Screwdriver speed regulating device

Abstract

The utility model discloses a screwdriver speed regulating device which comprises a first rotating part, a planetary gear speed changing assembly is arranged in the first rotating part, the planetary gear speed changing assembly comprises an output shaft, a gear ring and a plurality of planetary gear shafts, and the planetary gear shafts are meshed with the output shaft and the gear ring respectively. One end of the output shaft is provided with a cutter connecting sleeve, the cutter connecting sleeve is in elastic meshing connection with the first rotating part by taking the output shaft as the axial direction, the other end of the output shaft is provided with a second rotating part, and the second rotating part is in elastic meshing connection with the first rotating part by taking the output shaft as the axial direction. The first rotating part, the cutter connecting sleeve and the second rotating part are in elastic meshing connection, and the output shaft can rotate at different rotating speeds by adjusting torque, so that the efficiency can be improved when a small screw with a large number of teeth is tightened and disassembled, and meanwhile, the efficiency is improved. And the device is also suitable for occasions where the screw needs to be screwed and disassembled forcibly.

Description

Technical Field

[0001] The utility model relates to the field of speed regulating devices, in particular to a screwdriver speed regulating device. Background Art

[0002] A screwdriver is a common tool used to turn screws into place, usually with a thin, wedge-shaped head that fits into the slot or recess in the screw head.

[0003] Existing manual screwdrivers require many turns to tighten or remove screws with a large number of threads, which is very time-consuming and labor-intensive. Although there are electric screwdrivers, they are also limited by power supply. If there is no power supply or the battery is exhausted in the construction environment, they cannot be used. This also brings many inconveniences to the rotary screwdriver and cannot cope with the tightening or removal conditions of various screws. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a screwdriver speed regulation device, comprising a hollow first rotating part, a planetary gear speed change assembly is arranged in the first rotating part, the planetary gear speed change assembly includes an output shaft and a gear ring surrounding the outer periphery of the output shaft, a plurality of planetary gear shafts are arranged between the output shaft and the gear ring, the planetary gear shafts are respectively meshed with the output shaft and the gear ring, a tool connecting sleeve is provided at one end of the output shaft, the planetary gear shaft is sleeved and fixed inside the first rotating part, the tool connecting sleeve is elastically meshed with the first rotating part with the output shaft as the axial direction, a second rotating part is provided at the end of the output shaft away from the tool connecting sleeve, the second rotating part is elastically meshed with the first rotating part with the output shaft as the axial direction.

[0005] Furthermore, a first accommodating cavity is configured in the first rotating part, and the first accommodating cavity is used to accommodate the planetary gear transmission assembly. A first mounting portion is provided on one side of the first accommodating cavity, and a first axial hole for the output shaft to pass through is provided on the first mounting portion. A plurality of second axial holes are provided at preset intervals around the first axial hole, and the second axial holes are used to fix one end of the planetary gear shaft.

[0006] Furthermore, first gear areas are respectively provided on the circumferential end faces on both sides of the first rotating part, a second gear area that can mesh with the first gear area is provided on the end face of the tool connecting sleeve close to the first rotating part, and a third gear area that can mesh with the first gear area is provided on the end face of the second rotating part close to the first rotating part.

[0007] Furthermore, the second rotating portion is sleeved on the outer wall of the gear ring and can move along the axial direction of the gear ring.

[0008] Furthermore, a first spring is provided between the end surface of the gear ring and the second rotating part.

[0009] Furthermore, a plurality of grooves are provided on the outer wall of the gear ring, and a plurality of protrusions that cooperate with the grooves are provided on the inner wall of the second rotating part.

[0010] Furthermore, a gear rack is arranged inside the gear ring, and the gear rack includes a second accommodating cavity, which is used to accommodate the output shaft. A second mounting portion perpendicular to the outer wall of the second accommodating cavity is arranged outside the second accommodating cavity, and the other end of the planetary gear shaft is fixed on the second mounting portion.

