Hand wheel anti-falling structure stable in locking

Abstract

The utility model relates to a hand wheel anti-falling structure stable in locking, which comprises a guide rod, a clamping taper sleeve, a locking screw rod and a locking nut, one end of the locking screw rod is connected with the guide rod, the locking nut pushes the clamping taper sleeve to linearly move to the guide rod when rotating to lock the guide rod, a limiting groove is arranged on the periphery of the end part of the locking screw rod, and the limiting groove is matched with the clamping taper sleeve. The limiting groove is sequentially provided with a first limiting end face and a second limiting end face from the end away from the guide rod to the end close to the guide rod, a stop block is inserted into the limiting groove, and the stop block is sequentially provided with a positioning part limited between the first limiting end face and the second limiting end face and a connecting part located outside the limiting groove in the radial direction of the stop block. The connecting part is connected with the guide rod through the first fixing piece, and the positioning part abuts against the second limiting end face so that the locking screw can be locked to the guide rod. The positioning part is matched with the second limiting end face in an abutting mode, the abutting face is large, the stability of the locking screw connected to the guide rod is improved, the stop block is limited in the limiting groove and is not prone to loosening, and the stability is high.

Description

Technical Field

[0001] This utility model relates to the field of handwheel anti-fall, specifically to a locking and stable handwheel anti-fall structure. Background Technology

[0002] A handwheel is a manually operated rotary device, typically consisting of a circular wheel and a handle attached to it. Handwheels are widely used in various mechanical equipment and tools. Their main function is to adjust, control, or operate mechanical systems through manual rotation. The intuitive design of the handwheel allows the operator to easily control the mechanical device through hand rotation. This device is commonly found in machine tools, workbenches, lathes, manually operated valves, and adjusting instruments. Handwheels are usually designed with an easy-to-grip shape, allowing the operator to easily rotate them while providing sufficient feel and precision. The size, shape, and purpose of the handwheel can vary depending on specific application requirements.

[0003] The utility model patent with authorization announcement number CN221921634U discloses a safety anti-disengagement structure for locking handwheels. In this structure, the locking screw is movably connected to the guide rod via a shaft end nut. In actual application, the shaft end nut is prone to loosening, causing the screw and handwheel to fall together, resulting in insufficient safety. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a locking and stable handwheel anti-fall structure.

[0005] The technical solution adopted by this utility model is as follows: A locking and stable handwheel anti-fall structure includes a guide rod, a clamping cone sleeve, a locking screw, and a locking nut. One end of the locking screw is connected to the guide rod. When the locking nut is turned to lock the guide rod, it pushes the clamping cone sleeve to move linearly along the guide rod.

[0006] A limiting groove is provided on the outer periphery of the end of the locking screw. The limiting groove has a first limiting end face and a second limiting end face in sequence from the end away from the guide rod to the end near the guide rod. A stop block is inserted in the limiting groove. The stop block has a positioning part located between the first limiting end face and the second limiting end face in sequence along its radial direction, and a connecting part located outside the limiting groove. The connecting part is connected to the guide rod through a first fixing member, and the positioning part abuts against the second limiting end face to lock the locking screw onto the guide rod.

[0007] Preferably, one end of the connecting part extends to the guide rod to abut against the end face of the guide rod, the connecting part has at least one first hole through it along its axial direction, the guide rod is provided with at least an equal number of second screw holes at the relative positions of the first holes, and the tail end of the first fixing member passes through the first hole and is threadedly connected to the second screw hole.

[0008] Preferably, two limiting grooves are provided, and the two limiting grooves are located on both sides of the end of the locking screw.

[0009] The connecting part is semi-circular and has an insertion notch. During the process of the locking screw being inserted into the stop block from the insertion notch, the positioning part is inserted into the limiting groove to form an axial limit on the locking screw.

[0010] Preferably, the two limiting grooves have parallel bottom surfaces and are symmetrically distributed about the central axis. Two positioning parts are provided corresponding to the limiting grooves and are adapted to the shape of the limiting grooves. The relative bottom surfaces of the two positioning parts are parallel and form a sliding groove.

[0011] The locking screw is inserted into the stop block along the sliding groove, and the bottom surface of the limiting groove is clearance-fitted with the positioning part to restrict the relative rotation of the stop block and the locking screw.

