Detachable segmented screw

Abstract

The utility model relates to the related field of screws, and discloses a detachable segmented screw which comprises a clamping head, the inner wall of the clamping head is connected with a connecting rod through a limiting assembly, the limiting assembly comprises a pressure spring fixedly connected with the inner wall of the clamping head, and the left end of the pressure spring is fixedly connected with a pressing plate. Sliding grooves are formed in the upper side and the lower side of the inner wall of the compression spring, a first screw rod is fixedly connected to the left end of the connecting rod, a fixing rod is fixedly connected to the inner wall of the first screw rod, an internal thread is formed in the left end of the fixing rod, a second screw rod is arranged at the left end of the first screw rod, and a stud is fixedly connected to the right end of the second screw rod. According to the utility model, the second screw rod and the first screw rod can be installed through the stud and the internal thread, and the first screw rod and the clamping head can be installed through the limiting assembly, so that the whole thread is divided into three parts, and the damaged end of the screw rod or the damaged rod body can be directly replaced in the use process; and the whole screw does not need to be replaced.

Description

Technical Field

[0001] The utility model relates to the field of screw rods, in particular to a detachable segmented screw rod. Background Art

[0002] The screw is a common mechanical component, usually cylindrical in shape with spiral protrusions on the surface. This spiral protrusion is called a thread. It achieves various functions through rotational motion, such as conveying materials, transmitting power, applying pressure, etc., and is widely used in many different fields.

[0003] After searching, the detachable and replaceable multi-purpose screw structure of announcement number CN205130307U includes a screw main section and a mounting section and a discharge section which are detachably connected to the head and tail ends of the screw main section respectively; the screw main section includes a fixed section, a feeding section, a compression and melting section and a mixing section, the head end of the fixed section is provided with a first splicing section, and the tail end of the mixing section is provided with a second splicing section; the mounting section has a third splicing section and an assembly section for adapting and connecting with a rotation and injection drive device on an injection molding device; the head end of the discharge section is provided with a fourth splicing section; the first splicing section of the screw main section is detachably assembled on the third splicing section of the mounting section; thereby, by designing the one-piece screw of the traditional technology into a multi-section split assembly structure, maintenance and replacement are facilitated and the use cost is reduced; at the same time, this detachable screw structure can form a variety of screws of different diameters for the same injection molding machine to produce different products, saving the purchase cost of the injection molding machine;

[0004] Based on the above patent, the one-piece screw of the traditional technology is designed into a multi-section split assembly structure to facilitate maintenance and replacement and reduce the cost of use. However, the screw is assembled by relying on the elastic positioning protrusion to be clamped in the positioning groove. During the working process of the screw, the detachable part is easily detached from the elastic positioning protrusion from the positioning groove due to continuous rotation, resulting in low stability of the screw. In this regard, to address this technical problem, the present application proposes a detachable segmented screw. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a detachable segmented screw, in which the second screw can be installed with the first screw by meshing the thread on the outer wall of the stud with the internal thread inside the fixed rod, and the first screw can be installed with the clamping head by means of a limit assembly, so that the entire thread is divided into three parts. During use, whether the screw end or the rod body is damaged, it can be directly replaced without replacing the entire screw.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A detachable segmented screw includes a clamping head, the inner wall of the clamping head is connected to a connecting rod through a limit assembly, the left end of the connecting rod is fixedly connected to a first screw, the inner wall of the first screw is fixedly connected to a fixing rod, the left end of the fixing rod is provided with an internal thread, the left end of the first screw is provided with a second screw, and the right end of the second screw is fixedly connected to a stud.

[0008] Furthermore, the limiting assembly includes a compression spring fixedly connected to the inner wall of the clamping head, a pressure plate is fixedly connected to the left end of the compression spring, and sliding grooves are provided on both the upper and lower sides of the inner wall of the compression spring.

[0009] Furthermore, the inner walls of the chute are provided with limit blocks, and the relative ends of the limit blocks are fixedly connected to the front and rear ends of the connecting rod respectively.

