Auxiliary tool for mounting and dismounting bearing on torque sensor

Abstract

The utility model discloses an auxiliary tool for mounting and dismounting a bearing on a torque sensor, which belongs to the technical field of mechanical mounting and comprises a bottom plate, a top plate, a plurality of screws a, a plurality of nuts a and more than four bearing pressing components. 2N through holes a and 2N threaded holes b are uniformly distributed in the top plate in the circumferential direction of the top plate; threaded holes a in one-to-one correspondence with the through holes a are formed in the bottom plate; the bearing pressing assembly is installed on the bottom plate. When the device is used for bearing installation, a bearing to be installed is placed on the bottom plate, the torque sensor is placed on the bearing, and the top plate is placed on the torque sensor. Each screw rod a penetrates through the through hole a of the top plate and is in threaded connection with the threaded hole a of the bottom plate; each screw rod a is in threaded connection with a nut a; when the bearing dismounting device is used for dismounting a bearing, the bearing pressing assembly is pressed on the bearing; and a screw rod a is in threaded connection in each threaded hole b of the top plate. According to the utility model, the problem that the bearing and the torque sensor are easy to deform in the process of mounting and dismounting the bearing on the torque sensor can be solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical installation technical field, concretely relates to a kind of auxiliary tool for bearing installation and dismounting on torque sensor. BACKGROUND

[0002] Torque sensor is used on space station manipulator. In order to simulate the real load state of manipulator product, bearing needs to be installed on torque sensor, and mechanical loading test is carried out for multiple times. Bearing is installed at the end of torque sensor, and clearance fit exists between the bearing and torque sensor. Since bearing installed on torque sensor has large diameter, thin wall and narrow width, and torque sensor is hollow structure, wall thin aluminum alloy material, both are prone to deformation during installation and dismounting of bearing.

[0003] In order to reduce the deformation, the prior art adopts the method of padding cloth at force applying part to disperse stress, so as to reduce the risk of deformation. In addition, a tool named three-jaw puller is widely used for dismounting bearing sleeved on solid shaft. Three-jaw puller is mainly composed of handle, screw rod and puller claw. When used, the bottom end of screw rod is fixed at shaft end, and puller claw hooks bearing outer ring. By rotating screw rod, puller claw is driven to move bearing in axial direction, so as to realize dismounting of bearing. However, three-jaw puller needs a solid fulcrum to work effectively, and the hollow structure of torque sensor cannot provide such fulcrum, so it is not suitable for dismounting bearing on torque sensor with hollow structure.

[0004] Therefore, it is necessary to design a new type of auxiliary tool, which is specially used for installation and dismounting of bearing on torque sensor, to reduce the risk of deformation of torque sensor and bearing during the process. The tool should be able to adapt to the special structure of torque sensor, while providing stable and uniform force distribution, to ensure safe installation and dismounting of bearing, so as to ensure normal operation of manipulator and accurate measurement of sensor. CONTENT OF UTILITY MODEL

[0005] Therefore, the utility model provides an auxiliary tool for bearing installation and dismounting on torque sensor, which can solve the problem of easy deformation of bearing and torque sensor during installation and dismounting of bearing on torque sensor.

[0006] The utility model is realized by the following technical solutions:

[0007] An auxiliary tool for bearing installation and dismounting on torque sensor, comprising: bottom plate, top plate, a plurality of screw rods a, nut a corresponding connected with screw rod a and four or more bearing pressing assemblies.

[0008] 2N threaded holes b are uniformly distributed on the circumference of the top plate.

[0009] The bottom plate is provided with threaded holes a corresponding to the through holes a;

[0010] The four or more bearing pressing assemblies are installed on the bottom plate;

[0011] When used for bearing installation, the bearing to be installed is placed on the bottom plate, the torque sensor is placed on the bearing, and the top plate is placed on the torque sensor; a screw a is installed in each through hole a of the top plate, and the screw a is screwed with the threaded hole a of the bottom plate through the through hole a; a nut a is screwed on each screw a;

[0012] When used for bearing disassembly, the torque sensor with the bearing is placed on the top plate, and the bearing pressing assembly is pressed on the bearing; a screw a is screwed in each threaded hole b of the top plate.

[0013] Further, the auxiliary tool further comprises: a washer;

[0014] The washer is installed on the bottom plate, and the washer is provided with a limiting groove;

[0015] The bearing is installed in the groove of the washer, and the bearing and the washer are in clearance fit.

