Powered ratchet tools

Abstract

This invention includes a connector, a crankshaft, a bearing, and a ratchet working assembly. The connector includes a connecting tube and a ratchet shank integrally formed in the connecting tube; the ratchet shank includes two spaced-apart limiting arms and a bridging section connecting the periphery of the two limiting arms; the crankshaft is rotatably inserted into the connecting tube; the bearing is sleeved on the crankshaft, located inside the connecting tube, and abuts against the connecting tube and the crankshaft; the ratchet working assembly is connected to the ratchet yoke and has a working head. This invention integrally connects the connecting tube and the ratchet shank, and connects the two limiting arms with the bridging section, which enhances the structural strength of this invention and solves the problem that existing power ratchet tools cannot provide sufficient length while maintaining structural strength, providing a power ratchet tool that can penetrate into confined installation spaces and withstand high torque.

Description

Technical Field

[0001] The present invention relates to a power tool, in particular to a power ratchet tool that can penetrate into a narrow installation space and has better structural strength. Prior Art

[0002] In order to disassemble and install fasteners such as bolts and nuts, a power tool that is driven by compressed gas or electricity to rotate the fasteners and then tighten or loosen the fasteners is widely used by people to save manpower.

[0003] However, traditional power tools, driven by compressed gas or electricity, typically have complex drive mechanisms and are relatively large. Therefore, they are not suitable for use in confined spaces like engine compartments, where components are tightly packed. To facilitate access to tight spaces for fastener removal and installation, existing power tools are designed with a slender appearance.

[0004] A conventional power ratchet tool 90 capable of fitting into narrow installation spaces is shown in Figure 6. Its main components include a connector 91, a ratchet handle 92, a crankshaft 93, a ratchet yoke 94, and a connecting nut 95. Connector 91 is a long tube. Ratchet handle 92 is coupled to one end of connector 91. Crankshaft 93 passes through connector 91. Ratchet yoke 94 is connected to crankshaft 93 and located within ratchet handle 92. Connecting nut 95 is located at the other end of connector 91 and is used to connect to a speed change mechanism, enabling conventional power ratchet tool 90 to be connected to a drive device powered by a cylinder or motor through the speed change mechanism.

[0005] Due to current manufacturing technology limitations, it's impossible to form a workpiece that combines sufficient length and structural strength in a single piece. As shown in Figure 6 , to increase the length of a conventional power ratchet tool 90, a long tubular connector 91 is screwed to a ratchet handle 92. To install a ratchet yoke 94 within the ratchet handle 92, the ratchet handle 92 has an installation opening 921 for insertion. The installation opening 921 of the ratchet handle 92 of the conventional power ratchet tool 90 extends nearly the entire circumference of the ratchet handle 92.

[0006] However, the screw-locked connector 91 and ratchet handle 92 are prone to becoming loose due to vibration over extended use of the power ratchet tool 90. Furthermore, the mounting opening 921 of the ratchet handle 92, which extends almost entirely around the entire periphery, makes it susceptible to damage. This suggests that existing power ratchet tools still have room for improvement and enhancement. Summary of the Invention

[0007] In view of the aforementioned shortcomings and deficiencies of the prior art, the present invention provides a power ratchet tool that integrates a connector and a ratchet handle into a single component, thereby increasing the length of the power ratchet tool while maintaining its structural strength.

[0008] In order to achieve the above-mentioned creative purpose, the technical means adopted in this creation is a power ratchet tool, which includes: A connecting piece comprising a connecting tube and a ratchet handle; The connecting pipe includes two ends positioned opposite to each other; The ratchet handle is integrally formed at one end of the connecting tube and includes two limiting arms and a bridging section; the two limiting arms extend away from the connecting tube and are spaced apart; the bridging section is connected to the periphery of the two limiting arms; a crank shaft rotatably inserted into the connecting tube; At least one bearing, each bearing sleeve is disposed on the crankshaft and located within the connecting tube and tightly against the connecting tube and the crankshaft; a ratchet yoke, which is swingably disposed in the ratchet handle, between the two limiting arms and connected to the crank shaft; and A ratchet working assembly is connected to the ratchet yoke and includes a working head.

