A screwdriver

Abstract

The utility model provides a screw driver relates to mechanical tool field, it includes box, twist handle, batch head and transmission gear group, twist handle rotatory installation in one side of box, batch head rotatory installation in the other side of box, transmission gear group is installed in the box, transmission gear group is used for transmitting the moment of force on twist handle to batch head, the box wall of box is provided with addition hole, one end of addition hole is connected with the outside wall of box and goes out, the other end is connected into the box and corresponds each gear position in transmission gear group, one end of addition hole is provided with the obturator that goes out the outside wall of box. The utility model has the effect that it is convenient to add lubricant.

Description

Technical Field

[0001] This utility model relates to the field of mechanical tool technology, and more specifically, to a screwdriver. Background Technology

[0002] Screwdrivers are a common and practical hand tool. They are simple in design yet versatile in function. They usually consist of two parts: a handle and a metal cutting head. The handle is easy to grip and apply force, while the cutting head is designed with the corresponding shape according to different screw types (such as slotted, Phillips, and hexagonal). Screwdrivers are used to tighten or loosen screws by rotating or prying. They are widely used in daily and industrial scenarios such as home appliance repair, furniture assembly, and machinery manufacturing, and are an indispensable and powerful assistant in people's lives.

[0003] Existing examples, such as the gear-accelerated screwdriver disclosed in application number CN201520896060.6, mainly consist of an upper handle, a lower handle, a toothed steel wheel, a steel shell, a gear set, and a screwdriver head. Specifically: the gear set is installed in the steel shell and contains four gears. Gear I meshes with Gear II, with a transmission ratio of 2:1 between them; Gear III meshes with Gear IV, with a transmission ratio of 2:1 between them; Gear II and Gear III are coaxially rigidly connected, resulting in a gear set transmission ratio of 4:1. The toothed steel wheel is fixedly connected to the shaft of Gear I; the screwdriver head is fixedly connected to the shaft of Gear IV. Both the upper and lower handles are made of hard plastic. The upper handle is fixed to the toothed steel wheel, leaving a gap between it and the steel shell, and can rotate around the steel shell; the lower handle is fixed to the steel shell.

[0004] After a period of use, the tooth surfaces of the aforementioned screwdrivers will generate friction and heat, which can damage the gears. Therefore, the steel casing needs to be opened before lubricant can be added, making the maintenance process complicated. Utility Model Content

[0005] Therefore, in order to solve the problem of the complicated operation of adding lubricant, this utility model provides a screwdriver, the specific technical solution of which is as follows:

[0006] A screwdriver includes a housing, a turning handle, a bit, and a transmission gear set. The turning handle is rotatably mounted on one side of the housing, and the bit is rotatably mounted on the other side of the housing. The transmission gear set is installed inside the housing and is used to transmit torque from the turning handle to the bit. The housing wall has an addition hole, one end of which communicates with the outer side wall of the housing, and the other end which communicates with the inside of the housing and corresponds to the position of each gear in the transmission gear set. A plug is provided at the end of the addition hole that communicates with the outer side wall of the housing.

[0007] By adopting the above technical solution, after a period of use, first remove the blockage part, open the addition hole, and then add lubricating oil through the addition hole. The lubricating oil flows through the guide of the addition hole to the position of each gear in the transmission gear set. While adding, rotate the handle to ensure that the lubricating oil is fully added to each gear position. The above process can be completed without opening the box to add lubricant, which is convenient and efficient.

[0008] Furthermore, the added hole includes an input hole and several branch holes. The input hole is opened on the outer wall of the housing. One end of each branch hole is connected to the input hole and the other end is connected to the inside of the housing. The end of each branch hole away from the input hole corresponds to the position of each gear in the transmission gear set.

[0009] Furthermore, the input hole extends toward the thickness of the box wall, and the support holes are all inclinedly extended from the input hole toward the inside of the box.

[0010] Furthermore, the blocking component includes a locking block and a blocking block. The blocking block is installed on one side of the locking block, and the cross-sectional area of ​​the locking block is larger than that of the blocking block. A locking groove is provided circumferentially at one end of the input hole away from the branch hole. The blocking block is inserted into the input hole, and the locking block is locked into the locking groove.

[0011] Furthermore, the groove wall of the locking slot is provided with a snap-fit ​​groove.

[0012] Furthermore, the transmission gear set includes an input shaft, an output shaft, a transmission shaft, an input gear, an output gear, a first transmission gear, and a second transmission gear. The input shaft is rotatably mounted on the housing and fixedly connected to the turning handle. The output shaft is rotatably mounted on the housing and fixedly connected to the bit. The input gear is sleeved on the input shaft, and the output gear is sleeved on the output shaft. The transmission shaft is rotatably mounted in the housing. Both the input gear and the output gear are sleeved on the transmission shaft. The first transmission gear meshes with the input gear, and the second transmission gear meshes with the output gear. The transmission ratio between the input gear and the first transmission gear is 2:1, and the transmission ratio between the second transmission gear and the output gear is 2:1.

[0013] Furthermore, the axes of the input shaft and the output shaft coincide, and the input shaft and the output shaft are connected by bearings.

