Tool rod

Abstract

A tool rod, which belongs to the technical field of hand tools. The tool rod comprises a hollow cylinder (14), wherein one end of the hollow cylinder can be connected to a connecting sleeve of a tool working member; a filling rod (15) is provided in the hollow cylinder, and the filling rod can be inserted into the hollow cylinder; and after the filling rod is inserted into the hollow cylinder, the filling rod and the hollow cylinder are fixed to form a solid rod (1). The filling rod occupies the space inside the hollow cylinder, and the hardness and structural characteristics of the filling rod exert a reaction force on the interior of the hollow cylinder, thereby making it possible to resist the bending of the hollow cylinder caused by an external force. Moreover, when the hollow cylinder is subjected to an external force which attempts to bend the hollow cylinder, the tensile and compressive effects that would originally be generated on the material of the hollow cylinder can be absorbed and dispersed to a certain extent due to the filling rod inside the hollow cylinder, and the stress borne by the hollow cylinder is reduced, thereby improving the bending resistance and strength of the solid rod.

Description

A tool rod Technical Field

[0001] This invention belongs to the field of manual tool technology, and particularly relates to a tool lever. Background Technology

[0002] Currently, everyday tools can be divided into three parts: tool handles, tool connectors, and tool working parts. Tool handles are commonly used for manual gripping, and common tool handles include the handles of tools such as shovel handles and pickaxe handles. Tool connectors are commonly used to connect tool handles and tool working parts. Tool working parts are commonly used to work on the workpiece, and common work scenarios include agricultural operations, construction, gardening, cleaning, and wilderness survival. Common workpieces include soil, gravel, and coal. Common tool working parts include shovels, pickaxes, and rakes.

[0003] Most existing tool rods are hollow iron rods or solid wooden rods. Since hollow iron rods and solid wooden rods have poor strength, they will deform and break during daily use, affecting the normal use of the tools. Furthermore, when hollow iron rods and solid wooden rods break, they may pose safety hazards.

[0004] Therefore, there is an urgent need to design a tool rod to solve the problems mentioned above. Technical issues

[0005] The purpose of this invention is to provide a tool rod with the advantages of high strength and good bending resistance, thus solving the problems mentioned in the background art. Technical solutions

[0006] To achieve the above objectives, the specific technical solution of a tool rod according to the present invention is as follows:

[0007] A tool rod includes a hollow cylinder, one end of which can be connected to the connecting sleeve of a tool working part. A filling rod is provided inside the hollow cylinder, which can be inserted into the hollow cylinder. After the filling rod is inserted into the hollow cylinder, the filling rod is fixed to the hollow cylinder to form a solid rod.

[0008] Furthermore, there is a clearance fit between the filling rod and the hollow cylinder.

[0009] Furthermore, the filling rod is bonded and fixed to the hollow cylinder with glue.

[0010] Furthermore, there is an interference fit between the filling rod and the hollow cylinder.

[0011] Furthermore, the solid rod includes a mating section, a connecting section, and a snap-fit ​​section. The mating section can be connected to the connecting sleeve of the tool. The end of the mating section away from the tool is fixedly connected to the connecting section, and the end of the connecting section away from the mating section is fixedly connected to the snap-fit ​​section.

[0012] Furthermore, the mating section is frustum-shaped, and the large-diameter end face of the mating section is fixedly connected to the connecting section. After the filling rod is inserted into the hollow cylinder, the mating section of the filling rod is engaged with the mating section of the hollow cylinder.

[0013] Furthermore, the snap-fit ​​section is frustum-shaped, and the small-diameter end face of the snap-fit ​​section is fixedly connected to the connecting section. After the filling rod is inserted into the hollow cylinder, the mating section of the snap-fit ​​section snaps into the snap-fit ​​section of the hollow cylinder.

[0014] Furthermore, the length of the hollow cylinder locking section is longer than the length of the filling rod locking section, so that a cavity is formed between the hollow cylinder and the filling rod after the filling rod is inserted into the hollow cylinder.

[0015] Furthermore, the mating section of the hollow cylinder has an outer octagonal cross section.

