A screw connection structure

Abstract

The present invention discloses a screw connection structure, which belongs to the technical field of elevator equipment. The screw connection structure includes a hollow upper screw and a lower screw that need to be connected, and the upper screw has the same outer diameter as the lower screw; the inner surface of the lower screw is threadedly connected with a bolt connecting rod, and the bolt connecting rod is sequentially sleeved with a guide sleeve and a clamping structure from bottom to top, and the clamping structure is used to fix the guide sleeve. The present application connects the guide sleeve and the clamping structure together through a bolt connecting rod, which can effectively transmit the torque generated by the shaking of the screw, making the screw connection more secure, achieving advantages such as high positioning accuracy and good coaxiality; the setting of the guide sleeve and the transmission assembly can ensure the coaxiality of the upper and lower screws, and improve the centering and positioning accuracy of adjacent screws.

Description

Technical Field

[0001] The invention relates to the technical field of elevator equipment, and in particular to a screw rod connection structure. Background Art

[0002] With the continuous advancement of urban modernization and the increasing aging of the population structure, home elevators are favored by more and more users. Home elevators have the characteristics of humanization, personalization, safety, energy saving and environmental protection, providing a convenient and comfortable means of transportation for modern high-quality life consumers.

[0003] Common home elevators include traction elevators and screw elevators. Screw elevators are more popular due to their high space utilization, safety and reliability. The common connection method for the screw of a screw elevator is to drill two screws and connect them with locking bolts. Due to vibration and other reasons, the locking bolt connection is easy to loosen, which is not conducive to the smooth passage of the drive nut and is prone to accidents. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a screw connection structure, which can effectively prevent the screw connection from loosening and ensure that the driving nut can pass smoothly.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a screw rod connection structure, comprising a hollow upper screw rod and a lower screw rod to be connected, wherein the upper screw rod and the lower screw rod have the same outer diameter;

[0007] The inner surface of the lower screw rod is threadedly connected with a bolt connecting rod, and a guide sleeve and a clamping structure are sequentially sleeved on the bolt connecting rod from bottom to top. The clamping structure is used to fix the guide sleeve, and the guide sleeve is an external spline structure.

[0008] Furthermore, the screw connection structure also includes a transmission component for transmitting the torque generated by the shaking of the screw.

[0009] Furthermore, the transmission component is a flat key, a keyway is formed between the outer surface of the guide sleeve and the upper screw rod and the lower screw rod, and the flat key is arranged in the keyway.

[0010] Preferably, the top of the guide sleeve is convex to form an upper outer edge, the bottom of the guide sleeve is convex to form a lower outer edge, and the flat key is arranged between the upper and lower outer edges.

[0011] Preferably, the upper outer edge of the guide sleeve is in close contact with the inner surface of the upper screw rod; the lower outer edge of the guide sleeve is in close contact with the inner surface of the lower screw rod.

[0012] Furthermore, the transmission assembly is composed of two groups of pins, and the two groups of pins pass through the upper screw rod and the lower screw rod respectively and are fixed together with the guide sleeve.

[0013] Furthermore, the clamping structure includes a compression ring and a compression cap. The compression ring is a hollow structure with threads on its outer surface, which is threadedly connected and fixed to the inner surface of the upper screw rod. The compression cap is arranged on the top of the compression ring, and is threadedly connected to the upper end of the bolt connecting rod to clamp the compression ring.

[0014] Furthermore, a socket is provided at the bottom of the upper screw rod, and a shaft shoulder matching the socket is provided at the top of the lower screw rod, and the upper screw rod and the lower screw rod are plugged together through the socket and the shaft shoulder.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, adjacent screws are connected by a connecting structure arranged inside the hollow screw, wherein the guide sleeve and the clamping structure are connected together by a bolt connecting rod, so that the structure is more compact, and the advantages of high positioning accuracy and good coaxiality are achieved; the setting of the guide sleeve can ensure the coaxiality of the upper and lower screws, and at the same time, the transmission assembly arranged between the guide sleeve and the upper and lower screws improves the centering and positioning accuracy of adjacent screws. The present application can effectively prevent the connection from loosening, improve the coaxiality of adjacent screws, and ensure the smooth passage of the drive nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The screw connection structure of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The screw connection structure of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 The screw connection structure of the present invention is shown in FIG. Figure 3 ;

[0020] Figure 4 for Figure 1 Sectional view of AA. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0022] The present invention provides a screw connection structure, see Figure 1-4 , including a hollow upper screw rod 1 and a lower screw rod 7 to be connected, and the upper screw rod 1 and the lower screw rod 7 have the same outer diameter;

[0023] The inner surface of the lower screw rod 7 is threadedly connected with a bolt connecting rod 4, and a guide sleeve 5 and a clamping structure are sequentially sleeved on the bolt connecting rod 4 from bottom to top. The clamping structure is used to fix the guide sleeve 5, and the guide sleeve 5 is an external spline structure.

