CN216770438U

CN216770438U - Differential gear backlash measuring device

Info

Publication number: CN216770438U
Application number: CN202123348348.4U
Authority: CN
Inventors: 龚家林; 史香云; 周晓冬; 鲍益智
Original assignee: Shanghai GKN Huayu Driveline Systems Co Ltd
Current assignee: Shanghai GKN Huayu Driveline Systems Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-17
Anticipated expiration: 2031-12-28

Abstract

The utility model provides a differential backlash measuring device, comprising: the top of the table top is provided with a guide rail and a clamping seat, and the guide rail is connected with a sliding block in a sliding manner; the tensioning mechanism comprises a screw rod and a rotating shaft sleeved outside the screw rod, wherein a first end of the screw rod is in threaded connection with an expansion core, and a second end of the screw rod is movably connected with a limiting sleeve; the expansion core comprises a conical end part, an expansion sleeve is sleeved on the outer side of the conical end part, the expansion sleeve is in contact with an inner hole of a half axle gear of the differential, and one end of the expansion sleeve is fixedly connected with a limiting sleeve through a rotating shaft; the rotating shaft is fixedly connected with a clamping plate; the supporting seat is arranged on the sliding block, and the limiting sleeve is arranged in the supporting seat; a pulling mechanism for eliminating axial clearance between the side gear and the differential case; the rotating mechanism drives the half shaft gear to rotate; and the contact of the measuring mechanism is in contact with the clamping plate. The device has the advantages of being simple to operate, high in result accuracy and capable of effectively reducing the risk of unqualified products flowing out.

Description

Differential gear backlash measuring device

Technical Field

The utility model relates to the technical field of differential assembly, in particular to a differential backlash measuring device.

Background

The differential assembly is one of the major components of an automotive transaxle that allows different drive wheels to rotate at different rotational speeds. The differential assembly mainly comprises a half axle shaft gear, a planetary half axle gear and a differential shell, and in the assembling process, the tooth clearance measurement needs to be carried out on the assembled differential assembly, so that the good meshing between the half axle gears is ensured.

Along with increasingly fierce market competition, the performance requirements of the market on the precision, the quality and the like of the differential are higher and higher, and the existing differential gear backlash measuring device cannot meet the measurement precision requirements or is complex in structure, time-consuming and labor-consuming in measurement and difficult to meet the existing backlash measurement requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a differential gear backlash measuring device which is high in measuring precision and convenient to use, and aims to solve the problems.

The utility model provides a differential backlash measuring device, comprising: the top of the table board is provided with a guide rail and a clamping seat, the guide rail is connected with a sliding block in a sliding manner, and the clamping seat is used for clamping a differential shell of a differential; the tensioning mechanism comprises a screw rod and a rotating shaft sleeved outside the screw rod, wherein a first end of the screw rod is in threaded connection with an expansion core, a second end of the screw rod is movably connected with a limiting sleeve, and the screw rod can freely rotate in the limiting sleeve; the expansion core comprises a conical end part, an expansion sleeve is sleeved on the outer side of the conical end part, the expansion sleeve is in contact with an inner hole of a half axle gear of the differential, and one end of the expansion sleeve is fixedly connected with the limiting sleeve through the rotating shaft; the rotating shaft is fixedly connected with a clamping plate; the supporting seat is arranged on the sliding block, the limiting sleeve is arranged in the supporting seat, and the supporting seat is used for limiting or allowing the limiting sleeve to rotate so as to limit or allow the expansion sleeve and the half axle gear to rotate; the pulling mechanism is used for driving the supporting seat to move towards the direction far away from the differential case, and eliminating the axial clearance between the half axle gear and the differential case; the rotating mechanism is used for applying torque to the tensioning mechanism to drive the half axle gear to rotate; and the contact of the measuring mechanism is in contact with the clamping plate.

Preferably, the clamping seat comprises a fixing part arranged on the table board, an opening and closing part connected with the fixing part in a rotating mode and a lock catch arranged on the fixing part, the lock catch is used for locking the opening and closing part on the fixing part, and a cavity used for clamping the differential case is formed between the fixing part and the opening and closing part.

Preferably, the limiting block is fixedly connected to the limiting sleeve, the supporting seat is movably connected with a limiting part, and the limiting block and the limiting part are detachably connected.

