Multi-layer shaft pin screw

Abstract

The utility model provides a multi-layer shaft pin screw. The multi-layer shaft pin screw comprises a screw body. According to the multi-layer shaft pin screw, the screw body, the first shaft body, the second shaft body, the third shaft body and other structures are arranged, the first shaft body is in threaded connection with the screw body through the first externally-connected threaded column, contact and positioning between the first shaft body and other components can be increased through a connecting block, the unique layered internal thread design is adopted in the second shaft body, and the upper half part is connected with the first shaft body; the lower half part is matched with the screw body, the second external threaded column at the bottom of the second shaft body is connected with the third shaft body, the key function of connecting the upper part and the lower part is achieved in the structure, acting force in all directions is effectively dispersed, the bearing capacity is improved, layered internal threads are also arranged in the third shaft body, connection with the second shaft body is further strengthened, and the third shaft body cooperates with the screw body; the connecting depth and strength are enhanced, external force such as torque and vibration is effectively dispersed, the screw is prevented from loosening, reliable connection is ensured, and the whole screw structure is extremely convenient to assemble, disassemble, maintain and replace parts by means of a threaded connection mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw structure technical field more specifically, relate to a multilayer axle pin screw. BACKGROUND

[0002] Screw is the physical and mathematical principle of using the inclined plane circular rotation and friction of object, gradually tightens the tool of machine parts. Screw is the general saying of fastener, daily colloquialism. Screw is the indispensable industrial necessity in daily life: such as the extremely small screw of camera, glasses, watch, electronic etc.;General screw of television, electrical products, musical instrument, furniture etc.;As for engineering, building, bridge, then uses large screw, nut. Traffic appliance, airplane, electric car, car etc. are used for large and small screw. Screw has important task in industry, as long as there is industry on the earth, the function of screw is important forever. Screw is the common invention of people's production and life for thousands of years, according to the application field, it is the first invention of mankind.

[0003] But the existing screw has the following problems when using:

[0004] Traditional screw is used to fix workpiece, plays the role of fastening, but the function is single, when disassembling, it cannot be quickly disassembled, often more cumbersome, needs to consume a large amount of time and labor cost. Especially in some compact structure, space-limited equipment interior, the operation difficulty is greater, which undoubtedly increases the maintenance cost and downtime of equipment, brings many inconvenience to production, affects the work efficiency of workers.

[0005] The utility model can play the role of through the unique multilayer axle body structure design, when bearing torque and vibration and other external force, the parts can work cooperatively, evenly disperses force, avoids screw loosening, ensures the reliability of connection, simultaneously, the parts between using the mode of threaded connection, greatly simplifies the operation process of assembling, disassembling and maintaining and replacing parts, significantly improves the practicability and flexibility of product. UTILITY MODEL CONTENT

[0006] The utility model aims at solving the technical problem in the above background art, and provides a multilayer axle pin screw.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a multilayer axle pin screw, comprising: a screw body, characterized by: the surface of the screw body is nested with an axle body one, the bottom of the axle body one is connected with an axle body two in a threaded mode, and the bottom of the axle body two is connected with an axle body three in a threaded mode.

[0008] Further preferred: the screw body is composed of a screw head and a column, the screw head is provided with a screw hole at the upper end, the screw hole is internally hexagonal, the column surface is provided with external threads, and the column is threadedly connected with the shaft body one, the shaft body two and the shaft body three through external threads.

[0009] Further preferred: the shaft body one is composed of a fixed disc, a connecting column and an external threaded column one, the fixed disc bottom is fixedly connected with the connecting column, the connecting column surface is fixedly installed with a plurality of connecting blocks, the connecting block upper end is fixedly connected with the fixed disc bottom, the connecting column bottom is fixedly connected with the external threaded column one, the external threaded column one outer surface is threadedly connected with the shaft body two, the external threaded column one inner part is threadedly connected with the external threads, and the fixed disc upper end is provided with a socket, which is nested on the column outer surface.

