Adjustable spline pair limiting device

Abstract

The utility model discloses an adjustable spline pair limiting device which comprises a base, a pin shaft, a connecting rod, a nut I, a screw rod, a connecting block and at least two nuts II which are arranged from left to right. The left end of the connecting rod is connected with the base through a pin shaft, and the right end of the connecting rod is connected with the screw rod and locked through a nut I. The right end of the screw rod penetrates through the connecting block and is tightened through a left nut II and a right nut II. The spline pair limiting device is used for limiting expansion and contraction of the spline pair in the transportation and installation process, and equipment damage and personnel injury caused by expansion and contraction and even falling of the spline pair are avoided.

Description

Technical Field

[0001] The utility model belongs to the field of transmission shaft design, and more specifically relates to an adjustable spline pair limiting device. Background Art

[0002] Spline pairs are common components in mechanical transmission systems. They have the characteristics of large torque transmission, high transmission efficiency, high positioning accuracy, good synchronization performance and long service life. They can be widely used in automobile, metallurgy and other fields.

[0003] The spline pair achieves the length compensation of the transmission system through the relative sliding of the inner and outer splines, so the connected parts generally need to be axially fixed. However, the spline pair and the transmission shaft containing the spline pair are difficult to fix axially during transportation and installation, and are prone to expansion and contraction or even fall off, causing equipment damage and personal injury. Therefore, it is necessary to design an adjustable spline pair limit device to prevent the spline pair from expanding and contracting abnormally. Summary of the invention

[0004] The problem to be solved by the utility model is to provide an adjustable spline pair limiting device, which is used to limit the expansion and contraction of the spline pair during transportation and installation, so as to avoid equipment damage and personal injury caused by the expansion and contraction or even falling off of the spline pair.

[0005] The utility model discloses an adjustable spline pair limiting device, which comprises a base, a pin shaft, a connecting rod, a nut I, a screw rod, a connecting block and at least two nuts II which are arranged from left to right; the left end of the connecting rod is connected to the base through the pin shaft, the right end of the connecting rod is connected to the screw rod and is locked through the nut I, and the right end of the screw rod passes through the connecting block and is tightened through the left and right nuts II.

[0006] Furthermore, the base includes a bottom plate and a column. The column is fixed on the right side of the bottom plate and is provided with a U-shaped opening groove I. The upper and lower sides of the U-shaped opening groove I are provided with through holes I; a vertical through hole is provided at the center of the left end of the connecting rod, and a horizontal threaded hole is provided at the right end; the left end of the connecting rod is located in the U-shaped opening groove I, and the pin passes through the through hole I and the vertical through hole to connect the base and the connecting rod; the connecting block is provided with a U-shaped opening groove II; the left end of the screw rod is connected to the horizontal threaded hole, and the right end passes through the U-shaped opening groove II, and the left and right nuts II are screwed on the screw rod and pressed on the left and right end faces of the connecting block.

[0007] Furthermore, the left end of the connecting rod extending into the U-shaped opening groove I is arc-shaped.

[0008] Furthermore, the spline pair limit device also includes a washer and a cotter pin; the pin shaft is a stepped shaft, and its step surface is pressed under the U-shaped opening groove I. The small diameter section passes through a through hole I, a vertical through hole, and another through hole I, and then extends out of the U-shaped opening groove I. The cotter pin passes through the radial through hole of the pin shaft and is positioned; the washer is installed between the base and the cotter pin.

[0009] Furthermore, the spline pair limiting device also includes a bolt, and the upper and lower end faces of the U-shaped opening groove II are respectively provided with a through hole II and a threaded hole. After the bolt passes through the through hole II and the U-shaped opening groove II, it is screwed into the threaded hole and tightly against the outside of the screw rod. The left and right nuts II simultaneously tighten the end faces of the bolt and the connecting block.

[0010] Furthermore, the bolt is a reamed hole bolt, which is matched with the through hole II with a small clearance.

[0011] Furthermore, the opening directions of the U-shaped opening groove I and the U-shaped opening groove II are consistent.

