A length-adjustable hand crank

Abstract

The present invention provides a length-adjustable hand crank, comprising a thin tube, a middle tube, and a thick tube, wherein a first adjustment mechanism is installed between the thin tube and the middle tube, the first adjustment mechanism comprises a locking sleeve and an internally threaded locking rotating member outside the locking sleeve, a second adjustment mechanism is arranged between the middle tube and the thick tube, the lower end of the thin tube inside the middle tube is connected to a thin tube hexagonal fixing member, the lower end of the middle tube inside the thick tube is provided with a middle tube hexagonal fixing member, and a rotating mechanism is arranged on the outer side of the lower part of the thick tube. The length-adjustable hand crank described in the present invention is suitable for different working scenarios, and users can adjust the hand crank according to their own height or product installation height, thereby improving the comfort of the operator.

Description

Technical Field

[0001] The invention relates to the technical field of hand cranks, and in particular to a hand crank with adjustable length. Background Art

[0002] Most hand cranks are divided into two structures: foldable and integral. The foldable one consists of a long rod, two short rods, and two rotating shafts. It can be pulled into a straight rod and folded into a hand crank. The integral one consists of a long rod and two rotating shafts to form a hand crank.

[0003] The current market is full of standard sizes, 1m, 1.2m, 1.5m, 1.8m, 2m, 2.2m. Often, end customers order inappropriate joysticks because they do not understand the product. Also, because users are of different heights, the comfort level of the same joystick varies greatly. To solve the above problems, we have proposed a hand crank with adjustable length. Summary of the invention

[0004] The purpose of the present invention is to provide a hand crank with adjustable length, which is suitable for different working scenes. The user can adjust the hand crank according to his / her own height, thereby improving the comfort of the operator.

[0005] The embodiment of the present invention is achieved as follows:

[0006] An embodiment of the present invention provides a length-adjustable hand crank, comprising a thin tube, a middle tube, and a thick tube, wherein a first adjustment mechanism is installed between the thin tube and the middle tube, the first adjustment mechanism comprising a locking sleeve and an internally threaded locking rotating part outside the locking sleeve, a second adjustment mechanism is arranged between the middle tube and the thick tube, the lower end of the thin tube inside the middle tube is connected to a thin tube hexagonal fixing part, the lower end of the middle tube inside the thick tube is arranged with a middle tube hexagonal fixing part, and a rotating mechanism is arranged on the outer side of the lower part of the thick tube.

[0007] Optionally, the rotating mechanism includes a first thick tube rotating shaft and a second thick tube rotating shaft, the first thick tube rotating shaft and the second thick tube rotating shaft are sleeved on the outside of the thick tube, the inner surfaces of the first thick tube rotating shaft and the second thick tube rotating shaft are movably connected to the outer surface of the thick tube, and the first thick tube rotating handle and the second thick tube rotating handle are fixedly installed on the outside of the first thick tube rotating shaft and the second thick tube rotating shaft, and the first thick tube rotating handle and the second thick tube rotating handle are symmetrical about the center line axis of the thick tube.

[0008] By adopting the above technical solution, the first thick tube rotating handle and the second thick tube rotating handle can be rotated on the outside of the thick tube through the first thick tube rotating axis and the second thick tube rotating axis, which is convenient for the rotation of the first thick tube rotating handle and the second thick tube rotating handle during operation.

[0009] Optionally, the locking sleeve is sleeved on the outside of the thin tube, the upper end of the locking sleeve is round and the lower end is dodecagonal, and the shape of the lower end of the locking sleeve is adapted to the shape of the inner wall of the middle tube, the lower end of the locking sleeve is connected to the inner wall of the middle tube, and an opening is provided at the front end of the locking sleeve. The outer surfaces of the middle tube and the upper part of the thick tube are both provided with external threads, and the internally threaded locking rotating part is sleeved on the outside of the locking sleeve and the middle tube, and the inner surface of the lower part of the internally threaded locking rotating part is threadedly engaged with the outer surface of the thick tube, and the internal cross-section of the internally threaded locking rotating part is trapezoidal.

