CN216000296U

CN216000296U - Pretightening force adjusting mechanism and engineering machinery

Info

Publication number: CN216000296U
Application number: CN202122472384.5U
Authority: CN
Inventors: 陈贝; 黄敏华; 郑时庆; 储密利
Original assignee: Guangxi Liugong Machinery Co Ltd; Liugong Changzhou Machinery Co Ltd; Liuzhou Liugong Excavators Co Ltd
Current assignee: Guangxi Liugong Machinery Co Ltd; Liugong Changzhou Machinery Co Ltd; Liuzhou Liugong Excavators Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-03-11
Anticipated expiration: 2031-10-14

Abstract

The utility model belongs to the technical field of torque force control, a pretightning force adjustment mechanism and engineering machine tool are disclosed. This pretightning force adjustment mechanism includes: one end of the transition structure is provided with a threaded hole, and the other end of the transition structure is detachably connected to a workpiece to be adjusted; the screw rod penetrates through the threaded hole; the torque wrench is configured to clamp the screw rod and drive the screw rod to rotate relative to the transition structure, so that the transition structure can move towards a direction close to or far away from the workpiece to be adjusted, and the pretightening force of the workpiece to be adjusted is adjusted. The pre-tightening force adjusting mechanism is suitable for confirming the torsion value of a workpiece to be adjusted and adjusting the pre-tightening force through the mutual matching of the transition structure, the screw and the torque wrench, and is simple to manufacture and low in production cost.

Description

Pretightening force adjusting mechanism and engineering machinery

Technical Field

The utility model relates to a torsion control technical field especially relates to a pretightning force adjustment mechanism and engineering machine tool.

Background

An excavator is one of the most important engineering machines, and is widely applied to the fields of roads, mining, infrastructure construction and the like. Because the excavator is usually operated under the extreme working condition, higher requirements are provided for the whole safety quality, if one bolt at a certain part is loosened, the whole machine is paralyzed, and therefore the torsion value is generally confirmed in the assembly process of the excavator.

The existing torque value confirmation is realized by a torque confirmation device, which generally refers to a torque wrench, and the torque wrench can be divided into a manual type, an electric type and a pneumatic type according to different types of power sources; depending on the configuration, the wrench can be generally divided into an open-ended wrench, a box wrench and a socket wrench, but in any case, the torque of the bolt is adjusted and confirmed by the torque wrench. However, for some models, the external space of the special structural parts at the key parts is narrow, the existing torque wrench is difficult to stretch into the torque wrench for operation, the torque value cannot be adjusted and confirmed, and the safety production is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pretightning force adjustment mechanism and engineering machine tool for adjust the pretightning force, convenient to use is convenient for adjust.

To achieve the purpose, the utility model adopts the following technical proposal:

a pretension adjustment mechanism comprising:

one end of the transition structure is provided with a threaded hole, and the other end of the transition structure is detachably connected to a workpiece to be adjusted;

the screw rod penetrates through the threaded hole;

the torque wrench is configured to clamp the screw rod and drive the screw rod to rotate relative to the transition structure, so that the transition structure can move towards or away from the workpiece to be adjusted to adjust the pretightening force of the workpiece to be adjusted.

Preferably, the transition structure comprises:

the chuck is detachably connected to the workpiece to be adjusted;

the stand, protruding locate on the chuck and with the chuck is coaxial to be set up seted up along its axial direction in the stand the screw hole.

Preferably, an avoiding through hole is formed in the chuck, and the avoiding through hole is opposite to the threaded hole and used for avoiding the screw rod.

Preferably, a first connecting hole is formed in the chuck, a second connecting hole is formed in the workpiece to be adjusted and corresponds to the first connecting hole, and a connecting piece connects the transition structure and the workpiece to be adjusted through the first connecting hole and the second connecting hole.

Preferably, the number of the first connecting holes, the number of the second connecting holes and the number of the connecting pieces are all multiple, and the connecting pieces penetrate through the multiple first connecting holes and the multiple second connecting holes in a one-to-one correspondence manner.

Preferably, a spare hole is provided on the chuck corresponding to the second connection hole, and the connection member is configured to be selectively inserted through the first connection hole or the spare hole.

Preferably, the number of the spare holes is plural, and the plural spare holes and the plural first connection holes are annularly provided around the pillar.

Preferably, the cross section of the chuck is of a circular ring structure.

Preferably, the chuck and the upright are connected by welding.

In order to achieve the above object, the utility model also provides an engineering machine, including host computer and foretell pretightning force adjustment mechanism, the installation remains to adjust the work piece on the hydraulic tank of host computer, pretightning force adjustment mechanism is used for adjusting wait to adjust the pretightning force of work piece.