[0011] Furthermore, the tool connecting sleeve includes a first connecting part, the output shaft is inserted into the first connecting part and fixedly connected to the first connecting part, the second gear area is arranged around the first connecting part, and a second connecting part for inserting a screwdriver head is arranged on the side of the tool connecting sleeve away from the first connecting part.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The present application is designed to add a planetary gear speed change assembly in the tool, and by setting a rotating first rotating part, a tool connecting sleeve and a second rotating part to perform elastic meshing connection, and by adjusting the torque, the output shaft can be rotated at different speeds, so that it can not only improve efficiency when tightening and disassembling small screws with a large number of threads, but also adapt to situations where screws need to be tightened and disassembled with force. In addition, when using this application, no large-scale operation is required, and it is convenient to use in a small space.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 This is an exploded view of the overall structure of the utility model;

[0017] Figure 2 This is a schematic structural diagram of the first rotating part of the present invention;

[0018] Figure 3 It is a side view of the first rotating part of the utility model;

[0019] Figure 4 This is an assembly diagram of the planetary gear speed change assembly and the second rotating part of the present utility model;

[0020] Figure 5 This is a schematic structural diagram of the gear rack of the present utility model;

[0021] Figure 6 This is a schematic structural diagram of the tool connecting sleeve of the present utility model;

[0022] Figure 7 It is a cross-sectional view of the overall structure of the utility model.

[0023] The reference numerals and names in the figures are as follows:

[0024] The first rotating part 100, the planetary gear transmission assembly 200, the output shaft 210, the gear ring 220, the planetary gear shaft 230, the tool connecting sleeve 300, the second rotating part 400, the first accommodating cavity 110, the first mounting part 120, the first axial hole 121, the second axial hole 122, the first gear area 130, the second gear area 310, the third gear area 410, the first spring 420, the groove 221, the protrusion 430, the gear rack 240, the second accommodating cavity 241, the second mounting part 242, the second spring 243, the first connecting part 320, and the second connecting part 330. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The present invention will be described in more detail. It should be understood that the specific embodiments described herein are intended only to explain the present invention and are not intended to limit the present invention. It should be noted that when an element is described as being "fixed to" another element, it may be directly on the other element, or one or more intervening elements may be present therebetween. When an element is described as being "connected to" another element, it may be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0027] In the description of the present invention, it should be noted that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. In the description of the present invention, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art in the art of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0030] The preferred embodiment of the present invention will be further described with reference to the accompanying drawings. Figure 1 and Figure 7 As shown, a screwdriver speed change device includes a hollow first rotating part, a planetary gear speed change assembly is arranged in the first rotating part, the planetary gear speed change assembly includes an output shaft and a gear ring surrounding the periphery of the output shaft, a plurality of planetary gear shafts are arranged between the output shaft and the gear ring, the planetary gear shafts are respectively meshed with the output shaft and the gear ring, the first rotating part is fixedly connected to the planetary gear shaft, one end of the output shaft is provided with a tool connecting sleeve, the tool connecting sleeve is used to plug in screwdriver heads of different specifications, the planetary gear shaft is sleeved and fixed inside the first rotating part, the tool connecting sleeve is elastically meshed with the first rotating part with the output shaft as the axial direction, the output shaft is provided with a second rotating part at the end away from the tool connecting sleeve, the second rotating part is elastically meshed with the first rotating part with the output shaft as the axial direction.

[0031] Under the above embodiment, the present application is divided into two usage scenarios. In the first case, when the first rotating part, the tool connecting sleeve and the second rotating part are not engaged with each other, the user rotates the first rotating part to force the planetary gear shaft to rotate around the output shaft, thereby driving the output shaft to rotate, and then driving the tool connecting sleeve and the screwdriver head to rotate. In this case, due to the different transmission ratios of the planetary gear shaft and the output shaft, the output shaft can be driven to rotate faster when the planetary gear shaft is forced to rotate around the output shaft. Therefore, the user can rotate the first rotating part slightly to make the screwdriver head rotate at a faster speed, thereby improving efficiency when tightening and disassembling small screws with a large number of threads. In the second case, when the first rotating part, the tool connecting sleeve and the second rotating part are engaged with each other, the first rotating part is connected to the tool connecting sleeve. When the user rotates the first rotating part, since the first rotating part and the tool connecting sleeve have the same transmission ratio, it is more suitable for occasions where the screws need to be tightened and disassembled with force.