[0010] Furthermore, the size of the inner wall of the clamping head matches the connecting rod, the outer wall of the pressure plate is slidably connected to the inner wall of the clamping head, and the size of the sliding groove matches the limit block.

[0011] Furthermore, a slot is provided on the inner wall of the first screw rod, and a reinforcing layer is fixedly connected to the right end of the second screw rod.

[0012] Furthermore, the size of the reinforcement layer matches the slot, and the external thread on the stud matches the internal thread.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the present invention, the second screw and the first screw are installed by meshing the thread on the outer wall of the stud with the internal thread inside the fixing rod, and the first screw and the clamping head are installed by the limit assembly, so that the entire thread is divided into three parts. During use, whether the screw end or the rod body is damaged, it can be directly replaced without replacing the entire screw.

[0015] 2. In the present invention, when the second screw and the first screw are assembled to form the rod body, the reinforcing layer on the second screw is inserted into the slot inside the first screw, thereby increasing the contact area between the second screw and the inside of the first screw, improving the strength of the connection between the second screw and the first screw, reducing the possibility of breakage, and extending the service life of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a detachable segmented screw proposed in the utility model;

[0017] Figure 2 This is a schematic structural diagram of the first screw in a detachable segmented screw proposed in the utility model;

[0018] Figure 3This is a schematic structural diagram of the second screw in a detachable segmented screw proposed in the present invention;

[0019] Figure 4 This is a cross-sectional view of a clamping head in a detachable segmented screw proposed by the utility model.

[0020] Legend:

[0021] 1. Clamping head; 2. First screw; 3. Second screw; 4. Slot; 5. Fixing rod; 6. Internal thread; 7. Reinforcement layer; 8. Stud; 9. Connecting rod; 10. Limit block; 11. Slide; 12. Pressure plate; 13. Compression spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figure 4 , the utility model provides an embodiment: a detachable segmented screw, including a clamping head 1, the inner wall of the clamping head 1 is connected to the connecting rod 9 through a limit assembly, the limit assembly includes a compression spring 13 fixedly connected to the inner wall of the clamping head 1, the left end of the compression spring 13 is fixedly connected to a pressure plate 12, and the upper and lower sides of the inner wall of the compression spring 13 are provided with slide grooves 11, and the inner walls of the slide grooves 11 are provided with limit blocks 10. The opposite ends of the limit blocks 10 are fixedly connected to the front and rear ends of the connecting rod 9 respectively, the size of the inner wall of the clamping head 1 matches the connecting rod 9, the outer wall of the pressure plate 12 is slidably connected to the inner wall of the clamping head 1, and the size of the slide groove 11 matches the limit block 10;

[0024] Specifically, when the first screw 2 is broken and damaged and needs to be replaced, the entire screw is first removed from the device, and then the first screw 2 is pushed into the inside of the clamping head 1, so that the limit block 10 disengages from the groove inside the clamping head 1 and pushes the pressure plate 12, and then the first screw 2 is rotated so that the limit block 10 is aligned with the slide groove 11, and then the first screw 2 can be pulled to make the limit block 10 slide out along the slide groove 11 to separate the connecting rod 9 from the clamping head 1 to complete the disassembly of the first screw 2, and then the limit block 10 on the new first screw 2 is aligned with the slide groove 11 and inserted into the first screw 2. After squeezing the pressure plate 12, the first screw 2 is rotated. During the rotation process, the compression spring 13 will continuously apply elastic force to the pressure plate 12 on the limit block 10 until the limit block 10 is rotated to align with the internal groove of the clamping head 1 and is elastically stuck in, completing the installation of the first screw 2.

