Heavy-duty anti-loosening elastic limiter tolerance adjuster

Abstract

The present invention discloses a heavy-load anti-loosening elastic limit tolerance adjuster, wherein a center hole is opened in the column, an internal thread is arranged on the inner wall at the lower part of the center hole of the column, the adjusting screw is screwed on the internal thread of the center hole of the column through its external thread, a through hole is opened in the adjusting screw, an annular baffle is arranged on the upper part of the column, the elastic limit retaining spring is annular, a fracture is opened on the elastic limit retaining spring, a positioning plate is arranged on the outer periphery of the elastic limit retaining spring, a positioning groove is opened on the inner wall of the through hole of the adjusting screw, the elastic limit retaining spring is located in the through hole of the adjusting screw, and is clamped in the positioning groove by the positioning plate, and an arc-shaped spring piece is arranged on the upper part of the elastic limit retaining spring. The present invention has the advantages that the adjustment operation is very convenient and quick, and the installation efficiency of the battery pack is effectively improved. At the same time, the tolerance adjuster has a simple structure and low assembly difficulty, which can greatly reduce the manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of tolerance adjusters, and more specifically to the technical field of tolerance adjusters for fixing automobile battery packs. Background Art

[0002] At present, the market share of electric vehicles is increasing year by year. The battery pack is the core component of electric vehicles. During the manufacturing process of electric vehicles, the battery pack needs to be fixedly installed on the frame. The current common installation method is to set a lifting ear on the battery pack, open corresponding through holes on the lifting ear and the frame respectively, and then lift the battery pack through a lifting device to make the lifting ear of the battery pack contact with the bottom surface of the frame, and then pass bolts through the through holes of the battery pack lifting ear and the frame, and screw nuts on the bolts to fix the battery pack on the frame. However, since the bottom surface of the frame is not a complete plane, it may be uneven due to structural reasons, so in the installation During installation, it cannot be guaranteed that each ear on the battery pack is in contact with the bottom surface of the frame, resulting in a distance tolerance between the ear of the battery pack and the bottom surface of the frame. At this time, if the bolts and nuts are tightened forcibly, the ear on the battery pack will be deformed. Therefore, a tolerance adjustment device is required to adjust the distance tolerance between the ear of the battery pack and the frame. However, the common tolerance adjustment devices on the market are generally more complex in structure, more difficult to assemble, and more expensive to manufacture. In addition, when performing tolerance adjustment, the traditional tolerance adjustment device is not only very inconvenient to operate, which seriously affects the installation efficiency of the battery pack, but also easily deforms the ear of the battery pack during the adjustment process. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned deficiencies and to provide a heavy-load anti-loosening elastic limit tolerance adjuster which is simple in structure, very convenient for assembly and production, can greatly reduce manufacturing costs, and is very convenient for tolerance adjustment operation, can effectively improve installation efficiency, and can avoid damaging the battery pack lifting ear during the adjustment process.

[0004] The technical solutions adopted by the present invention to solve the above technical problems are as follows:

[0005] A heavy-load anti-loosening elastic limit tolerance adjuster includes a column, an adjusting screw and an elastic limit retaining spring. A center hole is opened in the column, and an internal thread is arranged on the inner wall of the lower part of the center hole of the column. The adjusting screw is screwed on the internal thread of the center hole of the column through its external thread. A through hole is opened in the adjusting screw, and an annular baffle is arranged on the upper part of the column. The elastic limit retaining spring is annular, and a fracture is opened on the elastic limit retaining spring. A positioning plate is arranged on the outer periphery of the elastic limit retaining spring, and a positioning groove is opened on the inner wall of the through hole of the adjusting screw. The elastic limit retaining spring is located in the through hole of the adjusting screw and is clamped in the positioning groove through the positioning plate. An arc-shaped spring sheet is arranged on the upper part of the elastic limit retaining spring, and a limiting plate is arranged on the upper end part of the arc-shaped spring sheet, and an annular step surface corresponding to the limiting plate is arranged on the inner wall of the center hole of the column.