The utility model has the advantages that:

the utility model provides a pretightning force adjustment mechanism, when waiting to adjust the work piece and need carry out the pretightning force adjustment, connect transition structure in waiting to adjust the work piece first, form overall structure, if after the torque wrench centre gripping screw rod and drive the screw rod and rotate for transition structure, make transition structure can move to the direction of being close to waiting to adjust the work piece, realize the top tight of waiting to adjust the work piece; if the transition structure can move towards the direction far away from the workpiece to be adjusted, the workpiece to be adjusted is loosened.

Through treating to be provided with transition structure between adjusting work piece and the torque wrench, torque wrench centre gripping screw rod and screw rod wear to locate the screw hole, compare with prior art, torque wrench's application of force end is not direct action on the screw, but direct action on the screw rod, transition structure has played the effect of middle transition to extend near the outside of the application of force end follow screw with torque wrench, solved the limited problem in space around the screw. Along with torque wrench drive screw rod rotates for transition structure, the screw thread of screw rod and screw hole mutually supports, has played the transmission to turn into transition structure's thrust with torque wrench's rotatory effort, in order to reach the purpose of treating the pretightning force regulation of adjusting the work piece. Through the mutual cooperation of transition structure, screw rod and torque wrench, be adapted to the torsion value of waiting to adjust the work piece and confirm and the regulation of pretightning force, simple manufacture, manufacturing cost is lower.

The utility model provides an engineering machine tool, pretightning force adjustment mechanism are used for adjusting the pretightning force of treating the regulation work piece, make small-size excavator when initial assembly or daily maintenance, utilize pretightning force adjustment mechanism to realize treating the pretightning force regulation of adjusting the work piece, avoid treating the condition that appears too pine or tension between regulation work piece and the hydraulic tank.

Drawings

Fig. 1 is an installation schematic view of a pretightening force adjusting mechanism provided in an embodiment of the present invention at an angle;

fig. 2 is a schematic view illustrating an installation of the pretension adjusting mechanism according to an embodiment of the present invention at another angle;

fig. 3 is a schematic structural diagram of a pretightening force adjusting mechanism according to an embodiment of the present invention;

fig. 4 is an installation schematic view of a pretightening force adjusting mechanism provided by the second embodiment of the present invention at an angle;

fig. 5 is an installation schematic diagram of the pretension adjusting mechanism provided by the second embodiment of the present invention at another angle.

In the figure:

100. a hydraulic oil tank; 200. a workpiece to be adjusted;

1. a transition structure; 2. a screw; 3. a connecting member;

11. a chuck; 111. a spare hole;

12. and (4) a column.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Example one

The embodiment provides an engineering machine, as shown in fig. 1-2, the engineering machine includes a main machine, the main machine is specifically a mini excavator, a workpiece 200 to be adjusted is mounted on a hydraulic oil tank 100 of the main machine, the workpiece 200 to be adjusted is specifically a liquid level meter, and the liquid level meter is used for detecting the liquid level of hydraulic oil in the hydraulic oil tank 100, so as to avoid the situation that too much or too little hydraulic oil is present in the hydraulic oil tank 100. Alternatively, the liquid level gauge is fixed to the hydraulic oil tank 100 by screws, so that the liquid level gauge is convenient to mount and dismount.

Since the mini excavator generally works under a severe working condition, a screw for connecting the level gauge and the hydraulic oil tank 100 is easily loosened during a vibration process, and if the screw falls into the hydraulic oil tank 100, a safety accident may occur. In order to solve the problem, the engineering machine further comprises a pretightening force adjusting mechanism, wherein the pretightening force adjusting mechanism is used for adjusting the pretightening force of the workpiece 200 to be adjusted, so that the pretightening force adjusting mechanism is used for adjusting the pretightening force of the workpiece 200 to be adjusted when the mini-excavator is initially assembled or is subjected to daily maintenance, and the situation that the workpiece 200 to be adjusted is too loose or too tight between the hydraulic oil tank 100 and the workpiece 200 to be adjusted is avoided.