[0032] From the above embodiments, it can be seen that the present application adds a planetary gear speed change assembly in the tool by design, and elastically engages the first rotating part, the tool connecting sleeve and the second rotating part by setting a rotating connection, so that the output shaft can rotate at different speeds, so that it can not only improve efficiency when tightening and disassembling small screws with a large number of threads, but also adapt to situations where the screws need to be tightened and disassembled with force. In addition, when using the present application, no large-scale operation is required, which is convenient for use in a small space.

[0033] On the basis of the above embodiment, Figure 2 and Figure 3 As shown, a first accommodating cavity is configured in the first rotating part, and the first accommodating cavity is used to accommodate the planetary gear transmission assembly. A first mounting portion is provided on one side of the first accommodating cavity, and a first axial hole for the output shaft to pass through is provided on the first mounting portion. A plurality of second axial holes are installed at preset intervals around the first axial hole, and the second axial holes are used to fix one end of the planetary gear shaft. Therefore, when the first accommodating cavity is rotated, the first accommodating cavity will drive the fixed planetary gear shaft to rotate synchronously, thereby driving the output shaft to rotate in the first axial hole.

[0034] On the basis of the above embodiment, Figure 1 and Figure 7As shown, first gear areas are respectively provided on the circumferential end faces on both sides of the first rotating part, a second gear area that can mesh with the first gear area is provided on the end face of the tool connecting sleeve close to the first rotating part, and a third gear area that can mesh with the first gear area is provided on the end face of the second rotating part close to the first rotating part. When the first gear area is separated from the second gear area and the third gear area, the rotation of the first rotating part does not interfere with the rotation of the tool connecting sleeve and the second rotating part. When the first gear area is meshed with the second gear area and the third gear area, the rotation of the first rotating part will drive the tool connecting sleeve and the second rotating part to rotate synchronously.

[0035] On the basis of the above embodiment, Figure 4 As shown, the second rotating part is sleeved on the outer wall of the gear ring and can move along the axial direction of the gear ring. When the second rotating part moves toward the first rotating part along the axial direction of the gear ring, the first gear area and the third gear area can engage with each other.

[0036] In some embodiments, combined Figure 4 and Figure 7 As shown, a first spring is provided between the end face of the gear ring and the second rotating part. When the user pushes the second rotating part to move along the axial direction of the gear ring toward the first rotating part, the first spring is compressed, and the first gear area and the third gear area can be engaged with each other. When the external force disappears, the second rotating part and the gear change are kept in a separated state under the action of the spring, thereby realizing an elastic meshing connection between the second rotating part and the first rotating part with the output shaft as the axial direction.

[0037] In some embodiments, as Figure 4 As shown, a plurality of grooves are provided on the outer wall of the gear ring, and a plurality of protrusions that cooperate with the grooves are provided on the inner wall of the second rotating part. When the second rotating part is sleeved on the outer wall of the gear ring, the protrusions are embedded in the grooves, thereby playing a guiding role when the second rotating part moves along the axial direction of the gear ring toward the first rotating part.

[0038] On the basis of the above embodiment, Figure 5 As shown, a gear rack is arranged in the gear ring, and the gear rack includes a second accommodating cavity, which is used to accommodate the output shaft. A second mounting portion perpendicular to the outer wall of the second accommodating cavity is arranged outside the second accommodating cavity, and the other end of the planetary gear shaft is fixed on the second mounting portion. A second spring is arranged between the output shaft and the second accommodating cavity, and the second spring is used to maintain the output shaft in a protruding state relative to the gear rack in a normal state.

[0039] On the basis of the above embodiment, Figure 6 and Figure 7 As shown, the tool connecting sleeve includes a first connecting part, the output shaft is inserted into the first connecting part and is fixedly connected to the first connecting part, the second gear area is arranged around the first connecting part, and a second connecting part for inserting a screwdriver head is provided on the side of the tool connecting sleeve away from the first connecting part. Under normal circumstances, since the second spring is used to maintain the ejection state of the output shaft on the gear frame, the tool connecting sleeve and the first rotating part remain in a separated state. When the user pushes the first rotating part toward the tool connecting sleeve along the axial direction of the output shaft, the second spring is compressed, and the first gear area and the second gear area are engaged with each other, thereby realizing an elastic meshing connection between the tool connecting sleeve and the first rotating part with the output shaft as the axial direction.

