CN210350944U - Direct-connected servo motor for resistance spot welding - Google Patents
Direct-connected servo motor for resistance spot welding Download PDFInfo
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- CN210350944U CN210350944U CN201921213567.1U CN201921213567U CN210350944U CN 210350944 U CN210350944 U CN 210350944U CN 201921213567 U CN201921213567 U CN 201921213567U CN 210350944 U CN210350944 U CN 210350944U
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- push rod
- screw rod
- nut
- spot welding
- shaft hole
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Abstract
The utility model relates to a direct-connected servo motor for resistance spot welding, which comprises a power execution system and a power device; the power device is provided with a power execution system; the power execution system comprises a push rod, a first shaft hole is formed in the push rod, a screw rod is installed in the first shaft hole, one end of the screw rod is connected with a power device, and the power device drives the screw rod to move; have the clearance between lead screw and the shaft hole one, the nut that cup joints of adaptation on the lead screw, laminating between nut and the push rod, the lead screw is rotatory the nut can promote push rod straight reciprocating motion, the utility model discloses simple structure, welding precision is high.
Description
Technical Field
The utility model belongs to the welding field, concretely relates to a power take off-direct-connected servo motor that is used for robot resistance spot welding equipment
Background
The method mainly adopts a parallel connection mode (also called a turn-back connection mode) of a motor and a power execution mechanism in the technical field of resistance welding.
Fig. 1 shows a conventional foldback servo motor, which is composed of a Fanuc robot motor a1 and a power actuator, wherein the motor a1 and a ball screw a4 are arranged in parallel at a certain distance, a driving wheel a2 is mounted on the motor a1, a synchronous pulley a5 is mounted on the ball screw a4, the driving wheel a2 is connected with a synchronous pulley a5 through a synchronous belt a3, and a ball screw nut a6 is mounted on a motor push rod a7 through a screw. The robot control motor 1 rotates and is connected with a synchronous belt a3 through belt wheels a2 and a5 to drive a ball screw a4, and the ball screw a4 rotates and drives a ball screw nut a6 and a motor push rod a7 to do linear reciprocating motion. The turn-back type servo motor is low in transmission efficiency, multiple in types of parts, large in size and weight and mirror image equipment exists in symmetrical stations.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: aiming at the defects existing in the prior art, the direct connection type servo motor which is higher in transmission efficiency, smaller in size and symmetrical is provided. The motor adopting the modular design has fewer part types, and the installation mode is more flexible to realize the technical scheme of the purposes as follows:
a direct connection type servo motor for resistance spot welding comprises a power execution system and a power device; the power device is provided with a power execution system; the power execution system comprises a push rod, a first shaft hole is formed in the push rod, a screw rod is installed in the first shaft hole, one end of the screw rod is connected with a power device, and the power device drives the screw rod to move; a gap is reserved between the screw rod and the first shaft hole, the screw rod is matched with the sleeved nut, the nut and the push rod are attached, the screw rod rotates, and the nut can push the push rod to do linear reciprocating motion.
Preferably, the power execution system further comprises a first coupling and a second coupling; the screw rod is sleeved in the shaft hole of the first coupler, an output shaft hole is formed in one end of the screw rod, and the output shaft is inserted into the output shaft hole of the screw rod; the output shaft also penetrates through a second coupling, and the second coupling is connected with a power device.
Preferably, an elastomer cushion pad is sleeved on an output shaft of the power device between the first coupling and the second coupling, and the elastomer cushion pad buffers the impact force of the push rod during reciprocating motion.
Preferably, a groove is arranged in the first shaft hole, a key groove and a spline are arranged between the groove and the nut, and the nut and the push rod are connected together through the spline.
Preferably, a cylinder sleeve is sleeved on the periphery of the power execution system, and the cylinder sleeve is of a split structure; the free end of the push rod is surrounded by a guide sleeve, and the guide sleeve is fixed on the cylinder sleeve and provides support for the movement of the push rod.