[0006] A limiting groove is provided on the top of the adjusting screw, and the limiting plates at the upper ends of the arc-shaped spring pieces are respectively located in the limiting grooves, and the positioning groove on the inner wall of the through hole of the adjusting screw is annular.

[0007] A central screw hole communicating with the central hole is provided in the upper part of the column.

[0008] Flower teeth are arranged on the peripheral wall of the cylinder below the annular baffle.

[0009] An annular limiting plate is arranged at the bottom of the adjusting screw.

[0010] Anti-slip grooves are arranged on the bottom surfaces of the adjusting screw and the annular limiting plate.

[0011] The upper part of the central hole of the column is cone-shaped.

[0012] The positioning plates on the elastic limit clamp spring are evenly distributed along the circumferential direction, and the number of the positioning plates is 3 to 6. The arc-shaped spring pieces on the elastic limit clamp spring are evenly distributed along the circumferential direction, and the number of the arc-shaped spring pieces is 3 to 6.

[0013] The elastic limiting clamping spring is made of steel.

[0014] The beneficial effects that can be achieved by the present invention using the above technical solution are:

[0015] 1. When using the tolerance adjuster to fix the battery pack on the frame of the electric vehicle, first insert the column into the through hole of the battery pack ear, and force the teeth on the outer peripheral wall of the column into the inner peripheral wall of the through hole of the battery pack ear, and at the same time make the end face of the annular baffle contact with the ear, and then screw the adjusting screw on the internal thread of the center hole of the column, and then lift the battery pack by lifting equipment, and turn the adjusting screw by a wrench to make the adjusting screw and the anti-slip grooves on the annular limit plate contact with the bottom surface of the frame, thereby achieving the purpose of adjusting the tolerance of the distance between the battery pack ear and the bottom surface of the frame, with a good adjustment effect, and the adjustment operation is very convenient and quick, which effectively improves the installation efficiency of the battery pack. At the same time, the tolerance adjuster has a simple structure, low assembly difficulty, and can greatly reduce the manufacturing cost.

[0016] 2. When adjusting the adjusting screw with a wrench, when the anti-skid patterns of the adjusting screw and the annular limit plate come into contact with the bottom surface of the frame, if the adjusting screw continues to be rotated with the wrench, the torque required for rotation increases, and the clamping force of the arc-shaped spring piece on the wrench head is less than the rotation torque, so that the wrench head overcomes the friction between the arc-shaped spring piece and slips, achieving the function of torque limitation, so that the adjusting screw can no longer move toward the frame, thereby avoiding damage to the lifting ear of the battery pack.

[0017] 3. When the wrench head of the wrench is stuck between the arc-shaped spring pieces, the arc-shaped spring pieces are deformed under the squeezing effect of the wrench head on the arc-shaped spring pieces, thereby driving the limit plate at the upper end of the arc-shaped spring pieces to expand outward, so that the outer end of the limit plate moves to above the annular step surface. During the movement of the adjusting screw, if the outer end of the limit plate contacts the annular step surface of the column, the adjusting screw can no longer be rotated, so that the adjusting screw cannot be detached from the column, thereby achieving the purpose of limiting the adjusting screw and avoiding the phenomenon that the adjusting screw is unscrewed from the column when the tolerance is too large. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 AA cross-sectional view of the present invention;

[0020] Figure 3 for Figure 1 BB cross-sectional view of the present invention;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the elastic limit spring. DETAILED DESCRIPTION

