate 03, which extends along the X and Y directions in space, providing a stable support foundation for the entire device; a pair of clamps 11, which are carefully set on the base plate 03 and have the function of clamping along the Y direction. This design allows the device to flexibly adapt to the assembly needs of small-sized hydraulic cylinders with different outer diameters; the clamps 11 can be adapted using existing tools such as bench vises; and a positioning pin 05, which is firmly fixed on the base plate 03 and whose axis is consistent with the Z direction in space. It is used to position the end ring at one end of the cylinder body of the hydraulic cylinder to be assembled, providing a key positioning reference for the precise assembly of the hydraulic cylinder.

[0035] Furthermore, to ensure the stability and accuracy of the hydraulic cylinder during assembly, this embodiment features a specially designed plane at the clamping point of the clamp 11. This plane extends not only along the X direction but also along the Z direction, forming a stable positioning reference plane. Particularly noteworthy is that the axis of the positioning pin 05 lies precisely on this carefully designed plane. This ingenious design ensures the precise positioning of the hydraulic cylinder during assembly, effectively improving assembly efficiency and quality.

[0036] As the most basic and crucial embodiment of this solution, Embodiment 1 lays a solid foundation for the gradual optimization and improvement of subsequent embodiments.

[0037] Example 2

[0038] Building upon the basic framework of the universal assembly device for small-sized hydraulic cylinders constructed in Embodiment 1, this embodiment makes a key improvement: specifically, a nylon block 02 is carefully installed on the clamping surface of the clamp 11. This design consideration aims to effectively buffer the direct clamping force of the clamp 11 on the surface of the assembled hydraulic cylinder body through the soft material properties of the nylon block 02, thereby avoiding scratches, wear, and other damage to the surface of the hydraulic cylinder body during assembly, achieving comprehensive protection for the surface of the clamped and assembled hydraulic cylinder body. Apart from the above improvement, other structural designs and functional characteristics of this embodiment are consistent with those of Embodiment 1.

[0039] Example 3

[0040] The core improvement of this embodiment compared to the previous scheme lies in the fact that multiple positioning pin mounting holes 31 are evenly distributed along the X direction on the base plate 03 at specific intervals. These mounting holes are spaced reasonably apart, providing multiple possibilities for the flexible arrangement of the positioning pins 05. The positioning pins 05 can be fitted into any selected positioning pin mounting hole 31. Their specific installation positions are not fixed, but can be flexibly adjusted and selected according to the actual length of the cylinder body to be assembled, thereby ensuring that the positioning pins can accurately adapt to the assembly requirements of cylinders of different specifications. Apart from the above improvements, other structural designs and functional characteristics of this embodiment are consistent with those of Embodiment 2.

[0041] Example 4

[0042] This embodiment features significant improvements over the original, particularly in the selection and adjustment of the clamp: It innovatively employs flat-jaw pliers as a dedicated clamp for holding the cylinder body to be assembled. The clamp base 01 of the flat-jaw pliers is securely mounted on the base plate 03, providing a solid foundation for the entire clamping system. To enhance the flexibility and applicability of the clamp, a clamp sliding groove 32 is carefully designed along the X-direction on the base plate 03. Simultaneously, a slider (not specifically shown in the figure) is correspondingly provided at the bottom of the clamp base 01. The slider is embedded in the clamp sliding groove, allowing the entire flat-jaw pliers to smoothly slide the pair of clamps 11 along the X-direction. This design greatly improves the versatility of the device, enabling convenient and quick adaptation to cylinder bodies of different lengths to be assembled, meeting diverse assembly needs. Apart from the above improvements, the other structural designs and functional characteristics of this embodiment remain consistent with Embodiment 3.

[0043] Example 5

[0044] This embodiment makes a key improvement to the original design by creating a highly efficient and stable fixing structure for the positioning pin 05. Specifically, this structure cleverly divides the positioning pin 05 into two independent parts: the upper positioning pin body 51 and the lower positioning pin base 53. External threads are carefully machined on the outer surface of the positioning pin base 53, while corresponding internal threads are provided on the inner wall of the positioning pin mounting hole 31. Through this threaded connection, the positioning pin 05 can be firmly fixed to the base plate 03, ensuring stability and accuracy during assembly. Although this method performs excellently in terms of stability, the relatively numerous threading actions make it slightly cumbersome to operate, thus making it more suitable for applications where the positioning pin 05 remains in a fixed position for extended periods. Apart from the above improvements, the other structural designs and functional characteristics of this embodiment are consistent with Embodiment 4.

[0045] Example 6

[0046] In the description of this embodiment, it should be clearly pointed out that it is parallel to Embodiment 5. This means that this embodiment and Embodiment 5 have the same status in terms of overall design concept or functional positioning, are independent of each other but complementary to each other, and together enrich the entire technical solution system.

[0047] This embodiment, based on embodiment 4, further adds a unique and practical fixing structure for the positioning pin 05. This fixing structure is designed to improve the installation stability and reliability of the positioning pin 05 to meet more complex and precise positioning requirements.

