Wrench

Abstract

The utility model discloses a wrench which is convenient for screwing a threaded fastener in a narrow space. The wrench comprises a lead screw, a sliding piece and an elastic piece. The screw rod can rotate to screw the threaded fastener; the sliding piece is arranged on the peripheral side of the lead screw and can slide along the lead screw to drive the lead screw to rotate; the elastic piece is connected with the sliding piece, and the sliding piece slides to enable the elastic piece to elastically deform so as to reset the sliding piece.

Description

Technical Field

[0001] This utility model relates to a wrench, specifically a wrench operated by linear sliding. Background Technology

[0002] During the assembly of aero engines, it is often necessary to tighten threaded fasteners in deep cavities, where the operating space is limited. Figure 1 For example, when using an L-shaped wrench to tighten the internal hex screw 2 in the deep cavity 1, the space between the L-shaped wrench and the wall of the deep cavity 1 is too narrow. During the rotation of the L-shaped wrench, the wrench and the operator's limbs are prone to interference with the wall of the deep cavity, making the operation inconvenient and inefficient. Utility Model Content

[0003] The purpose of this invention is to provide a wrench that facilitates the tightening of threaded fasteners in confined spaces.

[0004] According to an embodiment of the present invention, the wrench includes a lead screw, a sliding member, and an elastic member; the lead screw is rotatable to tighten threaded fasteners; the sliding member is disposed on the outer periphery of the lead screw, and the sliding member is slidable along the lead screw to drive the lead screw to rotate; the elastic member is connected to the sliding member, and the sliding of the sliding member can cause the elastic member to elastically deform to reset the sliding member.

[0005] In one or more embodiments, the lead screw is equipped with a reversing ratchet sleeve to tighten threaded fasteners.

[0006] In one or more embodiments, the lead screw is provided with a helical groove, and the slider is provided with a first protrusion, which is inserted into the helical groove and threadedly engaged, so that the slider drives the lead screw.

[0007] In one or more embodiments, the spiral groove includes a bidirectional spiral groove, the slider sliding in the forward direction can drive the lead screw to rotate in the forward direction, and the slider sliding in the reverse direction can drive the lead screw to rotate in the reverse direction.

[0008] In one or more embodiments, the lead screw is provided with a second protrusion extending outward, the elastic element is connected between the second protrusion and the sliding element, and the sliding element can slide to change the distance from the second protrusion so that the elastic element can elastically deform.

[0009] In one or more embodiments, the elastic element includes a helical spring sleeved on the outer periphery of the lead screw, one end of the helical spring being connected to the second protrusion, and the other end of the helical spring being connected to the sliding element.

[0010] In one or more embodiments, the second protrusion provides a guide rod, the sliding member provides a guide hole, the guide rod is inserted into the guide hole and slidingly fits to guide the sliding member to slide along the screw rod.

[0011] In one or more embodiments, the second protrusion fits with the screw rod shaft hole and allows the screw rod to rotate.

[0012] In one or more embodiments, the screw rod provides a third protrusion protruding outwardly from the periphery, the sliding member is located between the second protrusion and the third protrusion, and the third protrusion blocks the sliding member from coming out of the screw rod.

[0013] In one or more embodiments, the second protrusion provides a plurality of guide rods, the sliding member provides a plurality of guide holes, and each guide rod is inserted into a guide hole and slidingly fits.

[0014] The embodiments of the present application have at least one of the following beneficial effects:

[0015] In the use scenario of using a wrench to turn an inner hexagonal screw in a deep cavity, an external force is applied to the sliding member to move the sliding member linearly along the screw rod, the sliding member drives the screw rod to rotate around the central axis to turn the inner hexagonal screw, and the linear movement of the sliding member along the screw rod requires less space, which is convenient for use in deep cavities with small operation space, the wrench and the limbs of the operator are not easy to interfere with the wall surface of the deep cavity, and the operation is convenient and efficient. And, the elastic member is elastically deformed by the external force to make the sliding member slide, and when the sliding member returns to the original position, the elastic member applies a driving force to the sliding member to help the sliding member return to the original position without sliding, thereby reducing the labor intensity of the operator and improving the efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other features, properties, and advantages of the present application will become more apparent through the following description with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 is a schematic view of using an L-shaped wrench to turn an inner hexagonal screw in a deep cavity in the prior art;

[0018] Figure 2 is an oblique view of the wrench of the present application;

[0019] Figure 3 is a cross-sectional view of the wrench of Figure 2 ;

[0020] Figure 4 is an oblique view of the wrench of Figure 2 after the reversing ratchet sleeve is removed;

[0021] Figure 5 is an oblique view of the wrench of Figure 2Oblique view of commutating ratchet sleeve

[0022] Figure 6 For Figure 2 Oblique view of lead screw

[0023] Figure 7 For Figure 2 Oblique view of slider

[0024] Figure 8 For Figure 2 Schematic view of wrench turning socket head cap screw in deep cavity.

