A joint bolt wrench position adjustment structure and a gasoline engine

Abstract

This utility model discloses a joint bolt wrench position adjustment structure and a gasoline engine, including a base, a rotatable wheel on the upper side of the base, at least two limiting grooves around an axis on the lower side of the wheel, the depth of the limiting grooves increasing sequentially in a clockwise or counterclockwise direction; a push rod hole is opened on the base corresponding to the position of the limiting groove, and the push rod hole can be aligned with any limiting groove during the rotation of the wheel; a push rod is provided below the base, the upper end of the push rod extends into the push rod hole and is slidably connected to the base, when the wheel rotates to the point where any limiting groove is aligned with the push rod hole, one end of the push rod can pass through the push rod hole and extend into the limiting groove. The beneficial effects of this solution are: rotating the wheel aligns different limiting grooves with the push rod hole, the different depths of the different limiting grooves change the stroke limit of the push rod, the structure is simple, it provides multiple stroke positions, it is easy to operate, and it is suitable for various occasions that require adjustment of stroke positions.

Description

Technical Field

[0001] This utility model relates to the field of gasoline engine technology, specifically to a joint bolt wrench gear adjustment structure and a gasoline engine. Background Technology

[0002] A gasoline engine is a power device that uses gasoline as fuel to convert internal energy into kinetic energy. It includes a cylinder, crankshaft and connecting rod mechanism, crankcase, ignition system, fuel supply system, intake and exhaust system, lubrication system, cooling system, and starting device. Small gasoline engines, due to their small size and portability, are often used as power sources for tools such as bolt wrenches and chainsaws. For example, prior art document CN201820320852.2 discloses a new type of handheld hair dryer powered by a chainsaw gasoline engine.

[0003] Existing small gasoline engines typically lack gear adjustment capabilities, relying instead on the depth of throttle release to control the engine's output power, thereby controlling the speed and torque of the connected tool. The problem is that relying solely on the user's throttle input to control power output, without gear restrictions, results in inaccurate control, unstable output speed and torque, energy waste, and unsuitability for various working conditions. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is: how to solve the problem that existing small gasoline engines do not have the ability to adjust gears.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a joint bolt wrench stop adjustment structure, including a base, a rotating wheel rotatably disposed on the upper side of the base, at least two limiting grooves are formed on the lower side of the rotating wheel around the axis, the limiting grooves are located on the same circumference, and the center of the circle is located on the axis of the rotating wheel, and the depth of the limiting grooves increases sequentially in the clockwise or counterclockwise direction; A push rod hole is provided on the base at the position corresponding to the limiting groove. During the rotation of the wheel, the push rod hole can be aligned with any limiting groove. A push rod is provided below the base. The upper end of the push rod extends into the push rod hole and is slidably connected to the base. When the wheel rotates to the point where any limiting groove is aligned with the push rod hole, one end of the push rod can pass through the push rod hole and extend into the limiting groove.

[0006] The beneficial effects of this solution are: rotating the wheel aligns different limit grooves with the push rod hole, and the different limit grooves have different depths, thereby changing the stroke limit of the push rod lifting. The structure is simple, provides a variety of stroke gears, is easy to operate, and is suitable for various occasions that require adjustment of stroke gears.

[0007] Preferably, a ring platform is fixedly provided at the lower end of the push rod away from the base, and a first elastic element is sleeved on the push rod for pushing the upper end of the push rod out of the limiting groove. One end of the first elastic element abuts against the ring platform, and the other end abuts against the lower side of the base.

[0008] The advantages of adopting the above preferred solution are: the first elastic element pushes the top rod away from the limit groove, which has a reset function and makes it convenient to rotate the wheel to switch gears at any time.

[0009] Preferably, the upper side of the base is provided with ball grooves corresponding to the number of limiting grooves around the axis of the rotating wheel. The ball grooves are located on the same circumference, and the center of the circle is located on the axis of the rotating wheel. The arc between adjacent ball grooves is consistent with the arc between adjacent limiting grooves. A mounting groove is formed on the lower side of the rotating wheel corresponding to the ball groove. During the rotation of the rotating wheel, the mounting groove can be aligned with any ball groove. A positioning ball and a second elastic element for pushing the positioning ball into the ball groove are provided in the mounting groove. The depth of the ball groove is less than 1 / 2 of the diameter of the positioning ball.

[0010] The advantages of adopting the above preferred solution are: the number of ball grooves corresponds to the number of limiting grooves. When the rotating wheel switches the limiting grooves, the positioning ball also switches in different ball grooves at the same time. When it switches to the correct position, it will make a sound to prevent misjudgment.