[0016] Further, the top plate is a circular plate, the outer diameter of the top plate is smaller than the outer diameter of the torque sensor and larger than the inner diameter of the torque sensor.

[0017] Further, one end surface of the top plate is provided with an annular boss, and each of the through holes a and the threaded holes b is located within the envelope of the annular boss;

[0018] When used for bearing installation, the annular boss of the top plate faces downward and is placed on the torque sensor; the annular boss extends into the interior of the torque sensor;

[0019] When used for bearing disassembly, the top plate is placed on the bottom plate with the annular boss facing upward; the torque sensor with the bearing is placed on the top plate, and the annular boss extends into the interior of the torque sensor.

[0020] Further, it further comprises: a plurality of thrust bearings;

[0021] The bottom plate is provided with a plurality of blind holes corresponding to the threaded holes b; the thrust bearings are installed in the blind holes one by one;

[0022] When used for bearing disassembly, the end of the screw a is supported on the shaft ring of the thrust bearing.

[0023] Further, each bearing pressing assembly is installed on the bottom plate through a screw b;

[0024] Each bearing pressing assembly comprises: a cushion block and a pressing plate; one transverse end of the pressing plate is placed on the cushion block, and the other transverse end extends out of the cushion block;

[0025] The pressing plate and the cushion block are installed on the base plate through the screw rod, and the end of the pressing plate extending out of the cushion block is pressed on the bearing.

[0026] Further, the positions of the cushion block and the pressing plate on the cushion block are both processed with through holes;

[0027] The screw rod b passes through the through holes of the pressing plate and the cushion block, and installs the pressing plate and the cushion block on the base plate;

[0028] The through hole on the pressing plate is a waist-shaped hole, and the length direction of the waist-shaped hole is along the transverse direction of the pressing plate.

[0029] Further, when the auxiliary tool is used for the installation of the torque sensor and the bearing, the bearing is pressed on the base plate through the bearing pressing assembly.

[0030] Further, one end surface of the base plate is provided with a foot pad, and the end surface where the foot pad is located is the bottom end of the base plate.

[0031] Beneficial effects:

[0032] (1) The auxiliary tool for the installation and dismounting of the bearing on the torque sensor, when used for the installation of the bearing, the top plate moves downward by screwing down the nut a to press the torque sensor; when used for the dismounting of the bearing, the top plate moves upward by rotating the screw rod a to push the torque sensor to move upward; the tool pushes the torque sensor through the top plate, so that the pushing force is more uniformly distributed, thereby avoiding the deformation of the bearing or the torque sensor in the installation or dismounting process, and further avoiding the damage of the torque sensor caused by the concentrated pushing force.

[0033] (2) The auxiliary tool for the installation and dismounting of the bearing on the torque sensor further comprises a gasket, the gasket is installed on the base plate, and the bearing and the gasket are in clearance fit, which can avoid the movement of the bearing in the installation process and avoid the shaking of the bearing in the process of installing the torque sensor, thereby improving the installation efficiency.

[0034] (3) The auxiliary tool for the installation and dismounting of the bearing on the torque sensor, the top plate is a circular plate, the outer diameter of the top plate is smaller than the outer diameter of the torque sensor and larger than the inner diameter of the torque sensor, and the top plate can be suitable for the installation and dismounting between the bearing and the torque sensor, which can reduce the cost.

[0035] (4) The utility model discloses a kind of auxiliary tool for bearing installation and dismounting on torque sensor, one end surface of top plate is processed with annular boss, the side wall of torque sensor is limited to top plate through the step surface at annular boss, prevent top plate from moving in horizontal direction during installation process, to affect installation and dismounting effect.

[0036] (5) The utility model discloses a kind of auxiliary tool for bearing installation and dismounting on torque sensor, screw rod a end is installed on the shaft ring of thrust bearing when dismounting, can avoid the damage caused to bottom plate by stress exerted by screw rod a to bottom plate.

[0037] (6) The utility model discloses a kind of auxiliary tool for bearing installation and dismounting on torque sensor, the through-hole on pressing plate is waist-shaped hole, the installation position of pressing plate can be adjusted, i.e. the length of pressing plate that protrudes from cushion block can be adjusted, so that pressing plate can be pressed on washer or bearing, to realize the dismounting of washer or bearing.

[0038] (7) The utility model discloses a kind of auxiliary tool for bearing installation and dismounting on torque sensor, when auxiliary tool is used for the installation of bearing, bearing is pressed on bottom plate by bearing pressing assembly, to further guarantee the stable installation of bearing.