[0022] Depend on Figure 1 , Figure 2 and Figure 3As shown, a heavy-loaded anti-loosening elastic limit tolerance adjuster includes a column 1, an adjusting screw 2 and an elastic limit retaining spring 3. A center hole 4 is provided in the column 1. The upper part of the center hole 4 is conical. A center screw hole 16 connected to the center hole 4 is provided in the upper part of the column 1. An internal thread 5 is provided on the inner wall of the lower part of the center hole 4 of the column 1. The adjusting screw 2 is screwed onto the internal thread 5 of the center hole 4 of the column 1 through its external thread 6. A through hole 7 is provided in the adjusting screw 2. An annular baffle 9 is provided on the upper part of the column 1. Flower teeth 17 are provided on the outer peripheral wall of the column 1 below the annular baffle 9. An annular limit plate 8 is provided at the bottom of the adjusting screw 2. Anti-slip patterns 18 are provided on the bottom surfaces of the adjusting screw 2 and the annular limit plate 8. Figure 4 As shown, the elastic limit clamp spring 3 is annular, the elastic limit clamp spring 3 is made of steel, a fracture 10 is provided on the elastic limit clamp spring 3, a positioning plate 11 is provided on the outer periphery of the elastic limit clamp spring 3, the positioning plates 11 are evenly distributed along the circumferential direction, the number of the positioning plates 11 is 3 to 6, a positioning groove 12 is provided on the inner wall of the through hole 7 of the adjusting screw 2, the positioning groove 12 is annular, the elastic limit clamp spring 3 is located in the through hole 7 of the adjusting screw 2, and is clamped by the positioning plate 11 In the positioning groove 12, an arc-shaped spring piece 13 is arranged on the upper part of the elastic limiting spring 3, and the arc-shaped spring piece 13 is evenly distributed along the circumferential direction. The number of the arc-shaped spring pieces 13 is 3 to 6, and a limiting plate 14 is arranged at the upper end of the arc-shaped spring piece 13. A limiting groove 19 is opened at the top of the adjusting screw 2. The limiting plates 14 at the upper end of the arc-shaped spring piece 13 are respectively located in the limiting groove 19, and an annular step surface 15 corresponding to the limiting plate 14 is arranged on the inner wall of the center hole 4 of the column 1.

[0023] When the heavy-load anti-loosening elastic limit tolerance adjuster is used to fix the battery pack on the frame of an electric vehicle, a plurality of lifting ears are firstly provided on the battery pack, and a first connecting hole is opened on the lifting ears, and a second connecting hole coaxial with the first connecting hole of the lifting ears is opened on the frame, and then Figure 1The tolerance adjuster is rotated 180° and turned upside down, then the adjusting screw 2 is removed from the column 1, and then the column 1 is inserted into the first connecting hole of the battery pack ear from bottom to top, and upward pressure is applied to the column 1, so that the flower teeth 17 on the outer peripheral wall of the column 1 are forcibly embedded in the inner peripheral wall of the first connecting hole of the battery pack ear, and at the same time, the end face of the annular baffle 9 is in contact with the ear. The flower teeth 17 have a good anti-loosening effect on the column 1, and the annular baffle 9 has a supporting effect on the battery pack after installation. Then the adjusting screw 2 is screwed onto the internal thread 5 of the center hole 4 of the column 1, and the battery pack is lifted up by the lifting equipment so that the distance between the lifting ear of the battery pack and the bottom surface of the frame reaches a preset value. At this time, the annular limit plate 8 of the adjusting screw 2 does not contact the bottom surface of the frame. Then, the staff takes a wrench, passes the wrench head through the second connecting hole of the frame, and then inserts it into the through hole 7 of the adjusting screw 2, and clamps it between the arc-shaped spring pieces 13. The wrench head is clamped by the arc-shaped spring pieces 13. At this time, under the squeezing effect of the wrench head on the arc-shaped spring piece 13, the arc-shaped spring piece 13 is deformed, thereby driving the limit plate 14 at the upper end of the arc-shaped spring piece 13 to expand outward, so that the outer end of the limit plate 14 moves to above the annular step surface 15. Then, the adjusting screw 2 is rotated by a wrench to move the adjusting screw 2 in a direction away from the central screw hole 16 until the adjusting screw 2 and the anti-skid pattern 18 of the annular limiting plate 8 contact the bottom surface of the vehicle frame. At this time, if the adjusting screw 2 is continued to be rotated by the wrench, the torque required for rotation increases, and the clamping force of the arc spring piece 13 on the wrench head is less than the rotation torque, so that the wrench head overcomes the friction between the arc spring piece 13 and slips, achieving the function of torque limitation, so that the adjusting screw 2 can no longer continue to move in the direction of the vehicle frame, avoiding damaging the lifting ear of the battery pack. During the movement of the adjusting screw 2, if the outer end of the limiting plate 14 contacts the annular step surface 15 of the column 1, the adjusting screw 2 can no longer be rotated, so that the adjusting screw 2 cannot be detached from the column 1, achieving the purpose of limiting the adjusting screw 2, and avoiding the phenomenon of the adjusting screw 2 being unscrewed from the column 1 if the tolerance is too large. Next, take the bolts and nuts used to fasten the battery pack, and pass the bolts through the second connection hole of the frame, the through hole 7 of the adjusting screw 2, and the center hole 4 of the column 1 in sequence, then screw them into the center screw hole 16 of the column 1 and pass them out from the center screw hole 16, then screw the nut onto the part where the bolt passes through, and make the nut close to the end face of the column 1, and complete the fixed installation of the battery pack. It should be noted that during the process of rotating and adjusting the adjusting screw 2, if the outer end of the limit plate 14 contacts the annular step surface 15 of the column 1, it means that the adjusting screw 2 has moved to the maximum stroke. If the anti-skid pattern 18 on the adjusting screw 2 and the annular limit plate 8 has not yet contacted the bottom surface of the frame, the adjusting screw 2 should not be rotated any more, but the bolts and nuts should be tightened forcibly to deform the hanging ears of the battery pack so that the anti-skid pattern 18 on the adjusting screw 2 and the annular limit plate 8 contact the bottom surface of the frame.