[0011] Preferably, the lower side of the rotating wheel is provided with an arc-shaped groove, and the upper side of the base is provided with a limiting post corresponding to the position of the arc-shaped groove, the limiting post being located inside the arc-shaped groove; When the limiting post abuts against one end of the arc-shaped groove, the limiting groove at one end is directly opposite the top rod hole; when the limiting post abuts against the other end of the arc-shaped groove, the limiting groove at the other end is directly opposite the top rod hole.

[0012] The advantages of adopting the above preferred solution are: the arc groove is used to limit the two extreme positions of the clockwise and counterclockwise rotation of the wheel, so as to avoid exceeding the adjustment range.

[0013] Preferably, a reference mark line is provided on the side wall of the base, and a stop mark line corresponding to the number and curvature of the limit groove is provided around the axis on the outer peripheral wall of the wheel, and the stop mark line cooperates with the reference mark line.

[0014] The advantages of adopting the above preferred solution are: when switching gears, the gear position marking line is rotated to align with the reference marking line in sequence, making it easier for the user to identify the current gear.

[0015] Preferably, a rotating column is fixedly provided on the top surface of the base, the rotating wheel is sleeved on the rotating column, and a retaining ring is fixedly provided at the top of the rotating column.

[0016] The advantages of adopting the above preferred solution are: the wheel can rotate better when it is sleeved on the rotating column, the rotation coaxiality is high, it is not easy to deflect, and it is easy to disassemble.

[0017] Preferably, the limiting groove is a conical groove, with its upper inner diameter being smaller than its lower inner diameter.

[0018] The advantages of adopting the above-mentioned preferred solution are: the limiting groove is open, which makes it easier to insert the push rod and less likely to get stuck.

[0019] A gasoline engine includes a gasoline engine body and a handle. The handle is provided with a throttle trigger and the aforementioned connector bolt wrench gear adjustment structure. The end of the push rod away from the base extends into the handle and abuts against the top of the throttle trigger.

[0020] The beneficial effects of this solution are as follows: By installing a joint bolt wrench gear adjustment structure on the gasoline engine handle, the travel of the throttle trigger is limited by the joint bolt wrench gear adjustment structure. The throttle trigger has three gears, which can stabilize the output power of the gasoline engine in different ranges, obtain different speeds and torques, realize the gear adjustment of the gasoline engine, and be suitable for different application scenarios, reduce power waste, and save energy. Attached Figure Description

[0021] Appendix Figure 1 This is a cross-sectional view of the rotating wheel of this utility model; Appendix Figure 2 This is a schematic diagram of the base of this utility model; Appendix Figure 3 This is a schematic diagram of the overall design of this utility model; Appendix Figure 4 This is a schematic diagram of the bottom of the rotating wheel of this utility model; Appendix Figure 5 This is a schematic diagram of the top of the rotating wheel of this utility model; Appendix Figure 6 This is a schematic diagram of the gasoline engine of this utility model; Appendix Figure 7 This is a schematic diagram of the inside of the handle of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Base; 2. Rotary wheel; 3. Limiting groove; 4. Push rod hole; 5. Push rod; 6. Ring platform; 7. First elastic element; 8. Ball groove; 9. Mounting groove; 10. Positioning ball; 11. Second elastic element; 12. Limiting post; 13. Arc groove; 14. Reference mark line; 15. Gear mark line; 16. Rotating post; 17. Retaining ring; 18. Gasoline engine body; 19. Handle; 20. Throttle trigger; 21. Safety switch; 22. Starter pull rope; 23. Fuel tank; 24. Housing. Detailed Implementation

[0023] 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, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] Example 1 like Figures 1 to 5 As shown, a joint bolt wrench stop adjustment structure includes a base 1, a rotating wheel 2 rotatably disposed on the upper side of the base 1, and at least two limiting grooves 3 are formed around the axis on the lower side of the rotating wheel 2. The limiting grooves 3 are located on the same circumference, and the center of the circle is located on the axis of the rotating wheel 2. The depth of the limiting grooves 3 increases sequentially in the clockwise or counterclockwise direction. A push rod hole 4 is provided on the base 1 at the position corresponding to the limiting groove 3. During the rotation of the rotating wheel 2, the push rod hole 4 can be directly aligned with any limiting groove 3. A push rod 5 is provided below the base 1. The upper end of the push rod 5 extends into the push rod hole 4 and is slidably connected to the base 1. When the rotating wheel 2 rotates to the point where any limiting groove 3 is directly aligned with the push rod hole 4, one end of the push rod 5 can pass through the push rod hole 4 and extend into the limiting groove 3.

