A multifunctional measuring device for detecting a transfer case

Abstract

The present invention provides a multifunctional measuring device for detecting a transfer case, comprising: a mounting position; a first measuring mechanism, including a first displacement detection head, a first displacement sensor connected to the first displacement detection head, a second displacement detection head, and a second displacement sensor connected to the second displacement detection head; a second measuring mechanism, including a rotary driving member, a housing, a rotating shaft, and a nut sleeve cooperating with a flange, the rotating shaft being located inside the housing, one end of which is connected to the rotary driving member through a torque sensor, and the other end being movably connected to the nut sleeve; a core expander is further provided on the outer side of the nut sleeve, one end of the core expander is provided with an expanding sleeve, and the other end is connected to the rotating shaft; a third displacement sensor is also connected to the housing; a moving mechanism. The beneficial effects of the present invention are as follows: by providing the first measuring mechanism and the second measuring mechanism, the detection of three items is completed automatically, the device is easy to operate, the product consistency is greatly improved, and it is beneficial to improve the product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of transfer cases, and in particular to a multi-functional measuring device for detecting transfer cases. Background Art

[0002] In a multi-axle drive vehicle, a transfer case is generally provided to distribute the output power to each drive axle. During the assembly process of the transfer case, the preload of the pinion gear, flange runout, the installation position of the pinion gear, etc. are all key process parameters that need to be controlled within a certain tolerance range. If the above-mentioned values are too large or too small, it will affect the performance of the four-wheel drive assembly. Therefore, it is necessary to measure the above items after the relevant parts are assembled. If the measurement result is not within the qualified range, rework is required. In the prior art, some of the above items are measured manually, with relatively large measurement errors and poor consistency; some items need to be measured separately by different devices, resulting in low production efficiency and high equipment input costs. Summary of the Invention

[0003] Aiming at the above defects, the purpose of the present invention is to provide a multi-functional measuring device for detecting transfer cases, which can automatically measure three items: the preload of the pinion gear, flange runout, and the installation position of the pinion gear, and the detection result has high accuracy.

[0004] The present invention provides a multifunctional measuring device for detecting a transfer case. The transfer case semi-finished product includes a housing, a pinion shaft, and a pinion gear disposed in the housing. One end of the pinion shaft is connected to the pinion gear, and the other end is connected to a flange disposed outside the housing. The housing includes a first inner circular hole and a second inner circular hole coaxially arranged from outside to inside, and the first inner circular hole and the second inner circular hole are communicated with each other. The multifunctional measuring device includes: a mounting position for positioning the transfer case semi-finished product; a first measuring mechanism located above the mounting position, which includes a first displacement detection head driven by a first driving member, a first displacement sensor connected to the first displacement detection head, a second displacement detection head driven by a second driving member, and a second displacement sensor connected to the second displacement detection head. The first displacement detection head and the first displacement sensor are used to detect the position of the center hole of the pinion gear, and the second displacement detection head and the second displacement sensor determine the center line of the housing by detecting the positions of the first inner circular hole and the second inner circular hole; a second measuring mechanism, which includes a rotary driving member, a housing, a rotary shaft, and a nut sleeve that cooperates with the flange. The rotary shaft is located inside the housing, one end of which is connected to the rotary driving member through a torque sensor, and the other end is movably connected to the nut sleeve; a core expander is further provided outside the nut sleeve, one end of the core expander is provided with a core expanding sleeve for locking the flange, and the other end is connected to the rotary shaft; a third displacement sensor is further connected to the housing, and the third displacement sensor is used to detect the end face runout of the flange; a moving mechanism for driving the second measuring mechanism to approach or move away from the mounting position.

[0005] Preferably, the multifunctional measuring device further includes a lifting mechanism, the mounting position is arranged in the lifting mechanism, and the lifting mechanism is used to drive the mounting position to approach or move away from the first measuring mechanism.