[0012] Preferably, the upper end of the locking screw is provided with an axially extending anti-fall groove, which is located at the center of the two limiting grooves.

[0013] The clamping cone sleeve is provided with a positioning pin. When the locking nut is rotated to lock the guide rod, one end of the positioning pin is limited to the anti-fall groove, and the clamping cone sleeve moves linearly along the anti-fall groove guide rod.

[0014] Preferably, a positioning hole is provided above the clamping cone sleeve for inserting the end of the positioning pin. A positioning plunger is detachably fitted on the positioning pin. When the locking nut is unscrewed, the positioning plunger and the anti-fall groove are mutually limited. The limitation between the positioning plunger and the anti-fall groove is released by rotating the positioning plunger.

[0015] Preferably, it also includes a handwheel, wherein the handwheel and the locking nut are sequentially sleeved on one end of the clamping cone sleeve, and the locking nut and the handwheel are connected and fastened to the clamping cone sleeve by a second fixing member.

[0016] Preferably, the locking nut is provided with an annular groove that allows the locking nut and the clamping cone sleeve to rotate relative to each other. The second fixing member is a set screw. The clamping cone sleeve is provided with a third screw hole. The second fixing member is used to fasten the locking nut to the clamping cone sleeve. The second fixing member is tightened in the third screw hole, and the end of the second fixing member is inserted into the annular groove.

[0017] Preferably, the clamping cone sleeve has a central through hole extending axially. The central through hole has a first central hole portion and a second central hole portion coaxially arranged and connected from one end of the guide rod to one end of the handwheel. The diameter of the first central hole portion is smaller than the diameter of the second central hole portion, so that a first limiting step is formed between the two.

[0018] A clamping ring portion with a center hole adapted to the size of the locking screw is fitted between the locking screw and the clamping cone sleeve. The clamping ring portion has a first ring portion and a second ring portion arranged coaxially and connected from one end of the guide rod to one end of the handwheel. The outer diameter of the first ring portion is smaller than the outer diameter of the second ring portion, so that a second limiting step is formed between the two.

[0019] The first limiting step and the second limiting step abut against each other. When the locking nut is turned to lock the guide rod, the end of the clamping ring near the handwheel abuts against the locking nut and / or the handwheel.

[0020] The beneficial effects of this utility model are as follows: After the stop block is inserted into the limiting groove, the stop block is fixed to the guide rod by the first fixing member, thereby locking the locking screw located in the limiting groove onto the guide rod. The positioning part abuts against the second limiting end face, and the abutting surface is large, which improves the stability of the locking screw connected to the guide rod. Moreover, the stop block is limited to the limiting groove, making it difficult to loosen and ensuring high stability. Attached Figure Description

[0021] 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 of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0022] Figure 1 This is a front sectional view of an embodiment of the present invention when the locking nut is not tightened and the positioning pin is not inserted into the anti-fall groove;

[0023] Figure 2 for Figure 1 Top sectional view in the current state;

[0024] Figure 3 This is a front sectional view of an embodiment of the present invention when the locking nut is not tightened and the positioning pin is inserted into the anti-fall groove;

[0025] Figure 4 for Figure 3 Top sectional view in the current state;

[0026] Figure 5 This is a side view of the stop block in an embodiment of the present invention;

[0027] Figure 6 This is a front sectional view of the stop block in an embodiment of the present invention;

[0028] Figure 7 This is a side view, top view, and cross-sectional view of the stop block in an embodiment of this utility model;

[0029] Figure 8 This is a partial sectional view of the locking screw in an embodiment of the present invention.

[0030] Figure 9 This is a top view of the locking screw in an embodiment of the present invention;

[0031] Figure 10 for Figure 2 Enlarged view of the structure at point A in the middle;

[0032] Figure 11 for Figure 2 Enlarged view of the structure at point B in the middle;

[0033] Figure 12 for Figure 1 Enlarged view of the structure at point C;

[0034] Figure 13 This is a front sectional view of the locking nut in an embodiment of the present invention when it is tightened;