[0010] By adopting the above technical scheme, the locking sleeve is put on the outside of the thin tube and inserted into the inside of the middle tube, the internal thread locking rotating piece is put on the outside of the locking sleeve and the middle tube, and the bottom of the locking sleeve is screwed on the upper end of the middle tube to connect the thin tube and the middle tube. The height between the thin tube and the middle tube can be adjusted by loosening the internal thread locking rotating piece, and the height adjustment between the thin tube and the middle tube is relatively convenient.

[0011] Optionally, the lower end of the capillary tube is fixedly connected to the upper end of the middle tube via a first adjustment mechanism, a hand crank hook is provided at the upper end of the capillary tube, and the hand crank hook and the capillary tube are fixed via a pin.

[0012] By adopting the above technical solution, external equipment can be connected through the hand crank hook.

[0013] Optionally, the structure of the second adjusting mechanism is the same as that of the first adjusting mechanism, and the lower end of the middle tube is fixedly connected to the upper end of the thick tube through the second adjusting mechanism.

[0014] By adopting the above technical solution, the height between the middle tube and the thick tube can be adjusted through the second adjusting mechanism.

[0015] Optionally, the internal cross-sections of the middle tube and the thick tube are both twelve-sided flower-shaped, the upper outer surface of the thin tube hexagonal fixing piece is fixedly connected to the lower outer surface of the thin tube, and the upper outer surface of the middle tube hexagonal fixing piece is fixedly connected to the lower outer surface of the middle tube, and the outer surface of the thin tube hexagonal fixing piece is movably connected to the inner surface of the middle tube.

[0016] By adopting the above technical scheme, the bottom of the thin tube can be locked by the thin tube hexagonal fixing piece to prevent the thin tube from rotating independently inside the middle tube, and the bottom of the middle tube can be locked by the middle tube hexagonal fixing piece to prevent the middle tube from rotating independently inside the thick tube. The fixation is relatively firm and the transmission effect is better.

[0017] Optionally, the thin tube, the middle tube and the thick tube are all made of aluminum material, and the outer surface of the hexagonal fixing of the middle tube is movably connected to the inner surface of the thick tube.

[0018] The beneficial effects of the embodiments of the present invention include: the embodiments of the present invention provide a hand crank with adjustable length, the locking sleeve is sleeved on the outside of the thin tube and inserted into the inside of the middle tube, the internal thread locking rotating piece is sleeved on the outside of the locking sleeve and the middle tube, the bottom of the locking sleeve is screwed on the upper end of the middle tube, and the locking sleeve can be locked on the outside of the thin tube due to the inclination of the inner surface of the internal thread locking rotating piece, thereby connecting the thin tube and the middle tube, and the height between the thin tube and the middle tube can be adjusted by loosening the internal thread locking rotating piece, and the locking sleeve is circular on the upper side and twelve-angled flower-shaped on the lower side, and the lower side of the locking sleeve is connected to the flower-shaped inner wall of the thick tube, so that the locking sleeve will not rotate together with the internal thread locking rotating piece, causing the tube to get stuck when extending and retracting and the phenomenon that the internal thread locking rotating piece cannot be rotated when the internal thread locking rotating piece is rotated, and the height adjustment between the thin tube and the middle tube It is relatively convenient. The structure of the second adjusting mechanism is the same as that of the first adjusting mechanism. The height between the middle tube and the thick tube can be adjusted by the second adjusting mechanism. The shape of the outer surface of the thin tube hexagonal fixing piece is matched with the shape of the inner surface of the middle tube, and the shape of the outer surface of the middle tube hexagonal fixing piece is matched with the shape of the inner surface of the thick tube. The bottom of the thin tube can be locked by the thin tube hexagonal fixing piece to prevent the thin tube from rotating independently inside the middle tube, and the bottom of the middle tube can be locked by the middle tube hexagonal fixing piece to prevent the middle tube from rotating independently inside the thick tube. The fixation is relatively firm and the transmission effect is better. It is suitable for different work scenes, and the user can adjust the hand crank according to his or her own height or the installation height of the product to improve the operator's comfort. The effect of use is better than that of the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 The overall structure of a length-adjustable hand crank of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 2 The overall structure of a length-adjustable hand crank of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 3 It is an exploded schematic diagram of a first adjustment mechanism of a length-adjustable hand crank of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of a capillary tube and a capillary tube hexagonal fixing member of a hand crank with adjustable length according to the present invention;