[0048] Specifically, the locating pin 05 is designed as a frustum, or at least a portion of its lower part is designed as a frustum. This frustum design results in a smaller upper dimension and a larger lower dimension for the locating pin 05, creating a gradual transition. The matching locating pin mounting hole 31 is carefully designed as a frustum-shaped hole of the same shape and size. The shape of the frustum-shaped hole perfectly matches the conical locating pin 05, achieving a high degree of consistency in shape and size, thus laying a solid foundation for subsequent installation and fixation.

[0049] In actual use, the operator only needs to insert the locating pin 05 into the locating pin mounting hole 31 from bottom to top. As the locating pin 05 is gradually inserted into the mounting hole 31, due to the conical design, the contact area between the locating pin 05 and the locating pin mounting hole 31 will gradually increase, and the friction between them will also increase. As long as the base plate 03 is tightly attached to a working surface, this tight attachment can provide stable support for the entire structure, so that when the locating pin 05 is subjected to external force, it can be firmly fixed in the mounting hole 31 by relying on the friction between it and the locating pin mounting hole 31 and the supporting force between the base plate 03 and the working surface, and will not easily come out.

[0050] Apart from the improvements to the fixing structure of the positioning pin 05 mentioned above, the other parts of this embodiment are consistent with Embodiment 4 to ensure the coherence and stability of the entire technical solution.

[0051] Example 7

[0052] This embodiment can be considered a relatively simple variation of Embodiment 6. In terms of specific design, the lower structure of the positioning pin 05 has been uniquely improved, being designed as a stepped shape that is smaller at the top and larger at the bottom. This stepped design is not arbitrary but carefully considered to achieve more precise positioning and reliable fixing.

[0053] Correspondingly, the mounting hole 31 for the locating pin is also designed as a stepped hole, smaller at the top and larger at the bottom. The shape of the stepped hole perfectly matches the stepped shape of the lower part of the locating pin 05. The two echo each other in size and structure, creating favorable conditions for subsequent installation and positioning.

[0054] During actual installation, the locating pin 05 is inserted into the locating pin mounting hole 31 from bottom to top. When the locating pin 05 moves upward, it is limited by the stepped hole, preventing it from moving further upward, thus ensuring the stability of the locating pin 05 in the vertical direction. When the locating pin 05 tends to move downward, the working plane under the base plate 03 will act as a limiter, preventing it from falling out downward. Through this bidirectional limiting method, the locating pin 05 can be firmly fixed in the locating pin mounting hole 31, meeting the corresponding positioning and fixing requirements.

[0055] Apart from the design changes to the positioning pin 05 and its mounting hole mentioned above, the rest of this embodiment is consistent with embodiment 4.

[0056] Examples 5, 6, and 7 are only applicable to scenarios where the positioning pin 05 remains in a constant position for an extended period.

[0057] Example 8

[0058] This embodiment is still based on embodiment 4, and a fixing structure has been carefully designed for the positioning pin 05, which aims to improve the installation stability and ease of use of the positioning pin 05.

[0059] Specifically, the unique feature of this fixing structure lies in the fine machining of the lower outer wall of the locating pin 05, forming three protruding points. These three protrusions are not randomly distributed, but cleverly arranged on the same circumference of the cylindrical surface of the locating pin 05, and spaced at equal angles from each other. This design ensures that the locating pin 05 is subjected to uniform force during installation, enabling it to more stably engage with the mounting hole.

[0060] Meanwhile, three mating grooves are correspondingly provided on the inner wall of the locating pin mounting hole 31. These mating grooves are ingeniously designed. Their upper ends are open to facilitate the smooth entry of the protrusion of the locating pin 05; the upper section is vertical to ensure that the protrusion will not shift during the downward movement; the lower section extends slightly along the circumference and finally closes at the lower end. This design provides a reliable limit for fixing the locating pin 05.

[0061] During actual installation, simply align each protrusion on the locating pin 05 with the upper opening of the mating groove, gently insert it, and then allow the locating pin 05 to slide down to the bottom. Next, slightly rotate the locating pin 05 at an angle, and the protrusions will engage with the circumferentially extending portion of the lower section of the mating groove, thus ensuring that the locating pin 05 will not come out upwards. This design not only facilitates the quick installation and removal of the locating pin 05 and greatly improves work efficiency, but it is important to note that it places high demands on the machining of parts, requiring precise control of the dimensions and positional accuracy of the protrusions and the mating groove.

[0062] Apart from the improvements to the fixing structure of the positioning pin 05 mentioned above, the rest of this embodiment is consistent with embodiment 4.

[0063] Example 9

[0064] Example 9, as a preferred embodiment of this technical solution, demonstrates significant optimization and practicality in design and functional implementation. In this embodiment, the positioning pin 05 is carefully machined, and its structure is as follows: Figure 5 and Figure 6 As shown, it is divided into three main parts: the upper part is the positioning pin body 51, which undertakes the main positioning function; the middle part is the positioning pin limit piece 52, which is the key component for achieving precise positioning and fixation; and the lower part is the positioning pin base 53, which is responsible for docking and stabilizing with the mounting hole.