Preferably, the pulling mechanism comprises a balancing weight, a connecting rod and an eccentric block with a handle, one end of the connecting rod is connected with the balancing weight, and the other end of the connecting rod is rotatably connected with the supporting seat; the eccentric block is arranged below the connecting rod and is rotatably connected with the supporting seat.

Preferably, rotary mechanism includes the arm of force pole and sets up the weight of arm of force pole tip, can dismantle between arm of force pole and the stop collar and be connected.

Preferably, a through hole is formed in the limiting sleeve, a circle of stop block is arranged inside the limiting sleeve, the through hole allows an operator to rotate the screw rod from the outside, and the stop block axially limits the second end of the screw rod.

The device has the advantages that the device can be used for directly measuring the differential gear backlash and rechecking the accuracy of automatic backlash measuring equipment, is simple to operate, convenient to adjust various measuring parameters, easy to use and high in result accuracy, and can effectively reduce the risk of unqualified products flowing out.

Drawings

FIG. 1 is a schematic view of the differential backlash measurement apparatus of the present invention;

FIG. 2 is a perspective view of the differential backlash measurement apparatus of the present invention;

FIG. 3 is an enlarged schematic view of the pulling mechanism;

FIG. 4 is a cross-sectional view of the differential backlash measurement apparatus of the present invention;

fig. 5 is an enlarged view of the position where the stop collar is engaged with the screw.

Element number description:

1 differential mechanism

11 differential case

12 side gear

2 table top

21 support leg

22 clamping seat

221 opening and closing part

222 fixed part

223 lock catch

3 guide rail

31 sliding block

4 support seat

41 stopper

5 tensioning mechanism

51 screw

52 expansion core

53 expansion sleeve

54 stop block

55 position-limiting sleeve

551 stop block

56 clamping plate

57 rotating shaft

6 balancing weight

61 connecting rod

62 rotating shaft

7 eccentric block

71 handle

8 measuring mechanism

9 weight

91 arm of force lever

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element 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 the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 and fig. 2, the utility model provides a differential backlash measuring device, which comprises a table top 2, a tensioning mechanism 5, a supporting seat 4, a pulling mechanism, a rotating mechanism and a measuring mechanism 8. Wherein, the top of the table-board 2 is provided with a guide rail 3 and a clamping seat 22, and the bottom is preferably provided with a plurality of supporting legs 21, which is convenient for the operator to measure at a certain height. The guide rail 3 is slidably connected with a slide block 31, and the guide rail 3 plays a role in guiding the movement of the slide block 31. A clamping shoe 22 is provided in the middle of the guide rail 3 for clamping the differential case 11 of the differential 1. In a specific implementation, the clamping seat 22 is shown in fig. 3, and includes a fixing portion 222 disposed on the table top 2, an opening/closing portion 221 rotatably connected with the fixing portion 222, and a locking buckle 223 disposed on the fixing portion 222, wherein the locking buckle 223 is used for locking the opening/closing portion 221 on the fixing portion 222, a V-shaped groove is disposed at the top of the fixing portion 222, and a cavity for clamping the differential case 11 is formed between the V-shaped groove and the opening/closing portion 221.

As shown in fig. 4 and 5, the tensioning mechanism 5 includes a screw 51 and a rotating shaft 57 sleeved outside the screw 51, wherein a first end of the screw 51 is connected with the expanding core 52 in a threaded manner, and a second end is movably connected with a limiting sleeve 55. The stop sleeve 55 is disposed coaxially with the screw 51, and has a through hole therein, and a ring of stop 551 is disposed inside the through hole, the through hole allows an operator to rotate the screw 51 from the outside, and the stop 551 can axially stop the second end of the screw 51, allowing the screw 51 to freely rotate in the stop sleeve 55. The expansion core 52 includes a tapered end portion, an expansion sleeve 53 is sleeved outside the tapered end portion, the expansion sleeve 53 contacts with an inner hole of the side gear 12 of the differential 1, and one end thereof is fixedly connected with a limit sleeve 55 through a rotating shaft 57. The rotating shaft 57 is also fixedly connected with a clamping plate 56, and the clamping plate 56 can reflect the rotating angle of the side gear 12 along with the expansion sleeve 53, so that the measurement by the measuring mechanism 8 is facilitated.

