CN221248621U - Spanner tool - Google Patents

Abstract

The application discloses a wrench tool, which belongs to the technical field of manual tools and comprises a first transmission assembly, wherein the first transmission assembly comprises a transmission shaft, a first gear arranged on the transmission shaft and a rocker arm connecting rod connected with the transmission shaft; the second transmission assembly comprises a second gear which is meshed with the first gear; the transmission shaft drives the first gear to rotate relative to the second gear so as to drive the rocker arm connecting rod to rotate; wherein, the transmission ratio of the first gear and the second gear is more than 1. The application can prolong the arm of force of the spanner by arranging the rocker arm connecting rod, thereby realizing the labor-saving function.

Description

Spanner tool

Technical Field

The application belongs to the technical field of manual tools, and particularly relates to a wrench tool.

Background

During the service life of the twin-screw compressor, the twin-screw compressor needs to be assembled or disassembled, and the locking nut with a large shaft diameter needs to be fastened or loosened in the process of assembling or disassembling.

In the prior art, when an operator uses a spanner to tighten or loosen a lock nut, larger force is needed, the action amplitude is larger, the difficulty in the tightening or loosening process is larger, and the spanner cannot adapt to the actual use environment gradually.

Disclosure of utility model

The utility model aims to: the embodiment of the utility model aims to provide a wrench tool, which aims to solve the technical problems of larger force and larger action amplitude when a lock nut is fastened or loosened at present.

The technical scheme is as follows: the embodiment of the application provides a wrench tool, which comprises the following components:

The first transmission assembly comprises a transmission shaft, a first gear arranged on the transmission shaft and a rocker arm connecting rod connected with the transmission shaft;

A second transmission assembly including a second gear meshed with the first gear; the transmission shaft drives the first gear to rotate relative to the second gear so as to drive the rocker arm connecting rod to rotate;

Wherein the transmission ratio of the first gear to the second gear is greater than 1.

In some embodiments, the drive shaft includes a first segment and at least one second segment connected to the first segment, the first gear is connected to the first segment, and the rocker link is connected to the first segment; the second section extends away from the first gear and/or the rocker link.

In some embodiments, the first drive assembly further comprises a ratchet mechanism comprising a ratchet and a pawl, the ratchet and the pawl intermesh, the ratchet being connected to the first gear, the pawl being connected to the rocker link such that the first gear is unidirectionally rotatably connected to the drive shaft.

In some embodiments, the second gear includes an arcuate rack and a connecting portion, the arcuate rack being connected to the connecting portion, the arcuate rack being meshed with the first gear.

In some embodiments, the second transmission assembly further includes a fixing member, the connecting portion is provided with a fixing hole, the fixing member is disposed through the fixing hole, and the connecting portion is fixed by the fixing member.

In some embodiments, the second section is provided with one, the second section extending away from the rocker link; the first transmission assembly further comprises a limiting device, the limiting device is connected to the second section, and the limiting device is used for limiting the rocker arm connecting rod and the first gear along the extending direction of the second section.

In some embodiments, the second segments are provided in two, one of the two second segments extending away from the first gear and the other extending away from the rocker link;

The first transmission assembly further comprises a first limiting piece and a second limiting piece, and the first limiting piece is positioned on one side of the rocker arm connecting rod away from the first gear and is connected with the second section; the second limiting part is positioned at one side of the first gear far away from the rocker arm connecting rod and is connected with the second section.

In some embodiments, the first transmission assembly further includes an adjustment member positioned between the stop device and the rocker link.

In some embodiments, the first drive assembly further includes an adjustment member located between the first stop member and the rocker link, and/or the adjustment member is located between the second stop member and the first gear.

In some embodiments, the rocker link has a first connection hole and a second connection hole, the first section passing through the first connection hole; the second connecting hole is positioned at one side of the rocker arm connecting rod far away from the first section, and the second connecting hole is used for penetrating the lock nut.

In some embodiments, the sum of the pitch radii of the first gear and the second gear is equal to the pitch between the first connection hole and the second connection hole.