[0010] Further preferred: the shaft body two bottom is fixedly installed with an external threaded column two, the external threaded column two is threadedly connected with the shaft body three, and the shaft body two inner part is provided with an internal thread one.

[0011] Further preferred: the internal thread one is divided into upper and lower parts, the upper part internal thread one is threadedly connected with the external threaded column one, and the lower part internal thread one diameter is smaller than the external threaded column one and is matched with the external threads.

[0012] Further preferred: the shaft body three inner part is provided with an internal thread two, the internal thread two is divided into upper and lower parts, the upper part internal thread two is threadedly connected with the external threaded column two, and the lower part internal thread two diameter is smaller than the external threaded column two and is matched with the external threads.

[0013] Beneficial effects:

[0014] 1. By setting the shaft body one and the external threaded column one, the connecting blocks on the shaft body one can increase the contact area with other components or provide additional connection points, facilitating further fixation and positioning of the components, improving the installation accuracy and stability, and the external threaded column one realizes the threaded connection of the shaft body one with the screw body and the shaft body two, building a basic connection framework of the multi-layer shaft pin screw, making the components closely connected to form a stable overall structure. At the same time, this design makes the multi-layer shaft pin screw convenient to operate during assembly and disassembly, facilitating maintenance and replacement of components, enhancing its flexibility and practicality in actual application;

[0015] 2. By setting the shaft body two and the outer threaded column two, the inner thread one in the shaft body two is divided into two parts, the upper half is threadedly connected with the outer threaded column one, realizing the stable connection with the shaft body one, and the lower half is matched with the outer thread of the screw body, enhancing the connection level of the overall structure, which makes the shaft body two in the key intermediate connection position in the multi-layer shaft pin screw structure, effectively disperses the force in different directions, avoids the single connection point from bearing too much stress, greatly improves the carrying capacity and reliability of the whole screw, the outer threaded column two is fixedly installed at the bottom of the shaft body two, which is threadedly connected with the shaft body three, further perfecting the connection structure of the multi-layer shaft pin screw, making the shaft body two and the shaft body three closely combined to form a coherent and stable whole, this connection mode not only ensures the stability of the structure, but also in the process of assembly and disassembly, only through simple rotation operation, the installation and separation of each part can be conveniently completed;

[0016] 3. By setting the shaft body three, the inner thread two in the shaft body three is divided into two parts, the upper half is threadedly connected with the outer threaded column two, further strengthening the connection tightness with the shaft body two, and stabilizing the overall structure; the lower half is matched with the outer thread of the screw body column, so that the screw body can work cooperatively with the shaft body three when being screwed in, increasing the depth and strength of the connection, in actual work, the shaft body three can share the force from different directions with the shaft body two, especially in the working condition of bearing large torque or vibration, can more effectively disperse the force, prevent the screw from loosening, ensure the reliability of the connection, and broaden the application range of the multi-layer shaft pin screw in complex working environment;

[0017] 4. As described above, the multi-layer shaft pin screw is provided with a screw body, a shaft body one, a shaft body two and a shaft body three, the shaft body one is threadedly connected with the screw body through the outer threaded column one, the connecting block can increase the contact and positioning with other parts, the shaft body two is internally provided with unique layered inner thread design, the upper half connects the shaft body one, and the lower half cooperates with the screw body, the outer threaded column two at the bottom of the shaft body two is connected with the shaft body three, plays a key role in the structure, effectively disperses the force in each direction, improves the carrying capacity, the shaft body three is also internally provided with layered inner thread, further strengthens the connection with the shaft body two, cooperates with the screw body, enhances the connection depth and strength, the parts are closely matched, can effectively disperse the external force such as torque and vibration, prevent the screw from loosening, ensure the reliable connection, and the whole screw structure is extremely convenient in assembly, disassembly and maintenance and replacement of parts, significantly improves the practicality and flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the overall structure schematic diagram of the utility model.