[0016] Furthermore, it also includes a handheld lever, which is detachably connected to the end of the solid lever furthest from the tool's working part.

[0017] Furthermore, the handheld rod includes a handheld part and a plug-in part, which are fixedly connected. The diameter of the handheld part is larger than the diameter of the plug-in part. A limiting surface is provided at the connection between the handheld part and the plug-in part. When the handheld rod is connected to the solid rod, the plug-in part is inserted into the cavity on the hollow rod, and the limiting surface is in contact with the end face of the hollow cylinder.

[0018] Furthermore, threaded grooves are provided on the plug and the cavity. When the hand handle is connected to the solid rod, the threaded groove on the plug and the threaded groove on the cavity are screwed together.

[0019] Furthermore, a mating rod is fixedly connected to the end of the insertion part away from the handheld part, and a groove is provided at the end of the filling rod facing the cavity. When the handheld rod is connected to the solid rod, the mating rod is inserted into the groove.

[0020] Furthermore, threaded grooves are provided on the mating rod and the groove. When the hand-held rod is connected to the solid rod, the threaded groove on the mating rod is screwed into the threaded groove on the groove.

[0021] Furthermore, a connecting sleeve is fitted onto the hollow cylinder. The connecting sleeve can rotate relative to the hand handle. A limit sleeve is fixedly connected to the hand handle to limit the axial sliding path of the connecting sleeve. A threaded groove is provided on the connecting sleeve, and the connecting sleeve is screwed to the connecting sleeve of the tool working part through the threaded groove on the connecting sleeve.

[0022] Furthermore, the limiting sleeve has a through hole, through which the pin is inserted and inserted into the filling rod. Beneficial effects

[0023] The present invention has the following advantages: First, the filling rod occupies the space inside the hollow cylinder. The hardness and structural characteristics of the filling rod exert a reaction force on the inside of the hollow cylinder, thereby resisting the bending caused by external forces on the hollow cylinder. Moreover, when the hollow cylinder is subjected to an external force attempting to bend it, the tensile and compressive forces that would normally occur on the hollow cylinder material are absorbed and dispersed to a certain extent due to the filling rod inside the hollow cylinder, reducing the stress borne by the hollow cylinder itself, thereby improving the bending resistance and strength of the solid rod. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the overall structure of the tool rod of the present invention;

[0025] Figure 2 is a schematic diagram of the hollow cylinder and filling rod of the present invention;

[0026] Figure 3 is a schematic diagram of the clearance fit between the hollow cylinder and the filling rod of the present invention;

[0027] Figure 4 is a schematic diagram of the interference fit between the hollow cylinder and the filling rod of the present invention.

[0028] Figure 5 is a schematic diagram of the solid rod of the present invention;

[0029] Figure 6 is a schematic diagram of the handheld handle of the present invention;

[0030] Figure 7 is a schematic diagram of the cavity, groove and mating rod of the present invention;

[0031] Figure 8 is an exploded structural diagram of the connecting sleeve and the limiting sleeve of the present invention;

[0032] The markings in the diagram are as follows: 1. Solid rod; 11. Mating section; 12. Connecting section; 13. Snap-fit ​​section; 14. Hollow cylinder; 15. Filling rod; 16. Cavity; 17. Groove; 2. Hand handle; 21. Hand handle; 22. Insertion part; 23. Mating rod; 24. Limiting surface; 3. Connecting sleeve; 31. Limiting sleeve. Best Mode for Carrying Out the Invention

[0033] The tool rod includes a hollow cylinder 14, one end of which can be connected to the connecting sleeve of the tool working part. A filling rod 15 is provided inside the hollow cylinder 14. The filling rod 15 can be inserted into the hollow cylinder 14 to fix the filling rod 15 to the hollow cylinder 14, thereby forming a solid rod 1. By inserting the filling rod 15 into the hollow cylinder 14, the filling rod 15 occupies the internal space of the hollow cylinder 14. The hardness and structural characteristics of the filling rod 15 exert a reaction force on the interior of the hollow cylinder 14, thereby resisting the bending caused by external forces on the hollow cylinder 14. When the hollow cylinder 14 is subjected to an external force attempting to bend it, the tensile and compressive forces that would normally occur on the material of the hollow cylinder 14 are absorbed and dispersed to a certain extent due to the filling rod 15 inside the hollow cylinder 14, reducing the stress borne by the hollow cylinder 14 itself, thereby improving the bending resistance and strength of the solid rod 1.

