A replaceable long and short handle ratchet wrench

Abstract

The utility model discloses a replaceable long and short handle's ratchet wrench belongs to electric tool technical field, including the casing, head shell, ratchet head subassembly, head shell bolt is fixed in the casing, is provided with the planet carrier with ratchet wrench motor gear drive in the head shell, ratchet head subassembly includes ratchet head shell and bearing install in the eccentric shaft of ratchet head shell, eccentric shaft bottom end from ratchet head shell inside stretches out, and with planet carrier plug -in transmission connection, ratchet head shell and head shell detachable fixed connection, the junction of ratchet head shell and head shell still is provided with the sealing element for sealing, the head shell and ratchet head of this application split, and ratchet head can replace: carry different ratchet head subassembly and different handle section when using, can according to the space restriction and torque demand that the scene meets, select ratchet head subassembly and handle section and combine, adapt to different working conditions, and, reduce the number of required carrying tool, improve the utilization rate and portability of tool box.

Description

Technical Field

[0001] This utility model belongs to the field of power tool technology, specifically to a ratchet wrench with interchangeable long and short handles. Background Technology

[0002] Electric ratchet wrenches are generally used for tightening and loosening bolts in confined spaces (such as inside a car engine compartment, inside equipment, between pipes, corners, etc.). The operating space varies depending on the working conditions. If the space is insufficient, the ratchet wrench may not be able to swing, or its swing range may be blocked by surrounding obstacles. Furthermore, the ratchet head on the market is currently fixed to the motor or housing with screws. If you want to change the length of the ratchet head or the type of square head, you need to disassemble and replace the entire machine, which is complicated and can easily damage the electric ratchet wrench. The traditional approach is to carry a complete set of ratchet wrenches of different lengths (short, medium, long) or a large number of extension rods, which takes up a lot of toolbox space, increases weight, and is inconvenient to carry. Utility Model Content

[0003] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a ratchet wrench with replaceable long and short handles. This application provides the following technical solution:

[0004] The device includes a housing, a head housing, a ratchet head assembly, and the head housing bolted inside the housing. A planetary carrier, which is geared and drives the ratchet wrench motor, is housed within the head housing. The ratchet head assembly includes a ratchet head housing and an eccentric shaft with bearings mounted within the ratchet head housing. The bottom end of the eccentric shaft extends from the ratchet head housing and is plugged into the planetary carrier for a drive-through connection. The ratchet head housing is detachably and fixedly connected to the head shell, and a sealing element for sealing is provided at the junction of the ratchet head housing and the head shell.

[0005] A conical seat is provided at one end of the ratchet head housing near the head shell, and an annular connecting seat is provided at one end of the head shell near the ratchet head housing. The conical seat is fixedly connected to the annular connecting seat by screws.

[0006] The conical seat is provided with protrusions evenly distributed, and the annular connecting seat is provided with corresponding recesses. When the conical seat and the annular connecting seat are connected, the protrusions are embedded in the recesses.

[0007] The number of screws is the same as the number of protrusions, and they are all evenly distributed in a circle around the eccentric axis.

[0008] The ratchet wrench has motor teeth mounted on its motor output shaft. Multiple mounting shafts are fixed on the planetary carrier, and rotatable planetary gears are mounted on the mounting shafts. The motor teeth mesh with the planetary gears. A gear ring is fixed inside the head housing, and the planetary gears also mesh with the gear ring. A slot is provided at the center of the planetary carrier. A spline is provided at the bottom end of the eccentric shaft. The bottom end of the eccentric shaft is plugged into and connected to the slot and engages with a keyway.

[0009] The sealing element includes a transverse sealing part and a longitudinal sealing part. The transverse sealing part is disposed between the side wall of the planetary carrier and the inner wall of the head shell, and the longitudinal sealing part is disposed between the bottom of the ratchet head outer shell and the upper end face of the planetary carrier.

[0010] The sealing element includes a second transverse sealing part and a second longitudinal sealing part. The second transverse sealing part is disposed between the side wall of the planetary carrier and the inner wall of the head shell, and the second longitudinal sealing part is disposed between the conical seat and the annular connecting seat.

[0011] The seal is made of high-hardness, wear-resistant silicone material.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. The ratchet head and ratchet housing are detachable and the ratchet head is replaceable: When in use, it carries several ratchet head assemblies of different lengths and handle sections with different torque output performance, offering multiple combinations. Depending on space constraints and torque requirements encountered on-site, the appropriate ratchet head assembly and handle section can be selected for combination, adapting to different working conditions and achieving "one handle for multiple uses," improving work efficiency. It also significantly reduces the number, size, and weight of tools required, increasing the utilization rate and portability of the toolbox. Furthermore, the replaceable ratchet head assembly design facilitates the addition of lubricating oil to the gearbox, extending product lifespan and enhancing the user experience.