Claims

1. Heavy-load anti-loosening elastic limit tolerance adjuster, characterized by: The cam is provided with a central hole, and an inner wall of the central hole of the cylinder is provided with an inner thread. The adjusting screw is screwed on the inner thread of the central hole of the cylinder through its outer thread. A through hole is provided in the adjusting screw, and an annular baffle is provided on the upper part of the cylinder. The elastic limiting clamping spring is annular, and a fracture is provided on the elastic limiting clamping spring. A positioning plate is provided on the outer peripheral part of the elastic limiting clamping spring. A positioning groove is provided on the inner wall of the through hole of the adjusting screw. The elastic limiting clamping spring is located in the through hole of the adjusting screw and is clamped in the positioning groove through the positioning plate. An arc spring piece is provided on the upper part of the elastic limiting clamping spring, and a limiting plate is provided on the upper end part of the arc spring piece. An annular step surface corresponding to the limiting plate is provided on the inner wall of the central hole of the cylinder, a central screw hole connected with the central hole is provided in the upper part of the cylinder, and a flower tooth is provided on the outer peripheral wall of the cylinder below the annular baffle.

2. The heavy-load anti-loosening elastic limit tolerance adjuster according to claim 1 is characterized in that: A limiting groove is provided on the top of the adjusting screw, and the limiting plates at the upper ends of the arc-shaped spring pieces are respectively located in the limiting grooves, and the positioning groove on the inner wall of the through hole of the adjusting screw is annular.

3. The heavy-load anti-loosening elastic limit tolerance adjuster according to claim 1 or 2, characterized in that: An annular limiting plate is arranged at the bottom of the adjusting screw.

4. The heavy-load anti-loosening elastic limit tolerance adjuster according to claim 3 is characterized in that: Anti-slip grooves are arranged on the bottom surfaces of the adjusting screw and the annular limiting plate.

5. The heavy-load anti-loosening elastic limit tolerance adjuster according to claim 1 or 2, characterized in that: The upper part of the central hole of the column is cone-shaped.

6. The heavy-load anti-loosening elastic limit tolerance adjuster according to claim 1 or 2, characterized in that: The positioning plates on the elastic limit clamp spring are evenly distributed along the circumferential direction, and the number of the positioning plates is 3 to 6. The arc-shaped spring pieces on the elastic limit clamp spring are evenly distributed along the circumferential direction, and the number of the arc-shaped spring pieces is 3 to 6.

7. The heavy-load anti-loosening elastic limit tolerance adjuster according to claim 1 or 2, characterized in that: The elastic limiting clamping spring is made of steel.

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