Preferably, a scraper is further arranged on the cylinder sleeve at the position close to the free end of the push rod, and the scraper scrapes sundries on the screw rod.
Preferably, the free end of the push rod is provided with a connecting shaft, and the connecting shaft is provided with a universal bearing.
Preferably, an oil injection nozzle is arranged on the connecting shaft, an oil inlet channel is arranged on the screw rod, the oil injection nozzle is communicated with the oil inlet channel, and lubricating oil is added into the oil injection nozzle.
The utility model discloses simple structure, welding accuracy is good.
Drawings
FIG. 1 is a prior art schematic;
FIG. 2 is a schematic view of the present invention;
fig. 3 is a schematic view of the coupling connection structure of the present invention;
fig. 4 is a schematic view of the installation position of the present invention;
FIG. 5 is a schematic view of the structure of the robot motor matching various brands of the present invention;
description of the figures: the device comprises a motor 1, a push rod 2, a screw rod 3, a nut 4, a first coupling 5, a spline 6, a pressing block 7, a second coupling 8, a connecting plate 9, an elastic cushion pad 10, a locking nut 11, a guide sleeve 12, a cylinder sleeve 13, a bearing 14, a bearing seat 15, a scraper 16, a connecting shaft 17, a universal bearing 18, an oil filling nozzle 19, a cushion pad 20, an anti-falling gasket 21, a sealing ring 22 and a trunnion fixing block 23;
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In the figure, the direct connection type servo motor for resistance spot welding comprises a power execution system and a power device, preferably, the power device is a motor 1, the motor 1 is connected with the power execution system, the motor 1 drives the power execution system to move, and the specific structure of the power execution system is described as follows:
the power execution system mainly comprises a push rod 2, an electrode cap is sleeved on the push rod 2 for welding, the push rod 2 needs to move back and forth, a first shaft hole is formed in the axis of the push rod 2, a screw rod 3 is accommodated in the first shaft hole, a nut 4 is sleeved on the screw rod 3 in a matched mode, a gap is formed between the screw rod 3 and the first shaft hole, the screw rod 3 rotates, and the nut 4 can push the push rod 2 to do linear reciprocating motion;
the screw rod 3 needs to be driven by a power device, so one end of the screw rod 3 is connected with the motor 1, in the utility model, the screw rod 3 is connected with the motor 1 by a coupling I5, and the coupling I5 belongs to one part of a power execution system; the first coupling 5 is sleeved on an output shaft of the motor 1; one end of the screw rod 3 is also provided with an output shaft hole, the output shaft is inserted into the output shaft hole of the coupling I5, the output shaft hole and the output shaft can adopt a static fit mode and a spline connection mode, and therefore the output shaft and the output shaft hole cannot be easily separated; when the motor 1 is started, the output shaft rotates to drive the screw rod 3 to rotate, the nut 4 makes reciprocating linear motion on the screw rod 3, and the nut 4 drives the push rod 2 to move when moving.
The principle that the nut 4 drives the push rod 2 to move is as follows: set up the recess in the shaft hole one, some ability holding of nut is in the recess, and the adaptation laminating between recess and the nut 4 when nut 4 moves along the lead screw, because form a laminating between nut 4 and the push rod 2, consequently nut 4 can promote a motion of push rod, in order to avoid the clearance because the cooperation produces between nut 4 and the push rod 2, sets up the keyway on the outer circumference of nut 4, is in the same place push rod 2 and nut 4 are fixed with keyway complex spline 6.
Preferably, a pressing block 7 is further arranged at the rear end of the nut 4, one end of the pressing block 7 is fixed on the push rod 2, and the nut 4 is fixed in the motor push rod 2 through a key 6 and the pressing block 7.