[0039] (8) The utility model discloses a kind of auxiliary tool for bearing installation and dismounting on torque sensor, one end surface of bottom plate is equipped with pad foot, the pad foot can ensure that there is gap between bottom plate and operation platform, facilitate the handling of bottom plate. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 for the structure schematic view of the auxiliary tool of the utility model for installing bearing on torque sensor;

[0041] Figure 2 for the structure schematic view of the auxiliary tool of the utility model for dismounting bearing from torque sensor;

[0042] Wherein, 1-bottom plate, 2-washer, 3-top plate, 4-screw rod a, 5-nut a, 6-screw rod b, 7-cushion block, 8-pressing plate, 9-bearing, 10-torque sensor. DETAILED DESCRIPTION

[0043] The utility model is described in detail in connection with the drawings and examples.

[0044] Example 1:

[0045] The embodiment provides an auxiliary tool for bearing installation on torque sensor, as Figure 1As shown, it comprises a bottom plate 1, a gasket 2, a top plate 3, a plurality of screw rods a4 and a plurality of nuts a5 corresponding to the screw rods a4, which are used to mount the bearing 9 on the torque sensor 10.

[0046] The top plate 3 is a circular plate. The outer diameter of the top plate 3 is smaller than the outer diameter of the torque sensor 10 and larger than the inner diameter of the torque sensor 10. One end face of the top plate 3 is processed with an annular boss. The annular boss can extend into the inner cavity of the torque sensor 10. The top plate 3 is processed with 2N through holes a (N is an integer greater than or equal to 2), which are uniformly distributed along the circumference of the top plate 3. The through holes a are located within the envelope of the annular boss. The end face of the top plate 3, which is processed with the annular boss, is placed on one end face of the torque sensor 10, and the side wall of the torque sensor is limited by the annular boss to form a step face against the top plate 3, which is used to avoid the movement of the top plate 3 in the horizontal direction.

[0047] The bottom plate 1 is processed with threaded holes a corresponding to the through holes a of the top plate. One end face of the bottom plate 1 is provided with a foot. The foot end of the bottom plate 1 is placed downward on the operation platform. The foot is used to ensure that there is a gap between the bottom plate 1 and the operation platform, which is convenient for the handling of the bottom plate 1. One screw rod a4 is installed in each threaded hole a. The upper end of each screw rod a4 is threadedly connected with a nut 5.

[0048] The gasket 2 is provided with an annular limiting groove coaxial with it, which is used to install the bearing 9. The bearing 9 and the groove are clearance fit, which can avoid the shaking of the bearing 9 during the installation of the torque sensor 10. The gasket 2, which is processed with the limiting groove, is installed on the bottom plate 1 with the limiting groove upward.

[0049] In this embodiment, the bottom plate 1, the gasket 2, the top plate 3, the plurality of screw rods a4 and the plurality of nuts a5 are all made of stainless steel, so that the auxiliary tooling has the characteristics of not easy to deform at high and low temperatures, long service life, strong corrosion resistance and good economic effect.

[0050] When used for installing the bearing 9, the auxiliary tooling is arranged as follows:

[0051] When used for installing the bearing 9: the bottom plate 1 is placed on the operation platform, the gasket 2 with the bearing 9 is installed on the bottom plate 1, and the torque sensor 10 is placed on the bearing 9; the top plate 3 is placed on the torque sensor 10; at this time, the annular boss of the top plate 3 is located in the inner cavity of the torque sensor 10; each screw rod a4 passes through the corresponding through hole a and is threadedly connected with the corresponding threaded hole a of the bottom plate 1. At this time, the nut a5 is screwed into each screw rod a4 downward; two oppositely arranged screw rods a4 form a group, and each group of screw rods a4 is screwed in turn, and the two screw rods a4 of each group are screwed in at the same time, so that the torque sensor 10 can receive uniform pressure and avoid local pressure concentration to cause deformation of the torque sensor 10.

[0052] During installation, the top plate 3 moves downward with the screwing of the nut a5, and exerts downward pressure on the torque sensor 10, so that the torque sensor 10 is inserted into the inner ring of the bearing 9; when the bottom end surface of the torque sensor 10 is flush with the bottom end surface of the bearing 9, the installation is completed; after the installation is completed, the top plate 3, the screw rod a4 with the nut a5, the bottom plate 1, the washer 2, the bearing 9 and the torque sensor 10 form an integral whole. The bottom plate 1 and the washer 2 are used to fix the torque sensor 10 in the test equipment, so that they do not need to be disassembled.

