Adjustable clamp for connecting rod boring finish machining

Abstract

The invention discloses an adjustable clamp for connecting rod boring finish machining, and belongs to the technical field of connecting rod boring machining, the adjustable clamp comprises a rotating seat, one side of the front face of the rotating seat is rotatably connected with a clamping part, a connecting rod is fixedly clamped on the clamping part, and the front face of the rotating seat is rotatably connected with a balancing weight through a second rotating shaft. By arranging the synchronizing mechanism, the balancing weight can be driven to synchronously rotate by 180 degrees in the same direction in the process of changing the reducer positions of the connecting rod, so that the gravity center of the balancing weight is symmetrically changed by taking the axis of the rotating shaft II as the axis, and then the balancing weight is ensured to rotate by 180 degrees after the reducer positions of the connecting rod are changed. The common gravity center of the clamping part and the connecting rod and the gravity center of the balancing weight are always symmetrical about the axis of the rotating base, uniform distribution of the mass of the clamp is facilitated, centrifugal force generated during rotation counteracts in all directions, shaking is reduced, and then the surface quality and size precision of a connecting rod boring hole are improved.

Description

Technical Field

[0001] The invention relates to the technical field of connecting rod boring processing, in particular to an adjustable clamp used for finishing boring of connecting rods. Background Art

[0002] The connecting rod is the part of a piston engine that connects the piston to the crankshaft. It transmits the force acting on the piston to the crankshaft, converting the piston's reciprocating motion into rotational motion. The connecting rod consists of three parts: the part that connects to the piston pin is called the connecting rod head; the part that connects to the crankshaft is called the connecting rod head; and the rod connecting the small and big ends is called the connecting rod shaft. The circular holes in the small and big ends of the connecting rod require boring. There are two main methods for boring connecting rods: with the workpiece rotating (the boring tool does not rotate) and with the workpiece fixed (the boring tool rotates).

[0003] The workpiece rotates (lathe / turning center principle), the connecting rod to be processed is clamped on the rotating seat (rotation), and the boring tool is fixed to the tool holder (linear feed). The two holes are completed in one clamping, with excellent concentricity and continuous rotation cutting. The feed is stable, the processing efficiency is high, the cutting is continuous, the vibration is small, the surface quality of the connecting rod boring is high, and the complexity requirement of the tool is low (a single-edge boring tool is sufficient). This is a typical application scenario suitable for mass production of automobile engine connecting rods.

[0004] When the workpiece is rotated (the boring tool does not rotate) to perform finishing boring on the connecting rod, a rotary fixture (composed of a rotating seat and a clamping part) is required to stably clamp the connecting rod and drive it to rotate, and cooperate with the boring tool with linear feed to complete the boring of the connecting rod reducer. Most of the rotary fixtures currently on the market have the function of adjusting the position of the connecting rod to facilitate the processing of the connecting rod reducer, so as to switch the connecting rod reducer to be coaxial with the axis of the rotating seat so as to bore the connecting rod reducer. In this way, the clamping part and the connecting rod have to be eccentrically arranged on the rotating seat, resulting in the center of gravity of the rotating fixture not coinciding with the center of rotation, generating centrifugal force, and causing the rotating fixture to vibrate violently. In order to minimize the vibration of the rotating fixture during operation, it is necessary to set a counterweight on the rotating seat, and the counterweight is symmetrically distributed with the clamping part around the axis of the rotating seat.

[0005] However, most of the counterweights on the rotating clamps in the prior art are fixedly installed and cannot be adaptively adjusted according to the changes in the common center of gravity of the clamping part and the connecting rod, and the common center of gravity of the connecting rod, the clamping part and the counterweight cannot be adjusted to the rotation axis of the rotating seat. In actual application, when boring the small end of the connecting rod, the common center of gravity of the connecting rod and the clamping part is located on the side of the clamp's rotation axis away from the rotation axis of the rotating seat; when boring the large end of the connecting rod, the common center of gravity of the connecting rod and the clamping part is located on the rotation axis of the clamp On the side close to the rotating axis of the rotating seat; if the center of gravity of the counterweight block cannot be adjusted according to the change of the common center of gravity of the clamping part and the connecting rod, it will cause uneven mass distribution on the rotating fixture, and the effect of balancing the counterweight will be poor. When the rotating fixture drives the connecting rod to rotate at high speed, due to the imbalance of centrifugal force, the centrifugal forces generated by different parts cannot offset each other, resulting in periodic changes in inertia force, which causes the fixture to vibrate violently, affecting the quality and accuracy of the boring of the connecting rod's large and small heads. There are certain limitations and it needs to be improved.

