Simple lead screw assembly tool

Abstract

The utility model discloses a simple lead screw assembling tool which comprises a base, a hand-cranking sleeve is coaxially installed on the top of the base, a lower threaded column is assembled in the hand-cranking sleeve in a threaded mode, the lower end of the lower threaded column penetrates through the base, and the upper end of the lower threaded column is connected with an upper threaded column. The connecting area of the lower threaded column and the upper threaded column is provided with a nut in a threaded mode, a plurality of balls are arranged in the nut, and the height position of the lower threaded column and the height position of the upper threaded column relative to the nut are adjusted through the hand-cranking sleeve. According to the simple lead screw assembly tool, the installation difficulty is reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of tooling, and in particular to a simple lead screw assembly tooling. Background Technology

[0002] Ball screws circulate balls through a groove between the nut and the screw shaft. Due to their unique structure, installation requires consideration of ball fixation, the fit between the ball screw and the shaft groove, and the installation of components such as seals. This results in a lengthy installation process, a low tolerance for error, and a high demand for skilled and proficient installers.

[0003] The current main installation method is as follows: First, insert a sleeve into the center of the nut; then manually guide the balls into the nut groove; next, find the thread angle by fitting the sleeve onto the shaft end; then screw the nut onto the lead screw shaft; finally, screw in the sealing rings and fixing components from both ends for installation. This installation method has the following drawbacks:

[0004] The previous method required manual alignment and adjustment using a sleeve, which made it impossible to precisely guarantee the coaxiality of the sleeve and the inner diameter of the nut. This resulted in uneven clearance between the sleeve and the nut groove, easily leading to installation errors such as ball jamming and ball falling out, wear on the groove, deformation of the balls, and ultimately affecting the accuracy of the lead screw itself. This invention provides a double-threaded structure, which seals the bottom with a lower thread to ensure installation coaxiality and prevent ball jamming and falling out.

[0005] Second, the final installation process using a sleeve fitted onto the shaft end is cumbersome. To ensure proper thread engagement between the nut and the shaft, a suitable angle needs to be found, and the sealing ring needs to be installed from both ends. This invention replaces the smooth surface of the sleeve with a corresponding thread groove identical to that of the lead screw shaft, greatly simplifying the installation process.

[0006] Thirdly, if the sleeve is inserted and installed directly from the bottom of the thread in one go, and balls become stuck or fall off in the middle, it must be reinstalled. This utility model provides a layered installation method, which ensures that the balls are installed correctly on each turn of the thread, reducing the probability of errors during installation. Utility Model Content

[0007] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0008] Therefore, this utility model proposes a simple lead screw assembly fixture to reduce installation difficulty and improve installation efficiency.

[0009] A simple lead screw assembly fixture according to an embodiment of the present utility model includes a base, a hand-cranked sleeve coaxially mounted on the top of the base, a lower threaded post threaded on the inner thread of the hand-cranked sleeve, the lower end of the lower threaded post passing through the base, and an upper threaded post connected to the upper end of the lower threaded post. A nut containing several balls is threadedly fitted in the connection area between the lower threaded post and the upper threaded post. The height position of the lower threaded post and the upper threaded post relative to the nut is adjusted by the hand-cranked sleeve.

[0010] The beneficial effects of this utility model are as follows: the simple lead screw assembly fixture adopts a double-thread structure, with the upper threaded post responsible for engaging with the lead screw nut groove to fix the ball bearings, and the lower threaded post used to maintain the coaxiality of the upper threaded post and the lead screw nut groove; it adopts a layered installation structure, and by controlling the height of the lower threaded post, it can prevent the ball bearings from falling to the bottom, achieving installation along the groove turn by turn; it adopts a detachable structural design, allowing the upper threaded post to be separated for lead screw nut installation; it can freely combine the upper and lower threaded posts to adapt to the installation of different models of lead screws; it adopts an adjustable hand-cranked sleeve to prevent the lead screw nut from naturally unscrewing during installation, and, together with the handle, accurately controls the installation height and adjusts the ball bearing installation position.

[0011] According to one embodiment of the present invention, the lower threaded post includes a lower threaded post body, the surface of the lower threaded post body is provided with a lower threaded post thread, and the top end of the lower threaded post body is coaxially provided with a lower threaded post mounting post.