[0053] Embodiment 2:

[0054] In this embodiment, an auxiliary tool for disassembling the bearing on the torque sensor is provided, which further comprises four or more bearing pressing assemblies, a plurality of thrust bearings and a plurality of screw rods b6 on the basis of the embodiment 1, so that it can be used to disassemble the torque sensor 10 and the bearing 9.

[0055] As shown in Figure 2 , the top plate 3 is further processed with threaded holes b corresponding to the screw rods a4. Each threaded hole b is located within the envelope of the annular boss of the top plate 3. The threaded holes b are threadedly connected with the screw rods a4. The bottom plate 1 is processed with a plurality of blind holes corresponding to the threaded holes b on the top plate 3.

[0056] The bearing pressing assemblies are uniformly distributed along the circumference of the bottom plate 1. Each bearing pressing assembly is installed on the bottom plate 1 by means of a screw rod b6. Each bearing pressing assembly comprises a cushion block 7 and a pressing plate 8. The pressing plate 8 is placed on the cushion block 7 at one end in the transverse direction (i.e. the horizontal direction in Figure 2 , and extends out of the cushion block 7 at the other end. The cushion block 7 and the pressing plate 8 are both processed with through holes at the positions on the cushion block 7. The screw rod b6 passes through the through holes of the pressing plate 8 and the cushion block 7 at the same time, and installs the pressing plate 8 and the cushion block 7 on the bottom plate 1. The end of the pressing plate 8 extending out of the cushion block 7 is used to press the bearing 9 or the washer 2. The through hole on the pressing plate 8 is a waist-shaped hole, and the length direction of the waist-shaped hole is along the transverse direction of the pressing plate 8, so that the length of the pressing plate 8 extending out of the cushion block 7 can be adjusted.

[0057] The bearing pressing assemblies can also be used for the installation of the bearing 9. That is, when the auxiliary tool is used for the installation of the torque sensor 10 and the bearing 9, the bearing 9 can be pressed on the bottom plate 1 by means of the bearing pressing assemblies. The bearing pressing assemblies can prevent the bearing 9 from shaking during the installation, so that the bearing 9 is easy to install.

[0058] As an embodiment, each blind hole of the bottom plate 1 is provided with a thrust bearing. The thrust bearing comprises a race and a shaft ring, and a rolling element is arranged between the race and the shaft ring to bear axial load. The race of the thrust bearing is fixed to the bottom plate 1. After the threaded hole b is screwed by the screw rod a4, the end of the screw rod a4 is mounted on the shaft ring of the thrust bearing. The thrust bearing can avoid the stress of the screw rod a4 on the bottom plate 1, and prevent the stress from damaging the bottom plate 1.

[0059] When the washer 2 or the bearing 9 is disassembled, the auxiliary tool is arranged as follows: the connection between the bottom plate 1 and the washer 2 is released, and the washer end of the bottom plate 1 is placed downward on the operation platform; the top plate 3 is placed on the bottom plate 1; at this time, the end of the top plate 3 which is processed with the annular boss is upward, and is aligned with the threaded hole b on the top plate 3 and the blind hole on the bottom plate 1; the torque sensor provided with the bearing 9 and the washer 2 is placed on the top plate 3; at this time, the end of the torque sensor 10 provided with the bearing 9 is still arranged downward, and the annular boss of the top plate 3 is located in the inner cavity of the torque sensor 10; the bearing pressing assembly is mounted on the bottom plate 1, so that the pressing plate 8 of the bearing pressing assembly is pressed above the washer 2; the threaded hole b is screwed by the screw rod a4, and the torque sensor 10 provided with the bearing 9 is pushed out upward from the washer 2; the screwing mode is consistent with the screwing mode S6 in embodiment 1; the screw rod a4 is disassembled, and the torque sensor provided with the bearing 9 is placed on the top plate 3 again; at the same time, the disassembled washer 2 is taken out; the position of the pressing plate 8 is adjusted, so that the pressing plate 8 is pressed above the bearing 9; the threaded hole b is screwed by the screw rod a4, and the torque sensor 10 is pushed out upward from the bearing 9.

