An electric ratchet wrench

Abstract

This application discloses an electric ratchet wrench, belonging to the technical field of ratchet wrenches. An electric ratchet wrench includes: a handle, a connecting rod, and a wrench head; the connecting rod is fixedly connected to the handle; the wrench head is fixedly connected to the connecting rod; a drive shaft is rotatably connected to the connecting rod; a drive member is mounted on the handle for driving the rotation of the drive shaft; a ratchet is rotatably connected to the connecting rod; a first transmission member is mounted on the drive shaft for driving the ratchet to rotate; a second transmission member is mounted on the wrench head for driving the ratchet to rotate; wherein, when the first transmission member drives the ratchet to rotate, the second transmission member slips on the ratchet; when the second transmission member drives the ratchet to rotate, the first transmission member slips on the ratchet. The beneficial effect of this application is that it provides an electric ratchet wrench that can be used both electrically and manually.

Description

Technical Field

[0001] This application relates to the field of ratchet wrench technology, and more specifically, to an electric ratchet wrench. Background Technology

[0002] A ratchet wrench is a unidirectional rotating and effective tool primarily used for tightening and loosening screws. It is widely used and well-known. Ratchet wrenches generally come in manual and electric versions. Traditional manual ratchet wrenches have the advantage of high torque, but their disadvantage is that both tightening and loosening require manual operation, which is not only laborious but also prone to causing the screw to become stuck in the hole due to its looseness in the later stages of loosening, requiring manual removal. This makes them inconvenient to use.

[0003] Currently available electric ratchet wrenches, such as the automatic ratchet wrench disclosed in Chinese patent document CN2706281Y, work by a motor housed in the casing that drives bevel gears and a transmission element (output head) to rotate. The advantages of this type of electric ratchet wrench are its simple and labor-saving operation; however, its disadvantage is that it cannot continue operating when the battery is depleted, thus significantly limiting its use.

[0004] Therefore, an electric ratchet wrench with both electric and manual operation capabilities is provided. Utility Model Content

[0005] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] To address the technical problems mentioned in the background section, some embodiments of this application provide an electric ratchet wrench, comprising: a handle, a connecting rod, and a wrench head; the connecting rod is fixedly connected to the handle; the wrench head is fixedly connected to the connecting rod; a transmission shaft is rotatably connected to the connecting rod; a driving member is mounted on the handle for driving the rotation of the transmission shaft; a ratchet is rotatably connected to the connecting rod; a first transmission member is mounted on the transmission shaft for driving the ratchet to rotate; a second transmission member is mounted on the wrench head for driving the ratchet to rotate; wherein, when the first transmission member drives the ratchet to rotate, the second transmission member slips on the ratchet; when the second transmission member drives the ratchet to rotate, the first transmission member slips on the ratchet.

[0007] When screws need to be tightened electrically, the drive unit drives the transmission shaft to rotate, and the rotation of the transmission shaft drives the ratchet to rotate through the first transmission unit, thereby completing the tightening of the screws; when screws need to be tightened manually, the handle is turned, and the rotation of the handle drives the second transmission unit, and the second transmission unit drives the ratchet to rotate, thereby completing the manual tightening of the screws. Therefore, it can be used for both electric and manual tightening.

[0008] Furthermore, the first transmission component includes: a first gear, fixedly connected to the transmission shaft; a gear plate, rotatably connected to the wrench head and meshing with the first gear; a first pawl, mounted on the gear plate; and a first torsion spring, with its two ends fixedly connected to the gear plate and the first pawl, respectively.

[0009] Furthermore, the toothed disc includes a first mounting groove; the first pawl is located within the first mounting groove.

[0010] Furthermore, the second transmission component includes: a second pawl, mounted on the wrench head; and a second torsion spring, with its two ends fixedly connected to the second pawl and the wrench head, respectively.

[0011] Furthermore, the wrench head includes a receiving groove; the second torsion spring is located within the receiving groove.