As shown in fig. 2 and 3, the support seat 4 is provided on the slider 31, the limit sleeve 55 and the rotating shaft 57 are provided in the support seat 4, and the support seat 4 is used to limit or allow the limit sleeve 55 to rotate, thereby limiting the rotation of the expansion sleeve 53 and the side gear 12 via the rotating shaft 57. Specifically, a limiting block 54 is fixedly connected to the outer side of the limiting sleeve 55, a limiting member 41 is movably connected to the supporting seat 4, and an opening in threaded fit with the limiting member 41 is formed in the limiting block 54. When the limiting piece 41 is screwed into the opening of the limiting piece 54, the limiting sleeve 55 is locked by the supporting seat 4, and the limiting sleeve 55 cannot rotate; when the limiting member 41 is screwed out from the opening of the limiting block 54, the limiting sleeve 55 can rotate freely in the supporting seat 4, and the supporting seat 4 only supports the limiting sleeve 55 and the rotating shaft 57.

The pulling mechanism is used for driving the supporting seat 4 to move towards the direction far away from the differential case 11, eliminating the axial clearance between the side gear 12 and the differential case 11, and ensuring the accuracy of the tooth clearance measuring result. Those skilled in the art can use a device such as a linear motor, an air cylinder or a hydraulic cylinder as the pulling mechanism according to the requirement, and also can use a balance weight 6, a connecting rod 61 and an eccentric block 7 with a handle 71 to form the pulling mechanism according to an embodiment of the present invention. As shown in fig. 2-4, one end of the connecting rod 61 is connected to the counterweight 6, and the other end is rotatably connected to the supporting base 4 through a rotating shaft 62. The eccentric block 7 is arranged below the connecting rod 61 and is rotatably connected with the supporting seat 4. In the initial state, the eccentric block 7 is abutted against the connecting rod 61, the force on the connecting rod 61 is kept balanced, and the positions of the supporting seat 4 and the sliding block 31 are fixed; when it is necessary to eliminate the axial clearance between the side gear 12 and the differential case 11, the operator presses the handle 71 to rotate the eccentric mass 7, the connecting rod 61 loses the supporting force of the eccentric mass 7, and the weight 6 presses down to generate a horizontal component force to the connecting rod 61, so that the slide block 31 and the support seat 4 move away from the differential case 11 at the same time. The setting can exert the pulling force of the same size to two side gears 12 of differential mechanism 1 simultaneously like this to adjust the quality of balancing weight 6 as required, and then adapt to the differential mechanism 1 measurement demand that the model is different.

As shown in fig. 1 to 4, the rotating mechanism is used for applying a torque to the tensioning mechanism 5 to drive the side gear 12 to rotate, so as to measure the backlash. The rotating mechanism comprises a force arm rod 91 and a weight 9 arranged at the end part of the force arm rod 91, and the middle part of the force arm rod 91 is detachably connected with the limiting sleeve 55. By adjusting the mass of the weight 9 and the length of the arm lever 91, the torque applied to the side gear 12 can be adjusted.

As shown in fig. 2, the measuring mechanism 8 is a dial indicator or a dial indicator, the contact of which is in contact with the clamping plate 56, and the installation position is not limited, and the measuring mechanism can be arranged on the supporting base 4 or the table top 2.

In the utility model, the number of the measuring mechanism 8, the tensioning mechanism 5, the supporting seat 4, the sliding block 31 and the pulling mechanism is two, and the two measuring mechanisms are symmetrically arranged relative to the differential 1, so that the control of the two side gears 12 in the differential 1 is realized.

The use method of the differential gear backlash measuring device comprises the following steps:

first, the differential 1 is placed in the clamping shoe 22 and clamped, ensuring that the relative position of the differential 1 is fixed. The expansion sleeves 53 of the two tensioning mechanisms 5 are respectively inserted into the inner holes of the two side gears 12, then the limiting piece 41 is screwed into the opening of the limiting block 54, the position of the limiting sleeve 55 is fixed, the expansion sleeves 53 cannot rotate, and the two side gears 12 are in a limiting state. At this time, the screw 51 is rotated through the through hole of the stopper 55 to drive the expansion core 52 to move axially, the expansion core 52 presses the expansion sleeve 53 during the movement, and the expansion sleeve 53 expands outward and is clamped between the side gear 12 and the side gear. Then, the operator presses the handle 71, the eccentric block 7 rotates, the counter weight 6 presses down, the pulling mechanism drives the support base 4 to move away from the differential case 11, and the axial clearance between the two side gears 12 and the differential case 1 is eliminated at the same time. Then, the retainer 41 in one of the support seats 4 is unscrewed, and at this time, one side gear 12 can freely rotate with the expansion sleeve 53 and is in a free state, and the other side gear 12 is still in a retaining state. A force arm rod 91 is arranged on a limiting sleeve 55 arranged in the supporting seat 4, weights 9 with required torque are hung on different ends of the force arm rod 91 according to the front-back sequence, the limiting sleeve 55 drives a half gear 12 in a free state to rotate forward once and then reversely once through a rotating shaft 57 and an expansion sleeve 53, and the difference value j of a measuring mechanism 8 is read, wherein the tooth gap jn is j R/L, wherein R is the reference circle radius (mm) of the half gear 12, and L is the distance (mm) from a contact of the measuring mechanism 8 to the rotation axis of the half gear 12.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A differential backlash measuring device, comprising:

the top of the table top (2) is provided with a guide rail (3) and a clamping seat (22), the guide rail (3) is connected with a sliding block (31) in a sliding manner, and the clamping seat (22) is used for clamping a differential shell (11) of the differential (1);

the tensioning mechanism (5) comprises a screw rod (51) and a rotating shaft (57) sleeved on the outer side of the screw rod (51), a first end of the screw rod (51) is in threaded connection with an expansion core (52), a second end of the screw rod is movably connected with a limiting sleeve (55), and the screw rod (51) can freely rotate in the limiting sleeve (55); the expansion core (52) comprises a conical end part, an expansion sleeve (53) is sleeved on the outer side of the conical end part, the expansion sleeve (53) is in contact with an inner hole of a half axle gear (12) of the differential (1), and one end of the expansion sleeve is fixedly connected with the limiting sleeve (55) through the rotating shaft (57); a clamping plate (56) is fixedly connected to the rotating shaft (57);

the supporting seat (4) is arranged on the sliding block (31), the limiting sleeve (55) is arranged in the supporting seat (4), and the supporting seat (4) is used for limiting or allowing the limiting sleeve (55) to rotate so as to limit or allow the expansion sleeve (53) and the side gear (12) to rotate;

the pulling mechanism is used for driving the supporting seat (4) to move towards the direction far away from the differential case (11) and eliminating the axial clearance between the side gear (12) and the differential case (11);

the rotating mechanism is used for applying torque to the tensioning mechanism (5) to drive the half-axle gear (12) to rotate;

a measuring mechanism (8) whose contact head is in contact with the clamping plate (56).

2. The differential backlash measuring device according to claim 1, wherein the clamping seat (22) comprises a fixing portion (222) provided on the table top (2), an opening and closing portion (221) rotatably connected with the fixing portion (222), and a locking catch (223) provided on the fixing portion (222), the locking catch (223) being used for locking the opening and closing portion (221) on the fixing portion (222), and a cavity for clamping the differential case (11) is formed between the fixing portion (222) and the opening and closing portion (221).

3. The differential backlash measuring device according to claim 1, wherein a limiting block (54) is fixedly connected to the limiting sleeve (55), a limiting member (41) is movably connected to the supporting seat (4), and the limiting block (54) and the limiting member (41) are detachably connected.

4. A differential backlash measuring device according to claim 1, wherein said pulling mechanism comprises a weight block (6), a connecting rod (61) and an eccentric block (7) with a handle (71), one end of said connecting rod (61) is connected to said weight block (6) and the other end is rotatably connected to said supporting base (4); the eccentric block (7) is arranged below the connecting rod (61) and is in rotary connection with the supporting seat (4).

5. A differential backlash measuring device according to claim 1, wherein said rotating mechanism comprises a lever arm (91) and a weight (9) disposed at an end of said lever arm (91), said lever arm (91) being detachably connected to a stop collar (55).

6. A differential backlash measuring device according to claim 1, wherein said stop collar (55) has a through hole cut therein and a ring of stops (551) disposed therein, said through hole allowing an operator to rotate said screw (51) from the outside, said stops (551) axially limiting the second end of said screw (51).