[0012] Furthermore, the base, the connecting block and the inner and outer splines of the spline pair are connected by bolts or welding.

[0013] The beneficial effects of the spline pair limit device of the utility model are as follows: 1. After the base and the connecting block of the limit device are respectively connected to the two sides of the spline pair, the abnormal axial expansion and contraction of the spline pair can be limited during the transportation and installation process; 2. The distance between the base and the connecting block can be adjusted to meet the limit needs of spline pairs of different lengths; 3. The opening directions of the U-shaped opening groove I and the U-shaped opening groove II are consistent, which is convenient for adjusting the length of the spline pair. In short, the utility model can reliably limit the spline pairs of different lengths to avoid equipment damage and personal injury caused by spline sliding or falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the spline auxiliary limiting device of the utility model;

[0015] Figure 2 for Figure 1 A top view of

[0016] Figure 3 For along Figure 1 Centerline cross-section view;

[0017] Figure 4 A three-dimensional diagram of the base;

[0018] Figure 5 It is a three-dimensional diagram of the connecting rod;

[0019] Figure 6 It is a three-dimensional diagram of the connection block;

[0020] Figure 7 It is a schematic diagram of the connection between the utility model and the spline pair. DETAILED DESCRIPTION

[0021] Example 1

[0022] from Figure 1 , Figure 2 , Figure 3It can be seen that the utility model is an adjustable spline pair limit device, which includes a base 1, a pin 2, a connecting rod 5, a nut I6, a screw 7, a connecting block 8, and at least two nuts II10 arranged from left to right; the left end of the connecting rod 5 is connected to the base 1 through the pin 2, and the right end is connected to the screw 7 and locked by the nut I6, and the right end of the screw 7 passes through the connecting block 8 and is tightened by the left and right nuts II10.

[0023] The base 1, connecting rod 5, screw rod 7 and connecting block 8 in the spline pair limiting device of the utility model are connected as a whole, and the distance between the base 1 and the connecting block 8 is relatively fixed; when the base 1 and the connecting block 8 are respectively connected to the two sides of the spline pair, the abnormal axial expansion and contraction of the spline pair can be limited during the transportation and installation process, preventing the spline pair from falling off and causing equipment damage and personal injury. After the transportation and installation of the spline pair are completed, the spline pair limiting device is disassembled from the spline pair to ensure the normal operation of the spline pair.

[0024] The left and right nuts II10 are loosened, and the connecting block 8 is moved left and right relative to the screw rod 7, and then the left and right nuts II10 are tightened. In this way, the length of the entire spline pair limiting device can be adjusted according to the length of the spline pair, thereby adapting to the limiting needs of spline pairs of different lengths.

[0025] Example 2

[0026] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 It can be seen that the spline pair limit device of the utility model: the base 1 includes a bottom plate 101 and a column 102, the column 102 is fixed on the right side of the bottom plate 101, and is provided with a U-shaped opening groove Ⅰ103, and the upper and lower surfaces of the U-shaped opening groove Ⅰ103 are provided with through holes Ⅰ104; a vertical through hole 501 is provided at the center of the left end of the connecting rod 5, and a horizontal threaded hole 502 is provided at the right end; the left end of the connecting rod 5 is located in the U-shaped opening groove Ⅰ103, and the pin 2 passes through the through hole Ⅰ104 and the vertical through hole 501 to connect the base 1 with the connecting rod 5; the connecting block 8 is provided with a U-shaped opening groove Ⅱ801; the left end of the screw rod 7 is connected to the horizontal threaded hole 502, and the right end passes through the U-shaped opening groove Ⅱ801, and the left and right nuts Ⅱ10 are screwed on the screw rod 7 and pressed on the left and right end faces of the connecting block 8.

[0027] The bottom plate 101 and the columns 102 can be integrally formed or welded together.

[0028] During transportation, the spline pair may undergo a certain axial movement due to vibration. The connecting rod 5 can compensate for this by rotating around the base 1 within a certain angle through the pin 2, thereby avoiding damage to the spline pair.