The beneficial effects are that: compared with the prior art, the embodiment of the application provides a wrench tool, which comprises a first transmission assembly, a second transmission assembly and a wrench tool, wherein the first transmission assembly comprises a transmission shaft, a first gear arranged on the transmission shaft and a rocker arm connecting rod connected with the transmission shaft; the second transmission assembly comprises a second gear which is meshed with the first gear; the transmission shaft drives the first gear to rotate relative to the second gear so as to drive the rocker arm connecting rod to rotate; wherein, the transmission ratio of the first gear and the second gear is more than 1. The application can prolong the arm of force of the spanner by arranging the rocker arm connecting rod, thereby realizing the labor-saving function.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic front view of a wrench tool according to an embodiment of the present application;

fig. 2 is a schematic side view of a wrench tool at a transmission shaft according to an embodiment of the application

FIG. 3 is a schematic side view of a wrench tool at a drive shaft according to further embodiments of the present application;

Fig. 4 is a cross-sectional view at A-A in fig. 2 and 3.

Reference numerals: 100-first transmission assembly, 110-transmission shaft, 111-first section, 112-second section, 120-first gear, 130-rocker link, 131-first connecting hole, 132-second connecting hole, 140-ratchet, 141-ratchet, 142-pawl, 150-stop, 151-first stop, 152-second stop, 160-adjuster, 200-second transmission assembly, 210-second gear, 211-arcuate rack, 212-connecting portion, 213-fixed hole, 220-fixed piece, 300-lock nut, 400-spanner.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the two components can be mechanically connected, can be directly connected or can be indirectly connected through an intermediate medium, and can be communicated with each other. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

During the service life of the twin screw compressor, the twin screw compressor needs to be assembled or disassembled, and the large shaft diameter lock nut 300 needs to be fastened or loosened during the assembly or disassembly process.

In the prior art, when an operator uses the wrench 400 to tighten or loosen the lock nut 300, the length of the wrench 400 is relatively long to raise the arm of force to reduce the force required for saving effort due to the large locking torque of the lock nut 300. However, in the actual operation process, the long handle wrench 400 has a heavy dead weight, the required force is still larger, and the action amplitude is larger due to the longer handle length, so that the difficulty of the fastening or loosening process of the lock nut 300 is larger, and the lock nut 300 cannot adapt to the actual use environment gradually.

In order to solve the technical problems of large force and large action amplitude when tightening or loosening the lock nut 300 in the prior art, the first embodiment of the application provides a wrench tool. Referring to fig. 1, fig. 1 is a schematic front view illustrating a structure of a wrench tool according to an embodiment of the application. The wrench tool comprises a first transmission assembly 100, wherein the first transmission assembly 100 comprises a transmission shaft 110, a first gear 120 arranged on the transmission shaft 110 and a rocker arm connecting rod 130 connected with the transmission shaft 110; a second transmission assembly 200, the second transmission assembly 200 including a second gear 210, the second gear 210 being meshed with the first gear 120; the transmission shaft 110 drives the first gear 120 to rotate relative to the second gear 210 so as to drive the rocker link 130 to rotate; wherein the transmission ratio of the first gear 120 to the second gear 210 is greater than 1.

In the first embodiment, the wrench 400 drives the transmission shaft 110, the transmission shaft 110 drives the first gear 120 to rotate, and the first gear 120 drives the rocker link 130 to drive the lock nut 300 to rotate relative to the second gear 210 due to the engagement of the first gear 120 and the second gear 210, so as to fasten or tighten the lock nut 300.

In the above process, since the transmission ratio of the first gear 120 to the second gear 210 is greater than 1, the torque required in rotating the first gear 120 is reduced, and a labor-saving operation is achieved.

In the arm of force formed by the wrench 400 and the rocker arm link 130, the operator only needs to rotate the wrench 400, i.e. the radius of the circular motion is the radius of the wrench 400 and is far smaller than the length of the arm of force when the operator rotates the wrench 400 in the circular motion, so that the action amplitude of the operator is also reduced.

In some embodiments, the drive shaft 110 includes a first section 111 and at least one second section 112 coupled to the first section 111, the first gear 120 coupled to the first section 111, and the rocker link 130 coupled to the first section 111; the second segment 112 extends away from the first gear 120 and/or the rocker link 130.