[0006] Therefore, it is necessary to provide an adjustable fixture for finishing the boring of connecting rods to solve the above technical problems. Summary of the Invention

[0007] The purpose of the present invention is to provide an adjustable fixture for finishing the boring of connecting rods. By designing a counterweight block with adjustable position, the position of the counterweight is adjusted in real time according to the change of the center of gravity of the connecting rod and the clamping part, ensuring that the common center of gravity of the counterweight block, the connecting rod and the clamping part always coincides with the rotation axis of the rotating seat, which is conducive to the uniform distribution of the mass of the rotating fixture. The centrifugal forces generated during rotation offset each other in all directions, reducing jitter, and improving the surface quality and dimensional accuracy of the connecting rod boring, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an adjustable clamp for finishing boring of connecting rods, comprising a rotating seat, a clamping portion rotatably connected to one side of the front face of the rotating seat, a connecting rod being clamped and fixed on the clamping portion, a counterweight block rotatably connected to the front face of the rotating seat via a second rotating shaft, the counterweight block and the clamping portion being symmetrically arranged about the axis of the rotating seat, the total mass of the clamping portion and the connecting rod being consistent with the mass of the counterweight block, and the common center of gravity of the clamping portion and the connecting rod and the center of gravity of the counterweight block being symmetrically arranged about the axis of the rotating seat;

[0009] The clamping portion and the counterweight are connected via a synchronization mechanism;

[0010] When the position of the connecting rod is changed, the counterweight is driven to adjust synchronously by the synchronization mechanism, so that the common center of gravity of the clamping part and the connecting rod and the center of gravity of the counterweight are always symmetrically arranged with respect to the axis of the rotating seat;

[0011] By rotating the clamping part and installing it on the rotating seat, after the boring of one end of the connecting rod on the clamping part is completed, the position of the connecting rod can be adjusted by rotating the clamping part to realize the exchange of the positions of the large and small ends of the connecting rod, so that the two holes of the large and small ends of the connecting rod can be processed by one clamping, without repeated clamping, thereby improving the effect of the connecting rod boring processing, and through the coordinated use of the limiting mechanism and the limiting sleeve, the adjusted clamp seat can be limited and fixed, thereby improving the stability of the clamping part, so as to ensure the stability of the connecting rod during processing, and avoid affecting the accuracy of boring due to shaking and deviation of the connecting rod.

[0012] As a further description of the above technical solution: the clamping part includes a clamp seat and two limiting sleeves, the clamp seat is rotatably mounted on one side of the front of the rotating seat through a rotating shaft, the front of the clamp seat is fixedly connected to the limiting seat, the front of the limiting seat is provided with a positioning groove adapted to the size of the connecting rod, and the front of the limiting seat is hingedly connected to a clamping frame, the clamping frame is movably inserted with a locking bolt at one end hinged to the limiting seat, and a bolt hole adapted to the locking bolt is provided on the front of the limiting seat and at a position corresponding to the locking bolt, and the clamping frame is locked and fixed to the limiting seat through the cooperation of the locking bolt and the bolt hole;

[0013] A limiting mechanism is provided on the front of the clamp seat, and the limiting mechanism and the limiting sleeve are used in conjunction with each other to limit and fix the clamp seat.

[0014] As a further description of the above technical solution: the two limiting sleeves are fixedly embedded and installed on the front side of the rotating seat, the two limiting sleeves are symmetrically distributed around the axis of the rotating shaft, and one of the limiting sleeves is arranged corresponding to the position of the limiting mechanism.