[0019] Fig. 2The exploded structural schematic view of the screw shaft body of the utility model.

[0020] Fig. 3 The exploded structural schematic view of the shaft body two and the shaft body three of the utility model.

[0021] Figs. 1-3 Middle: 1, screw body; 101, screw head; 102, cylinder; 103, external thread; 104, screw port; 2, shaft body one; 201, fixed disc; 202, connecting column; 203, connecting block; 204, external thread connecting column one; 205, socket; 3, shaft body two; 301, external thread connecting column two; 302, internal thread one; 4, shaft body three; 401, internal thread two. DETAILED DESCRIPTION

[0022] The utility model will be described below in conjunction with the drawings of the embodiments of the utility model. Figs. 1-3 The technical scheme in the embodiments of the utility model is clearly and completely described.

[0023] Please refer to Figs. 1-3The utility model discloses a kind of multi-layer axle pin screws, comprising: screw body 1, screw body 1 surface is nested with shaft body one 2, shaft body one 2 bottom is threadedly connected with shaft body two 3, shaft body two 3 bottom is threadedly connected with shaft body three 4, screw body 1 is made of screw head 101 and cylinder 102, screw head 101 upper end is provided with screw mouth 104, screw mouth 104 is internally hexagon setting, cylinder 102 surface is provided with external thread 103, cylinder 102 is threadedly connected with shaft body one 2, shaft body two 3, shaft body three 4 by external thread 103, shaft body one 2 is made of fixed disc 201, connecting column 202, external thread column one 204, and fixed disc 201 bottom is fixedly connected with connecting column 202, connecting column 202 surface is fixedly installed with several connecting blocks 203, connecting block 203 upper end is fixedly connected with the bottom of fixed disc 201, connecting column 202 bottom is fixedly connected with external thread column one 204, external thread column one 204 outer surface is threadedly connected with shaft body two 3, and external thread column one 204 inside is threadedly connected with external thread 103, and fixed disc 201 upper end is provided with socket 205, socket 205 is nested in the outer surface of cylinder 102, first, screw body 1 is prepared, and it is made of screw head 101 with internally hexagon screw mouth 104 and cylinder 102 with external thread 103 on surface, then take shaft body one 2, the upper end of the fixed disc 201 of shaft body one 2 is provided with socket 205, socket 205 is nested in the cylinder 102 of screw body 1, so that fixed disc 201 and screw head 101 are closely attached, at this time, the connecting block 203 on the surface of the connecting column 202 of shaft body one 2 is also in corresponding position, then, by rotating shaft body one 2, the external thread column one 204 of shaft body one 2 is threadedly connected with the external thread 103 on the surface of the cylinder 102 of screw body 1, until reaching the fastening degree of appropriateness, after completing the connection of screw body 1 and shaft body one 2, start connecting shaft body two 3, one end of shaft body two 3 is provided with the internal thread matched with the external thread column one 204 of shaft body one 2, the end of shaft body two 3 is aligned with the external thread column one 204 of shaft body one 2, by rotating shaft body two 3, so that shaft body two 3 and the external thread column one 204 of shaft body one 2 are threadedly connected, also rotate to the fastening degree of appropriateness, after the completion of the connection of shaft body two 3, the connection of shaft body three 4 is carried out, one end of shaft body three 4 is also provided with the internal thread matched with the bottom of shaft body two 3, the end of shaft body three 4 is aligned with the bottom of shaft body two 3, by rotating shaft body three 4, so that shaft body three 4 and shaft body two 3 are threadedly connected, reach the fastening degree of appropriateness, thus multi-layer axle pin screw assembly is completed, when multi-layer axle pin screw is assembled, according to actual use demand, it is installed on target component, first, internally hexagonal spanner is inserted into internally hexagonal screw mouth 104 on the screw head 101 of screw body 1, then, by internally hexagonal spanner rotating screw body 1, so that the external thread 103 on the surface of the cylinder 102 of screw body 1 and the corresponding thread hole on target component are threadedly connected, in the process of rotating,The shaft body one 2, the shaft body two 3 and the shaft body three 4 will rotate with the screw body 1 and gradually screw into the threaded hole of the target component until the desired tightening effect is achieved, realizing the connection or fixation of the target component. In actual work, the multi-layer shaft pin screw can play different roles. The connecting block 203 of the shaft body one 2 can increase the contact area with other components or provide additional connection points for further fixation or positioning of related components. The shaft body two 3 and the shaft body three 4 can share the force borne by the screw in different directions or levels, making the entire connection structure more stable. For example, in some mechanical component connections that need to bear large torque or vibration, the structure of the multi-layer shaft pin screw can effectively disperse the force, prevent the screw from loosening, ensure the reliability of the connection, and ensure the normal operation of the equipment. When the multi-layer shaft pin screw needs to be disassembled, a hexagonal socket wrench is inserted into the hexagonal socket 104 of the screw head 101, and then rotated in the opposite direction, so that the screw body 1 gradually unscrews from the threaded hole of the target component. As the screw body 1 is unscrewed, the shaft body one 2, the shaft body two 3 and the shaft body three 4 will also be unscrewed together. After that, if the components of the multi-layer shaft pin screw need to be repaired or replaced, the shaft body three 4, the shaft body two 3 can be disassembled from the shaft body one 2 in the reverse order of assembly, and finally the shaft body one 2 can be disassembled from the screw body 1.

