An impact structure of an electric and pneumatic screwdriver

Abstract

The utility model discloses an impact structure of electric, pneumatic screwdriver, which comprises: an impact seat provided with a driving cavity and a cavity, the driving cavity and the cavity are independently arranged, the driving cavity is matched with a power source, the cavity is opened to a side away from the driving cavity, and the inner wall of the cavity is provided with a fixing rib; the impact block is accommodated in the cavity, the number of the impact block is at least two, the outer wall of the impact block is matched with the fixing rib, and the impact block is provided with a first through hole; a sealing cover is used for closing the opening of the cavity; an impact rod is matched with the top surface of the cavity through the sealing cover and the first through hole; the structure does not need to punch a hole on the impact seat, indirectly improves the sealing effect of the whole cavity, makes the whole impact structure be fully lubricated, and does not appear the phenomenon of being stuck due to lack of oil, and greatly improves the service life.

Description

Technical Field

[0001] This utility model relates to the field of tool technology, specifically to an impact structure for an electric or pneumatic screwdriver. Background Technology

[0002] Existing screwdrivers include pneumatic screwdrivers and electric screwdrivers. Both share a common impact structure, differing only in their drive source: electric screwdrivers use an electric motor, while pneumatic screwdrivers use a pneumatic motor. The impact structures in existing technologies vary. For example, Chinese utility model patent publication number "CN201613524U," entitled "A Pneumatic Screwdriver Pinless Strike Assembly," discloses a pinless strike assembly for a pneumatic screwdriver. It consists of an impact frame, impact blocks, a spline sleeve, a positioning sleeve, and an impact rod. The impact frame is barrel-shaped, with the spline sleeve placed at its bottom. The impact blocks are integrated with pins, and two impact blocks with pins at the top and bottom are placed inside the impact frame. A positioning sleeve is placed on the impact frame. One pin on one end of the impact block is inserted into a round hole at the bottom of the impact frame, and the other pin is inserted into an edge hole in the positioning sleeve. The impact rod enters the impact frame through the central round hole of the positioning sleeve, positioned between the two impact blocks, and contacts the spline sleeve.

[0003] However, in actual use, its striking structure is lubricated by solid grease. Under long-term and heavy-load continuous use, the solid grease cannot be effectively recycled and reused. Over time, the machine will soon jam due to lack of oil, resulting in a short service life and difficult maintenance. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is how to prevent lubricating oil leakage. An impact structure for an electric or pneumatic screwdriver includes: An impact seat is provided with a driving cavity and a cavity. The driving cavity and the cavity are independently arranged. The driving cavity is connected to a power source. The cavity opens towards the side away from the driving cavity. The inner wall of the cavity is provided with fixing ribs. An impact block is housed in the cavity, and the number of impact blocks is at least two. The outer wall of the impact block mates with the fixing rib, and the impact block is provided with a first through hole. A sealing cap that closes the opening of the cavity; An impact rod passes through the sealing cover, the first through hole, and engages with the top surface of the cavity.

[0005] It also includes an oil seal that mates with the sealing cap, and the impact rod extends through the oil seal into the cavity.

[0006] A sealing element is provided between the sealing cap and the inner wall of the cavity.

[0007] The sealing cap is threadedly connected to the inner wall of the cavity.

[0008] The sealing cap has a first annular groove on the side facing the cavity, and there is a gap between the bottom surface of the first annular groove and the adjacent impact block.

[0009] The top surface of the cavity is provided with a protrusion and a second annular groove. The second annular groove is located outside the protrusion. The protrusion is engaged with the top end of the impact rod. A gap is provided between the bottom surface of the second annular groove and the adjacent impact block.

[0010] The protrusion is provided with a positioning hole, and the top end of the impact rod extends to the positioning hole.

[0011] The outer wall of the impact block is provided with a first groove and a second groove. There are two fixing ribs. The first groove cooperates with one of the fixing ribs, and the other fixing rib slides in the second groove. The inner wall of the first through hole is provided with an impact part. The impact rod is provided with a protrusion that cooperates with the impact part.

[0012] The number of impact blocks is two, and the two impact blocks are stacked in opposite directions.