[0012] According to one embodiment of the present invention, the upper threaded column includes an upper threaded column body, the side wall of the upper threaded column body is provided with an upper threaded column thread, the bottom end of the upper threaded column body is provided with an upper threaded column mounting slot that matches the lower threaded column mounting column, and the top end of the upper threaded column body is provided with an upper threaded column mounting groove. When the nut is installed on the lead screw shaft, the end of the lead screw shaft engages with the upper threaded column mounting groove.

[0013] According to one embodiment of the present invention, the nut includes a nut body, a nut channel is provided in the middle area of ​​the inner wall of the nut body, and a sealing ring mounting groove located on the inner side and a sealing element slot located on the outer side are provided at both the upper and lower ends of the inner wall of the nut body. A washer is provided on the lower end face of the nut body, and the washer is located at the contact point between the hand-cranked sleeve and the nut.

[0014] According to one embodiment of the present invention, the base includes a base body, a detachable support column is installed on the lower surface of the base body, a base sleeve is provided on the upper surface of the base body, and a through hole is provided on the base body to communicate with the base sleeve and to allow the lower threaded column to pass through.

[0015] According to one embodiment of the present invention, the hand-cranked sleeve includes a hand-cranked sleeve body, a hand-cranked sleeve handle is provided on the outer wall of the hand-cranked sleeve body, and a hand-cranked sleeve threaded groove is provided on the inner wall of the hand-cranked sleeve body.

[0016] According to one embodiment of the present invention, a gap is formed between the concave structure of the upper threaded column and the nut groove to guide the movement of the ball.

[0017] According to one embodiment of the present invention, the protruding structure of the lower threaded column thread cooperates with the nut groove to fix the upper threaded column and prevent the balls from falling out.

[0018] According to one embodiment of the present invention, the inner diameter of the sealing ring mounting groove and the inner diameter of the sealing element slot are both larger than the bottom diameter of the nut groove to prevent interference with the lower threaded post.

[0019] According to one embodiment of the present invention, the upper threaded post mounting slot and the lower threaded post mounting post are fitted with a clearance fit to prevent interference when the lower threaded post and the upper threaded post rotate.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram of the simplified lead screw assembly fixture of this utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the decomposed structure;

[0025] Figure 3 yes Figure 1 The front view;

[0026] Figure 4 yes Figure 3 Sectional view at point AA;

[0027] Figure 5 yes Figure 4 A magnified view of a section at point E in the middle;

[0028] Figure 6 yes Figure 4 A magnified view of a section at point G in the middle;

[0029] Figure 7 This is a structural diagram of the base;

[0030] Figure 8 This is a schematic diagram of the structure of a hand-cranked socket;

[0031] Figure 9 This is a schematic diagram of the structure of the threaded column;

[0032] Figure 10 This is an assembly diagram of the lower threaded post, the nut, and the upper threaded post;

[0033] Figure 11 yes Figure 10 A schematic diagram of the decomposed structure;

[0034] Figure 12 This is a schematic diagram of the assembly of the nut and the upper threaded post;

[0035] Figure 13 This is a schematic diagram of the structure of the first sealing ring;

[0036] Figure 14 This is a schematic diagram of the second sealing ring;

[0037] Figure 15 This is a schematic diagram of a nut-mounted shaft. Figure 1 ;

[0038] Figure 16 This is a schematic diagram of a nut-mounted shaft. Figure 2 .

[0039] The labels in the diagram are:

[0040] 1. Base; 1-1. Detachable support column for the base; 1-2. Base sleeve; 1-3. Base body; 1-4. Through hole;

[0041] 2. Hand-cranked socket; 2-1. Hand-cranked socket handle; 2-2. Threaded groove of the hand-cranked socket; 2-3. Hand-cranked socket body;

[0042] 3. Lower threaded post; 3-1. Lower threaded post thread; 3-2. Lower threaded post mounting post; 3-3. Lower threaded post body;