[0013] 2. The use of silicone seals to prevent interference sealing between the ratchet head assembly and the head housing serves to prevent oil leakage from the gearbox after the ratchet head assembly is replaced.

[0014] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of an embodiment of a ratchet wrench with interchangeable long and short handles.

[0017] Figure 2 This is a partially enlarged cross-sectional view of an embodiment of a ratchet wrench with interchangeable long and short handles.

[0018] Figure 3 An exploded view of an embodiment of a ratchet wrench with interchangeable long and short handles.

[0019] Figure 4 This is a schematic diagram of a sealing element in an embodiment of a ratchet wrench with interchangeable long and short handles.

[0020] Figure 5 This is a cross-sectional view of a second embodiment of a ratchet wrench with interchangeable long and short handles.

[0021] Figure 6 This is a partially enlarged cross-sectional view of an embodiment two of a ratchet wrench with interchangeable long and short handles.

[0022] Figure 7 An exploded view of embodiment two of a ratchet wrench with interchangeable long and short handles.

[0023] Figure 8 This is a schematic diagram of the sealing element in Embodiment 2 of a ratchet wrench with interchangeable long and short handles.

[0024] Figure 9 This is a schematic diagram of the connection structure between the ratchet head housing and the head shell of a ratchet wrench with interchangeable long and short handles.

[0025] Figure 10 This is a schematic diagram of the connection structure between the eccentric shaft and the planetary carrier of a ratchet wrench with interchangeable long and short handles.

[0026] Reference numerals: 1. Housing; 2. Head housing; 21. Annular connecting seat; 211. Notch; 22. Gear ring; 3. Ratchet head assembly; 31. Ratchet head housing; 311. Conical seat; 312. Protrusion; 32. Eccentric shaft; 321. Spline; 33. Screw; 4. Ratchet wrench motor; 41. Motor gear; 5. Planetary carrier; 51. Mounting shaft; 52. Planetary gear; 53. Slot; 6. Seal; 61. Lateral seal part one; 62. Longitudinal seal part one; 63. Lateral seal part two; 64. Longitudinal seal part two. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] Please refer to Figure 1-10 As shown, this utility model provides a replaceable long and short handle ratchet wrench, including a housing 1, a head housing 2, a ratchet head assembly 3, and the head housing 2 bolted inside the housing 1. The head housing 2 is provided with a planetary carrier 5 that is geared to the ratchet wrench motor 4. The ratchet head assembly 3 includes a ratchet head housing 31 and an eccentric shaft 32 with a bearing installed inside the ratchet head housing 31. The bottom end of the eccentric shaft 32 extends out from the ratchet head housing 31 and is plugged into the planetary carrier 5 for transmission. The ratchet head housing 31 and the head housing 2 are detachably fixedly connected. A sealing element 6 is also provided at the junction of the ratchet head housing 31 and the head housing 2 for sealing.

[0031] A tapered seat 311 is provided at one end of the ratchet head housing 31 near the head housing 2, and an annular connecting seat 21 is provided at one end of the head housing 2 near the ratchet head housing 31. The tapered seat 311 is fixedly connected to the annular connecting seat 21 by screws 33.

[0032] The conical seat 311 is uniformly provided with protrusions 312, and the annular connecting seat 21 is provided with corresponding recesses 211. When the conical seat 311 and the annular connecting seat 21 are connected, the protrusions 312 are embedded in the recesses 211.

[0033] The number of screws 33 and protrusions 312 is the same, and they are evenly distributed around the circumference of the eccentric shaft 32. That is, the connection structure between the ratchet head housing 31 and the head housing 2 is rotationally symmetrical. Specifically, the number of screws 33 and protrusions 312 is preferably 3 or 4. In use, the ratchet head housing 31 can be rotated 120 or 90° and multiples thereof to connect with the head housing 2. The user can adjust the angle of the working part of the ratchet head assembly relative to the handle section.

[0034] The output shaft of the ratchet wrench motor 4 is fitted with motor teeth 41. Multiple mounting shafts 51 are fixed on the planetary carrier 5. Rotatable planetary gears 52 are mounted on the mounting shafts 51. The motor teeth 41 mesh with the planetary gears 52. A gear ring 22 is fixed inside the head housing 2. The planetary gears 52 also mesh with the gear ring 22. A slot 53 is provided in the center of the planetary carrier 5. A spline 321 is provided at the bottom end of the eccentric shaft 32. The bottom end of the eccentric shaft 32 is plugged into and connected to the slot 53 and engaged with a keyway.