[0024] The utility model discloses a threaded connection structure of multilayer shaft pin screw, which comprises a shaft body one 2, a shaft body two 3 and a shaft body three 4, and the shaft body one 2 is fixedly connected with the shaft body two 3 through a threaded connection mode, and the shaft body three 4 is fixedly connected with the shaft body two 3 through a threaded connection mode.The cooperation of the lower half internal thread 302 and the external thread 103 can also bear the force from the screw body 1 column 102, so that the single connection point can avoid bearing excessive stress, thereby improving the carrying capacity and reliability of the whole multi-layer shaft pin screw. Since the parts are connected through threads, when assembling and disassembling the multi-layer shaft pin screw, only the corresponding tool (such as a wrench) is needed to rotate each shaft or screw body, so that the assembly or disassembly operation can be completed. At the same time, since the connection structure between different shafts is clear, the parts can be maintained, replaced or adjusted through the threaded connection, for example, when a shaft body is damaged, the corresponding shaft body can be disassembled alone without disassembling the whole multi-layer shaft pin screw structure.

[0025] In the embodiment of the utility model, the internal thread two 401 is arranged in the shaft body three 4, the internal thread two 401 is divided into upper and lower two parts, the upper half internal thread two 401 is connected with the external thread column two 301, the lower half internal thread two 401 is less than the external thread column two 301 in diameter and is matched with the external thread 103, the internal thread two 401 in the shaft body three 4 is divided into upper and lower two parts, and the design idea of the internal thread one 302 of the shaft body two 3 is similar, and both are for realizing multi-layer connection and the adaptation of different parts, the upper half internal thread two 401 is connected with the external thread column two 301 at the bottom of the shaft body two 3, the connection mode is closely connected with the shaft body two 3 and the shaft body three 4, and the shaft body three 4 can be stably matched with the shaft body two 3 in the structure system of the multi-layer shaft pin screw, in actual assembly process, the upper and lower threads are engaged by rotating the shaft body three 4, closely connected, and the whole screw structure is provided with continuous and stable support, the lower half internal thread two 401 is less than the external thread column two 301 in diameter and is matched with the external thread 103 of the column 102 of the screw body 1, and the design makes the column 102 of the screw body 1 not only cooperate with the lower half internal thread one 302 of the shaft body two 3 in the process of screwing, but also cooperate with the lower half internal thread two 401 of the shaft body three 4, which further enhances the connection strength and stability between the screw body 1 and the shaft body three 4.