[0009] Furthermore, in the power ratchet tool, the bridging section and the connecting tube are respectively located at opposite ends of the ratchet handle.

[0010] Furthermore, in the power ratchet tool, the connecting tube includes two opposite ends, a passage, and at least one bearing mounting section; the passage extends to both ends of the connecting tube; the at least one bearing mounting section is located within the connecting tube, and the inner diameter of each bearing mounting section is smaller than the inner diameter of the passage; the at least one bearing is respectively tightly abutted against the at least one bearing mounting section and the crankshaft.

[0011] Furthermore, in the power ratchet tool, one of the bearing mounting sections is close to the ratchet handle.

[0012] Furthermore, in the power ratchet tool, the connecting pipe includes two bearing mounting sections, and the two bearing mounting sections are respectively close to the two ends of the connecting pipe.

[0013] Furthermore, in the power ratchet tool, the length of the connecting piece is greater than or equal to 150 mm and less than or equal to 180 mm.

[0014] Furthermore, in the power ratchet tool, the outer diameter of the connecting tube is 24 mm.

[0015] The technical means of this invention offer enhanced effectiveness in that the connecting piece of the power ratchet tool is a single component, formed integrally from the connecting tube and the ratchet handle. This not only saves time and effort in disassembling and assembling the connecting tube and the ratchet handle, but also prevents the connecting tube and the ratchet handle from becoming loose due to prolonged use and vibration. Furthermore, the ratchet handle of the connecting piece of this invention connects the two limiting arms with a bridging section, which strengthens the structural strength of the ratchet handle and extends the service life of this invention. In short, this invention integrally connects the connecting tube and the ratchet handle, and connects the two limiting arms with a bridging section, allowing this invention to have both sufficient length and structural strength, allowing it to penetrate into narrow installation spaces with compact parts distribution and withstand high torque to complete the high-intensity operation of tightening or loosening fasteners. Simple diagram description

[0016] Figure 1 is a three-dimensional schematic diagram of the appearance of this creation. Figure 2 is a schematic diagram of the component breakdown of this invention. Figure 3 is a cross-sectional schematic diagram of this invention. FIG4 is a schematic cross-sectional view of the connector of the present invention. FIG5 is a partially enlarged schematic diagram of the connecting member of the present invention. FIG6 is a schematic diagram of the exploded components of a conventional power ratchet tool. Implementation Method

[0017] The following, in conjunction with diagrams and preferred embodiments of this invention, further explains the technical means adopted by this invention to achieve the intended creative purpose.

[0018] As shown in FIG. 1 to FIG. 4 , a preferred embodiment of the power ratchet tool of the present invention includes a connecting member 10 , a crank shaft 20 , two bearings 30 , a circular bushing 40 , a ratchet yoke 50 and a ratchet working assembly 60 .

[0019] As shown in Figures 1 to 4, the connector 10 is used to connect to a drive device that provides power. The connector 10 includes a connecting tube 11 and a ratchet handle 12. The connecting tube 11 includes two opposite ends, a coupling section 111, a channel 112, and two bearing mounting sections 113. The coupling section 111 is located at one end of the connecting tube 11. Its outer circumference is provided with threads for screw connection. It can be connected to a planetary gear set 80 via a connecting nut 70, thereby connecting to the drive device. The channel 112 extends to both ends of the connecting tube 11. The two bearing mounting sections 113 are located within the connecting tube 11 and are respectively adjacent to the ends of the connecting tube 11. One of the bearing mounting sections 113 is adjacent to the ratchet handle 12. The inner diameter d of each bearing mounting section 113 is smaller than the inner diameter D of the channel 112. In practice, the inner diameter of one of the bearing mounting sections 113 near the coupling section 111 can be designed to be slightly larger than the inner diameter of the other bearing mounting section 113 near the ratchet handle 12, so that a feeler gauge can be smoothly inserted into the increased length of the connecting tube 11 of the present invention to measure the inner diameter of the bearing mounting section 113 near the ratchet handle 12.