[0043] 4. Nut; 4-1. Nut groove; 4-2. Sealing ring mounting groove; 4-3. Sealing element groove; 4-4. Washer; 4-5. First sealing ring; 4-5-1. First threaded inner ring; 4-5-2. First sealing ring outer circle; 4-6. Second sealing ring; 4-6-1. Second threaded inner ring; 4-6-2. Second sealing ring outer circle; 4-7. Leadscrew shaft; 4-7-1. Leadscrew shaft end; 4-7-2. Leadscrew shaft threaded groove; 4-8. Nut body;

[0044] 5. Ball bearings; 5-1. Ball bearing entry point;

[0045] 6. Upper threaded post; 6-1. Upper threaded post mounting slot; 6-2. Upper threaded post thread; 6-3. Upper threaded post mounting slot opening; 6-4. Upper threaded post body. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0047] In the description of this utility model, it should be understood that the terms "one side", "the other side", "both sides", "between", "middle", "upper end", "lower end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] The following describes a simple lead screw assembly fixture according to an embodiment of the present invention with reference to the accompanying drawings.

[0050] See Figure 1-16This utility model discloses a simple lead screw assembly fixture, comprising a base 1, a hand-cranked sleeve 2 coaxially mounted on the top of the base 1, a lower threaded post 3 threaded internally threaded onto the hand-cranked sleeve 2, the lower end of the lower threaded post 3 passing through the base 1, and an upper threaded post 6 connected to the upper end of the lower threaded post 3. A nut 4, containing several balls 5, is threadedly fitted at the connection area between the lower threaded post 3 and the upper threaded post 6. The height of the lower threaded post 3 and the upper threaded post 6 relative to the nut 4 is adjusted by the hand-cranked sleeve 2. The base 1 supports the entire assembly, the lower threaded post 3 connects to the upper threaded post 6, and engages with the nut 4 to accommodate the balls 5. The hand-cranked sleeve 2 is used to adjust the height of the threaded post relative to the nut 4, achieving hierarchical assembly. Specifically, the balls 5 are steel balls.

[0051] like Figure 4 As shown, the ball entry point 5-1 is guided by the rotation of the upper threaded post 6 to continuously feed the ball 5 into the nut 4.

[0052] The lower threaded post 3 includes a lower threaded post body 3-3, the surface of which is provided with a lower threaded post thread 3-1, and the top end of the lower threaded post body 3-3 is coaxially provided with a lower threaded post mounting post 3-2.

[0053] The upper threaded post 6 includes an upper threaded post body 6-4, with an upper threaded post thread 6-2 on the side wall of the upper threaded post body 6-4. The bottom end of the upper threaded post body 6-4 has an upper threaded post mounting slot 6-3 that matches the lower threaded post mounting post 3-2. The top end of the upper threaded post body 6-4 has an upper threaded post mounting groove 6-1. When the lead screw nut 4 is installed onto the lead screw shaft 4-7, the lead screw shaft end 4-7-1 of the lead screw shaft 4-7 engages with the upper threaded post mounting groove 6-1. That is, the upper threaded post mounting groove 6-1 is used to engage with the lead screw shaft end 4-7-1 when the lead screw nut 4 is finally installed onto the lead screw shaft 4-7.

[0054] The nut 4 includes a nut body 4-8. A nut groove 4-1 is provided in the middle area of ​​the inner wall of the nut body 4-8. Both the upper and lower ends of the inner wall of the nut body 4-8 are provided with a sealing ring mounting groove 4-2 located on the inner side and a sealing element slot 4-3 located on the outer side. A washer 4-4 is provided on the lower end face of the nut body 4-8. The washer 4-4 is located at the contact point between the hand-cranked sleeve 2 and the nut 4.

[0055] like Figure 7 As shown, the base 1 includes a base body 1-3. A detachable support column 1-1 is mounted on the lower surface of the base body 1-3, and a base sleeve 1-2 is provided on the upper surface of the base body 1-3. A through hole 1-4 is provided on the base body 1-3, which communicates with the base sleeve 1-2 and allows the threaded post 3 to pass through. The detachable support column 1-1 can be replaced and adjusted according to the length of the nut 4 to be installed. The base sleeve 1-2 is used to position the upper hand-cranked sleeve 2, ensuring that it always rotates around the axis during use.

