Telescopic folding hand wheel

Abstract

The utility model discloses a telescopic folding hand wheel, which relates to the technical field of mechanical parts and comprises a body, a connecting hole is arranged at the axis position of the lower side of the body, the inside of the connecting hole is connected with the outside through a spline, a telescopic rod is arranged on the body in a sliding mode, the telescopic rod can coincide with the body and can slide out, and the two positions of the telescopic rod are limited. A handle is installed on the telescopic rod in a folding mode, and the handle can be attached to the telescopic rod and can also be perpendicular to the telescopic rod. The telescopic rod can be folded to the maximum extent through sliding of the telescopic rod and hinging of the handle, meanwhile, the telescopic rod can be completely unfolded to increase the torque, the portability degree is increased, when the hand wheel is in a folded state, the ball head can clamp the telescopic rod through cooperation with the positioning hole, and the situation that the telescopic rod slides freely when not used, and consequently storage and transportation are inconvenient is prevented; meanwhile, the positioning groove can be used for guiding to enable the ball head to accurately slide into the positioning hole.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical accessories, in particular to a telescopic folding hand wheel. Background Art

[0002] A handwheel is a manually operated rotating device, usually composed of a handwheel body, a handle, a spiral sleeve and other components. It is widely used in mechanical equipment such as machine tools, lifting equipment, and automobiles to control the mechanical equipment through manual rotation. The structure of the handwheel is mainly composed of a handwheel body and a shaft connected to the handle. The handwheel body usually includes two types: disc-shaped and spherical. Among them, disc-shaped handwheels are mostly used for rotation operations on a plane, while spherical handwheels are mostly used for rotation operations in space. There are many ways to classify handwheels. According to national standards and non-national standards, they can be divided into national standard handwheels and non-national standard handwheels. According to raw materials, they can be divided into natural rubber handwheels, plastic handwheels, bakelite handwheels and cast iron handwheels. According to styles, there are mainly small handwheels, corrugated handwheels, small corrugated handwheels, back corrugated handwheels, round rim handwheels, inner corrugated handwheels, double-handled handwheels, cast iron plated handwheels, flat handwheels, double-spoke handwheels, dial handwheels, grinder handwheels, milling machine handwheels, etc. There are handwheels with fixed lever arms and retractable adjustable handwheels on the market. The fixed lever arm handwheel has a large structure and is inconvenient for fine adjustment; the retractable adjustable handwheel has a complex structure, is inconvenient to operate, and is easily damaged. The handle of the handwheel is divided into two categories: fixed handle and foldable handle. The fixed handle occupies a large space, while the foldable handle occupies a small space and is easy to operate.

[0003] A Chinese patent with application publication number CN111831051A discloses a retractable and adjustable folding handwheel, which solves the problem of space occupied by the handwheel handle in the traditional technology. It is mainly composed of three parts: a telescopic handle, a folding handle and a handwheel body. The telescopic handle is installed on the handwheel body, can move along the radial direction of the handwheel body, and can protrude from the outer ring of the handwheel body to adapt to the space required for different operating requirements. At the same time, the folding handle can also be rotated on the handwheel body, further improving the utilization rate of space and the flexibility of operation. This utility model is particularly suitable for various switch devices that need to be rotated. However, the existing technology is not convenient for the folding use of the handwheel, and it is not easy to operate. At the same time, it does not reduce much occupied space when it is retracted when not in use. Utility Model Content

[0004] In view of the above technical problems, the utility model discloses a telescopic folding hand wheel, comprising a body, a slide groove is arranged on the body, a telescopic rod is slidably mounted on the slide groove, and a handle is hinged on the telescopic rod. Through the above technical solution, the sliding of the telescopic rod and the hinge of the handle can be folded to the maximum extent, and at the same time can be fully unfolded to increase the torque, thereby increasing the portability.

[0005] Furthermore, a mounting seat is fixedly mounted on the telescopic rod, and the handle is hinged to the telescopic rod through the mounting seat.

[0006] Furthermore, a fixing screw is fixed in the slide groove, and a long groove is provided on the telescopic rod. When the telescopic rod slides to the outermost end, the fixing screw abuts against the end of the long groove.

[0007] Furthermore, a threaded hole is provided in the slide groove, and a fixing screw is fixed in the slide groove through the threaded hole. Through the above technical solution, the position where the telescopic rod slides out can be limited to ensure that it will not accidentally disengage during use.

[0008] Furthermore, a plunger assembly is installed in the slide groove, and when the telescopic rod is retracted into the body, the telescopic rod abuts against the plunger assembly.