[0012] Further, the driving component includes: a motor located inside the handle and fixedly connected to the handle; a first sun gear fixedly connected to the output shaft of the motor; a first mounting plate located on one side of the first sun gear; a first planetary gear rotatably connected to the first mounting plate and meshing with the first sun gear; a gear ring fixedly connected to the handle, with its inner side meshing with the first planetary gear; a second sun gear fixedly connected to the first mounting plate; a second planetary gear with its inner side meshing with the second sun gear and its outer ring meshing with the gear ring; a second mounting plate rotatably connected to the handle; and the second planetary gear rotatably connected to the second mounting plate.

[0013] Furthermore, the first planetary gear has multiple components, which are equidistantly distributed around the circumference of the first sun gear.

[0014] Furthermore, the second planetary gear has multiple components, which are equidistantly distributed around the circumference of the second sun gear.

[0015] Furthermore, the first planetary gear is located at one end of the first mounting plate; the second planetary gear is located at the other end of the first mounting plate.

[0016] Furthermore, the second mounting plate is located at one end of the drive shaft and is fixedly connected to the drive shaft.

[0017] The beneficial effect of this application is that it provides an electric ratchet wrench that can be used both electrically and manually. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0019] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0020] In the attached diagram:

[0021] Figure 1 This is an overall schematic diagram based on an embodiment of this application;

[0022] Figure 2 This is a structural diagram of a part of an embodiment, mainly showing the structure of the handle;

[0023] Figure 3 yes Figure 2 The enlarged view of part A mainly shows the structure of the motor and the first sun gear;

[0024] Figure 4 This is an exploded view as part of an embodiment, mainly showing the structure of the gear ring and the first planetary gear;

[0025] Figure 5 This is a structural schematic diagram as part of an embodiment, mainly showing the structure of the first pawl and the second pawl;

[0026] Figure 6 This is a structural schematic diagram of a part of an embodiment, mainly showing the structure of the gear plate and the first mounting groove;

[0027] Figure 7 This is a structural schematic diagram as part of an embodiment, mainly showing the structure of the wrench head and the receiving cavity.

[0028] Figure label:

[0029] 100. Electric ratchet wrench; 101. Handle; 102. Connecting rod; 103. Wrench head; 103a. Receiving groove; 104. Drive shaft; 105. Ratchet; 105a. Hexagonal groove; 106. First gear; 107. Gear plate; 107a. First mounting groove; 108. First pawl; 109. First torsion spring; 110. Second pawl; 112. Second torsion spring; 113. Motor; 114. First sun gear; 115. First mounting plate; 116. First planetary gear; 117. Gear ring; 118. Second sun gear; 119. Second mounting plate; 120. Second planetary gear. Detailed Implementation

[0030] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0031] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0032] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0033] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0034] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Reference Figure 1-7 An electric ratchet wrench 100 includes: a handle 101, a connecting rod 102, a wrench head 103, a drive shaft 104, a drive component for driving the drive shaft 104, a ratchet 105, a first drive component for driving the ratchet 105 to rotate, and a second drive component for driving the ratchet 105 to rotate. The connecting rod 102 is fixedly connected to the handle 101. The wrench head 103 is fixedly connected to the connecting rod 102. The wrench head 103 has a block structure. The drive shaft 104 is rotatably connected to the connecting rod 102. The ratchet 105 is rotatably connected to the connecting rod 102. When the first drive component drives the ratchet 105 to rotate, the second drive component slips on the ratchet 105; when the second drive component drives the ratchet 105 to rotate, the first drive component slips on the ratchet 105. The ratchet 105 has a hexagonal groove 105a, which is consistent with the shape of a screw nut.

[0036] A first transmission component is mounted on the transmission shaft 104 and is used to drive the rotation of the ratchet 105. The first transmission component includes: a first gear 106, a gear disc 107, a first pawl 108, and a first torsion spring 109. The first gear 106 is fixedly connected to the transmission shaft 104. The gear disc 107 is rotatably connected to the wrench head 103 and meshes with the first gear 106. The first pawl 108 is mounted on the gear disc 107. The two ends of the first torsion spring 109 are fixedly connected to the gear disc 107 and the first pawl 108, respectively. The gear disc 107 includes a first mounting groove 107a, and the first pawl 108 is located in the first mounting groove 107a. The hexagonal groove 105a of the ratchet 105 is fitted onto the nut of the screw. Then, the driving component drives the transmission shaft 104 to rotate. The rotation of the transmission shaft 104 drives the first gear 106 to rotate. The rotation of the first gear 106 drives the gear disc 107 to rotate. The rotation of the gear disc 107 drives the first pawl 108 to move. The movement of the first pawl 108 drives the ratchet 105 to rotate. The rotation of the ratchet 105 drives the screw to rotate, thereby tightening the screw.