[0035] In the diagram, 1 is the guide rod; 2 is the locking screw; 21 is the limiting groove; 211 is the first limiting end face; 212 is the second limiting end face; 22 is the anti-fall groove; 3 is the stop block; 31 is the positioning part; 311 is the sliding groove; 32 is the connecting part; 321 is the first hole; 322 is the insertion notch; 4 is the clamping cone sleeve; 41 is the positioning pin; 411 is the positioning plunger; 42 is the positioning hole; 421 is the first center hole; 422 is the second center hole; 423 is the first limiting step; 43 is the second fixing part; 44 is the third screw hole; 5 is the first fixing part; 6 is the locking nut; 61 is the ring groove; 7 is the handwheel; 8 is the clamping ring; 81 is the first ring; 82 is the second ring; 83 is the second limiting step. Detailed Implementation

[0036] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0037] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0038] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0039] like Figures 1 to 13 As shown in the figure, a locking and stable handwheel anti-fall structure according to an embodiment of this utility model includes a guide rod 1, a clamping cone sleeve 4, a locking screw 2, and a locking nut 6. One end of the locking screw 2 is connected to the guide rod 1. When the locking nut 6 is rotated to lock the guide rod 1, it pushes the clamping cone sleeve 4 to move linearly towards the guide rod 1.

[0040] The locking screw 2 is provided with a limiting groove 21 on the outer periphery of its end. The limiting groove 21 has a first limiting end face 211 and a second limiting end face 212 in sequence from the end away from the guide rod 1 to the end close to the guide rod 1. A stop block 3 is inserted in the limiting groove 21. The stop block 3 has a positioning part 31 located between the first limiting end face 211 and the second limiting end face 212 and a connecting part 32 located outside the limiting groove 21 in sequence along its radial direction. The connecting part 32 is connected to the guide rod 1 through the first fixing member 5 and the positioning part 31 abuts against the second limiting end face 212 to lock the locking screw 2 onto the guide rod 1.

[0041] With this setting, after the stop block is inserted into the limiting groove, the stop block is fixed to the guide rod by the first fixing member, thereby locking the locking screw located in the limiting groove onto the guide rod. The positioning part abuts against the second limiting end face, and the abutting surface is large, which improves the stability of the locking screw connected to the guide rod. In addition, the stop block is limited to the limiting groove, making it difficult to loosen and ensuring high stability.

[0042] One end of the connecting part 32 extends to the guide rod 1 and abuts against the end face of the guide rod 1. The connecting part 32 has at least one first hole 321 through it along its axial direction. The guide rod 1 is provided with at least an equal number of second screw holes 11 at the corresponding positions of the first hole 321. The tail end of the first fixing member 5 passes through the first hole 321 and is threadedly connected to the second screw hole 11.

[0043] This configuration further improves the stability of the connection between the connecting part and the end face of the guide rod, as well as the stability of the fit between the stop block and the guide rod, the stop block and the limiting groove, and the locking screw and the guide rod. In this embodiment, the first fixing part is specifically a threaded part, which passes through the first hole and connects to the second screw hole, making it easy to assemble and disassemble. The number of the first hole and the second screw hole is preferably set to at least two and symmetrically distributed about the central axis to improve the stability of the connection.

[0044] Two limiting grooves 21 are provided, and the two limiting grooves 21 are located on both sides of the end of the locking screw 2.

[0045] The connecting part 32 is semi-circular and has an insertion notch 322. During the process of the locking screw 2 being inserted into the stop block 3 from the insertion notch 322, the positioning part 31 is inserted into the limiting groove 21 to form an axial limit on the locking screw 2.

[0046] This setting improves the ease of installing the stop block.

[0047] The two limiting grooves 21 have parallel bottom surfaces and are symmetrically distributed about the central axis. The positioning part 31 is provided with two parts corresponding to the limiting grooves 21 and is adapted to the shape of the limiting grooves 21. The two positioning parts 31 have parallel bottom surfaces and form a sliding groove 311.

[0048] The locking screw 2 is inserted into the stop block 3 along the sliding groove 311, and the bottom surface of the limiting groove 21 is fitted with the positioning part 31 with a clearance to restrict the relative rotation of the stop block 3 and the locking screw 2.

[0049] This design further improves the stability of the locking screw connection to the guide rod.

[0050] The upper end of the locking screw 2 is provided with an axially extending anti-fall groove 22, which is located at the center of the two limiting grooves 21.

[0051] The clamping cone sleeve 4 is provided with a positioning pin 41. When the locking nut 6 is rotated to lock the guide rod 1, one end of the positioning pin 41 is limited to the anti-fall groove 22, and the clamping cone sleeve 4 moves linearly along the anti-fall groove 22 to the guide rod 1.