[0020] As shown in Figures 1 to 4, the ratchet handle 12 is integrally formed at the other end of the connecting tube 11 and is located opposite the coupling section 111. As shown in Figure 5, the ratchet handle 12 includes two limiting arms 121 and a bridging section 122. The two limiting arms 121 extend from the connecting tube 11 away from the coupling section 111 and away from the connecting tube 11, and the two limiting arms 121 are spaced apart. Each limiting arm 121 is provided with a through hole. The bridging section 122 is connected to the periphery of the two limiting arms 121, so that the ratchet handle 12 forms two openings 123.

[0021] In a preferred embodiment of the present invention, the bridging section 122 is positioned opposite to the connecting tube 11 , and the bridging section 122 and the connecting tube 11 are respectively located at opposite ends of the ratchet handle 12 .

[0022] As shown in Figures 1 to 4, specifically, in order to take into account the length and structural strength of the power ratchet tool of the present invention, the length L of the connecting member 10 is greater than or equal to 150 mm and less than or equal to 180 mm; the outer diameter O of the connecting tube 11 of the connecting member 10 is 24 mm.

[0023] As shown in Figures 1 to 4, the crankshaft 20 is used to transmit power and drive the ratchet yoke 50. The crankshaft 20 is rotatably inserted into the connecting tube 11 of the connector 10 and includes a rod 21 and a mounting post 22. The rod 21 includes two opposing ends; the mounting post 22 is eccentrically disposed relative to the rod 21, located at one end of the rod 21 and proximate to the ratchet handle 12.

[0024] As shown in Figures 1 to 4, the two bearings 30 are sleeved on the rod body 21 of the crankshaft 20 and located in the channel 112 of the connecting tube 11. The two bearings 30 are respectively tightly abutted against the two bearing mounting sections 113 of the connecting tube 11 and the rod body 21 of the crankshaft 20, so that the crankshaft 20 can be rotatably inserted into the connecting tube 11 of the connecting member 10.

[0025] As shown in Figures 1 to 4, the circular bushing 40 is sleeved on the mounting post 22 of the crankshaft 20. Since the detailed structure of the circular bushing 40 is already known in the prior art, this invention will not be further described here.

[0026] As shown in Figures 1 to 4, the ratchet yoke 50 is swingably mounted within the ratchet handle 12 and between the two limiting arms 121 of the ratchet handle 12. The ratchet yoke 50 includes a through-hole 51 and a receiving opening 52. The inner circumference of the through-hole 51 is provided with a plurality of meshing teeth. The receiving opening 52 is sleeved onto the circular bushing 40, coupling the ratchet yoke 50 to the crankshaft 20.

[0027] As shown in Figures 1 to 4, the ratchet working assembly 60 includes a working head 61 for rotating the fastener; the ratchet working assembly 60 uses a tooth (not shown) to engage with the meshing teeth on the inner circumference of the through hole 51 of the ratchet yoke 50, so that the ratchet working assembly 60 is connected to the ratchet yoke 50. Since the connection relationship between the ratchet working assembly 60 and the ratchet yoke 50 is also the existing technology, it will not be further explained in this invention.

[0028] As shown in Figures 1 to 5, when assembling the power ratchet tool of the present invention, the two bearings 30 can be placed on the rod body 21 of the crank shaft 20, and then the crank shaft 20 and the two bearings 30 are inserted into the connecting tube 11 of the connecting member 10, so that the two bearings 30 are respectively located in the two bearing mounting sections 113, so that each bearing 30 is tightly against the connecting tube 11 and the rod body 21 of the crank shaft 20.

