CN103909486B - High pressure oil pipe nut tightening wrench - Google Patents

Abstract

The invention discloses a kind of high-pressure oil pipe nut screwing clamping spanner.This spanner comprises: jockey and tappet head, and jockey comprises: Connection Block and the bevel gear be located in Connection Block; Tappet head comprises: base and be arranged on bevel gear scroll bar pair, turbine spur gear pair, the idler gear in base and tighten gear, and base is connected with Connection Block is rotating; Bevel gear scroll bar pair comprises: coaxial scroll bar cone tooth and scroll bar; The central axis of turbine spur gear pair and bevel gear scroll bar pair is set to 90 degrees, and comprise: coaxial turbine and spur gear, bevel gear and scroll bar are bored tooth and are engaged, scroll bar engages with turbine, spur gear is driven by idler gear and tightens gear, the inside of tightening gear offers sleeve, and sleeve is provided with sleeve openings groove.This high-pressure oil pipe nut screwing clamping spanner structure advantages of simple, easy and simple to handle, rotated relative to tappet head by jockey, the part avoiding high-pressure oil pipe surrounding is interfered, and that can improve high-pressure oil pipe nut screwing clamping tightens efficiency.

Description

High pressure oil pipe nut tightening wrench

technical field

The invention relates to the field of tightening wrenches, in particular to a high-pressure oil pipe nut tightening wrench.

Background technique

At present, when tightening the high-pressure oil pipe nut during the engine assembly process, because there is a high-pressure oil pipe in the middle of the nut, ordinary tools such as sockets and ring wrenches cannot be inserted into the high-pressure oil pipe nut, so general-purpose tools such as sockets cannot be used for fast tightening. Generally, the following Tighten in two ways: ①Tighten by hand with an open end wrench and then use a constant torque wrench to retighten the torque. Due to the interference of the surrounding parts, when the high-pressure oil pipe of some engines is tightened, the open-end wrench can only turn the nut at an angle of less than 90° each time, and a nut needs to be tightened repeatedly. The wrench tightens the nut, and its torque accuracy is uncontrollable. After tightening, it needs to be tightened again with a torque control wrench to ensure that the tightening torque of the nut meets the process requirements; An electric wrench that automatically tightens the high-pressure oil pipe nut. Due to the influence of the shape of the high-pressure oil pipe of the engine and the interference of the surrounding parts, this type of open-ended wrench can only tighten the high-pressure oil pipe nut of a small number of engines. When the high-pressure oil pipe nut of some engines is tightened, the high-pressure oil pipe The parts next to it are higher than the nut of the high-pressure oil pipe, and interfere with the rear part of the wrench, so that the wrench cannot be inserted into the nut of the high-pressure oil pipe.

When the production cycle of the engine is high, the use of ordinary open-end wrenches cannot meet the production cycle requirements due to low efficiency, and the open-ended electric tool cannot meet the high-pressure oil pipe tightening of various types of engines due to the interference between the rear part of the wrench and the parts around the high-pressure oil pipe. , the operation time is long, the production efficiency is low, and the process of tightening the high-pressure oil pipe of the engine is often the production bottleneck in the engine assembly process.

Contents of the invention

The present invention aims at overcoming the defects in the above-mentioned prior art, and provides a safe and reliable high-pressure oil pipe nut tightening wrench with simple and reasonable structure, easy operation, which can meet the tightening needs of high-pressure oil pipes of various types of engines.

In order to achieve the above object, the present invention provides a high-pressure oil pipe nut tightening wrench, including: a connecting device and a tightening head, the connecting device includes: a connecting seat and a bevel gear passing through the connecting seat; the tightening head includes: a base and a setting The bevel gear worm pair, the worm gear pair, the intermediate gear and the tightening gear in the base, the base and the connecting seat are rotatably connected; the bevel gear worm pair includes: coaxial worm bevel gear and worm gear; the worm gear The pair and the central axis of the bevel gear and worm pair are set at 90°, and include: a coaxial worm gear and a spur gear, the bevel gear meshes with the worm gear, the worm meshes with the worm gear, and the spur gear drives the tightening gear through the intermediate gear. A sleeve is opened inside the gear, and the sleeve is provided with a sleeve opening groove.

