TWI891546B - Improved structure of torque wrench block bearing seat - Google Patents

Abstract

An improved structure for a torque wrench block support seat comprises a rod, a block, a support seat, and a spring, which are sequentially arranged within a tubular body of the wrench. Opposite ends of the rod and the support seat each have a recess, with the block positioned between the two recesses. The invention further comprises a positioning assembly positioned between the support seat and the spring. The assembly includes a positioning shaft and a flange. Based on the flange, the positioning shaft is divided into a first section and a second section. The first section penetrates into and is tightly fitted into a central axis hole of the support seat, while the second section penetrates into the inner diameter of the spring. The bottom surface of the support seat and the end of the spring clamp and limit the flange. Through the above structural arrangement, the positions of the support base and the spring are precisely fixed, effectively improving torque transmission efficiency and increasing structural stability.

Description

Improved structure of torque wrench block bearing seat

The present invention relates to a torque wrench, and more specifically, to an improved structure of the support for the block component that triggers the torque trip mechanism.

A torque wrench is a precision hand tool used to control the torque applied to a bolt or nut (referred to as the target fastener) to ensure the strength and reliability of the joint. The torque wrench is equipped with mechanical components such as a compression spring, adjustment bolt, and block. When the torque applied to the target fastener reaches a preset value, these components will produce relative displacement, triggering a torque trip mechanism, preventing the wrench's torque from being applied to the target fastener.

Patent document TWI763262B, the first figure of the patent document describes a typical tripping piece or block (symbol 11) and its related components, including a rod (symbol 12), a carrier (symbol 13), a spring (symbol 132), and a tube (symbol 14); the rod, the tripping piece, the carrier, and the spring are sequentially arranged in the tube; the tripping piece is a cube, and the rod and the carrier are arranged in a circle. Opposite locations are provided with a recess (121, 131). The release element is positioned between the two recesses. A spring applies an elastic force to the bottom of the carrier, pushing the carrier and the release element toward the rod. When the force acting on the rod exceeds the pressure set by the spring, the recess in the rod causes the release element to flip, pushing the carrier downward. The rod then strikes the tube, producing a sound to alert the user.

The potential for improvement in the prior art lies in the connection between the support and the spring. When the wrench reaches a predetermined torque, the tripping member flips and pushes down on the support. This force can cause the support to deflect, creating a biasing force on the spring. This can cause the spring's contact and adjacent sections to twist or bend away from the centerline. The spring is a crucial component for adjusting the torque wrench's torque, and this phenomenon can lead to inaccurate torque adjustment.

To solve the above problems, the present invention proposes an improved support structure.

Technical features of the invention:

An improved structure of a torque wrench block support seat comprises a rod, a block, a support seat, and a spring, which are sequentially arranged in a tube body of a wrench; the end of the rod is connected to a wrench head; the rod and the support seat are respectively provided with a recess at the opposite positions, and the block is arranged between the two recesses; the characteristics of the invention are: a positioning assembly is provided in the tube body and between the support seat and the spring; the positioning assembly The component includes a positioning shaft and a flange disposed outside the positioning shaft; the outer diameter of the flange matches the inner diameter of the tube; based on the flange, the positioning shaft is divided into a first section and a second section; the first section penetrates and fits tightly into a central shaft hole of the carrier; the second section diametrically penetrates the inner diameter of the spring; a first surface of the flange contacts the bottom surface of the carrier, and a second surface of the flange is used to push up the end of the spring.

The efficacy of this invention:

The positioning assembly maintains the alignment of the support and spring. It provides axial positioning and support for the support and spring ends, preventing them from deviating from the axis, effectively improving torque transmission efficiency and increasing structural stability.

When the wrench reaches a predetermined torque, the block is pushed and flipped by the rod, pushing the support downward. However, due to the aforementioned structural relationship, the support and the end of the spring have sufficient axial directional force to resist the force from the block. The support and the end of the spring will not deflect, and the wrench can accurately respond to the precisely adjusted torque.

10: Wrench head

11: Shaft

111: concave part

12: Carrier seat

121: concave part

122: Center shaft hole

13: Blocks

14: Positioning assembly

141: Positioning shaft

142: Fran

1421: Ring element

143: First Paragraph

144: Second paragraph

145: Side 1

146: Side 2

15: Spring

16: Tube body

[Figure 1] A three-dimensional view of the wrench of the present invention.

[Figure 2] A perspective exploded view of the first embodiment of the wrench of the present invention.

[Figure 3] Exploded top view of the first embodiment of the carrier and positioning assembly of the present invention.

[Figure 4] Exploded bottom view of the first embodiment of the carrier and positioning assembly of the present invention.

[Figure 5] Cross-sectional view of the first embodiment of the present invention.

[Figure 6] Cross-sectional and operational diagram of the first embodiment of the present invention.

[Figure 7] A perspective exploded view of the second embodiment of the wrench of the present invention.

[Figure 8] Exploded top view of the second embodiment of the carrier and positioning assembly of the present invention.

[Figure 9] Bottom exploded view of the second embodiment of the carrier and positioning assembly of the present invention.

[Figure 10] Cross-sectional view of the second embodiment of the present invention.

[Figure 11] Cross-sectional and operational diagram of the second embodiment of the present invention.