[0014] Furthermore, one end of the output shaft extends out of the housing, and the end of the output shaft extending out of the housing has a polygonal cross-section insertion groove. The bit is inserted into the insertion groove, and the bit and the groove wall are magnetically attracted to each other.

[0015] Furthermore, the housing includes an upper shell and a lower shell, the upper shell and the lower shell abutting each other, the upper shell and the lower shell being detachably connected, and the transmission gear set being installed between the upper shell and the lower shell.

[0016] Furthermore, both ends of the upper shell and both ends of the lower shell are provided with connecting wings. The two connecting wings of the upper shell and the two connecting wings of the lower shell correspond one-to-one, and the corresponding two connecting wings are fixedly connected by bolts. Attached Figure Description

[0017] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale; rather, the focus is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0018] Figure 1 This is a front view of the overall structure of an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of the added hole setting structure according to an embodiment of the present invention;

[0021] Figure 4 This is a side view of the overall structure of an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Housing; 11. Adding hole; 111. Input hole; 112. Support hole; 113. Locking slot; 114. Snap-in slot; 12. Blocking component; 121. Locking block; 122. Blocking block; 13. Upper shell; 14. Lower shell; 15. Connecting wing; 2. Tightening handle; 3. Bit; 4. Transmission gear set; 41. Input shaft; 42. Output shaft; 421. Insertion slot; 43. Transmission shaft; 44. Input gear; 45. Output gear; 46. First transmission gear; 47. Second transmission gear. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0028] like Figure 1 and Figure 2 As shown, a screwdriver according to one embodiment of the present invention includes a housing 1, a screwdriver handle 2, a screwdriver bit 3, and a transmission gear set 4. The screwdriver handle 2 is rotatably mounted on one side of the housing 1, and the screwdriver bit 3 is rotatably mounted on the other side of the housing 1. The transmission gear set 4 is installed inside the housing 1 and is used to transmit the torque on the screwdriver handle 2 to the screwdriver bit 3. The housing 1 has an addition hole 11 on its wall. One end of the addition hole 11 is connected to the outside of the outer wall of the housing 1, and the other end is connected to the inside of the housing 1 and corresponds to the position of each gear in the transmission gear set 4. A plug 12 is provided at the end of the addition hole 11 that is connected to the outside of the outer wall of the housing 1.

[0029] After a period of use, first remove the blockage part 12, open the addition hole 11, and then add lubricating oil through the addition hole 11. The lubricating oil flows through the guide of the addition hole 11 to the position of each gear in the transmission gear set 4. While adding, rotate the handle 2 to ensure that the lubricating oil is fully added to each gear position. The operation is convenient.

[0030] Furthermore, such as Figure 1 and Figure 3As shown, the adding hole 11 includes an input hole 111 and several branch holes 112. The input hole 111 is opened on the outer wall of the housing 1 and extends in the direction of the thickness of the housing wall 1. One end of the branch hole 112 is connected to the input hole 111 and the other end is connected to the inside of the housing 1. The end of each branch hole 112 away from the input hole 111 corresponds to the position of each gear in the transmission gear set 4. The branch holes 112 are all inclined and extended from the input hole 111 in the direction of the inside of the housing 1, so that the lubricating oil flows more smoothly in the branch hole 112. Lubricating oil only needs to be added from the input hole 111, and then the lubricating oil can flow to each gear.

[0031] All plugging components 12 are made of rubber. The plugging component 12 includes a locking block 121 and a plugging block 122. The plugging block 122 is installed in the middle of one side of the locking block 121. The cross-sectional area of ​​the locking block 121 is larger than that of the plugging block 122. A locking groove 113 is provided circumferentially at the end of the input hole 111 away from the branch hole 112. The plugging block 122 is inserted into the input hole 111, and the locking block 121 is locked into the locking groove 113, thereby blocking the addition hole 11. A retaining groove 114 is provided on the groove wall of the locking groove 113, so that the plugging component 12 can be easily removed.

[0032] like Figure 1 and Figure 2 As shown, the transmission gear set 4 includes an input shaft 41, an output shaft 42, a transmission shaft 43, an input gear 44, an output gear 45, a first transmission gear 46, and a second transmission gear 47. The input shaft 41 is rotatably mounted on the housing 1 via bearings and is fixedly connected to the screwdriver handle 2. The output shaft 42 is rotatably mounted on the housing 1 and is fixedly connected to the screwdriver bit 3. The input gear 44 is sleeved on the input shaft 41, and the output gear 45 is sleeved on the output shaft 42. The transmission shaft 43 is rotatably mounted inside the housing 1 via bearings. Both the input gear 44 and the output gear 45 are sleeved on the transmission shaft 43. The first transmission gear 46 meshes with the input gear 44, and the second transmission gear 47 meshes with the output gear 45. The transmission ratio between the input gear 44 and the first transmission gear 46 is 2:1, and the transmission ratio between the second transmission gear 47 and the output gear 45 is 2:1, resulting in a total transmission ratio of 4:1, which makes screwing easier.