[0034] Regarding the material of the filler rod 15, wood is preferred. Firstly, the strength-to-density ratio of wood is generally higher than that of ordinary filler materials. Under the same weight, wood can provide higher strength, and wood is also lighter. This ensures both the strength and weight of the tool rod, making it easy to use in daily life and highly practical. At the same time, wood is easy to process and can be made into various shapes with simple tools, and the energy consumption during processing is low. Moreover, wood does not become brittle like metal when broken under overload, increasing the safety of use. In other embodiments of the present invention, the material of the filler rod 15 can also be polyethylene, honeycomb paper, and other metal materials, as long as it can improve the bending resistance and strength of the solid rod 1.

[0035] Regarding the fit between the filling rod 15 and the hollow cylinder 14, it is preferable that the filling rod 15 and the hollow cylinder 14 have a clearance fit, so that the filling rod 15 can be easily inserted into the hollow cylinder 14, and then the filling rod 15 and the hollow cylinder 14 are fixed. In other embodiments of the present invention, the filling rod 15 and the hollow cylinder 14 may have an interference fit, so that after the filling rod 15 is inserted into the hollow cylinder 14, it does not need to be fixed. Of course, it is understood that the fit between the filling rod 15 and the hollow cylinder 14 can also be changed to other fits, and is not limited to clearance fit and interference fit.

[0036] When there is a clearance fit between the filling rod 15 and the hollow cylinder 14, it is necessary to fix the filling rod 15 and the hollow cylinder 14. Preferably, this is done by using glue and pins. First, glue is applied inside the hollow cylinder 14. Then, the filling rod 15 is inserted into the hollow cylinder 14. After it is inserted into place, the filling rod 15 and the hollow cylinder 14 are fixed together with pins. Glue also fixes the hollow cylinder 14 and the filling rod 15. This double fixation forms a solid rod 1. At the same time, by adding glue between the filling rod 15 and the hollow cylinder 14, the overall rigidity of the solid rod 1 is further improved. In other embodiments of the present invention, other fixing methods can also be used, as long as the filling rod 15 and the hollow cylinder 14 can be fixed in a clearance fit relationship.

[0037] During the testing phase, experiments were conducted on the tool's rod. A load of 80 kg was applied at a point 680 mm above the shoulder of the tool's rod. After unloading, the height decreased from 1095 mm to 1094 mm, with a deformation of 1 mm. The tool's rod showed no abnormalities under a load of 100 kg. Under a load of 110 kg, the tool's rod made a sound. Under a load of 120 kg, the tool broke. Compared to existing wooden and iron rods, this tool significantly improves bending resistance and strength. Embodiments of the present invention

[0038] The solid rod 1 includes a mating section 11, a connecting section 12, and a snap-fit ​​section 13. The mating section 11 can be connected to the connecting sleeve of the tool. The end of the mating section 11 away from the tool is fixedly connected to the connecting section 12. The end of the connecting section 12 away from the mating section 11 is fixedly connected to the snap-fit ​​section 13. Thus, the hollow cylinder 14 and the filling rod 15 are also provided with mating sections 11, connecting sections 12, and snap-fit ​​sections 13. The mating section 11 of the hollow cylinder 14 can be connected to the connecting sleeve of the tool. The end of the mating section 11 of the hollow cylinder 14 away from the tool is fixedly connected to the connecting section 12 of the hollow cylinder 14. The end of the connecting section 12 of the hollow cylinder 14 away from the mating section 11 of the hollow cylinder 14 is fixedly connected to the snap-fit ​​section 13 of the hollow cylinder 14. The mating section 11 of the filling rod 15 is fixedly connected to the connecting section 12 of the filling rod 15. The end of the connecting section 12 of the filling rod 15 away from the mating section 11 of the filling rod 15 is fixedly connected to the snap-fit ​​section 13 of the filling rod 15.

