Electric ratchet bowl

Abstract

An electric ratchet wrench comprising a base body consisting of a handle, a connecting rod and a wrench head, wherein the connecting rod firmly connects the handle to the wrench head, characterized in that the electric ratchet wrench further comprises the following: a drive shaft which is articulated to the connecting rod, a drive mechanism which is attached to the handle for operating the drive shaft, a ratchet which is articulated to the connecting rod, a first drive element which is coupled to the drive shaft for operating the ratchet, a second drive gear, which is coupled to the key head to operate the ratchet, which causes the second drive lug to slip relative to the ratchet as long as the first drive lug operates the ratchet, and the first drive lug to slip relative to the ratchet as long as the second drive lug operates the ratchet.

Description

Technology area

[0001] The utility model relates to ratchet wrench technology, in particular to an electric ratchet wrench. Background technology

[0002] A ratchet wrench is a unidirectional rotary tool suitable for assembly and disassembly work, primarily used for tightening or loosening screws. It is therefore widespread, well-known, and commonplace. Various types of ratchet wrenches exist, such as manual and electric models. While a manual ratchet wrench offers the advantage of high torque, it has the disadvantage that both tightening and loosening must be performed manually. This not only requires considerable effort but also makes the tool cumbersome, as the screw can become stuck in the threaded hole when it is nearing the end of the loosening process, requiring manual removal.

[0003] Currently available electric ratchet wrenches, such as the automatic ratchet wrench according to Chinese patent CN 2706281, operate on the principle that an electric motor built into the housing drives the bevel gear and pinion, thus rotating the actuator (output head). While such electric ratchet wrenches are advantageous due to their ease of use and reduced effort, they have the disadvantage that they cannot operate when the battery is depleted, which significantly limits their usability.

[0004] The purpose of the utility model is therefore to provide an electric ratchet wrench that is suitable for both electric and manual operation. Content of the utility model

[0005] The embodiments are described in detail below with reference to the accompanying drawings and specific examples. These descriptions are not intended to identify the essential features of the claimed technical solutions, nor to limit the scope of the claimed technical solutions.

[0006] To solve the problem, an electric ratchet wrench is provided, comprising a body having a handle, a connecting rod, and a wrench head, the connecting rod firmly connecting the handle to the wrench head; a drive shaft articulated to the connecting rod; a drive element attached to the handle for operating the drive shaft; a ratchet articulated to the connecting rod; a first drive element coupled to the drive shaft for operating the ratchet; and a second drive element coupled to the wrench head for operating the ratchet. In such an arrangement, the second drive element will slip relative to the ratchet as long as the first drive element operates the ratchet, and the first drive element will slip relative to the ratchet as long as the second drive element operates the ratchet.

[0007] Motorized tightening of the screw is achieved by the drive element rotating the drive shaft, whereby the rotating drive shaft then drives the ratchet via the first drive element, thus tightening the screw. If manual tightening of the screw is required, the handle can be rotated, whereby the rotating handle drives the ratchet via the second drive element, thus tightening the screw manually. In this context, the ratchet wrench according to the invention can be used for both electric and manual operation.

[0008] It can further be designed such that the first driver comprises a first gear which is fixedly connected to the drive shaft, a toothed disc which is articulated to the key head and engages with the first gear, a first pawl which is mounted on the toothed disc, and a first torsion spring, both ends of which are fixedly connected to the toothed disc and the first pawl.

[0009] It can also be designed so that the toothed disc includes a first mounting groove in which the first pawl is installed.

[0010] It can also be designed such that the second driver has a second pawl attached to the key head and a second torsion spring, both ends of which are firmly connected to the second pawl and the key head.

[0011] It can also be designed so that the key head is formed with a receiving groove in which the second torsion spring is placed.

[0012] It can further be designed such that the drive element comprises an electric motor which is installed in the handle and is still firmly connected to the handle, a first sun gear which is firmly connected to the output shaft of the electric motor, a first mounting board which lies to the side of the first sun gear, a first planet gear which is articulated to the first mounting board and is in mesh with the first sun gear, a ring gear which is firmly connected to the handle and whose inner side is in mesh with the first planet gear, a second sun gear which is firmly connected to the first mounting board, a second planet gear which is in mesh with the second sun gear and whose outer side is in mesh with the ring gear, and a second mounting board which is articulated to the handle, wherein the second planet gear is articulated to the second mounting board.