[0025] Reference Figure 1-3, the left end of the connecting rod 9 is fixedly connected to the first screw 2, the inner wall of the first screw 2 is fixedly connected to the fixing rod 5, the left end of the fixing rod 5 is provided with an internal thread 6, the left end of the first screw 2 is provided with a second screw 3, the right end of the second screw 3 is fixedly connected to a stud 8, the inner wall of the first screw 2 is provided with a slot 4, the right end of the second screw 3 is fixedly connected to a reinforcing layer 7, the size of the reinforcing layer 7 fits the slot 4, and the external thread on the stud 8 is adapted to the internal thread 6;

[0026] Specifically, if the second screw 3 is damaged and needs to be replaced, the second screw 3 is directly rotated to remove it from the first screw 2, and then the reinforcing layer 7 on the new second screw 3 is aligned with the slot 4 on the first screw 2 and inserted, and rotated so that the external thread on the stud 8 is engaged with the internal thread 6 inside the fixing rod 5, and the second screw 3 is installed on the first screw 2. The reinforcing layer 7 is inserted into the slot 4 to increase the contact area between the second screw 3 and the inside of the first screw 2, thereby increasing the strength of the connection between the second screw 3 and the first screw 2 and extending the service life of the screw.

[0027] Working principle: First, align the reinforcing layer 7 on the second screw 3 with the slot 4 on the first screw 2 and insert the second screw 3, so that the external thread on the stud 8 is engaged with the internal thread 6 inside the fixing rod 5, and the installation of the second screw 3 and the first screw 2 is completed. The reinforcing layer 7 inserted into the slot 4 can increase the contact area of ​​the connection between the second screw 3 and the first screw 2 and improve the overall strength. The thread of the stud 8 is opposite to the thread direction of the outer wall of the second screw 3 and the first screw 2, ensuring that the second screw 3 will not fall off during the operation of the screw, and then the first screw 2 is installed. The limit block 10 on the screw 2 is inserted into the clamping head 1 along the slide groove 11, pushing the pressure plate 12 to squeeze the compression spring 13, and then the first screw 2 is rotated to make the limit block 10 rotate inside the clamping head 1 until it is aligned with the internal groove of the clamping head 1. At this time, the pressure plate 12 will push the limit block 10 into the groove under the elastic force of the compression spring 13, completing the installation of the first screw 2 and the clamping head 1, so that the entire thread is divided into three parts. During use, whether the screw end or the rod body is damaged, it can be directly replaced without replacing the entire screw.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A detachable segmented screw, characterized in that: The invention comprises a clamping head (1), wherein the inner wall of the clamping head (1) is connected to a connecting rod (9) via a limit assembly, the left end of the connecting rod (9) is fixedly connected to a first screw rod (2), the inner wall of the first screw rod (2) is fixedly connected to a fixing rod (5), the left end of the fixing rod (5) is provided with an internal thread (6), the left end of the first screw rod (2) is provided with a second screw rod (3), and the right end of the second screw rod (3) is fixedly connected to a stud (8).

2. The detachable segmented screw according to claim 1, characterized in that: The limiting assembly comprises a compression spring (13) fixedly connected to the inner wall of the clamping head (1), a pressure plate (12) being fixedly connected to the left end of the compression spring (13), and sliding grooves (11) being provided on both upper and lower sides of the inner wall of the compression spring (13).

3. The detachable segmented screw according to claim 2, characterized in that: The inner wall of the slide groove (11) is provided with a limit block (10), and the limit block (10) is fixedly connected to the front and rear ends of the connecting rod (9) at one opposite end.

4. The detachable segmented screw according to claim 2, characterized in that: The size of the inner wall of the clamping head (1) matches the size of the connecting rod (9), the outer wall of the pressure plate (12) is slidably connected to the inner wall of the clamping head (1), and the size of the sliding groove (11) matches the size of the limit block (10).

5. The detachable segmented screw according to claim 1, characterized in that: A slot (4) is provided on the inner wall of the first screw rod (2), and a reinforcing layer (7) is fixedly connected to the right end of the second screw rod (3).

6. The detachable segmented screw according to claim 5, characterized in that: The size of the reinforcement layer (7) matches the slot (4), and the external thread on the stud (8) matches the internal thread (6).

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