[0025] In this embodiment, the base 1 and the rotating wheel 2 are coaxially arranged. The rotating wheel 2 can rotate clockwise or counterclockwise on the base 1. In the initial state, the top end of the push rod 5 is flush with or slightly lower than the top surface of the base 1 to avoid hindering the normal rotation of the rotating wheel 2.

[0026] Each limiting groove 3 has a different depth and corresponds to a stroke stop. When a limiting groove 3 is aligned with the push rod hole 4, the user pushes the push rod 5 upward. The top of the push rod 5 extends into the limiting groove 3 and abuts against the bottom of the limiting groove 3. This is the limit position of the upward movement of the push rod 5.

[0027] Then, after the user pulls the push rod 5 down to disengage from the limiting groove 3, the user rotates the wheel 2 to switch to another deeper limiting groove 3 to align with the push rod hole 4. The user then pushes the push rod 5 upward again. During the movement of the push rod 5 as it extends into this limiting groove 3 and abuts against the bottom of the limiting groove 3, the total stroke becomes longer.

[0028] Therefore, this solution rotates the wheel 2 to align the limiting grooves 3 of different depths with the push rod hole 4, thereby changing the stroke limit of the push rod 5. It has a simple structure, provides a variety of stroke gears, is easy to operate, and is suitable for various occasions that require adjustment of stroke gears.

[0029] Based on this embodiment, there are three limiting grooves 3, with a total of three stops, and the arc of two adjacent limiting grooves 3 is spaced 90° apart.

[0030] Example 2 like Figures 1 to 3 As shown, based on Embodiment 1, the lower end of the top rod 5 away from the base 1 is fixedly provided with a ring platform 6, and a first elastic element 7 for pushing the upper end of the top rod 5 out of the limiting groove 3 is sleeved on the top rod 5. One end of the first elastic element 7 abuts against the ring platform 6, and the other end abuts against the lower side of the base 1.

[0031] In this embodiment, the first elastic element 7 is a helical spring. In the initial state, the first elastic element 7 is sleeved on the push rod 5 and is in a released state. When the user pushes the push rod 5 upward, it will compress the first elastic element 7 and store elastic potential energy. When the user removes the force applied to the push rod 5, the first elastic element 7 pushes the push rod 5 away from the limiting groove 3, which has a reset function and makes it convenient to rotate the wheel 2 to switch gears at any time.

[0032] like Figures 1 to 3 As shown, the upper side of the base 1 is provided with ball grooves 8 corresponding to the number of limiting grooves 3 around the axis of the rotating wheel 2. The ball grooves 8 are located on the same circumference, and the center of the circle is located on the axis of the rotating wheel 2. The arc between adjacent ball grooves 8 is consistent with the arc between adjacent limiting grooves 3. A mounting groove 9 is formed on the lower side of the rotating wheel 2 corresponding to the ball groove 8. During the rotation of the rotating wheel 2, the mounting groove 9 can be directly aligned with any ball groove 8. A positioning ball 10 and a second elastic element 11 for pushing the positioning ball 10 into the ball groove 8 are provided in the mounting groove 9. The depth of the ball groove 8 is less than 1 / 2 of the diameter of the positioning ball 10.

[0033] In this embodiment, three limiting grooves 3 and one mounting groove 9 are located on the bottom surface of the rotating wheel 2 and are arranged sequentially at 90° intervals around the axis of the rotating wheel 2. Three ball grooves 8 and one top rod hole 4 are located on the top surface of the base 1 and are arranged sequentially at 90° intervals around the axis of the base 1. The mounting groove 9 is used in conjunction with the three ball grooves 8, and the top rod hole 4 is used in conjunction with the three limiting grooves 3.

[0034] When the rotating wheel 2 switches the limiting groove 3, the positioning ball 10 also switches in different ball grooves 8. When the positioning ball 10 is in the plane position of the top surface of the base 1, it is pushed into the mounting groove 9 by the top surface of the base 1, and the second elastic element 11 is compressed. When the limiting groove 3 is aligned with any top rod hole 4, the mounting groove 9 is also aligned with one of the ball grooves 8, the second elastic element 11 is released, pushing the positioning ball 10 into the ball groove 8 and making a "click" sound to remind the user that the gear has been switched to the correct position.

[0035] like Figure 2 and Figure 4 As shown, the lower side of the rotating wheel 2 is also provided with an arc-shaped groove 13, and the upper side of the base 1 is provided with a limiting post 12 corresponding to the position of the arc-shaped groove 13. The limiting post 12 is located inside the arc-shaped groove 13. When the limiting post 12 abuts against one end of the arc-shaped groove 13, the limiting groove 3 at one end is directly opposite the top rod hole 4. When the limiting post 12 abuts against the other end of the arc-shaped groove 13, the limiting groove 3 at the other end is directly opposite the top rod hole 4.