[0039] Regarding the shape of the mating section 11, it is preferably frustum-shaped. The large-diameter end face of the mating section 11 is fixedly connected to the connecting section 12, that is, the large-diameter end face of the mating section 11 of the hollow cylinder 14 is fixedly connected to the connecting section 12 of the hollow cylinder 14, and the large-diameter end face of the mating section 11 of the filling rod 15 is fixedly connected to the connecting section 12 of the filling rod 15. After the filling rod 15 is inserted into the hollow cylinder 14, the mating section 11 of the filling rod 15 engages with the mating section 11 of the hollow cylinder 14, limiting the position of the filling rod 15 so that the filling rod 15 cannot slide towards the small-diameter end face of the mating section 11. In other embodiments of the present invention, the mating section 11 can also be other shapes, as long as it can satisfy the requirement that the mating section 11 of the hollow cylinder 14 limits the position of the filling rod 15 after it is inserted into the hollow cylinder 14.

[0040] Regarding the shape of the snap-fit ​​section 13, it is preferably frustum-shaped. The small-diameter end face of the snap-fit ​​section 13 is fixedly connected to the connecting section 12, that is, the small-diameter end face of the snap-fit ​​section 13 of the hollow cylinder 14 is fixedly connected to the connecting section 12 of the hollow cylinder 14, and the small-diameter end face of the snap-fit ​​section 13 of the filling rod 15 is fixedly connected to the connecting section 12 of the filling rod 15. After the filling rod 15 is inserted into the hollow cylinder 14, the snap-fit ​​section 13 of the filling rod 15 snaps into the snap-fit ​​section 13 of the hollow cylinder 14, limiting the position of the filling rod 15 so that the filling rod 15 cannot slide to one end of the small-diameter end face of the snap-fit ​​section 13. In other embodiments of the present invention, the mating section 11 can also be other shapes, as long as it can satisfy the requirement that the snap-fit ​​section 13 of the hollow cylinder 14 limits the position of the filling rod 15 after the filling rod 15 is inserted into the hollow cylinder 14.

[0041] Regarding the minor diameter end face and the major diameter end face, in a frustum of a cone, the end with a smaller diameter is called the minor diameter end face, and the end with a larger diameter is called the major diameter end face.

[0042] Preferably, the hollow cylinder 14 mating section 11 has an external octagonal cross section on the basis of a frustum shape, which facilitates the insertion of the hollow cylinder 14 mating section 11 into the connecting pants of the tool working part, and the solid rod 1 will not rotate after being connected with the connecting pants of the tool working part. In other embodiments of the present invention, the hollow cylinder 14 mating section 11 has other numbers of cross sections on the basis of a frustum shape, as long as it can facilitate the insertion of the hollow cylinder 14 mating section 11 into the connecting pants of the tool working part.

[0043] This tool also includes a handheld handle 2, which is detachably connected to the end of the solid rod 1 away from the working part of the tool, making the tool detachable and easy to carry and use.

[0044] Preferably, the handheld lever 2 includes a handheld portion 21 and a plug-in portion 22, which are fixedly connected. The diameter of the handheld portion 21 is larger than the diameter of the plug-in portion 22, so that a limiting surface 24 is provided at the connection between the handheld portion 21 and the plug-in portion 22. Furthermore, the length of the locking section 13 of the hollow cylinder 14 is longer than the length of the locking section 13 of the filling rod 15, so that after the filling rod 15 is inserted into the hollow cylinder 14, a cavity 16 is formed between the hollow cylinder 14 and the filling rod 15. During connection, the insertion part 22 is inserted into the cavity 16 inside the solid rod 1, and the limiting surface 24 is in contact with the end face of the hollow cylinder 14. In other embodiments of the present invention, a cavity 16 may also be provided on the hand handle 2, and the length of the locking section 13 of the hollow cylinder 14 is shorter than the length of the locking section 13 of the filling rod 15, so that when the hand handle 2 is connected to the solid rod 1, the locking section 13 on the solid rod 1 is inserted into the cavity 16 of the hand handle 2, as long as the insertion part 22 can be inserted into the cavity 16.

