Tensioning device for building block type screw

Abstract

The utility model relates to a tensioning device for a building block type screw. The tensioning device comprises a stretching piece, a pressing piece, a telescopic piece and a driving piece. The stretching piece is used for being connected with a locking piece of the building block type screw. The pressing piece is used for being connected with a thread element of the building block type screw. One end of the telescopic piece is connected with the stretching piece, and the other end of the telescopic piece is connected with the pressing piece; the driving part is connected with the telescopic part and used for driving the telescopic part to do telescopic motion. Compared with the prior art, the tensioning piece and the pressing piece only transmit axial force to the shaft core and the thread element, so that the transmission efficiency of the tensioning force is high, and compared with a radial screwing mode of a traditional torque wrench, radial load is not borne between the shaft core and the thread element, and the torque wrench is simple in structure and convenient to use. The problem that the friction coefficient is increased due to torsional deformation of the thread element and the shaft core spline is solved.

Description

Technical Field

[0001] The utility model relates to the field of screw rod installation tools, in particular to a tensioning device for a building block type screw rod. Background Art

[0002] Parallel twin-screw extruders are widely used for filling, blending, modifying, and reinforcing rubber, plastic, and engineering resins; devolatilizing chlorinated polypropylene and superabsorbent resins; extruding biodegradable masterbatches, polyamide polycondensation, and polyurethane polyaddition reactions; granulating carbon powder and magnetic powders; and preparing cable insulation and sheathing materials, low-smoke, low-halogen, flame-retardant PVC cable materials, and various silane cross-linking materials. Their unique feature is the use of two parallel-rotating screws to shear, melt, mix, and extrude the raw materials into shape. With the increasing market demand for high torque, high speed, and high output, the development of parallel twin-screw extruders is also evolving.

[0003] In this development, the modular screw, a key component of the parallel twin-screw extruder, plays a crucial role. It employs a "building blocks"-like structure, with multiple different screw elements serially connected and secured to a core shaft. The assembled screw must withstand high torque from the drive unit while rotating at high speeds. Consequently, the modular screw places extremely high demands on its torsional resistance, stability, and machining precision.

[0004] Traditional modular screw tensioning methods typically achieve this by applying a specific preload force to the screw head and nut. However, due to the multiple threaded elements connected in series on the modular screw and the unevenness of the preload process, such as the thread contact state, torque accuracy, and operator experience, it is difficult to meet the requirements of high speed, high torque, and high production.

[0005] Therefore, this paper proposes to design a new type of building block screw tensioning device, aiming to ensure that the threaded elements of the building block screw are subjected to uniform contact pressure, thereby reducing stress concentration, improving the torsional stiffness and load-bearing capacity of the screw, and ensuring that the screw can operate stably and efficiently under high torque and high load working conditions. Utility Model Content

[0006] The purpose of the present invention is to provide a tensioning device for a building block screw in order to overcome the defects of the prior art.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A tensioning device for a building block screw, comprising:

[0009] A tensile member, the tensile member being used to connect with the locking member of the building block screw;

[0010] A pressing member, the pressing member being used to connect with the threaded element of the modular screw;

[0011] a telescopic member, one end of which is connected to the stretching member, and the other end of which is connected to the pressing member;

[0012] A driving member is connected to the telescopic member and is used to drive the telescopic member to move telescopically.

[0013] In one embodiment, a threaded hole is provided on the tensile member, and one end of the locking member can be inserted into the threaded hole and threadedly connected to the tensile member.

[0014] In one embodiment, the telescopic member includes an inner telescopic ring sleeved on the stretching member and an outer telescopic ring sleeved on the inner telescopic ring. A shoulder is provided on the end of the stretching member away from the locking member, the inner telescopic ring abuts against the shoulder, and the outer telescopic ring is connected to the clamping member.

[0015] In one embodiment, the clamping member is a clamping ring, which is sleeved on the stretching member, one end of the clamping ring abuts against the outer telescopic ring, and the other end of the clamping ring is used to abut against the end face of the threaded element.

[0016] In one embodiment, the tensioning device further includes a fixing assembly, which is sleeved on the outer telescopic ring and abuts against two ends of the outer telescopic ring respectively.

