阅读说明：本技术 用于扭矩工具的触发机构 (Trigger mechanism for torque tool ) 是由 B·詹金斯 于 2019-01-03 设计创作，主要内容包括：本发明涉及一种在理论扭矩的情形中触发的用于拧紧螺纹紧固件或类似物的电子触发式扭矩工具(12,112,212,312,412)的触发机构(10,110,210,310,410)。触发机构(10,110,210,310,410)包含驱动体(16,118,218,318,418)和基体(14,114,214,314,420),其为了传递扭矩围绕共同的轴线旋转。在此,锁定机构(30,150,219,320,414)将驱动体(16,118,218,318,418)和基体(14,114,214,314,420)为了传递扭矩彼此联接。设置有用于感测和评估所传递的扭矩的感测和评估器件,其中,信号发生器在达到理论扭矩的情形中操纵锁定机构(30,150,219,320,414),以便于将驱动体(16,118,218,318,418)与基体(14,114,214,314,420)解耦。(The invention relates to a trigger mechanism (10,110,210,310,410) for an electronic trigger torque tool (12,112,212,312,412) for tightening threaded fasteners or the like that triggers in the case of theoretical torque. The trigger mechanism (10,110,210,310,410) includes a drive body (16,118,218,318,418) and a base body (14,114,214,314,420) that rotate about a common axis for transmitting torque. The locking mechanism (30,150,219,320,414) couples the drive body (16,118,218,318,418) and the base body (14,114,214,314,420) to one another for torque transmission. Sensing and evaluating means for sensing and evaluating the transmitted torque are provided, wherein the signal generator actuates the locking mechanism (30,150,219,320,414) in the event of a setpoint torque being reached in order to decouple the drive body (16,118,218,318,418) from the base body (14,114,214,314,420).)

1. A trigger mechanism (10,110,210,310,410) for an electronic trigger torque tool (12,112,212,312,412) for tightening threaded fasteners or the like that triggers in the event of a theoretical torque, comprising

a) A drive body (16,118,218,318,418) and a base body (14,114,214,314,420) which rotate about a common axis for transmitting torque,

b) a locking mechanism (30,150,219,320,414) coupling the drive body (16,118,218,318,418) and the base body (14,114,214,314,420) to one another for transmitting torque,

c) sensing and evaluation means for sensing and evaluating the transmitted torque,

d) a signal generator which actuates the locking mechanism (30,150,219,320,414) in order to decouple the drive body (16,118,218,318,418) from the base body (14,114,214,314,420) when a target torque is reached,

it is characterized in that the preparation method is characterized in that,

e) the locking mechanism (30,150,219,320,414) has a spring-loaded lever arrangement (28,134,232,328,422), wherein the lever arrangement (28,134,232,328,422) couples the drive body (16,118,218,318,418) to the base body (14,114,214,314,420) for torque transmission and unlocks the base body (14,114,214,314,420) for free movement in the event of triggering.

2. The triggering mechanism (10,110,210,310,410) of an electronic trigger-type torque tool (12,112,212,312,412) for tightening threaded fasteners or the like, which triggers in the case of a theoretical torque according to claim 1, characterized in that an electric actuator (24,152,246,342,448) is provided which unlocks the locking mechanism (30,150,219,320,414) in the case of the theoretical torque being reached.

3. Triggering mechanism (10,110,210,310,410) of an electronic trigger torque tool (12,112,212,312,412) for tightening threaded fasteners or the like, triggered in the case of theoretical torques, according to one of claims 1 or 2, characterized in that the lever assembly (28,134,232,328,422) of the locking mechanism (30,150,219,320,414) acts on a locking element (50,124,238,334,444) which is removed from the groove (54,146,242,338,450) for locking engagement into the groove (54,146,242,338,450) of the drive body (16,118,218,318,418) and for unlocking by means of the lever assembly (28,134,232,328,422).

4. The triggering mechanism (10,110,210,310,410) of an electronic trigger torque tool (12,112,212,312,412) for tightening threaded fasteners or the like, which triggers in the case of theoretical torque according to any one of claims 1 to 3, characterized in that the lever assembly (28) is configured as a spring-loaded toggle lever assembly (34).

5. The triggering mechanism (10,110,210,310,410) of an electronic trigger torque tool (12,112,212,312,412) for tightening threaded fasteners or the like, which triggers in the case of theoretical torque according to claim 3, characterized in that the locking element (50,124,238,334,444) is arranged in a reversing tube (438) in the base body (14,114,214,314,420).

6. The triggering mechanism (10,110,210,310,410) of an electronic trigger torque tool (12,112,212,312,412) for tightening threaded fasteners or the like, which is triggered in the case of theoretical torque according to one of claims 3 and 5, characterized in that the locking element (50,124,238,334,444) is arranged in a reversing tube (438) bent at 90 ° in the base body (14,114,214,314,420), which transitions from an axial direction (440) into a radial direction (442).