[0060] Working principle:

[0061] During the disassembly process, the top plate 3 moves upward along with the rotation of the screw rod a4, and an upward thrust is applied to the torque sensor 10, so that the torque sensor 10 with the bearing 9 is separated from the washer 2 or the torque sensor 10 is separated from the inner ring of the bearing 9; when the torque sensor 10 with the bearing 9 is completely separated from the washer 2 or the torque sensor 10 is completely separated from the bearing 9, the disassembly is completed.

[0062] Since the auxiliary tool in the embodiment applies a thrust to the torque sensor 10 through the top plate 3, the thrust is more uniformly distributed, so that stress concentration is avoided, and deformation of the bearing 9 or the torque sensor 10 is further avoided.

[0063] To sum up, the above is only a preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An auxiliary tool for assisting in the mounting and dismounting of a torque sensor upper bearing, characterized in that, It comprises: a bottom plate (1), a top plate (3), a plurality of screw rods a (4), a plurality of nuts a (5) corresponding to the screw rods a (4), and four or more bearing pressing assemblies; The top plate (3) is uniformly distributed with 2N through holes a and 2N threaded holes b along its circumference; The bottom plate (1) is processed with threaded holes a corresponding to the through holes a; Four or more bearing pressing assemblies are installed on the bottom plate (1); When used for bearing installation, the bearing (9) to be installed is placed on the bottom plate (1), the torque sensor (10) is placed on the bearing, and the top plate (3) is placed on the torque sensor (10); One screw rod a (4) is installed in each through hole a of the top plate (3), and the screw rod a (4) is screwed with the threaded hole a of the bottom plate (1); One nut a (5) is screwed on each screw rod a (4); When used for bearing disassembly, the torque sensor (10) with the bearing (9) is placed on the top plate (3), and the bearing pressing assembly is pressed on the bearing (9); One screw rod a (4) is screwed in each threaded hole b of the top plate (3).

2. The tool as claimed in claim 1, wherein, The auxiliary tool also comprises a gasket (2); The gasket (2) is installed on the bottom plate (1), and a limiting groove is processed on the gasket (2); The bearing (9) is installed in the groove of the gasket (2), and the bearing (9) and the gasket (2) are gap fit.

3. The tool as claimed in claim 1, wherein, The top plate (3) is a circular plate, the outer diameter of the top plate (3) is smaller than the outer diameter of the torque sensor (10), and larger than the inner diameter of the torque sensor (10).

4. The tool as claimed in claim 1, wherein, One end face of the top plate (3) is processed with an annular boss, and each through hole a and threaded hole b is located within the envelope range of the annular boss; When used for bearing installation, the annular boss of the top plate (3) faces downward and is placed on the torque sensor (10); The annular boss extends into the interior of the torque sensor (10); When used for bearing disassembly, the top plate (3) is placed on the bottom plate (1), and the annular boss faces upward; The torque sensor (10) with the bearing (9) is placed on the top plate (3), and the annular boss extends into the interior of the torque sensor (10).

5. The tool as claimed in claim 1, wherein, It also comprises: A plurality of thrust bearings; A plurality of blind holes corresponding to the threaded holes b are processed on the bottom plate (1); The thrust bearings are installed in the blind holes one by one; When used for bearing disassembly, the end of the screw rod a (4) is supported on the shaft ring of the thrust bearing.

6. The tool of claim 1, wherein, Each bearing pressing assembly is installed on the bottom plate (1) by a screw rod b (6); Each bearing pressing assembly comprises a cushion block (7) and a pressing plate (8); One end of the pressing plate (8) is placed on the cushion block (7), and the other end extends out of the cushion block (7); The pressing plate (8) and the cushion block (7) are installed on the bottom plate by the screw rod, and the end of the pressing plate (8) extending out of the cushion block (7) is pressed on the bearing (9).

7. A tool as claimed in claim 6, wherein, The positions of the cushion block (7) and the pressing plate (8) on the cushion block (7) are processed with through holes; The screw rod b (6) passes through the through holes of the pressing plate (8) and the cushion block (7) to install the pressing plate (8) and the cushion block (7) on the bottom plate (1); The through hole on the pressing plate (8) is a waist-shaped hole, and the length direction of the waist-shaped hole is along the transverse direction of the pressing plate (8).

8. The tool of claim 1, wherein, When the auxiliary tool is used for installation of the torque sensor (10) and the bearing (9), the bearing (9) is pressed on the base plate (1) by the bearing pressing assembly.

9. A tool as claimed in any one of claims 1 to 8, wherein, One end surface of the base plate (1) is provided with a foot pad, and the end surface where the foot pad is located is the bottom end of the base plate (1).

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