Engine left suspension assembly tightening three-limit fixing tool

Abstract

The utility model discloses an engine left suspension assembly tightens three limit fixed frock relates to engine field. The engine left suspension assembly tightens three limit fixed frock, including fixed plate, left limit block, right limit block and fender, left limit block and right limit block install on fixed plate, and its contour is respectively matched with the left side and right side contour of left cushion lower part frame, and the fender is installed on the fixed plate, and the one side of its facing work piece is equipped with the inner cavity structure of specific shape. The engine left suspension assembly tightens three limit fixed frock, and the contour of left limit block and right limit block is respectively completely adapted with left cushion lower part frame left and right side contour, and forms to left cushion lower part's first limit, and the profiling structure of fender inner cavity left side 'L' shape, right side '7' shape, is respectively adapted with left cushion upper part iron frame, left support lower part contour, forms to left cushion upper part's second limit and left support's third limit.

Description

Technical Field

[0001] This utility model relates to the field of engines, and in particular to a three-limit fixing fixture for tightening the left suspension assembly of an engine. Background Technology

[0002] As the core power component of a vehicle, the engine needs to connect to the entire vehicle, such as light trucks and pickups, through the suspension assembly. The suspension assembly not only has to bear the enormous weight of the engine but also needs to have a shock absorption function to prevent damage to the engine from strong vibrations during vehicle operation. The engine suspension assembly usually consists of a left suspension assembly and a right suspension assembly. The two have similar structures, with only minor dimensional adjustments made according to the internal space of the vehicle's front end. This tooling is designed for the left suspension assembly, which mainly consists of a left shock absorber, a left bracket, a spring washer, and a nut. During assembly, the left bracket needs to be fixed to the left shock absorber with the nut. The standard tightening torque is approximately 125 N·m.

[0003] The existing tooling used for tightening the left suspension assembly has significant drawbacks: it can only secure the lower iron frame of the left shock absorber and lacks comprehensive limiting components. When tightening the nut with an air gun, the 125 N·m tightening force causes the left shock absorber to wobble, leading to a shift in the relative position of the left bracket and the left shock absorber. In extreme cases, this can cause the rubber parts of the left shock absorber to crack under stress, resulting in serious quality issues. Furthermore, the air gun uses a pulsed, gradually increasing force to the specified torque, resulting in a large fluctuation range in actual torque, which easily leads to torque non-compliance and requires repeated rework, severely impacting workshop production efficiency.

[0004] As the construction of intelligent factories progresses, tightening tools need to be gradually upgraded to Atalas brand electric guns. These electric guns can achieve torque in one step, with higher torque accuracy and faster tightening speed, but the impact force on the left suspension assembly is also significantly increased. The old tooling, lacking a stable limiting structure, cannot withstand the impact load of the electric gun, nor can it prevent the left suspension assembly from shifting position during tightening. Furthermore, it forces employees' arms to endure the impact of the electric gun for extended periods, further exacerbating quality issues and operational risks. The existing tooling is completely inadequate to meet the needs of the upgraded tools, necessitating a new type of fixed tooling with stable limiting functions. Utility Model Content

[0005] The purpose of this utility model is to provide a three-limit fixing fixture for tightening the left engine mount assembly, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a three-limit fixing fixture for tightening the left engine suspension assembly, comprising a fixing plate, a left limiting block, a right limiting block, and a stop block. The left and right limiting blocks are mounted on the fixing plate, and their outlines match the left and right outlines of the lower left shock absorber frame, respectively, to form a first limit on the left and right sides of the lower left shock absorber frame. The stop block is mounted on the fixing plate, and its side facing the workpiece has a specific-shaped internal cavity structure. The outline of the internal cavity structure matches the outline of the upper left shock absorber iron frame and the lower left support frame to be assembled, respectively forming a second limit on the upper left shock absorber and a third limit on the left support frame. The left limiting block, right limiting block, and stop block together form a stable three-limit structure, which is used to fix and limit the left engine mount assembly during the tightening of the nut to prevent it from shifting or deflecting.

[0007] Preferably, it also includes M8 bolts, internally threaded cylindrical pins, M6 bolts, and M10 bolts.