[0040] The above exemplary embodiments are detailed, and the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included within the present invention.

Claims

1. A screwdriver speed regulating device, characterized in that: The invention comprises a hollow first rotating part (100), a planetary gear transmission assembly (200) is arranged in the first rotating part (100), the planetary gear transmission assembly (200) comprises an output shaft (210) and a gear ring (220) surrounding the outer periphery of the output shaft (210), a plurality of planetary gear shafts (230) are arranged between the output shaft (210) and the gear ring (220), the planetary gear shafts (230) are respectively meshed with the output shaft (210) and the gear ring (220), and the output shaft (210) and the gear ring (220) are respectively meshed with each other. A tool connecting sleeve (300) is provided at one end of the output shaft (210), the planetary gear shaft (230) is sleeved and fixed inside the first rotating part (100), the tool connecting sleeve (300) and the first rotating part (100) are elastically meshed and connected with each other with the output shaft (210) as the axial direction, and a second rotating part (400) is provided at one end of the output shaft (210) away from the tool connecting sleeve (300), and the second rotating part (400) and the first rotating part (100) are elastically meshed and connected with each other with the output shaft (210) as the axial direction.

2. The screwdriver speed regulating device according to claim 1, characterized in that: A first accommodating cavity (110) is arranged in the first rotating portion (100), and the first accommodating cavity (110) is used to accommodate the planetary gear speed change assembly (200). A first mounting portion (120) is provided on one side of the first accommodating cavity (110), and a first axial hole (121) for the output shaft (210) to pass through is provided on the first mounting portion (120). A plurality of second axial holes (122) are provided around the first axial hole (121) at preset intervals, and the second axial holes (122) are used to fix one end of the planetary gear shaft (230).

3. The screwdriver speed regulating device according to claim 1, characterized in that: A first gear area (130) is respectively provided on the circumferential end surfaces on both sides of the first rotating part (100); a second gear area (310) that can mesh with the first gear area (130) is provided on the end surface of the tool connecting sleeve (300) close to the first rotating part (100); and a third gear area (410) that can mesh with the first gear area (130) is provided on the end surface of the second rotating part (400) close to the first rotating part (100).

4. The screwdriver speed regulating device according to claim 3, characterized in that: The second rotating part (400) is sleeved on the outer wall of the gear ring (220) and is movable along the axial direction of the gear ring (220).

5. The screwdriver speed regulating device according to claim 4, characterized in that: A first spring (420) is provided between the end surface of the gear ring (220) and the second rotating part (400).

6. The screwdriver speed regulating device according to claim 5, characterized in that: A plurality of grooves (221) are provided on the outer wall of the gear ring (220), and a plurality of protrusions (430) that cooperate with the grooves (221) are provided on the inner wall of the second rotating part (400).

7. The screwdriver speed regulating device according to claim 3, characterized in that: A gear rack (240) is arranged in the gear ring (220), and the gear rack (240) includes a second accommodating cavity (241), the second accommodating cavity (241) is used to accommodate the output shaft (210), and a second mounting portion (242) perpendicular to the outer wall of the second accommodating cavity (241) is arranged outside the second accommodating cavity (241), the other end of the planetary gear shaft (230) is fixed on the second mounting portion (242), and a second spring (243) is arranged between the output shaft (210) and the second accommodating cavity (241).

8. The screwdriver speed regulating device according to claim 7, characterized in that: The tool connecting sleeve (300) comprises a first connecting portion (320), the output shaft (210) is inserted into the first connecting portion (320) and is fixedly connected to the first connecting portion (320), the second gear region (310) is arranged around the first connecting portion (320), and a second connecting portion (330) for inserting a screwdriver head is arranged on a side of the tool connecting sleeve (300) away from the first connecting portion (320).

Images