7. The triggering mechanism (10,110,210,310,410) of an electronic trigger-type torque tool (12,112,212,312,412) for tightening threaded fasteners or the like, which is triggered in the case of theoretical torque, as claimed in claim 3, characterized in that an axial channel (120) in the base body (114) in which a spring-loaded and movable push rod (130) is arranged, which is moved by means of the electric actuator (152) in order to act on the lever assembly (134) for locking and in the case of triggering for unlocking in the channel (120) for creating a deflection space (156) for the locking element (124).

8. The triggering mechanism (10,110,210,310,410) of an electronic trigger torque tool (12,112,212,312,412) for tightening threaded fasteners or the like, triggered in the case of theoretical torque according to any one of claims 1 to 3, characterized in that a spring-loaded piston (222) is provided in the channel (220) of the base body (214) where the lever assembly (232) is provided with a hinge (236) for locking or unlocking the locking mechanism (219).

9. The trigger mechanism (10,110,210,310,410) of an electronic trigger torque tool (12,112,212,312,412) for tightening threaded fasteners or the like, triggered in the case of theoretical torque according to claim 3, characterized in that the base body (314) comprises an axial shaft (324) on which a spring-loaded annular body (326) is arranged, wherein the lever assembly (328) is arranged at the annular body (326) for operating the locking element (334).

Technical Field

The present invention relates to a triggering mechanism (sometimes called a release mechanism) for an electronic triggered torque tool (Drehmomentwerkzeug) for tightening threaded fasteners or the like, triggered in the case of theoretical torque, comprising an Ausl fostechanisius, sometimes called a release mechanism

a) Drive bodies (Antriebsk microphones) and matrices (Grundk microphones), which rotate about a common axis in order to transmit torque,

b) a locking mechanism (veriegelungsmechanismus), which couples the drive body and the base body to each other for transmitting torque,

c) sensing and evaluation means for sensing and evaluating the transmitted torque,

d) a signal generator, which actuates the locking mechanism for decoupling the drive body from the base body when the target torque is reached.

Background

Screw joints are the most common connection used in mechanical manufacturing. Such a connecting element can only be made effective by using a suitable assembly tool. Suitable assembly tools for this purpose include torque tools, for example, a torque screwdriver (drehmomschraubenderreher).

A torque tool is used to apply a determined torque at a workpiece. Known as torque tools are, for example, torque wrenches or torque screwdrivers. There are mechanical and electronic torque tools. In particular, there are torque tools that are displayed and activated. The displayed torque tool always displays the corresponding currently applied (anliegnend) torque. In the case of a triggered torque tool, the theoretical torque is set. Once this torque is reached in the case of tightening a screw joint, the torque tool signals the user the attainment of the theoretical torque. This may be signaled, for example, by an audible click (baby crib) or a sensible ratching (buacken). The trigger mechanism can be designed completely differently for this purpose. Thus, for example, in the case of reaching the set target torque, it is likewise possible to prevent a torque greater than the set target torque from being transmitted to the workpiece.

In this case, the torque to be transmitted in the case of a hand-held tool depends not only on the physical structure of the user (physischen Konstitution) but also on its subjective sense of strength (Kraft tempfinden). The torque tool is used to load the threaded fastener with a higher pretension in the elastic range of the threaded fastener, or can equally be used to load the threaded fastener with only a smaller pretension. The use of new construction materials (e.g. magnesium, aluminum or plastic) especially for lightweight construction in the automotive or aircraft industry can increase not only the demand but also the demand for torque tools. The number of sensitive threaded fastener connections increases as these new materials are produced. The lower tensile strength of these lightweight construction materials compared to steel leads to damage of the threads in the event of overloading of the threaded fastener connection, which renders these expensive components unusable.

The known signal-transmitting torque tool has the disadvantage, in particular, that it displays only the setpoint torque. No interruption of the transmission of torque to the workpiece occurs. Such interrupted torque tools are generally complicated to produce, structurally and are therefore also very cost-intensive.

A multifunctional pneumatic tool is known from DE 202007015971U 1. A multifunctional pneumatic tool includes a base body at which an operating rod, an inlet port, and a cylinder are arranged. A rotor with vanes is arranged in the interior of the cylinder. The cylinder body is connected with the inlet interface through the inlet switch. The inlet switch may be controlled by an operating lever. The rotational axis of the rotor is guided through the cylinder. The tool additionally comprises at least two tool heads with different functions. The connecting element is arranged at the rear end of each tool head and the connecting device is arranged at the front end of the basic body. The connecting element of any one of the tool heads is releasably connected to the connecting device at the front end of the base body. The rear end of the connecting element is releasably connected to the front end of the rotor. The releasable connection of the connecting element arranged at the rear end of the tool head to the front end of the rotor ensures that a torque is transmitted to the respective tool head in the case of a rotation of the blade.