[0056] like Figure 8 As shown, the hand-cranked socket 2 includes a hand-cranked socket body 2-3, a hand-cranked socket handle 2-1 on the outer wall of the hand-cranked socket body 2-3, and a hand-cranked socket threaded groove 2-2 on the inner wall of the hand-cranked socket body 2-3. The hand-cranked socket handle 2-1 is used to manually control the height of the threaded post and also allows the installer to clearly observe the number of turns.

[0057] like Figure 5 As shown, the concave structure of the upper threaded post 6-2 forms a gap with the nut groove 4-1 to guide the movement of the ball 5. The convex structure of the lower threaded post 3-1 cooperates with the nut groove 4-1 to fix the upper threaded post 6 and prevent the ball 5 from falling out.

[0058] like Figure 4 and Figure 6 As shown, the nut 4 has a sealing ring mounting groove 4-2 and a sealing element retaining groove 4-3 at each end. The sealing ring mounting groove 4-2 is used for subsequent installation of the sealing ring, and the sealing element retaining groove 4-3 is used for subsequent installation of the sealing ring fixing component. The inner diameter of both the sealing ring mounting groove 4-2 and the sealing element retaining groove 4-3 is larger than the bottom diameter of the nut groove 4-1 to prevent interference with the lower threaded post 3. A washer 4-4 is installed at the contact point between the hand-cranked sleeve 2 and the nut 4 to prevent wear on the surface of the nut 4 during rotation of the hand-cranked sleeve 2. The threaded groove 2-2 of the hand-cranked sleeve mates with the lower threaded post 3 to control the overall raising and lowering of the mechanism.

[0059] like Figure 10 and Figure 11 As shown, the upper threaded post mounting slot 6-3 and the lower threaded post mounting post 3-2 are fitted with a clearance fit to prevent interference when the lower threaded post 3 and the upper threaded post 6 rotate. The purpose is to ensure that the rotation of the upper and lower threaded posts does not interfere with each other, and to facilitate subsequent installation and disassembly.

[0060] like Figure 12 , Figure 13 and Figure 14 As shown, after removing the upper threaded post 6 and the nut 4 with the balls 5 installed together, the first sealing ring 4-5 and the second sealing ring 4-6 need to be installed into the nut groove from both ends. The inner ring of the first sealing ring 4-5 is the first threaded inner ring 4-5-1, and the inner ring of the second sealing ring 4-6 is the second threaded inner ring 4-6-1. They need to be inserted into the groove of the lead screw shaft 4-7 for installation. However, this device uses the threaded post as a sleeve, which allows the sealing rings to be installed before the shaft is installed. The outer circles 4-5-2 of the first sealing ring and 4-6-2 of the second sealing ring are smooth and... Figure 6 The two sealing rings of the middle thread nut 4 are fitted into the mounting grooves 4-2.

[0061] like Figure 15 and Figure 16 As shown, in this process, the upper threaded post 6 acts as a sleeve, inserting the lead screw shaft end 4-7-1 of the lead screw shaft 4-7 into the upper threaded post mounting groove 6-1. This fit also adopts a clearance fit to facilitate the rotation of the threaded post and find the installation angle. After aligning the lead screw shaft thread groove 4-7-2 with the groove of the upper threaded post thread 6-2, the nut 4 is screwed in to complete the installation.

[0062] This invention primarily addresses problems encountered during lead screw installation, such as ball bearing blockage, difficulty in thread alignment, and difficulty in installing the sealing ring. The invention replaces the smooth surface of the sleeve with a threaded groove, which not only cooperates and fixes with the installed ball bearing 5 but also aligns with the 4-7-1 thread on the lead screw shaft end, facilitating the overall installation of the sealing ring and the nut 4, reducing installation difficulty and improving efficiency. Furthermore, it employs a double-helix structure, ensuring installation stability while allowing for adjustable installation height and enabling tiered installation.

[0063] This invention uses a threaded lower threaded post 3 and a threaded nut 4 to fix an upper threaded post 6 at the bottom. Compared with traditional sleeves, this provides better center positioning, reduces the risk of ball jamming, and allows for smoother ball insertion. The invention utilizes the groove of the upper threaded post to fix the ball 5, resulting in stronger installation stability. The end threads and grooves also make installing the lead screw shaft 4-7 faster. The threaded post design allows for the installation of sealing rings and fasteners before shaft installation, greatly improving lead screw installation efficiency. The invention employs a layered installation method, avoiding installation jamming caused by too many balls 5 entering at once. This invention features a detachable structure, making it compatible with various models of lead screw shafts 4-7.

