Locking and positioning screw sleeve

Abstract

The utility model provides a locking and positioning screw sleeve which comprises a screw sleeve body, the outer side wall of the screw sleeve body is provided with external threads, and the inner side of the screw sleeve body is provided with an internal thread hole. Four inserting grooves which penetrate through the upper end and are spaced in the circumferential direction are formed in the thread sleeve body in the axial direction, and bolts are inserted into the grooves. The upper end of the thread insert body is provided with a coaxial connecting disc which is larger than the thread insert body in diameter. The limiting mechanism comprises a limiting cap with an opening in the lower side, the limiting cap is connected to the connecting disc in a matched mode, the limiting cap is provided with a first through hole corresponding to the inner threaded hole and a second through hole corresponding to the inserting groove, the first through hole and the second through hole can rotate in the circumferential direction and are fixedly connected in the axial direction, the second through hole corresponds to the inserting groove initially so that the bolt can be inserted conveniently, and the limiting cap is rotated to lock the bolt in a staggered mode after insertion. The outer side wall of the connecting disc is provided with an annular positioning groove, and the side wall of the limiting cap is provided with corresponding positioning holes and positioning pins to ensure axial fixation. The thread sleeve effectively solves the problem of looseness of a traditional thread sleeve, is stable in connection, convenient to install, high in universality and suitable for fastening requirements of equipment in multiple fields.

Description

TECHNICAL FIELD

[0001] The utility model relates to hardware fastener technical field, concretely relates to a locking positioning screw sleeve. BACKGROUND

[0002] In the field of mechanical connection, as a common connecting piece, screw sleeve is widely used in various devices, and its role is to enhance the strength and reliability of threaded connection. In practical application, a hole connected with the screw sleeve is usually arranged on the device part, and the screw sleeve is connected in the hole through threaded cooperation. However, in some occasions with high connection strength requirements, it is difficult to meet the demand only by relying on threaded connection.

[0003] In order to strengthen the structural strength of the connection between the screw sleeve and the device part, the existing technology usually adopts the mode that a slot is arranged on the outer side wall of the screw sleeve, and a bolt is connected in the slot. After the bolt is installed, extrusion deformation is formed between the screw sleeve and the hole wall, so as to increase the friction between them, thereby strengthening the connection. To some extent, this mode improves the stability of the connection and solves the problem of insufficient connection strength.

[0004] However, in the long-term use process, the above connection mode exposes obvious defects under the influence of factors such as equipment vibration and impact. The most prominent problem is that the bolt is prone to looseness. Once the bolt loosens, the extrusion deformation formed between the screw sleeve and the hole wall will weaken, which leads to the decrease of the friction between them, and further leads to the decrease of the connection strength between the screw sleeve and the device part. This not only may affect the normal operation of the equipment, but also may cause safety accidents in serious cases. For example, in some mechanical equipment running at high speed or bearing large load, the bolt loosening may lead to the screw sleeve falling off, so that the relative position between the device parts changes, causing equipment failure.

[0005] In summary, although the mode for strengthening the connection strength between the screw sleeve and the device part by the bolt in the prior art solves the problem of insufficient connection strength to some extent, due to the defect that the bolt is prone to looseness, it has great limitations in practical application, and a new technical scheme is urgently needed to solve this problem. SUMMARY

[0006] In view of the problems pointed out in the background art, the utility model provides a locking positioning screw sleeve to solve the above technical problems.

[0007] The technical scheme of the utility model is realized as follows:

[0008] A locking positioning screw sleeve, comprising a screw sleeve body, a plug-in slot is arranged on the outer side wall of the screw sleeve body along the axial direction thereof, the plug-in slot penetrates through the upper end of the screw sleeve body, a bolt is connected in the plug-in slot, and a limiting mechanism capable of limiting the upward movement of the bolt is arranged at the upper end of the screw sleeve body.

[0009] The utility model further sets up, the limit mechanism includes limit cap, limit cap is set up with the downside opening, the upper end of the screw bush body is equipped with the annular connecting disc, the diameter of connecting disc is greater than the diameter of screw bush body, and the plug -in slot is set up through connecting disc, connecting disc is connected in the limit cap, the upper lateral wall of limit cap is equipped with the through -hole no.

[0010] The utility model further sets up, the outer lateral wall of connecting disc is equipped with the annular positioning slot, the lateral wall of limit cap is equipped with the positioning hole corresponding with positioning slot, positioning pin is connected in the positioning hole, and positioning pin inserts the positioning slot.

[0011] The utility model further sets up, the plug -in slot is equipped with four, and four plug -in slots are set up at the circumference of screw bush body.