[0013] The technical solution of this utility model has the following advantages: 1. This utility model provides an impact structure for an electric or pneumatic screwdriver. In this structure, the cavity facing the drive chamber is closed, and the opening of the cavity is sealed by a sealing cap, forming a closed structure. The lubricating oil inside the cavity can be liquid or solid without leakage. Furthermore, the fixing ribs are located on the inner wall of the impact seat. Compared to the pin-type fixing in the prior art, this structure eliminates the need for drilling holes in the impact seat, indirectly improving the sealing effect of the entire cavity. This ensures sufficient lubrication of the entire impact structure, preventing jamming due to lack of oil and significantly extending its service life.

[0014] 2. The impact structure of the electric and pneumatic screwdriver provided by this utility model increases the sealing effect between the impact rod and the sealing cover by setting an oil seal.

[0015] 3. The impact structure of an electric or pneumatic screwdriver provided by this utility model enhances the sealing effect between the sealing cover and the inner wall of the cavity through the setting of a sealing element. The sealing element here can be an O-ring.

[0016] 4. The present invention provides an impact structure for an electric or pneumatic screwdriver, wherein the threaded connection improves the ease of fitting between the sealing cap and the impact seat.

[0017] 5. The impact structure of the electric and pneumatic screwdriver provided by this utility model has a first annular groove that creates an oil storage effect and increases the oil storage space.

[0018] 6. The impact structure of the electric and pneumatic screwdriver provided by this utility model also has the function of storing oil by setting the second annular groove, thereby increasing the oil storage space.

[0019] 7. The impact structure of the electric and pneumatic screwdriver provided by this utility model, during use, the impact seat rotates and drives the impact block to rotate. At this time, one end of the impact block is linked with the impact seat, and the other end of the impact block rotates relative to the fixed rib, forming a swinging effect. During the swinging process, the impact part cooperates with the protrusion to form the effect of driving the impact rod to rotate.

[0020] 8. The present invention provides an impact structure for an electric or pneumatic screwdriver, wherein two impact blocks cooperate with each other to continuously drive the impact rod to rotate, thereby achieving the effect of tightening or loosening bolts. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the impact structure of an electric or pneumatic screwdriver provided by this utility model; Figure 2 A cross-sectional view of the impact structure of an electric or pneumatic screwdriver provided by this utility model; Figure 3 A cross-sectional view of another form of the impact structure of an electric or pneumatic screwdriver provided by this utility model; Figure 4 A schematic diagram of the impact seat provided by this utility model; Figure 5 A schematic diagram of the impact block provided by this utility model.

[0023] Explanation of reference numerals in the attached figures: 11. Impact seat; 12. Impact block; 13. Sealing cover; 14. Impact rod; 15. Oil seal; 16. Sealing element; 111. Drive cavity; 112. Cavity; 113. Fixing rib; 114. Protrusion; 115. Second annular groove; 116. Positioning hole; 121. First through hole; 122. First groove; 123. Second groove; 124. Impact part; 131. Second through hole; 132. First annular groove; 141. Protrusion. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Example 1 This embodiment provides an impact structure for an electric or pneumatic screwdriver, as shown in the attached diagram. Figures 1-5 As shown, it includes: The impact seat 11 has a drive cavity 111 and a cavity 112, which are independently arranged. The drive cavity 111 cooperates with a power source, which can be pneumatically driven or electrically driven, and can be adjusted according to actual needs by those skilled in the art. Here, the drive cavity 111 and the cavity 112 are arranged vertically, with the drive cavity 111 located above and the cavity 112 located below. The cavity 112 opens towards the side away from the drive cavity 111, that is, it opens downwards. The inner wall of the cavity 112 is provided with fixing ribs 113.

[0029] Impact block 12 is housed in cavity 112. There are at least two impact blocks 12, and multiple impact blocks 12 are stacked in cavity 112. The outer wall of impact block 12 cooperates with fixing rib 113. Specifically, when impact seat 11 rotates, impact block 12 also moves. Impact block 12 is provided with a first through hole 121.

[0030] The sealing cap 13 closes the opening of the cavity 112, creating a seal. Whether it's solid or liquid lubricating oil inside the cavity 112, it can be sealed and secured to prevent leakage.

[0031] The impact rod 14 passes through the sealing cover 13 and the first through hole 121, engaging with the top surface of the cavity 112. Here, the upper end of the impact rod 14 extends through the sealing cover 13 and the first through hole 121 to engage with the top surface of the cavity 112, achieving the effect of rotation of the impact rod 14 relative to the impact seat 11. The lower end of the impact rod 14 engages with the head of the bolt. Specifically, the inner wall of the first through hole 121 engages with the impact rod 14 to achieve the rotation effect. It should be noted that the impact seat 11 drives the impact block 12 to move, and the impact block 12 drives the impact rod 14 to move, but the rotation speed of the impact seat 11 is different from the rotation speed of the impact rod 14.