[0017] In one embodiment, the fixing assembly includes a first fixing ring and a second fixing ring connected to each other, the first fixing ring is sleeved on the outer telescopic ring and abuts against one end face and an outer peripheral surface of the outer telescopic ring respectively, the second fixing ring is sleeved on the outer telescopic ring and abuts against the other end face and an outer peripheral surface of the outer telescopic ring respectively, the stretching member and the inner telescopic ring can move through the first fixing ring, and the pressing member can move through the second fixing ring.

[0018] In one embodiment, the tensioning device further includes a protective sleeve, which is sleeved on the clamping ring and connected to the clamping ring.

[0019] In one embodiment, the locking member includes a locking stud and a locking nut, one end of the locking stud is connected to the shaft core of the building block screw, and the other end of the locking stud can be connected to the tensile member, the locking nut is threadedly connected to the locking stud and abuts against the threaded element, and the clamping ring and the protective sleeve are correspondingly provided with a first operating hole and a second operating hole, and the nut can be rotated through the first operating hole and the second operating hole in sequence.

[0020] In one embodiment, a lifting ring is provided on the fixing assembly.

[0021] In one embodiment, a mounting plate is provided on the fixing assembly, and the hanging ring is provided with a threaded mounting portion, and the threaded mounting portion is threadedly connected to the mounting plate.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] 1. The above-mentioned tensioning device is provided with a tensile member and a pressing member connected to the locking member and the threaded element respectively, and a telescopic member is provided between the tensile member and the pressing member. During use, the tensile member is first connected to the locking member and the pressing member is connected to the threaded element, and then the telescopic member is controlled to extend by the driving member to drive the tensile member and the pressing member to move relatively away from each other, so that the locking member drives the shaft core and the threaded element to move relative to each other, and compresses the multiple threaded elements connected in series on the shaft core, and further tightens the locking member to abut the threaded element, thereby completing the tensioning of the building block screw; since the telescopic member controls the tensile member and the pressing member to move axially through telescoping, the tensile member and the pressing member only transmit axial force to the shaft core and the threaded element, so that the tensioning force transmission efficiency is high. Compared with the radial tightening method of the traditional torque wrench, the shaft core and the threaded element do not bear radial load, avoiding problems such as increased friction coefficient due to torsional deformation of the threaded element and the shaft core spline.

[0024] 2. A threaded hole is provided on the tensile member, and the tensile member is threadedly connected to the locking member through the threaded hole, which is conducive to adapting to the general structure of the locking member, improving the reliability of the connection between the tensile member and the locking member, and improving the bearing capacity of the connection during the tensioning process.

[0025] 3. The telescopic part includes an inner telescopic ring and an outer telescopic ring that can move relatively. The clamping part is a clamping ring. Both are mounted on the tensile part, and the tensile part is provided with a shoulder. Therefore, by making the inner telescopic ring abut against the shoulder and the outer telescopic ring abut against the clamping ring, the tensile part and the clamping part can be driven to move relative to each other, effectively improving the ease of use of the tensioning device.

[0026] 4. The fixing assembly is used to limit the axial position and radial position of the telescopic ring, and is provided with a first fixing ring and a second fixing ring connected to each other to limit the upper and lower ends of the outer telescopic ring respectively. The structure is simple and easy to disassemble.

[0027] 5. The protective sleeve is connected to the clamping ring. When in use, one end is sleeved on the clamping ring and the other end is sleeved on the threaded element to prevent interference between other components of the tensioning device and the threaded element. At the same time, a first operating hole and a second operating hole are correspondingly provided on the clamping ring and the protective sleeve. After the threaded element on the shaft core is tightened, the operating tool can pass through the first operating hole and the second operating hole to rotate the locking piece, and tighten the locking piece again to finally achieve tensioning of the building block screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the front view of the tensioning device in the utility model.

[0029] Figure 2 It is a bottom view of the tensioning device in the present utility model.

[0030] Figure 3 It is a cross-sectional view of the tensioning device in the utility model.

[0031] Figure 4 This is a cross-sectional view of the tensioning device and the building block screw in the present invention when connected.

[0032] Figure 5 It is a cross-sectional view of the building block screw in the utility model.

[0033] Figure 6 This is a three-dimensional diagram of the tensioning device and the building block screw in the utility model when connected.

[0034] Figure 7 It is a schematic flow chart of the building block type screw tensioning method in the utility model.

