Efficient dismounting device of connecting rod nut from stud

Abstract

The utility model provides a high -efficient dismounting device of connecting rod nut from the stud, the base is the groove type seat of notched upward arrangement, is equipped with the rotary device of rotating portion in the recess in the base, the lower end of cylindrical body is detachable fixed connection with the rotating portion of rotary device, and the upper end fixed with rubber sleeve of cylindrical body is driven to rotate by rotary device, is equipped with the diameter reducing and expanding drive arrangement on the base, the circumference of a number of moving parts of diameter reducing and expanding drive arrangement is guided and is installed on the upper end of base, the inner end part of the upper end surface of moving part of diameter reducing and expanding drive arrangement is fixed with sleeve, the lower end of stud is detachable fixed in sleeve, and under the drive of diameter reducing and expanding drive arrangement makes the nut of adapting to stud contact or separate with rubber sleeve. The utility model realizes a plurality of stud nut synchronous dismounting, solves the problem of low efficiency, great labor intensity, poor adaptability of batch production in traditional dismounting mode of connecting rod stud nut, improves the dismounting efficiency of nut and stud, is suitable for batch production of connecting rod.

Description

Technical Field

[0001] This utility model belongs to the field of diesel engine technology, specifically relating to an efficient device for removing connecting rod nuts from studs. Background Technology

[0002] Connecting rods are the core components of diesel engine power transmission, and their performance directly affects the stability and reliability of the entire engine. They mainly consist of the rod body, connecting rod cap, studs, nuts, large-end bearings, and small-end bushings. The rod body and connecting rod cap are securely connected by multiple high-strength studs and matching nuts, ensuring no loosening or deviation during power transmission. During the machining (such as precision testing and surface treatment) and assembly processes of diesel engine connecting rods, the connecting rod studs need to be repeatedly disassembled due to process adjustments and quality inspection requirements. Therefore, the efficiency and convenience of disassembly are crucial to the production process.

[0003] After the hydraulic tensioner completes the pressure relief operation, the traditional disassembly method requires manual operation. This involves removing the nuts one by one, then removing the studs, and repeating this process in reverse during installation. This is not only cumbersome but also time-consuming, severely hindering production efficiency. To address this issue, the existing solution is to remove the stud-nut assembly as a whole during disassembly. However, this method still has significant drawbacks: both manual individual disassembly and overall disassembly require group-by-group operation, forcing workers to continuously repeat a single action, resulting in high labor intensity. Furthermore, the single-group operation mode leads to slow process speed, causing parts to accumulate at this stage and preventing timely transfer to the next processing or assembly stage. Especially in mass production scenarios, this can easily cause production delays, making it difficult to meet the demands of efficient and large-scale production. Therefore, to solve the problems of low disassembly efficiency and high labor intensity of connecting rod stud-nuts, improvements are necessary. Utility Model Content

[0004] The technical problem solved by this utility model is to provide an efficient device for disassembling connecting rod nuts from studs. This device employs a rotary mechanism on a base for driving the cylinder to rotate and a diameter-reducing / expanding drive mechanism for driving the studs to move inwards or outwards. With the nut on the stud in contact with the rubber sleeve at the upper end of the cylinder, the rotating cylinder drives the disassembly of multiple nuts and studs. This solves the problems of low efficiency, high labor intensity, and poor adaptability to mass production in traditional connecting rod stud nut disassembly methods. It enables the simultaneous disassembly of multiple stud nuts, greatly improving the efficiency of nut and stud disassembly, saving manpower and resources, and avoiding accidents such as collisions during nut disassembly. It is suitable for mass production of connecting rods.

[0005] The technical solution adopted by this utility model is: a high-efficiency disassembly device for connecting rod nuts from studs, including a support base on a working platform and a base coaxially fixed to the upper end of the support base. The base is a slotted seat with the slot facing upward. A rotary device with a rotating part located in the central groove is provided on the base, and the lower end of the cylinder is detachably fixed to the rotating part of the rotary device. The rotary device drives the cylinder with a rubber sleeve fixed to its upper end to rotate. A diameter expansion and contraction drive device is provided on the base, and multiple moving parts of the diameter expansion and contraction drive device are circumferentially guided and installed on the upper end of the base. A sleeve is fixed to the inner end of the upper surface of the moving part of the diameter expansion and contraction drive device, and the lower end of the stud is detachably fixed in the sleeve. Under the drive of the diameter expansion and contraction drive device, the nut adapted to the stud contacts or separates from the rubber sleeve.