[0025] Reference numerals:

[0026] 1 - Deep cavity

[0027] 2 - Socket head cap screw

[0028] 3 - Lead screw

[0029] 4 - Slider

[0030] 5 - Resilient member

[0031] 6 - Helical groove

[0032] 7 - First protrusion

[0033] 8 - Commutating ratchet sleeve

[0034] 9 - Second protrusion

[0035] 10 - Coil spring

[0036] 11 - Guide rod

[0037] 12 - Guide hole

[0038] 13 - Third protrusion

[0039] 14 - Limiting step DETAILED DESCRIPTION

[0040] The utility model will be further described in connection with specific embodiments and drawings, more details are set forth in the following description in order to fully understand the utility model, but the utility model can obviously be implemented in a variety of other ways different from this description, and those skilled in the art can make similar generalization, deduction according to actual application conditions without departing from the connotation of the utility model, therefore the protection scope of the utility model should not be limited by the content of this specific embodiment.

[0041] It should be noted that these and other subsequent drawings are merely examples, and are not drawn to scale, and should not be used as a limitation on the actual scope of protection required by the utility model.

[0042] The terms "first", "second", and the like can be used interchangeably to distinguish one feature from another and are not intended to mean that the individual features must be in a particular location as shown in the figures.

[0043] As shown in Figures 2 to 4 , the wrench includes a screw rod 3 rotatable to tighten a threaded fastener, the screw rod 3 being rotatable about a central axis thereof. The wrench further includes a slider 4 disposed at an outer peripheral side of the screw rod 3, the slider 4 being an annular member having a central hole, the screw rod 3 being inserted into the central hole of the slider 4, the slider 4 being sleeved at the outer peripheral side of the screw rod 3. The slider 4 is slidable along the screw rod 3 to drive the screw rod 3 to rotate, the slider 4 and the screw rod 3 cooperating to convert a linear movement of the slider 4 along the screw rod 3 into a rotation of the screw rod 3 about the central axis. The wrench further includes an elastic member 5 connected to the slider 4, the slider 4 being slidable along the screw rod 3 to elastically deform the elastic member 5, the elastic member 5 being elastically deformed to tend to restore to an original state, so that the elastic member 5 tends to drive the slider 4 to return to the original position of the slider 4 before the slider 4 is slidable. Figure 8 In a use scenario of using the wrench to tighten an inner hexagonal screw in a deep cavity, an external force is applied to the slider 4 to linearly move the slider 4 along the screw rod 3, the slider 4 drives the screw rod 3 to rotate about the central axis to tighten the inner hexagonal screw, compared with Figure 1 the L-shaped wrench shown in the drawings, the linear movement of the slider 4 along the screw rod 3 requires less space, and is convenient to use in a deep cavity or the like with a small operation space, the wrench and the limbs of the operator are less likely to interfere with the wall surface of the deep cavity, and the wrench is convenient to operate and improves efficiency. Moreover, the external force applied to the slider 4 to slide the slider 4 elastically deforms the elastic member 5, and when the slider 4 returns to the original position, if the slider 4 needs to reciprocate to complete the tightening, the elastic member 5 applies a driving force to the slider 4 to help the slider 4 to return to the original position of the slider 4 before the slider 4 is slidable, which reduces the labor intensity of the operator and improves the efficiency.