[0035] like Figure 1-4 As shown, this application provides an embodiment of a sealing element 6, which includes a transverse sealing part 61 and a longitudinal sealing part 62. The transverse sealing part 61 is placed between the side wall of the planetary carrier 5 and the inner wall of the head shell 2, and the longitudinal sealing part 62 is placed between the bottom of the ratchet head outer shell 31 and the upper end face of the planetary carrier 5.

[0036] like Figure 5-6 As shown, this application provides another embodiment of the sealing element 6, which includes a second transverse sealing part 63 and a second longitudinal sealing part 64. The second transverse sealing part 63 is disposed between the side wall of the planetary carrier 5 and the inner wall of the head shell 2, and the second longitudinal sealing part 64 is disposed between the conical seat 311 and the annular connecting seat 21.

[0037] The seal 6 is made of high-hardness wear-resistant silicone material, specifically silicone with a hardness of 75A or higher.

[0038] In practice, one or more ratchet wrenches with different torque output power and several ratchet head assemblies 3 of different lengths are used as a set. Then, according to the on-site work requirements, select the appropriate length of ratchet head assembly 3 and the output power of the ratchet wrench. Replace the selected ratchet head assembly 3 with the selected ratchet wrench. When replacing, keep the ratchet head part of the ratchet wrench facing upwards, loosen the original screw 33 on the ratchet wrench to remove the original ratchet head assembly 3, then align the eccentric shaft 32 of the selected ratchet head assembly 3 with the slot 53 of the planetary carrier 5 and insert it. Then put the original screw 33 back in and tighten it to complete the replacement of the ratchet head assembly 3.

[0039] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A ratchet wrench with interchangeable long and short handles, comprising a housing (1), a head housing (2), a ratchet head assembly (3), and the head housing (2) being bolted into the housing (1), wherein the head housing (2) is provided with a planetary carrier (5) that is geared to a ratchet wrench motor (4), characterized in that: The ratchet head assembly (3) includes a ratchet head housing (31) and an eccentric shaft (32) with a bearing installed inside the ratchet head housing (31). The bottom end of the eccentric shaft (32) extends out from inside the ratchet head housing (31) and is plugged into the planetary carrier (5). The ratchet head housing (31) is detachably and fixedly connected to the head shell (2). A sealing element (6) for sealing is also provided at the junction of the ratchet head housing (31) and the head shell (2).

2. A ratchet wrench with interchangeable long and short handles as described in claim 1, characterized in that: The ratchet head housing (31) is provided with a conical seat (311) at one end near the head housing (2), and the head housing (2) is provided with an annular connecting seat (21) at one end near the ratchet head housing (31). The conical seat (311) is fixedly connected to the annular connecting seat (21) by screws (33).

3. A ratchet wrench with interchangeable long and short handles as described in claim 2, characterized in that: The conical seat (311) is uniformly provided with protrusions (312), and the annular connecting seat (21) is provided with a corresponding notch (211). When the conical seat (311) is connected to the annular connecting seat (21), the protrusions (312) are embedded in the notch (211).

4. A ratchet wrench with interchangeable long and short handles as described in claim 3, characterized in that: The number of screws (33) and the number of protrusions (312) are the same, and they are all evenly distributed around the circumference of the eccentric shaft (32).

5. A ratchet wrench with interchangeable long and short handles as described in claim 1, characterized in that: The output shaft of the ratchet wrench motor (4) is fitted with motor teeth (41), and multiple mounting shafts (51) are fixed on the planetary carrier (5). Rotatable planetary gears (52) are mounted on the mounting shafts (51). The motor teeth (41) mesh with the planetary gears (52). A gear ring (22) is fixed inside the head shell (2). The planetary gears (52) also mesh with the gear ring (22). A slot (53) is provided in the center of the planetary carrier (5). A spline (321) is provided at the bottom end of the eccentric shaft (32). The bottom end of the eccentric shaft (32) is plugged into and connected to the slot (53) and keyway engaged.

6. A ratchet wrench with interchangeable long and short handles as described in claim 1, characterized in that: The seal (6) includes a transverse sealing part (61) and a longitudinal sealing part (62). The transverse sealing part (61) is placed between the side wall of the planetary carrier (5) and the inner wall of the head shell (2). The longitudinal sealing part (62) is placed between the bottom of the ratchet head shell (31) and the upper surface of the planetary carrier (5).

7. A ratchet wrench with interchangeable long and short handles as described in claim 3, characterized in that: The sealing element (6) includes a second transverse sealing part (63) and a second longitudinal sealing part (64). The second transverse sealing part (63) is placed between the side wall of the planetary carrier (5) and the inner wall of the head shell (2). The second longitudinal sealing part (64) is placed between the conical seat (311) and the annular connecting seat (21).

8. The ratchet wrench with interchangeable long and short handles as described in any of claims 6 to 7, characterized in that: The sealing element (6) is made of high-hardness wear-resistant silicone material.

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