[0015] As a further description of the above technical solution: the limiting mechanism includes a fixed block fixedly installed on the front side of the clamp seat, a rectangular rod movably installed on the fixed block, the front and rear ends of the rectangular rod are fixedly connected to a pull rod and a circular plate respectively, the rear side of the circular plate is fixedly connected to a limiting pin, and an extrusion spring is fixedly connected between the circular plate and the fixed block, and the extrusion spring is movably sleeved on the outside of the rectangular rod; in actual application, the worker pulls the pull rod toward the front, driving the rectangular rod, the circular plate and the limiting pin to move synchronously, and the circular plate moves to the side close to the fixed block. The extrusion spring is squeezed to compress it and store energy, and the pull rod is continuously pulled until the limit pin exits the limit sleeve, releasing the limit fixation of the fixture seat. The fixture seat is then manually rotated 180° clockwise, driving the limit mechanism to rotate synchronously, that is, the limit mechanism rotates to the front of the other limit sleeve, and the elastic force of the extrusion spring pushes the circular plate to move to the side away from the fixed block, thereby driving the limit pin to be inserted into the corresponding limit sleeve, and again limiting and fixing the fixture seat to improve the stability of the fixture seat.

[0016] As a further description of the above technical solution: the limit pin is movably inserted into one of the limit sleeves.

[0017] As a further description of the above technical solution: the synchronization mechanism includes a protective shell, the protective shell is fixedly mounted on the front of the rotating base, two rotating shafts 3 are fixedly connected between the back of the inner wall of the protective shell and the rotating base, the outer surfaces of the two rotating shafts 3 are fixedly sleeved with gear 1, the outer surfaces of the two gears 1 are meshed with gear 2, and the outer surfaces of the two gears 1 are meshed with the same rack, and the rack is slidably mounted on the inner wall of the protective shell through a sliding assembly;

[0018] In specific applications, when the rotating shaft 1 on the clamping part rotates, it drives the gear 2 fixedly connected to it to rotate, and then drives the gear 1 meshing with the gear 2 to rotate, and then transmits the kinetic energy to the other gear 1 through the rack, and then drives the other gear 2 to rotate, and drives the rotating shaft 2 to rotate synchronously, so that when the position of the large and small heads of the connecting rod clamped and fixed on the clamping part is exchanged, the counterweight block can be driven to adjust synchronously through the synchronization mechanism, so that the common center of gravity of the clamping part and the connecting rod and the center of gravity of the counterweight block are always symmetrically arranged with the axis center of the rotating seat, which is conducive to the uniform distribution of the mass of the clamp, and the centrifugal force generated during rotation offsets each other in all directions, reducing jitter, and thereby improving the surface quality and dimensional accuracy of the connecting rod boring.

[0019] As a further description of the above technical solution: the sliding assembly includes a slide rail, which is fixedly installed on the top of the inner wall of the protective shell. The internal sliding connection of the slide rail is provided with multiple sliders. Through the coordinated use of the slide rail and the slider, the rack can be limited to ensure the stability of the rack during movement. Then, when one of the gears transmits kinetic energy to the rack and drives the rack to move, it is beneficial for the rack to accurately transmit kinetic energy to the other gear, so that the two gears rotate synchronously, thereby ensuring that the counterweight block can be driven to rotate synchronously through the synchronization mechanism when the clamping part rotates.

[0020] As a further description of the above technical solution: the plurality of sliders are all fixedly connected to the rack.

[0021] As a further description of the above technical solution: one of the gears 2 is fixedly sleeved on the outer surface of the rotating shaft 1, and the other gear 2 is fixedly sleeved on the outer surface of the rotating shaft 2.

[0022] As a further description of the above technical solution: a rectangular block is fixedly installed on the front of the rotating seat, and the center of gravity of the rectangular block and the center of gravity of the synchronization mechanism are symmetrically distributed with respect to the axis of the rotating seat, and the mass of the rectangular block is consistent with the weight of the synchronization mechanism; the setting of the rectangular block is used to counterweight the synchronization mechanism, which is beneficial to the uniform distribution of the mass of other structures on the rotating seat, and further beneficial to the stable operation of the subsequent clamp during high-speed rotation.