[0035] Figure numerals: 100, tensioning device; 10, stretching member; 11, threaded hole; 12, shoulder; 20, pressing member; 21, first operating hole; 30, telescopic member; 31, inner telescopic ring; 32, outer telescopic ring; 40, driving member; 50, fixing assembly; 51, first fixing ring; 52, second fixing ring; 60, protective sleeve; 61, second operating hole; 70, lifting ring; 80, building block screw; 81, locking member; 811, locking stud; 812, locking nut; 82, threaded element; 83, shaft core; 84, screw cap. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0037] A tensioning device 100 for a modular screw rod 80 in some embodiments will be described in detail below with reference to the accompanying drawings.

[0038] like Figures 1 to 6 As shown, in one embodiment, a tensioning device 100 for a building block screw 80 is provided, comprising a tensioning member 10, a pressing member 20, a telescopic member 30 and a driving member 40;

[0039] Among them, the tensile member 10 is used to connect with the locking member 81 of the building block screw 80; the pressing member 20 is used to connect with the threaded element 82 of the building block screw 80; one end of the telescopic member 30 is connected to the tensile member 10, and the other end of the telescopic member 30 is connected to the pressing member 20; the driving member 40 is connected to the telescopic member 30, and is used to drive the telescopic member 30 to telescopic movement.

[0040] The tensioning device 100 is provided with a tensile member 10 and a pressing member 20 connected to the locking member 81 and the threaded element 82 respectively, and a telescopic member 30 is provided between the tensile member 10 and the pressing member 20. During use, the tensile member 10 is first connected to the locking member 81, and the pressing member 20 is connected to the threaded element 82. Then, the telescopic member 30 is controlled to extend by the driving member 40, driving the tensile member 10 and the pressing member 20 to move relatively away from each other, so that the locking member 81 drives the shaft core 83 and the threaded element 82 to move relative to each other, and the multiple threaded elements connected in series on the shaft core 83 are connected. 82 is compressed, and the locking member 81 is further tightened to abut the threaded element 82, so that the building block screw 80 can be tensioned; since the telescopic member 30 controls the axial movement of the tensile member 10 and the pressing member 20 through telescopic control, the tensile member 10 and the pressing member 20 only transmit axial force to the shaft core 83 and the threaded element 82, so that the tensioning force transmission efficiency is high. Compared with the radial tightening method of the traditional torque wrench, the shaft core 83 and the threaded element 82 do not bear radial load, avoiding the problem of increased friction coefficient due to torsional deformation of the spline of the threaded element 82 and the shaft core 83.

[0041] Specifically, if Figure 3 and Figure 4 As shown, in one embodiment, the tensioning member 10 is provided with a threaded hole 11, and one end of the locking member 81 can be inserted into the threaded hole 11 and threadedly connected to the tensioning member 10. The provision of the threaded hole 11 on the tensioning member 10 and the threaded connection with the locking member 81 through the threaded hole 11 facilitates adaptation to the general structure of the locking member 81, improves the reliability of the connection between the tensioning member 10 and the locking member 81, and increases the bearing capacity of the connection during the tensioning process.

[0042] Specifically, if Figure 3 and Figure 4 As shown, in one embodiment, the telescopic member 30 includes an inner telescopic ring 31 sleeved on the tensile member 10 and an outer telescopic ring 32 sleeved on the inner telescopic ring 31. A shoulder 12 is provided on the end of the tensile member 10 away from the locking member 81. The inner telescopic ring 31 abuts against the shoulder 12, and the outer telescopic ring 32 is connected to the clamping member 20.

[0043] Among them, the telescopic part 30 includes a hydraulic telescopic cylinder, a pneumatic telescopic cylinder and an electric telescopic cylinder. Preferably, the telescopic part 30 is a hydraulic telescopic cylinder, and a liquid containing chamber is provided between the inner telescopic ring 31 and the outer telescopic ring 32. The driving part 40 is a hydraulic pump, and the hydraulic pump is connected to the liquid containing chamber through a hose. Therefore, the tensioning pressure can be set by the hydraulic pump, and a specific tensioning pressure can be achieved by injecting a specific volume of liquid into the hydraulic telescopic cylinder through the hydraulic pump.