[0052] With this setup, when in use, the handwheel is straightened according to the position indicator of the fall arrest groove. The positioning pin corresponds to the mapped position of the fall arrest groove and enters the guide groove. Through the positioning engagement of the positioning pin and the positioning groove, the clamping cone sleeve can move linearly along the guide rod of the fall arrest groove.

[0053] The clamping cone sleeve 4 has a positioning hole 42 for inserting the end of the positioning pin 41. The positioning pin 41 is detachably fitted with a positioning plunger 411. When the locking nut 6 is unscrewed, the positioning plunger 411 and the anti-fall groove 22 are mutually limited. The limitation between the positioning plunger 411 and the anti-fall groove 22 is released by rotating the positioning plunger 411.

[0054] It also includes a handwheel 7, which and a locking nut 6 are sequentially sleeved on one end of the clamping cone sleeve 4, and the locking nut 6 and the handwheel 7 are connected and fastened to the clamping cone sleeve 4 by a second fixing member 43.

[0055] The locking nut 6 is provided with an annular groove 61 that allows the locking nut 6 and the clamping cone sleeve 4 to rotate relative to each other. The second fixing member 43 is a set screw. The clamping cone sleeve 4 is provided with a third screw hole 44. The second fixing member 43 is used to fasten the locking nut 6 to the clamping cone sleeve 4. The second fixing member 43 is tightened in the third screw hole 44, and the end of the second fixing member 43 is inserted into the annular groove 61.

[0056] The clamping cone sleeve 4 has a central through hole extending axially. The central through hole has a first central hole portion 421 and a second central hole portion 422 that are coaxially arranged and connected from one end of the guide rod 1 to one end of the handwheel 7. The diameter of the first central hole portion 421 is smaller than the diameter of the second central hole portion 422, so that a first limiting step 423 is formed between them.

[0057] A clamping ring 8, whose central hole is adapted to the size of the locking screw 2, is fitted between the locking screw 2 and the clamping cone sleeve 4. The clamping ring 8 has a first ring 81 and a second ring 82 that are coaxially arranged and connected from one end of the guide rod 1 to one end of the handwheel 7. The outer diameter of the first ring 81 is smaller than the outer diameter of the second ring 82, so that a second limiting step 83 is formed between the two.

[0058] The first limiting step 423 and the second limiting step 83 abut against each other. When the locking nut 6 rotates the guide rod 1 to lock, the end of the abutting ring 8 near the handwheel 7 abuts against the locking nut and / or the handwheel 7.

[0059] With this setting, when the locking nut is tightened by rotating the guide rod, the axial movement of the locking nut relative to the locking screw drives the movement of the clamping ring, which in turn drives the clamping cone sleeve to move linearly along the guide rod, making the movement more stable.

[0060] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A locking stable hand wheel anti-falling structure, comprising a guide rod (1), a clamping cone sleeve (4), a locking screw (2) and a locking nut (6), one end of the locking screw (2) is connected with the guide rod (1), when the locking nut (6) is screwed to lock the guide rod (1), the clamping cone sleeve (4) is pushed to make linear motion towards the guide rod (1), characterized in that: a limiting groove (21) is arranged on the outer periphery of the end of the locking screw (2), the limiting groove (21) has a first limiting end face (211) and a second limiting end face (212) from one end away from the guide rod (1) to one end close to the guide rod (1) in sequence, a stop block (3) is inserted in the limiting groove (21), the stop block (3) has a positioning portion (31) limiting between the first limiting end face (211) and the second limiting end face (212) and a connecting portion (32) outside the limiting groove (21) in sequence along the radial direction thereof, the connecting portion (32) is connected with the guide rod (1) through a first fixing member (5) and the positioning portion (31) abuts against the second limiting end face (212) to lock the locking screw (2) on the guide rod (1). The connecting portion (32) extends to abut against the end face of the guide rod (1) at one end thereof, at least one first hole portion (321) is penetrated through the connecting portion (32) along the axial direction thereof, the guide rod (1) is correspondingly provided with at least an equal number of second screw holes (11) at the position opposite to the first hole portion (321), and the tail end of the first fixing member (5) is threadedly connected with the second screw holes (11) through the first hole portion (321).