[0024] Figure 5The present invention is a schematic cross-sectional view of the middle tube and thin tube hexagonal fixing parts of a hand-electric integrated crank.

[0025] Icons: 1. Hand crank hook; 2. Thin tube; 3. Middle tube; 4. First adjustment mechanism; 41. Locking sleeve; 42. Internal thread locking rotating part; 5. Thick tube; 6. Second adjustment mechanism; 7. Hexagonal fixing part for thin tube; 8. Hexagonal fixing part for middle tube; 9. Rotating mechanism; 91. Rotating axis of first thick tube; 92. Rotating axis of second thick tube; 93. Rotating handle of first thick tube; 94. Rotating handle of second thick tube. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The embodiment of the present invention provides a hand crank with adjustable length, such as Figure 1 As shown, it includes a thin tube 2, a middle tube 3, and a thick tube 5. A first adjusting mechanism 4 is installed between the thin tube 2 and the middle tube 3. The first adjusting mechanism 4 includes a locking sleeve 41 and an internal threaded locking rotating member 42 outside the locking sleeve 41. A second adjusting mechanism 6 is arranged between the middle tube 3 and the thick tube 5. The lower end of the thin tube 2 inside the middle tube 3 is connected with a thin tube hexagonal fixing member 7, the lower end of the middle tube 3 inside the thick tube 5 is provided with a middle tube hexagonal fixing member 8, and a rotating mechanism 9 is arranged on the outer side of the lower part of the thick tube 5.

[0031] The lower end of the capillary tube 2 is fixedly connected to the upper end of the middle tube 3 via a first adjusting mechanism 4. A hand crank hook 1 is provided at the upper end of the capillary tube 2. The hand crank hook 1 and the capillary tube 2 are fixed via a pin.

[0032] The structure of the second adjusting mechanism 6 is the same as that of the first adjusting mechanism 4 , and the lower end of the middle tube 3 is fixedly connected to the upper end of the thick tube 5 through the second adjusting mechanism 6 .

[0033] like Figure 1 As shown, the thin tube 2 is fixed to the upper end of the middle tube 3 through the first adjusting mechanism 4, and the middle tube 3 is fixed to the upper end of the thick tube 5 through the second adjusting mechanism 6, connected to the external equipment through the hand crank hook 1, and the hand crank hook 1 is rotated through the rotating mechanism 9 for operation.

[0034] Optional, such as Figure 2 As shown, the rotating mechanism 9 includes a first thick tube rotating shaft 91 and a second thick tube rotating shaft 92. The first thick tube rotating shaft 91 and the second thick tube rotating shaft 92 are sleeved on the outside of the thick tube 5. The inner surfaces of the first thick tube rotating shaft 91 and the second thick tube rotating shaft 92 are movably connected to the outer surface of the thick tube 5. The first thick tube rotating handle 93 and the second thick tube rotating handle 94 are fixedly installed on the outside of the first thick tube rotating shaft 91 and the second thick tube rotating shaft 92. The first thick tube rotating handle 93 and the second thick tube rotating handle 94 are symmetrical about the center line axis of the thick tube 5.

[0035] like Figure 2 As shown, the first thick tube rotating shaft 91 and the second thick tube rotating shaft 92 can make the first thick tube rotating handle 93 and the second thick tube rotating handle 94 rotate on the outside of the thick tube 5, which is convenient for the rotation of the first thick tube rotating handle 93 and the second thick tube rotating handle 94 during operation.

