CN216770438U - Differential gear backlash measuring device - Google Patents

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

A differential gear backlash measuring device

technical field

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

Background technique

The differential assembly is one of the main components on the vehicle's drive axle, which allows different drive wheels to rotate at different speeds. The differential assembly is mainly composed of side axle gears, planetary axle gears and differential housing. In the assembly process, it is necessary to measure the backlash of the assembled differential assembly to ensure that the side gears good meshing between.

With the increasingly fierce market competition, the market has higher and higher requirements for the performance of differentials such as accuracy and quality, and the existing differential backlash measuring devices may not meet the accuracy requirements of the measurement, or the structure is complex and the measurement consumption is high. It is time-consuming and labor-intensive, and it is difficult to meet the existing backlash measurement requirements.

Utility model content

The purpose of the utility model is to provide a differential gear backlash measuring device with high measurement accuracy and convenient use, so as to solve the above problems.

The utility model provides a differential gear backlash measuring device, comprising: a table top, a guide rail and a clamping seat are arranged on the top, the guide rail is slidably connected with a slider, and the clamping seat is used for clamping the differential gear The differential case; the tensioning mechanism includes a screw rod and a rotating shaft sleeved on the outside of the screw rod, the first end of the screw rod is threadedly connected with an expansion core, and the second end is movably connected with a limiting sleeve, the screw rod It can rotate freely in the limiting sleeve; the expanding core includes a conical end, and an expanding sleeve is sleeved on the outer side of the conical end, and the expanding sleeve is connected to the side gear of the differential. The inner hole is in contact with the inner hole, and one end is fixedly connected to the limit sleeve through the rotating shaft; a clamping plate is fixedly connected to the rotating shaft; the support seat is set on the slider, and the limit sleeve is set In the support seat, the support seat is used to restrict or allow the rotation of the limiting sleeve, thereby restricting or allowing the expansion sleeve and the side gear to rotate; the pulling mechanism is used to drive the support seat to move away from the The differential case moves in the direction to eliminate the axial gap between the side gear and the differential case; the rotating mechanism is used to apply torque to the tensioning mechanism to drive the side gear to rotate ; a measuring mechanism whose contacts are in contact with the clamping plate.

Preferably, the clamping seat includes a fixing portion provided on the table surface, an opening and closing portion rotatably connected with the fixing portion, and a lock catch provided on the fixing portion, the lock catch is used for The opening and closing part is locked on the fixing part, and a cavity for clamping the differential case is formed between the fixing part and the opening and closing part.

Preferably, a limit block is fixedly connected to the limit sleeve, a limit piece is movably connected to the support base, and the limit block and the limit piece are detachably connected.

Preferably, the pulling mechanism includes a counterweight, a connecting rod and an eccentric block with a handle, one end of the connecting rod is connected with the counterweight, and the other end is rotatably connected with the support seat; the eccentric The block is arranged below the connecting rod and is rotatably connected with the support base.

Preferably, the rotating mechanism includes a lever arm and a weight disposed at the end of the lever arm, and the lever arm and the limiting sleeve are detachably connected.

Preferably, a through hole is opened in the limit sleeve, and a circle of stoppers is arranged inside, the through hole allows the operator to rotate the screw from the outside, and the stopper pivots the second end of the screw. to the limit.

The utility model has the advantages that the device can be used to directly measure the backlash of the differential gear, and can also be used to check the accuracy of the automatic backlash measuring equipment. High accuracy can effectively reduce the risk of outflow of substandard products.

Description of drawings

Fig. 1 is the structural representation of the differential gear backlash measuring device of the present utility model;

2 is a perspective view of the differential gear backlash measuring device of the present invention;

3 is an enlarged schematic view of the pulling mechanism;

4 is a cross-sectional view of the differential gear backlash measuring device of the present invention;

Fig. 5 is an enlarged view of the position where the limit sleeve and the screw are matched.

Component label description:

1 Differential

11 Differential housing

12 Side gear

2 countertops

21 Support legs

22 Clamping seat

221 Opening and closing part

222 Fixed part

223 Lock

3 rails

31 Slider

4 support base

41 Stopper

5 Tightening mechanism

51 Screw

52 core up

53 Sets

54 Limit block

55 limit sleeve

551 Stop

56 Clamping plate

57 reels

6 counterweights

61 connecting rod

62 reels

7 Eccentric block

71 handle

8 Measuring mechanism

9 Weights

91 lever arm

Detailed ways

The specific embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the drawings. The orientation or positional relationship shown is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as affecting the present utility model. New type of restriction.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between 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 situations.