2. The locking and stabilizing handwheel anti-falling structure according to claim 1, characterized in that: The limiting groove (21) is provided with two limiting grooves (21) located on both sides of the end of the locking screw (2), 3. The locking and stabilizing handwheel anti-falling structure according to claim 1, characterized in that: The connecting portion (32) is semi-annular and has an insertion gap (322), and the positioning portion (31) is inserted into the limiting groove (21) during the process that the locking screw (2) is inserted into the stop block (3) from the insertion gap (322), so as to form axial limitation of the locking screw (2). The opposite bottom surfaces of the two limiting grooves (21) are parallel and symmetrically distributed about the central axis, the positioning portion (31) is provided with two positioning portions (31) corresponding to the limiting grooves (21) and matched with the shapes of the limiting grooves (21), and the opposite bottom surfaces of the two positioning portions (31) are parallel and form a sliding groove (311), 4. The locking and stabilizing handwheel anti-falling structure according to claim 3, characterized in that: The locking screw (2) is inserted into the stop block (3) along the sliding groove (311), and the gap fit between the bottom surface of the limiting groove (21) and the positioning portion (31) forms the relative rotation limitation of the stop block (3) and the locking screw (2). An axial extending anti-falling groove (22) is formed on the upper end of the locking screw (2), and the anti-falling groove (22) is located at the central position of the two limiting grooves (21), 5. The locking and stabilizing handwheel anti-falling structure according to claim 3, characterized in that: The clamping cone sleeve (4) is provided with a positioning pin (41), one end of the positioning pin (41) is limited in the anti-falling groove (22) when the locking nut (6) is screwed to lock the guide rod (1), and the clamping cone sleeve (4) makes linear motion along the anti-falling groove (22) towards the guide rod (1). ​ 6. The locking and stabilizing handwheel fall arrest structure according to claim 5, characterized in that: The upper part of the clamping cone sleeve (4) is provided with a positioning hole (42) for inserting the end of a positioning pin (41), and the positioning pin (41) is detachably connected with a positioning plunger (411), and when the locking nut (6) is unscrewed, the positioning plunger (411) is limited by the anti-falling groove (22), and the positioning plunger (411) is rotated to release the limitation of the anti-falling groove (22).

7. The locking and stabilizing handwheel fall arrest structure according to claim 1, characterized in that: A hand wheel (7) is further included, the hand wheel (7) and the locking nut (6) are sequentially sleeved on one end of the clamping cone sleeve (4), and the locking nut (6) and the hand wheel (7) are connected and fastened with the clamping cone sleeve (4) through a second fixing part (43).

8. The locking and stabilizing handwheel anti-falling structure according to claim 7, characterized in that: The locking nut (6) is provided with an annular groove (61) allowing relative rotation between the locking nut (6) and the clamping cone sleeve (4), the second fixing part (43) is a tight screw, the clamping cone sleeve (4) is provided with a third screw hole (44), the second fixing part (43) is used for fastening the locking nut (6) on the clamping cone sleeve (4), the second fixing part (43) is screwed in the third screw hole (44), and the second fixing part (43) is inserted into the annular groove (61).

9. The locking and stabilizing handwheel fall arrest structure according to claim 7, characterized in that: The clamping cone sleeve (4) has a center through hole penetrating in the axial direction, the center through hole has a first center hole part (421) and a second center hole part (422) coaxially arranged and connected in sequence from one end of the guide rod (1) to one end of the hand wheel (7), the diameter of the first center hole part (421) is smaller than that of the second center hole part (422), so that a first limiting step (423) is formed between the first center hole part (421) and the second center hole part (422), The locking screw (2) and the clamping cone sleeve (4) are sleeved with a center hole and a locking screw (2) size adapted to the abutting ring part (8), the abutting ring part (8) has a first ring part (81) and a second ring part (82) coaxially arranged and connected in sequence from one end of the guide rod (1) to one end of the hand wheel (7), the outer diameter of the first ring part (81) is smaller than that of the second ring part (82), so that a second limiting step (83) is formed between the first ring part (81) and the second ring part (82), The first limiting step (423) and the second limiting step (83) are abuttingly connected, when the locking nut (6) is rotated towards the guide rod (1) and locked, the end of the abutting ring part (8) close to the hand wheel (7) is abuttingly connected with the locking nut and / or the hand wheel (7).

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