[0032] With this structural design, the cavity 112 facing the drive cavity 111 is closed, and the opening of the cavity 112 is sealed by the sealing cover 13, making the cavity 112 a closed structure. The lubricating oil in the cavity 112 can be liquid or solid, and there will be no leakage. Secondly, the fixing rib 113 is set on the inner wall of the impact seat 11. Compared with the pin-type fixing in the prior art, this structure does not require drilling holes in the impact seat 11, which indirectly improves the sealing effect of the entire cavity 112, so that the entire impact structure is fully lubricated and will not be stuck due to lack of oil, greatly improving the service life.

[0033] Specifically, as shown in the attached document Figure 2As shown, it also includes an oil seal 15, which mates with the sealing cap 13. The sealing cap 13 has a second through hole 131, and the oil seal 15 mates with the second through hole 131. The impact rod 14 extends through the oil seal 15 into the cavity 112. The oil seal 15 enhances the sealing effect between the impact rod 14 and the sealing cap 13. Here, the oil seal 15 is a sealing material, which can be rubber or other materials. Alternatively, the sealing effect between the sealing cap 13 and the impact rod 14 can also be achieved through the structure on the sealing cap 13 alone.

[0034] Specifically, the cross-section of oil seal 15 is Y-shaped, which better achieves the sealing effect.

[0035] Specifically, as shown in the attached document Figure 2 As shown, a sealing element 16 is provided between the sealing cover 13 and the inner wall of the cavity 112. The sealing element 16 enhances the sealing effect between the sealing cover 13 and the inner wall of the cavity 112. The sealing element 16 can be an O-ring. Here, the material of the sealing cover 13 is the same as that of the impact seat 11, both being steel.

[0036] Specifically, the sealing cap 13 is threadedly connected to the inner wall of the cavity 112. This threaded connection improves the ease of mating between the sealing cap 13 and the impact seat 11. In other words, the inner wall of the cavity 112 has internal threads, and the portion of the sealing cap 13 embedded in the cavity 112 has external threads. The external threads mate with the internal threads to create a threaded fastening effect. The sealing element 16 is located below the external threads.

[0037] Specifically, as shown in the attached document Figure 2 As shown, the sealing cap 13 has a first annular groove 132 on the side facing the cavity 112, and there is a gap between the bottom surface of the first annular groove 132 and the adjacent impact block 12. The first annular groove 132 is provided to create an oil storage effect and increase the oil storage space. Here, the first annular groove 132 is located on the top surface of the sealing cap 13, that is, the top surface of the part of the sealing cap 13 embedded in the cavity 112.

[0038] Specifically, as shown in the attached document Figure 2 , Figure 5 As shown, the top surface of cavity 112 is provided with a protrusion 114 and a second annular groove 115. The second annular groove 115 is located outside the protrusion 114. The protrusion 114 mates with the top end of the impact rod 14. A gap is provided between the bottom surface of the second annular groove 115 and the adjacent impact block 12. The second annular groove 115 is also provided to store oil and increase the oil storage space.

[0039] Specifically, the protrusion 114 is provided with a positioning hole 116, and the top end of the impact rod 14 extends to the positioning hole 116. With the positioning hole 116 provided, the impact rod 14 can only rotate radially, creating the effect of the impact rod 14 rotating relative to the impact seat 11.

[0040] Specifically, as shown in the attached document Figures 3-4 As shown, the outer wall of the impact block 12 is provided with a first groove 122 and a second groove 123. There are two fixing ribs 113. The first groove 122 engages with one of the fixing ribs 113, while the other fixing rib 113 slides within the second groove 123. Here, the first groove 122 and the fixing rib 113 are a fitted structure, meaning the impact block 12 rotates around this fixing rib 113. The length of the second groove 123 is greater than the length of the first groove 122, allowing the other fixing rib 113 to slide within the second groove 123. During the rotation of the impact seat 11, the impact block 12 will create a wobbling effect. The inner wall of the first through hole 121 is provided with an impact portion 124. In this embodiment, the inner wall of the first through hole 121 is provided with two impact portions 124, which are symmetrically arranged. Here, the first through hole 121 is an irregularly shaped hole. The impact rod 14 is provided with a protrusion 141 that engages with the impact portion 124. During the swinging process of the impact block 12, the impact part 124 cooperates with the protrusion 141 to drive the impact rod 14 to rotate. In use, the impact seat 11 rotates, causing the impact block 12 to rotate. At this time, one end of the impact block 12 is linked with the impact seat 11, and the other end of the impact block 12 rotates relative to the fixed rib 113, forming a swinging effect. During the swinging process of the impact block 12, the impact part 124 cooperates with the protrusion 141 to drive the impact rod 14 to rotate.