[0006] The rotary device includes a rotary bearing and a motor. The rotary bearing is located in a groove in the middle of the base, and the outer ring of the rotary bearing is fixed to the groove surface of the base. The lower end of the cylinder is fixedly connected to the inner ring of the rotary bearing. The motor is located in the support base and fixed to the bottom surface of the base. The output shaft of the motor passes through the base and is fixedly connected to a gear. The gear meshes with the teeth of the inner ring of the rotary bearing and drives the lower cylinder to rotate in both directions.

[0007] Furthermore, the cylinder is an inverted T-shaped cylinder, and the lower end of the cylinder is fixedly connected to the inner ring of the slewing bearing by a plurality of bolts evenly distributed around the circumference.

[0008] Furthermore, the diameter expansion and contraction drive device includes a movable plate and a second motor. The upper end face of the base has an annular groove located on the outer periphery of the central groove, and the inner ring of the first rotary bearing located in the annular groove is fixed to the groove surface. The base has multiple guide grooves evenly distributed along its radial direction and located on the upper edge of the inner and outer rings of the annular groove. The bottom guide of the movable plate with a rack on its lower side wall is adapted to fit in the guide groove. The second motor is fixed to the bottom surface of the base. The output shaft of the second motor passes through a hole on the base and is fixedly connected to the second gear located in the annular groove. The second gear meshes with the teeth of the outer ring of the first rotary bearing. The same number of small gears as the movable plate are rotatably installed in the annular groove, and the small gears mesh with the racks on the movable plate at the corresponding positions. The sleeve is fixed to the inner part of the upper end face of the movable plate. When the second motor drives the outer ring of the first rotary bearing to rotate clockwise or counterclockwise, the multiple movable plates drive the sleeves on them to move outward or inward synchronously.

[0009] Furthermore, a set screw is threaded onto the outer wall of the sleeve, and by rotating the set screw, its end is pressed against the rubber sleeve at the lower end of the stud, thereby achieving a detachable fixed connection between the stud and the sleeve.

[0010] Furthermore, the rubber sleeve is made of fluororubber or silicone rubber.

[0011] Advantages of this utility model compared to the prior art: 1. Based on the stud model, this technical solution uses a diameter reduction and expansion drive device to enable multiple sets of studs to move synchronously inward or outward so that the nuts on them contact and position with the rubber sleeve at the top of the cylinder. In conjunction with the rotary device used to drive the cylinder to rotate, the nuts are tightened or loosened synchronously. This simplifies the disassembly process of a single connecting rod from multiple steps and group operations to multiple groups of simultaneous disassembly, which greatly shortens the time required to disassemble a single connecting rod. 2. This technical solution addresses the studs and nuts of different connecting rods by synchronously adjusting the distance between the sleeve and the cylinder through the motor-driven moving plate. This allows the nuts on multiple studs to contact the rubber sleeve at the top of the cylinder, providing conditions for the cylinder to drive the multiple nuts to rotate. 3. In this technical solution, after the rubber sleeve is fitted on the lower end of the stud, it is detachably fixed to the sleeve with a set screw. The elasticity of the rubber sleeve can avoid thread scratches caused by rigid contact between the sleeve and the stud. At the same time, when the rubber sleeve drives the nut to rotate, it can buffer the rotational impact force through its own deformation, reducing thread damage at the moment of engagement between the nut and the stud. Moreover, when replacing studs of different specifications, there is no need to replace the entire sleeve, thus increasing the range of applications. 4. The rotary device in this technical solution drives the cylinder to rotate at a uniform speed through the precise transmission of motor one and gear one. It utilizes the friction between the rubber sleeve and the nut to provide conditions for tightening or loosening the nut. The tightening torque is uniform, realizing the automatic disassembly and installation of the nut. The structure is simple and reliable, saves manpower and material resources, and is highly practical. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention without the studs and nuts installed; Figure 3 This is a schematic diagram of the planar structure of this utility model; Figure 4 for Figure 3 Sectional view of AA. Detailed Implementation