[0045] Preferably, threaded grooves are provided on the insertion part 22 and the cavity 16. When the hand handle 2 is connected to the solid rod 1, the hand handle 2 or the solid rod 1 can be rotated to screw the threaded groove on the insertion part 22 into the threaded groove on the cavity 16, thereby fixing the hand handle 2 and the solid rod 1. In other embodiments of the present invention, a snap-fit ​​assembly or other structure may also be provided on the insertion part 22 and the cavity 16, as long as the insertion part 22 and the cavity 16 can be detachably connected.

[0046] A mating rod 23 is fixedly connected to the end of the insertion part 22 away from the handheld part 21. A groove 17 is provided at the end of the filling rod 15 facing the cavity 16. When the handheld rod 2 is connected to the solid rod 1, the mating rod 23 on the insertion part 22 is inserted into the groove 17 on the filling rod 15. In other embodiments of the present invention, the mating rod 23 can also be fixedly connected in the cavity 16, and the groove 17 can be provided on the insertion part 22, so that when the handheld rod 2 is connected to the solid rod 1, the mating rod 23 on the filling rod 15 is inserted into the groove 17 on the insertion part 22, as long as the mating rod 23 can be inserted into the groove 17.

[0047] Preferably, threaded grooves are provided on the mating rod 23 and the groove 17. When the handheld rod 2 is connected to the solid rod 1, the handheld rod 2 or the solid rod 1 can be rotated to screw the threaded groove on the mating rod 23 into the threaded groove on the groove 17, thereby fixing the handheld rod 2 and the solid rod 1. In other embodiments of the present invention, a snap-fit ​​assembly or other structure may also be provided on the mating rod 23 and the groove 17, as long as the insertion part 22 can be detachably connected to the cavity 16.

[0048] A connecting sleeve 3 is fitted onto the hollow cylinder 14. The connecting sleeve 3 can rotate relative to the hand handle 2. A limiting sleeve 31 is fixedly connected to the hand handle 2. The limiting sleeve 31 limits the axial sliding path of the connecting sleeve 3. The connecting sleeve 3 has a threaded groove. It is screwed into the connecting pants of the tool working part through the threaded groove on the connecting sleeve 3. After the mating section 11 of the solid rod 1 is connected to the connecting pants of the tool working part, the connecting sleeve 3 is screwed into the connecting pants of the tool working part for fixation. The limiting sleeve 31 limits the connecting sleeve 3 so that after the connecting sleeve 3 is screwed into the connecting pants of the tool working part, the limiting sleeve 31 abuts against the connecting sleeve 3, ensuring the stability of the connection with the connecting pants of the tool working part.

[0049] Regarding the fixing method of the limiting sleeve 31, it is preferred to fix it with a pin. A through hole is provided on the limiting sleeve 31, and the pin is inserted through the through hole and extends into the filling rod 15, so that the limiting sleeve 31 is fixed to the hollow cylinder 14 and the filling rod 15, and the hollow cylinder 14 and the filling rod 15 are fixed again. In other embodiments of the present invention, it can also be fixed by other means, as long as it can achieve the goal of fixing the limiting sleeve 31 to the hollow cylinder 14 and the filling rod 15.

[0050] The handheld pole 2 can be made of ordinary material or the same material as the solid pole 1.

[0051] The tool rod disclosed in this invention is suitable for the rapid connection and installation of tool rods and tool working parts. The various rods within the tool rod can be assembled in a simple way, which is simple, convenient and quick, and can achieve rapid assembly and disassembly. Industrial applicability

[0052] During the testing phase, experiments were conducted on the tool's rod. A load of 80 kg was applied at a point 680 mm above the shoulder of the tool's rod. After unloading, the height decreased from 1095 mm to 1094 mm, with a deformation of 1 mm. The tool's rod showed no abnormalities under a load of 100 kg. Under a load of 110 kg, the tool's rod made a sound. Under a load of 120 kg, the tool broke. Compared to existing wooden and iron rods, this tool significantly improves bending resistance and strength.