[0044] As shown in Figure 6 , the screw rod 3 can be a helical screw rod, and the screw rod 3 can be provided with a helical groove 6 extending helically on an outer surface of the screw rod 3. As shown in Figure 7 , the slider 4 can be provided with a first protrusion 7 protruding inward from a wall surface of the central hole of the slider 4 to the inner peripheral side. The first protrusion 7 is inserted into the helical groove 6 and threadedly cooperates with the helical groove 6 to achieve helical transmission, and the slider 4 linearly moves to drive the screw rod 3 to rotate. Further, the screw rod 3 can be a bidirectional helical screw rod, and the helical groove 6 can be a bidirectional helical groove including two helical grooves with opposite rotation directions, the slider 4 sliding in a forward direction can drive the screw rod 3 to rotate in the forward direction, and the slider 4 sliding in a reverse direction can drive the screw rod 3 to rotate in the reverse direction. Further Figure 8, part of the threaded fastener required to turn more, the number of turns of the sliding member 4 single sliding drive screw 3 can not be fully tightened or loosening the threaded fastener, the sliding member 4 forward sliding drive screw 3 forward rotation half of the way to drive the threaded fastener, the screw 3 and threaded fastener disengaged, the sliding member 4 reverse sliding drive screw 3 reverse rotation back, again the sliding member 4 forward sliding drive screw 3 forward rotation half of the way to drive, through the sliding member 4 along the screw 3 reciprocating sliding complete threaded fastener full range of drive, easy to operate, improve efficiency.

[0045] As shown in Figure 2 and Figure 3 , the screw 3 can be provided as shown in Figure 5 the reversing ratchet sleeve 8, the reversing ratchet sleeve 8 is directly connected to the threaded fastener, the screw 3 is indirectly connected to the threaded fastener through the reversing ratchet sleeve 8, the screw 3 and the reversing ratchet sleeve 8 cooperate to achieve one-way rotation of the threaded fastener, in the aforementioned sliding member 4 reciprocating sliding complete full range of drive scene, the sliding member 4 forward sliding drive screw 3 forward rotation half of the way to drive after the threaded fastener, without disengaging, keep the reversing ratchet sleeve 8 connected to the threaded fastener, the sliding member 4 reverse sliding drive screw 3 reverse rotation back, the screw 3 and the reversing ratchet sleeve 8 one-way transmission will not rotate back the threaded fastener, again the sliding member 4 forward sliding drive screw 3 forward rotation half of the way to drive, easy to operate, improve efficiency. In addition, the reversing ratchet sleeve 8 can adjust the one-way rotation direction, easy to operate, improve efficiency. As shown in Figure 8 , the reversing ratchet sleeve 8 can be set to left-handed drive right-handed idle, the sliding member 4 along the screw 3 upward sliding drive screw 3 left-handed to drive the reversing ratchet sleeve 8 to tighten the threaded fastener, the sliding member 4 upward sliding stroke is exhausted, the sliding member 4 along the screw 3 downward sliding drive screw 3 right-handed, the reversing ratchet sleeve 8 idle does not tighten the threaded fastener, the sliding member 4 reciprocating sliding complete full range of drive. The reversing ratchet sleeve 8 can also be set to right-handed drive left-handed idle, the sliding member 4 along the screw 3 downward sliding drive screw 3 right-handed to drive the reversing ratchet sleeve 8 to tighten the threaded fastener, the sliding member 4 downward sliding stroke is exhausted, the sliding member 4 along the screw 3 upward sliding drive screw 3 left-handed, the reversing ratchet sleeve 8 idle does not tighten the threaded fastener, the sliding member 4 reciprocating sliding complete full range of drive. In addition, the reversing ratchet sleeve 8 and the screw 3 are detachably connected, by replacing different reversing ratchet sleeve 8, different types and different specifications of threaded fastener can be tightened.

[0046] As shown in Figure 3As shown, the second protruding part 9 can be provided with a guide rod 11, as shown, the sliding member 4 can be provided with a guide hole 12, the guide rod 11 is inserted into the guide hole 12 and slidingly fitted to guide the sliding member 4 to slide along the lead screw 3, the guide rod 11 can protrude from the second protruding part 9 to the side where the sliding member 4 is located, and the central axis of the guide rod 11 is parallel to the central axis of the lead screw 3, the central axis of the guide hole 12 is also parallel to the central axis of the lead screw 3, the guide hole 12 guides the sliding member 4 to move along the lead screw 3, improving the stability of the movement of the sliding member 4. The second protruding part 9 can be provided with multiple guide rods 11, and the sliding member 4 can be provided with multiple guide holes 12, each guide rod 11 is inserted into a guide hole 12 and slidingly fitted, multiple sets of guide rods 11 and guide holes 12 slidingly fitted guide the sliding member 4 to move along the lead screw 3, further improving the stability of the movement of the sliding member 4.