DE 202006008056U 1 describes a force transmission device for transmitting torques of less than a settable value. The force transmission device described here is used as a socket wrench (Steckschlussel).

TW M2789822 discloses a force transmission device with adjustable torque. The force transmission device comprises a drive means, a sleeve or sleeve, a wedge element and a spring. The drive means are connected to the sleeve in such a way that they can be moved and rotated relative to one another. By adjusting the relative axial position between the drive means and the sleeve, the force introduced into the spring and thus the maximum torque that can be transmitted between the wedge element and the sleeve is adjusted.

DE 202011050280U 1 describes an adjustable torque wrench with a tool drive. The torque tool has a tool shank in the form of a tube, which extends in its longitudinal direction. At its first end section, a handle is arranged, which is mounted on the tool shaft so as to be rotatable about a longitudinal axis. The handle is coupled directly or indirectly to a clamping unit in the interior of the handle and/or the tool shank. By turning the handle, the helical spring is compressed or relieved, via which the respective tightening torque to be applied is preset. Furthermore, the handle has a folding lever which in its rest position rests against the handle. In the transition region between the tool shaft and the handle, a scale is arranged, which can have numerical information about the respectively currently set tightening torque. The transition region tapers with respect to the tool shank, wherein it decreases in cross section. A second end section of the tool shank, which is opposite the first end section, serves for coupling with a tool drive for receiving a tool, generally a tool (Aufsteckwerkzeug). For this purpose, the tool shaft, which is circular in cross section, is flattened at its second end section, so that it is configured as a rectangular opening on the end side.

A triggered torque wrench is known from german published application DE 10051011 a1, which senses torque electronically. With the strain gauge, the mechanical torque is converted into an electronic signal. The torque thus sensed is compared with a theoretical value. If the measured torque reaches the set or predefined torque setpoint value, the torque wrench is released mechanically, at least temporarily, by electronic evaluation. The release is effected here, for example, by decoupling the trigger lever and the trigger head.

DE 202014000041U 1 relates to a triggered torque tool, which comprises a handle-like housing with a handle region and a head region. A transmission assembly is provided in the housing for transmitting torque. In addition, the torque tool has an adjustment device with an adjustment knob for adjusting the desired torque, the torque achieved being signaled. The display displays the torque value at which the torque tool should be triggered. Furthermore, the torque tool comprises a triggering mechanism, with which the torque tool is triggered in the case of a set torque.

A torque tool for measuring and/or for triggering a torque for tightening a workpiece is known from DE 102006013147 a 1. The torque tool includes a housing with a handle and a lever for transmitting torque. The measuring element is used for electronically sensing the torque, which is processed by the measuring and control electronics. A trigger switch controlled by the electronic measurement and control electronics triggers the torque tool in the case of a setpoint value. The torque wrench described here has a reduction mechanism with at least one actuating element which is actuated by a trigger switch. The reduction mechanism is arranged between a lever for transmitting torque and a trigger switch for triggering an electronic control of the torque tool. In this document, it is described that the reduction mechanism comprises a switch lever with a switch edge, which is actuated by an electronically controlled trigger switch.

Disclosure of Invention

The object of the present invention is therefore to avoid the disadvantages of the prior art and to create a triggering mechanism for an electronic and triggered torque tool which is simple to construct and inexpensive to produce. In this case, in particular in the case of motor-driven torque tools, this effect should also be highly effective in the case of triggering.

This object is achieved according to the invention in that, in the case of the triggering mechanism of an electronic, triggered torque tool for tightening threaded fasteners or the like, with a theoretical torque of the type mentioned above

e) The locking mechanism has a spring-loaded lever arrangement (hebelanerdnung), wherein the lever arrangement couples the drive body with the base body for the purpose of transmitting a torque and unlocks the base body for free movement in the event of triggering.

The invention is based on the principle that the drive (which is mechanical or manual) no longer influences the screw engagement in the event of the theoretical torque being reached. The drive for transmitting the torque is decoupled for this purpose in that the base body, which transmits the torque to the workpiece, for example with an adapter, is decoupled from the drive. The base body is rotatably supported relative to the drive and is therefore freely movable in the unlocked state. By locking, the base body is not coupled to the drive, so that a torque up to the target torque can be transmitted via the drive and the base body. The locking or unlocking of the locking mechanism can be realized particularly simply by means of a lever assembly. Since the force can be easily deflected in this case in the case of actuating the triggering mechanism. Likewise, depending on the use of the lever, the forces used in the case of actuating the locking mechanism can be divided or reinforced if possible. In this case, the setpoint torque to be achieved can be preset by suitable means.