In the above technical solution, the base and the connecting seat are rotatably connected through pin shafts.

In the above technical solution, there are two intermediate gears, which are engaged with the tightening gear respectively.

In the above technical solution, the bevel gear is installed in the connecting seat through the needle bearing and the thrust bearing.

In the above technical solution, a washer and a snap ring are also arranged on the bevel gear.

In the above technical solution, the sleeve is a hexagonal sleeve.

In the above technical solution, the bevel gear and worm pair are installed in the base through angular bearings.

Compared with the prior art, the present invention has the following beneficial effects: the high-pressure oil pipe nut tightening wrench has a simple and reasonable structure, and is easy to operate. The connecting device rotates relative to the tightening head, and when the tightening head clamps the high-pressure oil pipe nut, it avoids surroundings of the high-pressure oil pipe Parts interference, and then meet the tightening of high-pressure oil pipe nuts of various types of engines, safe and reliable, and can improve the tightening efficiency of high-pressure oil pipe nuts.

Description of drawings

Fig. 1 is the front view sectional structure schematic diagram of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 2 is a side view sectional structure schematic diagram of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 3 is a front view sectional structure schematic diagram of the connection seat of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 4 is a schematic cross-sectional structural diagram of the D-D direction of Fig. 3;

Fig. 5 is a schematic diagram of the structure in the C direction of Fig. 3;

Fig. 6 is a schematic diagram of the structure in the E direction of Fig. 3;

Fig. 7 is a front structural schematic view of the upper base of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 8 is a schematic cross-sectional structural view of the F-F direction of Fig. 7;

Fig. 9 is a schematic cross-sectional structural diagram of the G-G direction of Fig. 7;

Fig. 10 is a schematic cross-sectional structural view of the H-H direction of Fig. 7;

Fig. 11 is a schematic diagram of the I-direction structure of Fig. 7;

Fig. 12 is a schematic front view of the lower base of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 13 is a schematic cross-sectional structure diagram of the J-J direction of Fig. 12;

Fig. 14 is a schematic cross-sectional structure diagram of the K-K direction of Fig. 12;

Fig. 15 is a schematic cross-sectional structure diagram of the L-L direction of Fig. 12;

Fig. 16 is a schematic diagram of the M direction of Fig. 12;

Fig. 17 is a schematic front view of the bevel gear of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 18 is a schematic side view of the bevel gear of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 19 is a schematic diagram of the assembly side structure of the bevel gear worm pair and the turbine spur gear pair of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 20 is a schematic diagram of the assembly front view of the bevel gear worm pair and the turbine spur gear pair of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 21 is a front structural schematic view of the tightening gear of the high-pressure oil pipe nut tightening wrench of the present invention;

Fig. 22 is a schematic cross-sectional structural diagram of the N-N direction of Fig. 21;

Fig. 23 is a schematic side view of the tightening gear of the high-pressure oil pipe nut tightening wrench of the present invention.

detailed description

A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment. It should be understood that the "upper", "lower", "left", "right", "front" and "reverse" mentioned in the following embodiments of the present invention are all based on the directions shown in the figures, These words used to limit the direction are only for convenience of description, and do not mean to limit the specific technical solution of the present invention.

The high-pressure oil pipe nut tightening wrench of the present invention is designed with a connecting device and a tightening head that can rotate with each other, the tightening head is clamped with the high-pressure oil pipe nut to be tightened, and the driving device drives the tightening head to rotate through the connecting device to tighten the high-pressure oil pipe nut. The relative rotation of the tightening head can avoid the interference of parts around the high-pressure oil pipe when the tightening head clamps the high-pressure oil pipe nut, which can meet the tightening of high-pressure oil pipe nuts of various types of engines, expand the application range of the tightening wrench, and improve the high-pressure oil pipe. Nut tightening efficiency and automation.