[0012] The utility model further sets up, the positioning hole is equipped with four, and four positioning holes are set up at the circumference of limit cap.

[0013] The utility model further sets up, the through -hole no.

[0014] The utility model further sets up, the connecting disc and the inner chamber of limit cap are matched and set up.

[0015] The utility model further sets up, in the radial direction of screw bush body, the length of plug -in slot is less than the length of the bolt.

[0016] The utility model discloses the beneficial effects are:

[0017] First, in the connection stability aspect, the performance is outstanding. The traditional screw bush only relies on the thread connection equipment parts, and is easy to loosen under the long -term vibration, impact environment, and this screw bush adds the bolt and the unique limit mechanism. After the bolt inserts the plug -in slot of screw bush body outer lateral wall, forms the firm extrusion between screw bush and equipment part hole wall, greatly enhances the friction, effectively resists the displacement tendency in use. And the limit cap and connecting disc in the limit mechanism cooperate finely, initially facilitate the bolt insertion, and subsequently rotate limit cap and make the through -hole no.

[0018] Secondly, the reasonable structure design brings installation convenience. The external thread of the sleeve body allows it to be smoothly screwed into the corresponding hole of the equipment part to complete the preliminary positioning. The installation design of the latch is also thoughtful. With the structure of the connecting disc and the limiting cap, the latch can be easily inserted into the insertion slot from the initially corresponding through hole two without complex operation, reducing the installation difficulty and time cost, and being particularly friendly to large-scale assembly scenes.

[0019] Furthermore, it has strong versatility and wide adaptation. It has an internal thread hole and a through hole one for bolt connection, which can flexibly adapt to different specifications of bolts and meet the diversified equipment fastening needs. Whether it is a small precision instrument or a large industrial machine, as long as it involves reliable threaded connection, the sleeve can play a stable connection advantage to ensure the stable and efficient operation of the equipment, reduce the fault maintenance caused by connection problems, and improve the overall economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0021] Fig. 1 It is a structural schematic diagram of the present application.

[0022] Fig. 2 It is an exploded schematic diagram of the present application.

[0023] Fig. 3 It is a sectional view of the present application.

[0024] The reference numerals in the drawings are explained: sleeve body 1, insertion slot 2, latch 3, limiting cap 4, connecting disc 5, through hole one 6, through hole two 7, positioning groove 8, positioning hole 9, positioning pin 10. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] The following references are made Figs. 1-3 The present application is described as follows:

[0027] Embodiment: A locking positioning sleeve, comprising a sleeve body 1, the sleeve body 1 has an internal threaded hole, and an external thread is arranged on the outer side wall of the sleeve body 1. The sleeve body 1 is the core component of the whole structure, has an internal threaded hole, which is used for subsequent precise matching connection with a bolt to realize a fastening function, and is a key stress position in the whole connection system. The external thread arranged on the outer side wall of the sleeve body 1 enables the sleeve body to be screwed with a corresponding hole on a device part through a thread, to complete preliminary positioning and connection, and lay a foundation for subsequent further reinforcement operation.

[0028] An insertion slot 2 is arranged on the outer side wall of the sleeve body 1 along the axial direction, the number is four, and the insertion slots 2 are distributed in a circumferential direction. This layout mode not only ensures a relatively uniform reinforcement effect on the sleeve in the circumferential direction, but also avoids weakening the overall strength of the sleeve body due to too many slots. At the same time, the insertion slot 2 penetrates the upper end of the sleeve body 1, providing a channel for the insertion of the bolt 3, so that the bolt can smoothly enter the predetermined position and play a role in enhancing the stability of the connection.

[0029] The insertion slot 2 is connected with the bolt 3, and the main role of the bolt 3 is to form additional support and fastening force at the connection position of the sleeve and the device part. When the bolt is inserted, an extrusion effect is generated between the sleeve and the hole wall of the device part, the friction force between the two is increased, and the sleeve is effectively prevented from loosening or moving during use.

[0030] The upper end of the sleeve body 1 is provided with a limiting mechanism capable of limiting the axial upward movement of the bolt 3. In this way, the two ends of the bolt 3 are limited by the bottom of the insertion slot 2 and the limiting mechanism respectively, so that the bolt 3 and the sleeve body 1 are axially fixed, and the bolt 3 cannot be loosened.

[0031] The upper end of the sleeve body 1 is provided with an annular connecting disc 5, the connecting disc 5 is coaxially arranged with the sleeve body 1, and the diameter of the connecting disc 5 is greater than that of the sleeve body 1. The connecting disc 5 serves as an intermediate transition component connecting the sleeve body and the limiting cap, and also provides a stable support plane for the limiting cap.