As shown in FIG. 1 and FIG. 2 , the present invention provides a differential backlash measuring device, which includes a table 2 , a tensioning mechanism 5 , a support seat 4 , a pulling mechanism, a rotating mechanism and a measuring mechanism 8 . Wherein, the top of the table top 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, so as to facilitate the operator to perform measurement operations at a certain height. A sliding block 31 is slidably connected to the guide rail 3 , and the guide rail 3 plays a guiding role for the movement of the sliding block 31 . The clamping seat 22 is arranged in the middle of the guide rail 3 for clamping the differential case 11 of the differential 1 . In a specific implementation, as shown in FIG. 3 , the clamping seat 22 includes a fixing portion 222 arranged on the table top 2 , an opening and closing portion 221 rotatably connected with the fixing portion 222 , and a locking catch arranged on the fixing portion 222 . 223. The lock 223 is used to lock the opening and closing part 221 on the fixing part 222. The top of the fixing part 222 is provided with a V-shaped groove, which is formed between the opening and closing part 221 for clamping the differential case 11. 's cavity.

As shown in FIGS. 4 and 5 , the tensioning mechanism 5 includes a screw rod 51 and a rotating shaft 57 sleeved on the outside of the screw rod 51 . The first end of the screw rod 51 is threadedly connected with an expansion core 52 , and the second end is movably connected with a limiting sleeve 55 . The limiting sleeve 55 is coaxially arranged with the screw rod 51 , a through hole is opened therein, and a circle of stoppers 551 is arranged inside. The axial limit allows the screw 51 to rotate freely in the limit sleeve 55 . The expanding core 52 includes a conical end, and an expanding sleeve 53 is sleeved on the outer side of the conical end. The expanding sleeve 53 is in contact with the inner hole of the side gear 12 of the differential 1, and one end of the expanding sleeve 53 is connected to the limiter through the rotating shaft 57. The bit sleeve 55 is fixedly connected. A clamping plate 56 is also fixedly connected to the rotating shaft 57, and the clamping plate 56 can reflect the rotation angle of the side gear 12 with the expansion sleeve 53, which is convenient for the measurement mechanism 8 to measure.

As shown in FIG. 2 and FIG. 3 , the support base 4 is arranged on the slider 31 , the limiting sleeve 55 and the rotating shaft 57 are arranged in the supporting base 4 , and the support base 4 is used to limit or allow the rotation of the limiting sleeve 55 , and then pass the rotating shaft. 57 restricts the rotation of the expansion sleeve 53 and the side gear 12 . Specifically, a limiting block 54 is fixedly connected to the outer side of the limiting sleeve 55 , and a limiting member 41 is movably connected to the support base 4 . When the limiter 41 is screwed into the opening of the limiter block 54, the support base 4 locks the limiter sleeve 55, and the limiter sleeve 55 cannot rotate; when the limiter 41 is unscrewed from the opening of the limiter block 54, the limiter The position sleeve 55 can rotate freely in the support base 4 , and the support base 4 only supports the limit sleeve 55 and the rotating shaft 57 .

The pulling mechanism is used to drive the support base 4 to move away from the differential housing 11 , eliminate the axial gap between the side gear 12 and the differential housing 11 , and ensure accurate backlash measurement results. Those skilled in the art can use equipment such as linear motors, air cylinders or hydraulic cylinders as the pulling mechanism as required, or can use counterweight 6, connecting rod 61 and an eccentric with handle 71 as an embodiment of the present invention. The blocks 7 are combined to form a pulling mechanism. As shown in FIGS. 2-4 , one end of the connecting rod 61 is connected with the counterweight block 6 , and the other end is connected with the support base 4 through a rotating shaft 62 . The eccentric block 7 is arranged below the connecting rod 61 and is rotatably connected with the support base 4 . In the initial state, the eccentric block 7 is in contact with the connecting rod 61 to keep the force on the connecting rod 61 balanced, and the positions of the support base 4 and the slider 31 are fixed; When there is an axial gap between the two, the operator presses the handle 71 to make the eccentric block 7 rotate. At this time, the connecting rod 61 loses the supporting force of the eccentric block 7, and the counterweight 6 is pressed down, which will generate a horizontal component force on the connecting rod 61. As a result, the slider 31 and the support base 4 move in the direction away from the differential case 11 at the same time. In this way, the same amount of pulling force can be applied to the two side gears 12 of the differential 1 at the same time, and the mass of the counterweight 6 can be adjusted as required, thereby adapting to the measurement requirements of the differential 1 of different models.

As shown in Figures 1-4, the rotating mechanism is used to apply torque to the tensioning mechanism 5 to drive the side gear 12 to rotate, so as to measure the backlash. The rotating mechanism includes a lever arm 91 and a weight 9 disposed at the end of the lever arm 91 . The middle portion of the lever arm 91 is detachably connected to the limiting sleeve 55 . By adjusting the mass of the weight 9 and the length of the lever 91, the torque exerted on the side gear 12 can be adjusted.

As shown in FIG. 2 , the measuring mechanism 8 is a dial indicator or a dial indicator, and its contacts are in contact with the clamping plate 56 , and its installation position is not limited, and it can be installed on the support base 4 or on the table 2 superior.

In the present invention, the number of the above-mentioned measuring mechanism 8 , tensioning mechanism 5 , support seat 4 , slider 31 , and pulling mechanism are all two, and they are arranged symmetrically with respect to the differential 1 , so as to realize the adjustment of the Control of the two side gears 12 .