[0029] As shown in Figures 1 to 5 , the ratchet yoke 50 and the circular bushing 40 are then inserted through the opening 123 of the ratchet handle 12, thereby conveniently installing the ratchet yoke 50 and the circular bushing 40 within the ratchet handle 12. Finally, the ratchet working assembly 60 is inserted into the through hole 51 of the ratchet yoke 50, completing the assembly of the present invention.

[0030] Compared to the existing power ratchet tool 90, which utilizes a connecting member 91 and a ratchet handle 92 as two detachable components, the connecting tube 11 and ratchet handle 12 of the present invention are integrally formed to form the connecting member 10. Because the connecting member 10 is a single component, the time and effort required to assemble and disassemble the connecting tube 11 and ratchet handle 12 are eliminated. Furthermore, even after prolonged use, the connecting tube 11 and ratchet handle 12 will not become loose due to vibration.

[0031] Furthermore, the present invention connects the two limiting arms 121 with the bridging section 122; compared to the existing power ratchet tool 90 in which the mounting opening 921 extends almost to the entire periphery of the ratchet handle 92, the bridging section 122 of the present invention forms two smaller openings 123, thereby enhancing the structural strength of the ratchet handle 12 without compromising the installation convenience.

[0032] The above is only a preferred embodiment of the present invention and does not constitute any form of limitation on the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes or modifications to equivalent embodiments of the present invention using the technical content disclosed above without departing from the scope of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention are still within the scope of the present invention.

[0033] 10: Connectors 11: Connecting pipe 111: Combined segment 112: Channel 113: Bearing installation section 12: Ratchet handle 121: Limiting arm 122: Bridge segment 123: Open 20: Crankshaft 21: Rod body 22: Mounting column 30: Bearing 40: Round bushing 50: Ratchet yoke 51:Piercing 52: Mouth 60: Ratchet working component 61: Working head 70: Connecting nut 80:Planetary gear set 90:Power ratchet tool 91: Connector 92: Ratchet handle 93: Crankshaft 94: Ratchet yoke 95: Connecting nut D:Inner diameter d:inner diameter L: Length O: outer diameter

Claims

1. A power ratchet tool, comprising: a connecting member, comprising a connecting tube and a ratchet handle; the connecting tube comprises two opposite ends; the ratchet handle is integrally formed at one end of the connecting tube and comprises two limiting arms and a bridging section; the two limiting arms extend away from the connecting tube from the connecting tube, and the two limiting arms are spaced apart; the bridging section is connected to the periphery of the two limiting arms; a crank shaft, which is rotatably inserted into the connecting tube; at least one bearing, each bearing sleeve is disposed on the crank shaft, located in the connecting tube and tightly abuts against the connecting tube and the crank shaft; a ratchet yoke, which is swingably disposed in the ratchet handle, between the two limiting arms and connected to the crank shaft; and a ratchet working assembly, which is connected to the ratchet yoke and comprises a working head; wherein the length of the connecting member is greater than or equal to 150 mm and less than or equal to 180 mm.

2. The power ratchet tool as claimed in claim 1, wherein the bridging section and the connecting tube are located at opposite ends of the ratchet handle.

3. A power ratchet tool as described in claim 2, wherein the connecting tube includes two opposite ends, a channel, and at least one bearing mounting section; the channel extends to both ends of the connecting tube; the at least one bearing mounting section is located within the connecting tube, and the inner diameter of each bearing mounting section is smaller than the inner diameter of the channel; and the at least one bearing is respectively tightly abutted against the at least one bearing mounting section and the crankshaft.

4. The power ratchet tool as claimed in claim 3, wherein one of the bearing mounting sections is adjacent to the ratchet handle.

5. The power ratchet tool as described in claim 3, wherein the connecting pipe includes two bearing mounting sections, and the two bearing mounting sections are respectively close to the two ends of the connecting pipe.

6. The power ratchet tool as claimed in claim 1, wherein the outer diameter of the connecting tube is 24 mm.

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