[0032] The limiting mechanism comprises a limiting cap 4, the limiting cap 4 is arranged with an open lower side, the insertion slot 2 penetrates the connecting disc 5 (which ensures that the bolt 3 can be inserted from the corresponding position of the connecting disc 5), the connecting disc 5 is adaptively connected in the limiting cap 4, the upper side wall of the limiting cap 4 is provided with a through hole one 6 corresponding to the internal threaded hole of the sleeve body 1 (which enables the whole sleeve structure to be connected with the bolt smoothly through the through hole one 6 after the assembly of the sleeve structure is completed, without affecting the overall fastening assembly process), the upper side wall of the limiting cap 4 is provided with a through hole two 7 corresponding to the insertion slot 2, the limiting cap 4 and the connecting disc 5 are formed in a circumferential rotating connection, and the limiting cap 4 and the connecting disc 5 are formed in an axial fixed connection.

[0033] In the initial installation state, the through hole two 7 corresponds to the insertion slot 2, and the bolt 3 is inserted. When the bolt 3 is fully inserted, the limiting cap 4 is rotated to make the through hole two 7 and the insertion slot 2 misaligned. At this time, the solid part of the limiting cap 4 blocks the bolt 3 from being pulled out of the upper end of the insertion slot 2, thereby achieving strict restriction of the bolt in the axial direction and completely eliminating the possibility of bolt loosening due to external factors such as vibration and impact.

[0034] In summary, the locking positioning sleeve solves the problem of easy loosening of traditional sleeves by cleverly designing the sleeve body, bolt and limiting mechanism, providing reliable protection for the stable connection between equipment parts and meeting the needs of various application scenarios with high connection reliability requirements.

[0035] Only when the through hole two 7 corresponds to the insertion slot 2, the bolt 3 can be pulled out of the insertion slot 2.

[0036] The outer wall of the connecting disc 5 is provided with an annular positioning groove 8, and the corresponding limiting cap 4 side wall is provided with a positioning hole 9, and a positioning pin 10 is connected in the positioning hole 9. The positioning pin 10 is inserted into the positioning groove 8 to achieve the axial fixed connection of the limiting cap 4 and the connecting disc 5. This design strengthens the stability of the overall structure from multiple dimensions. On the one hand, the four positioning holes 9 are arranged at intervals in the circumferential direction of the limiting cap 4, which cooperates with the annular positioning groove 8 to make the limiting cap 4 and the connecting disc 5 bear force evenly in the circumferential direction, avoiding the displacement or loosening of the parts caused by uneven local stress. When the equipment is running, the positioning pin 10 can tightly abut against the inner wall of the positioning groove 8 to limit the axial movement of the limiting cap 4 relative to the connecting disc 5, thereby ensuring the continuous effectiveness of the bolt 3 limiting function.

[0037] On the other hand, compared with simply relying on the sleeve friction force between the limiting cap 4 and the connecting disc 5 to maintain axial fixation, the positioning pin and positioning groove structure provides more reliable mechanical limiting, greatly enhancing the stability of the entire limiting mechanism and ensuring the reliability of the sleeve connection under complex working conditions.

[0038] The through hole two 7 is in communication with the through hole one 6, which optimizes the functionality and convenience of the structure. From the perspective of assembly process, when the bolt needs to be installed, the communication of the through holes makes the operation more convenient, and the operator does not need to align two independent through holes, reducing the installation difficulty and time consumption and improving the assembly efficiency. At the same time, during the subsequent equipment maintenance and bolt disassembly, there is no need to pay extra attention to the relative position of the two through holes, which facilitates the direct operation of the tool and reduces the maintenance cost.

[0039] The length of the insertion slot 2 is less than the length of the insertion pin 3 in the radial direction of the sleeve body 1, which is of great significance. When the insertion pin 3 is inserted into the insertion slot 2, the two ends of the insertion pin will protrude out of the insertion slot, one end will abut against the hole wall of the equipment part to further enhance the extrusion effect and increase the friction force, and the other end can better cooperate with the limiting cap 4. Under the limiting of the limiting cap, the insertion pin is firmly clamped in the insertion slot, and even if it is impacted by a large external force, the insertion pin is difficult to come out, which ensures the fastening degree of the sleeve connection.

[0040] The working principle of the locking and positioning sleeve is as follows:

[0041] In the initial installation stage, the sleeve body 1 is screwed into the corresponding hole previously provided on the equipment part by means of the external threads on the outer side wall, realizing preliminary positioning and connection. At this time, the four insertion slots 2 (axially arranged and penetrating the upper end, distributed circumferentially) on the sleeve body 1 are aligned with the corresponding positions of the hole wall of the equipment part.