[0009] Furthermore, the plunger assembly comprises a plunger shell, which is fixedly installed in the slide groove, a spring is fixedly installed in the plunger shell, a ball head is fixedly installed on the top of the spring, and the ball head abuts against the telescopic rod.

[0010] Furthermore, a positioning groove is provided on the lower side of the telescopic rod near one end of the plunger assembly, and a positioning hole is connected to the positioning groove. When the telescopic rod is fully retracted, the ball head is stuck in the positioning hole.

[0011] Furthermore, the highest point of the positioning groove is lower than the highest point of the ball head, and the highest point of the positioning hole is higher than the highest point of the positioning groove. Through the above technical solution, when the hand wheel is in the folded state, the ball head can clamp the telescopic rod by cooperating with the positioning hole to prevent the telescopic rod from sliding freely when not in use, causing inconvenience in storage and transportation. At the same time, the positioning groove can serve as a guide to allow the ball head to slide accurately into the positioning hole.

[0012] The beneficial effects of the utility model compared with the prior art are:

[0013] (1) Through the technical solution of the utility model, the sliding of the telescopic rod and the hinge of the handle can be folded to the greatest extent, and at the same time can be fully unfolded to increase the torque, thereby increasing the portability.

[0014] (2) The technical solution of the utility model can limit the sliding position of the telescopic rod to ensure that it will not accidentally fall off during use.

[0015] (3) Through the technical solution of the utility model, when the hand wheel is in a folded state, the ball head can clamp the telescopic rod by cooperating with the positioning hole, thereby preventing the telescopic rod from sliding freely when not in use, causing inconvenience in storage and transportation. At the same time, the positioning groove can serve as a guide to allow the ball head to slide accurately into the positioning hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the unfolded state of an embodiment of the utility model.

[0017] Figure 2 This is a schematic diagram of a folded state of an embodiment of the utility model.

[0018] Figure 3 It is a side view of the folded state of the embodiment of the utility model.

[0019] Figure 4 for Figure 3 Cross-sectional view at BB in the middle.

[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0021] Figure 6 Schematic diagram of the plunger assembly of the utility model embodiment.

[0022] Figure 7 It is a top view of the local structure of an embodiment of the utility model.

[0023] Figure 8 for Figure 7 Enlarged view of CC in the middle.

[0024] Figure numbers: 1-main body; 2-plunger assembly; 3-telescopic rod; 4-fixing screw; 5-handle; 6-mounting seat; 7-long groove; 8-slide groove; 9-bolt; 10-positioning hole; 11-positioning groove; 12-connecting hole; 201-plunger shell; 202-spring; 203-ball head. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model.

[0026] according to Figure 1-Figure 8 A telescopic folding handwheel shown in the figure comprises a main body 1, a connecting hole 12 is provided at the lower axial position of the main body 1, the connecting hole 12 is connected to the outside through a spline, a telescopic rod 3 is slidably mounted on the main body 1, the telescopic rod 3 can overlap with the main body 1, and can also slide out, and has limits at both positions, a handle 5 is foldably mounted on the telescopic rod 3, the handle 5 can fit with the telescopic rod 3, and can also be perpendicular to the telescopic rod 3.

[0027] In this embodiment, a slide groove 8 is provided on the upper side of the body 1. The slide groove 8 is a T-shaped groove. The slide groove 8 passes through the axis of the body 1 and penetrates the upper side of the body 1. The telescopic rod 3 is slidably installed in the slide groove 8. The shape of the lower side of the telescopic rod 3 fits with the slide groove 8. The two ends of the telescopic rod 3 are arc-shaped. When the telescopic rod 3 is completely in the slide groove 8, the curvature of the two ends of the telescopic rod 3 also completely coincides with the outer side of the body 1. A long groove 7 is provided in the middle position of the telescopic rod 3. The two ends of the long groove 7 are arc-shaped. The end of the long groove 7 is provided with a threaded hole, and the threaded hole is matched with a bolt 9. The mounting seat 6 is fixed to the long groove 7 by the bolt 9. A handle 5 is hinged on the mounting seat 6. The handle 5 can fit with the telescopic rod 3 or be perpendicular to the telescopic rod 3. In other embodiments, the handle 5 can be hinged to the telescopic rod 3 in other ways as long as the folding function can be met.

[0028] A threaded hole is provided at the bottom of the slide groove 8, and a fixing screw 4 is fitted in the threaded hole. The fixing screw 4 is located in the long groove 7 and fits with the inside of the long groove 7. When the long groove 7 slides out of the body 1, since the slide groove 8 is a through groove, it may slip during use. The fixing screw 4 is located in the long groove 7 and can limit the telescopic rod 3. When the telescopic rod 3 slides to the outermost side, the fixing screw 4 just coincides with the end of the long groove 7, so that the telescopic rod 3 cannot continue to slide outward.