[0036] Optional, such as Figure 3As shown, the locking sleeve 41 is sleeved on the outside of the thin tube 2, the upper end of the locking sleeve 41 is round and the lower end is dodecagonal, and the shape of the lower end of the locking sleeve 41 is adapted to the shape of the inner wall of the middle tube 3, the lower end of the locking sleeve 41 is connected to the inner wall of the middle tube 3, and the front end of the locking sleeve 41 is provided with an opening, and the upper outer surfaces of the middle tube 3 and the thick tube 5 are both provided with external threads, and the internal thread locking rotating member 42 is sleeved on the outer sides of the locking sleeve 41 and the middle tube 3, and the inner surface of the lower part of the internal thread locking rotating member 42 is engaged with the outer surface of the thick tube 5 through a thread, and the internal section of the internal thread locking rotating member 42 is a trapezoid.

[0037] like Figure 3 As shown, the locking sleeve 41 is sleeved on the outside of the thin tube 2 and inserted into the middle tube 3, and the internal thread locking rotating member 42 is sleeved on the outside of the locking sleeve 41 and the middle tube 3, so that the bottom of the locking sleeve 41 is screwed on the upper end of the middle tube 3. Since the inner surface of the internal thread locking rotating member 42 is inclined, the locking sleeve 41 can be locked on the outside of the thin tube 2, thereby connecting the thin tube 2 and the middle tube 3. The height between the thin tube 2 and the middle tube 3 can be adjusted by loosening the internal thread locking rotating member 42. The locking sleeve 41 is circular on the upper side and twelve-angled flower-shaped on the lower side. The lower side of the locking sleeve 41 is connected to the flower-shaped inner wall of the thick tube 5, so that the locking sleeve 41 will not rotate together with the internal thread locking rotating member 42, causing the tube to get stuck during extension and retraction and the internal thread locking rotating member 42 to be unable to rotate. The height adjustment between the thin tube 2 and the middle tube 3 is relatively convenient.

[0038] Optional, such as Figure 4 , 5 As shown, the internal cross-sections of the middle tube 3 and the thick tube 5 are both dodecagonal flower-shaped, the upper outer surface of the thin tube hexagonal fixing piece 7 is fixedly connected to the lower outer surface of the thin tube 2, and the upper outer surface of the middle tube hexagonal fixing piece 8 is fixedly connected to the lower outer surface of the middle tube 3, and the outer surface of the thin tube hexagonal fixing piece 7 is movably connected to the inner surface of the middle tube 3.

[0039] The thin tube 2 , the middle tube 3 , and the thick tube 5 are all made of aluminum material, and the outer surface of the middle tube hexagonal fixing piece 8 is movably connected to the inner surface of the thick tube 5 .

[0040] like Figure 4 , 5 As shown, the bottom of the thin tube 2 can be locked by the thin tube hexagonal fixing piece 7 to prevent the thin tube 2 from rotating independently inside the middle tube 3, and the bottom of the middle tube 3 can be locked by the middle tube hexagonal fixing piece 8 to prevent the middle tube 3 from rotating independently inside the thick tube 5. The fixation is relatively firm and the transmission effect is better.