[0023] The present invention has the following beneficial effects:

[0024] 1. When the positions of the large and small heads of the connecting rod of the present invention are exchanged, the common center of gravity of the connecting rod and the clamping part will be exchanged symmetrically with the axis center of the rotating shaft one. Due to the setting of the synchronization mechanism, during the process of exchanging the positions of the large and small heads of the connecting rod, the counterweight block can be driven to rotate 180° in the same direction synchronously, so that the center of gravity of the counterweight block is exchanged symmetrically with the axis center of the rotating shaft two, thereby ensuring that after the positions of the large and small heads of the connecting rod are exchanged, the common center of gravity of the clamping part and the connecting rod and the center of gravity of the counterweight block are always symmetrically set with the axis center of the rotating seat, which is conducive to the uniform distribution of the mass of the fixture. The centrifugal forces generated during rotation offset each other in all directions, reducing vibration, and thus improving the surface quality and dimensional accuracy of the connecting rod boring.

[0025] 2. The rotating shaft 1 on the clamping part of the present invention rotates, driving the gear 2 fixedly connected to it to rotate, and then driving the gear 1 meshing with the gear 2 to rotate, and then transmitting the kinetic energy to the other gear 1 through the rack, and then driving the other gear 2 to rotate, and driving the rotating shaft 2 to rotate synchronously, so that when the position of the large and small heads of the connecting rod clamped and fixed on the clamping part is exchanged, the counterweight block can be driven to be adjusted synchronously through the synchronization mechanism, so that the common center of gravity of the clamping part and the connecting rod and the center of gravity of the counterweight block are always symmetrically arranged with respect to the axis of the rotating seat.

[0026] 3. The present invention rotatably installs the clamping part on the rotating seat so that after the boring process of one end of the connecting rod on the clamping part is completed, the position of the connecting rod can be adjusted by rotating the clamping part to realize the exchange of the positions of the large and small ends of the connecting rod, so that the two-hole processing of the large and small ends of the connecting rod can be completed in one clamping, without the need for repeated clamping, thereby improving the effect of the connecting rod boring process, and through the coordinated use of the limiting mechanism and the limiting sleeve, the adjusted clamp seat can be limited and fixed, thereby improving the stability of the clamping part, so as to ensure the stability of the connecting rod during processing and avoid affecting the accuracy of boring due to shaking and deviation of the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the state of machining the small end of a connecting rod by an adjustable fixture for finishing boring a connecting rod proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the state of machining the big end of a connecting rod by an adjustable fixture for finishing boring of a connecting rod proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of a locking state of a clamping frame of an adjustable clamp for finishing boring of connecting rods proposed by the present invention;

[0030] Figure 4This is a schematic diagram of the clamping frame of the adjustable clamp for finishing boring of connecting rods proposed by the present invention in an open state;

[0031] Figure 5 This is a three-dimensional schematic diagram of the structure including the rotating seat and protective shell of an adjustable fixture for finishing boring of connecting rods proposed by the present invention;

[0032] Figure 6 This is a three-dimensional schematic diagram of the internal structure of the protective shell of an adjustable fixture for finishing boring of connecting rods proposed by the present invention;

[0033] Figure 7 This is a schematic diagram of the rack and rack first-class structure of an adjustable fixture for finishing boring of connecting rods proposed by the present invention;

[0034] Figure 8 This is a three-dimensional schematic diagram of a sliding assembly and a rack of an adjustable fixture for finishing boring a connecting rod proposed by the present invention;

[0035] Figure 9 This is a three-dimensional schematic diagram of a limiting mechanism and a limiting sleeve of an adjustable fixture for finishing boring of connecting rods proposed by the present invention.

[0036] In the figure: 1. Rotating seat; 2. Clamping part; 201. Clamp seat; 202. Limiting sleeve; 203. Rotating shaft 1; 204. Limiting seat; 205. Clamping frame; 206. Locking bolt; 207. Bolt hole; 208. Limiting mechanism; 2081. Fixed block; 2082. Rectangular rod; 2083. Pull rod; 2084. Round plate; 2085. Limiting pin; 2086. Extrusion spring; 209. Positioning slot; 3. Rotating shaft 2; 4. Counterweight; 5. Synchronizing mechanism; 501. Protective shell; 502. Rotating shaft 3; 503. Gear 1; 504. Gear 2; 505. Rack; 506. Sliding assembly; 5061. Slide rail; 5062. Slider; 6. Rectangular block. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] As attached Figure 1 To the attached Figure 9 As shown:

[0039] Embodiment 1: The present invention provides an adjustable fixture for finishing boring of connecting rods, comprising a rotating base 1, a clamping portion 2 being rotatably connected to one side of the front face of the rotating base 1, a connecting rod being clamped and fixed on the clamping portion 2, a counterweight 4 being rotatably connected to the front face of the rotating base 1 via a second rotating shaft 3, the counterweight 4 and the clamping portion 2 being symmetrically arranged about the axis of the rotating base 1, the sum of the masses of the clamping portion 2 and the connecting rod being consistent with the mass of the counterweight 4, and the common center of gravity of the clamping portion 2 and the connecting rod and the center of gravity of the counterweight 4 being symmetrically arranged about the axis of the rotating base 1;

[0040] The clamping portion 2 and the counterweight 4 are connected via a synchronization mechanism 5;

[0041] In actual application, when the position of the connecting rod's reducer and reducer is exchanged, the common center of gravity of the connecting rod and the clamping part 2 will be exchanged symmetrically with the axis center of the rotating shaft 1 203. Due to the setting of the synchronization mechanism 5, during the process of exchanging the position of the connecting rod's reducer and reducer, the counterweight block 4 can be driven to rotate 180 degrees in the same direction synchronously, so that the center of gravity of the counterweight block 4 is exchanged symmetrically with the axis center of the rotating shaft 2 3, thereby ensuring that after the position of the connecting rod's reducer and reducer is exchanged, the common center of gravity of the clamping part 2 and the connecting rod and the center of gravity of the counterweight block 4 are always symmetrically arranged with the axis center of the rotating seat 1, which is conducive to the uniform distribution of the mass of the clamping part 2. The centrifugal forces generated during rotation offset each other in all directions, reducing vibration, and thus improving the surface quality and dimensional accuracy of the connecting rod boring.

[0042] By rotating the clamping part 2 and installing it on the rotating seat 1, after the boring processing of one end of the connecting rod on the clamping part 2 is completed, the position of the connecting rod is adjusted by rotating the clamping part 2 to realize the exchange of the positions of the large and small ends of the connecting rod, so that the two-hole processing of the large and small ends of the connecting rod can be completed in one clamping, without the need for repeated clamping, thereby improving the effect of the connecting rod boring processing, and through the coordinated use of the limiting mechanism 208 and the limiting sleeve 202, the adjusted clamp seat 201 can be limited and fixed, thereby improving the stability of the clamping part 2, so as to ensure the stability of the connecting rod during processing, and avoid affecting the accuracy of boring due to shaking and deviation of the connecting rod.

[0043] The clamping part 2 includes a clamp seat 201 and two limiting sleeves 202. The clamp seat 201 is rotatably mounted on one side of the front of the rotating base 1 through a rotating shaft 203. The front of the clamp seat 201 is fixedly connected to the limiting seat 204. The front of the limiting seat 204 is provided with a positioning groove 209 adapted to the size of the connecting rod, and the front of the limiting seat 204 is hinged with a clamping frame 205. The clamping frame 205 is movably inserted with a locking bolt 206 at one end away from the hinged end of the limiting seat 204. A bolt hole 207 adapted to the locking bolt 206 is provided on the front of the limiting seat 204 and at the position corresponding to the locking bolt 206. The clamping frame 205 is locked and fixed to the limiting seat 204 through the cooperation of the locking bolt 206 and the bolt hole 207. The setting of the clamping part 2 is used to stably clamp and fix the connecting rod to be processed, so as to prevent the connecting rod from loosening and causing position deviation when the subsequent fixture drives the connecting rod to rotate at high speed for boring processing, thereby affecting the progress of the boring processing;

[0044] A limiting mechanism 208 is provided on the front of the clamp seat 201 . The limiting mechanism 208 and the limiting sleeve 202 are used in conjunction with each other to limit and fix the clamp seat 201 .

[0045] The two limiting sleeves 202 are fixedly embedded and installed on the front side of the rotating base 1. The two limiting sleeves 202 are symmetrically distributed around the axis of the rotating shaft 1 203, and one of the limiting sleeves 202 is arranged corresponding to the position of the limiting mechanism 208.