[0013] The following will be based on the embodiments of this utility model. Figure 1-4 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0016] A highly efficient device for removing the connecting rod nut from the stud, such as Figure 1-4 As shown, the system includes a support base 1 mounted on a working platform and a base 2 coaxially fixed to the upper end of the support base 1. The base 2 is a slotted seat with the slot facing upwards. A rotating device with its rotating part located within a central groove is provided on the base 2. The lower end of a cylinder 3 is detachably fixed to the rotating part of the rotating device, and the rotating device drives the cylinder 3, whose upper end is fixed with a rubber sleeve 4, to rotate. A diameter-reduction / expansion driving device is provided on the base 2, and multiple moving parts of the diameter-reduction / expansion driving device are circumferentially guided and mounted on the upper end of the base 2. A sleeve 5 is fixed to the inner end of the upper surface of the moving part of the diameter-reduction / expansion driving device, and the lower end of a stud 6 is detachably fixed inside the sleeve 5. Under the drive of the diameter-reduction / expansion driving device, the stud 6 is adapted to the screw... The nut 7 on the stud 6 contacts or separates from the rubber sleeve 4. In the above structure, a rotary device for driving the cylinder 3 to rotate and a diameter-reducing drive device for driving the stud 6 to move inward or outward are set on the base 2. When the nut 7 on the stud 6 contacts the rubber sleeve 4 at the upper end of the cylinder 3, the rotating cylinder 3 drives the disassembly of multiple nuts 7 on the stud 6. This solves the problems of low efficiency, high labor intensity and poor adaptability to mass production in the traditional disassembly method of connecting rod stud nuts. It realizes the synchronous disassembly of multiple stud nuts, which greatly improves the disassembly efficiency of nuts and studs, saves manpower and material resources, and avoids accidental situations such as bumps when disassembling the nut 7. It is suitable for mass production of connecting rods.

[0017] The specific structure of the slewing device is as follows: The slewing device includes a slewing bearing 8 and a motor 9. The slewing bearing 8 is located in a groove in the middle of the base 2, and the outer ring of the slewing bearing 8 is fixed to the groove surface of the base 2. The lower end of the cylinder 3 is fixedly connected to the inner ring of the slewing bearing 8. The motor 9 is located in the support 1 and fixed to the bottom surface of the base 2. The output shaft of the motor 9 passes through the base 2 and is fixedly connected to a gear 10, and the gear 10 meshes with the teeth of the inner ring of the slewing bearing 8. The cylinder 3 is rotated in both directions by a motor 9. Specifically, the cylinder 3 is an inverted T-shaped column, and the lower end of the cylinder 3 is fixedly connected to the inner ring of the slewing bearing 8 by multiple bolts evenly distributed around its circumference. The slewing device drives the cylinder 3 to rotate at a uniform speed through the precise transmission of the motor 9 and the gear 10. The friction between the rubber sleeve 4 and the nut 7 provides conditions for tightening or loosening the nut 7 on the stud 6. The tightening torque is uniform, realizing the automatic disassembly and installation of the nut 7.