[0047] As shown, Figure 2 the second protruding part 9 can be provided with a guide rod 11, as shown, Figure 7 the sliding member 4 can be provided with a guide hole 12, the guide rod 11 is inserted into the guide hole 12 and slidingly fitted to guide the sliding member 4 to slide along the lead screw 3, the guide rod 11 can protrude from the second protruding part 9 to the side where the sliding member 4 is located, and the central axis of the guide rod 11 is parallel to the central axis of the lead screw 3, the central axis of the guide hole 12 is also parallel to the central axis of the lead screw 3, the guide hole 12 guides the sliding member 4 to move along the lead screw 3, improving the stability of the movement of the sliding member 4. The second protruding part 9 can be provided with multiple guide rods 11, and the sliding member 4 can be provided with multiple guide holes 12, each guide rod 11 is inserted into a guide hole 12 and slidingly fitted, multiple sets of guide rods 11 and guide holes 12 slidingly fitted guide the sliding member 4 to move along the lead screw 3, further improving the stability of the movement of the sliding member 4.

[0048] As shown, Figure 3 the second protruding part 9 is fitted with the shaft hole of the lead screw 3 and allows the lead screw 3 to rotate, the cooperation of the guide hole 12 and the guide rod 11 prevents the second protruding part 9 from rotating and keeps it stationary, the lead screw 3 is inserted into the central hole of the second protruding part 9 to form a shaft hole fit, allowing the lead screw 3 to rotate within the central hole of the second protruding part 9, avoiding the second protruding part 9 from hindering the rotation of the lead screw 3.

[0049] As shown, Figure 2 the third protruding part 13 can be a stop block and is fixed on the top end of the lead screw 3 by a spring retainer, preventing the sliding member 4 from sliding upward and limiting the top end of the sliding stroke of the sliding member 4. As shown, Figure 3 the lead screw 3 can be provided with a limiting step 14 at the bottom end of the helical groove 6, preventing the sliding member 4 from sliding downward and limiting the bottom end of the sliding stroke of the sliding member 4.

[0050] The utility model discloses although the embodiment discloses above, but it is not used to limit the utility model, and any person skilled in the art can make possible change and modification without departing from the spirit and scope of the utility model.

Claims

1. A wrench characterized by Comprising: a screw rod rotatable to screw a threaded fastener; a slider disposed on an outer circumferential side of the screw rod, the slider slidable along the screw rod to drive the screw rod to rotate; and a resilient member connected to the slider, the slider slidable to elastically deform the resilient member to reset the slider.

2. The wrench of claim 1, wherein: the screw rod is provided with a reversing ratchet sleeve to screw the threaded fastener.

3. The wrench of claim 1, wherein: the screw rod is provided with a helical groove, the slider is provided with a first protrusion, the first protrusion is inserted into the helical groove and threadedly engaged to drive the slider to drive the screw rod.

4. The wrench of claim 3, wherein: the helical groove comprises a bidirectional helical groove, the slider slidable in a forward direction to drive the screw rod to rotate in a forward direction, the slider slidable in a reverse direction to drive the screw rod to rotate in a reverse direction.

5. The wrench of claim 1, wherein: the screw rod is provided with a second protrusion protruding outwardly from the outer circumferential side, the resilient member is connected between the second protrusion and the slider, the slider slidable to change a distance from the second protrusion to elastically deform the resilient member.

6. The wrench of claim 5, wherein: the resilient member comprises a helical spring, the helical spring is sleeved on the outer circumferential side of the screw rod, one end of the helical spring is connected to the second protrusion, the other end of the helical spring is connected to the slider.

7. The wrench of claim 5, wherein: the second protrusion is provided with a guide rod, the slider is provided with a guide hole, the guide rod is inserted into the guide hole and slidingly engaged to guide the slider to slide along the screw rod.

8. The wrench of claim 7, wherein: the second protrusion is engaged with a shaft hole of the screw rod and allows the screw rod to rotate.

9. The wrench of claim 5, wherein: the screw rod is provided with a third protrusion protruding outwardly from the outer circumferential side, the slider is located between the second protrusion and the third protrusion, the third protrusion blocks the slider from being pulled out of the screw rod.

10. The wrench of claim 7, wherein: the second protrusion is provided with a plurality of the guide rods, the slider is provided with a plurality of the guide holes, each of the guide rods is inserted into one of the guide holes and slidingly engaged.

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