The use method of the differential gear backlash measuring device of the present utility model is as follows:

First, the differential 1 is placed in the clamping seat 22 and clamped to ensure that the relative position of the differential 1 is fixed. Insert the expansion sleeves 53 of the two tensioning mechanisms 5 into the inner holes of the two side gears 12 respectively, and then screw the stopper 41 into the opening of the stopper block 54. The position of the stopper sleeve 55 is fixed and the sleeve is expanded. 53 cannot rotate, and the two side gears 12 are in the limit state. At this time, the screw 51 is rotated through the through hole of the limit sleeve 55 to drive the expanding core 52 to move axially. clamped. Next, the operator presses the handle 71, the eccentric block 7 rotates, the counterweight 6 presses down, and the pulling mechanism drives the support base 4 to move away from the differential case 11, the two side gears 12 and the differential case The axial play between the bodies 1 is simultaneously eliminated. Then, unscrew the limiting member 41 in one of the support bases 4, 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 limiting state. Install the force arm rod 91 on the limit sleeve 55 set in the support base 4, and hang the weights 9 with the required torque on different ends of the force arm rod 91 in the front and rear order, so that the limit sleeve 55 passes through The rotating shaft 57 and the sleeve 53 drive the side gear 12 in a free state to rotate forward once and then reversely rotate once, and read the difference j of the measuring mechanism 8, the tooth gap jn=j*R/L, where R is half The index circle radius (mm) of the shaft gear 12, L is the distance (mm) from the contact of the measuring mechanism 8 to the rotation axis of the side gear 12.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and replacements can be made without departing from the technical principles of the present invention. These improvements And replacement should also be regarded as the protection scope of the present invention.

Claims (6)

1. A differential gear backlash measuring device is characterized in that, comprising: The table top (2) is provided with a guide rail (3) and a clamping seat (22) at the top, a slider (31) is slidably connected to the guide rail (3), and the clamping seat (22) is used for clamping the differential differential housing (11) of the gear (1); The tensioning mechanism (5) includes a screw (51) and a rotating shaft (57) sleeved on the outside of the screw (51), the first end of the screw (51) is threadedly connected with a core (52), and the second A limit sleeve (55) is movably connected on the end, and the screw rod (51) can rotate freely in the limit sleeve (55); the expanding core (52) includes a conical end, and the conical end An expansion sleeve (53) is sleeved on the outer side of the differential (1), the expansion sleeve (53) is in contact with the inner hole of the side gear (12) of the differential (1), and one end of the expansion sleeve (53) passes through the rotating shaft (57). ) is fixedly connected with the limiting sleeve (55); a clamping plate (56) is fixedly connected on the rotating shaft (57); A support seat (4) is provided on the slider (31), the limit sleeve (55) is provided in the support seat (4), and the support seat (4) is used to limit or allow the The limiting sleeve (55) rotates, thereby restricting or allowing the expanding sleeve (53) and the side gear (12) to rotate; A pulling mechanism is used to drive the support seat (4) to move in a direction away from the differential case (11), so as to eliminate the friction between the side gear (12) and the differential case (11). Axial clearance; a rotating mechanism for applying torque to the tensioning mechanism (5) to drive the side gear (12) to rotate; A measuring mechanism (8) whose contacts are in contact with the clamping plate (56). 2 . The differential gear backlash measuring device according to claim 1 , wherein the clamping seat ( 22 ) comprises a fixing part ( 222 ) arranged on the table ( 2 ), and the fixing part ( 222 ) is arranged on the table ( 2 ). 3 . An opening and closing part (221) rotatably connected between the parts (222) and a lock (223) provided on the fixing part (222), the locking buckle (223) is used to connect the opening and closing part (221) ) is locked on the fixing part (222), and a cavity for clamping the differential case (11) is formed between the fixing part (222) and the opening and closing part (221). 3. The differential gear backlash measuring device according to claim 1, characterized in that, a limit block (54) is fixedly connected on the limit sleeve (55), and a movable connection on the support seat (4) is limited A positioning member (41) is detachably connected between the limiting block (54) and the limiting member (41). 4. The differential backlash measuring device according to claim 1, wherein the pulling mechanism comprises a counterweight (6), a connecting rod (61) and an eccentric block (7) with a handle (71). ), one end of the connecting rod (61) is connected with the counterweight block (6), and the other end is rotatably connected with the support seat (4); the eccentric block (7) is arranged on the connecting rod ( 61), and is rotatably connected with the support base (4). 5 . The differential backlash measuring device according to claim 1 , wherein the rotating mechanism comprises a lever (91) and a weight (9) arranged at the end of the lever (91). 6 . ), the lever (91) and the limiting sleeve (55) are detachably connected. 6 . The differential gear backlash measuring device according to claim 1 , wherein a through hole is opened in the limit sleeve ( 55 ), and a ring of stoppers ( 551 ) is arranged inside, and the through hole The screw (51) is allowed to be rotated by the operator from the outside, and the second end of the screw (51) is axially limited by the stopper (551).

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