[0018] The specific structure of the diameter reduction and expansion drive device is as follows: The diameter reduction and expansion drive device includes a moving plate 11 and a second motor 12. The upper end face of the base 2 is provided with an annular groove 13 located on the outer periphery of the central groove, and the inner ring of the first rotary bearing 17 located in the annular groove 13 is fixed to the groove surface of the annular groove 13. The base 2 is circumferentially distributed with multiple guide grooves 15 that are radially distributed and located on the upper edge of the inner and outer rings of the annular groove 13. The bottom guide of the moving plate 11, which has a rack 16 on its lower side wall, is adapted to fit in the guide groove 15. The second motor 12 is fixed to the bottom surface of the base 2. The output shaft of the second motor 12 passes through a hole on the base 2 and is fixedly connected to the second gear 19 located in the annular groove 13. The second gear 19 meshes with the teeth of the outer ring of the first rotary bearing 17. The same number of small gears 14 as the moving plate 11 are rotatably installed in the annular groove 13, and the small gears 14 mesh with the racks 16 on the moving plate 11 at the corresponding positions. The sleeve 5 is fixed. Inside the upper surface of the movable plate 11, and driven by the second motor 12 to rotate the outer ring of the rotary bearing 17 clockwise or counterclockwise, multiple movable plates 11 drive the sleeves 5 on them to move synchronously outward or inward. In the above structure, according to the model of the stud 6, the expansion and contraction drive device enables multiple sets of studs 6 to move synchronously inward or outward so that the nuts 7 on them contact and position with the rubber sleeves 4 at the upper end of the cylinder 3. With the help of the rotary device used to drive the rotation of the cylinder 3, the nuts 7 are tightened or loosened synchronously. The disassembly process of a single connecting rod is simplified from multi-step operation to multi-group synchronous disassembly, which greatly shortens the disassembly time of a single connecting rod. For studs 6 and nuts 7 of different connecting rods, it is only necessary to drive the movable plate 11 of the second motor 12 to synchronously adjust the distance between the sleeves 5 and the cylinder 3, so that the nuts 7 on multiple studs 6 can contact the rubber sleeves 4 at the upper end of the cylinder 3, providing conditions for the cylinder 3 to drive multiple nuts 7 to rotate. The sleeve 5 is threaded with a set screw 18 on its outer wall. By rotating the set screw 18, its end is pressed against the rubber sleeve at the lower end of the stud 6, thus achieving a detachable connection between the stud 6 and the sleeve 5. Specifically, the rubber sleeve is made of fluororubber or silicone rubber. In the above structure, after the rubber sleeve is fitted at the lower end of the stud 6, it is detachably connected to the sleeve 5 by the set screw 18. The elasticity of the rubber sleeve can prevent thread scratches caused by rigid contact between the sleeve 5 and the stud 6. At the same time, when the rubber sleeve 4 drives the nut 7 to rotate, it can buffer the rotational impact force through its own deformation, reducing thread damage at the moment of engagement between the nut 7 and the stud 6. Furthermore, when replacing studs 6 of different specifications, there is no need to replace the entire sleeve 5, thus increasing its applicability. This technical solution has a simple and reliable structure. The overall disassembly of the studs 6 and nuts 7 and the assembly of the studs 6 and nuts 7 that exist separately before installation are convenient and quick. Multiple nuts 7 can be disassembled at one time, avoiding backlog in this process and providing conditions for quickly moving to the next process. It saves manpower and resources, is highly practical, and can be applied to other situations where nuts are disassembled and installed.

[0019] Work process: 1) When the lower end of the stud 6 is fixedly connected to the sleeve 5, and the nut 7 needs to be installed on the stud 6 (the nut 7 needs to be put on the upper end of the stud 6 beforehand) or the nut 7 needs to be removed from the stud 6, start the motor 2 12. The motor 2 12 drives the gear 2 19 to rotate. The gear 2 19 drives the outer ring of the slewing bearing 17 to rotate, which in turn drives the small gear 14 in the annular groove 13 to rotate synchronously. The small gear 14 drives multiple sets of moving plates 11 to move synchronously inward or outward along the guide groove 15 through meshing with the rack 16 of the moving plate 11, until the nut 7 on the sleeve 5 drives the stud 6 to contact the rubber sleeve 4 on the cylinder 3, and then turn off the motor 2 12. 2) Start motor 9. Motor 9 drives gear 10 to rotate. Gear 10 drives the inner ring of slewing bearing 8 to rotate, which in turn drives cylinder 3 and rubber sleeve 4 to rotate. After rubber sleeve 4 contacts nut 7, it drives nut 7 to rotate along the axial direction of stud 6 and move upward or downward until nut 7 is removed or tightened in place. Then turn off motor 9. Rotate set screw 18 on sleeve 5 to loosen the fixation of rubber sleeve at the lower end of stud 6. Start motor 12 to make moving plate 11 drive sleeve 5 to move outward and disengage from stud 6, completing the installation.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0021] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A highly efficient device for removing the connecting rod nut from the stud, characterized in that: It includes a support base (1) on the working platform and a base (2) coaxially fixed to the upper end of the support base (1). The base (2) is a slotted seat with the slot facing upward. The base (2) is provided with a rotating device whose rotating part is located in the middle groove. The lower end of the cylinder (3) is detachably fixed to the rotating part of the rotating device. The cylinder (3) with a rubber sleeve (4) fixed at the upper end is driven by the rotating device to rotate. The base (2) is provided with a diameter expansion and contraction drive device. Multiple moving parts of the diameter expansion and contraction drive device are circumferentially guided and installed on the upper end of the base (2). The inner end of the upper surface of the moving part of the diameter expansion and contraction drive device is fixed with a sleeve (5). The lower end of the stud (6) is detachably fixed in the sleeve (5). Under the drive of the diameter expansion and contraction drive device, the nut (7) adapted to the stud (6) is made to contact or separate from the rubber sleeve (4).

