Torque Screwdriver Hollow Handle Digit Roller Counter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing torque tools, such as torque screwdrivers, face challenges in terms of installation space and functional improvement, particularly in the design of the display system and torque adjustment mechanism.
Innovation Solution
A torque tool with a compact dial roll counting system integrated into the handle, featuring a hollow cylindrical length section with a viewing window for displaying the set torque. The system includes a carrier disc, switching wheel, and digit rolls with drive and switching toothing, allowing for efficient torque adjustment and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a digital counter with multiple digits is integrated into the handle, then the torque setting display functionality is improved, but the installation space requirement increases
Solution Approach 1:
The digital counter is nested within a hollow cylindrical section of the handle, utilizing the existing internal space. The digit rollers are arranged concentrically with the handle axis, allowing the display mechanism to be compactly integrated without increasing the overall handle volume.
Solution Approach 2:
The digit rollers are arranged radially around the handle axis rather than linearly, utilizing the radial dimension of the hollow cylindrical section. This circular arrangement allows multiple digits to be displayed within the limited axial and radial space of the handle.
2Ease of manufacture
If the housing is made in two parts to accommodate the digital counter, then the assembly flexibility is improved, but the manufacturing complexity increases
Solution Approach 1:
The handle is divided into a handle body and a separate hollow cylindrical section that can be inserted into the handle body. This segmentation allows the digital counter to be pre-assembled in the cylindrical section and then integrated into the handle, improving assembly flexibility while maintaining structural integrity.
3Measurement precision
If the digit roller is permanently coupled to the actuator, then the torque adjustment precision is improved, but the mechanical complexity increases
Solution Approach 1:
The actuator is permanently coupled to the first digit roller, ensuring that every rotational movement of the actuator is continuously transmitted to the digit roller without interruption. This continuous coupling ensures precise torque adjustment by maintaining constant mechanical engagement between the actuator and the display mechanism.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a torque tool, in particular a torque screwdriver (1), having a handle (2) and an adjusting body (7), which can be rotated about the longitudinal axis (L) of the handle (2) and is intended for adjusting a torque, and also having a display (3) for an adjusted torque, the display comprising a digit roller counter (10), wherein the digital counter (10) has at least two digit rollers (11, 12, 13). According to the invention, the digit roller counter (10) is arranged in a hollow-cylindrical length portion (14) of the handle (2), which has a viewing window (16) through which the adjusted torque is visible, and the digit roller counter (10) has, along its central axis (ML), a passage (17), through which a shaft portion (18) is guided, wherein incorporated between two digit rollers (11, 12 and/or 12, 13) is a carrier disc (30), which is arranged for conjoint rotation in the handle (2), and the carrier disc (30) is rotatably assigned a selector wheel (33), which has a drive-toothing formation (39) and a selector-toothing formation (40), and wherein a digit roller (11, 12, 13) has an outer digit ring (20), which has a first ring portion (21) with a drive-toothing formation (22) and a second ring portion (23) with a selector element (24), and wherein the adjusting body (7) has means for transmitting a rotary movement of the adjusting body (7) to the digit roller (11), which is arranged on the adjusting body.