To facilitate illustration of the central concept of the present invention as outlined above, specific embodiments are presented. It should be noted that various elements in these embodiments are depicted using proportions, dimensions, deformations, or displacements appropriate for illustration, rather than to scale. In the following description, identical and symmetrically arranged elements are denoted by the same reference numerals.

As shown in Figures 1 to 5, the first embodiment of the improved torque wrench block support structure of the present invention includes a rod 11, a block 13, a support 12, a positioning assembly 14, and a spring 15. As is known in the prior art, the spring 15 is a key component for adjusting torque. However, the torque adjustment method and related components are not the core technical features of the present invention and are not shown in the drawings and will not be described in detail.

The rod 11, the block 13, the support 12, the positioning assembly 14, and the spring 15 are sequentially disposed within a tubular body 16 of the wrench. The outer end of the rod 11 is connected to a wrench head 10. Recesses 111 and 121 are respectively defined at opposing locations of the rod 11 and the support 12. The block 13 is positioned between these recesses 111 and 121.

The positioning assembly 14 includes a positioning shaft 141 and a flange 142 disposed on the exterior of the positioning shaft 141. In this embodiment, the flange 142 and the positioning shaft 141 are integrally formed metal components, but the present invention is not limited thereto. The flange 142 may also be a separate component that is threaded through and secured to the exterior of the positioning shaft 141. The flange 142 divides the positioning shaft 141 into a first section 143 and a second section 144.

The support base 12 defines a central axis hole 122. The first section 143 diametrically fits within the central axis hole 122. The second section 144 diametrically fits within the inner diameter of the spring 15. A first surface 145 of the flange 142 contacts the bottom surface of the support base 12, while a second surface 146 of the flange 142 serves to push against the end of the spring 15. The outer diameter of the flange 142 aligns with the inner diameter of the tube 16.

Based on the diameter of the central axis hole 122 of the carrier 12 and the inner diameter of the spring 15, the first section 143 and the second section 144 can be sized accordingly. Therefore, the first section 143 and the second section 144 can have equal or different diameters. Furthermore, cylindrical shapes are preferred for the first section 143 and the second section 144, but are not limited to this; geometric cylindrical shapes are also feasible.

Figures 7 to 10 illustrate a second embodiment of the improved torque wrench block support structure of the present invention. The only difference between the second embodiment and the first embodiment lies in the flange 142. In the second embodiment, the flange 142 is formed by at least one ring element 1421 threaded onto and positioned outside the positioning shaft 141. Furthermore, the flange 142 is composed of multiple ring elements 1421 stacked along the positioning shaft 141.

Preferably, the diameter of the first section 143 is larger than that of the second section 144, creating a step difference between the first section 143 and the second section 144. The flange 142 is disposed on the second section 144 and abuts against the bottom surface of the first section 143.

As shown in Figures 5, 6, 10, and 11, the outer diameter of the flange 142 aligns with the inner diameter of the tube 16, thereby maintaining the alignment of the positioning shaft 141 within the tube 16. Furthermore, the first and second segments 143, 144, which interlock with the support base 12 and the end of the spring 15, provide axial positional restraint and support for the support base 12 and the spring 15, preventing the ends of the support base 12 and the spring 15 from deflecting off the axis. The positioning assembly 14 maintains the alignment of the support base 12 and the spring 15. The compressive force of the spring 15 provides a preload, reducing gaps between components.

As shown in Figures 6 and 11, when the wrench reaches the predetermined torque, the block 13 is pushed and rotated by the rod 11, pushing down the support 12. However, due to the aforementioned structural relationship, the support 12 and the end of the spring 15 have sufficient axial directional force to resist the force from the block 13. The support 12 and the end of the spring 15 will not deflect, and the wrench can accurately respond to the precisely adjusted torque.

10: Wrench head

11: Shaft

111: concave part

12: Carrier seat

121: concave part

13: Blocks

14: Positioning assembly

141: Positioning shaft

142: Fran

143: First Paragraph

144: Second paragraph

15: Spring

16: Tube body

Claims (3)

An improved structure of a torque wrench block support seat comprises a rod, a block, a support seat, and a spring, which are sequentially arranged in a tube body of a wrench; the end of the rod is connected to a wrench head; the rod and the support seat are respectively provided with a recess at the opposite positions, and the block is arranged between the two recesses; the characteristics of the invention are: a positioning assembly is provided in the tube body, between the support seat and the spring; the positioning assembly includes a positioning shaft and a spring provided on the positioning shaft. A flange is provided on the exterior of the shaft; the positioning shaft is divided into a first section and a second section based on the flange; the outer diameter of the flange matches the inner diameter of the tube; the first section passes through and tightly fits a central shaft hole of the carrier; the second section passes through the inner diameter of the spring in a calibrated manner; a first surface of the flange contacts the bottom surface of the carrier, and a second surface of the flange is used to push up the end of the spring; the flange includes at least one ring element that is positioned on the exterior of the positioning shaft. The improved structure of the torque wrench block support as described in claim 1, wherein the flange is a plurality of ring elements stacked along the positioning axis. The improved torque wrench block support structure as described in claim 1, wherein the diameter of the first section is larger than that of the second section, and the flange is provided on the second section and abuts against the bottom surface of the first section.