[0044] Furthermore, if Figure 3 and Figure 4 As shown, in one embodiment, the compression member 20 is a compression ring, which is sleeved on the tensile member 10. One end of the compression ring abuts against the outer telescopic ring 32, and the other end of the compression ring is used to abut against the end face of the threaded element 82. The telescopic member 30 includes an inner telescopic ring 31 and an outer telescopic ring 32 that are relatively movable. The compression member 20 is a compression ring, which is sleeved on the tensile member 10. The tensile member 10 is provided with a shoulder 12. Therefore, by abutting the inner telescopic ring 31 against the shoulder 12 and the outer telescopic ring 32 against the compression ring, the tensile member 10 and the compression member 20 can be driven to move relative to each other, effectively improving the ease of use of the tensioning device 100.

[0045] Furthermore, if Figure 2 、 Figure 3 and Figure 4 As shown, in one embodiment, the tensioning device 100 further includes a fixing assembly 50 . The fixing assembly 50 is sleeved on the outer telescopic ring 32 and abuts against both ends of the outer telescopic ring 32 .

[0046] In this specific embodiment, Figure 3 and Figure 4 As shown, the fixing assembly 50 includes a first fixing ring 51 and a second fixing ring 52 that are interconnected. The first fixing ring 51 is mounted on the outer telescopic ring 32 and abuts against one end face and the outer circumference of the outer telescopic ring 32. The second fixing ring 52 is mounted on the outer telescopic ring 32 and abuts against the other end face and the outer circumference of the outer telescopic ring 32. The tensioning member 10 and the inner telescopic ring 31 can move through the first fixing ring 51, and the pressing member 20 can move through the second fixing ring 52. The fixing assembly 50 is used to limit the axial and radial positions of the telescopic ring. The first fixing ring 51 and the second fixing ring 52 are connected to each other to respectively limit the upper and lower ends of the outer telescopic ring 32. It has a simple structure and is easy to disassemble.

[0047] Among them, the first fixing ring 51 and the second fixing ring 52 are connected by bolts and nuts. The bolts pass through the first fixing ring 51 and the second fixing ring 52 in sequence and are connected to the nuts, which facilitates the installation and disassembly of the fixing assembly 50 and the replacement of the telescopic part 30.

[0048] Furthermore, if Figure 1 、 Figure 2 and Figure 3 As shown, in one embodiment, the tensioning device 100 further includes a protective sleeve 60, which is mounted on and connected to the compression ring. The protective sleeve 60 is connected to the compression ring. During use, one end of the protective sleeve 60 is mounted on the compression ring and the other end is mounted on the threaded element 82 to prevent interference between other components of the tensioning device 100 and the threaded element 82.

[0049] In this specific embodiment, Figure 2 、 Figure 3 and Figure 5 As shown, in one embodiment, the locking member 81 includes a locking stud 811 and a locking nut 812. One end of the locking stud 811 is connected to the shaft core 83 of the modular screw 80, and the other end of the locking stud 811 can be connected to the tensioning member 10. The locking nut 812 is threadedly connected to the locking stud 811 and abuts against the threaded element 82. The first operating hole 21 and the second operating hole 61 are correspondingly provided on the clamping ring and the protective sleeve 60. The nut can be rotated through the first operating hole 21 and the second operating hole 61 in sequence. At the same time, the first operating hole 21 and the second operating hole 61 are correspondingly provided on the clamping ring and the protective sleeve 60. After the threaded element 82 on the shaft core 83 is tightened, an operating tool can be passed through the first operating hole 21 and the second operating hole 61 to rotate the locking member 81 and tighten the locking member 81 again, ultimately achieving tensioning of the modular screw 80.

[0050] The protective sleeve 60 is connected to the clamping ring by screws, and the screws pass through the protective sleeve 60 and the outer wall of the clamping ring in sequence.

[0051] Specifically, if Figure 1 、 Figure 2 and Figure 3 As shown, in one embodiment, a lifting ring 70 is provided on the fixing assembly 50. The fixing assembly 50 is provided with a mounting plate, the ends of which are respectively connected to the first fixing ring 51 and the second fixing ring 52. The lifting ring 70 is provided with a bolt connection portion, which is threadedly connected to the mounting plate through the bolt connection portion. The lifting ring 70 is used to suspend or store the tensioning device 100, and the threaded connection portion makes the lifting ring 70 easy to install and remove.