[0029] Example 3

[0030] from Figure 1 , Figure 2 , Figure 3 , Figure 5 It can be seen that in the spline pair limiting device of the present invention, the left end of the connecting rod 5 extending into the U-shaped opening groove Ⅰ103 is in an arc shape.

[0031] The left end of the connecting rod 5 is in an arc shape, so as to avoid interference between the connecting rod 5 and the base 1 when the connecting rod 5 rotates through the pin shaft 2 .

[0032] Example 4

[0033] from Figure 1 , Figure 2 , Figure 3 It can be seen that the spline pair limit device of the utility model also includes a washer 3 and a cotter pin 4; the pin shaft 2 is a stepped shaft, and its step surface is pressed under the U-shaped opening groove Ⅰ103. The small diameter section passes through a through hole Ⅰ104, a vertical through hole 501, and another through hole Ⅰ104 and then extends out of the U-shaped opening groove Ⅰ103. The cotter pin 4 passes through the radial through hole of the pin shaft 2 and is positioned; the washer 3 is installed between the base 1 and the cotter pin 4.

[0034] The provision of the pin shaft 2 enables the connection and rotation of the connecting rod 5 and the base 1 , and the provision of the cotter pin 4 facilitates the installation and fastening of the pin shaft 2 , thereby facilitating the installation and disassembly between the connecting rod 5 and the base 1 .

[0035] Example 5

[0036] from Figure 1 , Figure 2 , Figure 3 , Figure 6 It can be seen that the spline pair limiting device of the utility model also includes a bolt 9, and the upper and lower end faces of the U-shaped opening groove II801 are respectively provided with a through hole II802 and a threaded hole 803. After the bolt 9 passes through the through hole II802 and the U-shaped opening groove II801, it is screwed into the threaded hole 803 and closely abuts against the outer side of the screw rod 7. The left and right nuts II10 simultaneously tighten the end faces of the bolt 9 and the connecting block 8.

[0037] During transportation, the nut 6 may become loose due to vibration, and the portion of the screw rod 7 located in the U-shaped opening groove II 801 may come out. The bolt 9 is installed to close the U-shaped opening groove II 801, so that the screw rod 7 is fixed in the opening groove II 801 and cannot come out, further improving the connection reliability between the screw rod 7 and the connecting block 8. After the bolt 9 is loosened, the assembly formed by the connecting rod 5 and the screw rod 7 can be rotated around the axis of the pin 2 to disengage from the U-shaped opening groove II 801, making it easy to adjust the overall length.

[0038] Example 6

[0039] The spline pair limiting device of the utility model: the bolt 9 is a reamed hole bolt, which is matched with the through hole II 802 with a small gap.

[0040] The small clearance between the bolt 9 and the through hole 802 can prevent the bolt 9 from colliding and breaking with the screw rod 7, causing the screw rod 7 to separate from the connecting block 8 and lose its limiting function, thereby improving the connection reliability.

[0041] Example 7

[0042] from Figure 1 , Figure 2 , Figure 3 It can be seen that in the spline pair limiting device of the present invention, the opening directions of the U-shaped opening groove Ⅰ103 and the U-shaped opening groove Ⅱ801 are consistent.

[0043] The opening directions of the U-shaped opening groove I103 and the U-shaped opening groove II801 are consistent, so that the connecting rod 5 and the screw rod 7 can be quickly disassembled along the U-shaped groove opening, which is convenient for adjusting the length of the spline pair.

[0044] Example 8

[0045] from Figure 7 It can be known that in the spline pair limiting device of the present invention, the base 1, the connecting block 8 and the inner and outer splines of the spline pair 11 are connected by bolts or welding.