The existing pretightening force adjusting mechanism generally refers to a torque wrench for adjusting and confirming the torque force of a screw, and if the surrounding installation space is narrow, the torque wrench with larger size is difficult to put in, so that great difficulty is brought to the pretightening force adjustment. In order to solve the problem, as shown in fig. 3, the pretightening force adjusting mechanism provided in this embodiment includes a transition structure 1, a screw rod 2 and a torque wrench (not shown in the figure), a threaded hole is formed at one end of the transition structure 1, the other end is detachably connected to the workpiece 200 to be adjusted, and the screw rod 2 is inserted into the threaded hole. The torque wrench is configured to clamp the screw 2 and drive the screw 2 to rotate relative to the transition structure 1, so that the transition structure 1 can move towards or away from the workpiece 200 to be adjusted, and is used for adjusting the pretightening force of the workpiece 200 to be adjusted. Wherein the torque wrench can be an open type or a box wrench type.

According to the pretightening force adjusting mechanism provided by the embodiment, when the workpiece 200 to be adjusted needs to be subjected to pretightening force adjustment, the transition structure 1 is connected to the workpiece 200 to be adjusted to form an integral structure, and if the torque wrench clamps the screw 2 and drives the screw 2 to rotate relative to the transition structure 1, the transition structure 1 can move towards the direction close to the workpiece 200 to be adjusted, so that the workpiece 200 to be adjusted is tightly pushed; if the transition structure 1 can be moved away from the workpiece 200 to be adjusted, the workpiece 200 to be adjusted is released.

Through waiting to be provided with transition structure 1 between adjusting work piece 200 and the torque wrench, torque wrench centre gripping screw rod 2 and screw rod 2 wear to locate the screw hole, compare with prior art, the end of exerting force of torque wrench is not direct action on the screw, but direct action on screw rod 2, transition structure 1 has played the effect of middle transition to extend near the outside of the end of exerting force from the screw with torque wrench, solved the limited problem in space around the screw. Along with torque wrench drive screw rod 2 rotates for transition structure 1, screw rod 2 and the screw thread of screw hole mutually support, have played the transmission to turn into transition structure 1's thrust with torque wrench's rotatory effort, in order to reach the purpose of treating the pretightning force regulation of adjusting work piece 200. Through the mutual cooperation of transition structure 1, screw rod 2 and torque wrench, be adapted to the torsion value of waiting to adjust work piece 200 and confirm and the adjustment process of pretightning force, simple manufacture, manufacturing cost is lower.

Further, as shown in fig. 3, the transition structure 1 includes a chuck 11 and a column 12, the chuck 11 is a disk structure, the outer diameter of the chuck 11 is about 60mm, the thickness is about 4mm, the chuck 11 is preferably a large flat pad with high strength, and the chuck 11 is detachably connected to the workpiece 200 to be adjusted. Through setting up chuck 11, chuck 11 has increased and has waited to adjust the area of contact between the work piece 200, when guaranteeing to wait to adjust the great area of stress of work piece 200, can also guarantee to wait to adjust the stress uniformity of work piece 200. An upright post 12 is convexly arranged on the chuck 11, the upright post 12 is of a cylindrical structure, the upright post 12 and the chuck 11 are preferably arranged coaxially, so that the acting force is transmitted to the chuck 11 through the upright post 12, and the stress of the chuck 11 is relatively uniform. Preferably, the chuck 11 and the upright post 12 are connected by welding, so that the structure is simple and the manufacture is convenient.

Threaded holes are formed in the column 12 along the axial direction thereof. Alternatively, in the actual production process, the upright post 12 can be directly made of seamless steel pipe and the threaded hole is obtained by machining, so that the production cost is low. Wherein, the external diameter of stand 12 is more than for 20mm, and the length of stand 12 is about 5 mm. The length of the threaded hole in the upright post 12 is about 5mm, the length of the screw rod 2 is about 25mm, the length of the thread is about 25mm, and the thread is only a common coarse thread, so that the cost is low.

Furthermore, an avoiding through hole is formed in the chuck 11, and the diameter of the avoiding through hole is about 20 mm. Preferably, the chuck 11 and the relief through hole are concentrically arranged, and the cross section of the chuck 11 is in a circular ring structure. The avoidance through hole is arranged right opposite to the threaded hole and used for avoiding the screw rod 2, the situation that the screw rod 2 abuts against the chuck 11 in the feeding process is avoided, the avoidance through hole provides necessary passing space for the screw rod 2, the moving range of the screw rod 2 is increased, and the pre-tightening force adjusting range of the workpiece to be adjusted 200 is enlarged.

In order to realize the detachable connection between the chuck 11 and the workpiece 200 to be adjusted, a first connection hole is provided on the chuck 11, a second connection hole is provided on the workpiece 200 to be adjusted corresponding to the first connection hole, and the connection member 3 connects the transition structure with the workpiece to be adjusted through the first connection hole and the second connection hole. Wherein, one of them is the through-hole structure in first connecting hole and the second connecting hole, and another is the screw hole structure, and connecting piece 3 specifically is the bolt, adopts threaded connection's mode, and the installation is convenient with the dismantlement, and is fixed effectual.