[0037] A second transmission component is mounted on the wrench head 103 and is used to drive the ratchet 105 to rotate. The second transmission component includes a second pawl 110 and a second torsion spring 112. The second pawl 110 is mounted on the wrench head 103. The two ends of the second torsion spring 112 are fixedly connected to the second pawl 110 and the wrench head 103, respectively. The wrench head 103 includes a receiving groove 103a, and the second torsion spring 112 is located in the receiving groove 103a. When the handle 101 is manually turned, the handle 101 rotates, causing the wrench head 103 to rotate. The rotation of the wrench head 103 causes the second pawl 110 to move, which in turn causes the ratchet 105 to rotate. The rotation of the ratchet 105 causes the screw to rotate, thereby tightening the screw.

[0038] A drive unit is mounted on the handle 101 and is used to drive the rotation of the transmission shaft 104. The drive unit includes: a motor 113, a first sun gear 114, a first mounting plate 115, a first planetary gear 116, a gear ring 117, a second sun gear 118, and a second mounting plate 119. The motor 113 is located inside the handle 101 and is fixedly connected to the handle 101. A battery is provided on one side of the motor 113, and the battery is electrically connected to the motor 113. The first sun gear 114 is fixedly connected to the output shaft of the motor 113. The first mounting plate 115 is located on one side of the first sun gear 114. The first planetary gear 116 is rotatably connected to the first mounting plate 115 and meshes with the first sun gear 114. Multiple first planetary gears 116 are provided and are equidistantly distributed around the circumference of the first sun gear 114.

[0039] The gear ring 117 is fixedly connected to the handle 101, and its inner side meshes with the first planetary gear 116. The second sun gear 118 is fixedly connected to the first mounting plate 115. The inner side of the second planetary gear 120 meshes with the second sun gear 118, and its outer ring meshes with the gear ring 117. Multiple second planetary gears 120 are provided, equidistantly distributed around the circumference of the second sun gear 118. The first planetary gear 116 is located at one end of the first mounting plate 115, and the second planetary gear 120 is located at the other end of the first mounting plate 115.

[0040] The second mounting plate 119 is rotatably connected to the handle 101. The second mounting plate 119 is located at one end of the drive shaft 104 and is fixedly connected to the drive shaft 104. The second planetary gear 120 is rotatably connected to the second mounting plate 119. The motor 113 is powered by a battery and drives the first sun gear 114 to rotate. The inner side of the first planetary gear 116 meshes with the first sun gear 114, and the outer side meshes with the gear ring 117. Therefore, the rotation of the first sun gear 114 will drive the first planetary gear 116 to move around the first sun gear 114 while rotating on its own axis, thereby driving the first mounting plate 115 to rotate. The rotation of the first mounting plate 115 will drive the second sun gear 118 to rotate. The rotation of the second sun gear 118 will drive the second planetary gear 120 to move around the second sun gear 118 while rotating on its own axis. The circumferential movement of the second planetary gear 120 will drive the second mounting plate 119 to rotate. The rotation of the second mounting plate 119 will drive the drive shaft 104 to rotate, thereby driving the drive component to rotate.

[0041] Working process: Motor 113 is powered by a battery and drives the first sun gear 114 to rotate. The inner side of the first planetary gear 116 meshes with the first sun gear 114, and the outer side meshes with the gear ring 117. Therefore, the rotation of the first sun gear 114 will drive the first planetary gear 116 to rotate around the first sun gear 114 while rotating on its own axis. This will drive the first mounting plate 115 to rotate. The rotation of the first mounting plate 115 will drive the second sun gear 118 to rotate. The rotation of the second sun gear 118 will drive the second planetary gear 120 to rotate around the second sun gear 118. While moving, the second planetary gear 120 rotates, causing the second mounting plate 119 to rotate. The rotation of the second mounting plate 119 causes the drive shaft 104 to rotate, which in turn causes the first gear 106 to rotate. The rotation of the first gear 106 causes the gear disc 107 to rotate, which in turn causes the first pawl 108 to move (when the first pawl 108 drives the ratchet 105 to rotate, the second pawl 110 will slip against the ratchet 105). The movement of the first pawl 108 causes the ratchet 105 to rotate, which in turn causes the screw to rotate, thereby tightening the screw.