In the process that the nut 4 drives the push rod 2 to retreat, the inertia of the push rod 2 generates vibration force, and the power components such as the motor 1 and the like are damaged to a certain extent in the past, therefore, a coupler II 8 is further arranged, the coupler I5 is not directly connected with the motor 1, but the coupler II 8 replaces the coupler I5 to be connected with the motor 1, the coupler I5 retreats to a position in sequence, for the convenience of connection, a connecting plate 9 can be arranged on the end face of the motor 1 to avoid damage to the motor 1 due to direct contact and connection, after the coupler II 8 is fixed on the motor 1 through the connecting plate 9, the output shaft of the motor 1 is sleeved in the shaft hole of the coupler II 8, and the output shaft extending out of the shaft hole II is continuously inserted into the output shaft hole of the screw rod sleeved in the coupler I5; an elastic body cushion pad 10 is sleeved on an output shaft of the motor 1 between the first coupling 5 and the second coupling 8, and the elastic body cushion pad 10 is used for buffering the impact force generated when the push rod 2 reciprocates.
Preferably, the output shaft of the motor 1 is provided with threads, after the output shaft is inserted into the second coupler 8, the position of the second coupler 8 is fixed by using the locking nut 11, the risk that the second coupler 8 is separated from the output shaft is greatly reduced, and the stability of a series of subsequent parts is ensured.
The push rod 2 is a shaft part with a certain length, and in the running process, due to the reason of the certain length, the situation of deviation or vibration can be avoided in the process, so that the guide sleeve 12 is sleeved at the free end of the screw rod 3, the matching precision error between the guide sleeve 12 and the push rod 2 is not more than 0.5 mm, the guide sleeve 12 plays a role in correction, and the push rod 2 is led to advance according to the original track.
Of course, the guide sleeve 12 needs other components for supporting, so the cylinder sleeve 13 is sleeved outside the power execution system, one end of the cylinder sleeve 13 is fixed on the motor 1, the guide sleeve 12 is fixed on the cylinder sleeve 13, and the cylinder sleeve 13 not only plays a supporting role, but also protects the cleanness of the components of the power execution system and the like. The cylinder casing 13 may be a split structure, with the cylinder casing 13 supporting the guide sleeve 12 being a separate part.
Simultaneously, the first coupling 5 needs to rotate along with the output shaft, so that the bearing 14 is sleeved on the periphery of the first coupling 5, the bearing seat 15 is sleeved on the periphery of the bearing 14, the bearing seat 15 forms an independent part of the cylinder sleeve 13, and the cylinder sleeve 13 is made of a section.
A scraper 16 is arranged at one end of the guide sleeve 12 in the cylinder sleeve, and the scraper 16, the guide sleeve 12 and a sealing ring 22 are arranged on the push rod, so that welding slag and sundries under complex welding conditions can be removed when the push rod 2 makes reciprocating linear motion, and the cleanliness of the push rod 2 and the screw rod 3 is kept.
The free end of the push rod 2 is provided with a connecting shaft 17, and a universal bearing 18 is arranged in the connecting shaft 17. The universal bearing 18 compensates for errors caused by assembly errors and machining errors during connection with the electrode holder.
Still be provided with oiling nozzle 19 on the connecting axle 17, be provided with the oil feed passageway on the lead screw 3, oiling nozzle 19 and oil feed passageway intercommunication, accessible oiling nozzle 19 injects lubricated grease to lead screw 3 after using a period.
A buffer pad 20 is arranged in the connecting shaft 17, so that hard contact can be avoided when the motor push rod 2 returns, and a buffer effect is achieved. The front end of the screw rod 3 is provided with an anti-drop washer 21 which can avoid the nut from dropping off when exceeding the stroke.
According to fig. 4, the direct-connected servo motor and the welding tongs are installed in two ways: firstly, both sides of the cylinder sleeve 13 are provided with threads and pin holes which can be used for directly fixing a welding tongs; trunnion fixed blocks 23 are arranged on two sides of the two bearing seats, and the motor can be fixedly connected to the welding tongs in a mode of the trunnion fixed blocks 23.