[0064] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A simple lead screw assembly fixture, characterized in that: The device includes a base (1), on the top of which a hand-cranked sleeve (2) is coaxially mounted. The hand-cranked sleeve (2) is threaded with a lower threaded post (3). The lower end of the lower threaded post (3) passes through the base (1). The upper end of the lower threaded post (3) is connected to an upper threaded post (6). The connection area between the lower threaded post (3) and the upper threaded post (6) is threaded with a nut (4) containing several balls (5). The height of the lower threaded post (3) and the upper threaded post (6) relative to the nut (4) is adjusted by the hand-cranked sleeve (2).

2. The simplified lead screw assembly fixture according to claim 1, characterized in that: The lower threaded post (3) includes a lower threaded post body (3-3), the surface of the lower threaded post body (3-3) is provided with a lower threaded post thread (3-1), and the top end of the lower threaded post body (3-3) is coaxially provided with a lower threaded post mounting post (3-2).

3. The simplified lead screw assembly fixture according to claim 2, characterized in that: The upper threaded column (6) includes an upper threaded column body (6-4), an upper threaded column thread (6-2) is provided on the side wall of the upper threaded column body (6-4), an upper threaded column mounting slot (6-3) matching the lower threaded column mounting column (3-2) is provided at the bottom end of the upper threaded column body (6-4), and an upper threaded column mounting groove (6-1) is provided at the top end of the upper threaded column body (6-4). When the nut (4) is installed on the lead screw shaft (4-7), the lead screw shaft end (4-7-1) of the lead screw shaft (4-7) engages with the upper threaded column mounting groove (6-1).

4. The simplified lead screw assembly fixture according to claim 3, characterized in that: The nut (4) includes a nut body (4-8). A nut channel (4-1) is provided in the middle area of ​​the inner wall of the nut body (4-8). Both the upper and lower ends of the inner wall of the nut body (4-8) are provided with a sealing ring mounting groove (4-2) located on the inner side and a sealing element slot (4-3) located on the outer side. A washer (4-4) is provided on the lower end face of the nut body (4-8). The washer (4-4) is located at the contact point between the hand-cranked sleeve (2) and the nut (4).

5. The simplified lead screw assembly fixture according to claim 1, characterized in that: The base (1) includes a base body (1-3), a detachable support column (1-1) is installed on the lower surface of the base body (1-3), a base sleeve (1-2) is provided on the upper surface of the base body (1-3), and a through hole (1-4) is provided on the base body (1-3) to communicate with the base sleeve (1-2) and to allow the lower threaded column (3) to pass through.

6. The simplified lead screw assembly fixture according to claim 1, characterized in that: The hand-cranked sleeve (2) includes a hand-cranked sleeve body (2-3), a hand-cranked sleeve handle (2-1) is provided on the outer wall of the hand-cranked sleeve body (2-3), and a hand-cranked sleeve threaded groove (2-2) is provided on the inner wall of the hand-cranked sleeve body (2-3).

7. A simplified lead screw assembly fixture according to claim 4, characterized in that: The concave structure of the upper threaded column thread (6-2) and the nut groove (4-1) form a gap to guide the movement of the ball (5).

8. A simplified lead screw assembly fixture according to claim 4, characterized in that: The protruding structure of the lower threaded column (3-1) cooperates with the nut groove (4-1) to fix the upper threaded column (6) and prevent the ball (5) from falling off.

9. A simplified lead screw assembly fixture according to claim 4, characterized in that: The inner diameter of the sealing ring mounting groove (4-2) and the inner diameter of the sealing element slot (4-3) are both larger than the bottom diameter of the nut groove (4-1) to prevent interference with the lower threaded post (3).

10. A simplified lead screw assembly fixture according to claim 3, characterized in that: The upper threaded post mounting slot (6-3) and the lower threaded post mounting post (3-2) are fitted with a clearance to prevent interference when the lower threaded post (3) and the upper threaded post (6) rotate.

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