[0008] Preferably, the fixing plate has 4 stepped through holes, 4 precision through holes, 2 M6 threaded holes and 3 M10 threaded holes; The M8 bolt passes through the stepped through hole and connects to the workbench; The internally threaded cylindrical pin is embedded in the precision through hole to achieve the positioning of the left limiting block and the right limiting block; The M6 ​​bolt engages with the M6 ​​threaded hole to fix the left limiting block and the right limiting block; The M10 bolt engages with the M10 threaded hole to secure the stop block.

[0009] Preferably, the left limiting block has one stepped hole and two precision through holes; the internally threaded cylindrical pin is embedded in the precision through hole of the left limiting block to position the left limiting block; the M6 ​​bolt passes through the stepped hole of the left limiting block to fix the left limiting block; the contour of the left limiting block is perfectly matched with the contour of the left side of the left shock absorber lower frame.

[0010] Preferably, the right limiting block has one stepped hole and two precision through holes; the internally threaded cylindrical pin is embedded in the precision through hole of the right limiting block to position the right limiting block; the M6 ​​bolt passes through the stepped hole of the right limiting block to fix the right limiting block; the contour of the right limiting block is perfectly matched with the contour of the right side of the left shock absorber lower frame.

[0011] Preferably, the stop block has three stepped holes, and the M10 bolt passes through the stepped holes to connect with the fixing plate to fix the stop block.

[0012] Preferably, the specific shape of the inner cavity structure of the stop block is a contoured inner cavity, with an "L" shape on the left and a "7" shape on the right. This shape is adapted to the outer contour of the upper iron frame of the left shock absorber and the outer contour of the lower part of the left support.

[0013] Preferably, the fixing plate, left limiting block, right limiting block and stop block are made of 45# steel or Q235 steel.

[0014] The technical effects and advantages of this utility model are as follows: The contours of the left and right limiting blocks are perfectly matched with the left and right side contours of the lower left shock absorber frame, forming the first limiting on the lower left shock absorber, which can effectively restrict the left and right swaying of the lower left shock absorber during the tightening process; the L-shaped and 7-shaped contoured structures on the left and right sides of the inner cavity of the stop block are matched with the contours of the upper left shock absorber iron frame and the lower left support, respectively, forming the second limiting on the upper left shock absorber and the third limiting on the left support, which can prevent the left shock absorber and the left support from angular deflection. The three limiting structures together completely solve the problems of left shock absorber rubber cracking and left support and left shock absorber offset caused by the lack of limiting in the old tooling, while avoiding additional positional deviation caused by electric gun impact, thus eliminating potential quality problems at the root. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembly structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the structure of the fixing plate of this utility model; Figure 4 This is a schematic diagram of the structure of the left limiting block of this utility model; Figure 5 This is a schematic diagram of the right limiting block of this utility model; Figure 6 This is a schematic diagram of the structure of the stop block of this utility model. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the stop block of this utility model. Figure 2 .

[0016] In the diagram: 1. Fixing plate; 2. M8 bolt; 3. Left limit block; 4. Right limit block; 5. Internal threaded cylindrical pin; 6. M6 bolt; 7. Stop block; 8. M10 bolt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] This utility model provides, for example Figures 1-7 The shown is a three-limit fixing fixture for tightening the left engine mount assembly, including a fixing plate 1, a left limiting block 3, a right limiting block 4, and a stop block 7. The left limiting block 3 and the right limiting block 4 are mounted on the fixing plate 1, and their outlines match the left and right outlines of the left lower shock absorber frame, respectively, to form the first limit on the left and right sides of the left lower shock absorber frame. The stop block 7 is mounted on the fixing plate 1, and its side facing the workpiece has a specific shaped inner cavity structure. The outline of the inner cavity structure matches the outline of the left upper shock absorber iron frame to be assembled and the lower outline of the left bracket, respectively, to form the second limit on the left upper shock absorber and the third limit on the left bracket. The left limit block 3, the right limit block 4, and the stop block 7 together form a stable three-limit structure, which is used to fix and limit the left engine mount assembly during the tightening of the nut to prevent it from shifting or deflecting.