[0013] It can also be designed in such a way that several first planetary gears are provided, which are arranged equidistantly around the first sun gear.

[0014] It can also be designed to include several second planetary gears, which are arranged equidistantly around the second sun gear.

[0015] It can also be designed such that the single first planet gear is mounted on one side of the first mounting board, and the single second planet gear is mounted on the other side of the first mounting board.

[0016] It can also be designed so that the second mounting board is firmly connected to one end of the drive shaft.

[0017] The utility model therefore represents an electric ratchet wrench that is suitable for both electric and manual operation. Illustration of the attached drawings

[0018] Further features, objectives, and advantages of the present utility model will become apparent from the following description with reference to the accompanying drawings. The accompanying drawings are used to illustrate the utility model and do not constitute a limitation on the scope of protection of the utility model.

[0019] Furthermore, identical or similar reference numerals in the drawings denote identical or similar elements. It should be noted that the accompanying drawings are schematic and therefore the components and elements are not necessarily to scale.

[0020] In the attached drawings: Fig. Figure 1 shows an overall view of the embodiment according to the invention; Fig. Figure 2 shows a view of the handle as part of the embodiment according to the invention; Fig. Figure 3 shows an enlarged view of part A, namely the electric motor and the first sun gear, relative to Fig. 2; Fig. Figure 4 shows an exploded view of the gear ring and the first planetary gear as part of the embodiment according to the invention; Fig. Figure 5 shows a view of the first pawl and the second pawl as part of the embodiment according to the invention; Fig. 6 shows a view of the toothed disc and the first mounting groove as part of the embodiment according to the invention; Fig. Figure 7 shows a view of the key head and the receiving groove as part of the embodiment according to the invention. Reference symbol list:

[0021] 100. Electric ratchet wrench, 101. Handle, 102. Connecting rod, 103. Wrench head, 103a. Mounting groove, 104. Drive shaft, 105. Ratchet, 105a. Hex keyway, 106. First gear, 107. Toothed washer, 107a. First mounting groove, 108. First pawl, 109. First torsion spring, 110. Second pawl, 112. Second torsion spring, 113. Electric motor, 114. First sun gear, 115. First mounting plate, 116. First planet gear, 117. Ring gear, 118. Second sun gear, 119. Second mounting plate, 120. Second planet gear. Specific embodiments

[0022] The embodiments of the invention are described in detail below with reference to the figures. Although certain embodiments of the invention are illustrated in the accompanying figures, it should be noted that such embodiments can be realized in various ways and are not limited to the exemplary embodiments described here. The description of the embodiments provides a more thorough understanding of the present utility model. It should be understood that the drawings and embodiments are only examples and do not constitute a limitation of the scope of protection of the utility model.

[0023] It should also be noted that, for the sake of simplicity, only certain parts relevant to the utility model are shown in the drawing. Unless there is an objection, certain features of the invention may be combined in the utility model.

[0024] It should be noted that the terms used here, such as "first" and "second", serve to distinguish between different devices, modules or units, and not to establish the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the use of terms like "one" and "several" is more illustrative than restrictive. Unless explicitly stated otherwise in the context, industry professionals should interpret it as "one or more".

[0026] The embodiments according to the invention are described in more detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0027] As from Fig. 1 to Fig.As can be seen in Figure 7, the electric ratchet wrench 100 according to the invention comprises a base body consisting of a handle 101, a connecting rod 102, and a wrench head 103, a drive shaft 104, a drive element for operating the drive shaft 104, a ratchet 105, a first drive element for operating the ratchet 105, and a second drive element for operating the ratchet 105. 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 is provided with a modular arrangement. The drive shaft 104 is articulated to the connecting rod 102. The ratchet 105 is articulated to the connecting rod 102. The second drive element can slide relative to the ratchet 105 as long as the first drive element operates the ratchet 105. The first drive unit can slip relative to the ratchet 105 as long as the second drive unit operates the ratchet 105.The ratchet 105 is designed with a hexagonal slot 105a which is adapted to the shape of a screw nut.