[0024] In the present invention, adjacent screws are connected by a connecting structure arranged inside the hollow screw, wherein the guide sleeve and the clamping structure are connected together by a bolt connecting rod, so that the structure is more compact, high positioning accuracy and good coaxiality are achieved; the setting of the guide sleeve can ensure the coaxiality of the upper and lower screws. The present application can effectively prevent the connection from loosening, improve the coaxiality of adjacent screws, and ensure the smooth passage of the driving nut.

[0025] Furthermore, the screw connection structure also includes a transmission component 6 for transmitting the torque generated by the shaking of the screw.

[0026] In one embodiment of the present invention, the transmission component 6 is a flat key. Figure 2 A keyway is formed between the outer surface of the guide sleeve 5 and the upper screw 1 and the lower screw 7, and a flat key is arranged in the keyway. The top of the guide sleeve 5 is convex to form an upper outer edge 8, and the bottom of the guide sleeve 5 is convex to form a lower outer edge 9. The upper outer edge 8 of the guide sleeve 5 is in close contact with the inner surface of the upper screw 1; the lower outer edge 9 of the guide sleeve 5 is in close contact with the inner surface of the lower screw 7. The flat key is arranged between the upper and lower outer edges. The arrangement of the flat key can transmit the torque generated by the shaking of the screw, and at the same time improve the centering of the upper and lower screws, so that it has better positioning accuracy.

[0027] In another embodiment of the present invention, the transmission assembly 6 is two sets of pins. Figure 3 The two sets of pins pass through the upper screw rod 1 and the lower screw rod 7 respectively and are fixed together with the guide sleeve 5.

[0028] It should be noted that the transmission component may be a structure for transmitting torque that can be thought of by those skilled in the art, and will not be described one by one here.

[0029] Furthermore, the clamping structure includes a pressing ring 3 and a pressing cap 2. The pressing ring 3 is a hollow structure with a thread on the outer surface, which is fixedly connected to the inner surface of the upper screw rod 1 through a thread. The pressing cap 2 is arranged on the top of the pressing ring 3, and the pressing cap 2 is threadedly connected to the upper end of the bolt connecting rod 4 to clamp the pressing ring 3. The pressing cap clamps the pressing ring, thereby clamping the guide sleeve, making the structure more compact, with high positioning accuracy and good coaxiality.

[0030] Furthermore, a socket is provided at the bottom of the upper screw rod 1, and a shoulder matching the socket is provided at the top of the lower screw rod 7. The upper screw rod 1 and the lower screw rod 7 are plugged together through the socket and the shoulder. The upper and lower screw rods have the same outer diameter, which can make the upper and lower screw rods more firmly connected and prevent loosening.

[0031] In summary, the present application uses a bolted connecting rod to connect the guide sleeve and the compression rod together, which can effectively transmit the torque generated by the shaking of the screw and make the screw connection more secure.

[0032] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A screw connection structure, characterized in that: It includes a hollow upper screw and a lower screw that need to be connected, and the upper screw has the same outer diameter as the lower screw; The inner surface of the lower screw rod is threadedly connected with a bolt connecting rod, and a guide sleeve and a clamping structure are sequentially sleeved on the bolt connecting rod from bottom to top, and the clamping structure is used to fix the guide sleeve, and the guide sleeve is an external spline structure; The screw connection structure also includes a transmission component for transmitting the torque generated by the shaking of the screw; The transmission component is a flat key, a keyway is formed between the outer surface of the guide sleeve and the upper screw and the lower screw, and the flat key is arranged in the keyway; The top of the guide sleeve is convex to form an upper outer edge, the bottom of the guide sleeve is convex to form a lower outer edge, and the flat key is arranged between the upper and lower outer edges; The clamping structure includes a clamping ring and a clamping cap. The clamping ring is a hollow structure with threads on its outer surface, which is threadedly connected and fixed with the inner surface of the upper screw rod. The clamping cap is arranged on the top of the clamping ring, and is threadedly connected with the upper end of the bolt connecting rod to clamp the clamping ring. The upper outer edge of the guide sleeve is in close contact with the inner surface of the upper screw; the lower outer edge of the guide sleeve is in close contact with the inner surface of the lower screw; The bottom of the upper screw rod is provided with a plug hole, the top of the lower screw rod is provided with a shaft shoulder matching the plug hole, and the upper screw rod and the lower screw rod are plugged together through the plug hole and the shaft shoulder.

2. The screw connection structure according to claim 1, characterized in that: The transmission assembly is composed of two groups of pins, which pass through the upper screw rod and the lower screw rod respectively and are fixed together with the guide sleeve.

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