[0019] The contours of the left limiting block 3 and the right limiting block 4 perfectly match the left and right contours of the lower left shock absorber frame, forming the first limiting on the lower left shock absorber, effectively restricting its left and right swaying during tightening. The L-shaped and 7-shaped contoured structures on the left and right sides of the inner cavity of the stop block 7 match the contours of the upper left shock absorber iron frame and the lower left support, respectively, forming the second limiting on the upper left shock absorber and the third limiting on the left support, preventing angular deflection between the left shock absorber and the left support. The three limiting structures together completely solve the problems of left shock absorber rubber cracking and left support and left shock absorber misalignment caused by the lack of limiting in the old tooling, while avoiding additional positional deviation caused by electric gun impact, eliminating potential quality problems at the source.

[0020] Furthermore, it also includes M8 bolt 2, internal threaded cylindrical pin 5, M6 bolt 6, and M10 bolt 8.

[0021] Furthermore, the fixing plate 1 has 4 stepped through holes, 4 precision through holes, 2 M6 threaded holes and 3 M10 threaded holes. M8 bolt 2 passes through the stepped through-hole and connects to the workbench; The internally threaded cylindrical pin 5 is embedded in the precision through hole to achieve the positioning of the left limit block 3 and the right limit block 4; M6 bolt 6 engages with M6 threaded hole to fix left limit block 3 and right limit block 4; The M10 bolt 8 engages with the M10 threaded hole to secure the stop block 7.

[0022] Four precision through holes on the fixing plate 1, in conjunction with internally threaded cylindrical pins 5, enable precise positioning of the left limiting block 3 and the right limiting block 4, ensuring their fit with the lower left shock absorber frame. The M6 ​​bolts 6, threaded into the M6 ​​threaded holes on the fixing plate 1, securely fix the left limiting block 3 and the right limiting block 4, preventing misalignment. The stop block 7, connected to the M10 threaded holes on the fixing plate 1 by M10 bolts 8, along with pre-tightening adjustments, ensures precise alignment between the stop block 7 and the left suspension assembly. This high-precision positioning significantly reduces torque fluctuations during electric gun tightening, minimizing rework due to torque discrepancies. Furthermore, it eliminates reliance on employee experience, stabilizing production rhythm and significantly improving workshop efficiency.

[0023] Furthermore, the left limiting block 3 has one stepped hole and two precision through holes; the internally threaded cylindrical pin 5 is embedded in the precision through hole of the left limiting block 3 to position the left limiting block 3; the M6 ​​bolt 6 passes through the stepped hole of the left limiting block 3 to fix the left limiting block 3; the contour of the left limiting block 3 is perfectly matched with the contour of the left side of the left shock absorber lower frame.

[0024] Furthermore, the right limiting block 4 has one stepped hole and two precision through holes; the internally threaded cylindrical pin 5 is embedded in the precision through hole of the right limiting block 4 to position the right limiting block 4; the M6 ​​bolt 6 passes through the stepped hole of the right limiting block 4 to fix the right limiting block 4; the contour of the right limiting block 4 is perfectly matched with the contour of the right side of the left shock absorber lower frame.

[0025] Furthermore, the stop block 7 has three stepped holes, through which M10 bolts 8 are passed to connect with the fixing plate 1 to fix the stop block 7.

[0026] Furthermore, the specific shape of the inner cavity structure of the stop block 7 is a contoured inner cavity, with an "L" shape on the left and a "7" shape on the right. This shape is adapted to the outer contour of the upper iron frame of the left shock absorber and the outer contour of the lower part of the left support.

[0027] Furthermore, the fixing plate 1, the left limiting block 3, the right limiting block 4, and the stop block 7 are made of 45# steel or Q235 steel.

[0028] The operator places the left suspension assembly, which includes the left shock absorber and the left bracket, on the fixed plate 1, so that the left side of the lower frame of the left shock absorber is in contact with the outline of the left limiting block 3 and the right side is in contact with the outline of the right limiting block 4. The left and right movement of the lower part of the left shock absorber is restricted by the first limiting of the left limiting block 3 and the right limiting block 4.

[0029] Make the upper iron frame of the left shock absorber completely fit with the "L"-shaped structure inside the cavity of the stop block 7 to achieve the second limit and restrict the displacement of the upper part of the left shock absorber. At the same time, make the lower part of the left support completely fit with the "7"-shaped structure inside the cavity of the stop block 7 to achieve the third limit and restrict the deflection of the left support. After the left suspension assembly and the stop block 7 are completely aligned, tighten the three M10 bolts 8 to firmly fix the stop block 7 on the fixing plate 1. At this time, the left limit block 3, the right limit block 4 and the stop block 7 form a complete three-limit constraint, and the left suspension assembly cannot be displaced or deflected.