[0042] Then, since the connecting disc 5 is coaxial and integrally connected with the sleeve body 1, the insertion slots 2 penetratingly provided on the connecting disc 5 correspond to the positions of the insertion slots of the sleeve body 1, and at the same time, the lower opening of the limiting cap 4 is adapted to be connected on the connecting disc 5, and in the initial state, the through hole two 7 on the upper side wall of the limiting cap 4 is in a corresponding state with the insertion slot 2, which creates a convenient condition for the insertion of the insertion pin 3. The operator inserts the insertion pin 3 through the through hole two 7 and the insertion slot 2 in turn, and the radial length of the insertion pin 3 is greater than that of the insertion slot 2, so that the two ends of the insertion pin 3 extrude the hole wall of the equipment part and abut against the inner wall of the lower side of the limiting cap 4 respectively, forming a strong friction force between the sleeve and the hole wall, and preliminarily reinforcing the connection.

[0043] Subsequently, by rotating the limiting cap 4, since the limiting cap 4 is in circumferential rotational connection with the connecting disc 5, the through hole two 7 and the insertion slot 2 are out of position during the rotation, and at this time, the solid part of the limiting cap 4 blocks the insertion pin 3 from coming out of the upper end of the insertion slot 2, realizing the first axial limitation of the insertion pin 3.

[0044] At the same time, the annular positioning slot 8 on the outer side wall of the connecting disc 5 cooperates with the positioning pins 10 in the four positioning holes 9 spaced apart on the side wall of the limiting cap 4, the positioning pins 10 are tightly inserted into the positioning slot 8, and the limiting cap 4 and the connecting disc 5 are stably fixed and connected from the axial direction, preventing the limiting cap 4 from moving axially due to vibration and other factors, and further ensuring that the insertion pin 3 will not loosen, providing durable and reliable protection for the connection of the sleeve and the equipment part.

[0045] Finally, when connected with a bolt, the screwing operation of the bolt can be smoothly completed through the internal threaded hole of the sleeve body 1 and the through hole one 6 on the upper side wall of the limiting cap 4, further strengthening the overall fastening effect and meeting various stress requirements during equipment operation.

[0046] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A locking and positioning screw sleeve, comprising a screw sleeve body (1), wherein an insertion groove (2) is provided on the outer side wall of the screw sleeve body (1) along its axial direction, the insertion groove (2) is provided through the upper end of the screw sleeve body (1), and a pin (3) is connected in the insertion groove (2), characterized in that: The upper end of the screw sleeve body (1) is provided with a limiting mechanism capable of limiting the upward movement of the plug (3).

2. A locking positioning sleeve according to claim 1, characterized in that: The limiting mechanism comprises a limiting cap (4) which is provided with an open lower side, the upper end of the screw sleeve body (1) is provided with an annular connecting disc (5) having a diameter larger than that of the screw sleeve body (1), the plug-in slot (2) is arranged through the connecting disc (5), the connecting disc (5) is connected in the limiting cap (4), the upper side wall of the limiting cap (4) is provided with a through hole one (6) corresponding to the internal thread hole of the screw sleeve body (1), the upper side wall of the limiting cap (4) is provided with a through hole two (7) corresponding to the plug-in slot (2), the limiting cap (4) and the connecting disc (5) are formed into circumferential rotating connection, and the limiting cap (4) and the connecting disc (5) are formed into axial fixed connection.

3. A locking position sleeve according to claim 2, wherein: The outer side wall of the connecting disc (5) is provided with an annular positioning groove (8), the side wall of the limiting cap (4) is provided with a positioning hole (9) corresponding to the positioning groove (8), the positioning hole (9) is connected with a positioning pin (10), and the positioning pin (10) is inserted into the positioning groove (8).

4. The locking position sleeve according to claim 2, wherein: The plug-in slot (2) is provided with four plug-in slots (2) which are arranged at intervals in the circumferential direction of the screw sleeve body (1).

5. The locking position sleeve according to claim 3, wherein: The positioning hole (9) is provided with four positioning holes (9) which are arranged at intervals in the circumferential direction of the limiting cap (4).

6. The locking position sleeve according to claim 2, wherein: The through hole two (7) is arranged in communication with the through hole one (6).

7. The locking position sleeve according to claim 2, wherein: The connecting disc (5) and the inner cavity of the limiting cap (4) are adaptively arranged.

8. The locking position sleeve according to claim 1, wherein: In the radial direction of the screw sleeve body (1), the length of the plug-in slot (2) is smaller than that of the plug (3).

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