The following proves an advantageous embodiment of the triggering mechanism according to the invention when an electric actuator is provided which unlocks the locking mechanism in the event of a setpoint torque being reached. Such an electric actuator is, for example, an electrically controlled lifting magnet. Lifting magnets are known and can be easily manufactured. Furthermore, the locking mechanism can be easily electronically manipulated and operated in this manner using the lifting magnet. A suitable electronic signal is sufficient for this purpose to activate the lifting magnet.

A further advantageous embodiment of the trigger mechanism according to the invention is achieved in that the lever assembly of the locking mechanism acts on a locking element which is removed from a recess of the drive body for locking and for unlocking by means of the lever assembly. A locking element couples the base and the drive body. Once the lever assembly can act on such a locking element, the force can be transmitted to the locking element via the lever assembly at virtually any position in the torque tool. A reliable and secure locking is thereby achieved. The locking element can likewise be hardened in particular if required and can in principle be set to any desired shape (for example a ball). The shape of the receptacle or the recess should in this case be adapted to the locking element.

A suitable and advantageous configuration of the triggering mechanism according to the invention is furthermore obtained in that the lever assembly is provided as a spring-loaded toggle lever assembly. With the toggle lever assembly, the lever assembly can be realized particularly well for the triggering mechanism. The force required for triggering in the unlocked state can be easily transmitted by means of the toggle lever.

In a preferred and advantageous variant of the trigger mechanism according to the invention, the locking element is arranged in a reversing tube (Umlenkrohr) in the base body. In the case of this variant, the locking element can be moved optimally by the base body for locking or latching. It has also proved to be advantageous if the locking element is then arranged in a reversing tube bent through 90 ° in the base body, which reversing tube transitions from the axial direction into the radial direction.

In a further advantageous embodiment of the triggering mechanism according to the invention, an axial channel is provided in the base body, in which a spring-loaded and movable plunger (ribbon) is arranged, which is moved by means of an electric actuator (e.g. a lifting magnet) in order to act in a locked manner on the lever assembly and in the case of triggering for unlocking in the channel in order to create an offset space for the locking element.

A further advantageous embodiment of the trigger mechanism according to the invention is obtained in that a spring-loaded piston is arranged in the passage of the base body, at which a lever arrangement with a hinge (Gelenk, sometimes referred to as a hinge) is provided for locking or unlocking the locking mechanism.

A further preferred and expedient embodiment of the triggering mechanism according to the invention consists in that the base body comprises an axial shaft on which a spring-loaded annular body is arranged, wherein a lever assembly for actuating the locking element is arranged on the annular body.

Further embodiments and advantages result from the subject matter of the dependent claims and from the figures with the accompanying description.

Drawings

Fig. 1 shows a schematic principle diagram of a triggering mechanism according to the invention for a torque tool in a locked state in an axial longitudinal section.

Fig. 2 shows a trigger mechanism according to the invention for the torque tool according to fig. 1 in a locked state in a schematic cross section.

Figure 3 shows in a schematic principle a triggering mechanism according to the invention for the torque tool according to figures 1 and 2 in an unlocked state in an axial longitudinal section,

fig. 4 shows a schematic cross section of a trigger mechanism according to the invention for the torque tool according to fig. 3 in the unlocked state.

Fig. 5 shows in a further exemplary embodiment in axial longitudinal section a triggering mechanism according to the invention for a torque tool in the locked state.

Fig. 6 shows in a schematic cross section a trigger mechanism according to the invention for the torque tool according to fig. 5 in a locked state.

Fig. 7 shows a trigger mechanism according to the invention for a torque tool in a locked state in a third embodiment in an axial longitudinal section.

Fig. 8 shows in a schematic cross section a trigger mechanism according to the invention for the torque tool according to fig. 7 in a locked state.

Fig. 9 shows a fourth exemplary embodiment of a triggering mechanism according to the invention for a torque tool in the locked state in an axial longitudinal section.

Fig. 10 shows the inventive triggering mechanism according to fig. 9 for a torque tool in the unlocked state in an axial longitudinal section.

Fig. 11 shows a fifth exemplary embodiment of a triggering mechanism according to the invention for a torque tool in the locked state in an axial longitudinal section.

Fig. 12 shows the inventive triggering mechanism according to fig. 11 for a torque tool in the unlocked state in an axial longitudinal section.

The embodiments are further described below with reference to the accompanying drawings. The invention should not be limited to these enumerated examples. Which are used only for a more detailed description of the invention. The present invention is directed to all objects presently and hereafter devised by those skilled in the art for carrying out the present invention.