A striking assembly fitting, a striking assembly and a percussion spoon

Abstract

The utility model discloses a kind of striking assembly fittings, striking assembly and impact opener, wherein, a kind of striking assembly fittings includes accessory body, the accessory body is T axle, the two end portions of the transverse portion of T axle are first lug, the upper side and the peripheral side of the first lug are respectively equipped with first leap plane and first abutment plane, the junction edge of the first abutment plane and the first leap plane is equipped with first transition curve surface. By the above structure, in the stress concentration key area (the junction edge of first abutment plane and first leap plane, that is, the contact leap position of first lug) of first lug, first transition curve surface is arranged, and the stress concentration effect of original edge can be effectively reduced. The structure enables impact load to be smoothly dispersed in contact leap process, greatly reduces local stress, so as to slow down the damage of first lug, so as to significantly prolong the service life of T axle and even striking assembly, impact opener.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a striking component accessory, a striking component, and an impact screwdriver. Background Technology

[0002] Impact screwdrivers, indispensable tools in modern assembly and repair, offer the advantage of converting continuous rotation into intermittent high-torque impacts through a striking assembly, thus overcoming the resistance of stubborn fasteners. This striking assembly includes a T-axis and a striking block, where the lateral lug of the T-axis and the lug of the striking block, fitted on the outside, form a transmission engagement. In actual operation, the impact screwdriver drives the striking block to rotate via a gear set. A compressed spring pushes the striking block, causing the lugs to contact and achieve synchronous rotation to output conventional torque. When the bit encounters high resistance, the T-axis stops rotating with the bit, while the striking block continues to rotate under the drive of the impact screwdriver, compressing the spring to store energy. Once the striking block lug passes the T-axis lug, the spring releases its stored energy, propelling the striking block forward at high speed. The striking block lug collides violently with the T-axis lug, converting the impact energy into high torque, which is then transmitted to the bit. This process repeats continuously, creating high-frequency impacts to complete tightening or disassembly operations.

[0003] However, the inventors discovered through long-term practical application that the impact components of existing impact screwdrivers have significant service life defects: during high-frequency impacts, the contact and overturning parts of the lug will generate extremely strong stress concentration. This stress concentration phenomenon causes the lug to be prone to wear, deformation, or even breakage. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a striking component accessory.

[0005] This utility model also proposes a strike assembly having the strike assembly accessory.

[0006] This invention further proposes an impact screwdriver having the impact component.

[0007] According to a first aspect of the present invention, a striking component accessory includes an accessory body, the accessory body being a T-axis, the two ends of the transverse portion of the T-axis being first lugs, the upper side and the peripheral side of the first lugs being respectively provided with a first overturning plane and a first abutting plane, and the intersection edge of the first abutting plane and the first overturning plane being provided with a first transition curved surface.

[0008] A striking component accessory according to an embodiment of the present utility model has at least the following beneficial effects: With the above structure, on the one hand, a first transition surface is set in the key stress concentration area of ​​the first lug (the intersection edge of the first abutting plane and the first overturning plane, i.e., the contact overturning part of the first lug), which can effectively reduce the stress concentration effect of the original edge. This structure allows the impact load to be smoothly dispersed during the contact overturning process, greatly reducing local stress, thereby slowing down the damage to the first lug and thus significantly extending the service life of the T-axis and even the impact assembly and impact screwdriver; on the other hand, the design of the first transition surface makes the movement trajectory of the impact block lug smoother when overturning the T-axis lug, which can reduce the vibration and noise generated in this process.

[0009] According to some embodiments of the present invention, the curvature of the curve of the first transition surface gradually decreases along the axial direction away from the T-axis.

[0010] According to some embodiments of the present invention, the two first lugs are arranged in a rotationally symmetrical manner.

[0011] According to a first aspect of the present invention, a striking component accessory includes an accessory body, the accessory body being a striking block, the striking block having a groove, the sidewall of the groove having a second lug, the upper side and the peripheral side of the second lug having a second overturning plane and a second abutting plane respectively, and the intersection edge of the second abutting plane and the second overturning plane having a second transition curved surface.

[0012] A striking component accessory according to an embodiment of the present utility model has at least the following beneficial effects: Through the above structure, on the one hand, a second transition surface is set in the key stress concentration area of ​​the second lug (the intersection edge of the second abutment plane and the second overturning plane, i.e., the contact overturning part of the second lug), which can effectively reduce the stress concentration effect of the original edge. This structure allows the impact load to be smoothly dispersed during the contact overturning process, greatly reducing local stress, thereby slowing down the damage to the second lug and thus significantly extending the service life of the impact block and even the impact assembly and impact screwdriver; on the other hand, the design of the second transition surface makes the movement trajectory of the impact block lug smoother when overturning the T-axis lug, which can reduce the vibration and noise generated in this process.