Preferably, the quantity of first connecting hole, second connecting hole and connecting piece 3 is a plurality of, and a plurality of connecting pieces 3 one-to-one wear to locate a plurality of first connecting holes and a plurality of second connecting hole, adopts the mode that a plurality of connecting pieces 3 connect jointly, has further improved fixed effect.

Since there may be a plurality of types of workpieces 200 to be adjusted, in order to ensure the adaptability of the chuck 11 to the workpieces 200 to be adjusted, the spare hole 111 is provided on the chuck 11 corresponding to the second connecting hole, and the connecting member 3 is configured to selectively penetrate through the first connecting hole or the spare hole 111, in other words, the spare hole 111 is additionally provided on the chuck 11 according to the positions of the second connecting holes of the workpieces 200 to be adjusted in various types, and the spare hole 111 serves as an alternative. When the adjusting device is installed, a proper hole position is selected between the first connecting hole and the standby hole 111 for the penetrating installation of the connecting piece 3, the adjusting device is used for matching various types of workpieces 200 to be adjusted, and the universality is high.

Optionally, the number of the spare holes 111 is multiple, and the plurality of spare holes 111 and the plurality of first connecting holes are respectively arranged around the upright post 12 in a surrounding manner, so that the range of selective penetration of the connecting piece 3 is increased, and the flexibility is strong.

Example two

The structure of the present embodiment is similar to that of the present embodiment, and the difference is only that the structure of the main body and the workpiece 200 to be adjusted is different, as shown in fig. 4-5, the main body provided in the first embodiment is a mini excavator, the main body provided in the second embodiment is a bulldozer, the mounting plate of the workpiece 200 to be adjusted provided in the first embodiment is a circular plate structure, and the mounting plate of the workpiece 200 to be adjusted provided in the second embodiment is a square plate structure, so other same contents are not described in detail again.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A pretension adjustment mechanism, characterized in that the pretension adjustment mechanism comprises:

one end of the transition structure (1) is provided with a threaded hole, and the other end of the transition structure (1) is detachably connected to a workpiece (200) to be adjusted;

the screw rod (2) is arranged in the threaded hole in a penetrating mode;

a torque wrench configured to clamp the screw (2) and drive the screw (2) to rotate relative to the transition structure (1) to adjust the pretension of the workpiece (200) to be adjusted.

2. The pretension adjusting mechanism according to claim 1, wherein the transition structure (1) comprises:

a chuck (11), wherein the chuck (11) is detachably connected with the workpiece (200) to be adjusted;

the upright column (12) is convexly arranged on the chuck (11) and is coaxially arranged with the chuck (11), and the threaded hole is formed in the upright column (12) along the axial direction of the upright column.

3. The pretightening force adjusting mechanism according to claim 2, wherein an avoiding through hole is formed in the chuck (11), and the avoiding through hole is opposite to the threaded hole and used for avoiding the screw rod (2).

4. The pretension adjusting mechanism according to claim 3, wherein a first connection hole is provided on the chuck (11), a second connection hole is provided on the workpiece (200) to be adjusted corresponding to the first connection hole, and a connecting member (3) connects the transition structure with the workpiece to be adjusted through the first connection hole and the second connection hole.

5. The pretightening force adjusting mechanism according to claim 4, wherein the number of the first connecting holes, the number of the second connecting holes and the number of the connecting members (3) are all plural, and the connecting members (3) are correspondingly inserted into the plural first connecting holes and the plural second connecting holes one by one.

6. The preload adjustment mechanism according to claim 4, wherein a spare hole (111) is provided on the chuck (11) corresponding to the second connection hole, and the connection member (3) is configured to be selectively inserted through the first connection hole or the spare hole (111).

7. The preload adjustment mechanism according to claim 6, wherein the number of the spare holes (111) is plural, and a plurality of the spare holes (111) and a plurality of the first connection holes are arranged around the column (12).

8. The preload adjustment mechanism according to claim 3, wherein the cross-section of the chuck (11) is of a circular ring configuration.

9. The preload adjustment mechanism according to claim 2, wherein said chuck (11) and said column (12) are connected by welding.

10. An engineering machine, characterized by comprising a main machine and the pretightening force adjusting mechanism of any one of claims 1 to 9, wherein the hydraulic oil tank (100) of the main machine is provided with a workpiece (200) to be adjusted, and the pretightening force adjusting mechanism is used for adjusting the pretightening force of the workpiece (200) to be adjusted.