2. The efficient disassembly device for the connecting rod nut from the stud according to claim 1, characterized in that: The rotary device includes a rotary bearing (8) and a motor (9). The rotary bearing (8) is located in the groove in the middle of the base (2), and the outer ring of the rotary bearing (8) is fixed to the groove surface of the base (2). The lower end of the cylinder (3) is fixedly connected to the inner ring of the rotary bearing (8). The motor (9) is located in the support seat (1) and fixed to the bottom surface of the base (2). The output shaft of the motor (9) passes through the base (2) and is fixedly connected to the gear (10). The gear (10) meshes with the teeth of the inner ring of the rotary bearing (8) and is driven by the motor (9) to rotate the cylinder (3) in both directions.

3. The efficient disassembly device for the connecting rod nut from the stud according to claim 2, characterized in that: The cylinder (3) is an inverted T-shaped cylinder, and the lower end of the cylinder (3) is fixedly connected to the inner ring of the slewing bearing (8) by a plurality of bolts evenly distributed around the circumference.

4. The efficient disassembly device for the connecting rod nut from the stud according to claim 1, characterized in that: The expansion and contraction drive device includes a moving plate (11) and a second motor (12). The upper end face of the base (2) is provided with an annular groove (13) located on the outer periphery of the central groove. The inner ring of the first rotary bearing (17) located in the annular groove (13) is fixed to the groove surface of the annular groove (13). The base (2) is circumferentially distributed with multiple guide grooves (15) that are radially distributed and located on the upper edge of the inner and outer rings of the annular groove (13). The bottom guide of the moving plate (11) with a rack (16) on its lower side wall is adapted to fit in the guide groove (15). The second motor (12) is fixed to the bottom surface of the base (2). The output shaft of the second motor (12) passes through the base. The hole on the seat (2) is fixedly connected to the gear two (19) located in the annular groove (13), and the gear two (19) meshes with the teeth of the outer ring of the slewing bearing one (17). The annular groove (13) is rotatably installed with the same number of small gears (14) as the moving plate (11), and the small gears (14) mesh with the rack (16) on the moving plate (11) at the corresponding position. The sleeve (5) is fixed inside the upper end face of the moving plate (11), and under the clockwise or counterclockwise rotation of the outer ring of the slewing bearing one (17) driven by the motor two (12), multiple moving plates (11) drive the sleeves (5) on them to move outward or inward synchronously.

5. The efficient disassembly device for the connecting rod nut from the stud according to claim 1, characterized in that: The sleeve (5) has a threaded connection to a set screw (18) on its outer wall. By rotating the set screw (18), its end is pressed against the rubber sleeve at the lower end of the stud (6), thus achieving a detachable connection between the stud (6) and the sleeve (5).

6. The efficient disassembly device for the connecting rod nut from the stud according to claim 5, characterized in that: The rubber sleeve is made of fluororubber or silicone rubber.

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