[0052] like Figure 7 As shown, in one embodiment, a method for tensioning a modular screw 80 is provided, using the tensioning device 100 described above, including the following specific steps:

[0053] S10: A plurality of threaded elements 82 are sequentially sleeved on the shaft core 83 of the modular screw 80, and a locking member 81 is installed on the end surface of the shaft core 83 so that the locking member 81 abuts against the end surface of the threaded element 82;

[0054] S20: Connecting the tensioning member 10 of the tensioning device 100 to the locking member 81;

[0055] S30: Connecting the pressing member 20 of the tensioning device 100 to the threaded element 82;

[0056] S40: controlling the extension of the telescopic member 30 of the tensioning device 100 through the driving member 40;

[0057] S50 : The driving member 40 is used to maintain the extended state of the telescopic member 30 , and the locking member 81 is operated to abut against the end surface of the threaded element 82 again.

[0058] Specifically, if Figure 5 As shown, after step S50, the following steps are also included: installing a screw cap 84 on the locking member 81, the screw cap 84 is used to close the gap between the shaft core 83 and the threaded element 82 to prevent the plastic melt from entering the gap when the building block screw 80 is working.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0062] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0063] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0064] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A tensioning device for a building block screw, characterized in that: include: A tensile member (10), the tensile member (10) being used to connect with a locking member (81) of a building block screw (80); A pressing member (20), the pressing member (20) being used to connect with the threaded element (82) of the modular screw (80); a telescopic member (30), one end of the telescopic member (30) being connected to the stretching member (10), and the other end of the telescopic member (30) being connected to the pressing member (20); A driving member (40) is connected to the telescopic member (30) and is used to drive the telescopic member (30) to perform telescopic movement.

2. A tensioning device for a building block screw according to claim 1, characterized in that: The stretching member (10) is provided with a threaded hole (11), and one end of the locking member (81) can be inserted into the threaded hole (11) and is threadedly connected to the stretching member (10).

3. A tensioning device for a building block screw according to claim 1, characterized in that: The telescopic member (30) includes an inner telescopic ring (31) sleeved on the stretching member (10) and an outer telescopic ring (32) sleeved on the inner telescopic ring (31); a shoulder (12) is provided on one end of the stretching member (10) away from the locking member (81); the inner telescopic ring (31) abuts against the shoulder (12); and the outer telescopic ring (32) is connected to the pressing member (20).

4. A tensioning device for a building block screw according to claim 3, characterized in that: The clamping member (20) is a clamping ring, which is sleeved on the stretching member (10). One end of the clamping ring abuts against the outer telescopic ring (32), and the other end of the clamping ring abuts against the end face of the threaded element (82).

5. A tensioning device for a building block screw according to claim 3, characterized in that: The tensioning device further comprises a fixing assembly (50), wherein the fixing assembly (50) is sleeved on the outer telescopic ring (32) and respectively abuts against two ends of the outer telescopic ring (32).

6. A tensioning device for a building block screw according to claim 5, characterized in that: The fixing assembly (50) includes a first fixing ring (51) and a second fixing ring (52) connected to each other. The first fixing ring (51) is sleeved on the outer telescopic ring (32) and abuts against one end face and an outer peripheral surface of the outer telescopic ring (32). The second fixing ring (52) is sleeved on the outer telescopic ring (32) and abuts against the other end face and an outer peripheral surface of the outer telescopic ring (32). The stretching member (10) and the inner telescopic ring (31) can move through the first fixing ring (51), and the pressing member (20) can move through the second fixing ring (52).

7. A tensioning device for a building block screw according to claim 4, characterized in that: The tensioning device further comprises a protective sleeve (60), which is sleeved on the clamping ring and connected to the clamping ring.

8. A tensioning device for a building block screw according to claim 7, characterized in that: The locking member (81) includes a locking stud (811) and a locking nut (812), one end of the locking stud (811) is connected to the shaft core (83) of the building block screw (80), and the other end of the locking stud (811) can be connected to the tensile member (10), the locking nut (812) is threadedly connected to the locking stud (811) and abuts against the threaded element (82), and the clamping ring and the protective sleeve (60) are correspondingly provided with a first operating hole (21) and a second operating hole (61), and the nut can be rotated through the first operating hole (21) and the second operating hole (61) in sequence.

9. A tensioning device for a building block screw according to claim 5, characterized in that: The fixing assembly (50) is provided with a hanging ring (70).

10. A tensioning device for a building block screw according to claim 9, characterized in that: The fixing assembly (50) is provided with a mounting plate, and the hanging ring (70) is provided with a threaded mounting portion, and the threaded mounting portion is threadedly connected to the mounting plate.

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