[0028] The first drive element is coupled to the drive shaft 104 for operating the ratchet 105 and comprises a first gear 106, a toothed disc 107, a first pawl 108, and a first torsion spring 109. The first gear 106 is fixedly connected to the drive shaft 104. The toothed disc 107 is articulated to the wrench head 103 and engages with the first gear 106. The first pawl 108 is mounted on the toothed disc 107. The two ends of the first torsion spring 109 are each fixedly connected to the toothed disc 107 and the first pawl 108, respectively. The toothed disc 107 has a first mounting groove 107a in which the first pawl 108 is installed. To tighten a screw using a motor, the ratchet 105 with the hexagonal slot 105a is placed against a nut. The drive shaft 104 is then operated by the drive mechanism.The rotating drive shaft 104 drives the first gear 106 and the connected toothed disc 107 to rotate, so that the first pawl 108 is moved and the ratchet 105 or then the clamped screw is taken along for rotation.

[0029] The second drive element is coupled to the wrench head 103 for operating the ratchet 105. The second drive element comprises 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 each fixedly connected to the second pawl 110 and the wrench head 103, respectively. The wrench head 103 has a receiving groove 103a in which the second torsion spring 112 is mounted. To manually tighten a screw, the handle 101 is turned manually, which rotates the wrench head 103, thus moving the second pawl 110 and turning the ratchet 105 and, consequently, the clamped screw.

[0030] The drive unit is attached to the handle 101 for operating the drive shaft 104. The drive unit comprises an electric motor 113, a first sun gear 114, a first mounting plate 115, a first planet gear 116, a ring gear 117, a second sun gear 118, and a second mounting plate 119. The electric motor 113 is integrated into the handle 101 or rigidly connected to it. An electrically connected battery is located on one side of the electric motor 113. The first sun gear 114 is rigidly connected to the output shaft of the electric motor 113. The first mounting plate 115 rests on one side of the first sun gear 114. The first planet gear 116 is articulated to the first mounting plate 115 and meshes with the first sun gear 114. Several first planetary gears 116 are provided, which are arranged equidistantly around the first sun gear 114.

[0031] The toothed ring 117 is fixedly connected to the handle 101 and meshes on its inner side with the first planetary gear 116. The second sun gear 118 is fixedly connected to the first mounting plate 115. The second planetary gear 120 meshes on its inner side with the second sun gear 118 and on its outer side with the toothed ring 117. Several second planetary gears 120 are provided, arranged equidistantly around the second sun gear 118. The single first planetary gear 116 is mounted on one side of the first mounting plate 115, while the single second planetary gear 120 is mounted on the other side of the first mounting plate 115.

[0032] The second mounting board 119 is articulated to the handle 101. The second mounting board 119 is rigidly connected to one end of the drive shaft 104. The second planet gear 120 is articulated to the second mounting board 119. The electric motor 113 is electrically powered by the battery to drive the first sun gear 114 to rotate. The first planet gear 116 engages with the first sun gear 114 on its inner side and with the toothed ring 117 on its outer side, so that when the first sun gear 114 rotates, it drives the first planet gear 116 along with it for simultaneous rotation around the first sun gear 114. In this process, the first mounting board 115, or then the second sun gear 118, is taken along for rotation, while the second planet gear 120 is taken along for simultaneous rotation during the movement around the second sun gear 118, so that the second mounting board 119, or then the drive shaft 104 and the drive element, are taken along for rotation.

[0033] Function: The electric motor 113 is powered by the battery and drives the first sun gear 114 to rotate. The first planet gear 116 engages with the first sun gear 114 on its inner side and with the toothed ring 117 on its outer side, so that when the first sun gear 114 rotates, it drives the first planet gear 116 along with it, causing it to rotate simultaneously around the first sun gear 114. This causes the first mounting plate 115, and subsequently the second sun gear 118, to rotate, while the second planet gear 120 is driven to rotate simultaneously around the second sun gear 118, causing the second mounting plate 119, and subsequently the drive shaft 104, to rotate. The drive shaft 104 engages the first gear 106, and subsequently the second planet gear 120, which in turn rotates around the second sun gear 118.then the toothed disc 107 is turned along with it, so that the first pawl 108 is also moved along with it (when the first pawl 108 takes the ratchet 105 along with it to turn, the second pawl 110 slips away relative to the ratchet 105), so that the first pawl 108 is moved and the ratchet 105 or then the clamped screw is taken along with it to turn.