In some embodiments of the present application, the second segment 112 is located on a side of the first gear 120 remote from the rocker link 130; in other embodiments of the present application, referring to fig. 2, fig. 2 is a schematic side view of a wrench tool provided in the embodiment of the present application at a transmission shaft 110, where a second section 112 is located at a side of a rocker link 130 away from a first gear 120; in other embodiments of the application, the second section 112 is located at both ends of the first section 111.

In the above embodiment, the second section 112 is provided to provide a connection point for the transmission shaft 110 to connect with the wrench 400, and the wrench 400 is sleeved on the second section 112 to drive the transmission shaft 110 to rotate.

In certain embodiments of the present application, the cross-sectional shape of the second section 112 can be matched to the wrench 400 or the socket of the wrench 400, i.e., the cross-sectional shape of the second section 112 is a regular hexagon.

In some embodiments, the first transmission assembly 100 further includes a ratchet mechanism 140, the ratchet mechanism 140 including a ratchet wheel 141 and a pawl 142, the ratchet wheel 141 and the pawl 142 intermeshed, the ratchet wheel 141 coupled to the first gear 120, the pawl 142 coupled to the rocker link 130 such that the first gear 120 is unidirectionally rotatably coupled to the transmission shaft 110.

It will be appreciated that in order to reduce the motion amplitude during use, the wrench 400 needs to be removed from the transmission shaft 110 after being rotated by a certain angle, and then be sleeved on the transmission shaft 110 again to continue to move, so that the circular motion is only performed within a certain angle to reduce the motion amplitude.

In the above embodiment, referring to fig. 4, fig. 4 is a cross-sectional view of fig. 2 and 3 at A-A, a ratchet mechanism 140 is provided between the first gear 120 and the transmission shaft 110 to enable the first gear 120 to rotate unidirectionally relative to the transmission shaft 110, that is, the transmission shaft 110 can only transmit torque to the first gear 120 when rotating in one direction, and the transmission shaft 110 can rotate relative to the first gear 120 when rotating in the other direction, so that no torque can be generated.

In this way, after the wrench 400 is rotated to a certain angle, the operator can directly reverse the wrench 400 without removing the wrench 400, so that the wrench 400 returns to the initial position for the next operation. During the reverse rotation, the relative rotation between the transmission shaft 110 and the first gear 120 is generated due to the ratchet mechanism 140, and torque is not transmitted during the reverse rotation, so that the process of removing the wrench 400 is avoided, and the operation is simplified.

In some embodiments, the ratchet wheel 141 is an inner ratchet wheel 141, the inner ratchet wheel 141 is disposed within the first gear 120, the pawl 142 is rotatably connected to the drive shaft 110, and the pawl 142 is engaged with the ratchet wheel 141.

By the above manner, the ratchet mechanism 140 can be embedded in the first gear 120, so that the thickness of the wrench tool in the extending direction of the transmission shaft 110 is reduced.

Further, the ratchet mechanism 140 includes a connection pad, the pawl 142 is rotatably connected to the connection pad, and the connection pad is sleeved with the transmission shaft 110 and is connected to the transmission shaft 110 in a key manner, so as to realize torque transmission from the transmission shaft 110 to the connection pad.

In some embodiments, referring again to fig. 1, the second gear 210 includes an arc-shaped rack 211 and a connection portion 212, the arc-shaped rack 211 is connected with the connection portion 212, and the arc-shaped rack 211 is engaged with the first gear 120.

In the above embodiment, the second gear 210 can be fixed to the twin screw compressor housing by providing the connection portion 212 so that the lock nut 300 is rotated relative to the second gear 210 by the driving of the rocker link 130.

In some embodiments, the angle corresponding to the arc-shaped rack 211 is less than 180 ° to reduce the volume and weight of the wrench tool. When the first gear 120 exceeds the arc-shaped rack 211, the rocker arm connecting rod 130 is removed from the lock nut 300, and the lock nut 300 is sleeved again by the change angle, so that the operation can be continued.

In some embodiments, referring again to fig. 1, the second transmission assembly 200 further includes a fixing member 220, and the fixing member 220 is connected with the connecting portion 212 to fix the connecting portion 212.

In some embodiments, the fixture 220 may be a weld, i.e., the second gear 210 is welded to the casing of the twin screw compressor.