Fig. 5 shows other cases of modular design of the present invention, which can be matched with common main flow welding robot motors such as ABB motor 1-1, Motoman motor 1-2, Kuka motor 1-3, etc. The connecting shaft is suitable for being connected with the C-shaped soldering pliers in a matching mode.
When the welding machine is used, the connecting shaft 17 is firstly aligned to an object to be welded, then the motor is started, and the motor drives the push rod to contact the object to be welded. The position of the connecting shaft 17 can be adjusted by means of a universal bearing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the embodiments of the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.
Claims (8)
1. A direct connection type servo motor for resistance spot welding comprises a power execution system and a power device; the method is characterized in that: the power device is provided with a power execution system; the power execution system comprises a push rod, a first shaft hole is formed in the push rod, a screw rod is installed in the first shaft hole, one end of the screw rod is connected with a power device, and the power device drives the screw rod to move; a gap is reserved between the screw rod and the first shaft hole, the screw rod is matched with the sleeved nut, the nut and the push rod are attached, the screw rod rotates, and the nut can push the push rod to do linear reciprocating motion.
2. A direct drive servomotor for resistance spot welding as set forth in claim 1, wherein: the power execution system also comprises a first coupling and a second coupling; the screw rod is sleeved in the shaft hole of the first coupler, an output shaft hole is formed in one end of the screw rod, and the output shaft is inserted into the output shaft hole of the screw rod; the output shaft also penetrates through a second coupling, and the second coupling is connected with a power device.
3. The direct type servo motor for resistance spot welding according to claim 2, wherein: an elastomer cushion pad is sleeved on an output shaft of the power device between the first coupling and the second coupling, and the elastomer cushion pad buffers the impact force of the push rod during reciprocating motion.
4. A direct drive servomotor for resistance spot welding as set forth in claim 1, wherein: a groove is formed in the first shaft hole, a key groove and a spline are formed between the groove and the nut, and the nut and the push rod are connected together through the spline.
5. A direct drive servomotor for resistance spot welding as set forth in claim 1, wherein:
a cylinder sleeve is sleeved on the periphery of the power execution system and is of a split structure; the free end of the push rod is surrounded by a guide sleeve, and the guide sleeve is fixed on the cylinder sleeve and provides support for the movement of the push rod.
6. The direct connection type servo motor for resistance spot welding according to claim 4, wherein: and a scraper is also arranged on the cylinder sleeve at the position close to the free end of the push rod and scrapes sundries on the screw rod.
7. A direct drive servomotor for resistance spot welding as set forth in claim 1, wherein: the free end of the push rod is provided with a connecting shaft, and the connecting shaft is provided with a universal bearing.
8. The direct connection type servo motor for resistance spot welding according to claim 7, wherein: the connecting shaft is provided with an oil injection nozzle, the screw rod is provided with an oil inlet channel, the oil injection nozzle is communicated with the oil inlet channel, and lubricating oil is added into the oil injection nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921213567.1U CN210350944U (en) | 2019-07-30 | 2019-07-30 | Direct-connected servo motor for resistance spot welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921213567.1U CN210350944U (en) | 2019-07-30 | 2019-07-30 | Direct-connected servo motor for resistance spot welding |
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| Publication Number | Publication Date |
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| CN210350944U true CN210350944U (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921213567.1U Active CN210350944U (en) | 2019-07-30 | 2019-07-30 | Direct-connected servo motor for resistance spot welding |
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| CN (1) | CN210350944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266142A (en) * | 2019-07-30 | 2019-09-20 | 韦孚（杭州）精密机械有限公司 | A kind of direct-connected servo motor for resistance spot welding |
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2019
- 2019-07-30 CN CN201921213567.1U patent/CN210350944U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266142A (en) * | 2019-07-30 | 2019-09-20 | 韦孚（杭州）精密机械有限公司 | A kind of direct-connected servo motor for resistance spot welding |
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