[0029] A square hole is also provided at the bottom of the slide groove 8, and a plunger assembly 2 is inserted into the square hole. The plunger assembly 2 is also used to limit the sliding of the telescopic rod 3. When the telescopic rod 3 and the body 1 slide to the overlapping position, the plunger assembly 2 can clamp the telescopic rod 3. In this embodiment, the plunger assembly 2 includes a plunger shell 201. The size of the plunger shell 201 is slightly larger than the square hole in the slide groove 8, forming an interference fit to ensure the stability of the plunger assembly 2 in the square hole. The plunger shell 201 is a hollow structure. A spring 202 is fixedly installed inside the plunger shell 201. A ball head 203 is fixedly installed on the upper end of the spring 202. The opening at the upper end of the plunger shell 201 is closed inwardly, and the size of the closing is slightly smaller than the diameter of the ball head 203, ensuring The upper side of the ball head 203 is higher than the upper end of the plunger shell 201, but the ball head 203 will not be completely pushed out of the plunger shell 201 by the spring 202. A positioning groove 11 and a positioning hole 10 are provided at the lower part of the telescopic rod 3. The top of the positioning groove 11 is lower than the top of the ball head 203, and the top of the positioning hole 10 is higher than the top of the positioning groove 11. When the telescopic rod 3 slides to contact the ball head 203, the positioning groove 11 will contact the side of the ball head 203 to press the ball head 203 downward until the ball head 203 enters the positioning hole 10. The ball head 203 is stuck in the positioning hole 10, and the positioning hole 10 also has an arc surface. When the telescopic rod 3 is forced to slide out, the ball head 203 can automatically disengage from the positioning hole 10.

[0030] Working principle: insert the main body 1 into the desired position through the connecting hole 12, turn the handle 5, turn the handle 5 to deal with the telescopic rod 3, pull the handle 5 to drive the telescopic rod 3 to slide in the slide groove 8, slide to the end of the long groove 7 and contact the fixing screw 4, then it is fully unfolded and can be rotated for normal use. After use, push the telescopic rod 3 back, the positioning groove 11 contacts the ball head 203, the ball head 203 is pressed down, and the ball head 203 slides in the positioning groove 11 to the positioning hole 10 and is stuck. At this time, the telescopic rod 3 returns to the position overlapping with the main body 1, and then rotate the handle 5 to make it fit with the telescopic rod 3.

[0031] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model.

Claims

1. A telescopic folding hand wheel, comprising a body (1), characterized in that: The body (1) is provided with a slide groove (8), a telescopic rod (3) is slidably mounted on the slide groove (8), and a handle (5) is hinged on the telescopic rod (3); The telescopic rod (3) is fixedly provided with a mounting seat (6), and the handle (5) is hinged to the telescopic rod (3) via the mounting seat (6); A fixing screw (4) is fixedly installed in the sliding groove (8), and a long groove (7) is provided on the telescopic rod (3). When the telescopic rod (3) slides to the outermost end, the fixing screw (4) abuts against the end of the long groove (7).

2. A telescopic folding hand wheel according to claim 1, characterized in that: A threaded hole is provided in the slide groove (8), and the fixing screw (4) is fixed in the slide groove (8) through the threaded hole.

3. A telescopic folding hand wheel according to claim 2, characterized in that: The slide groove (8) is provided with a plunger assembly (2). When the telescopic rod (3) is retracted into the body (1), the telescopic rod (3) abuts against the plunger assembly (2).

4. A telescopic folding hand wheel according to claim 3, characterized in that: The plunger assembly (2) comprises a plunger shell (201), the plunger shell (201) is fixedly installed in the slide groove (8), a spring (202) is fixedly installed in the plunger shell (201), a ball head (203) is fixedly installed on the top of the spring (202), and the ball head (203) abuts against the telescopic rod (3).

5. A telescopic folding hand wheel according to claim 4, characterized in that: A positioning groove (11) is provided on the lower side of the telescopic rod (3) near one end of the plunger assembly (2), and a positioning hole (10) is connected to the positioning groove (11). When the telescopic rod (3) is fully retracted, the ball head (203) is stuck in the positioning hole (10).

6. A telescopic folding hand wheel according to claim 5, characterized in that: The highest point of the positioning groove (11) is lower than the highest point of the ball head (203), and the highest point of the positioning hole (10) is higher than the highest point of the positioning groove (11).

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