[0006] Preferably, the first displacement detection head is connected to a workpiece detection head through a bracket, and the workpiece detection head is used to contact the pinion gear.

[0007] Preferably, the first driving member and the second driving member are cylinders, linear motors or hydraulic cylinders.

[0008] Preferably, the moving mechanism is a ball screw.

[0009] The beneficial effects of the present invention are as follows: 1. By setting the first measuring mechanism and the second measuring mechanism, three items of detection are automatically completed, reducing the number of operators and greatly improving the production efficiency at the same time; 2. The measurement result has high accuracy; 3. The device is easy to operate, greatly reducing the requirements for operators, greatly improving the product consistency, and being beneficial to product quality control and quality improvement. Description of the Drawings

[0010] Figure 1 It is a schematic structural diagram of the multi-functional measuring device of the present invention;

[0011] Figure 2 It is a cross-sectional view of the transfer case semi-finished product;

[0012] Figure 3 It is a schematic working state diagram when the first measuring mechanism detects the position of the center hole of the pinion gear;

[0013] Figure 4 It is Figure 3 an enlarged schematic view of part A in

[0014] Figure 5 It is a schematic working state diagram when the first measuring mechanism detects the center line of the housing;

[0015] Figure 6 It is Figure 5 an enlarged schematic view of part B in

[0016] Figure 7 It is a cross-sectional view of the second measuring mechanism;

[0017] Figure 8 It is Figure 7 an enlarged schematic view of part C in

[0018] Description of component labels:

[0019] 1 Transfer case semi-finished product

[0020] 11 Housing

[0021] 111 First inner round hole

[0022] 112 Second inner round hole

[0023] 12 Pinion gear

[0024] 13 Pinion shaft

[0025] 14 Flange

[0026] 2 Frame

[0027] 3 Lifting mechanism

[0028] 31 Mounting position

[0029] 4 First measuring mechanism

[0030] 41 Connecting rod

[0031] 42 First displacement sensor

[0032] 43 Bracket

[0033] 44 Workpiece detection head

[0034] 45 First displacement detection head

[0035] 46 First driving member

[0036] 47 Second driving member

[0037] 48 Second displacement detection head

[0038] 49 Second displacement sensor

[0039] 5 Moving mechanism

[0040] 6 Second measuring mechanism

[0041] 61 Rotation driving member

[0042] 62 Housing

[0043] 63 Coupling

[0044] 64 Torque sensor

[0045] 65 Rotating shaft

[0046] 66 Nut sleeve

[0047] 661 Groove

[0048] 67 Expanding core

[0049] 68 Expanding sleeve

[0050] 69 Third displacement sensor Specific embodiments

[0051] The following further details the specific embodiments of the present invention with reference to the accompanying drawings. These embodiments are only for illustrating the present invention and are not intended to limit the present invention.

[0052] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0055] As Figure 2 shown, the existing transfer case semi-finished product 1 includes a housing 11, a pinion shaft 13, and a pinion 12 disposed in the housing 11. One end of the pinion shaft 13 is connected to the pinion 12, and the other end is connected to a flange 14 disposed outside the housing 11. The housing 11 includes a first inner circular hole 111 and a second inner circular hole 112 coaxially arranged from outside to inside. The first inner circular hole 111 and the second inner circular hole 112 are in communication with each other and are used to accommodate subsequent transfer case components. To ensure the accurate assembly of the transfer case, the present invention provides a multifunctional measuring device for detecting the transfer case. The device is as Figure 1 shown and includes a lifting mechanism 3, a first measuring mechanism 4, a moving mechanism 5, and a second measuring mechanism 6 disposed in a frame 2. During operation, the transfer case semi-finished product 1 is placed in the installation position 31 of the lifting mechanism 3. The lifting mechanism 3 drives the transfer case semi-finished product 1 to reach the measuring position. Then, the first measuring mechanism 4 detects the center hole position of the pinion 12 and the center line of the housing 11 to determine the installation position of the pinion. The second measuring mechanism 6 detects the preload of the pinion and the flange runout, realizing the full-automatic measurement of three items of the transfer case semi-finished product 1.