As shown in Figure 1 and Figure 2, the specific structure of the high-pressure oil pipe nut tightening wrench includes: a connecting device located at the upper part and a tightening head located at the lower part, the connecting device is used to transmit the power of the driving device to the tightening head, and the screw is tightened through the tightening head The high-pressure oil pipe nut is rotated relative to the tightening head by the connecting device to avoid the interference of parts around the high-pressure oil pipe, thereby satisfying the tightening of the high-pressure oil pipe nut of various types of engines.

As shown in Figures 3 to 6, the connection device includes: a connection base 1 and a bevel gear 2, and the installation cavity of the connection base 1 includes from top to bottom: a drive device interface 11, a bevel gear installation cavity 12 and a tightening head installation Cavity 13. The drive device interface 11 is provided with an internal thread for mating connection with an external drive device. The bevel gear installation cavity 12 includes: a needle roller bearing installation hole 121 at the top and a thrust bearing installation hole 122 at the bottom, the needle roller bearing installation hole 121 and the thrust bearing installation hole 122 are respectively provided with a needle bearing 14, a stop The push bearing 15 is used to pass through the bevel gear 2 . The tightening head installation cavity 13 is surrounded by cross-walls 131 extending downwards on the left and right sides of the connection base 1 , and the lower parts of the two cross-walls 131 are symmetrically provided with connection seat pin holes 132 .

As shown in Figure 17 and Figure 18, the front end of the bevel gear 2 is provided with a bevel gear bevel tooth 21, and the middle is respectively provided with a spring groove 22, a needle roller bearing installation journal 23, a thrust bearing installation journal 24, and a rear end A hexagonal connecting rod 25 is provided, and the needle roller bearing installation journal 23 and the thrust bearing installation journal 24 of the bevel gear 2 are installed on the inner rings of the needle roller bearing 14 and the thrust bearing 15 respectively, and the ring groove 22 A washer 221 and a circlip 222 are provided to fix and limit the position of the bevel gear 2 to prevent the bevel gear 2 from moving up and down. Teeth 21 are engaged with the worm bevel teeth of the bevel gear and worm pair of the tightening head to connect and drive.

The tightening head includes: an upper base 3, a lower base 4, a bevel gear worm gear pair 5, a turbine spur gear pair 6, an intermediate gear 7 and a tightening gear 8. Wherein, as shown in Fig. 7 to Fig. 16, the upper base 3 and the lower base 4 are interlocked to form the upper base pin hole 31, the lower base pin hole 41 and the angular bearings located on the upper left and right sides. The upper base angular bearing mounting hole 32 of the mounting hole, the lower base angular bearing mounting hole 42, and the upper base tightening gear mounting hole 33 located in the bottom tightening gear mounting hole, the lower base tightening gear mounting hole 43, and the upper base tightening gear mounting hole 33 Tighten the bottom of the gear mounting hole 43 with the lower base to be respectively provided with an upper base opening groove 34 and a lower base opening groove 44, and an angular bearing 36 is respectively housed in the angular bearing mounting hole. The upper base of the upper base 3 tightens the top of the gear mounting hole 33 and also offers a turbo spur gear pair mounting hole 35, and the left and right sides of the lower base of the lower base 4 tighten the gear mounting hole 43 top and also offers an intermediate gear mounting hole 45 respectively. The upper base 3 and the lower base 4 top are respectively passed through the base pin hole and the connecting seat pin hole 132 of the connecting seat 1 through the pin shaft 91 to form a rotatable pin connection, and the bottom is supported and connected by the bolt 92 .

As shown in Figure 19 and Figure 20, the bevel gear worm pair 5 includes: the angular bearing installation journals 51 at both ends and the worm bevel teeth 52 and worm 53 in the middle, and the angular bearing installation journals 51 at both ends are respectively installed on the Between the inner rings of the two angular bearings 36, the two angular contact bearings fix the position of the bevel gear worm pair, preventing the bevel gear worm pair from moving left and right under force when the bevel gear worm pair rotates, and the worm bevel teeth 52 mesh with the bevel gear bevel teeth 21 .