[0036] In this embodiment, the arc groove 13 is used to limit the two extreme positions of the clockwise and counterclockwise rotation of the rotating wheel 2 to avoid exceeding the adjustment range.

[0037] like Figure 3 and Figure 5 As shown, a reference mark line 14 is provided on the side wall of the base 1, and a gear mark line 15 corresponding to the number and curvature of the limiting groove 3 is provided on the outer peripheral wall of the rotating wheel 2 around the axis. The gear mark line 15 cooperates with the reference mark line 14.

[0038] In this embodiment, the gear position marking line 15 includes a first gear, a second gear, and a third gear. The position and angle spacing correspond to three limiting grooves 3 respectively. When switching gears, the gear position marking line 15 is rotated to align with the reference marking line 14 in sequence, which makes it easier for the user to identify the existing gear.

[0039] like Figure 1 and Figure 2 As shown, a rotating column 16 is fixedly provided on the top surface of the base 1, the rotating wheel 2 is sleeved on the rotating column 16, and a retaining ring 17 is fixedly provided at the top of the rotating column 16.

[0040] In this embodiment, the rotating wheel 2 is rotatably mounted on the rotating column 16. A retaining ring 17 is fixedly installed on the top of the rotating column 16 by screws. The retaining ring 17 prevents the rotating wheel 2 from falling off. The rotating wheel 2 can rotate better, has high coaxiality, is not prone to deflection, and is easy to disassemble.

[0041] like Figure 1 As shown, the limiting groove 3 is a conical groove, with its upper inner diameter being smaller than its lower inner diameter.

[0042] In this embodiment, the limiting groove 3 is open, which makes it easier to insert the top rod 5 and less likely to get stuck.

[0043] Example 3 like Figure 6 and Figure 7 As shown, a gasoline engine includes a gasoline engine body 18 and a handle 19. The handle 19 is provided with a throttle trigger 20 and the aforementioned joint bolt wrench gear adjustment structure is also provided on the handle 19. The end of the push rod 5 away from the base 1 extends into the handle 19 and abuts against the top of the throttle trigger 20.

[0044] A small gasoline engine is a power device that uses gasoline as fuel to convert internal energy into kinetic energy. Due to its small size and portability, it is often used as a power source for tools such as bolt wrenches and chainsaws. The structure of a small gasoline engine includes a gasoline engine body 18 and a handle 19. The gasoline engine body 18 is equipped with components such as an engine system, a starter rope 22, and a fuel tank 23. The handle 19 is equipped with a throttle trigger 20 and a safety switch 21. The throttle trigger 20 is connected to the throttle valve of the engine system.

[0045] In practical use, fuel is stored in the fuel tank 23 to supply the engine system. First, pull the starter rope 22 to start the engine. Then, the user holds the handle 19 with their palm in contact with the safety switch 21 and their fingers in contact with the throttle trigger 20. The user presses the throttle trigger 20 upwards. Since the existing throttle trigger 20 does not have gear restrictions and only relies on the depth of pressing, the deeper the throttle trigger 20 is pressed, the higher the throttle valve opens, resulting in a larger intake volume and higher engine speed and torque. In addition, during use, the palm must always keep the safety switch 21 pressed to ensure the normal operation of the equipment. Once the safety switch 21 is released, the equipment will stop immediately.

[0046] In this embodiment, the gasoline engine and the joint bolt wrench gear adjustment structure are specifically applied to the joint bolt wrench. A small gasoline engine from FUSHWA is used as the power source for the joint bolt wrench. A housing 24 is also fixed on the base 1 of the joint bolt wrench gear adjustment structure. The right outer shell of the gasoline engine handle 19 is replaced with the housing 24 of the joint bolt wrench gear adjustment structure. The base 1 is fixed to the top of the handle 19. The bottom end of the push rod 5 passes through the outer shell of the handle 19 and extends into the handle 19, and abuts against the top of the throttle trigger 20.

[0047] When a user presses the throttle trigger 20 upwards while using a gasoline engine connector bolt wrench, the throttle trigger 20 pushes the push rod 5 upwards. After the top of the push rod 5 extends into the limit groove 3, it reaches its travel limit. At this point, the throttle trigger 20 can no longer be pressed, and the output power of the gasoline engine stabilizes within a certain range, enabling it to output relatively stable speed and torque. This is suitable for tightening bolts with a specific torque requirement.