[0041] Specifically, there are two impact blocks 12, which are stacked in opposite directions. In this embodiment, the impact blocks 12 have the same structure, but during installation, they are arranged in opposite directions. That is, the first groove 122 of the upper impact block 12 is above the second groove 123 of the lower impact block 12, and the second groove 123 of the upper impact block 12 is above the first groove 122 of the lower impact block 12, forming a misaligned arrangement. Correspondingly, the impact rod 14 has two protrusions 141, which are also misaligned and cooperate with the two impact blocks 12 respectively. The two impact blocks 12 cooperate with each other to continuously drive the impact rod 14 to rotate, ultimately achieving the effect of tightening or loosening the bolt.

[0042] Specifically, the top surface of the first annular groove 132 abuts against the impact block 12 located below, and the top surface of the second annular groove 115 abuts against the impact block 12 located above.

[0043] Specifically, the specific structure of the driving cavity 111 cooperates with the corresponding driving source, which is existing technology, so it will not be described in detail in this embodiment.

[0044] Specifically, this impact structure can be applied to both electric and pneumatic screwdrivers.

[0045] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An impact structure for an electric or pneumatic screwdriver, characterized in that, include: Impact seat (11), the impact seat (11) is provided with a drive cavity (111) and a cavity (112), the drive cavity (111) and the cavity (112) are independently arranged, the drive cavity (111) cooperates with the power source, the cavity (112) opens towards the side away from the drive cavity (111), and the inner wall of the cavity (112) is provided with fixing ribs (113); Impact block (12), the impact block (12) is housed in the cavity (112), the number of impact blocks (12) is at least two, the outer wall of the impact block (12) cooperates with the fixing rib (113), and the impact block (12) is provided with a first through hole (121); A sealing cap (13) that closes the opening of the cavity (112); Impact rod (14) passes through the sealing cover (13), the first through hole (121) and engages with the top surface of the cavity (112).

2. The impact structure of the electric / pneumatic screwdriver according to claim 1, characterized in that, It also includes an oil seal (15) that engages with the sealing cap (13), and the impact rod (14) extends through the oil seal (15) into the cavity (112).

3. The impact structure of the electric / pneumatic screwdriver according to claim 1, characterized in that, A sealing element (16) is provided between the sealing cap (13) and the inner wall of the cavity (112).

4. The impact structure of the electric / pneumatic screwdriver according to claim 1, characterized in that, The sealing cap (13) is threadedly connected to the inner wall of the cavity (112).

5. The impact structure of the electric / pneumatic screwdriver according to claim 1, characterized in that, The sealing cap (13) has a first annular groove (132) on the side facing the cavity (112), and there is a gap between the bottom surface of the first annular groove (132) and the adjacent impact block (12).

6. The impact structure of the electric / pneumatic screwdriver according to claim 1, characterized in that, The top surface of the cavity (112) is provided with a protrusion (114) and a second annular groove (115). The second annular groove (115) is located outside the protrusion (114). The protrusion (114) is engaged with the top end of the impact rod (14). A gap is provided between the bottom surface of the second annular groove (115) and the adjacent impact block (12).

7. The impact structure of the electric / pneumatic screwdriver according to claim 6, characterized in that, The protrusion (114) is provided with a positioning hole (116), and the top end of the impact rod (14) extends to the positioning hole (116).

8. The impact structure of the electric / pneumatic screwdriver according to claim 1, characterized in that, The outer wall of the impact block (12) is provided with a first groove (122) and a second groove (123). There are two fixing ribs (113). The first groove (122) cooperates with one of the fixing ribs (113), and the other fixing rib (113) slides in the second groove (123). The inner wall of the first through hole (121) is provided with an impact part (124). The impact rod (14) is provided with a protrusion (141) that cooperates with the impact part (124).

9. The impact structure of the electric / pneumatic screwdriver according to claim 8, characterized in that, The number of impact blocks (12) is two, and the two impact blocks (12) are stacked in opposite directions.

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