[0041] It should be noted that the present invention is a hand crank with adjustable length. The user puts the locking sleeve 41 on the outside of the thin tube 2 and inserts it into the middle tube 3, and puts the internal thread locking rotating member 42 on the outside of the locking sleeve 41 and the middle tube 3, so that the bottom of the locking sleeve 41 is screwed on the upper end of the middle tube 3. Since the inner surface of the internal thread locking rotating member 42 is inclined, the locking sleeve 41 can be locked on the outside of the thin tube 2, thereby connecting the thin tube 2 and the middle tube 3. The height between the thin tube 2 and the middle tube 3 is adjusted by loosening the internal thread locking rotating member 42, and the height between the middle tube 3 and the thick tube 5 is adjusted by the second adjustment mechanism 6. The bottom of the thin tube 2 is locked by the thin tube hexagonal fixing member 7 to prevent the thin tube 2 from rotating independently inside the middle tube 3, and the bottom of the middle tube 3 is locked by the middle tube hexagonal fixing member 8 to prevent the middle tube 3 from rotating independently inside the thick tube 5. The hand crank hook 1 is connected to external equipment, and the hand crank hook 1 is rotated by the rotating mechanism 9 to work.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hand crank with adjustable length, comprising a thin tube (2), a middle tube (3), and a thick tube (5), characterized in that: A first adjustment mechanism (4) is installed between the thin tube (2) and the middle tube (3), the first adjustment mechanism (4) comprising a locking sleeve (41) and an internally threaded locking rotating member (42) outside the locking sleeve (41); a second adjustment mechanism (6) is arranged between the middle tube (3) and the thick tube (5); the lower end of the thin tube (2) inside the middle tube (3) is connected to a thin tube hexagonal fixing member (7); the lower end of the middle tube (3) inside the thick tube (5) is provided with a middle tube hexagonal fixing member (8); and a rotating mechanism (9) is arranged on the outer side of the lower part of the thick tube (5); The rotating mechanism (9) comprises a first thick tube rotating shaft (91) and a second thick tube rotating shaft (92), wherein the first thick tube rotating shaft (91) and the second thick tube rotating shaft (92) are sleeved on the outside of the thick tube (5), the inner surfaces of the first thick tube rotating shaft (91) and the second thick tube rotating shaft (92) are movably connected to the outer surface of the thick tube (5), and the outer sides of the first thick tube rotating shaft (91) and the second thick tube rotating shaft (92) are fixedly mounted with a first thick tube rotating handle (93) and a second thick tube rotating handle (94), and the first thick tube rotating handle (93) and the second thick tube rotating handle (94) are symmetrical about the center line of the thick tube (5); The locking sleeve (41) is sleeved on the outside of the thin tube (2); the upper end of the locking sleeve (41) is round and the lower end is twelve-pointed flower-shaped, and the shape of the lower end of the locking sleeve (41) is adapted to the shape of the inner wall of the middle tube (3); the lower end of the locking sleeve (41) is connected to the inner wall of the middle tube (3); the front end of the locking sleeve (41) is provided with an opening; the upper outer surfaces of the middle tube (3) and the thick tube (5) are both provided with external threads; the internal thread locking rotating member (42) is sleeved on the outer sides of the locking sleeve (41) and the middle tube (3), and the inner surface of the lower part of the internal thread locking rotating member (42) is engaged with the outer surface of the middle tube (3) through threads; the internal section of the internal thread locking rotating member (42) is trapezoidal; The internal cross-sections of the middle tube (3) and the thick tube (5) are both twelve-sided flower-shaped, the upper outer surface of the thin tube hexagonal fixing piece (7) is fixedly connected to the lower outer surface of the thin tube (2), and the upper outer surface of the middle tube hexagonal fixing piece (8) is fixedly connected to the lower outer surface of the middle tube (3), and the outer surface of the thin tube hexagonal fixing piece (7) is movably connected to the inner surface of the middle tube (3).

2. A length-adjustable hand crank according to claim 1, characterized in that: The lower end of the capillary tube (2) is fixedly connected to the upper end of the middle tube (3) via a first adjustment mechanism (4); a hand crank hook (1) is provided at the upper end of the capillary tube (2); and the hand crank hook (1) and the capillary tube (2) are fixed via a pin.

3. The length-adjustable hand crank according to claim 1, characterized in that: The structure of the second adjustment mechanism (6) is the same as that of the first adjustment mechanism (4), and the lower end of the middle tube (3) is fixedly connected to the upper end of the thick tube (5) via the second adjustment mechanism (6).

4. The length-adjustable hand crank according to claim 1, characterized in that: The thin tube (2), the middle tube (3) and the thick tube (5) are all made of aluminum material, and the outer surface of the middle tube hexagonal fixing piece (8) is movably connected to the inner surface of the thick tube (5).

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