Claims

1. A tool rod, characterized in that, It includes a hollow cylinder, one end of which can be connected to the connecting pants of the tool working part. A filling rod is provided inside the hollow cylinder, which can be inserted into the hollow cylinder. After the filling rod is inserted into the hollow cylinder, the filling rod is fixed to the hollow cylinder to form a solid rod.

2. The tool rod according to claim 1, characterized in that, The filling rod and the hollow cylinder are fitted with a clearance.

3. The tool rod according to claim 2, characterized in that, The filling rod is glued to the hollow cylinder.

4. The tool rod according to claim 1, characterized in that, An interference fit is made between the filling rod and the hollow cylinder.

5. The tool rod according to claim 1, characterized in that, The solid rod includes a mating section, a connecting section, and a snap-fit ​​section. The mating section can be connected to the connecting sleeve of the tool. The end of the mating section away from the tool is fixedly connected to the connecting section. The end of the connecting section away from the mating section is fixedly connected to the snap-fit ​​section.

6. The tool rod according to claim 5, characterized in that, The mating section is frustum-shaped, and the large-diameter end face of the mating section is fixedly connected to the connecting section. After the filling rod is inserted into the hollow cylinder, the mating section of the filling rod is engaged with the mating section of the hollow cylinder.

7. The tool rod according to claim 5, characterized in that, The snap-fit ​​section is frustum-shaped, and the small-diameter end face of the snap-fit ​​section is fixedly connected to the connecting section. After the filling rod is inserted into the hollow cylinder, the mating section of the snap-fit ​​section snaps into the snap-fit ​​section of the hollow cylinder.

8. The tool rod according to claim 6, characterized in that, The length of the hollow cylinder clamping section is longer than the length of the filling rod clamping section, so that a cavity is formed between the hollow cylinder and the filling rod after the filling rod is inserted into the hollow cylinder.

9. The tool rod according to claim 5, characterized in that, The mating section of the hollow cylinder has an outward octagonal cross section.

10. The tool rod according to claim 1, characterized in that, It also includes a handheld handle, which is detachably connected to the end of the solid rod furthest from the tool's working part.

11. The tool member according to claim 8 or 10, characterized in that, The handheld rod includes a handheld part and a plug-in part. The handheld part and the plug-in part are fixedly connected. The diameter of the handheld part is larger than the diameter of the plug-in part. A limiting surface is provided at the connection between the handheld part and the plug-in part. When the handheld rod is connected to a solid rod, the plug-in part is inserted into the cavity on the hollow rod, and the limiting surface is in contact with the end face of the hollow cylinder.

12. The tool member according to claim 11, characterized in that, The plug and cavity are provided with threaded grooves. When the handle is connected to the solid rod, the threaded groove on the plug and the threaded groove on the cavity are screwed together.

13. The tool member according to claim 11, characterized in that, A mating rod is fixedly connected to the end of the insertion part away from the handheld part. A groove is provided at the end of the filling rod facing the cavity. When the handheld rod is connected to the solid rod, the mating rod is inserted into the groove.

14. The tool member according to claim 13, characterized in that, The mating rod and the groove are provided with threaded grooves. When the hand handle is connected to the solid rod, the threaded groove on the mating rod is screwed into the threaded groove on the groove.

15. The tool rod according to claim 1, characterized in that, A connecting sleeve is fitted onto the hollow cylinder. The connecting sleeve can rotate relative to the hand handle. A limit sleeve is fixedly connected to the hand handle to limit the axial sliding path of the connecting sleeve. A threaded groove is provided on the connecting sleeve, and the connecting sleeve is screwed to the connecting sleeve of the tool working part through the threaded groove on the connecting sleeve.

16. The tool member according to claim 15, characterized in that, The limiting sleeve has a through hole, through which the pin is inserted and inserted into the filling rod.

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