In some embodiments, referring to fig. 1 again, the connecting portion 212 is provided with a fixing hole 213, and the fixing member 220 is disposed through the fixing hole 213 to fix the second gear 210.

In some embodiments, the fixture 220 is a bolt such that the wrench tool is detachable with respect to the twin screw compressor.

In other embodiments, the securing member 220 may be a rivet or a pin that is used only to limit rotation of the second gear 210.

In some embodiments, referring to fig. 2 again, the second section 112 is provided with one, the second section 112 extends in a direction of the rocker link 130, the first transmission assembly 100 further includes a limiting device 150, the first limiting device 150 is connected to the second section 112, and the first limiting device 150 is configured to limit the rocker link 130 and the first gear 120 along the extending direction of the second section 112.

In the above embodiment, the limiting device 150 is provided to limit the displacement of the first gear 120 and the rocker link 130 sleeved with the transmission shaft 110 in the extending direction of the transmission shaft 110.

In some embodiments, referring to fig. 3 again, fig. 3 is a schematic side view of a wrench tool at a transmission shaft 110 according to another embodiment of the present application, two second sections 112 are provided, one of the two second sections 112 extends away from the first gear 120, and the other extends away from the rocker link 130; the first transmission assembly 100 further comprises a first limiting member 151 and a second limiting member 152, wherein the first limiting member 151 is positioned at one side of the rocker arm connecting rod 130 and is connected with the second section of the first gear 120; the second stop 152 is located on one side of the rocker link 130 on the principle of the first gear 120 and is connected to the second segment 112.

In the above embodiment, the space of the transmission shaft 110 can be more abundant by providing two second sections 112, so that the limiting device 150 is conveniently provided.

In some embodiments, the first limiting member 151 and the second limiting member 152 are one or more of a clamp spring, a cotter pin, and a nut, and the transmission shaft 110 is provided with a clamp spring groove, a pin control, an external thread, and the like, which are matched with one or more of the clamp spring, the cotter pin, and the nut.

In some embodiments, referring again to fig. 2, the first transmission assembly 100 further includes an adjustment member 160, the adjustment member 160 being located between the stop 150 and the rocker link 130.

In some embodiments, referring again to fig. 2 and 3, the first transmission assembly 100 further includes an adjustment member 160, the adjustment member 160 being located between the first stop member 151 and the rocker link 130, and/or the adjustment member 160 being located between the second stop member 152 and the first gear 120.

In the above embodiment, the adjusting member 160 is provided to fill the gap between the limiting device 150 and the first gear 120 and the rocker link 130, so as to avoid the movement of the first gear 120 and the rocker link 130 between the first limiting member 151 and the second limiting member 152.

In some embodiments, the adjustment member 160 is a gasket or washer.

In some embodiments, referring again to fig. 1, the rocker link 130 has a first connecting hole 131 and a second connecting hole 132, and the first segment 111 is disposed through the first connecting hole 131; the second connecting hole 132 is located at a side of the rocker link 130 away from 111, and the second connecting hole 132 is used for penetrating the lock nut 300.

In some embodiments, the sum of the pitch radii of the first gear 120 and the second gear 210 is equal to the pitch between the first connection hole 131 and the second connection hole 132.

In the above embodiment, the relationship between the sum of the reference radii of the first gear 120 and the second gear 210 and the hole distance between the first connecting hole 131 and the second connecting hole 132 can reduce the difficulty in using the wrench tool, and promote the wrench tool to operate more smoothly.

In some embodiments, the first connection hole 131 is connected with the first section 111 through a bearing to reduce friction between the first connection hole 131 and the first section 111.

The use process of the wrench tool in the above embodiment is as follows:

securing the second gear 210 to the housing of the twin screw compressor;

Sleeving the second connection hole 132 of the rocker link 130 on the lock nut 300, and enabling the first gear 120 to be engaged with the second gear 210;

connecting the wrench 400 with the second section 112 of the drive shaft 110;

Tightening or loosening of the lock nut 300 can be accomplished by turning the wrench 400.