Turbine spur gear pair 6 is set at 90° to the central axis of bevel gear worm gear pair 5, including: coaxial front-end worm gear 61 and rear-end spur gear 62, worm gear 61 meshes with worm rod 53, so that the gear rotation direction is changed by 90° °. The spur gear 62 is meshed with two intermediate gears 7, and the two intermediate gears 7 are meshed with the tightening gear 8 respectively. The two intermediate gears 7 and the tightening gear 8 are meshed and connected in a "two-to-one" manner, which can ensure stable transmission sex and reliability.

As shown in Fig. 21 to Fig. 23, there is a hexagonal sleeve 81 inside the tightening gear 8, and the hexagonal sleeve 81 is provided with a sleeve opening groove 82, and the hexagonal sleeve 81 is used for clamping the high-pressure oil pipe nut to be tightened. When the sleeve opening groove 82 of the hexagonal sleeve 81 is in the same direction as the upper base opening groove 34 and the lower base opening groove 44, the hexagonal sleeve 81 passes through the high-pressure oil pipe and engages with the high-pressure oil pipe nut to be tightened, and the driving device rotates At the same time, through the transmission of the bevel gear worm pair 5, the turbine spur gear pair 6, and the intermediate gear 7, the tightening gear 8 is finally driven to rotate and screw the high-pressure oil pipe nut, thereby realizing the tightening of the high-pressure oil pipe nut, and the tightening torque of the nut is controlled by the driving device The accuracy of its torque, after tightening, lift the wrench and use the tightening sleeve to leave the nut, the driving device controls the tightening gear to automatically reverse, the tightening head and the slot on the tightening gear turn to the same direction, and then the tightening wrench is removed from the high-pressure oil pipe nut remove. When the parts of the engine interfere with the wrench for tightening the high-pressure oil pipe nut, the upper connecting seat of the wrench can swing upwards at an angle, effectively avoiding the interfering parts and tightening.

The high-pressure oil pipe nut tightening wrench has a simple and reasonable structure and is easy to operate. It rotates relative to the tightening head through the connecting device. The tightening of the nut is safe and reliable, and the tightening efficiency of the high-pressure oil pipe nut can be improved.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (7)

1. A high-pressure oil pipe nut tightening wrench, characterized in that it includes: a connecting device and a tightening head, and the connecting device includes: a connecting seat and a bevel gear passing through the connecting seat; the tightening head includes: a base And the bevel gear worm pair, worm gear spur gear pair, intermediate gear and tightening gear arranged in the base, the base is rotatably connected with the connecting seat; the bevel gear worm pair includes: coaxial worm bevel gear and the worm; the worm spur gear pair and the central axis of the bevel gear worm pair are set at 90°, the worm gear spur gear pair includes: a coaxial worm wheel and a spur gear, the bevel gear meshes with the worm bevel teeth, and the worm Meshing with the worm gear, the spur gear drives the tightening gear through the intermediate gear, and a sleeve is opened inside the tightening gear, and the sleeve is provided with a sleeve opening groove. 2. The high-pressure oil pipe nut tightening wrench according to claim 1, characterized in that: the base and the connecting seat are rotatably connected by pin shafts. 3. The high-pressure oil pipe nut tightening wrench according to claim 1, characterized in that: there are two intermediate gears, which are engaged with the tightening gears respectively. 4. The high-pressure oil pipe nut tightening wrench according to claim 1, characterized in that: the bevel gear is installed in the connecting seat through a needle bearing and a thrust bearing. 5. The high-pressure oil pipe nut tightening wrench according to claim 1, characterized in that: the bevel gear is also provided with a washer and a retaining ring. 6. The high-pressure oil pipe nut tightening wrench according to claim 1, wherein the sleeve is a hexagonal sleeve. 7. The high-pressure oil pipe nut tightening wrench according to any one of claims 1 to 6, characterized in that: the bevel gear and worm pair are installed in the base through angular bearings.