[0046] The limiting mechanism 208 includes a fixed block 2081 fixedly mounted on the front face of the clamp seat 201, a rectangular rod 2082 movably mounted on the fixed block 2081, a pull rod 2083 and a circular plate 2084 fixedly connected to the front and rear ends of the rectangular rod 2082, respectively, a limiting latch 2085 fixedly connected to the rear side of the circular plate 2084, and an extrusion spring 2086 fixedly connected between the circular plate 2084 and the fixed block 2081, and the extrusion spring 2086 movably sleeved on the outside of the rectangular rod 2082, and the limiting latch 2085 movably inserted into one of the limiting sleeves 202;

[0047] The clamping member 201 is then manually clamped and the clamping member 201 is released from the clamping member 201. The clamping member 201 is then manually clamped and the clamping member 201 is released from the clamping member 201. The clamping member 201 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 201 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 201 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 201 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 201 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 208 is then manually clamped and the clamping member 208 is manually clamped. The clamping member 208 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 208 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 208 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 208 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 208 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 208 is then manually clamped and the clamping member 201 is manually clamped. The clamping member 208 is then manually clamped and the clamping member 201 is manually clamped.

[0048] Working principle: When it is necessary to perform fine boring processing on the large and small heads of the connecting rod, the staff first loosens the locking bolt 206 by using a bolt tightening tool, so that the locking bolt 206 and the bolt hole 207 are released from the threaded connection. At this time, the clamping frame 205 can be movably flipped open to facilitate the staff to put the connecting rod to be processed into the positioning groove 209, and then flip the clamping frame 205 to make it buckle on the outside of the connecting rod to be processed, and use the bolt tightening tool to tighten the locking bolt 206 to make it threadedly connected with the bolt hole 207, and then lock the clamping frame 205 and the fixture seat 201. At this time, the clamping frame 205 plays a role in clamping and fixing the connecting rod to be processed in the positioning groove 209, ensuring that the connecting rod to be processed is stably clamped and fixed on the clamping part 2;

[0049] Then, the rotating seat 1 is driven to rotate at high speed by an external driving member (such as a driving motor), and at the same time, the large end or small end of the connecting rod is bored by a linear feed of an external boring cutter;

[0050] When the boring process of one end of the connecting rod is completed, the staff first turns off the external drive component to stop the rotation of the rotating seat 1, and then the worker pulls the pull rod 2083 toward the front, driving the rectangular rod 2082, the circular plate 2084 and the limit pin 2085 to move synchronously. The circular plate 2084 moves toward the side close to the fixed block 2081, squeezing the extrusion spring 2086 to put it in a compressed state and store energy, and continues to pull the pull rod 2083 until the limit pin 2085 exits the limit sleeve 202, releasing the clamp. The clamp seat 201 is limited and fixed, and then the clamp seat 201 is manually rotated 180 degrees clockwise, driving the limiting mechanism 208 to rotate synchronously, that is, the limiting mechanism 208 rotates to the front of the other limiting sleeve 202, and the elastic force of the extrusion spring 2086 pushes the circular plate 2084 to move to the side away from the fixed block 2081, thereby driving the limiting pin 2085 to be inserted into the corresponding limiting sleeve 202, and the clamp seat 201 is limited and fixed again, thereby improving the stability of the clamp seat 201;

[0051] And when the fixture seat 201 rotates 180° clockwise, it can drive the connecting rod to be processed, which is clamped and fixed on the clamping part 2, to exchange the position of the reducer and reducer.

[0052] When the positions of the large and small heads of the connecting rod are exchanged, the common center of gravity of the connecting rod and the clamping part 2 will be symmetrically exchanged with the axis center of the rotating shaft 203. Due to the setting of the synchronization mechanism 5, during the process of exchanging the positions of the large and small heads of the connecting rod, the counterweight block 4 can be driven to rotate 180° in the same direction synchronously, so that the center of gravity of the counterweight block 4 is symmetrically exchanged with the axis center of the rotating shaft 2 3, thereby ensuring that after the positions of the large and small heads of the connecting rod are exchanged, the common center of gravity of the clamping part 2 and the connecting rod and the center of gravity of the counterweight block 4 are always symmetrically set with the axis center of the rotating seat 1, which is conducive to the uniform distribution of the mass of the clamping part 2. The centrifugal forces generated during rotation offset each other in all directions, reducing vibration, and thus improving the surface quality and dimensional accuracy of the connecting rod boring.