[0013] According to some embodiments of the present invention, the curvature of the curve of the second transition surface gradually increases along the axis away from the striking block.

[0014] According to some embodiments of the present invention, the second lug is provided as two, and the two second lugs are arranged opposite to each other.

[0015] According to some embodiments of the present invention, the two second lugs are arranged in a rotationally symmetrical manner.

[0016] The striking assembly according to a second aspect of the present invention includes the two striking assembly accessories described above.

[0017] The striking component according to the embodiments of the present invention has at least the following beneficial effects: the above structure can effectively extend the service life.

[0018] An impact screwdriver according to a third aspect embodiment of the present invention includes the striking component as described above.

[0019] The impact screwdriver according to the present invention has at least the following beneficial effects: the above structure can effectively extend the service life.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural diagram of an embodiment of a strike component accessory of this utility model; Figure 2 for Figure 1 Another structural diagram of the strike component accessories shown; Figure 3 This is a structural diagram of another embodiment of the impact component accessory of this utility model; Figure 4 for Figure 3 Another structural diagram of the strike component accessories shown; Figure 5 This is a structural diagram of the striking component of this utility model.

[0022] Figure label: T-axis 100, first lug 110, first overturning plane 111, first abutting plane 112, first transition surface 113; Impact block 200, groove 210, second lug 220, second overturning plane 221, second abutting plane 222, second transition surface 223. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] In the description of this utility model, the use of terms such as first, second, third, fourth, and fifth is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0026] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Reference Figure 1 and Figure 2 This utility model discloses a striking component accessory, which includes an accessory body, a T-shaft 100, and two ends of the transverse portion of the T-shaft 100, each having a first lug 110. The upper and circumferential sides of the first lug 110 are respectively provided with a first overturning plane 111 and a first abutting plane 112. A first transition surface 113 is provided at the intersection of the first abutting plane 112 and the first overturning plane 111. The two first lugs 110 are arranged rotationally symmetrically.

[0028] With the above structure, on the one hand, a first transition surface 113 is provided in the key stress concentration area of ​​the first lug 110 (the intersection edge of the first abutting plane 112 and the first overturning plane 111, i.e., the contact overturning part of the first lug 110), which can effectively reduce the stress concentration effect of the original edge. This structure allows the impact load to be smoothly dispersed during the contact overturning process, greatly reducing local stress, thereby slowing down the damage to the first lug 110, and thus significantly extending the service life of the T-axis 100 and even the impact assembly and impact screwdriver; on the other hand, the design of the first transition surface 113 makes the movement trajectory of the impact block 200 lug when overturning the T-axis 100 lug smoother, which can reduce the vibration and noise generated in this process.

[0029] In this embodiment, refer to Figure 2 The curvature of the curve on the first transition surface 113 gradually decreases along the axial direction away from the T-axis 100. As shown in the figure, the curvature of curve L1 on the first transition surface 113 is greater than that of curve L2 on the first transition surface 113.

[0030] With the above structure, different parts of the first lug 110 bear different loads during the impact. Specifically, the outer portion of the first lug 110, farther from the T-axis 100, experiences more intense impact dynamic loads and bending stresses due to its higher linear velocity and longer lever arm during impact. To address this, the design of gradually decreasing curve curvature (i.e., transitioning from a steeper inner surface to a gentler outer surface) provides a smoother, softer transition in the outer region where stress is greatest, achieving stress optimization that matches the impact load distribution.

[0031] Reference Figure 3 and Figure 4 This utility model discloses a striking component accessory, comprising an accessory body, which is a striking block 200. The striking block 200 has a groove 210, and the sidewall of the groove 210 has a second lug 220. The upper side and the peripheral side of the second lug 220 are respectively provided with a second overturning plane 221 and a second abutting plane 222. A second transition curved surface 223 is provided at the intersection edge of the second abutting plane 222 and the second overturning plane 221. Two second lugs 220 are provided, and the two second lugs 220 are arranged opposite each other and rotationally symmetrically.

[0032] Through the above structure, on the one hand, a second transition surface 223 is provided in the key stress concentration area of ​​the second lug 220 (the intersection edge of the second abutment plane 222 and the second overturning plane 221, i.e., the contact overturning part of the second lug 220), which can effectively reduce the stress concentration effect of the original edge. This structure allows the impact load to be smoothly dispersed during the contact overturning process, greatly reducing local stress, thereby slowing down the damage to the second lug 220, and thus significantly extending the service life of the impact block 200 and even the impact assembly and impact screwdriver; on the other hand, the design of the second transition surface 223 makes the movement trajectory of the lug of the impact block 200 smoother when it overturns the lug of the T-axis 100, which can reduce the vibration and noise generated in this process.