[0056] As Figure 1 shown, the lifting mechanism 3 includes an installation position 31 and a linear driving member. The installation position 31 can be in the form of a tray or a positioning bracket, etc. The linear driving member drives the installation position 31 to move up and down, approaching or moving away from the first measuring mechanism 4.

[0057] As Figure 3 and Figure 4As shown in the figure, the first measuring mechanism 4 is located above the installation position 31. A measuring part for extending into the interior of the housing 11 for measurement is provided at the bottom thereof, and the shape of the measuring part is adapted to the internal shape of the housing 11. A first displacement detection head 45 driven by a first driving member 46 is provided in the middle of the measuring part. The first displacement detection head 45 is connected to a workpiece detection head 44 through a C-shaped bracket 43. The workpiece detection head 44 extends out of the measuring part and is used to contact the central hole of the pinion 12. At the same time, the first displacement detection head 45 is electrically connected to a first displacement sensor 42, and the first displacement sensor 42 is fixed on a connecting rod 41 located in the middle of the measuring part. During operation, the first driving member 46 drives the first displacement detection head 45 and the workpiece detection head 44 to approach the pinion 12 simultaneously. When the workpiece detection head 44 contacts the central hole of the workpiece detection head 44, the movement of the workpiece detection head 44 is blocked. At this time, the first displacement detection head 45 can transmit displacement information to the first displacement sensor 42, thereby obtaining the position information of the central hole of the pinion 12. Those skilled in the art can also remove the bracket 43 and the workpiece detection head 44 according to needs, so that the first displacement detection head 45 directly contacts the pinion 12.

[0058] As Figure 5 and Figure 6 shown in the figure, at the top edge and the bottom edge of the measuring part, that is, at the parts where the measuring part is adapted to the first inner circular hole 111 and the second inner circular hole 112, a plurality of groups of second driving members 47, second displacement detection heads 48 and second displacement sensors 49 are respectively provided. The second driving member 47 drives the second displacement detection head 48 to move outward, and the second displacement detection head 48 and the second displacement sensor 49 are electrically connected. In a specific embodiment of the present invention, a total of six groups of second driving members 47, second displacement detection heads 48 and second displacement sensors 49 are provided, three of which are arranged at intervals at the first inner circular hole 111, and the other three are arranged at intervals at the second inner circular hole 112. The measurement principle is: the center position of the first inner circular hole 111 / the second inner circular hole 112 is determined by the position information of three points, and then the center line of the housing 11 is obtained.

[0059] The forms of the first driving member 46 and the second driving member 47 are not limited, and both can be cylinders, linear motors or hydraulic cylinders, etc.

[0060] As Figure 7 and Figure 8As shown, the second measuring mechanism 6 includes a rotation driving member 61, a housing 62, a rotating shaft 65, and a nut sleeve 66 that cooperates with the flange 14. The rotating shaft 65 is located inside the housing 62, one end of which is connected to the rotation driving member 61 through a torque sensor 64, and the other end is movably connected to the nut sleeve 66. Specifically, a slot 661 is provided inside the nut sleeve 66, the end of the rotating shaft 65 is located inside the slot 661, and the rotating shaft 65 is elastically connected to the nut sleeve 66 through a spring. A core expander 67 is further provided outside the nut sleeve 66. One end of the core expander 67 is provided with a sleeve 68 for locking the flange 14, and the other end is connected to the rotating shaft 65. A third displacement sensor 69 is also connected to the housing 62. The third displacement sensor 69 is located above the nut sleeve 66 and is used to detect the end face runout of the flange 14. As Figure 1 shown, the moving mechanism 5 is used to drive the second measuring mechanism 6 to approach or move away from the installation position 31, and it is preferably a ball screw.