[0053] Embodiment 2: This embodiment is basically the same as the previous embodiment, except that the synchronization mechanism 5 includes a protective shell 501, which is fixedly mounted on the front of the rotating base 1. Two rotating shafts 3 502 are fixedly connected between the back of the inner wall of the protective shell 501 and the rotating base 1. The outer surfaces of the two rotating shafts 3 502 are fixedly sleeved with gears 1 503. The outer surfaces of the two gears 1 503 are meshed with gears 2 504, and the outer surfaces of the two gears 1 503 are meshed with the same rack 505. The rack 505 is slidably mounted on the inner wall of the protective shell 501 through a sliding assembly 506.

[0054] More specifically, the sliding assembly 506 includes a slide rail 5061, which is fixedly mounted on the top of the inner wall of the protective shell 501. A plurality of sliders 5062 are slidably connected to the interior of the slide rail 5061. The plurality of sliders 5062 are fixedly connected to the rack 505. The sliding assembly 506 is used to limit the rack 505, thereby improving the stability of the rack 505 during movement, thereby ensuring the stability of the transmission of the rack 505. After one of the gears 1 503 transmits kinetic energy to the rack 505, the rack 505 can transmit kinetic energy to the other gear 1 503, so that the two gears 1 503 can rotate synchronously.

[0055] More specifically, one of the second gears 504 is fixedly sleeved on the outer surface of the first rotating shaft 203 , and the other second gear 504 is fixedly sleeved on the outer surface of the second rotating shaft 3 .

[0056] During the process of exchanging the positions of the large and small heads of the connecting rod clamped and fixed on the clamping part 2, the rotating shaft 1 203 on the clamping part 2 rotates, driving the gear 2 504 fixedly connected to it to rotate, and then driving the gear 1 503 meshing with the gear 2 504 to rotate, and then transmitting the kinetic energy to another gear 1 503 through the rack 505, and then driving the other gear 2 504 to rotate, and driving the rotating shaft 2 3 to rotate synchronously, so as to realize that when the position of the large and small heads of the connecting rod clamped and fixed on the clamping part 2 is exchanged, the counterweight block 4 can be driven to be adjusted synchronously through the synchronization mechanism 5, so that the common center of gravity of the clamping part 2 and the connecting rod and the center of gravity of the counterweight block 4 are always symmetrically arranged with the axis center of the rotating seat 1, which is conducive to the uniform distribution of the mass of the fixture, and the centrifugal forces generated during rotation offset each other in all directions, reducing jitter, and thereby improving the surface quality and dimensional accuracy of the connecting rod boring.

[0057] Example 3: This example is basically the same as the previous example, except that a rectangular block 6 is fixedly installed on the front of the rotating seat 1, and the center of gravity of the rectangular block 6 and the center of gravity of the synchronization mechanism 5 are symmetrically distributed about the axis of the rotating seat 1. Specifically, the mass of the rectangular block 6 is consistent with the weight of the synchronization mechanism 5.

[0058] The rectangular block 6 is provided to counterweight the synchronization mechanism 5, which is beneficial to the uniform distribution of the mass of the clamp, and further beneficial to the stable operation of the subsequent clamp during high-speed rotation.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable fixture for finishing boring of connecting rods, comprising a rotary seat (1), characterized in that: A clamping portion (2) is rotatably connected to one side of the front face of the rotating seat (1), a connecting rod is clamped and fixed on the clamping portion (2), and a counterweight (4) is rotatably connected to the front face of the rotating seat (1) via a second rotating shaft (3), the counterweight (4) and the clamping portion (2) are symmetrically arranged about the axis of the rotating seat (1), and the total mass of the clamping portion (2) and the connecting rod is consistent with the mass of the counterweight (4), and the common center of gravity of the clamping portion (2) and the connecting rod and the center of gravity of the counterweight (4) are symmetrically arranged about the axis of the rotating seat (1); The clamping portion (2) and the counterweight (4) are connected via a synchronization mechanism (5); When the positions of the connecting rod's large and small ends are exchanged, the counterweight (4) is driven to adjust synchronously by the synchronization mechanism (5), so that the common center of gravity of the clamping portion (2) and the connecting rod and the center of gravity of the counterweight (4) are always symmetrically arranged about the axis of the rotating seat (1).