The action process of the wrench tool in the above embodiment is as follows:

Wrench 400 transfers torque to drive shaft 110;

The drive shaft 110 transmits torque to the first gear 120;

The first gear 120 revolves relative to the second gear 210 and drives the rocker link 130 to rotate;

The rocker link 130 transfers torque to the lock nut 300 to effect tightening or loosening of the lock nut 300.

The application has been described in detail with reference to the wrench tool provided in the embodiments of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only for helping to understand the method and core idea of the present application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the present description should not be construed as limiting the present application in summary.

Claims (11)

1. Spanner frock, its characterized in that includes:

The first transmission assembly (100), the first transmission assembly (100) comprises a transmission shaft (110), a first gear (120) arranged on the transmission shaft (110) and a rocker arm connecting rod (130) connected with the transmission shaft (110);

-a second transmission assembly (200), the second transmission assembly (200) comprising a second gear (210), the second gear (210) being in mesh with the first gear (120); the transmission shaft (110) drives the first gear (120) to rotate relative to the second gear (210) so as to drive the rocker arm connecting rod (130) to rotate;

wherein the transmission ratio of the first gear (120) to the second gear (210) is greater than 1.

2. The wrench tool according to claim 1, wherein the drive shaft (110) comprises a first section (111) and at least one second section (112) connected to the first section (111), the first gear (120) is connected to the first section (111), and the rocker link (130) is connected to the first section (111); the second section (112) extends away from the first gear (120) and/or the rocker link (130).

3. The wrench tool according to claim 1, wherein the first transmission assembly (100) further comprises a ratchet mechanism (140), the ratchet mechanism (140) comprising a ratchet wheel (141) and a pawl (142), the ratchet wheel (141) and the pawl (142) being engaged with each other, the ratchet wheel (141) being connected to the first gear (120), the pawl (142) being connected to the rocker arm link (130) such that the first gear (120) is connected to the transmission shaft (110) in a unidirectional rotational manner.

4. The wrench tool according to claim 1, wherein the second gear (210) includes an arc-shaped rack (211) and a connecting portion (212), the arc-shaped rack (211) is connected with the connecting portion (212), and the arc-shaped rack (211) is meshed with the first gear (120).

5. The wrench tool according to claim 4, wherein the second transmission assembly (200) further comprises a fixing member (220), the connecting portion (212) is provided with a fixing hole (213), the fixing member (220) is arranged in the fixing hole (213) in a penetrating manner, and the connecting portion (212) is fixed through the fixing member (220).

6. The wrench tool according to claim 2, wherein the second section (112) is provided with one, the second section (112) extending away from the rocker link (130); the first transmission assembly (100) further comprises a limiting device (150), the limiting device (150) is connected to the second section (112), and the limiting device (150) is used for limiting the rocker arm connecting rod (130) and the first gear (120) along the extending direction of the second section (112).

7. The wrench tool according to claim 2, wherein two second sections (112) are provided, one of the two second sections (112) extending away from the first gear (120) and the other extending away from the rocker link (130);

The first transmission assembly (100) further comprises a first limiting piece (151) and a second limiting piece (152), wherein the first limiting piece (151) is positioned on one side of the rocker arm connecting rod (130) away from the first gear (120) and is connected with the second section (112); the second limiting piece (152) is located on one side, away from the rocker connecting rod (130), of the first gear (120) and is connected with the second section (112).

8. The wrench tool according to claim 6, wherein the first transmission assembly (100) further includes an adjustment member (160), the adjustment member (160) being located between the stop device (150) and the rocker link (130).

9. The wrench tool according to claim 7, wherein the first transmission assembly (100) further comprises an adjustment member (160), the adjustment member (160) being located between the first stop member (151) and the rocker arm link (130) and/or the adjustment member (160) being located between the second stop member (152) and the first gear (120).

10. The wrench tool according to claim 2, wherein the rocker link (130) has a first connection hole (131) and a second connection hole (132), and the first section (111) is threaded through the first connection hole (131); the second connecting hole (132) is located at one side of the rocker connecting rod (130) far away from the first section (111), and the second connecting hole (132) is used for penetrating the lock nut (300).

11. The wrench tool according to claim 10, wherein the sum of the pitch radii of the first gear (120) and the second gear (210) is equal to the pitch between the first connection hole (131) and the second connection hole (132).