[0034] To manually tighten a screw, the handle 101 is turned manually, which then engages the wrench head 103, causing the second pawl 110 to move and the ratchet 105 to rotate (when the second pawl 110 engages the ratchet 105, the first pawl 108 slips relative to the ratchet 105), thus turning and tightening the clamped screw. When the handle 101 is turned in the reverse direction, the second pawl 110 slips relative to the ratchet 105, so the ratchet is no longer engaged. This arrangement allows for both electric and manual operation and prevents the possibility of further operation being interrupted due to a depleted battery.

[0035] The foregoing description merely presents some preferred embodiments of the present utility model and an explanation of the underlying technical principles. It will be understood by those skilled in the art that the scope of the invention addressed in the embodiments of the present application is not limited to the technical solutions formed by specific combinations of the aforementioned technical features, but also includes other technical solutions formed by any combination of the aforementioned technical features or their equivalent features, provided that such combinations remain within the meaning and scope of the utility model. For example, the technical solution includes replacing the aforementioned features with technical features having similar functions, which are described (but not limited to) in the embodiments according to the invention.

[0036] The utility model relates to ratchet wrench technology, in particular to an electric ratchet wrench comprising a base body having a handle, a connecting rod, and a wrench head, wherein the connecting rod rigidly connects the handle to the wrench head, a drive shaft articulated to the connecting rod, a drive element attached to the handle for operating the drive shaft, a ratchet articulated to the connecting rod, a first drive element coupled to the drive shaft for operating the ratchet, and a second drive element coupled to the wrench head for operating the ratchet. In such an arrangement, the second drive element will slide relative to the ratchet as long as the first drive element operates the ratchet, and the first drive element will slide relative to the ratchet as long as the second drive element operates the ratchet.The utility model therefore represents an electric ratchet wrench that is suitable for both electric and manual operation. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 2706281

[0003]

Claims

[1] Electric ratchet wrench comprising a body consisting of a handle, a connecting rod and a wrench head, wherein the connecting rod firmly connects the handle to the wrench head, characterized by , that the electric ratchet wrench further features the following: a drive shaft which is articulated to the connecting rod, a drive mechanism which is attached to the handle for operating the drive shaft, a ratchet which is articulated to the connecting rod, a first drive element which is coupled to the drive shaft for operating the ratchet, a second drive gear, which is coupled to the key head to operate the ratchet, which causes the second drive lug to slip relative to the ratchet as long as the first drive lug operates the ratchet, and the first drive lug to slip relative to the ratchet as long as the second drive lug operates the ratchet. [2] Electric ratchet wrench according to claim 1, characterized by , that the first driver has the following characteristics: a first gear which is firmly connected to the drive shaft, a toothed disc which is articulated to the key head and engages with the first gear, a first pawl, which is mounted on the toothed disc, a first torsion spring, both ends of which are firmly connected to the toothed disc and the first pawl. [3] Electric ratchet wrench according to claim 2, characterized by that the toothed disc includes a first mounting groove in which the first pawl is installed. [4] Electric ratchet wrench according to claim 1, characterized by , that the second drive element has the following characteristics: a second locking pawl, which is attached to the key head, a second torsion spring, both ends of which are firmly connected to the second pawl and the key head. [5] Electric ratchet wrench according to claim 4, characterized by , that the key head is designed with a receiving groove in which the second torsion spring is placed. [6] Electric ratchet wrench according to claim 1, characterized by , that the drive mechanism has the following characteristics: an electric motor that is installed in the handle or permanently attached to it, a first sun gear, which is firmly connected to the output shaft of the electric motor, a first mounting board, which lies to the side of the first sun wheel, a first planetary gear which is articulated to the first mounting board and engages with the first sun gear, a toothed ring which is firmly connected to the handle and whose inner side engages with the first planetary gear, a second sun wheel, which is firmly connected to the first mounting board, a second planetary gear, the inside of which engages with the second sun gear and the outside of which engages with the toothed ring, a second mounting board, which is hinged to the handle, the second planetary gear is articulated to the second mounting board. [7] Electric ratchet wrench according to claim 6, characterized by that several first planetary gears are provided, which are arranged equidistantly around the first sun gear. [8] Electric ratchet wrench according to claim 7, characterized by that there are several second planetary gears provided, which are arranged equidistantly around the second sun gear. [9] Electric ratchet wrench according to claim 8, characterized by, that the single first planet gear is mounted on one side of the first mounting board, and the single second planet gear is mounted on the other side of the first mounting board. [10] Electric ratchet wrench according to claim 9, characterized by that the second mounting board is firmly connected to one end of the drive shaft.

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