[0033] Furthermore, the axes of the input shaft 41 and the output shaft 42 coincide, and the input shaft 41 and the output shaft 42 are connected by bearings, thereby avoiding eccentricity and increasing the torsional stress on the wrist.

[0034] One end of the output shaft 42 extends out of the housing 1. The end of the output shaft 42 extending out of the housing 1 is provided with a polygonal insertion groove 421. In this embodiment, the insertion groove 421 has a pentagonal cross-section. The bit 3 is inserted into the insertion groove 421. The bit 3 and the groove wall of the insertion groove 421 are magnetically attracted to each other. That is, a magnet is provided in the insertion groove 421. The bit 3 is made of metal. This can stabilize the bit 3 in the insertion groove 421 and facilitate the replacement of the bit 3.

[0035] like Figure 2 and Figure 4 As shown, the housing 1 includes an upper shell 13 and a lower shell 14, which abut against each other and are detachably connected. A transmission gear set 4 is installed between the upper shell 13 and the lower shell 14, so that the upper shell 13 can be removed from the lower shell 14 for maintenance of the transmission gear set 4. Furthermore, both ends of the upper shell 13 and both ends of the lower shell 14 are provided with connecting wings 15. The two connecting wings 15 of the upper shell 13 and the two connecting wings 15 of the lower shell 14 correspond one-to-one, and the corresponding two connecting wings 15 are fixedly connected by bolts, thereby achieving a detachable connection between the upper shell 13 and the lower shell 14.

[0036] The implementation principle of a screwdriver according to an embodiment of this application is as follows: after a period of use, the blockage 12 is first removed through the slot 114, and then lubricating oil is added from the input hole 111. The lubricating oil flows through the guide holes 112 to the position of each gear in the transmission gear set 4. While adding the lubricating oil, the handle 2 is rotated to ensure that the lubricating oil is fully added to the position of each gear.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A screwdriver, characterized in that, The device includes a housing, a screwdriver handle, a screwdriver bit, and a transmission gear set. The screwdriver handle is rotatably mounted on one side of the housing, and the screwdriver bit is rotatably mounted on the other side of the housing. The transmission gear set is installed inside the housing and is used to transmit the torque on the screwdriver handle to the screwdriver bit. The housing wall has an addition hole, one end of which communicates with the outer side wall of the housing, and the other end of which communicates with the inside of the housing and corresponds to the position of each gear in the transmission gear set. A plug is provided at the end of the addition hole that communicates with the outer side wall of the housing.

2. A screwdriver according to claim 1, characterized in that, The added hole includes an input hole and several branch holes. The input hole is opened on the outer wall of the housing. One end of each branch hole is connected to the input hole and the other end is connected to the inside of the housing. The end of each branch hole away from the input hole corresponds to the position of each gear in the transmission gear set.

3. A screwdriver according to claim 2, characterized in that, The input hole extends toward the thickness of the box wall, and the support holes are all inclinedly extended from the input hole toward the inside of the box.

4. A screwdriver according to claim 2, characterized in that, The blocking component includes a positioning block and a blocking block. The blocking block is installed on one side of the positioning block, and the cross-sectional area of ​​the positioning block is larger than that of the blocking block. A positioning groove is provided circumferentially at the end of the input hole away from the branch hole. The blocking block is inserted into the input hole, and the positioning block is engaged in the positioning groove.

5. A screwdriver according to claim 4, characterized in that, The slot wall of the card slot has a buckle groove.

6. A screwdriver according to claim 1, characterized in that, The transmission gear set includes an input shaft, an output shaft, a transmission shaft, an input gear, an output gear, a first transmission gear, and a second transmission gear. The input shaft is rotatably mounted on the housing and fixedly connected to the screwdriver handle. The output shaft is rotatably mounted on the housing and fixedly connected to the screwdriver bit. The input gear is sleeved on the input shaft, and the output gear is sleeved on the output shaft. The transmission shaft is rotatably mounted inside the housing. Both the input gear and the output gear are sleeved on the transmission shaft. The first transmission gear meshes with the input gear, and the second transmission gear meshes with the output gear. The transmission ratio between the input gear and the first transmission gear is 2:1, and the transmission ratio between the second transmission gear and the output gear is 2:

1.

7. A screwdriver according to claim 6, characterized in that, The axes of the input shaft and the output shaft coincide, and the input shaft and the output shaft are connected by bearings.

8. A screwdriver according to claim 6, characterized in that, One end of the output shaft extends out of the housing, and a polygonal insertion slot is provided at the end of the output shaft extending out of the housing. The bit is inserted into the insertion slot, and the bit and the wall of the insertion slot are magnetically engaged.

9. A screwdriver according to claim 1, characterized in that, The housing includes an upper shell and a lower shell, which abut against each other and are detachably connected. The transmission gear set is installed between the upper shell and the lower shell.

10. A screwdriver according to claim 9, characterized in that, Both ends of the upper shell and both ends of the lower shell are provided with connecting wings. The two connecting wings of the upper shell and the two connecting wings of the lower shell correspond one-to-one, and the corresponding two connecting wings are fixedly connected by bolts.

Images