[0048] To tighten bolts requiring different torques, release the throttle trigger 20. The first elastic element 7 will cause the push rod 5 to move downwards. The push rod 5 will push the throttle trigger 20 to quickly return to its original position. Then, rotate the wheel 2 to switch the other, deeper limit groove 3 to align with the push rod hole 4. This increases the travel of the push rod 5, and the pressing stroke of the throttle trigger 20 will also increase. The output speed and torque will also increase, enabling the tightening of bolts requiring different torques.

[0049] By limiting the travel of the push rod 5, the travel of the throttle trigger 20 can be controlled. The throttle trigger 20 has three gears, which can stabilize the speed of the gasoline engine in different ranges, obtain different speeds and torques, realize the gear adjustment function of the gasoline engine, and be suitable for the torque requirements of different bolts, reduce power waste and save energy.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A joint bolt wrench stop adjustment structure, characterized in that, It includes a base (1), on which a rotating wheel (2) is rotatably mounted. At least two limiting grooves (3) are opened on the lower side of the rotating wheel (2) around the axis. The limiting grooves (3) are located on the same circumference, and the center of the circle is located on the axis of the rotating wheel (2). The depth of the limiting grooves (3) increases sequentially in the clockwise or counterclockwise direction. A push rod hole (4) is provided on the base (1) at the position corresponding to the limiting groove (3). During the rotation of the wheel (2), the push rod hole (4) can be directly aligned with any limiting groove (3). A push rod (5) is provided below the base (1). The upper end of the push rod (5) extends into the push rod hole (4) and is slidably connected to the base (1). When the wheel (2) rotates to the point where any limiting groove (3) is directly aligned with the push rod hole (4), one end of the push rod (5) can pass through the push rod hole (4) and extend into the limiting groove (3).

2. The joint bolt wrench gear adjusting structure according to claim 1, characterized in that, The lower end of the top rod (5) away from the base (1) is fixedly provided with a ring platform (6). A first elastic element (7) for pushing the upper end of the top rod (5) out of the limiting groove (3) is sleeved on the top rod (5). One end of the first elastic element (7) abuts against the ring platform (6), and the other end abuts against the lower side of the base (1).

3. The joint bolt wrench gear adjusting structure according to claim 1, characterized in that, The upper side of the base (1) is provided with ball grooves (8) corresponding to the number of limiting grooves (3) around the axis of the rotating wheel (2). The ball grooves (8) are located on the same circumference, and the center of the circle is located on the axis of the rotating wheel (2). The arc between adjacent ball grooves (8) is consistent with the arc between adjacent limiting grooves (3). An installation groove (9) is provided on the lower side of the rotating wheel (2) corresponding to the ball groove (8). During the rotation of the rotating wheel (2), the installation groove (9) can be directly opposite any ball groove (8). The installation groove (9) is provided with a positioning ball (10) and a second elastic element (11) for pushing the positioning ball (10) into the ball groove (8). The depth of the ball groove (8) is less than 1 / 2 of the diameter of the positioning ball (10).

4. The joint bolt wrench gear adjusting structure according to claim 1, characterized in that, The lower side of the wheel (2) is also provided with an arc groove (13), and the upper side of the base (1) is provided with a limiting post (12) corresponding to the position of the arc groove (13). The limiting post (12) is located inside the arc groove (13). When the limiting post (12) abuts against one end of the arc groove (13), the limiting groove (3) at one end is directly opposite the top rod hole (4). When the limiting post (12) abuts against the other end of the arc groove (13), the limiting groove (3) at the other end is directly opposite the top rod hole (4).

5. The jointed bolt wrench gear adjustment structure according to claim 1, characterized in that, The base (1) has a reference mark line (14) on its side wall, and the wheel (2) has a gear mark line (15) on its outer peripheral wall that corresponds to the number and curvature of the limiting groove (3). The gear mark line (15) cooperates with the reference mark line (14).

6. The joint bolt wrench stop adjustment structure according to claim 1, characterized in that, The base (1) has a rotating column (16) fixedly mounted on its top surface. The rotating wheel (2) is sleeved on the rotating column (16). The top of the rotating column (16) has a retaining ring (17) fixedly mounted on its top.

7. A spanner wrench gear adjustment structure according to any one of claims 1 to 6, characterized in that, The limiting groove (3) is a conical groove, with its upper inner diameter being smaller than its lower inner diameter.

8. A gasoline engine comprising a gasoline engine body (18) and a handle (19) provided with a throttle trigger (20) on the handle (19), characterized by The handle (19) is further provided with the joint bolt wrench gear adjusting structure according to any one of claims 1 to 7, and the top rod (5) is inserted into the handle (19) and abuts against the top of the throttle trigger (20) away from the base (1).

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