[0030] Take one spring washer and one nut, put them on the stud of the left damper and pre-tighten them by more than 3 threads to prevent slippage during subsequent tightening; finally, the employee operates the electric tightening gun to tighten the nut to the specified torque. During the tightening process, the three-limit structure continuously and stably constrains the left suspension assembly to ensure accurate tightening torque and that the relative position of the left bracket and the left damper remains unchanged, thus completing the high-quality assembly of the left suspension assembly.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-limit fixing fixture for tightening the left engine mount assembly, comprising a fixing plate (1), a left limiting block (3), a right limiting block (4), and a stop block (7), characterized in that, The left limiting block (3) and the right limiting block (4) are installed on the fixed plate (1), and their outlines match the left and right outlines of the left shock-absorbing lower frame, respectively, to form the first limiting on the left and right sides of the left shock-absorbing lower frame. The stop block (7) is installed on the fixed plate (1), and its side facing the workpiece has a specific shaped inner cavity structure. The outline of the inner cavity structure matches the outline of the left shock-absorbing upper iron frame and the lower outline of the left support to be assembled, to form the second limiting on the left shock-absorbing upper part and the third limiting on the left support, respectively. The left limiting block (3), right limiting block (4) and stop block (7) together form a stable three-limit structure, which is used to fix and limit the left engine mount assembly during the tightening of the nut to prevent it from shifting or deflecting.

2. The three-limit fixing fixture for tightening the left engine mount assembly according to claim 1, characterized in that, It also includes M8 bolts (2), internal threaded cylindrical pins (5), M6 bolts (6) and M10 bolts (8).

3. The three-limit fixing fixture for tightening the left engine mount assembly according to claim 2, characterized in that, The fixing plate (1) has 4 stepped through holes, 4 precision through holes, 2 M6 threaded holes and 3 M10 threaded holes. The M8 bolt (2) passes through the stepped through hole and connects to the workbench; The internally threaded cylindrical pin (5) is embedded in the precision through hole to achieve the positioning of the left limiting block (3) and the right limiting block (4); The M6 ​​bolt (6) is threaded into the M6 ​​threaded hole to fix the left limiting block (3) and the right limiting block (4). The M10 bolt (8) is threaded into the M10 threaded hole to fix the stop block (7).

4. The three-limit fixing fixture for tightening the left engine mount assembly according to claim 3, characterized in that, The left limiting block (3) has one stepped hole and two precision through holes; the internal threaded cylindrical pin (5) is embedded in the precision through hole of the left limiting block (3) to position the left limiting block (3); the M6 ​​bolt (6) passes through the stepped hole of the left limiting block (3) to fix the left limiting block (3); the outline of the left limiting block (3) is completely adapted to the outline of the left side of the left shock absorber lower frame.

5. The three-limit fixing fixture for tightening the left engine mount assembly according to claim 3, characterized in that, The right limiting block (4) has one stepped hole and two precision through holes; the internal threaded cylindrical pin (5) is embedded in the precision through hole of the right limiting block (4) to position the right limiting block (4); the M6 ​​bolt (6) passes through the stepped hole of the right limiting block (4) to fix the right limiting block (4); the outline of the right limiting block (4) is completely adapted to the outline of the right side of the left shock-absorbing lower frame.

6. The three-limit fixing fixture for tightening the left engine mount assembly according to claim 3, characterized in that, The stop block (7) has three stepped holes, and the M10 bolt (8) passes through the stepped holes and connects to the fixing plate (1) to fix the stop block (7).

7. The three-limit fixing fixture for tightening the left engine mount assembly according to claim 1, characterized in that, The specific shape of the inner cavity structure of the stop block (7) is a contoured inner cavity, with an "L" shape on the left and a "7" shape on the right. This shape is adapted to the outer contour of the upper iron frame of the left shock absorber and the outer contour of the lower part of the left support.

8. The three-limit fixing fixture for tightening the left engine mount assembly according to claim 1, characterized in that, The fixing plate (1), left limiting block (3), right limiting block (4) and stop block (7) are made of 45# steel or Q235 steel.

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