[0026] Working principle: Prepare the screw body 1, which is composed of a screw head 101 with an internal hexagonal socket 104 and a column 102 with external threads 103 on the surface. The internal hexagonal socket 104 of the screw head 101 provides an operating interface for subsequent installation and removal using an internal hexagonal wrench. The external threads 103 are the key structure for connecting with other components (such as shaft body one 2, shaft body two 3, and shaft body three 4). Take the shaft body one 2, which is composed of a fixed disc 201, a connecting column 202, and an external threaded column one 204. The fixed disc 201 has a socket 205 at the top. Insert the socket 205 into the column 102 of the screw body 1 to nest it, making the fixed disc 201 tightly fit the screw head 101. At this time, the connecting block 203 on the surface of the connecting column 202 of the shaft body one 2 is also in the corresponding position. The connecting block 203 can be used to increase the contact area with other components or provide additional connection points, making it easier to further fix or position related components. Rotate the shaft body one 2 to make the external threaded column one 204 of the shaft body one 2 threadedly connect with the external threads 103 on the surface of the column 102 of the screw body 1. During the rotation process, pay attention to controlling the rotation force and angle to ensure that the threads can be accurately and smoothly screwed until the appropriate tightening degree is reached. This step completes the initial connection of the screw body 1 and the shaft body one 2, laying the foundation for the connection of the shaft body two 3 and the shaft body three 4. The shaft body two 3 has an internal thread one 302 inside, which is divided into upper and lower parts. The upper half of the internal thread one 302 matches the external threaded column one 204 of the shaft body one 2. Align the end of the shaft body two 3 with the external threaded column one 204 of the shaft body one 2. Rotate the shaft body two 3 to make the upper half of the internal thread one 302 of the shaft body two 3 threadedly connect with the external threaded column one 204 of the shaft body one 2. This connection makes the shaft body two 3 tightly connect with the shaft body one 2, forming an intermediate connection layer in the multi-layer shaft pin screw structure, further enhancing the stability of the overall structure. The shaft body two 3 is fixedly installed with an external threaded column two 301 at the bottom. The shaft body three 4 has an internal thread two 401 inside, which is also divided into upper and lower parts. The upper half of the internal thread two 401 matches the external threaded column two 301. Align the end of the shaft body three 4 with the external threaded column two 301 at the bottom of the shaft body two 3. Rotate the shaft body three 4 to make the upper half of the internal thread two 401 of the shaft body three 4 threadedly connect with the external threaded column two 301 of the shaft body two 3. At this time, the assembly of the multi-layer shaft pin screw is completed, and the shaft bodies are connected through threads to form a complete and tight structure system. After the multi-layer shaft pin screw is assembled, according to the actual use requirements, it is installed on the target component. First, use an internal hexagonal wrench to insert into the internal hexagonal socket 104 of the screw head 101 of the screw body 1. The internal hexagonal wrench provides operating force for rotating the screw body 1. Rotate the screw body 1 through the internal hexagonal wrench to make the external threads 103 on the surface of the column 102 of the screw body 1 threadedly connect with the corresponding thread holes on the target component.Because the inner thread one 302 of the lower part of the shaft body two 3 is smaller in diameter than the outer thread column one 204 and is matched with the outer thread 103, the inner thread two 401 of the lower part of the shaft body three 4 is smaller in diameter than the outer thread column two 301 and is matched with the outer thread 103. In the rotation process, the shaft body one 2, the shaft body two 3 and the shaft body three 4 will rotate together with the screw body 1 and gradually rotate into the threaded hole of the target component. The shaft body two 3 and the shaft body three 4 share the force borne by the screw in different directions or levels. The upper and lower parts of the inner thread one 302 of the shaft body two 3 are connected with the shaft body one 2 and the screw body 1 respectively. The upper and lower parts of the inner thread two 401 of the shaft body three 4 are connected with the shaft body two 3 and the screw body 1 respectively. This multi-level connection can effectively disperse the force among the shaft bodies. In the connection of some mechanical components that need to bear large torque or vibration, this structure of the multi-layer shaft pin screw can effectively disperse the force and prevent the screw from loosening. When the multi-layer shaft pin screw needs to be disassembled, the inner hexagonal socket 104 of the screw head 101 is inserted into the inner hexagonal wrench, and then the inner hexagonal wrench is rotated in the opposite direction to make the screw body 1 gradually rotate out of the threaded hole of the target component. Because the shaft bodies are connected through threads and are rotated into the target component together with the screw body 1 during installation, the shaft body one 2, the shaft body two 3 and the shaft body three 4 will also rotate out together with the screw body 1. After that, if the components of the multi-layer shaft pin screw need to be repaired or replaced, the operation can be performed in the opposite order of assembly. First, the shaft body three 4 is disassembled from the shaft body two 3. The inner thread two 401 of the upper part of the shaft body three 4 is separated from the outer thread column two 301 of the shaft body two 3 by rotating the shaft body three 4 in the opposite direction. Then, the shaft body two 3 is disassembled from the shaft body one 2. The inner thread one 302 of the upper part of the shaft body two 3 is separated from the outer thread column one 204 of the shaft body one 2 by rotating the shaft body two 3 in the opposite direction. Finally, the shaft body one 2 is disassembled from the screw body 1. The outer thread column one 204 of the shaft body one 2 is separated from the outer thread 103 of the column body 102 of the screw body 1 by rotating the shaft body one 2 in the opposite direction.