[0046] The advantages of the spline pair limiting device of the utility model are: first, the base 1, the connecting rod 5, the screw rod 7, and the connecting block 8 are connected into a whole, and the distance between the base 1 and the connecting block 8 is relatively fixed; when the base 1 and the connecting block 8 are respectively connected to the two sides of the spline pair, the abnormal axial expansion and contraction of the spline pair can be limited during the transportation and installation processes; second, the connecting rod 5 can rotate around the base 1 within a certain angle through the pin shaft 2, so that a certain axial movement of the spline pair caused by vibration during transportation is compensated, thereby avoiding damage to the spline pair; third, loosen the left and right nuts II10, and then tighten the left and right nuts II10 after the connecting block 8 moves left and right relative to the screw rod 7; in this way, the distance between the base 1 and the connecting block 8 can be adjusted, so as to meet the limiting needs of spline pairs of different lengths; fourth, the opening direction of the U-shaped opening groove I103 is consistent with that of the U-shaped opening groove II801, so that the connecting rod 5 and the screw rod 7 can be quickly disassembled along the opening of the U-shaped groove, which is convenient for adjusting the length of the spline pair. After the spline pair is transported and installed, the spline pair limit device is removed from the spline pair to ensure the normal operation of the spline pair.

[0047] In short, the spline pair limiting device of the utility model can reliably limit the spline pairs of different lengths, thereby preventing the splines from sliding or falling off and causing damage to equipment and personal injury.

Claims

1. An adjustable spline limit device, characterized by: The invention comprises a base (1), a pin (2), a connecting rod (5), a nut I (6), a screw rod (7), a connecting block (8), and at least two nuts II (10) arranged from left to right; the left end of the connecting rod (5) is connected to the base (1) through the pin (2), and the right end is connected to the screw rod (7) and is locked by the nut I (6); the right end of the screw rod (7) passes through the connecting block (8) and is locked by the two left and right nuts II (10).

2. The spline pair limit device according to claim 1 is characterized in that: The base 1 comprises a bottom plate (101) and a column (102). The column (102) is fixed on the right side of the bottom plate (101) and is provided with a U-shaped opening groove I (103). The upper and lower sides of the U-shaped opening groove I (103) are both provided with through holes I (104). A vertical through hole (501) is provided at the center of the left end of the connecting rod (5), and a horizontal threaded hole (502) is provided at the right end. The left end of the connecting rod (5) is located in the U-shaped opening groove I. (103), the pin shaft (2) passes through the through hole I (104) and the vertical through hole (501) to connect the base (1) and the connecting rod (5); the connecting block (8) is provided with a U-shaped opening groove II (801); the left end of the screw rod (7) is connected to the horizontal threaded hole (502), and the right end passes through the U-shaped opening groove II (801), and the left and right nuts II (10) are screwed on the screw rod (7) and pressed on the left and right end faces of the connecting block (8).

3. The spline pair limit device according to claim 2 is characterized in that: The left end of the connecting rod (5) extending into the U-shaped opening groove I (103) is in an arc shape.

4. The spline pair limit device according to claim 2 is characterized in that: The spline pair limiting device also includes a washer (3) and a cotter pin (4); the pin shaft (2) is a stepped shaft, the step surface of which is pressed under the U-shaped opening groove I (103); the small diameter section passes through a through hole I (104), a vertical through hole (501), and another through hole I (104), and then extends out of the U-shaped opening groove I (103); the cotter pin (4) passes through the radial through hole of the pin shaft (2) and is positioned; the washer (3) is installed between the base (1) and the cotter pin (4).

5. The spline pair limit device according to claim 1 is characterized in that: The spline pair limiting device also includes a bolt (9). The upper and lower end surfaces of the U-shaped opening groove II (801) are respectively provided with a through hole II (802) and a threaded hole (803). After the bolt (9) passes through the through hole II (802) and the U-shaped opening groove II (801), it is screwed into the threaded hole (803) and closely abuts against the outer side of the screw rod (7). The left and right nuts II (10) simultaneously press the bolt (9) and the end surface of the connecting block (8).

6. The spline pair limiting device according to claim 5 is characterized in that: The bolt (9) is a reamed hole bolt, which is matched with the through hole II (802) with a small clearance.

7. The spline pair limit device according to claim 5 is characterized in that: The opening directions of the U-shaped opening groove (I) 103 and the U-shaped opening groove II (801) are consistent.

8. The spline pair limit device according to claim 1 is characterized in that: The base (1), the connecting block (8) and the inner and outer splines of the spline pair (11) are connected by bolts or welding.

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