[0033] In this embodiment, refer to Figure 4 The curvature of the curve on the second transition surface 223 gradually increases along the axis away from the striking block 200. As shown in the figure, the curvature of curve L3 on the second transition surface 223 is greater than that of curve L4 on the second transition surface 223.

[0034] With the above structure, the striking block 200 acts as an active impact component, rotating while moving at high speed along the axial direction under the drive of the spring. The portion of the second lug 220 closest to the axis of the striking block 200 is the first to contact the lug of the T-axis 100 and begin the vaulting process. A small curvature design (a gentler ramp design) is used at this location to make the initial contact and climbing / vaulting action smoother and less strenuous, reducing the impact and sticking sensation during the initial vaulting start.

[0035] This utility model also proposes a striking component, as shown in the reference. Figure 5 It includes the two impact component accessories mentioned above, namely the T-axis 100 and the impact block 200. This structure effectively extends the service life.

[0036] This invention further proposes an impact screwdriver, which includes the aforementioned striking component. Through the above structure, the service life can be effectively extended.

[0037] In summary, referring to Figure 5 The working process of the impact component of an impact screwdriver includes: 1. Synchronous rotation and normal torque output stage: The impact screwdriver motor drives the impact block 200 to rotate. The second abutting plane 222 of the second lug 220 of the impact block 200 abuts against the first abutting plane 112 of the first lug 110 of the T-shaft 100. The rotating impact block 200 smoothly transmits torque to the T-shaft 100 through the first abutting plane 112 and the second abutting plane 222. The T-shaft 100 then drives the screwdriver bit to rotate.

[0038] 2. Impact Knob Output Stage: When the resistance encountered by the screwdriver bit (such as screw tightening) exceeds a certain threshold, the T-axis 100 (and the screwdriver bit) is forced to stop rotating. However, the impact screwdriver motor continues to drive the impact block 200 to continue rotating. Since the T-axis 100 stops, the second lug 220 of the impact block 200 can no longer push the first lug 110 of the T-axis 100 through the second abutment plane 222. Therefore, the second lug 220 begins to climb over the first overturning plane 111 of the first lug 110. This climbing action forces the impact block 200 to overcome the spring force and move backward along the axial direction, thereby compressing the spring and converting some of the rotational kinetic energy into the elastic potential energy of the spring. When the second lug 220 of the impact block 200 completely climbs over the first lug 110 of the T-axis 100, the contact between the impact block 200 and the T-axis disengages, and the previously compressed spring instantly loses its constraint, violently releasing its stored elastic potential energy, which is converted into the axial kinetic energy of the impact block 200, propelling the impact block 200 forward in an impact. Under the combined action of spring force and rotational inertia, the high-speed forward-moving and rotating impact block 200 has its second lug 220 violently impacting the first abutment plane 112 of the T-shaft 100 at extremely high speed. This generates a peak torque (impact torque) far exceeding the capacity of the motor itself, which is transmitted to the bit through the T-shaft 100 to overcome the stubborn resistance of the fastener.

[0039] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A striking component accessory, characterized in that: The accessory body is a T-shaft (100). The two ends of the transverse portion of the T-shaft (100) are both first lugs (110). The upper side and the peripheral side of the first lug (110) are respectively provided with a first overturning plane (111) and a first abutting plane (112). The first abutting plane (112) and the first overturning plane (111) are provided with a first transition surface (113) at the intersection edge of the first abutting plane (112) and the first overturning plane (111).

2. The impact component accessory according to claim 1, characterized in that: The curvature of the first transition surface (113) gradually decreases along the axial direction away from the T-axis (100).

3. The impact component accessory according to claim 2, characterized in that: The two first lugs (110) are arranged in a rotationally symmetrical manner.

4. A striking component accessory, characterized in that: The accessory body is a striking block (200). The striking block (200) has a groove (210). The side wall of the groove (210) has a second lug (220). The upper side and the peripheral side of the second lug (220) are respectively provided with a second overturning plane (221) and a second abutting plane (222). A second transition surface (223) is provided at the intersection edge of the second abutting plane (222) and the second overturning plane (221).

5. A striking component accessory according to claim 4, characterized in that: The curvature of the second transition surface (223) gradually increases along the axis away from the striking block (200).

6. The impact component accessory according to claim 4, characterized in that: The second lug (220) is provided in two parts, and the two second lugs (220) are arranged opposite to each other.

7. A strike component accessory according to claim 6, characterized in that: The two second lugs (220) are arranged in a rotationally symmetrical manner.

8. The striking component, characterized in that: Includes the strike component accessories as described in any one of claims 1-3, and the strike component accessories as described in any one of claims 4-7.

9. An impact screwdriver, characterized in that: Includes the strike component as described in claim 8.

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