2. The adjustable fixture for finishing boring of connecting rods according to claim 1, characterized in that: The clamping portion (2) includes a clamping seat (201) and two limiting sleeves (202). The clamping seat (201) is rotatably mounted on one side of the front of the rotating seat (1) via a rotating shaft (203). The front of the clamping seat (201) is fixedly connected to a limiting seat (204). The front of the limiting seat (204) is provided with a positioning groove (209) adapted to the size of the connecting rod, and the front of the limiting seat (204) is hinged with a clamping The clamping frame (205) is provided with a locking bolt (206) at one end of the clamping frame (205) that is away from the end hinged to the limiting seat (204), and a bolt hole (207) that is adapted to the locking bolt (206) is provided on the front of the limiting seat (204) at a position corresponding to the locking bolt (206). The clamping frame (205) is locked and fixed to the limiting seat (204) through the cooperation of the locking bolt (206) and the bolt hole (207); A limiting mechanism (208) is provided on the front side of the clamp seat (201), and the limiting mechanism (208) and the limiting sleeve (202) are used in conjunction with each other to limit and fix the clamp seat (201).

3. The adjustable fixture for finishing boring of connecting rods according to claim 2, characterized in that: The two limiting sleeves (202) are fixedly embedded and installed on the front side of the rotating seat (1). The two limiting sleeves (202) are symmetrically distributed about the axis of the rotating shaft (203), and one of the limiting sleeves (202) is arranged corresponding to the position of the limiting mechanism (208).

4. The adjustable fixture for finishing boring of connecting rods according to claim 2, characterized in that: The limiting mechanism (208) comprises a fixed block (2081) fixedly mounted on the front side of the clamp seat (201); a rectangular rod (2082) is movably mounted on the fixed block (2081); a pull rod (2083) and a circular plate (2084) are fixedly connected to the front and rear ends of the rectangular rod (2082), respectively; a limiting latch (2085) is fixedly connected to the rear side of the circular plate (2084); an extrusion spring (2086) is fixedly connected between the circular plate (2084) and the fixed block (2081), and the extrusion spring (2086) is movably sleeved on the outside of the rectangular rod (2082).

5. The adjustable fixture for finishing boring of connecting rods according to claim 4, characterized in that: The limiting latch (2085) is movably inserted into the interior of one of the limiting sleeves (202).

6. The adjustable fixture for finishing boring of connecting rods according to claim 1, characterized in that: The synchronization mechanism (5) includes a protective shell (501), the protective shell (501) is fixedly mounted on the front of the rotating seat (1), two rotating shafts (502) are fixedly connected between the back of the inner wall of the protective shell (501) and the rotating seat (1), the outer surfaces of the two rotating shafts (502) are fixedly sleeved with gears (503), the outer surfaces of the two gears (503) are meshed with gears (504), and the outer surfaces of the two gears (503) are meshed with the same rack (505), and the rack (505) is slidably mounted on the inner wall of the protective shell (501) through a sliding assembly (506).

7. The adjustable fixture for finishing boring of connecting rods according to claim 6, characterized in that: The sliding assembly (506) comprises a sliding rail (5061), wherein the sliding rail (5061) is fixedly mounted on the top of the inner wall of the protective shell (501), and a plurality of sliding blocks (5062) are slidably connected inside the sliding rail (5061).

8. The adjustable fixture for finishing boring of connecting rods according to claim 7, characterized in that: The plurality of sliders (5062) are all fixedly connected to the rack (505).

9. The adjustable fixture for finishing boring of connecting rods according to claim 6, characterized in that: One of the gears 2 (504) is fixedly sleeved on the outer surface of the rotating shaft 1 (203), and the other gear 2 (504) is fixedly sleeved on the outer surface of the rotating shaft 2 (3).

10. The adjustable fixture for finishing boring of connecting rods according to claim 1, characterized in that: A rectangular block (6) is fixedly mounted on the front of the rotating seat (1), and the center of gravity of the rectangular block (6) and the center of gravity of the synchronization mechanism (5) are symmetrically distributed about the axis of the rotating seat (1).

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