Claims

1. A multi-layered axle pin screw, comprising: The utility model provides a screw body (1), it is characterized by: the surface nesting of screw body (1) is provided with shaft body one (2), the bottom threaded connection of shaft body one (2) has shaft body two (3), the bottom threaded connection of shaft body two (3) has shaft body three (4).

2. A multi-layered axle pin screw as defined in claim 1, wherein: The screw body (1) is composed of a screw head (101) and a column (102), the upper end of the screw head (101) is provided with a screw hole (104), the screw hole (104) is internally hexagonal, the surface of the column (102) is provided with external threads (103), and the column (102) is threadedly connected with the shaft body one (2), the shaft body two (3) and the shaft body three (4) through the external threads (103).

3. A multi-layered axle pin screw as defined in claim 2, wherein: The shaft body one (2) is composed of a fixed disc (201), a connecting column (202) and an external threaded column one (204), the bottom of the fixed disc (201) is fixedly connected with the connecting column (202), a plurality of connecting blocks (203) are fixedly installed on the surface of the connecting column (202), the upper end of each connecting block (203) is fixedly connected with the bottom of the fixed disc (201), the bottom of the connecting column (202) is fixedly connected with the external threaded column one (204), the outer surface of the external threaded column one (204) is threadedly connected with the shaft body two (3), the internal threaded column one (204) is threadedly connected with the external threads (103), and the upper end of the fixed disc (201) is provided with a socket (205), which is nested on the outer surface of the column (102).

4. A multi-layered axle pin screw as defined in claim 3, wherein: The bottom of the shaft body two (3) is fixedly provided with an external threaded column two (301), the external threaded column two (301) is threadedly connected with the shaft body three (4), and the internal threaded column one (302) is arranged in the shaft body two (3).

5. A multi-layered axle pin screw as defined in claim 4, wherein: The internal threaded column one (302) is divided into upper and lower parts, the upper half of the internal threaded column one (302) is threadedly connected with the external threaded column one (204), and the lower half of the internal threaded column one (302) is smaller in diameter than the external threaded column one (204) and is matched with the external threads (103).

6. A multi-layered axle pin screw as defined in claim 4, wherein: The internal threaded column two (401) is arranged in the shaft body three (4), and the upper half of the internal threaded column two (401) is threadedly connected with the external threaded column two (301), and the lower half of the internal threaded column two (401) is smaller in diameter than the external threaded column two (301) and is matched with the external threads (103).

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