[0065] Specifically, the locating pin limiting piece 52 is designed as a ring-shaped structure surrounding the circumference of the locating pin 05. However, it is worth noting that this ring... Figure 6 A piece is missing from the right side, creating a gap. This unique design facilitates subsequent installation and disassembly.

[0066] Furthermore, this embodiment innovatively introduces a new component—the limiting strip 04. The limiting strip 04 is elongated and cleverly fixed to the base 03, positioned close to each locating pin mounting hole 31, and arranged along the X-direction. In cross-sectional shape, the limiting strip 04 exhibits an inverted L-shape, with its opening pointing precisely towards the location of the locating pin mounting hole 31. This design creates a gap 41 between the limiting strip 04 and the base 03, matching the thickness of the locating pin limiting piece 52.

[0067] In actual use, the user only needs to align the notch of the positioning pin limiting piece 52 with the limiting strip 04, and then smoothly insert the positioning pin base 53 into the positioning pin mounting hole 31. Next, by rotating the positioning pin 05, the positioning pin limiting piece 52 is fully embedded in the gap 41 of the limiting strip, thus ensuring that the positioning pin 05 is securely and accurately installed in place.

[0068] This solution is not only quick and easy to assemble and disassemble, but also particularly suitable for application scenarios that require frequent changes to the installation position of the positioning pin 05. It greatly improves work efficiency, reduces operational difficulty, and brings significant convenience to users. The remaining parts are consistent with Embodiment 4, ensuring the coherence and stability of the overall solution.

[0069] Example 10

[0070] Example 10, building upon the robust foundation established in Example 9, further implements subtle and ingenious optimization designs. Specifically, the structure of the locating pin limiting piece 52 is innovatively designed as a helical surface that monotonically rises along the circumferential direction. This unique design allows the helical surface to gradually contact and generate interaction force with the mating parts when the locating pin 05 is inserted into the corresponding mounting hole and rotated, thereby achieving a pre-tightening effect through this helical advancement method. This improvement not only enhances the stability of the locating pin but also improves its reliability and durability during use. Apart from this, the rest of Example 10 remains consistent with Example 9, ensuring the coherence of the overall solution and a smooth transition to optimization and upgrades.

Claims

1. A universal assembly device for small-sized hydraulic cylinders, comprising a pair of clamps (11) capable of clamping along the Y direction, characterized in that, it further includes... include: The base plate (03) extends along the X and Y directions; Positioning pin (05), with its axis extending along the Z direction; The clamp (11) and the positioning pin (05) are both located on the base plate (03); Make a surface extending along the X and Z directions using the clamping point of the clamp (11), and the axis of the positioning pin (05) lies on this surface.

2. The universal assembly device for small-sized hydraulic cylinders according to claim 1, characterized in that, The positioning pin (05) is movable and positioned in the X direction.

3. The universal assembly device for small-sized hydraulic cylinders according to claim 2, characterized in that, The base plate (03) has several positioning pin mounting holes (31) arranged along the X direction, and the positioning pin (05) is inserted into one of the positioning pin mounting holes (31).

4. The universal assembly device for small-sized hydraulic cylinders according to claim 3, characterized in that, It also includes a limiting structure that prevents the positioning pin (05) from dislodging from the positioning pin mounting hole (31).

5. The universal assembly device for small-sized hydraulic cylinders according to claim 4, characterized in that, The limiting structure includes: The limiting stop bar (04) extends along the X direction, and there is a gap between the lower end of the limiting stop bar (04) and the base plate (03); The positioning pin limiting piece (52) is located on the outer wall of the positioning pin (05), extends radially along the positioning pin (05), and has a partial notch; When the notch on the positioning pin limiting piece (52) faces the limiting strip (04), the lower end of the positioning pin (05) can be inserted into the positioning pin mounting hole (31); at this time, by rotating the angle of the positioning pin (05), the positioning pin limiting piece (52) rotates into the gap between the lower end of the limiting strip (04) and the base plate (03), thus forming an axial limit on the positioning pin (05).

6. The universal assembly device for small-sized hydraulic cylinders according to any one of claims 1 to 5, characterized in that, The clamping surface of the clamp (11) is provided with a cylinder surface protection structure.

7. A universal assembly device for small-sized hydraulic cylinders according to claim 6, characterized in that, The cylinder block surface protection structure is a nylon block (02).

8. The universal assembly device for small-sized hydraulic cylinders according to any one of claims 1 to 5, characterized in that, The clamp (11) can move along the X direction.

9. A universal assembly device for small-sized hydraulic cylinders according to claim 8, characterized in that, The base plate (03) is provided with a clamp sliding groove (32) extending along the X direction. A slider is provided below the base of the clamp (11), and the slider is located in the clamp sliding groove (32) and can slide.

10. A universal assembly device for small-sized hydraulic cylinders according to claim 5, characterized in that, The upper surface of the positioning pin limit piece (52) is a spiral surface that extends in the circumferential direction and rises in one direction.

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