[0061] The usage method of the multifunctional measuring device of the present invention is as follows:

[0062] Place the transfer case semi-finished product 1 in the installation position 31, and move the installation position 31 to the measuring position under the drive of the lifting mechanism 3.

[0063] The first measuring mechanism 4 works to detect the position of the center hole of the pinion 12 and determine the center line of the housing 11.

[0064] The moving mechanism 5 works to drive the second measuring mechanism 6 to approach the transfer case semi-finished product 1. The nut sleeve 66 is first inserted into the flange 14 and the nut sleeve 66 is limited. Then, under the continuous drive of the moving mechanism 5, the rotating shaft 65 compresses the spring, and its end extends into the slot 661. At this time, the core expander 67 squeezes the sleeve 68, and the sleeve 68 expands outward to lock the flange 14, and the relative position between the nut sleeve 66 and the flange 14 is fixed.

[0065] The rotation driving member 61 drives the pinion 12 to rotate through the flange 14 and the pinion shaft 13, and its rotation speed can be controlled according to the detection result of the torque sensor 64 to complete the preload measurement of the pinion 12. During this process, the third displacement sensor 69 works to detect the end face runout of the flange 14 during rotation.

[0066] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-functional measuring device for detecting a transfer case, the transfer case semi-finished product (1) comprising a housing (11), a pinion shaft (13), and a pinion (12) disposed in the housing (11), one end of the pinion shaft (13) being connected to the pinion (12), and the other end being connected to a flange (14) disposed outside the housing (11); the housing (11) includes a first inner circular hole (111) and a second inner circular hole (112) coaxially arranged from outside to inside, and the first inner circular hole (111) and the second inner circular hole (112) are in communication; characterized in that, The multifunctional measuring device includes: a mounting position (31) for positioning the transfer case semi-finished product (1); a first measuring mechanism (4) located above the mounting position (31), which includes a first displacement detection head (45) driven by a first driving member (46), a first displacement sensor (42) connected to the first displacement detection head (45), a second displacement detection head (48) driven by a second driving member (47), and a second displacement sensor (49) connected to the second displacement detection head (48). The first displacement detection head (45) and the first displacement sensor (42) are used to detect the center hole position of the pinion gear (12), and the second displacement detection head (48) and the second displacement sensor (49) determine the center line of the housing (11) by detecting the positions of the first inner circular hole (111) and the second inner circular hole (112); a second measuring mechanism (6), which includes a rotation driving member (61), a housing (62), a rotating shaft (65), and a nut sleeve (66) that cooperates with the flange (14). The rotating shaft (65) is located inside the housing (62), one end of which is connected to the rotation driving member (61) through a torque sensor (64), and the other end is movably connected to the nut sleeve (66). A core expanding member (67) is further provided outside the nut sleeve (66). One end of the core expanding member (67) is provided with a core expanding sleeve (68) for locking the flange (14), and the other end is connected to the rotating shaft (65). A third displacement sensor (69) is also connected to the housing (62), and the third displacement sensor (69) is used to detect the end face runout of the flange (14); a moving mechanism (5) for driving the second measuring mechanism (6) to approach or move away from the mounting position (31).

2. The multifunctional measuring device according to claim 1, characterized in that, The multifunctional measuring device further includes a lifting mechanism (3). The mounting position (31) is arranged in the lifting mechanism (3), and the lifting mechanism (3) is used to drive the mounting position (31) to approach or move away from the first measuring mechanism (4).

3. The multifunctional measuring device according to claim 1, characterized in that, The first displacement detection head (45) is connected to a workpiece detection head (44) through a bracket (43), and the workpiece detection head (44) is used to contact the pinion gear (12).

4. The multifunctional measuring device according to claim 1, characterized in that, The first driving member (46) and the second driving member (47) are cylinders, linear motors or hydraulic cylinders.

5. The multi-functional measuring device according to claim 1, characterized in that, The moving mechanism (5) is a ball screw.

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