[0042] When manual tightening is required, manually turn the handle 101. The rotation of the handle 101 causes the wrench head 103 to rotate, which in turn causes the second pawl 110 to move. The movement of the second pawl 110 causes the ratchet 105 to rotate (when the second pawl 110 causes the ratchet 105 to rotate, the first pawl 108 will slip with the ratchet 105). The rotation of the ratchet 105 causes the screw to rotate, thereby tightening the screw. When the handle 101 is turned in the opposite direction, the second pawl 110 will slip with the ratchet 105, thus preventing the ratchet from rotating. It can be used both electric and manual, preventing the inability to continue operation when the battery is dead.

[0043] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. An electric ratchet wrench, comprising: A handle, a connecting rod, and a wrench head; the connecting rod is fixedly connected to the handle; the wrench head is fixedly connected to the connecting rod. Its features are: The electric ratchet wrench also includes: The drive shaft is rotatably connected to the connecting rod; The drive unit, mounted on the handle, is used to drive the rotation of the drive shaft; The ratchet is rotatably connected to the connecting rod; The first transmission component, mounted on the transmission shaft, is used to drive the ratchet to rotate; The second transmission component is mounted on the wrench head and is used to drive the ratchet to rotate; Specifically, when the first transmission component drives the ratchet to rotate, the second transmission component slips off the ratchet; when the second transmission component drives the ratchet to rotate, the first transmission component slips off the ratchet.

2. The electric ratchet wrench according to claim 1, characterized in that: The first transmission component includes: The first gear is fixedly connected to the drive shaft; The gear plate is rotatably connected to the wrench head and meshes with the first gear; The first pawl is mounted on the toothed disc; The first torsion spring is fixedly connected at both ends to the toothed disc and the first ratchet, respectively.

3. The electric ratchet wrench according to claim 2, characterized in that: The gear disc includes a first mounting groove; The first pawl is located in the first mounting slot.

4. The electric ratchet wrench according to claim 1, characterized in that: The second transmission component includes: The second pawl is installed on the wrench head; The second torsion spring is fixedly connected at both ends to the second pawl and the wrench head, respectively.

5. The electric ratchet wrench according to claim 4, characterized in that: The wrench head includes a receiving groove; The second torsion spring is located in the receiving groove.

6. The electric ratchet wrench according to claim 1, characterized in that: The driving component includes: The motor is located inside the handle and is fixedly connected to the handle; The first sun gear is fixedly connected to the output shaft of the motor; The first mounting plate is located on one side of the first sun gear; The first planetary gear is rotatably connected to the first mounting plate and meshes with the first sun gear; The gear ring is fixedly connected to the handle, and its inner side is engaged with the first planetary gear. The second sun gear is fixedly connected to the first mounting plate; The second planetary gear is configured to mesh with the second sun gear on its inner side, and its outer ring is configured to mesh with the gear ring. The second mounting plate is rotatably connected to the handle. The second planetary gear is rotatably connected to the second mounting plate.

7. The electric ratchet wrench according to claim 6, characterized in that: The first planetary gear has multiple components, which are equidistantly distributed around the circumference of the first sun gear.

8. The electric ratchet wrench according to claim 7, characterized in that: The second planetary gear has multiple components, which are equidistantly distributed around the circumference of the second sun gear.

9. The electric ratchet wrench according to claim 8, characterized in that: The first planetary gear is located at one end of the first mounting plate; The second planetary gear is located at the other end of the first mounting plate.

10. The electric ratchet wrench according to claim 9, characterized in that: The second mounting plate is located at one end of the drive shaft and is fixedly connected to the drive shaft.

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